diff --git a/container/entrypoint.sh b/container/entrypoint.sh
index d9b6b91de..7a09cce13 100755
--- a/container/entrypoint.sh
+++ b/container/entrypoint.sh
@@ -37,16 +37,16 @@ setup_ownership() {
     local type="$2"
 
     case "$type" in
-    file | directory) ;;
-    *)
-        cat <<EOF
+        file | directory) ;;
+        *)
+            cat <<EOF
 !!!
 !!! ERROR
 !!! "$type" is not a valid type, exiting...
 !!!
 EOF
-        exit 1
-        ;;
+            exit 1
+            ;;
     esac
 
     target_ownership=$(stat -c %U:%G "$target")
diff --git a/manage b/manage
index c0f055e3c..69f5b595a 100755
--- a/manage
+++ b/manage
@@ -65,7 +65,7 @@ while IFS= read -r line; do
     if [ "$line" != "tests/unit/settings/syntaxerror_settings.yml" ]; then
         YAMLLINT_FILES+=("$line")
     fi
-done <<< "$(git ls-files './tests/*.yml' './searx/*.yml' './utils/templates/etc/searxng/*.yml' '.github/*.yml' '.github/*/*.yml')"
+done <<<"$(git ls-files './tests/*.yml' './searx/*.yml' './utils/templates/etc/searxng/*.yml' '.github/*.yml' '.github/*/*.yml')"
 
 RST_FILES=(
     'README.rst'
@@ -113,7 +113,6 @@ environment ...
 EOF
 }
 
-
 if [ "$VERBOSE" = "1" ]; then
     SPHINX_VERBOSE="-v"
     PYLINT_VERBOSE="-v"
@@ -126,14 +125,14 @@ webapp.run() {
     local parent_proc="$$"
     (
         if [ "${LIVE_THEME}" ]; then
-            ( themes.live "${LIVE_THEME}" )
+            (themes.live "${LIVE_THEME}")
             kill $parent_proc
         fi
-    )&
+    ) &
     (
         sleep 3
         xdg-open http://127.0.0.1:8888/
-    )&
+    ) &
     SEARXNG_DEBUG=1 pyenv.cmd python -m searx.webapp
 }
 
@@ -143,10 +142,11 @@ gecko.driver() {
 
     build_msg INSTALL "gecko.driver"
     # run installation in a subprocess and activate pyenv
-    (   set -e
+    (
+        set -e
         pyenv.activate
 
-        INSTALLED_VERSION=$(geckodriver -V 2> /dev/null | head -1 | awk '{ print "v" $2}') || INSTALLED_VERSION=""
+        INSTALLED_VERSION=$(geckodriver -V 2>/dev/null | head -1 | awk '{ print "v" $2}') || INSTALLED_VERSION=""
         set +e
         if [ "${INSTALLED_VERSION}" = "${GECKODRIVER_VERSION}" ]; then
             build_msg INSTALL "geckodriver already installed"
@@ -154,13 +154,13 @@ gecko.driver() {
         fi
         PLATFORM="$(python -c 'import platform; print(platform.system().lower(), platform.architecture()[0])')"
         case "$PLATFORM" in
-            "linux 32bit" | "linux2 32bit") ARCH="linux32";;
-            "linux 64bit" | "linux2 64bit") ARCH="linux64";;
-            "windows 32 bit") ARCH="win32";;
-            "windows 64 bit") ARCH="win64";;
-            "mac 64bit") ARCH="macos";;
+            "linux 32bit" | "linux2 32bit") ARCH="linux32" ;;
+            "linux 64bit" | "linux2 64bit") ARCH="linux64" ;;
+            "windows 32 bit") ARCH="win32" ;;
+            "windows 64 bit") ARCH="win64" ;;
+            "mac 64bit") ARCH="macos" ;;
         esac
-        GECKODRIVER_URL="https://github.com/mozilla/geckodriver/releases/download/$GECKODRIVER_VERSION/geckodriver-$GECKODRIVER_VERSION-$ARCH.tar.gz";
+        GECKODRIVER_URL="https://github.com/mozilla/geckodriver/releases/download/$GECKODRIVER_VERSION/geckodriver-$GECKODRIVER_VERSION-$ARCH.tar.gz"
 
         build_msg GECKO "Installing ${PY_ENV_BIN}/geckodriver from $GECKODRIVER_URL"
 
@@ -175,13 +175,14 @@ gecko.driver() {
 py.build() {
     build_msg BUILD "python package ${PYDIST}"
     pyenv.cmd python setup.py \
-              sdist -d "${PYDIST}" \
-              bdist_wheel --bdist-dir "${PYBUILD}" -d "${PYDIST}"
+        sdist -d "${PYDIST}" \
+        bdist_wheel --bdist-dir "${PYBUILD}" -d "${PYDIST}"
 }
 
 py.clean() {
     build_msg CLEAN pyenv
-    (   set -e
+    (
+        set -e
         pyenv.drop
         [ "$VERBOSE" = "1" ] && set -x
         rm -rf "${PYDIST}" "${PYBUILD}" "${PY_ENV}" ./.tox ./*.egg-info
@@ -192,7 +193,7 @@ py.clean() {
 }
 
 pyenv.check() {
-    cat  <<EOF
+    cat <<EOF
 import yaml
 print('import yaml --> OK')
 EOF
@@ -201,13 +202,14 @@ EOF
 pyenv.install() {
 
     if ! pyenv.OK; then
-        py.clean > /dev/null
+        py.clean >/dev/null
     fi
-    if pyenv.install.OK > /dev/null; then
+    if pyenv.install.OK >/dev/null; then
         return 0
     fi
 
-    (   set -e
+    (
+        set -e
         pyenv
         build_msg PYENV "[install] pip install --use-pep517 --no-build-isolation -e 'searx${PY_SETUP_EXTRAS}'"
         "${PY_ENV_BIN}/python" -m pip install --use-pep517 --no-build-isolation -e ".${PY_SETUP_EXTRAS}"
@@ -220,8 +222,8 @@ pyenv.install() {
 
 pyenv.uninstall() {
     build_msg PYENV "[pyenv.uninstall] uninstall packages: ${PYOBJECTS}"
-    pyenv.cmd python setup.py develop --uninstall 2>&1 \
-        | prefix_stdout "${_Blue}PYENV     ${_creset}[pyenv.uninstall] "
+    pyenv.cmd python setup.py develop --uninstall 2>&1 |
+        prefix_stdout "${_Blue}PYENV     ${_creset}[pyenv.uninstall] "
 
 }
 
@@ -243,7 +245,7 @@ docs.prebuild() {
         set -e
         [ "$VERBOSE" = "1" ] && set -x
         mkdir -p "${DOCS_BUILD}/includes"
-        ./utils/searxng.sh searxng.doc.rst >  "${DOCS_BUILD}/includes/searxng.rst"
+        ./utils/searxng.sh searxng.doc.rst >"${DOCS_BUILD}/includes/searxng.rst"
         pyenv.cmd searxng_extra/docs_prebuild
     )
     dump_return $?
@@ -253,7 +255,8 @@ docs.prebuild() {
 main() {
 
     local _type
-    local cmd="$1"; shift
+    local cmd="$1"
+    shift
 
     if [ "$cmd" == "" ]; then
         help
@@ -262,8 +265,11 @@ main() {
     fi
 
     case "$cmd" in
-        --getenv) var="$1"; echo "${!var}";;
-        --help) help;;
+        --getenv)
+            var="$1"
+            echo "${!var}"
+            ;;
+        --help) help ;;
         --*)
             help
             err_msg "unknown option $cmd"
diff --git a/utils/brand.sh b/utils/brand.sh
index 1749efb31..ed8ec174b 100755
--- a/utils/brand.sh
+++ b/utils/brand.sh
@@ -8,11 +8,11 @@ build.env.export() {
     GIT_BRANCH="$(git branch | grep '\*' | cut -d' ' -f2-)"
     GIT_REMOTE="$(git config "branch.${GIT_BRANCH}.remote")"
     GIT_URL="$(git config --get "remote.${GIT_REMOTE}.url")"
-    if [[ "${GIT_URL}" == git@* ]]; then
+    if [[ ${GIT_URL} == git@* ]]; then
         GIT_URL="${GIT_URL/://}"
         GIT_URL="${GIT_URL/git@/https://}"
     fi
-    if [[ "${GIT_URL}" == *.git ]]; then
+    if [[ ${GIT_URL} == *.git ]]; then
         GIT_URL="${GIT_URL%.git}"
     fi
 
@@ -27,6 +27,6 @@ build.env.export() {
 
 }
 
-pushd "${REPO_ROOT}" &> /dev/null
+pushd "${REPO_ROOT}" &>/dev/null
 build.env.export
-popd &> /dev/null
+popd &>/dev/null
diff --git a/utils/lib.sh b/utils/lib.sh
index 7886520c6..6e09f0f09 100755
--- a/utils/lib.sh
+++ b/utils/lib.sh
@@ -4,11 +4,20 @@
 # shellcheck disable=SC2059,SC1117
 
 # ubuntu, debian, arch, fedora, centos ...
-DIST_ID=$(source /etc/os-release; echo "$ID");
+DIST_ID=$(
+    source /etc/os-release
+    echo "$ID"
+)
 # shellcheck disable=SC2034
-DIST_VERS=$(source /etc/os-release; echo "$VERSION_ID");
+DIST_VERS=$(
+    source /etc/os-release
+    echo "$VERSION_ID"
+)
 # shellcheck disable=SC2034
-DIST_VERSION_CODENAME=$(source /etc/os-release; echo "$VERSION_CODENAME");
+DIST_VERSION_CODENAME=$(
+    source /etc/os-release
+    echo "$VERSION_CODENAME"
+)
 
 ADMIN_NAME="${ADMIN_NAME:-$(git config user.name)}"
 ADMIN_NAME="${ADMIN_NAME:-$USER}"
@@ -16,25 +25,25 @@ ADMIN_NAME="${ADMIN_NAME:-$USER}"
 ADMIN_EMAIL="${ADMIN_EMAIL:-$(git config user.email)}"
 ADMIN_EMAIL="${ADMIN_EMAIL:-$USER@$(hostname)}"
 
-if [[ -z "${REPO_ROOT}" ]]; then
+if [[ -z ${REPO_ROOT} ]]; then
     REPO_ROOT=$(dirname "${BASH_SOURCE[0]}")
-    while [ -h "${REPO_ROOT}" ] ; do
+    while [ -h "${REPO_ROOT}" ]; do
         REPO_ROOT=$(readlink "${REPO_ROOT}")
     done
-    REPO_ROOT=$(cd "${REPO_ROOT}/.." && pwd -P )
+    REPO_ROOT=$(cd "${REPO_ROOT}/.." && pwd -P)
 fi
 
 if [[ -z ${TEMPLATES} ]]; then
     TEMPLATES="${REPO_ROOT}/utils/templates"
 fi
 
-if [[ -z "$CACHE" ]]; then
+if [[ -z $CACHE ]]; then
     CACHE="${REPO_ROOT}/cache"
 fi
 
 if [[ -z ${DIFF_CMD} ]]; then
     DIFF_CMD="diff -u"
-    if command -v colordiff >/dev/null;  then
+    if command -v colordiff >/dev/null; then
         DIFF_CMD="colordiff -u"
     fi
 fi
@@ -42,7 +51,7 @@ fi
 DOT_CONFIG="${DOT_CONFIG:-${REPO_ROOT}/.config.sh}"
 
 source_dot_config() {
-    if [[ ! -e "${DOT_CONFIG}" ]]; then
+    if [[ ! -e ${DOT_CONFIG} ]]; then
         err_msg "configuration does not exists at: ${DOT_CONFIG}"
         return 42
     fi
@@ -53,7 +62,7 @@ source_dot_config() {
 sudo_or_exit() {
     # usage: sudo_or_exit
 
-    if [ ! "$(id -u)" -eq 0 ];  then
+    if [ ! "$(id -u)" -eq 0 ]; then
         err_msg "this command requires root (sudo) privilege!" >&2
         exit 42
     fi
@@ -87,7 +96,7 @@ set_terminal_colors() {
     _hide_cursor='\e[?25l'
 
     # SGR (Select Graphic Rendition) parameters
-    _creset='\e[0m'  # reset all attributes
+    _creset='\e[0m' # reset all attributes
 
     # original specification only had 8 colors
     _colors=8
@@ -128,9 +137,9 @@ rst_title() {
     # usage: rst_title <header-text> [part|chapter|section]
 
     case ${2-chapter} in
-        part)     printf "\n${_BGreen}${1//?/=}${_creset}\n${_BCyan}${1}${_creset}\n${_BGreen}${1//?/=}${_creset}\n";;
-        chapter)  printf "\n${_BCyan}${1}${_creset}\n${_BGreen}${1//?/=}${_creset}\n";;
-        section)  printf "\n${_BCyan}${1}${_creset}\n${_BGreen}${1//?/-}${_creset}\n";;
+        part) printf "\n${_BGreen}${1//?/=}${_creset}\n${_BCyan}${1}${_creset}\n${_BGreen}${1//?/=}${_creset}\n" ;;
+        chapter) printf "\n${_BCyan}${1}${_creset}\n${_BGreen}${1//?/=}${_creset}\n" ;;
+        section) printf "\n${_BCyan}${1}${_creset}\n${_BGreen}${1//?/-}${_creset}\n" ;;
         *)
             err_msg "invalid argument '${2}' in line $(caller)"
             return 42
@@ -150,16 +159,16 @@ rst_para() {
 }
 
 die() {
-    echo -e "${_BRed}ERROR:${_creset} ${BASH_SOURCE[1]}: line ${BASH_LINENO[0]}: ${2-died ${1-1}}" >&2;
+    echo -e "${_BRed}ERROR:${_creset} ${BASH_SOURCE[1]}: line ${BASH_LINENO[0]}: ${2-died ${1-1}}" >&2
     exit "${1-1}"
 }
 
 die_caller() {
-    echo -e "${_BRed}ERROR:${_creset} ${BASH_SOURCE[2]}: line ${BASH_LINENO[1]}: ${FUNCNAME[1]}(): ${2-died ${1-1}}" >&2;
+    echo -e "${_BRed}ERROR:${_creset} ${BASH_SOURCE[2]}: line ${BASH_LINENO[1]}: ${FUNCNAME[1]}(): ${2-died ${1-1}}" >&2
     exit "${1-1}"
 }
 
-err_msg()  { echo -e "${_BRed}ERROR:${_creset} $*" >&2; }
+err_msg() { echo -e "${_BRed}ERROR:${_creset} $*" >&2; }
 warn_msg() { echo -e "${_BBlue}WARN:${_creset}  $*" >&2; }
 info_msg() { echo -e "${_BYellow}INFO:${_creset}  $*" >&2; }
 
@@ -181,17 +190,17 @@ dump_return() {
 
 clean_stdin() {
     if [[ $(uname -s) != 'Darwin' ]]; then
-        while read -r -n1 -t 0.1; do : ; done
+        while read -r -n1 -t 0.1; do :; done
     fi
 }
 
-wait_key(){
+wait_key() {
     # usage: wait_key [<timeout in sec>]
 
     clean_stdin
     local _t=$1
     local msg="${MSG}"
-    [[ -z "$msg" ]] && msg="${_Green}** press any [${_BCyan}KEY${_Green}] to continue **${_creset}"
+    [[ -z $msg ]] && msg="${_Green}** press any [${_BCyan}KEY${_Green}] to continue **${_creset}"
 
     [[ -n $FORCE_TIMEOUT ]] && _t=$FORCE_TIMEOUT
     [[ -n $_t ]] && _t="-t $_t"
@@ -233,7 +242,8 @@ ask_yn() {
         # shellcheck disable=SC2086,SC2229
         read -r -n1 $_t
         if [[ -z $REPLY ]]; then
-            printf "$default\n"; break
+            printf "$default\n"
+            break
         elif [[ $REPLY =~ ^[Yy]$ ]]; then
             exit_val=${EXIT_YES}
             printf "\n"
@@ -250,7 +260,7 @@ ask_yn() {
     return $exit_val
 }
 
-tee_stderr () {
+tee_stderr() {
 
     # usage::
     #   tee_stderr 1 <<EOF | python -i
@@ -260,23 +270,23 @@ tee_stderr () {
     #   >>> print("hello")
     #    hello
 
-    local _t="0";
-    if [[ -n $1 ]] ; then _t="$1"; fi
+    local _t="0"
+    if [[ -n $1 ]]; then _t="$1"; fi
 
     (while read -r line; do
-         # shellcheck disable=SC2086,SC2229
-         sleep $_t
-         echo -e "$line" >&2
-         echo "$line"
+        # shellcheck disable=SC2086,SC2229
+        sleep $_t
+        echo -e "$line" >&2
+        echo "$line"
     done)
 }
 
-prefix_stdout () {
+prefix_stdout() {
     # usage: <cmd> | prefix_stdout [prefix]
 
     local prefix="${_BYellow}-->|${_creset}"
 
-    if [[ -n $1 ]] ; then prefix="$1"; fi
+    if [[ -n $1 ]]; then prefix="$1"; fi
 
     # shellcheck disable=SC2162
     (while IFS= read line; do
@@ -296,7 +306,7 @@ append_line() {
 
     local LINE=$1
     local FILE=$2
-    grep -qFs -- "$LINE" "$FILE" || echo "$LINE" >> "$FILE"
+    grep -qFs -- "$LINE" "$FILE" || echo "$LINE" >>"$FILE"
 }
 
 cache_download() {
@@ -311,7 +321,7 @@ cache_download() {
         mkdir -p "${CACHE}"
     fi
 
-    if [[ -f "${CACHE}/$2" ]] ; then
+    if [[ -f "${CACHE}/$2" ]]; then
         info_msg "already cached: $1"
         info_msg "  --> ${CACHE}/$2"
     fi
@@ -320,11 +330,13 @@ cache_download() {
         info_msg "caching: $1"
         info_msg "  --> ${CACHE}/$2"
         if [[ -n ${SUDO_USER} ]]; then
-            sudo -u "${SUDO_USER}" wget --progress=bar -O "${CACHE}/$2" "$1" ; exit_value=$?
+            sudo -u "${SUDO_USER}" wget --progress=bar -O "${CACHE}/$2" "$1"
+            exit_value=$?
         else
-            wget --progress=bar -O "${CACHE}/$2" "$1" ; exit_value=$?
+            wget --progress=bar -O "${CACHE}/$2" "$1"
+            exit_value=$?
         fi
-        if [[ ! $exit_value = 0 ]]; then
+        if [[ $exit_value != 0 ]]; then
             err_msg "failed to download: $1"
         fi
     fi
@@ -350,7 +362,7 @@ choose_one() {
     local default=${DEFAULT_SELECT-1}
     local REPLY
     local env_name=$1 && shift
-    local choice=$1;
+    local choice=$1
     local max="${#@}"
     local _t
     [[ -n $FORCE_TIMEOUT ]] && _t=$FORCE_TIMEOUT
@@ -358,8 +370,8 @@ choose_one() {
 
     list=("$@")
     echo -e "${_BGreen}Menu::${_creset}"
-    for ((i=1; i<= $((max -1)); i++)); do
-        if [[ "$i" == "$default" ]]; then
+    for ((i = 1; i <= $((max - 1)); i++)); do
+        if [[ $i == "$default" ]]; then
             echo -e "  ${_BGreen}$i.${_creset}) ${list[$i]} [default]"
         else
             echo -e "  $i.) ${list[$i]}"
@@ -369,7 +381,7 @@ choose_one() {
         clean_stdin
         printf "$1 [${_BGreen}$default${_creset}] "
 
-        if (( 10 > max )); then
+        if ((10 > max)); then
             # shellcheck disable=SC2086,SC2229
             read -r -n1 $_t
         else
@@ -377,7 +389,7 @@ choose_one() {
             read -r $_t
         fi
         # selection fits
-        [[ $REPLY =~ ^-?[0-9]+$ ]] && (( REPLY > 0 )) && (( REPLY < max )) && break
+        [[ $REPLY =~ ^-?[0-9]+$ ]] && ((REPLY > 0)) && ((REPLY < max)) && break
 
         # take default
         [[ -z $REPLY ]] && REPLY=$default && break
@@ -414,8 +426,14 @@ install_template() {
 
     for i in "$@"; do
         case $i in
-            --no-eval) do_eval=0; shift ;;
-            --variant=*) variant=":${i#*=}"; shift ;;
+            --no-eval)
+                do_eval=0
+                shift
+                ;;
+            --variant=*)
+                variant=":${i#*=}"
+                shift
+                ;;
             *) pos_args+=("$i") ;;
         esac
     done
@@ -431,24 +449,24 @@ install_template() {
     info_msg "install (eval=$do_eval): ${dst}"
     [[ -n $variant ]] && info_msg "variant --> ${variant}"
 
-    if [[ ! -f "${template_origin}" ]] ; then
+    if [[ ! -f ${template_origin} ]]; then
         err_msg "${template_origin} does not exists"
         err_msg "... can't install $dst"
         wait_key 30
         return 42
     fi
 
-    if [[ "$do_eval" == "1" ]]; then
+    if [[ $do_eval == "1" ]]; then
         template_file="${CACHE}${dst}${variant}"
-	info_msg "BUILD ${template_file}"
-	info_msg "BUILD using template ${template_origin}"
+        info_msg "BUILD ${template_file}"
+        info_msg "BUILD using template ${template_origin}"
         if [[ -n ${SUDO_USER} ]]; then
             sudo -u "${SUDO_USER}" mkdir -p "$(dirname "${template_file}")"
         else
             mkdir -p "$(dirname "${template_file}")"
         fi
         # shellcheck disable=SC2086
-        eval "echo \"$(cat ${template_origin})\"" > "${template_file}"
+        eval "echo \"$(cat ${template_origin})\"" >"${template_file}"
         if [[ -n ${SUDO_USER} ]]; then
             chown "${SUDO_USER}:${SUDO_USER}" "${template_file}"
         fi
@@ -458,14 +476,14 @@ install_template() {
 
     mkdir -p "$(dirname "${dst}")"
 
-    if [[ ! -f "${dst}" ]]; then
+    if [[ ! -f ${dst} ]]; then
         info_msg "install: ${template_file}"
         sudo -H install -v -o "${owner}" -g "${group}" -m "${chmod}" \
-             "${template_file}" "${dst}" | prefix_stdout
+            "${template_file}" "${dst}" | prefix_stdout
         return $?
     fi
 
-    if [[ -f "${dst}" ]] && cmp --silent "${template_file}" "${dst}" ; then
+    if [[ -f ${dst} ]] && cmp --silent "${template_file}" "${dst}"; then
         info_msg "file ${dst} already installed"
         return 0
     fi
@@ -474,16 +492,16 @@ install_template() {
 
     while true; do
         choose_one _reply "choose next step with file $dst" \
-                   "replace file" \
-                   "leave file unchanged" \
-                   "interactive shell" \
-                   "diff files"
+            "replace file" \
+            "leave file unchanged" \
+            "interactive shell" \
+            "diff files"
 
         case $_reply in
             "replace file")
                 info_msg "install: ${template_file}"
                 sudo -H install -v -o "${owner}" -g "${group}" -m "${chmod}" \
-                     "${template_file}" "${dst}" | prefix_stdout
+                    "${template_file}" "${dst}" | prefix_stdout
                 break
                 ;;
             "leave file unchanged")
@@ -503,6 +521,7 @@ install_template() {
                 ;;
             "diff files")
                 $DIFF_CMD "${dst}" "${template_file}" | prefix_stdout
+                ;;
         esac
     done
 }
@@ -514,14 +533,14 @@ service_is_available() {
     [[ -z $1 ]] && die_caller 42 "missing argument <URL>"
     local URL="$1"
     http_code=$(curl -H 'Cache-Control: no-cache' \
-         --silent -o /dev/null --head --write-out '%{http_code}' --insecure \
-         "${URL}")
+        --silent -o /dev/null --head --write-out '%{http_code}' --insecure \
+        "${URL}")
     exit_val=$?
-    if [[ $exit_val = 0 ]]; then
+    if [[ $exit_val == 0 ]]; then
         info_msg "got $http_code from ${URL}"
     fi
     case "$http_code" in
-        404|410|423) exit_val=$http_code;;
+        404 | 410 | 423) exit_val=$http_code ;;
     esac
     return "$exit_val"
 }
@@ -549,7 +568,7 @@ PYBUILD="${PYBUILD:=build/py${PY}}"
 #PY_SETUP_EXTRAS='[develop,test]'
 PY_SETUP_EXTRAS="${PY_SETUP_EXTRAS:=[develop,test]}"
 
-PIP_BOILERPLATE=( pip wheel setuptools )
+PIP_BOILERPLATE=(pip wheel setuptools)
 
 # shellcheck disable=SC2120
 pyenv() {
@@ -563,28 +582,28 @@ pyenv() {
     # files.
 
     required_commands \
-        sha256sum "${PYTHON}" \
-        || exit
+        sha256sum "${PYTHON}" ||
+        exit
 
     local pip_req=()
 
-    if ! pyenv.OK > /dev/null; then
+    if ! pyenv.OK >/dev/null; then
         rm -f "${PY_ENV}/${PY_ENV_REQ}.sha256"
-        pyenv.drop > /dev/null
+        pyenv.drop >/dev/null
         build_msg PYENV "[virtualenv] installing ${PY_ENV_REQ} into ${PY_ENV}"
 
         "${PYTHON}" -m venv "$@" "${PY_ENV}"
         "${PY_ENV_BIN}/python" -m pip install -U "${PIP_BOILERPLATE[@]}"
 
         for i in ${PY_ENV_REQ}; do
-            pip_req=( "${pip_req[@]}" "-r" "$i" )
+            pip_req=("${pip_req[@]}" "-r" "$i")
         done
 
         (
             [ "$VERBOSE" = "1" ] && set -x
             # shellcheck disable=SC2086
-            "${PY_ENV_BIN}/python" -m pip install "${pip_req[@]}" \
-                && sha256sum ${PY_ENV_REQ} > "${PY_ENV}/requirements.sha256"
+            "${PY_ENV_BIN}/python" -m pip install "${pip_req[@]}" &&
+                sha256sum ${PY_ENV_REQ} >"${PY_ENV}/requirements.sha256"
         )
     fi
     pyenv.OK
@@ -602,17 +621,17 @@ pyenv.OK() {
         return 1
     fi
 
-    if [ ! -f "${PY_ENV}/requirements.sha256" ] \
-        || ! sha256sum -c "${PY_ENV}/requirements.sha256" > /dev/null 2>&1; then
+    if [ ! -f "${PY_ENV}/requirements.sha256" ] ||
+        ! sha256sum -c "${PY_ENV}/requirements.sha256" >/dev/null 2>&1; then
         build_msg PYENV "[virtualenv] requirements.sha256 failed"
         sed 's/^/          [virtualenv] - /' <"${PY_ENV}/requirements.sha256"
         return 1
     fi
 
     if [ "$VERBOSE" = "1" ]; then
-        pyenv.check \
-            | "${PY_ENV_BIN}/python" 2>&1 \
-            | prefix_stdout "${_Blue}PYENV     ${_creset}[check] "
+        pyenv.check |
+            "${PY_ENV_BIN}/python" 2>&1 |
+            prefix_stdout "${_Blue}PYENV     ${_creset}[check] "
     else
         pyenv.check | "${PY_ENV_BIN}/python" 1>/dev/null
     fi
@@ -648,7 +667,7 @@ pyenv.check() {
         imp="$imp, $i"
     done
 
-    cat  <<EOF
+    cat <<EOF
 import ${imp#,*}
 
 EOF
@@ -657,16 +676,16 @@ EOF
 pyenv.install() {
 
     if ! pyenv.OK; then
-        py.clean > /dev/null
+        py.clean >/dev/null
     fi
-    if ! pyenv.install.OK > /dev/null; then
+    if ! pyenv.install.OK >/dev/null; then
         build_msg PYENV "[install] ${PYOBJECTS}"
         if ! pyenv.OK >/dev/null; then
             pyenv
         fi
         for i in ${PYOBJECTS}; do
-    	    build_msg PYENV "[install] pip install --use-pep517 --no-build-isolation -e '$i${PY_SETUP_EXTRAS}'"
-    	    "${PY_ENV_BIN}/python" -m pip install --use-pep517 --no-build-isolation -e "$i${PY_SETUP_EXTRAS}"
+            build_msg PYENV "[install] pip install --use-pep517 --no-build-isolation -e '$i${PY_SETUP_EXTRAS}'"
+            "${PY_ENV_BIN}/python" -m pip install --use-pep517 --no-build-isolation -e "$i${PY_SETUP_EXTRAS}"
         done
     fi
     pyenv.install.OK
@@ -708,19 +727,19 @@ pyenv.uninstall() {
     build_msg PYENV "[uninstall] ${PYOBJECTS}"
 
     if [ "." = "${PYOBJECTS}" ]; then
-	pyenv.cmd python setup.py develop --uninstall 2>&1 \
-            | prefix_stdout "${_Blue}PYENV     ${_creset}[pyenv.uninstall] "
+        pyenv.cmd python setup.py develop --uninstall 2>&1 |
+            prefix_stdout "${_Blue}PYENV     ${_creset}[pyenv.uninstall] "
     else
         # shellcheck disable=SC2086
-	pyenv.cmd python -m pip uninstall --yes ${PYOBJECTS} 2>&1 \
-            | prefix_stdout "${_Blue}PYENV     ${_creset}[pyenv.uninstall] "
+        pyenv.cmd python -m pip uninstall --yes ${PYOBJECTS} 2>&1 |
+            prefix_stdout "${_Blue}PYENV     ${_creset}[pyenv.uninstall] "
     fi
 }
 
-
 pyenv.cmd() {
     pyenv.install
-    (   set -e
+    (
+        set -e
         # shellcheck source=/dev/null
         source "${PY_ENV_BIN}/activate"
         [ "$VERBOSE" = "1" ] && set -x
@@ -728,14 +747,12 @@ pyenv.cmd() {
     )
 }
 
-
 pyenv.activate() {
     pyenv.install
     # shellcheck source=/dev/null
     source "${PY_ENV_BIN}/activate"
 }
 
-
 # Sphinx doc
 # ----------
 
@@ -750,18 +767,18 @@ docs.html() {
     # shellcheck disable=SC2086
     PATH="${PY_ENV_BIN}:${PATH}" pyenv.cmd sphinx-build \
         ${SPHINX_VERBOSE} ${SPHINXOPTS} \
-	-b html -c ./docs -d "${DOCS_BUILD}/.doctrees" ./docs "${DOCS_DIST}"
+        -b html -c ./docs -d "${DOCS_BUILD}/.doctrees" ./docs "${DOCS_DIST}"
     dump_return $?
 }
 
 docs.live() {
-    build_msg SPHINX  "autobuild ./docs --> file://$(readlink -e "$(pwd)/$DOCS_DIST")"
+    build_msg SPHINX "autobuild ./docs --> file://$(readlink -e "$(pwd)/$DOCS_DIST")"
     pyenv.install
     docs.prebuild
     # shellcheck disable=SC2086
     PATH="${PY_ENV_BIN}:${PATH}" pyenv.cmd sphinx-autobuild \
         ${SPHINX_VERBOSE} ${SPHINXOPTS} --open-browser --host 0.0.0.0 \
-	-b html -c ./docs -d "${DOCS_BUILD}/.doctrees" ./docs "${DOCS_DIST}"
+        -b html -c ./docs -d "${DOCS_BUILD}/.doctrees" ./docs "${DOCS_DIST}"
     dump_return $?
 }
 
@@ -804,25 +821,25 @@ docs.gh-pages() {
     (
         git worktree remove -f "${GH_PAGES}"
         git branch -D gh-pages
-    ) &> /dev/null  || true
+    ) &>/dev/null || true
     git worktree add --no-checkout "${GH_PAGES}" "${remote}/master"
 
-    pushd "${GH_PAGES}" &> /dev/null
+    pushd "${GH_PAGES}" &>/dev/null
     git checkout --orphan gh-pages
     git rm -rfq .
-    popd &> /dev/null
+    popd &>/dev/null
 
     cp -r "${DOCS_DIST}"/* "${GH_PAGES}"/
     touch "${GH_PAGES}/.nojekyll"
-    cat > "${GH_PAGES}/404.html" <<EOF
+    cat >"${GH_PAGES}/404.html" <<EOF
 <html><head><META http-equiv='refresh' content='0;URL=index.html'></head></html>
 EOF
 
-    pushd "${GH_PAGES}" &> /dev/null
+    pushd "${GH_PAGES}" &>/dev/null
     git add --all .
     git commit -q -m "gh-pages build from: ${branch}@${head} (${remote_url})"
     git push -f "${remote}" gh-pages
-    popd &> /dev/null
+    popd &>/dev/null
 
     set +x
     build_msg GH-PAGES "deployed"
@@ -850,7 +867,7 @@ drop_service_account() {
     fi
 }
 
-interactive_shell(){
+interactive_shell() {
 
     # usage:  interactive_shell "${SERVICE_USER}"
 
@@ -858,7 +875,6 @@ interactive_shell(){
     sudo -H -u "${1}" -i
 }
 
-
 # systemd
 # -------
 
@@ -883,7 +899,7 @@ systemd_remove_service() {
         return 42
     fi
     systemd_deactivate_service "${1}"
-    rm "${2}"  2>&1 | prefix_stdout
+    rm "${2}" 2>&1 | prefix_stdout
 }
 
 systemd_activate_service() {
@@ -927,7 +943,6 @@ systemctl status --no-pager ${1}.service
 EOF
 }
 
-
 # nginx
 # -----
 
@@ -945,14 +960,14 @@ nginx_distro_setup() {
     NGINX_APPS_AVAILABLE="/etc/nginx/default.apps-available"
 
     case $DIST_ID-$DIST_VERS in
-        ubuntu-*|debian-*)
+        ubuntu-* | debian-*)
             NGINX_PACKAGES="nginx"
             NGINX_DEFAULT_SERVER=/etc/nginx/sites-available/default
             ;;
         arch-*)
             NGINX_PACKAGES="nginx-mainline"
             ;;
-        fedora-*|centos-7)
+        fedora-* | centos-7)
             NGINX_PACKAGES="nginx"
             ;;
         *)
@@ -961,11 +976,11 @@ nginx_distro_setup() {
     esac
 }
 
-install_nginx(){
+install_nginx() {
     info_msg "installing nginx ..."
     pkg_install "${NGINX_PACKAGES}"
     case $DIST_ID-$DIST_VERS in
-        arch-*|fedora-*|centos-7)
+        arch-* | fedora-* | centos-7)
             systemctl enable nginx
             systemctl start nginx
             ;;
@@ -981,8 +996,8 @@ nginx_reload() {
     info_msg "reload nginx .."
     echo
     if ! nginx -t; then
-       err_msg "testing nginx configuration failed"
-       return 42
+        err_msg "testing nginx configuration failed"
+        return 42
     fi
     systemctl restart nginx
 }
@@ -998,16 +1013,16 @@ nginx_install_app() {
 
     for i in "$@"; do
         case $i in
-            -*) template_opts+=("$i");;
-            *)  pos_args+=("$i");;
+            -*) template_opts+=("$i") ;;
+            *) pos_args+=("$i") ;;
         esac
     done
 
     nginx_include_apps_enabled "${NGINX_DEFAULT_SERVER}"
 
     install_template "${template_opts[@]}" \
-                     "${NGINX_APPS_AVAILABLE}/${pos_args[1]}" \
-                     root root 644
+        "${NGINX_APPS_AVAILABLE}/${pos_args[1]}" \
+        root root 644
     nginx_enable_app "${pos_args[1]}"
     info_msg "installed nginx app: ${pos_args[1]}"
 }
@@ -1042,23 +1057,22 @@ nginx_include_apps_enabled() {
     (
         local line
         local stage=0
-        while IFS=  read -r line
-        do
+        while IFS= read -r line; do
             echo "$line"
-            if [[ $stage = 0 ]]; then
+            if [[ $stage == 0 ]]; then
                 if [[ $line =~ ^[[:space:]]*server*[[:space:]]*\{ ]]; then
                     stage=1
                 fi
             fi
 
-            if [[ $stage = 1 ]]; then
+            if [[ $stage == 1 ]]; then
                 echo "        # Load configuration files for the default server block."
                 echo "        $include_directive"
                 echo ""
                 stage=2
             fi
-        done < "${server_conf}.bak"
-    ) > "${server_conf}"
+        done <"${server_conf}.bak"
+    ) >"${server_conf}"
 
 }
 
@@ -1095,14 +1109,13 @@ nginx_disable_app() {
     nginx_reload
 }
 
-
 # Apache
 # ------
 
 apache_distro_setup() {
     # shellcheck disable=SC2034
     case $DIST_ID-$DIST_VERS in
-        ubuntu-*|debian-*)
+        ubuntu-* | debian-*)
             # debian uses the /etc/apache2 path, while other distros use
             # the apache default at /etc/httpd
             APACHE_SITES_AVAILABLE="/etc/apache2/sites-available"
@@ -1116,7 +1129,7 @@ apache_distro_setup() {
             APACHE_MODULES="modules"
             APACHE_PACKAGES="apache"
             ;;
-        fedora-*|centos-7)
+        fedora-* | centos-7)
             APACHE_SITES_AVAILABLE="/etc/httpd/sites-available"
             APACHE_SITES_ENABLED="/etc/httpd/sites-enabled"
             APACHE_MODULES="modules"
@@ -1128,13 +1141,13 @@ apache_distro_setup() {
     esac
 }
 
-install_apache(){
+install_apache() {
     info_msg "installing apache ..."
     pkg_install "$APACHE_PACKAGES"
     case $DIST_ID-$DIST_VERS in
-        arch-*|fedora-*|centos-7)
+        arch-* | fedora-* | centos-7)
             if ! grep "IncludeOptional sites-enabled" "/etc/httpd/conf/httpd.conf"; then
-                echo "IncludeOptional sites-enabled/*.conf" >> "/etc/httpd/conf/httpd.conf"
+                echo "IncludeOptional sites-enabled/*.conf" >>"/etc/httpd/conf/httpd.conf"
             fi
             systemctl enable httpd
             systemctl start httpd
@@ -1144,9 +1157,9 @@ install_apache(){
 
 apache_is_installed() {
     case $DIST_ID-$DIST_VERS in
-        ubuntu-*|debian-*) (command -v apachectl) &>/dev/null;;
-        arch-*) (command -v httpd) &>/dev/null;;
-        fedora-*|centos-7) (command -v httpd) &>/dev/null;;
+        ubuntu-* | debian-*) (command -v apachectl) &>/dev/null ;;
+        arch-*) (command -v httpd) &>/dev/null ;;
+        fedora-* | centos-7) (command -v httpd) &>/dev/null ;;
     esac
 }
 
@@ -1155,11 +1168,11 @@ apache_reload() {
     info_msg "reload apache .."
     echo
     case $DIST_ID-$DIST_VERS in
-        ubuntu-*|debian-*)
+        ubuntu-* | debian-*)
             sudo -H apachectl configtest
             sudo -H systemctl force-reload apache2
             ;;
-        arch-*|fedora-*|centos-7)
+        arch-* | fedora-* | centos-7)
             sudo -H httpd -t
             sudo -H systemctl force-reload httpd
             ;;
@@ -1177,14 +1190,14 @@ apache_install_site() {
 
     for i in "$@"; do
         case $i in
-            -*) template_opts+=("$i");;
-            *)  pos_args+=("$i");;
+            -*) template_opts+=("$i") ;;
+            *) pos_args+=("$i") ;;
         esac
     done
 
     install_template "${template_opts[@]}" \
-                     "${APACHE_SITES_AVAILABLE}/${pos_args[1]}" \
-                     root root 644
+        "${APACHE_SITES_AVAILABLE}/${pos_args[1]}" \
+        root root 644
     apache_enable_site "${pos_args[1]}"
     info_msg "installed apache site: ${pos_args[1]}"
 }
@@ -1207,7 +1220,7 @@ apache_enable_site() {
     info_msg "enable apache site: ${CONF}"
 
     case $DIST_ID-$DIST_VERS in
-        ubuntu-*|debian-*)
+        ubuntu-* | debian-*)
             sudo -H a2ensite -q "${CONF}"
             ;;
         arch-*)
@@ -1215,7 +1228,7 @@ apache_enable_site() {
             rm -f "${APACHE_SITES_ENABLED}/${CONF}"
             ln -s "${APACHE_SITES_AVAILABLE}/${CONF}" "${APACHE_SITES_ENABLED}/${CONF}"
             ;;
-        fedora-*|centos-7)
+        fedora-* | centos-7)
             mkdir -p "${APACHE_SITES_ENABLED}"
             rm -f "${APACHE_SITES_ENABLED}/${CONF}"
             ln -s "${APACHE_SITES_AVAILABLE}/${CONF}" "${APACHE_SITES_ENABLED}/${CONF}"
@@ -1233,13 +1246,13 @@ apache_disable_site() {
     info_msg "disable apache site: ${CONF}"
 
     case $DIST_ID-$DIST_VERS in
-        ubuntu-*|debian-*)
+        ubuntu-* | debian-*)
             sudo -H a2dissite -q "${CONF}"
             ;;
         arch-*)
             rm -f "${APACHE_SITES_ENABLED}/${CONF}"
             ;;
-        fedora-*|centos-7)
+        fedora-* | centos-7)
             rm -f "${APACHE_SITES_ENABLED}/${CONF}"
             ;;
     esac
@@ -1256,7 +1269,7 @@ uWSGI_SETUP="${uWSGI_SETUP:=/etc/uwsgi}"
 
 uWSGI_distro_setup() {
     case $DIST_ID-$DIST_VERS in
-        ubuntu-*|debian-*)
+        ubuntu-* | debian-*)
             # init.d --> /usr/share/doc/uwsgi/README.Debian.gz
             # For uWSGI debian uses the LSB init process, this might be changed
             # one day, see https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=833067
@@ -1273,7 +1286,7 @@ uWSGI_distro_setup() {
             uWSGI_APPS_ENABLED="${uWSGI_SETUP}"
             uWSGI_PACKAGES="uwsgi"
             ;;
-        fedora-*|centos-7)
+        fedora-* | centos-7)
             # systemd --> /usr/lib/systemd/system/uwsgi.service
             # Fedora runs uWSGI in emperor-tyrant mode: in Tyrant mode the
             # Emperor will run the vassal using the UID/GID of the vassal
@@ -1287,14 +1300,14 @@ uWSGI_distro_setup() {
         *)
             err_msg "$DIST_ID-$DIST_VERS: uWSGI not yet implemented"
             ;;
-esac
+    esac
 }
 
-install_uwsgi(){
+install_uwsgi() {
     info_msg "installing uwsgi ..."
     pkg_install "$uWSGI_PACKAGES"
     case $DIST_ID-$DIST_VERS in
-        fedora-*|centos-7)
+        fedora-* | centos-7)
             # enable & start should be called once at uWSGI installation time
             systemctl enable uwsgi
             systemctl restart uwsgi
@@ -1311,7 +1324,7 @@ uWSGI_restart() {
     [[ -z $CONF ]] && die_caller 42 "missing argument <myapp.ini>"
     info_msg "restart uWSGI service"
     case $DIST_ID-$DIST_VERS in
-        ubuntu-*|debian-*)
+        ubuntu-* | debian-*)
             # the 'service' method seems broken in that way, that it (re-)starts
             # the whole uwsgi process.
             service uwsgi restart "${CONF%.*}"
@@ -1324,7 +1337,7 @@ uWSGI_restart() {
                 info_msg "[uWSGI:systemd-template] ${CONF} not installed (no need to restart)"
             fi
             ;;
-        fedora-*|centos-7)
+        fedora-* | centos-7)
             # in emperor mode, just touch the file to restart
             if uWSGI_app_enabled "${CONF}"; then
                 touch "${uWSGI_APPS_ENABLED}/${CONF}"
@@ -1360,14 +1373,14 @@ uWSGI_install_app() {
 
     for i in "$@"; do
         case $i in
-            -*) template_opts+=("$i");;
-            *)  pos_args+=("$i");;
+            -*) template_opts+=("$i") ;;
+            *) pos_args+=("$i") ;;
         esac
     done
     mkdir -p "${uWSGI_APPS_AVAILABLE}"
     install_template "${template_opts[@]}" \
-                     "${uWSGI_APPS_AVAILABLE}/${pos_args[1]}" \
-                     "${pos_args[2]:-root}" "${pos_args[3]:-root}" "${pos_args[4]:-644}"
+        "${uWSGI_APPS_AVAILABLE}/${pos_args[1]}" \
+        "${pos_args[2]:-root}" "${pos_args[3]:-root}" "${pos_args[4]:-644}"
     uWSGI_enable_app "${pos_args[1]}"
     uWSGI_restart "${pos_args[1]}"
     info_msg "uWSGI app: ${pos_args[1]} is installed"
@@ -1394,7 +1407,7 @@ uWSGI_app_enabled() {
 
     [[ -z $CONF ]] && die_caller 42 "missing argument <myapp.ini>"
     case $DIST_ID-$DIST_VERS in
-        ubuntu-*|debian-*)
+        ubuntu-* | debian-*)
             [[ -f "${uWSGI_APPS_ENABLED}/${CONF}" ]]
             exit_val=$?
             ;;
@@ -1402,7 +1415,7 @@ uWSGI_app_enabled() {
             systemctl -q is-enabled "uwsgi@${CONF%.*}"
             exit_val=$?
             ;;
-        fedora-*|centos-7)
+        fedora-* | centos-7)
             [[ -f "${uWSGI_APPS_ENABLED}/${CONF}" ]]
             exit_val=$?
             ;;
@@ -1424,7 +1437,7 @@ uWSGI_enable_app() {
 
     [[ -z $CONF ]] && die_caller 42 "missing argument <myapp.ini>"
     case $DIST_ID-$DIST_VERS in
-        ubuntu-*|debian-*)
+        ubuntu-* | debian-*)
             mkdir -p "${uWSGI_APPS_ENABLED}"
             rm -f "${uWSGI_APPS_ENABLED}/${CONF}"
             ln -s "${uWSGI_APPS_AVAILABLE}/${CONF}" "${uWSGI_APPS_ENABLED}/${CONF}"
@@ -1437,7 +1450,7 @@ uWSGI_enable_app() {
             systemctl enable "uwsgi@${CONF%.*}"
             info_msg "enabled uWSGI app: ${CONF} (restart required)"
             ;;
-        fedora-*|centos-7)
+        fedora-* | centos-7)
             mkdir -p "${uWSGI_APPS_ENABLED}"
             rm -f "${uWSGI_APPS_ENABLED}/${CONF}"
             ln -s "${uWSGI_APPS_AVAILABLE}/${CONF}" "${uWSGI_APPS_ENABLED}/${CONF}"
@@ -1458,7 +1471,7 @@ uWSGI_disable_app() {
 
     [[ -z $CONF ]] && die_caller 42 "missing argument <myapp.ini>"
     case $DIST_ID-$DIST_VERS in
-        ubuntu-*|debian-*)
+        ubuntu-* | debian-*)
             service uwsgi stop "${CONF%.*}"
             rm -f "${uWSGI_APPS_ENABLED}/${CONF}"
             info_msg "disabled uWSGI app: ${CONF} (restart uWSGI required)"
@@ -1468,7 +1481,7 @@ uWSGI_disable_app() {
             systemctl disable "uwsgi@${CONF%.*}"
             rm -f "${uWSGI_APPS_ENABLED}/${CONF}"
             ;;
-        fedora-*|centos-7)
+        fedora-* | centos-7)
             # in emperor mode, just remove the app.ini file
             rm -f "${uWSGI_APPS_ENABLED}/${CONF}"
             ;;
@@ -1497,7 +1510,7 @@ pkg_install() {
         return 42
     fi
     case $DIST_ID in
-        ubuntu|debian)
+        ubuntu | debian)
             if [[ $_apt_pkg_info_is_updated == 0 ]]; then
                 export _apt_pkg_info_is_updated=1
                 apt update
@@ -1513,7 +1526,7 @@ pkg_install() {
             # shellcheck disable=SC2068
             dnf install -y $@
             ;;
-	centos)
+        centos)
             # shellcheck disable=SC2068
             yum install -y $@
             ;;
@@ -1533,7 +1546,7 @@ pkg_remove() {
         return 42
     fi
     case $DIST_ID in
-        ubuntu|debian)
+        ubuntu | debian)
             # shellcheck disable=SC2068
             apt-get purge --autoremove --ignore-missing -y $@
             ;;
@@ -1545,7 +1558,7 @@ pkg_remove() {
             # shellcheck disable=SC2068
             dnf remove -y $@
             ;;
-	centos)
+        centos)
             # shellcheck disable=SC2068
             yum remove -y $@
             ;;
@@ -1557,20 +1570,20 @@ pkg_is_installed() {
     # usage: pkg_is_install foopkg || pkg_install foopkg
 
     case $DIST_ID in
-        ubuntu|debian)
-            dpkg -l "$1" &> /dev/null
+        ubuntu | debian)
+            dpkg -l "$1" &>/dev/null
             return $?
             ;;
         arch)
-            pacman -Qsq "$1" &> /dev/null
+            pacman -Qsq "$1" &>/dev/null
             return $?
             ;;
         fedora)
-            dnf list -q --installed "$1" &> /dev/null
+            dnf list -q --installed "$1" &>/dev/null
             return $?
             ;;
-	centos)
-            yum list -q --installed "$1" &> /dev/null
+        centos)
+            yum list -q --installed "$1" &>/dev/null
             return $?
             ;;
     esac
@@ -1601,24 +1614,24 @@ git_clone() {
     local bash_cmd="bash"
     local remote="origin"
 
-    if [[ ! "${dest:0:1}" = "/" ]]; then
+    if [[ ${dest:0:1} != "/" ]]; then
         dest="$CACHE/$dest"
     fi
 
     [[ -z $branch ]] && branch=master
-    [[ -z $user ]] && [[ -n "${SUDO_USER}" ]] && user="${SUDO_USER}"
+    [[ -z $user ]] && [[ -n ${SUDO_USER} ]] && user="${SUDO_USER}"
     [[ -n $user ]] && bash_cmd="sudo -H -u $user -i"
 
-    if [[ -d "${dest}" ]] ; then
+    if [[ -d ${dest} ]]; then
         info_msg "already cloned: $dest"
-        tee_stderr 0.1 <<EOF | $bash_cmd 2>&1 |  prefix_stdout "  ${_Yellow}|$user|${_creset} "
+        tee_stderr 0.1 <<EOF | $bash_cmd 2>&1 | prefix_stdout "  ${_Yellow}|$user|${_creset} "
 cd "${dest}"
 git checkout -m -B "$branch" --track "$remote/$branch"
 git pull --all
 EOF
     else
         info_msg "clone into: $dest"
-        tee_stderr 0.1 <<EOF | $bash_cmd 2>&1 |  prefix_stdout "  ${_Yellow}|$user|${_creset} "
+        tee_stderr 0.1 <<EOF | $bash_cmd 2>&1 | prefix_stdout "  ${_Yellow}|$user|${_creset} "
 mkdir -p "$(dirname "$dest")"
 cd "$(dirname "$dest")"
 git clone --branch "$branch" --origin "$remote" "$url" "$(basename "$dest")"
@@ -1684,10 +1697,10 @@ LXC_BASE_PACKAGES_centos="bash git python3"
 
 lxc_distro_setup() {
     case $DIST_ID in
-        ubuntu|debian) LXC_BASE_PACKAGES="${LXC_BASE_PACKAGES_debian}" ;;
-        arch)          LXC_BASE_PACKAGES="${LXC_BASE_PACKAGES_arch}" ;;
-        fedora)        LXC_BASE_PACKAGES="${LXC_BASE_PACKAGES_fedora}" ;;
-        centos)        LXC_BASE_PACKAGES="${LXC_BASE_PACKAGES_centos}" ;;
+        ubuntu | debian) LXC_BASE_PACKAGES="${LXC_BASE_PACKAGES_debian}" ;;
+        arch) LXC_BASE_PACKAGES="${LXC_BASE_PACKAGES_arch}" ;;
+        fedora) LXC_BASE_PACKAGES="${LXC_BASE_PACKAGES_fedora}" ;;
+        centos) LXC_BASE_PACKAGES="${LXC_BASE_PACKAGES_centos}" ;;
         *) err_msg "$DIST_ID-$DIST_VERS: pkg_install LXC_BASE_PACKAGES not yet implemented" ;;
     esac
 }
@@ -1695,24 +1708,23 @@ lxc_distro_setup() {
 lxc_install_base_packages() {
     info_msg "install LXC_BASE_PACKAGES in container $1"
     case $DIST_ID in
-        centos) yum groupinstall "Development Tools" -y  ;;
+        centos) yum groupinstall "Development Tools" -y ;;
     esac
     pkg_install "${LXC_BASE_PACKAGES}"
 }
 
-
 lxc_image_copy() {
 
     # usage: lxc_image_copy <remote image> <local image>
     #
     #        lxc_image_copy "images:ubuntu/20.04"  "ubu2004"
 
-    if lxc_image_exists "local:${LXC_SUITE[i+1]}"; then
-        info_msg "image ${LXC_SUITE[i]} already copied --> ${LXC_SUITE[i+1]}"
+    if lxc_image_exists "local:${LXC_SUITE[i + 1]}"; then
+        info_msg "image ${LXC_SUITE[i]} already copied --> ${LXC_SUITE[i + 1]}"
     else
-        info_msg "copy image locally ${LXC_SUITE[i]} --> ${LXC_SUITE[i+1]}"
+        info_msg "copy image locally ${LXC_SUITE[i]} --> ${LXC_SUITE[i + 1]}"
         lxc image copy "${LXC_SUITE[i]}" local: \
-            --alias  "${LXC_SUITE[i+1]}" | prefix_stdout
+            --alias "${LXC_SUITE[i + 1]}" | prefix_stdout
     fi
 }
 
@@ -1731,14 +1743,14 @@ lxc_init_container() {
     fi
 }
 
-lxc_exists(){
+lxc_exists() {
 
     # usage: lxc_exists <name> || echo "container <name> does not exists"
 
     lxc info "$1" &>/dev/null
 }
 
-lxc_image_exists(){
+lxc_image_exists() {
     # usage: lxc_image_exists <alias> || echo "image <alias> does locally not exists"
 
     lxc image info "local:$1" &>/dev/null
@@ -1766,11 +1778,10 @@ lxc_delete_local_image() {
     lxc image delete "local:$i"
 }
 
-
 # IP
 # --
 
-global_IPs(){
+global_IPs() {
     # usage: global_IPS
     #
     # print list of host's SCOPE global addresses and adapters e.g::
@@ -1787,18 +1798,18 @@ primary_ip() {
 
     case $DIST_ID in
         arch)
-            ip -o addr show \
-                | sed -nr 's/[0-9]*:\s*([a-z0-9]*).*inet[6]?\s*([a-z0-9.:]*).*scope global.*/\2/p' \
-                | head -n 1
+            ip -o addr show |
+                sed -nr 's/[0-9]*:\s*([a-z0-9]*).*inet[6]?\s*([a-z0-9.:]*).*scope global.*/\2/p' |
+                head -n 1
             ;;
-        *)  hostname -I | cut -d' ' -f1 ;;
+        *) hostname -I | cut -d' ' -f1 ;;
     esac
 }
 
 # URL
 # ---
 
-url_replace_hostname(){
+url_replace_hostname() {
 
     # usage:  url_replace_hostname <url> <new hostname>
 
diff --git a/utils/lib_go.sh b/utils/lib_go.sh
index 06522f005..02dc8f7e6 100755
--- a/utils/lib_go.sh
+++ b/utils/lib_go.sh
@@ -23,14 +23,14 @@
 # configure golang environment
 # ----------------------------
 
-[[ -z "${GO_VERSION}" ]] && GO_VERSION="go1.17.3"
+[[ -z ${GO_VERSION} ]] && GO_VERSION="go1.17.3"
 
 GO_DL_URL="https://golang.org/dl"
 
 # implement go functions
 # -----------------------
 
-go.help(){
+go.help() {
     cat <<EOF
 go.:
   ls        : list golang binary archives (stable)
@@ -40,7 +40,7 @@ go.:
 EOF
 }
 
-go.ls(){
+go.ls() {
     python <<EOF
 import sys, json, requests
 resp = requests.get("${GO_DL_URL}/?mode=json&include=all")
@@ -54,7 +54,7 @@ for ver in json.loads(resp.text):
 EOF
 }
 
-go.ver_info(){
+go.ver_info() {
 
     # print information about a golang distribution. To print filename
     # sha256 and size of the archive that fits to your OS and host:
@@ -84,15 +84,15 @@ EOF
 }
 
 go.os() {
-  local OS
-  case "$(command uname -a)xx" in
-    Linux\ *) OS=linux ;;
-    Darwin\ *) OS=darwin ;;
-    FreeBSD\ *) OS=freebsd ;;
-    CYGWIN* | MSYS* | MINGW*) OS=windows ;;
-    *)  die 42 "OS is unknown: $(command uname -a)" ;;
-  esac
-  echo "${OS}"
+    local OS
+    case "$(command uname -a)xx" in
+        Linux\ *) OS=linux ;;
+        Darwin\ *) OS=darwin ;;
+        FreeBSD\ *) OS=freebsd ;;
+        CYGWIN* | MSYS* | MINGW*) OS=windows ;;
+        *) die 42 "OS is unknown: $(command uname -a)" ;;
+    esac
+    echo "${OS}"
 }
 
 go.arch() {
@@ -104,7 +104,7 @@ go.arch() {
         "armv8") ARCH=arm64 ;;
         .*386.*) ARCH=386 ;;
         ppc64*) ARCH=ppc64le ;;
-    *)  die 42 "ARCH is unknown: $(command uname -m)" ;;
+        *) die 42 "ARCH is unknown: $(command uname -m)" ;;
     esac
     echo "${ARCH}"
 }
@@ -140,14 +140,14 @@ go.golang() {
     info_msg "Download go binary ${fname} (${size}B)"
     cache_download "${GO_DL_URL}/${fname}" "${fname}"
 
-    pushd "${CACHE}" &> /dev/null
-    echo "${sha}  ${fname}" > "${fname}.sha256"
+    pushd "${CACHE}" &>/dev/null
+    echo "${sha}  ${fname}" >"${fname}.sha256"
     if ! sha256sum -c "${fname}.sha256" >/dev/null; then
         die 42 "downloaded file ${fname} checksum does not match"
     else
         info_msg "${fname} checksum OK"
     fi
-    popd &> /dev/null
+    popd &>/dev/null
 
     info_msg "install golang"
     tee_stderr 0.1 <<EOF | sudo -i -u "${user}" | prefix_stdout "${userpr}"
@@ -201,7 +201,7 @@ go.bash() {
     sudo -i -u "${user}" bash --init-file "~${user}/.go_env"
 }
 
-go.version(){
+go.version() {
     local user
     user="${1:-${USERNAME}}"
     sudo -i -u "${user}" <<EOF
diff --git a/utils/lib_nvm.sh b/utils/lib_nvm.sh
index 30f7781d7..4ed451a36 100755
--- a/utils/lib_nvm.sh
+++ b/utils/lib_nvm.sh
@@ -17,8 +17,8 @@ declare main_cmd
 
 NVM_LOCAL_FOLDER=.nvm
 
-[[ -z "${NVM_GIT_URL}" ]] &&  NVM_GIT_URL="https://github.com/nvm-sh/nvm.git"
-[[ -z "${NVM_MIN_NODE_VER}" ]] && NVM_MIN_NODE_VER="16.13.0"
+[[ -z ${NVM_GIT_URL} ]] && NVM_GIT_URL="https://github.com/nvm-sh/nvm.git"
+[[ -z ${NVM_MIN_NODE_VER} ]] && NVM_MIN_NODE_VER="16.13.0"
 
 # initialize nvm environment
 # -------------------------
@@ -35,7 +35,7 @@ nvm.is_installed() {
     [[ -f "${NVM_DIR}/nvm.sh" ]]
 }
 
-if [[ -z "${NVM_DIR}" ]]; then
+if [[ -z ${NVM_DIR} ]]; then
     # nvm is not pre-installed in $HOME.  Prepare for using nvm from <repo-root>
     NVM_DIR="$(git rev-parse --show-toplevel)/${NVM_LOCAL_FOLDER}"
 fi
@@ -105,7 +105,7 @@ nvm.install() {
     info_msg "install (update) NVM at ${NVM_DIR}"
     if nvm.is_installed; then
         info_msg "already cloned at: ${NVM_DIR}"
-        pushd "${NVM_DIR}" &> /dev/null
+        pushd "${NVM_DIR}" &>/dev/null
         git fetch --all | prefix_stdout "  ${_Yellow}||${_creset} "
     else
         # delete any leftovers from previous installations
@@ -114,14 +114,14 @@ nvm.install() {
         fi
         info_msg "clone: ${NVM_GIT_URL}"
         git clone "${NVM_GIT_URL}" "${NVM_DIR}" 2>&1 | prefix_stdout "  ${_Yellow}||${_creset} "
-        pushd "${NVM_DIR}" &> /dev/null
+        pushd "${NVM_DIR}" &>/dev/null
         git config --local advice.detachedHead false
     fi
     NVM_VERSION_TAG="$(git rev-list --tags --max-count=1)"
     NVM_VERSION_TAG="$(git describe --abbrev=0 --tags --match "v[0-9]*" "${NVM_VERSION_TAG}")"
     info_msg "checkout ${NVM_VERSION_TAG}"
     git checkout "${NVM_VERSION_TAG}" 2>&1 | prefix_stdout "  ${_Yellow}||${_creset} "
-    popd &> /dev/null
+    popd &>/dev/null
     if [ -f "${REPO_ROOT}/.nvm_packages" ]; then
         cp "${REPO_ROOT}/.nvm_packages" "${NVM_DIR}/default-packages"
     fi
diff --git a/utils/lib_redis.sh b/utils/lib_redis.sh
index 3b481dc75..5b12d8d07 100755
--- a/utils/lib_redis.sh
+++ b/utils/lib_redis.sh
@@ -12,7 +12,7 @@ REDIS_GROUP="searxng-redis"
 REDIS_SERVICE_NAME="searxng-redis"
 REDIS_SYSTEMD_UNIT="${SYSTEMD_UNITS}/${REDIS_SERVICE_NAME}.service"
 
-redis.help(){
+redis.help() {
     cat <<EOF
 redis.:
   remove    : delete user (${REDIS_USER}) and remove service (${REDIS_SERVICE_NAME})
@@ -21,7 +21,6 @@ redis.:
 EOF
 }
 
-
 redis.remove() {
     sudo_or_exit
     (
@@ -36,7 +35,6 @@ redis.shell() {
     interactive_shell "${REDIS_USER}"
 }
 
-
 redis.userdel() {
     sudo_or_exit
     drop_service_account "${REDIS_USER}"
diff --git a/utils/lib_sxng_container.sh b/utils/lib_sxng_container.sh
index 9abed5afb..8bc3cdbfc 100644
--- a/utils/lib_sxng_container.sh
+++ b/utils/lib_sxng_container.sh
@@ -41,28 +41,28 @@ container.build() {
 
     # Setup arch specific
     case $parch in
-    "X64" | "x86_64" | "amd64")
-        dockerfile="Dockerfile"
-        arch="amd64"
-        variant=""
-        platform="linux/$arch"
-        ;;
-    "ARM64" | "aarch64" | "arm64")
-        dockerfile="Dockerfile"
-        arch="arm64"
-        variant=""
-        platform="linux/$arch"
-        ;;
-    "ARMV7" | "armhf" | "armv7l" | "armv7")
-        dockerfile="Dockerfile"
-        arch="arm"
-        variant="v7"
-        platform="linux/$arch/$variant"
-        ;;
-    *)
-        err_msg "Unsupported architecture; $parch"
-        exit 1
-        ;;
+        "X64" | "x86_64" | "amd64")
+            dockerfile="Dockerfile"
+            arch="amd64"
+            variant=""
+            platform="linux/$arch"
+            ;;
+        "ARM64" | "aarch64" | "arm64")
+            dockerfile="Dockerfile"
+            arch="arm64"
+            variant=""
+            platform="linux/$arch"
+            ;;
+        "ARMV7" | "armhf" | "armv7l" | "armv7")
+            dockerfile="Dockerfile"
+            arch="arm"
+            variant="v7"
+            platform="linux/$arch/$variant"
+            ;;
+        *)
+            err_msg "Unsupported architecture; $parch"
+            exit 1
+            ;;
     esac
     info_msg "Selected platform: $platform"
 
@@ -117,7 +117,7 @@ container.build() {
             --tag="localhost/$CONTAINER_IMAGE_ORGANIZATION/$CONTAINER_IMAGE_NAME:builder" \
             --file="./container/$dockerfile" \
             .
-        build_msg CONTAINER "Image \"builder\" built"
+        build_msg CONTAINER 'Image "builder" built'
 
         # shellcheck disable=SC2086
         "$container_engine" $params_build \
@@ -161,25 +161,25 @@ container.test() {
 
     # Setup arch specific
     case $parch in
-    "X64" | "x86_64" | "amd64")
-        arch="amd64"
-        variant=""
-        platform="linux/$arch"
-        ;;
-    "ARM64" | "aarch64" | "arm64")
-        arch="arm64"
-        variant=""
-        platform="linux/$arch"
-        ;;
-    "ARMV7" | "armhf" | "armv7l" | "armv7")
-        arch="arm"
-        variant="v7"
-        platform="linux/$arch/$variant"
-        ;;
-    *)
-        err_msg "Unsupported architecture; $parch"
-        exit 1
-        ;;
+        "X64" | "x86_64" | "amd64")
+            arch="amd64"
+            variant=""
+            platform="linux/$arch"
+            ;;
+        "ARM64" | "aarch64" | "arm64")
+            arch="arm64"
+            variant=""
+            platform="linux/$arch"
+            ;;
+        "ARMV7" | "armhf" | "armv7l" | "armv7")
+            arch="arm"
+            variant="v7"
+            platform="linux/$arch/$variant"
+            ;;
+        *)
+            err_msg "Unsupported architecture; $parch"
+            exit 1
+            ;;
     esac
     build_msg CONTAINER "Selected platform: $platform"
 
@@ -224,25 +224,25 @@ container.push() {
 
     for arch in "${release_archs[@]}"; do
         case $arch in
-        "X64" | "x86_64" | "amd64")
-            archs+=("amd64")
-            variants+=("")
-            platforms+=("linux/${archs[-1]}")
-            ;;
-        "ARM64" | "aarch64" | "arm64")
-            archs+=("arm64")
-            variants+=("")
-            platforms+=("linux/${archs[-1]}")
-            ;;
-        "ARMV7" | "armv7" | "armhf" | "arm")
-            archs+=("arm")
-            variants+=("v7")
-            platforms+=("linux/${archs[-1]}/${variants[-1]}")
-            ;;
-        *)
-            err_msg "Unsupported architecture; $arch"
-            exit 1
-            ;;
+            "X64" | "x86_64" | "amd64")
+                archs+=("amd64")
+                variants+=("")
+                platforms+=("linux/${archs[-1]}")
+                ;;
+            "ARM64" | "aarch64" | "arm64")
+                archs+=("arm64")
+                variants+=("")
+                platforms+=("linux/${archs[-1]}")
+                ;;
+            "ARMV7" | "armv7" | "armhf" | "arm")
+                archs+=("arm")
+                variants+=("v7")
+                platforms+=("linux/${archs[-1]}/${variants[-1]}")
+                ;;
+            *)
+                err_msg "Unsupported architecture; $arch"
+                exit 1
+                ;;
         esac
     done
 
diff --git a/utils/lib_sxng_data.sh b/utils/lib_sxng_data.sh
index d24668146..550357fcd 100755
--- a/utils/lib_sxng_data.sh
+++ b/utils/lib_sxng_data.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
-data.help(){
+data.help() {
     cat <<EOF
 data.:
   all       : update searx/sxng_locales.py and searx/data/*
@@ -13,12 +13,13 @@ EOF
 }
 
 data.all() {
-    (   set -e
+    (
+        set -e
 
         pyenv.activate
         data.traits
         data.useragents
-	data.locales
+        data.locales
 
         build_msg DATA "update searx/data/osm_keys_tags.json"
         pyenv.cmd python searxng_extra/update/update_osm_keys_tags.py
@@ -35,9 +36,9 @@ data.all() {
     )
 }
 
-
 data.traits() {
-    (   set -e
+    (
+        set -e
         pyenv.activate
         build_msg DATA "update searx/data/engine_traits.json"
         python searxng_extra/update/update_engine_traits.py
@@ -53,7 +54,8 @@ data.useragents() {
 }
 
 data.locales() {
-    (   set -e
+    (
+        set -e
         pyenv.activate
         build_msg DATA "update searx/data/locales.json"
         python searxng_extra/update/update_locales.py
@@ -61,8 +63,9 @@ data.locales() {
     dump_return $?
 }
 
-data.currencies(){
-    (   set -e
+data.currencies() {
+    (
+        set -e
         pyenv.activate
         build_msg DATA "update searx/data/currencies.json"
         python searxng_extra/update/update_currencies.py
diff --git a/utils/lib_sxng_node.sh b/utils/lib_sxng_node.sh
index 4ca51324d..c072dd40d 100755
--- a/utils/lib_sxng_node.sh
+++ b/utils/lib_sxng_node.sh
@@ -6,7 +6,7 @@ declare _creset
 
 export NODE_MINIMUM_VERSION="18.17.0"
 
-node.help(){
+node.help() {
     cat <<EOF
 node.:
   env       : download & install SearXNG's npm dependencies locally
@@ -24,7 +24,8 @@ nodejs.ensure() {
 
 node.env() {
     nodejs.ensure
-    (   set -e
+    (
+        set -e
         build_msg INSTALL "[npm] ./client/simple/package.json"
         npm --prefix client/simple install
     )
@@ -43,20 +44,22 @@ node.clean() {
         return 0
     fi
     build_msg CLEAN "themes -- locally installed npm dependencies"
-    (   set -e
-        npm --prefix client/simple run clean \
-	    | prefix_stdout "${_Blue}CLEAN    ${_creset} "
-	if [ "${PIPESTATUS[0]}" -ne "0" ]; then
+    (
+        set -e
+        npm --prefix client/simple run clean |
+            prefix_stdout "${_Blue}CLEAN    ${_creset} "
+        if [ "${PIPESTATUS[0]}" -ne "0" ]; then
             return 1
-	fi
+        fi
     )
     build_msg CLEAN "locally installed developer and CI tools"
-    (   set -e
-        npm --prefix . run clean \
-	    | prefix_stdout "${_Blue}CLEAN    ${_creset} "
-	if [ "${PIPESTATUS[0]}" -ne "0" ]; then
+    (
+        set -e
+        npm --prefix . run clean |
+            prefix_stdout "${_Blue}CLEAN    ${_creset} "
+        if [ "${PIPESTATUS[0]}" -ne "0" ]; then
             return 1
-	fi
+        fi
     )
     dump_return $?
 }
diff --git a/utils/lib_sxng_static.sh b/utils/lib_sxng_static.sh
index 43af38d0f..1ef58f9a9 100755
--- a/utils/lib_sxng_static.sh
+++ b/utils/lib_sxng_static.sh
@@ -1,7 +1,6 @@
 #!/usr/bin/env bash
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
-
 STATIC_BUILD_COMMIT="[build] /static"
 STATIC_BUILT_PATHS=(
     'searx/templates/simple/icons.html'
@@ -9,7 +8,7 @@ STATIC_BUILT_PATHS=(
     'client/simple/package-lock.json'
 )
 
-static.help(){
+static.help() {
     cat <<EOF
 static.build.:  ${STATIC_BUILD_COMMIT}
   commit    : build & commit /static folder
@@ -57,8 +56,8 @@ static.build.drop() {
 
     # get only last (option -n1) local commit not in remotes
     branch="$(git branch --show-current)"
-    last_commit_id="$(git log -n1 "${branch}" --pretty=format:'%h'\
-     --not --exclude="${branch}" --branches --remotes)"
+    last_commit_id="$(git log -n1 "${branch}" --pretty=format:'%h' \
+        --not --exclude="${branch}" --branches --remotes)"
 
     if [ -z "${last_commit_id}" ]; then
         err_msg "there are no local commits"
@@ -96,7 +95,8 @@ static.build.commit() {
     # drop existing commit from previous build
     static.build.drop &>/dev/null
 
-    (   set -e
+    (
+        set -e
         # fix & build the themes
         themes.fix
         themes.lint
diff --git a/utils/lib_sxng_test.sh b/utils/lib_sxng_test.sh
index 3f610f9f3..a0f810f8d 100755
--- a/utils/lib_sxng_test.sh
+++ b/utils/lib_sxng_test.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
-test.help(){
+test.help() {
     cat <<EOF
 test.:
   yamllint  : lint YAML files (YAMLLINT_FILES)
@@ -22,13 +22,14 @@ if [ "$VERBOSE" = "1" ]; then
 fi
 
 test.yamllint() {
-    build_msg TEST "[yamllint] \$YAMLLINT_FILES"
+    build_msg TEST "[yamllint] ${YAMLLINT_FILES[*]}"
     pyenv.cmd yamllint --strict --format parsable "${YAMLLINT_FILES[@]}"
     dump_return $?
 }
 
 test.pylint() {
-    (   set -e
+    (
+        set -e
         pyenv.activate
         PYLINT_OPTIONS="--rcfile .pylintrc"
 
@@ -41,10 +42,10 @@ test.pylint() {
         build_msg TEST "[pylint] ./searx ./searxng_extra ./tests"
         # shellcheck disable=SC2086
         pylint ${PYLINT_OPTIONS} ${PYLINT_VERBOSE} \
-               --ignore=searx/engines \
-               searx searx/searxng.msg \
-               searxng_extra searxng_extra/docs_prebuild \
-               tests
+            --ignore=searx/engines \
+            searx searx/searxng.msg \
+            searxng_extra searxng_extra/docs_prebuild \
+            tests
     )
     dump_return $?
 }
@@ -63,13 +64,13 @@ test.types.dev() {
     build_msg TEST "[pyright/types] suppress warnings related to intentional monkey patching"
     # We run Pyright in the virtual environment because pyright executes
     # "python" to determine the Python version.
-    pyenv.cmd npx --no-install pyright -p pyrightconfig.json \
-        | grep -E '\.py:[0-9]+:[0-9]+'\
-        | grep -v '/engines/.*.py.* - warning: "logger" is not defined'\
-        | grep -v '/plugins/.*.py.* - error: "logger" is not defined'\
-        | grep -v '/engines/.*.py.* - warning: "supported_languages" is not defined' \
-        | grep -v '/engines/.*.py.* - warning: "language_aliases" is not defined' \
-        | grep -v '/engines/.*.py.* - warning: "categories" is not defined'
+    pyenv.cmd npx --no-install pyright -p pyrightconfig.json |
+        grep -E '\.py:[0-9]+:[0-9]+' |
+        grep -v '/engines/.*.py.* - warning: "logger" is not defined' |
+        grep -v '/plugins/.*.py.* - error: "logger" is not defined' |
+        grep -v '/engines/.*.py.* - warning: "supported_languages" is not defined' |
+        grep -v '/engines/.*.py.* - warning: "language_aliases" is not defined' |
+        grep -v '/engines/.*.py.* - warning: "categories" is not defined'
     # ignore exit value from pyright
     # dump_return ${PIPESTATUS[0]}
     return 0
@@ -88,13 +89,13 @@ test.types.ci() {
     build_msg TEST "[pyright] suppress warnings related to intentional monkey patching"
     # We run Pyright in the virtual environment because pyright executes
     # "python" to determine the Python version.
-    pyenv.cmd npx --no-install pyright -p pyrightconfig-ci.json \
-        | grep -E '\.py:[0-9]+:[0-9]+'\
-        | grep -v '/engines/.*.py.* - warning: "logger" is not defined'\
-        | grep -v '/plugins/.*.py.* - error: "logger" is not defined'\
-        | grep -v '/engines/.*.py.* - warning: "supported_languages" is not defined' \
-        | grep -v '/engines/.*.py.* - warning: "language_aliases" is not defined' \
-        | grep -v '/engines/.*.py.* - warning: "categories" is not defined'
+    pyenv.cmd npx --no-install pyright -p pyrightconfig-ci.json |
+        grep -E '\.py:[0-9]+:[0-9]+' |
+        grep -v '/engines/.*.py.* - warning: "logger" is not defined' |
+        grep -v '/plugins/.*.py.* - error: "logger" is not defined' |
+        grep -v '/engines/.*.py.* - warning: "supported_languages" is not defined' |
+        grep -v '/engines/.*.py.* - warning: "language_aliases" is not defined' |
+        grep -v '/engines/.*.py.* - warning: "categories" is not defined'
     # ignore exit value from pyright
     # dump_return ${PIPESTATUS[0]}
     return 0
@@ -121,7 +122,8 @@ test.unit() {
 
 test.coverage() {
     build_msg TEST 'unit test coverage'
-    (   set -e
+    (
+        set -e
         pyenv.activate
         # shellcheck disable=SC2086
         python -m nose2 ${TEST_NOSE2_VERBOSE} -C --log-capture --with-coverage --coverage searx -s tests/unit
@@ -142,7 +144,7 @@ test.rst() {
     build_msg TEST "[reST markup] ${RST_FILES[*]}"
 
     for rst in "${RST_FILES[@]}"; do
-        pyenv.cmd rst2html --halt error "$rst" > /dev/null || die 42 "fix issue in $rst"
+        pyenv.cmd rst2html --halt error "$rst" >/dev/null || die 42 "fix issue in $rst"
     done
 }
 
@@ -160,7 +162,7 @@ test.pybabel() {
 }
 
 test.clean() {
-    build_msg CLEAN  "test stuff"
+    build_msg CLEAN "test stuff"
     rm -rf geckodriver.log .coverage coverage/
     dump_return $?
 }
diff --git a/utils/lib_sxng_themes.sh b/utils/lib_sxng_themes.sh
index 542ac265d..c707db88c 100755
--- a/utils/lib_sxng_themes.sh
+++ b/utils/lib_sxng_themes.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
-themes.help(){
+themes.help() {
     cat <<EOF
 themes.:
   all       : test & build all themes
@@ -13,14 +13,16 @@ EOF
 }
 
 themes.all() {
-    (   set -e
+    (
+        set -e
         vite.simple.build
     )
     dump_return $?
 }
 
 themes.simple() {
-    (   set -e
+    (
+        set -e
         build_msg SIMPLE "theme: run build (simple)"
         vite.simple.build
     )
@@ -28,7 +30,8 @@ themes.simple() {
 }
 
 themes.fix() {
-    (   set -e
+    (
+        set -e
         build_msg SIMPLE "theme: fix (all themes)"
         vite.simple.fix
     )
@@ -36,7 +39,8 @@ themes.fix() {
 }
 
 themes.lint() {
-    (   set -e
+    (
+        set -e
         build_msg SIMPLE "theme: lint (all themes)"
         vite.simple.lint
     )
@@ -44,7 +48,8 @@ themes.lint() {
 }
 
 themes.test() {
-    (   set -e
+    (
+        set -e
         # we run a build to test (in CI)
         build_msg SIMPLE "theme: run build (to test)"
         vite.simple.build
diff --git a/utils/lib_sxng_vite.sh b/utils/lib_sxng_vite.sh
index bb6a881cc..125b01385 100644
--- a/utils/lib_sxng_vite.sh
+++ b/utils/lib_sxng_vite.sh
@@ -4,7 +4,7 @@
 declare _Blue
 declare _creset
 
-vite.help(){
+vite.help() {
     cat <<EOF
 vite.:  .. to be done ..
   simple.:
@@ -30,7 +30,8 @@ VITE_SIMPLE_THEME="${REPO_ROOT}/client/simple"
 # }
 
 vite.simple.build() {
-    (   set -e
+    (
+        set -e
         templates.simple.pygments
 
         node.env
@@ -39,19 +40,21 @@ vite.simple.build() {
         pushd "${VITE_SIMPLE_THEME}"
         npm install
         npm run build
-        popd &> /dev/null
+        popd &>/dev/null
     )
 }
 
 vite.simple.fix() {
-    (   set -e
+    (
+        set -e
         node.env
         npm --prefix client/simple run fix
     )
 }
 
 vite.simple.lint() {
-    (   set -e
+    (
+        set -e
         node.env
         npm --prefix client/simple run lint
     )
@@ -59,8 +62,8 @@ vite.simple.lint() {
 
 templates.simple.pygments() {
     build_msg PYGMENTS "searxng_extra/update/update_pygments.py"
-    pyenv.cmd python searxng_extra/update/update_pygments.py \
-        | prefix_stdout "${_Blue}PYGMENTS ${_creset} "
+    pyenv.cmd python searxng_extra/update/update_pygments.py |
+        prefix_stdout "${_Blue}PYGMENTS ${_creset} "
     if [ "${PIPESTATUS[0]}" -ne "0" ]; then
         build_msg PYGMENTS "building LESS files for pygments failed"
         return 1
diff --git a/utils/lib_sxng_weblate.sh b/utils/lib_sxng_weblate.sh
index 3486fa0eb..e4d041d8b 100755
--- a/utils/lib_sxng_weblate.sh
+++ b/utils/lib_sxng_weblate.sh
@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
-weblate.help(){
+weblate.help() {
     cat <<EOF
 weblate.:
   push.translations: push translation changes from SearXNG to Weblate's counterpart
@@ -19,8 +19,9 @@ weblate.translations.worktree() {
     #
     #     remote weblate https://translate.codeberg.org/git/searxng/searxng/
 
-    (   set -e
-        if ! git remote get-url weblate 2> /dev/null; then
+    (
+        set -e
+        if ! git remote get-url weblate 2>/dev/null; then
             git remote add weblate https://translate.codeberg.org/git/searxng/searxng/
         fi
         if [ -d "${TRANSLATIONS_WORKTREE}" ]; then
@@ -49,7 +50,8 @@ weblate.to.translations() {
     # 4. In translations worktree, merge changes of branch 'translations' from
     #    remote 'weblate' and push it on branch 'translations' of 'origin'
 
-    (   set -e
+    (
+        set -e
         pyenv.activate
         if [ "$(wlc lock-status)" != "locked: True" ]; then
             die 1 "weblate must be locked, currently: $(wlc lock-status)"
@@ -77,14 +79,18 @@ weblate.translations.commit() {
     # create a commit in the local branch (master)
 
     local existing_commit_hash commit_body commit_message exitcode
-    (   set -e
+    (
+        set -e
         pyenv.activate
         # lock change on weblate
         wlc lock
 
         # get translations branch in git worktree (TRANSLATIONS_WORKTREE)
         weblate.translations.worktree
-        existing_commit_hash=$(cd "${TRANSLATIONS_WORKTREE}"; git log -n1  --pretty=format:'%h')
+        existing_commit_hash=$(
+            cd "${TRANSLATIONS_WORKTREE}"
+            git log -n1 --pretty=format:'%h'
+        )
 
         # pull weblate commits
         weblate.to.translations
@@ -95,20 +101,23 @@ weblate.translations.commit() {
         # compile translations
         build_msg BABEL 'compile translation catalogs into binary MO files'
         pybabel compile --statistics \
-                -d "searx/translations"
+            -d "searx/translations"
 
         # update searx/data/translation_labels.json
         data.locales
 
         # git add/commit (no push)
-        commit_body=$(cd "${TRANSLATIONS_WORKTREE}"; git log --pretty=format:'%h - %as - %aN <%ae>' "${existing_commit_hash}..HEAD")
+        commit_body=$(
+            cd "${TRANSLATIONS_WORKTREE}"
+            git log --pretty=format:'%h - %as - %aN <%ae>' "${existing_commit_hash}..HEAD"
+        )
         commit_message=$(echo -e "[l10n] update translations from Weblate\n\n${commit_body}")
         git add searx/translations
         git add searx/data/locales.json
         git commit -m "${commit_message}"
     )
     exitcode=$?
-    (   # make sure to always unlock weblate
+    ( # make sure to always unlock weblate
         set -e
         pyenv.cmd wlc unlock
     )
@@ -133,9 +142,10 @@ weblate.push.translations() {
     # 5. Notify Weblate to pull updated 'master' & 'translations' branch.
 
     local messages_pot diff_messages_pot last_commit_hash last_commit_detail \
-          exitcode
+        exitcode
     messages_pot="${TRANSLATIONS_WORKTREE}/searx/translations/messages.pot"
-    (   set -e
+    (
+        set -e
         pyenv.activate
         # get translations branch in git worktree (TRANSLATIONS_WORKTREE)
         weblate.translations.worktree
@@ -143,12 +153,14 @@ weblate.push.translations() {
         # update messages.pot in the master branch
         build_msg BABEL 'extract messages from source files and generate POT file'
         pybabel extract -F babel.cfg \
-                -o "${messages_pot}" \
-                "searx/"
+            -o "${messages_pot}" \
+            "searx/"
 
         # stop if there is no meaningful change in the master branch
-        diff_messages_pot=$(cd "${TRANSLATIONS_WORKTREE}";\
-                            git diff -- "searx/translations/messages.pot")
+        diff_messages_pot=$(
+            cd "${TRANSLATIONS_WORKTREE}"
+            git diff -- "searx/translations/messages.pot"
+        )
         if ! echo "$diff_messages_pot" | grep -qE "[\+\-](msgid|msgstr)"; then
             build_msg BABEL 'no changes detected, exiting'
             return 42
@@ -160,7 +172,7 @@ weblate.push.translations() {
         return 0
     fi
     if [ "$exitcode" -gt 0 ]; then
-       return $exitcode
+        return $exitcode
     fi
     (
         set -e
@@ -192,7 +204,7 @@ weblate.push.translations() {
             -d "${TRANSLATIONS_WORKTREE}/searx/translations"
 
         # git add/commit/push
-        last_commit_hash=$(git log -n1  --pretty=format:'%h')
+        last_commit_hash=$(git log -n1 --pretty=format:'%h')
         last_commit_detail=$(git log -n1 --pretty=format:'%h - %as - %aN <%ae>' "${last_commit_hash}")
 
         pushd "${TRANSLATIONS_WORKTREE}"
@@ -207,7 +219,7 @@ weblate.push.translations() {
         wlc pull
     )
     exitcode=$?
-    (   # make sure to always unlock weblate
+    ( # make sure to always unlock weblate
         set -e
         pyenv.activate
         wlc unlock
diff --git a/utils/lib_valkey.sh b/utils/lib_valkey.sh
index 7e7beb948..53681338e 100755
--- a/utils/lib_valkey.sh
+++ b/utils/lib_valkey.sh
@@ -5,10 +5,10 @@ valkey.distro.setup() {
     # shellcheck disable=SC2034
 
     case $DIST_ID in
-        ubuntu|debian)
+        ubuntu | debian)
             VALKEY_PACKAGES="valkey-server"
             ;;
-        arch|fedora|centos)
+        arch | fedora | centos)
             VALKEY_PACKAGES="valkey"
             ;;
         *)
@@ -36,13 +36,13 @@ valkey.backports() {
     esac
 }
 
-valkey.install(){
+valkey.install() {
     info_msg "installing valkey ..."
     valkey.distro.setup
 
     case $DIST_ID in
-        debian|ubuntu)
-            apt-cache show "${VALKEY_PACKAGES}" &> /dev/null  || valkey.backports
+        debian | ubuntu)
+            apt-cache show "${VALKEY_PACKAGES}" &>/dev/null || valkey.backports
             pkg_install "${VALKEY_PACKAGES}"
 
             # do some fix ...
@@ -54,7 +54,7 @@ valkey.install(){
 
             systemd_activate_service valkey-server
             ;;
-        arch|fedora|centos)
+        arch | fedora | centos)
             pkg_install "${VALKEY_PACKAGES}"
             systemd_activate_service valkey
             ;;
diff --git a/utils/lxc.sh b/utils/lxc.sh
index f9daa51f5..232c422bb 100755
--- a/utils/lxc.sh
+++ b/utils/lxc.sh
@@ -60,19 +60,17 @@ REMOTE_IMAGES=()
 CONTAINERS=()
 LOCAL_IMAGES=()
 
-for ((i=0; i<${#LXC_SUITE[@]}; i+=2)); do
+for ((i = 0; i < ${#LXC_SUITE[@]}; i += 2)); do
     REMOTE_IMAGES=("${REMOTE_IMAGES[@]}" "${LXC_SUITE[i]}")
-    CONTAINERS=("${CONTAINERS[@]}" "${LXC_HOST_PREFIX}-${LXC_SUITE[i+1]}")
-    LOCAL_IMAGES=("${LOCAL_IMAGES[@]}" "${LXC_SUITE[i+1]}")
+    CONTAINERS=("${CONTAINERS[@]}" "${LXC_HOST_PREFIX}-${LXC_SUITE[i + 1]}")
+    LOCAL_IMAGES=("${LOCAL_IMAGES[@]}" "${LXC_SUITE[i + 1]}")
 done
 
 HOST_USER="${SUDO_USER:-$USER}"
 HOST_USER_ID=$(id -u "${HOST_USER}")
 HOST_GROUP_ID=$(id -g "${HOST_USER}")
 
-# ----------------------------------------------------------------------------
 usage() {
-# ----------------------------------------------------------------------------
     _cmd="$(basename "$0")"
     cat <<EOF
 usage::
@@ -110,12 +108,12 @@ install
 
 EOF
     usage_containers
-    [ -n "${1+x}" ] &&  err_msg "$1"
+    [ -n "${1+x}" ] && err_msg "$1"
 }
 
 usage_containers() {
     lxc_suite_install_info
-    [ -n "${1+x}" ] &&  err_msg "$1"
+    [ -n "${1+x}" ] && err_msg "$1"
 }
 
 lxd_info() {
@@ -138,7 +136,7 @@ main() {
     lxc_distro_setup
 
     # don't check prerequisite when in recursion
-    if [[ ! $1 == __* ]] && [[ ! $1 == --help  ]]; then
+    if [[ $1 != __* ]] && [[ $1 != --help ]]; then
         if ! in_container; then
             ! required_commands lxc && lxd_info && exit 42
         fi
@@ -146,27 +144,40 @@ main() {
     fi
 
     case $1 in
-        --getenv)  var="$2"; echo "${!var}"; exit 0;;
-        -h|--help) usage; exit 0;;
+        --getenv)
+            var="$2"
+            echo "${!var}"
+            exit 0
+            ;;
+        -h | --help)
+            usage
+            exit 0
+            ;;
 
         build)
             sudo_or_exit
             case $2 in
                 ${LXC_HOST_PREFIX}-*) build_container "$2" ;;
-                ''|--|containers) build_all_containers ;;
-                *) usage "$_usage"; exit 42;;
+                '' | -- | containers) build_all_containers ;;
+                *)
+                    usage "$_usage"
+                    exit 42
+                    ;;
             esac
             ;;
         copy)
             case $2 in
-                ''|images) lxc_copy_images_locally;;
-                *) usage "$_usage"; exit 42;;
+                '' | images) lxc_copy_images_locally ;;
+                *)
+                    usage "$_usage"
+                    exit 42
+                    ;;
             esac
             ;;
         remove)
             sudo_or_exit
             case $2 in
-                ''|--|containers) remove_containers ;;
+                '' | -- | containers) remove_containers ;;
                 images) lxc_delete_images_locally ;;
                 ${LXC_HOST_PREFIX}-*)
                     ! lxc_exists "$2" && warn_msg "container not yet exists: $2" && exit 0
@@ -174,19 +185,25 @@ main() {
                         lxc_delete_container "$2"
                     fi
                     ;;
-                *) usage "unknown or missing container <name> $2"; exit 42;;
+                *)
+                    usage "unknown or missing container <name> $2"
+                    exit 42
+                    ;;
             esac
             ;;
-        start|stop)
+        start | stop)
             sudo_or_exit
             case $2 in
-                ''|--|containers)  lxc_cmd "$1" ;;
+                '' | -- | containers) lxc_cmd "$1" ;;
                 ${LXC_HOST_PREFIX}-*)
                     ! lxc_exists "$2" && usage_containers "unknown container: $2" && exit 42
                     info_msg "lxc $1 $2"
                     lxc "$1" "$2" | prefix_stdout "[${_BBlue}${i}${_creset}] "
                     ;;
-                *) usage "unknown or missing container <name> $2"; exit 42;;
+                *)
+                    usage "unknown or missing container <name> $2"
+                    exit 42
+                    ;;
             esac
             ;;
         show)
@@ -195,10 +212,10 @@ main() {
                 suite)
                     case $3 in
                         ${LXC_HOST_PREFIX}-*)
-                            lxc exec -t "$3" -- "${LXC_REPO_ROOT}/utils/lxc.sh" __show suite \
-                                | prefix_stdout "[${_BBlue}$3${_creset}]  "
-                        ;;
-                        *) show_suite;;
+                            lxc exec -t "$3" -- "${LXC_REPO_ROOT}/utils/lxc.sh" __show suite |
+                                prefix_stdout "[${_BBlue}$3${_creset}]  "
+                            ;;
+                        *) show_suite ;;
                     esac
                     ;;
                 images) show_images ;;
@@ -207,7 +224,7 @@ main() {
                         ${LXC_HOST_PREFIX}-*)
                             ! lxc_exists "$3" && usage_containers "unknown container: $3" && exit 42
                             lxc config show "$3" | prefix_stdout "[${_BBlue}${3}${_creset}] "
-                        ;;
+                            ;;
                         *)
                             rst_title "container configurations"
                             echo
@@ -230,7 +247,10 @@ main() {
                             ;;
                     esac
                     ;;
-                *) usage "$_usage"; exit 42;;
+                *)
+                    usage "$_usage"
+                    exit 42
+                    ;;
             esac
             ;;
         __show)
@@ -243,30 +263,36 @@ main() {
             sudo_or_exit
             shift
             case $1 in
-                --) shift; lxc_exec "$@" ;;
+                --)
+                    shift
+                    lxc_exec "$@"
+                    ;;
                 ${LXC_HOST_PREFIX}-*)
                     ! lxc_exists "$1" && usage_containers "unknown container: $1" && exit 42
                     local name=$1
                     shift
                     lxc_exec_cmd "${name}" "$@"
                     ;;
-                *) usage_containers "unknown container: $1" && exit 42
-           esac
+                *) usage_containers "unknown container: $1" && exit 42 ;;
+            esac
             ;;
         install)
             sudo_or_exit
             case $2 in
-                suite|base)
+                suite | base)
                     case $3 in
                         ${LXC_HOST_PREFIX}-*)
                             ! lxc_exists "$3" && usage_containers "unknown container: $3" && exit 42
                             lxc_exec_cmd "$3" "${LXC_REPO_ROOT}/utils/lxc.sh" __install "$2"
                             ;;
-                        ''|--) lxc_exec "${LXC_REPO_ROOT}/utils/lxc.sh" __install "$2" ;;
-                        *) usage_containers "unknown container: $3" && exit 42
+                        '' | --) lxc_exec "${LXC_REPO_ROOT}/utils/lxc.sh" __install "$2" ;;
+                        *) usage_containers "unknown container: $3" && exit 42 ;;
                     esac
                     ;;
-                *) usage "$_usage"; exit 42 ;;
+                *)
+                    usage "$_usage"
+                    exit 42
+                    ;;
             esac
             ;;
         __install)
@@ -281,12 +307,17 @@ main() {
             echo
             echo ".. generic utils/lxc.sh documentation"
             ;;
-        -*) usage "unknown option $1"; exit 42;;
-        *)  usage "unknown or missing command $1"; exit 42;;
+        -*)
+            usage "unknown option $1"
+            exit 42
+            ;;
+        *)
+            usage "unknown or missing command $1"
+            exit 42
+            ;;
     esac
 }
 
-
 build_all_containers() {
     rst_title "Build all LXC containers of suite"
     echo
@@ -310,11 +341,11 @@ build_container() {
     local image
     local boilerplate_script
 
-    for ((i=0; i<${#LXC_SUITE[@]}; i+=2)); do
-        if [ "${LXC_HOST_PREFIX}-${LXC_SUITE[i+1]}" = "$1" ]; then
+    for ((i = 0; i < ${#LXC_SUITE[@]}; i += 2)); do
+        if [ "${LXC_HOST_PREFIX}-${LXC_SUITE[i + 1]}" = "$1" ]; then
             remote_image="${LXC_SUITE[i]}"
-            container="${LXC_HOST_PREFIX}-${LXC_SUITE[i+1]}"
-            image="${LXC_SUITE[i+1]}"
+            container="${LXC_HOST_PREFIX}-${LXC_SUITE[i + 1]}"
+            image="${LXC_SUITE[i + 1]}"
             boilerplate_script="${image}_boilerplate"
             boilerplate_script="${!boilerplate_script}"
             break
@@ -335,8 +366,8 @@ build_container() {
     lxc_install_boilerplate "${container}" "$boilerplate_script"
     echo
     rst_title "install LXC base packages" section
-    lxc_exec_cmd "${container}" "${LXC_REPO_ROOT}/utils/lxc.sh" __install base \
-        | prefix_stdout "[${_BBlue}${container}${_creset}] "
+    lxc_exec_cmd "${container}" "${LXC_REPO_ROOT}/utils/lxc.sh" __install base |
+        prefix_stdout "[${_BBlue}${container}${_creset}] "
     echo
     lxc list "$container"
 }
@@ -348,7 +379,7 @@ remove_containers() {
     lxc list "$LXC_HOST_PREFIX-"
     echo -en "\\n${_BRed}LXC containers to delete::${_creset}\\n\\n  ${CONTAINERS[*]}\\n" | $FMT
     local default=Ny
-    [[ $FORCE_TIMEOUT = 0 ]] && default=Yn
+    [[ $FORCE_TIMEOUT == 0 ]] && default=Yn
     if ask_yn "Do you really want to delete these containers" $default; then
         for i in "${CONTAINERS[@]}"; do
             lxc_delete_container "$i"
@@ -363,8 +394,8 @@ remove_containers() {
 
 lxc_copy_images_locally() {
     rst_title "copy images" section
-    for ((i=0; i<${#LXC_SUITE[@]}; i+=2)); do
-        lxc_image_copy "${LXC_SUITE[i]}" "${LXC_SUITE[i+1]}"
+    for ((i = 0; i < ${#LXC_SUITE[@]}; i += 2)); do
+        lxc_image_copy "${LXC_SUITE[i]}" "${LXC_SUITE[i + 1]}"
     done
     # lxc image list local: && wait_key
 }
@@ -391,7 +422,7 @@ lxc_delete_images_locally() {
     lxc image list local:
 }
 
-show_images(){
+show_images() {
     rst_title "local images"
     echo
     lxc image list local:
@@ -408,11 +439,10 @@ show_images(){
 
 }
 
-
 # container
 # ---------
 
-show_suite(){
+show_suite() {
     rst_title "LXC suite ($LXC_HOST_PREFIX-*)"
     echo
     lxc list "$LXC_HOST_PREFIX-"
@@ -421,8 +451,8 @@ show_suite(){
         if ! lxc_exists "$i"; then
             warn_msg "container ${_BBlue}$i${_creset} does not yet exists"
         else
-            lxc exec -t "${i}" -- "${LXC_REPO_ROOT}/utils/lxc.sh" __show suite \
-                | prefix_stdout "[${_BBlue}${i}${_creset}]  "
+            lxc exec -t "${i}" -- "${LXC_REPO_ROOT}/utils/lxc.sh" __show suite |
+                prefix_stdout "[${_BBlue}${i}${_creset}]  "
             echo
         fi
     done
@@ -469,8 +499,8 @@ lxc_init_all_containers() {
     local image_name
     local container_name
 
-    for ((i=0; i<${#LXC_SUITE[@]}; i+=2)); do
-        lxc_init_container "${LXC_SUITE[i+1]}" "${LXC_HOST_PREFIX}-${LXC_SUITE[i+1]}"
+    for ((i = 0; i < ${#LXC_SUITE[@]}; i += 2)); do
+        lxc_init_container "${LXC_SUITE[i + 1]}" "${LXC_HOST_PREFIX}-${LXC_SUITE[i + 1]}"
     done
 }
 
@@ -487,8 +517,8 @@ lxc_config_container() {
 
     info_msg "[${_BBlue}$1${_creset}] map uid/gid from host to container"
     # https://lxd.readthedocs.io/en/latest/userns-idmap/#custom-idmaps
-    echo -e -n "uid $HOST_USER_ID 0\\ngid $HOST_GROUP_ID 0"\
-        | lxc config set "$1" raw.idmap -
+    echo -e -n "uid $HOST_USER_ID 0\\ngid $HOST_GROUP_ID 0" |
+        lxc config set "$1" raw.idmap -
 
     info_msg "[${_BBlue}$1${_creset}] share ${REPO_ROOT} (repo_share) from HOST into container"
     # https://lxd.readthedocs.io/en/latest/instances/#type-disk
@@ -504,15 +534,15 @@ lxc_boilerplate_all_containers() {
     local boilerplate_script
     local image_name
 
-    for ((i=0; i<${#LXC_SUITE[@]}; i+=2)); do
+    for ((i = 0; i < ${#LXC_SUITE[@]}; i += 2)); do
 
-        image_name="${LXC_SUITE[i+1]}"
+        image_name="${LXC_SUITE[i + 1]}"
         boilerplate_script="${image_name}_boilerplate"
         boilerplate_script="${!boilerplate_script}"
 
         lxc_install_boilerplate "${LXC_HOST_PREFIX}-${image_name}" "$boilerplate_script"
 
-        if [[ -z "${boilerplate_script}" ]]; then
+        if [[ -z ${boilerplate_script} ]]; then
             err_msg "[${_BBlue}${container_name}${_creset}] no boilerplate for image '${image_name}'"
         fi
     done
@@ -546,10 +576,10 @@ EOF
     if lxc start -q "${container_name}" &>/dev/null; then
         sleep 5 # guest needs some time to come up and get an IP
     fi
-    if [[ -n "${boilerplate_script}" ]]; then
-        echo "${boilerplate_script}" \
-            | lxc exec "${container_name}" -- bash \
-            | prefix_stdout "[${_BBlue}${container_name}${_creset}] "
+    if [[ -n ${boilerplate_script} ]]; then
+        echo "${boilerplate_script}" |
+            lxc exec "${container_name}" -- bash |
+            prefix_stdout "[${_BBlue}${container_name}${_creset}] "
     fi
 }
 
@@ -568,6 +598,4 @@ check_connectivity() {
     return $ret_val
 }
 
-# ----------------------------------------------------------------------------
 main "$@"
-# ----------------------------------------------------------------------------
diff --git a/utils/searxng.sh b/utils/searxng.sh
index ed32dea77..d7e8fd6be 100755
--- a/utils/searxng.sh
+++ b/utils/searxng.sh
@@ -46,7 +46,7 @@ if in_container; then
     SEARXNG_URL="http://$(primary_ip)/searxng"
 fi
 SEARXNG_URL_PATH="$(echo "${SEARXNG_URL}" | sed -e 's,^.*://[^/]*\(/.*\),\1,g')"
-[[ "${SEARXNG_URL_PATH}" == "${SEARXNG_URL}" ]] && SEARXNG_URL_PATH=/
+[[ ${SEARXNG_URL_PATH} == "${SEARXNG_URL}" ]] && SEARXNG_URL_PATH=/
 
 # Apache settings
 
@@ -98,7 +98,7 @@ case $DIST_ID-$DIST_VERS in
         SEARXNG_BUILD_PACKAGES="${SEARXNG_BUILD_PACKAGES_debian}"
         APACHE_PACKAGES="$APACHE_PACKAGES libapache2-mod-proxy-uwsgi"
         ;;
-    ubuntu-*|debian-*)
+    ubuntu-* | debian-*)
         SEARXNG_PACKAGES="${SEARXNG_PACKAGES_debian} python-is-python3"
         SEARXNG_BUILD_PACKAGES="${SEARXNG_BUILD_PACKAGES_debian}"
         ;;
@@ -114,9 +114,7 @@ esac
 
 _service_prefix="  ${_Yellow}|${SERVICE_USER}|${_creset} "
 
-# ----------------------------------------------------------------------------
 usage() {
-# ----------------------------------------------------------------------------
 
     # shellcheck disable=SC1117
     cat <<EOF
@@ -148,7 +146,7 @@ instance:
   cmd           : run command in SearXNG instance's environment (e.g. bash)
 EOF
     searxng.instance.env
-    [[ -n ${1} ]] &&  err_msg "$1"
+    [[ -n ${1} ]] && err_msg "$1"
 }
 
 searxng.instance.env() {
@@ -170,52 +168,68 @@ EOF
 
 main() {
     case $1 in
-        install|remove|instance)
+        install | remove | instance)
             nginx_distro_setup
             apache_distro_setup
             uWSGI_distro_setup
             required_commands \
-                sudo systemctl install git wget curl \
-                || exit
+                sudo systemctl install git wget curl ||
+                exit
             ;;
     esac
 
     local _usage="unknown or missing $1 command $2"
 
     case $1 in
-        --getenv)  var="$2"; echo "${!var}"; exit 0;;
-        --cmd)  shift; "$@";;
-        -h|--help) usage; exit 0;;
+        --getenv)
+            var="$2"
+            echo "${!var}"
+            exit 0
+            ;;
+        --cmd)
+            shift
+            "$@"
+            ;;
+        -h | --help)
+            usage
+            exit 0
+            ;;
         install)
             sudo_or_exit
             case $2 in
-                all) searxng.install.all;;
-                user) searxng.install.user;;
-                pyenv) searxng.install.pyenv;;
-                searxng-src) searxng.install.clone;;
-                settings) searxng.install.settings;;
-                uwsgi) searxng.install.uwsgi;;
-                packages) searxng.install.packages;;
-                buildhost) searxng.install.buildhost;;
-                nginx) searxng.nginx.install;;
-                apache) searxng.apache.install;;
-                valkey) searxng.install.valkey;;
-                *) usage "$_usage"; exit 42;;
+                all) searxng.install.all ;;
+                user) searxng.install.user ;;
+                pyenv) searxng.install.pyenv ;;
+                searxng-src) searxng.install.clone ;;
+                settings) searxng.install.settings ;;
+                uwsgi) searxng.install.uwsgi ;;
+                packages) searxng.install.packages ;;
+                buildhost) searxng.install.buildhost ;;
+                nginx) searxng.nginx.install ;;
+                apache) searxng.apache.install ;;
+                valkey) searxng.install.valkey ;;
+                *)
+                    usage "$_usage"
+                    exit 42
+                    ;;
             esac
             ;;
         remove)
             sudo_or_exit
             case $2 in
-                all) searxng.remove.all;;
-                user) drop_service_account "${SERVICE_USER}";;
-                pyenv) searxng.remove.pyenv;;
-                settings) searxng.remove.settings;;
-                uwsgi) searxng.remove.uwsgi;;
-                apache) searxng.apache.remove;;
-                remove) searxng.nginx.remove;;
-                valkey) searxng.remove.valkey;;
-                redis) searxng.remove.redis;;
-                *) usage "$_usage"; exit 42;;
+                all) searxng.remove.all ;;
+                user) drop_service_account "${SERVICE_USER}" ;;
+                pyenv) searxng.remove.pyenv ;;
+                settings) searxng.remove.settings ;;
+                uwsgi) searxng.remove.uwsgi ;;
+                apache) searxng.apache.remove ;;
+                remove) searxng.nginx.remove ;;
+                valkey) searxng.remove.valkey ;;
+                redis) searxng.remove.redis ;;
+                *)
+                    usage "$_usage"
+                    exit 42
+                    ;;
             esac
             ;;
         instance)
@@ -234,19 +248,30 @@ main() {
                     ;;
                 cmd)
                     sudo_or_exit
-                    shift; shift; searxng.instance.exec "$@"
+                    shift
+                    shift
+                    searxng.instance.exec "$@"
                     ;;
                 get_setting)
-                    shift; shift; searxng.instance.get_setting "$@"
+                    shift
+                    shift
+                    searxng.instance.get_setting "$@"
                     ;;
                 call)
                     # call a function in instance's environment
-                    shift; shift; searxng.instance.self.call "$@"
+                    shift
+                    shift
+                    searxng.instance.self.call "$@"
                     ;;
                 _call)
-                    shift; shift; "$@"
+                    shift
+                    shift
+                    "$@"
+                    ;;
+                *)
+                    usage "$_usage"
+                    exit 42
                     ;;
-                *) usage "$_usage"; exit 42;;
             esac
             ;;
         *)
@@ -314,7 +339,7 @@ In your instance, valkey DB connector is configured at:
         fi
     fi
 
-    if ! [[ ${valkey_url} = valkey://localhost:6379/* ]]; then
+    if ! [[ ${valkey_url} == valkey://localhost:6379/* ]]; then
         err_msg "SearXNG instance can't connect valkey DB / check valkey & your settings"
         return
     fi
@@ -352,7 +377,7 @@ searxng.remove.all() {
     fi
 
     valkey_url=$(searxng.instance.get_setting valkey.url)
-    if ! [[ ${valkey_url} = unix://${VALKEY_HOME}/run/valkey.sock* ]]; then
+    if ! [[ ${valkey_url} == unix://${VALKEY_HOME}/run/valkey.sock* ]]; then
         searxng.remove.valkey
     fi
 
@@ -369,9 +394,9 @@ searxng.remove.all() {
 searxng.install.user() {
     rst_title "SearXNG -- install user" section
     echo
-    if getent passwd "${SERVICE_USER}"  > /dev/null; then
-       echo "user already exists"
-       return 0
+    if getent passwd "${SERVICE_USER}" >/dev/null; then
+        echo "user already exists"
+        return 0
     fi
 
     tee_stderr 1 <<EOF | bash | prefix_stdout
@@ -390,7 +415,7 @@ searxng.install.packages() {
 
 searxng.install.buildhost() {
     TITLE="SearXNG -- install buildhost packages" pkg_install \
-         "${SEARXNG_PACKAGES} ${SEARXNG_BUILD_PACKAGES}"
+        "${SEARXNG_PACKAGES} ${SEARXNG_BUILD_PACKAGES}"
 }
 
 searxng.install.clone() {
@@ -399,11 +424,11 @@ searxng.install.clone() {
         die 42 "To clone SearXNG, first install user ${SERVICE_USER}."
     fi
     echo
-    if ! sudo -i -u "${SERVICE_USER}" ls -d "$REPO_ROOT" > /dev/null; then
+    if ! sudo -i -u "${SERVICE_USER}" ls -d "$REPO_ROOT" >/dev/null; then
         die 42 "user '${SERVICE_USER}' missed read permission: $REPO_ROOT"
     fi
     # SERVICE_HOME="$(sudo -i -u "${SERVICE_USER}" echo \$HOME 2>/dev/null)"
-    if [[ ! "${SERVICE_HOME}" ]]; then
+    if [[ ! ${SERVICE_HOME} ]]; then
         err_msg "to clone SearXNG sources, user ${SERVICE_USER} hast to be created first"
         return 42
     fi
@@ -412,7 +437,7 @@ searxng.install.clone() {
         info_msg "create local branch ${GIT_BRANCH} from start point: origin/${GIT_BRANCH}"
         git branch "${GIT_BRANCH}" "origin/${GIT_BRANCH}"
     fi
-    if [[ ! $(git rev-parse --abbrev-ref HEAD) == "${GIT_BRANCH}" ]]; then
+    if [[ $(git rev-parse --abbrev-ref HEAD) != "${GIT_BRANCH}" ]]; then
         warn_msg "take into account, installing branch $GIT_BRANCH while current branch is $(git rev-parse --abbrev-ref HEAD)"
     fi
     # export SERVICE_HOME
@@ -421,10 +446,10 @@ searxng.install.clone() {
     # https://github.com/searxng/searxng/issues/1251
     git config --system --add safe.directory "${REPO_ROOT}/.git"
     git_clone "$REPO_ROOT" "${SEARXNG_SRC}" \
-              "$GIT_BRANCH" "${SERVICE_USER}"
+        "$GIT_BRANCH" "${SERVICE_USER}"
     git config --system --add safe.directory "${SEARXNG_SRC}"
 
-    pushd "${SEARXNG_SRC}" > /dev/null
+    pushd "${SEARXNG_SRC}" >/dev/null
     tee_stderr 0.1 <<EOF | sudo -H -u "${SERVICE_USER}" -i 2>&1 | prefix_stdout "$_service_prefix"
 cd "${SEARXNG_SRC}"
 git remote set-url origin ${GIT_URL}
@@ -432,7 +457,7 @@ git config user.email "${ADMIN_EMAIL}"
 git config user.name "${ADMIN_NAME}"
 git config --list
 EOF
-    popd > /dev/null
+    popd >/dev/null
 }
 
 searxng.install.link_src() {
@@ -482,7 +507,7 @@ searxng.remove.pyenv() {
         return
     fi
     info_msg "remove pyenv activation from ~/.profile"
-    tee_stderr 0.1 <<EOF | sudo -H -u "${SERVICE_USER}" -i 2>&1 |  prefix_stdout "$_service_prefix"
+    tee_stderr 0.1 <<EOF | sudo -H -u "${SERVICE_USER}" -i 2>&1 | prefix_stdout "$_service_prefix"
 grep -v 'source ${SEARXNG_PYENV}/bin/activate' ~/.profile > ~/.profile.##
 mv ~/.profile.## ~/.profile
 EOF
@@ -499,9 +524,9 @@ searxng.install.settings() {
     mkdir -p "$(dirname "${SEARXNG_SETTINGS_PATH}")"
 
     DEFAULT_SELECT=1 \
-                  install_template --no-eval \
-                  "${SEARXNG_SETTINGS_PATH}" \
-                  "${SERVICE_USER}" "${SERVICE_GROUP}"
+        install_template --no-eval \
+        "${SEARXNG_SETTINGS_PATH}" \
+        "${SERVICE_USER}" "${SERVICE_GROUP}"
 
     tee_stderr 0.1 <<EOF | sudo -H -i 2>&1 | prefix_stdout "root"
 sed -i -e "s/ultrasecretkey/$(openssl rand -hex 16)/g" "${SEARXNG_SETTINGS_PATH}"
@@ -535,9 +560,9 @@ pip install -U --use-pep517 --no-build-isolation -e .
 EOF
     rst_para "update instance's settings.yml from ${SEARXNG_SETTINGS_PATH}"
     DEFAULT_SELECT=2 \
-                  install_template --no-eval \
-                  "${SEARXNG_SETTINGS_PATH}" \
-                  "${SERVICE_USER}" "${SERVICE_GROUP}"
+        install_template --no-eval \
+        "${SEARXNG_SETTINGS_PATH}" \
+        "${SERVICE_USER}" "${SERVICE_GROUP}"
 
     sudo -H -i <<EOF
 sed -i -e "s/ultrasecretkey/$(openssl rand -hex 16)/g" "${SEARXNG_SETTINGS_PATH}"
@@ -574,10 +599,10 @@ searxng.install.uwsgi.socket() {
             # Emperor will run the vassal using the UID/GID of the vassal
             # configuration file [1] (user and group of the app .ini file).
             # [1] https://uwsgi-docs.readthedocs.io/en/latest/Emperor.html#tyrant-mode-secure-multi-user-hosting
-            uWSGI_install_app --variant=socket  "${SEARXNG_UWSGI_APP}" "${SERVICE_USER}" "${SERVICE_GROUP}"
+            uWSGI_install_app --variant=socket "${SEARXNG_UWSGI_APP}" "${SERVICE_USER}" "${SERVICE_GROUP}"
             ;;
         *)
-            uWSGI_install_app --variant=socket  "${SEARXNG_UWSGI_APP}"
+            uWSGI_install_app --variant=socket "${SEARXNG_UWSGI_APP}"
             ;;
     esac
     sleep 5
@@ -588,9 +613,9 @@ searxng.install.uwsgi.socket() {
 
 searxng.uwsgi.available() {
     if [[ ${SEARXNG_UWSGI_USE_SOCKET} == true ]]; then
-        [[ -S "${SEARXNG_UWSGI_SOCKET}" ]]
+        [[ -S ${SEARXNG_UWSGI_SOCKET} ]]
         exit_val=$?
-        if [[ $exit_val = 0 ]]; then
+        if [[ $exit_val == 0 ]]; then
             info_msg "uWSGI socket is located at: ${SEARXNG_UWSGI_SOCKET}"
         fi
     else
@@ -617,11 +642,10 @@ searxng.install.valkey() {
     valkey.install
 }
 
-
 searxng.instance.localtest() {
     rst_title "Test SearXNG instance locally" section
-    rst_para "Activate debug mode, start a minimal SearXNG "\
-             "service and debug a HTTP request/response cycle."
+    rst_para "Activate debug mode, start a minimal SearXNG " \
+        "service and debug a HTTP request/response cycle."
 
     if service_is_available "http://${SEARXNG_INTERNAL_HTTP}" &>/dev/null; then
         err_msg "URL/port http://${SEARXNG_INTERNAL_HTTP} is already in use, you"
@@ -632,7 +656,7 @@ searxng.instance.localtest() {
     fi
     echo
     searxng.instance.debug.on
-    tee_stderr 0.1 <<EOF | sudo -H -u "${SERVICE_USER}" -i 2>&1 |  prefix_stdout "$_service_prefix"
+    tee_stderr 0.1 <<EOF | sudo -H -u "${SERVICE_USER}" -i 2>&1 | prefix_stdout "$_service_prefix"
 export SEARXNG_SETTINGS_PATH="${SEARXNG_SETTINGS_PATH}"
 cd ${SEARXNG_SRC}
 timeout 10 python searx/webapp.py &
@@ -714,7 +738,7 @@ This installs SearXNG's uWSGI app as Nginx site.  The Nginx site is located at:
 ${NGINX_APPS_AVAILABLE}/${NGINX_SEARXNG_SITE} and requires a uWSGI."
     searxng.install.http.pre
 
-    if ! nginx_is_installed ; then
+    if ! nginx_is_installed; then
         err_msg "Nginx packages are not installed"
         if ! ask_yn "Do you really want to continue and install Nginx packages?" Yn; then
             return
@@ -755,8 +779,8 @@ searxng.instance.exec() {
         die 42 "can't execute: instance does not exist (missed account ${SERVICE_USER})"
     fi
     sudo -H -i -u "${SERVICE_USER}" \
-         SEARXNG_UWSGI_USE_SOCKET="${SEARXNG_UWSGI_USE_SOCKET}" \
-         "$@"
+        SEARXNG_UWSGI_USE_SOCKET="${SEARXNG_UWSGI_USE_SOCKET}" \
+        "$@"
 }
 
 searxng.instance.self.call() {
@@ -775,7 +799,7 @@ EOF
 searxng.instance.debug.on() {
     warn_msg "Do not enable debug in a production environment!"
     info_msg "try to enable debug mode ..."
-    tee_stderr 0.1 <<EOF | sudo -H -i 2>&1 |  prefix_stdout "$_service_prefix"
+    tee_stderr 0.1 <<EOF | sudo -H -i 2>&1 | prefix_stdout "$_service_prefix"
 cd ${SEARXNG_SRC}
 sed -i -e "s/debug: false/debug: true/g" "$SEARXNG_SETTINGS_PATH"
 EOF
@@ -784,7 +808,7 @@ EOF
 
 searxng.instance.debug.off() {
     info_msg "try to disable debug mode ..."
-    tee_stderr 0.1 <<EOF | sudo -H -i 2>&1 |  prefix_stdout "$_service_prefix"
+    tee_stderr 0.1 <<EOF | sudo -H -i 2>&1 | prefix_stdout "$_service_prefix"
 cd ${SEARXNG_SRC}
 sed -i -e "s/debug: true/debug: false/g" "$SEARXNG_SETTINGS_PATH"
 EOF
@@ -805,7 +829,7 @@ searxng.instance.inspect() {
     echo
 
     case $DIST_ID-$DIST_VERS in
-        ubuntu-*|debian-*)
+        ubuntu-* | debian-*)
             # For uWSGI debian uses the LSB init process; for each configuration
             # file new uWSGI daemon instance is started with additional option.
             service uwsgi status "${SERVICE_NAME}"
@@ -818,16 +842,16 @@ searxng.instance.inspect() {
             ;;
     esac
 
-    echo -e  "// use ${_BCyan}CTRL-C${_creset} to stop monitoring the log"
+    echo -e "// use ${_BCyan}CTRL-C${_creset} to stop monitoring the log"
     read -r -s -n1 -t 5
     echo
 
-    while true;  do
+    while true; do
         trap break 2
         case $DIST_ID-$DIST_VERS in
-            ubuntu-*|debian-*) tail -f "/var/log/uwsgi/app/${SERVICE_NAME%.*}.log" ;;
-            arch-*)  journalctl -f -u "uwsgi@${SERVICE_NAME%.*}" ;;
-            fedora-*)  journalctl -f -u uwsgi ;;
+            ubuntu-* | debian-*) tail -f "/var/log/uwsgi/app/${SERVICE_NAME%.*}.log" ;;
+            arch-*) journalctl -f -u "uwsgi@${SERVICE_NAME%.*}" ;;
+            fedora-*) journalctl -f -u uwsgi ;;
         esac
     done
 
@@ -870,10 +894,10 @@ searxng.doc.rst() {
     local arch_build="${SEARXNG_BUILD_PACKAGES_arch}"
     local fedora_build="${SEARXNG_BUILD_PACKAGES_fedora}"
     debian="$(echo "${debian}" | sed 's/.*/          & \\/' | sed '$ s/.$//')"
-    arch="$(echo "${arch}"     | sed 's/.*/          & \\/' | sed '$ s/.$//')"
+    arch="$(echo "${arch}" | sed 's/.*/          & \\/' | sed '$ s/.$//')"
     fedora="$(echo "${fedora}" | sed 's/.*/          & \\/' | sed '$ s/.$//')"
     debian_build="$(echo "${debian_build}" | sed 's/.*/          & \\/' | sed '$ s/.$//')"
-    arch_build="$(echo "${arch_build}"     | sed 's/.*/          & \\/' | sed '$ s/.$//')"
+    arch_build="$(echo "${arch_build}" | sed 's/.*/          & \\/' | sed '$ s/.$//')"
     fedora_build="$(echo "${fedora_build}" | sed 's/.*/          & \\/' | sed '$ s/.$//')"
 
     if [[ ${SEARXNG_UWSGI_USE_SOCKET} == true ]]; then
@@ -882,7 +906,7 @@ searxng.doc.rst() {
         uwsgi_variant=':socket'
     fi
 
-    eval "echo \"$(< "${REPO_ROOT}/docs/build-templates/searxng.rst")\""
+    eval "echo \"$(<"${REPO_ROOT}/docs/build-templates/searxng.rst")\""
 
     # I use ubuntu-20.04 here to demonstrate that versions are also supported,
     # normally debian-* and ubuntu-* are most the same.
@@ -897,7 +921,8 @@ searxng.doc.rst() {
             echo -e "\n.. START searxng uwsgi-description $DIST_NAME"
 
             case $DIST_ID-$DIST_VERS in
-                ubuntu-*|debian-*)  cat <<EOF
+                ubuntu-* | debian-*)
+                    cat <<EOF
 
 .. code:: bash
 
@@ -913,8 +938,9 @@ searxng.doc.rst() {
    disable:   sudo -H rm ${uWSGI_APPS_ENABLED}/${SEARXNG_UWSGI_APP}
 
 EOF
-                ;;
-                arch-*) cat <<EOF
+                    ;;
+                arch-*)
+                    cat <<EOF
 
 .. code:: bash
 
@@ -931,8 +957,9 @@ EOF
    disable:   sudo -H systemctl disable  uwsgi@${SEARXNG_UWSGI_APP%.*}
 
 EOF
-                ;;
-                fedora-*|centos-7) cat <<EOF
+                    ;;
+                fedora-* | centos-7)
+                    cat <<EOF
 
 .. code:: bash
 
@@ -945,46 +972,44 @@ EOF
    disable:   sudo -H rm ${uWSGI_APPS_ENABLED}/${SEARXNG_UWSGI_APP}
 
 EOF
-                ;;
+                    ;;
             esac
             echo -e ".. END searxng uwsgi-description $DIST_NAME"
 
-            local _show_cursor=""  # prevent from prefix_stdout's trailing show-cursor
+            local _show_cursor="" # prevent from prefix_stdout's trailing show-cursor
 
             echo -e "\n.. START searxng uwsgi-appini $DIST_NAME"
             echo ".. code:: bash"
             echo
-            eval "echo \"$(< "${TEMPLATES}/${uWSGI_APPS_AVAILABLE}/${SEARXNG_UWSGI_APP}${uwsgi_variant}")\"" | prefix_stdout "  "
+            eval "echo \"$(<"${TEMPLATES}/${uWSGI_APPS_AVAILABLE}/${SEARXNG_UWSGI_APP}${uwsgi_variant}")\"" | prefix_stdout "  "
             echo -e "\n.. END searxng uwsgi-appini $DIST_NAME"
 
             echo -e "\n.. START nginx socket"
             echo ".. code:: nginx"
             echo
-            eval "echo \"$(< "${TEMPLATES}/${NGINX_APPS_AVAILABLE}/${NGINX_SEARXNG_SITE}:socket")\"" | prefix_stdout "  "
+            eval "echo \"$(<"${TEMPLATES}/${NGINX_APPS_AVAILABLE}/${NGINX_SEARXNG_SITE}:socket")\"" | prefix_stdout "  "
             echo -e "\n.. END nginx socket"
 
             echo -e "\n.. START nginx http"
             echo ".. code:: nginx"
             echo
-            eval "echo \"$(< "${TEMPLATES}/${NGINX_APPS_AVAILABLE}/${NGINX_SEARXNG_SITE}")\"" | prefix_stdout "  "
+            eval "echo \"$(<"${TEMPLATES}/${NGINX_APPS_AVAILABLE}/${NGINX_SEARXNG_SITE}")\"" | prefix_stdout "  "
             echo -e "\n.. END nginx http"
 
             echo -e "\n.. START apache socket"
             echo ".. code:: apache"
             echo
-            eval "echo \"$(< "${TEMPLATES}/${APACHE_SITES_AVAILABLE}/${APACHE_SEARXNG_SITE}:socket")\"" | prefix_stdout "  "
+            eval "echo \"$(<"${TEMPLATES}/${APACHE_SITES_AVAILABLE}/${APACHE_SEARXNG_SITE}:socket")\"" | prefix_stdout "  "
             echo -e "\n.. END apache socket"
 
             echo -e "\n.. START apache http"
             echo ".. code:: apache"
             echo
-            eval "echo \"$(< "${TEMPLATES}/${APACHE_SITES_AVAILABLE}/${APACHE_SEARXNG_SITE}")\"" | prefix_stdout "  "
+            eval "echo \"$(<"${TEMPLATES}/${APACHE_SITES_AVAILABLE}/${APACHE_SEARXNG_SITE}")\"" | prefix_stdout "  "
             echo -e "\n.. END apache http"
         )
     done
 
 }
 
-# ----------------------------------------------------------------------------
 main "$@"
-# ----------------------------------------------------------------------------