[enh] sh: add shell formatter

Related https://github.com/searxng/searxng/issues/4803

.devcontainer/Dockerfile

@@ -1,4 +1,4 @@
 FROM mcr.microsoft.com/devcontainers/base:debian
 
 RUN apt-get update && \
-    apt-get -y install python3 python3-venv valkey firefox-esr graphviz imagemagick librsvg2-bin fonts-dejavu shellcheck
+    apt-get -y install python3 python3-venv valkey firefox-esr graphviz imagemagick librsvg2-bin fonts-dejavu shellcheck shfmt

.editorconfig

@@ -50,3 +50,6 @@ max_line_length = 79
 
 [*.yml]
 indent_size = 2
+
+[[shell]]
+switch_case_indent = true

.github/workflows/integration.yml

@@ -34,6 +34,9 @@ jobs:
           - "3.13"
 
     steps:
+      - name: Install shfmt
+        run: sudo apt-get install -y shfmt
+
       - name: Setup Python
         uses: actions/setup-python@v5
         with:

Makefile

@@ -50,8 +50,8 @@ search.checker.%: install
 	$(Q)./manage pyenv.cmd searxng-checker -v "$(subst _, ,$(patsubst search.checker.%,%,$@))"
 
 PHONY += test ci.test test.shell
-ci.test: test.yamllint test.black test.types.ci  test.pylint test.unit test.robot test.rst test.shell test.pybabel
-test:    test.yamllint test.black test.types.dev test.pylint test.unit test.robot test.rst test.shell
+ci.test: test.yamllint test.shfmt test.black test.types.ci  test.pylint test.unit test.robot test.rst test.shell test.pybabel
+test:    test.yamllint test.shfmt test.black test.types.dev test.pylint test.unit test.robot test.rst test.shell
 test.shell:
 	$(Q)shellcheck -x -s dash \
 		container/entrypoint.sh
@@ -82,8 +82,8 @@ MANAGE += gecko.driver
 MANAGE += node.env node.env.dev node.clean
 MANAGE += py.build py.clean
 MANAGE += pyenv pyenv.install pyenv.uninstall
-MANAGE += format.python
-MANAGE += test.yamllint test.pylint test.black test.pybabel test.unit test.coverage test.robot test.rst test.clean test.themes test.types.dev test.types.ci
+MANAGE += format.python format.shell
+MANAGE += test.yamllint test.pylint test.shfmt test.black test.pybabel test.unit test.coverage test.robot test.rst test.clean test.themes test.types.dev test.types.ci
 MANAGE += themes.all themes.simple themes.fix themes.lint themes.test
 MANAGE += static.build.commit static.build.drop static.build.restore
 MANAGE += nvm.install nvm.clean nvm.status nvm.nodejs

docs/admin/buildhosts.rst

@@ -161,3 +161,33 @@ To lint shell scripts we use ShellCheck_ - a shell script static analysis tool
          $ sudo dnf install ShellCheck
 
 .. SNAP sh lint requirements
+
+.. _sh format:
+
+Format shell scripts
+====================
+
+.. _shfmt: https://github.com/mvdan/sh
+
+To format shell scripts we use shfmt_ - a shell script parser & formatter
+(:ref:`install buildhost <searxng.sh install buildhost>`).
+
+.. tabs::
+
+   .. group-tab:: Ubuntu / debian
+
+      .. code-block:: sh
+
+         $ sudo apt install shfmt
+
+   .. group-tab:: Arch Linux
+
+      .. code-block:: sh
+
+         $ sudo pacman -S shfmt
+
+   .. group-tab::  Fedora / RHEL
+
+      .. code-block:: sh
+
+         $ sudo dnf install shfmt

manage

@@ -51,6 +51,14 @@ GECKODRIVER_VERSION="v0.35.0"
 # SPHINXOPTS=
 BLACK_OPTIONS=("--target-version" "py311" "--line-length" "120" "--skip-string-normalization")
 BLACK_TARGETS=("--exclude" "(searx/static|searx/languages.py)" "--include" 'searxng.msg|\.pyi?$' "searx" "searxng_extra" "tests")
+SHFMT_TARGETS=(
+    "./container/"
+    "./docs/"
+    "./searx/"
+    "./searxng_extra/"
+    "./tests/"
+    "./utils/"
+    "./manage")
 
 YAMLLINT_FILES=()
 while IFS= read -r line; do
@@ -218,11 +226,17 @@ pyenv.uninstall() {
 }
 
 format.python() {
-    build_msg TEST "[format.python] black \$BLACK_TARGETS"
+    build_msg TEST "[format.python] black ${BLACK_TARGETS[*]}"
     pyenv.cmd black "${BLACK_OPTIONS[@]}" "${BLACK_TARGETS[@]}"
     dump_return $?
 }
 
+format.shell() {
+    build_msg TEST "[format.shell] shfmt ${SHFMT_TARGETS[*]}"
+    shfmt --list --write --apply-ignore --simplify "${SHFMT_TARGETS[@]}"
+    dump_return $?
+}
+
 docs.prebuild() {
     build_msg DOCS "build ${DOCS_BUILD}/includes"
     (

utils/lib_sxng_test.sh

@@ -8,6 +8,7 @@ test.:
   pylint    : lint ./searx, ./searxng_extra and ./tests
   pyright   : static type check of python sources (.dev or .ci)
   black     : check black code format
+  shfmt     : check shfmt code format
   unit      : run unit tests
   coverage  : run unit tests with coverage
   robot     : run robot test
@@ -100,11 +101,17 @@ test.types.ci() {
 }
 
 test.black() {
-    build_msg TEST "[black] \$BLACK_TARGETS"
+    build_msg TEST "[black] ${BLACK_TARGETS[*]}"
     pyenv.cmd black --check --diff "${BLACK_OPTIONS[@]}" "${BLACK_TARGETS[@]}"
     dump_return $?
 }
 
+test.shfmt() {
+    build_msg TEST "[shfmt] ${SHFMT_TARGETS[*]}"
+    shfmt --list --diff --apply-ignore --simplify "${SHFMT_TARGETS[@]}"
+    dump_return $?
+}
+
 test.unit() {
     build_msg TEST 'tests/unit'
     # shellcheck disable=SC2086

utils/searxng.sh

@@ -66,7 +66,7 @@ git build-essential libxslt-dev zlib1g-dev libffi-dev libssl-dev"
 SEARXNG_BUILD_PACKAGES_debian="\
 graphviz imagemagick texlive-xetex librsvg2-bin
 texlive-latex-recommended texlive-extra-utils fonts-dejavu
-latexmk shellcheck"
+latexmk shellcheck shfmt"
 
 # pacman packages
 
@@ -77,7 +77,7 @@ git base-devel libxml2"
 
 SEARXNG_BUILD_PACKAGES_arch="\
 graphviz imagemagick texlive-bin extra/librsvg
-texlive-core texlive-latexextra ttf-dejavu shellcheck"
+texlive-core texlive-latexextra ttf-dejavu shellcheck shfmt"
 
 # dnf packages
 
@@ -90,7 +90,7 @@ SEARXNG_BUILD_PACKAGES_fedora="\
 graphviz graphviz-gd ImageMagick librsvg2-tools
 texlive-xetex-bin texlive-collection-fontsrecommended
 texlive-collection-latex dejavu-sans-fonts dejavu-serif-fonts
-dejavu-sans-mono-fonts ShellCheck"
+dejavu-sans-mono-fonts ShellCheck shfmt"
 
 case $DIST_ID-$DIST_VERS in
     ubuntu-18.04)