[doc] improve documentation of make targets and ./manage script

BTW force modularization of the ./mange script into sub modules:

- utils/lib_sxng_data.sh
- utils/lib_sxng_node.sh
- utils/lib_sxng_static.sh
- utils/lib_sxng_test.sh
- utils/lib_sxng_themes.sh

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

utils/lib_sxng_test.sh

@@ -0,0 +1,111 @@
+test.help(){
+    cat <<EOF
+test.:
+  yamllint  : lint YAML files (YAMLLINT_FILES)
+  pylint    : lint PYLINT_FILES, searx/engines, searx & tests
+  pyright   : static type check of python sources
+  black     : check black code format
+  unit      : run unit tests
+  coverage  : run unit tests with coverage
+  robot     : run robot test
+  rst       : test .rst files incl. README.rst
+  clean     : clean intermediate test stuff
+EOF
+}
+
+test.yamllint() {
+    build_msg TEST "[yamllint] \$YAMLLINT_FILES"
+    pyenv.cmd yamllint --strict --format parsable "${YAMLLINT_FILES[@]}"
+    dump_return $?
+}
+
+test.pylint() {
+    # shellcheck disable=SC2086
+    (   set -e
+        build_msg TEST "[pylint] \$PYLINT_FILES"
+        pyenv.activate
+        python ${PYLINT_OPTIONS} ${PYLINT_VERBOSE} \
+            --additional-builtins="${PYLINT_ADDITIONAL_BUILTINS_FOR_ENGINES}" \
+            "${PYLINT_FILES[@]}"
+
+        build_msg TEST "[pylint] searx/engines"
+        python ${PYLINT_OPTIONS} ${PYLINT_VERBOSE} \
+            --disable="${PYLINT_SEARXNG_DISABLE_OPTION}" \
+            --additional-builtins="${PYLINT_ADDITIONAL_BUILTINS_FOR_ENGINES}" \
+            searx/engines
+
+        build_msg TEST "[pylint] searx tests"
+        python ${PYLINT_OPTIONS} ${PYLINT_VERBOSE} \
+            --disable="${PYLINT_SEARXNG_DISABLE_OPTION}" \
+	    --ignore=searx/engines \
+	    searx tests
+    )
+    dump_return $?
+}
+
+test.pyright() {
+    build_msg TEST "[pyright] static type check of python sources"
+    node.env.dev
+    # We run Pyright in the virtual environment because Pyright
+    # executes "python" to determine the Python version.
+    build_msg TEST "[pyright] suppress warnings related to intentional monkey patching"
+    pyenv.cmd npx --no-install pyright -p pyrightconfig-ci.json \
+        | grep -v ".py$" \
+        | 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'
+    dump_return $?
+}
+
+test.black() {
+    build_msg TEST "[black] \$BLACK_TARGETS"
+    pyenv.cmd black --check --diff "${BLACK_OPTIONS[@]}" "${BLACK_TARGETS[@]}"
+    dump_return $?
+}
+
+test.unit() {
+    build_msg TEST 'tests/unit'
+    pyenv.cmd python -m nose2 -s tests/unit
+    dump_return $?
+}
+
+test.coverage() {
+    build_msg TEST 'unit test coverage'
+    (   set -e
+        pyenv.activate
+        python -m nose2 -C --log-capture --with-coverage --coverage searx -s tests/unit
+        coverage report
+        coverage html
+    )
+    dump_return $?
+}
+
+test.robot() {
+    build_msg TEST 'robot'
+    gecko.driver
+    PYTHONPATH=. pyenv.cmd python -m tests.robot
+    dump_return $?
+}
+
+test.rst() {
+    build_msg TEST "[reST markup] ${RST_FILES[*]}"
+    for rst in "${RST_FILES[@]}"; do
+        pyenv.cmd rst2html.py --halt error "$rst" > /dev/null || die 42 "fix issue in $rst"
+    done
+}
+
+test.pybabel() {
+    TEST_BABEL_FOLDER="build/test/pybabel"
+    build_msg TEST "[extract messages] pybabel"
+    mkdir -p "${TEST_BABEL_FOLDER}"
+    pyenv.cmd pybabel extract -F babel.cfg -o "${TEST_BABEL_FOLDER}/messages.pot" searx
+}
+
+test.clean() {
+    build_msg CLEAN  "test stuff"
+    rm -rf geckodriver.log .coverage coverage/
+    dump_return $?
+}
+