implement automatic shellcheck linting

.github/workflows/docker.yml

@@ -48,6 +48,7 @@ jobs:
         uses: ludeeus/action-shellcheck@master
         env:
           SHELLCHECK_OPTS: --shell=bash --external-sources
+          INPUT_ADDITIONAL_FILE_ARGS: -o -name '*.envsh'
         with:
           scandir: ./docker/
 

docker/shared/root/docker/install/php-extensions.sh

@@ -32,16 +32,20 @@ fi
 pecl install "${PHP_PECL_EXTENSIONS}" "${PHP_PECL_EXTENSIONS_EXTRA}"
 
 # PHP extensions (dependencies)
+#
+# shellcheck disable=SC2086
 docker-php-ext-install \
     -j "$(nproc)" \
-    "${PHP_EXTENSIONS}" \
-    "${PHP_EXTENSIONS_EXTRA}" \
-    "${PHP_EXTENSIONS_DATABASE}"
+    ${PHP_EXTENSIONS} \
+    ${PHP_EXTENSIONS_EXTRA} \
+    ${PHP_EXTENSIONS_DATABASE}
 
 # Enable all extensions
+#
+# shellcheck disable=SC2086
 docker-php-ext-enable \
-    "${PHP_PECL_EXTENSIONS}" \
-    "${PHP_PECL_EXTENSIONS_EXTRA}" \
-    "${PHP_EXTENSIONS}" \
-    "${PHP_EXTENSIONS_EXTRA}" \
-    "${PHP_EXTENSIONS_DATABASE}"
+    ${PHP_PECL_EXTENSIONS} \
+    ${PHP_PECL_EXTENSIONS_EXTRA} \
+    ${PHP_EXTENSIONS} \
+    ${PHP_EXTENSIONS_EXTRA} \
+    ${PHP_EXTENSIONS_DATABASE}