traefik/script/validate-shell-script.sh

#!/usr/bin/env bash

set -eu -o pipefail

script_dir="$( cd "$( dirname "${0}" )" && pwd -P)"

if command -v shellcheck
then
    exit_code=0
    # The list of shell script come from the (grep ...) command, feeding the loop
    while IFS= read -r script_to_check
    do
        # The shellcheck command are run in background, to have an overview of the linter (instead of a fail at first issue)
        shellcheck "${script_to_check}" &
    done < <( # Search all the repository for sh and bash shebangs, excluding .js and .md files
        # the folders ".git", "vendor" and "node_modules" are also ignored
        grep -rI '#!/' "${script_dir}"/.. \
        | grep 'sh' | grep -v '.js' | grep -v '.md' \
        | grep -v '.git/' | grep -v 'vendor/'  | grep -v 'node_modules/' \
        | cut -d':' -f1
    )
    # Wait for all background command to be completed
    for p in $(jobs -p)
    do
        wait "$p" || exit_code=$?
    done
    exit $exit_code
else
    echo "== Command shellcheck not found in your PATH. No shell script checked."
    exit 1
fi