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Git pre-comit hook to lint files using npm
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| #!/usr/bin/env sh | |
| # This loads nvm | |
| export NVM_DIR="$([ -z "${XDG_CONFIG_HOME-}" ] && printf %s "${HOME}/.nvm" || printf %s "${XDG_CONFIG_HOME}/nvm")" | |
| [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" | |
| # Bypass if a merge is happening | |
| function skipIfMerging() { | |
| local isMerge="$(git rev-parse -q --verify MERGE_HEAD)" | |
| # If isMerge is a hash, a merge is ongoing | |
| if [[ ! -z "$isMerge" ]]; then | |
| exit 0 | |
| fi | |
| } | |
| function stagedFiles() { | |
| # Get staged files by extension | |
| local files=$(git diff-index --cached --name-only HEAD | grep ".*\.$1$") | |
| # Join lines by whitespace | |
| files=$(echo $files | tr '\n' ' ') | |
| # Trim last whitespace character | |
| files=$(echo $files | xargs) | |
| echo "$files" | |
| } | |
| function lintFiles() { | |
| local type=$1 | |
| # Command to run from a local or remote npm package | |
| local bin="npx $2" | |
| local args=$3 | |
| # Shifts all the positional arguments down by three | |
| shift; shift; shift | |
| # $@ is all the arguments | |
| if [[ ! -z "$@" ]]; then | |
| echo -e "\033[33mLinting $type files...\033[0m" | |
| # Invoke npm bin+binary with the staged files | |
| echo "$@" | xargs $bin $args | |
| # $? is the output of the last command | |
| if [[ ! "$?" == 0 ]]; then | |
| PASS=false | |
| fi | |
| fi | |
| } | |
| skipIfMerging | |
| PASS=true | |
| STAGED_CSS=$(stagedFiles "scss") | |
| if [[ ! -z "$STAGED_CSS" ]]; then | |
| lintFiles CSS stylelint "--allow-empty-input" $STAGED_CSS | |
| fi | |
| STAGED_JS=$(stagedFiles "jsx\?") | |
| if [[ ! -z "$STAGED_JS" ]]; then | |
| lintFiles JS eslint "--no-error-on-unmatched-pattern --color" $STAGED_JS | |
| fi | |
| if ! $PASS; then | |
| echo -e "\033[41m\033[1mCOMMIT FAILED:\033[0m \033[1mYour commit contains files that did not pass the linter check. Please fix the errors and try again.\033[0m\n" | |
| exit 1 | |
| fi | |
| exit $? |
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