pre-commit

#!/bin/bash
#
# A pre-commit hook to verify coding standards.
#

if git rev-parse --verify HEAD >/dev/null 2>&1; then
    against=HEAD
else
    # diff against the empty tree sha
    against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
fi

if ! type php &> /dev/null; then
    echo "php does not exist or is not in path"
    echo "You can bypass this hook with the --no-verify option"
    exit 1
fi

if ! type phpcs &> /dev/null; then
    echo "phpcs does not exist or is not in path"
    echo "You can bypass this hook with the --no-verify option"
    exit 1
fi

if ! type jshint &> /dev/null; then
    echo "jshint does not exist or is not in path"
    echo "You can bypass this hook with the --no-verify option"
    exit 1
fi

if ! type csslint &> /dev/null; then
    echo "csslint does not exist or is not in path"
    echo "You can bypass this hook with the --no-verify option"
    exit 1
fi

# dash does not support $'\n':
# http://forum.soft32.com/linux2/Bug-409179-DASH-Settings-IFS-work-properly-ftopict70039.html
IFS='
'
PHP_ERRORS=''
PHPCS_ERRORS=''
JS_ERRORS=''
CSS_ERRORS=''
PHPCS_PATH=$(git config --get ayi.phpcs)
error=0

# get a list of staged files
for line in $(git diff-index --cached --full-index $against); do
    # split needed values
    sha=$(echo $line | cut -d' ' -f4)
    temp=$(echo $line | cut -d' ' -f5)
    status=$(echo $temp | cut -f1)
    filename=$(echo $temp | cut -f2)
    ext=$(echo $filename | sed 's/^.*\.//')
    clean_filename="$(echo $filename | sed 's/\//\\\//g')"

    if [[ $status = "D" ]]; then
        continue
    fi

    # check php files with php -l and phpcs
    if [[ "$ext" == "php" || "$ext" == "ctp" ]]; then
        modified_file="$(git cat-file -p $sha)"

        result="$(echo "$modified_file" | php -l 2>&1)"
        phplint_exit=$?

        if [[ $phplint_exit -ne 0 ]]; then
            error=1
            PHP_ERRORS="$(echo "$PHP_ERRORS"; echo "PHP $(echo "$result" | sed "s/in - on/in $clean_filename on/g")")"
        fi

        phpcs_result="$(echo "$modified_file" | phpcs -sn --standard=VIA 2>&1)"
        if [[ $? -ne 0 ]]; then
            error=1
            PHPCS_ERRORS="$(echo "$PHPCS_ERRORS"; echo "$phpcs_result" | sed 's/STDIN/'$clean_filename'/g' | sed 's/^Time:.*$//g')"
        fi
    fi

    # check js files with jshint
    if [[ "$ext" == "js" || "$ext" == "html" ]]; then
        result=$(git cat-file -p $sha | jshint "$filename" 2>&1)
        if [[ $? -ne 0 ]]; then
            error=1
            JS_ERRORS=$(echo "$JS_ERRORS";  echo "$filename"; echo "$result" | sed 's/^.*'$clean_filename': //g' | sed 's/^[0-9]* error.*//g')
        fi
    fi

    # check css files with csslint
    if [[ "$ext" == "css" ]]; then
        # check the staged file content for syntax errors using csslint
        result=$(git cat-file -p $sha | csslint --format=compact --errors=errors "$filename" 2>&1)
        if [[ $? -ne 0 ]]; then
            error=1
            CSS_ERRORS=$(echo "$CSS_ERRORS"; echo "$filename"; echo "$result" | sed 's/^.*'$clean_filename': //g')
        fi
    fi
done
unset IFS

if [[ $error -eq 1 ]]; then
    if [ -n "$PHP_ERRORS" ] ; then
        echo "$PHP_ERRORS"
    fi

    if [ -n "$PHPCS_ERRORS" ] ; then
        echo "$PHPCS_ERRORS"
    fi

    if [ -n "$JS_ERRORS" ] ; then
        echo "$JS_ERRORS"
    fi

    if [ -n "$CSS_ERRORS" ] ; then
        echo "$CSS_ERRORS"
    fi

    echo
    exit 1
fi