Git Hook - PHP Syntax Checker (pre-commit)

gistfile1.txt

echo ""
echo "******************************"
echo "** Running PHP Syntax Check **"
echo "******************************"

if [ -z "$PHP_BIN" ]
then
        PHP_BIN=php
fi

if [ "$(echo -e test)" = test ]
then
        echo_e="echo -e"
else
        echo_e="echo"
fi

# necessary check for initial commit
if git rev-parse --verify HEAD >/dev/null 2>&1
then
        against=HEAD
else
        # Initial commit: diff against an empty tree object
        against=4b825dc642cb6eb9a060e54bf8d69288fbee4904
fi

errors=""
if ! which "$PHP_BIN" >/dev/null 2>&1
then
        echo "PHP Syntax check failed:"
        echo "PHP binary does not exist or is not in path: $PHP_BIN"
        exit 1
fi

# dash does not support $'\n':
# http://forum.soft32.com/linux2/Bug-409179-DASH-Settings-IFS-work-properly-ftopict70039.html
IFS='
'
# 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 $temp | cut -d'   ' -f1)
        filename=$(echo $temp | cut -d' ' -f2)

        # file extension
        ext=$(echo $filename | sed 's/^.*\.//')

        # only check files with php extension
        if [ $ext != "php" ]
        then
                continue
        fi

        # do not check deleted files
        if [ $status = "D" ]
        then
                continue
        fi

        # check the staged file content for syntax errors
        # using php -l (lint)
        result=$(git cat-file -p $sha | "$PHP_BIN" -n -l -ddisplay_errors\=1 -derror_reporting\=E_ALL -dlog_errrors\=0 2>&1)
        if [ $? -ne 0 ]
        then
                # Swap back in correct filenames
                errors=$(echo "$errors"; echo "$result" | grep ':' | sed -e "s@in - on@in $filename on@g")
        fi
done
unset IFS

if [ -n "$errors" ]
then
        echo "!! PHP Syntax check failed !!"
        $echo_e "$errors"
        echo ""
        exit 1
fi

echo "Syntax Check Completed!"
echo ""