php-cs-fixer git pre commit hook

.php_cs

<?php

return Symfony\CS\Config\Config::create()
    ->level(Symfony\CS\FixerInterface::SYMFONY_LEVEL)
    ->fixers([
        'short_array_syntax',
        'ordered_use',
    ])
;

pre-commit

#!/usr/bin/env bash

ROOT="/path/to/your/code"

echo "php-cs-fixer pre commit hook start"

PHP_CS_FIXER="vendor/bin/php-cs-fixer"
HAS_PHP_CS_FIXER=false

if [ -x vendor/bin/php-cs-fixer ]; then
    HAS_PHP_CS_FIXER=true
fi

if $HAS_PHP_CS_FIXER; then
    git status --porcelain | grep -e '^[AM]\(.*\).php$' | cut -c 3- | while read line; do
        $PHP_CS_FIXER fix --config-file=$ROOT/.php_cs --verbose "$line";
        git add "$line";
    done
else
    echo ""
    echo "Please install php-cs-fixer, e.g.:"
    echo ""
    echo "  composer require --dev fabpot/php-cs-fixer:dev-master"
    echo ""
fi

echo "php-cs-fixer pre commit hook finish"

With the --config option you can specify the path to the .php_cs file. in new version.

the ROOT variable is not so necessary:
https://stackoverflow.com/questions/7065224/in-a-git-hook-is-the-current-working-directory-guaranteed-to-be-within-the-git-r

I found the running of the php-cs-fixer per line unnecessary slow, changed it to this:

FILES=` git status --porcelain | grep -e '^[AM]\(.*\).php$' | cut -c 3- | tr '\n' ' '`
$PHP_CS_FIXER fix --config=.php_cs ${FILES}
git add ${FILES}

This simplifies the git lines into one single line, because php-cs-fixer can accept multiple paths. It's faster.

if no php file exists in commit, php-cs-fixer run all over the php files of the repo. To avoid this, check FILES to not null then run php-cs-fixer.

FILES=` git status --porcelain | grep -e '^[AM]\(.*\).php$' | cut -c 3- | tr '\n' ' '`
	if [ -z "$FILES" ]
	then
		  echo "php files not found."
	else
		  $PHP_CS_FIXER fix --config=.php_cs --verbose ${FILES}
		  git add ${FILES}
	fi

for more information visit here

I put all the comments together into one script. You can also just include the directories you want enclosed in () and separated by | One problem might be too many files in a commit to specify on a command line, but I did not see any file input options for phpcsfixer.

#!/usr/bin/env bash

echo "php-cs-fixer pre commit hook start"

PHP_CS_FIXER="vendor/bin/php-cs-fixer"
HAS_PHP_CS_FIXER=false

if [ -x $PHP_CS_FIXER ]; then
    HAS_PHP_CS_FIXER=true
fi

if $HAS_PHP_CS_FIXER; then
    FILES=` git status --porcelain | grep -E '^[AM] +(App|public|Tests|views).*\.php$' | cut -c 4- | tr '\n' ' '`
    if [ -z "$FILES" ]
	then
		  echo "No php files found in commit."
	else
		  echo ${FILES}
		  $PHP_CS_FIXER fix --config=.php_cs.dist --verbose ${FILES}
		  git add ${FILES}
	fi
else
    echo ""
    echo "Please install php-cs-fixer, e.g.:"
    echo ""
    echo "  composer require --dev fabpot/php-cs-fixer:dev-master"
    echo ""
    exit 1
fi

echo "php-cs-fixer pre commit hook finish"

This script has worked well for us. However, I did run into one odd behavior. This script will lint and commit all the PHP files that have changed, even if those files are not staged for commit. This tweak lints only staged files:

FILES=`git status --porcelain=v2 | grep -E '^\d [AM].*(App|public|Tests|views).*\.php$' | cut -d ' ' -f 9 | tr '\n' ' '`

We also found that merge commits could end up linting tons of files. We elected to skip merge commits:

if git rev-parse -q --verify MERGE_HEAD; then
    echo "This is a merge commit. Skipping linting just in case it's a big one!"
    exit 0
fi

Grep pattern is missing heading whitespace:

# instead of 
grep -e '^[AM]\(.*\).php$'

# do
grep -e '^\s*[AM]\(.*\).php$'

Actually, ls-files does a better job:

git ls-files -m | grep -e '.php$' | xargs vendor/bin/php-cs-fixer fix

use lint staged is also a nice solution https://sebastiandedeyne.com/running-php-cs-fixer-on-every-commit-with-husky-and-lint-staged/