Post commit hook for PHP CS Fixer. This will only run CS fixer on the changes made in the last commit.

post-commit

#!/usr/bin/env bash

if [[ -z "${IN_HOOK}" ]]; then

    export IN_HOOK='yes'

    REQUIRES_UNSTASH=''
    if [[ ! -z "$(git diff --no-commit-id --name-only)" ]]; then
        REQUIRES_UNSTASH='yes'
        echo '[] stash'
        git stash
    fi

    echo '[] fix'
    ./vendor/bin/php-cs-fixer fix

    echo '[] add'
    git diff-tree --no-commit-id -m --name-only -r @{0} | while read line; do
        git add "$line";
    done

    echo '[] commit'
    git commit --amend --no-edit --allow-empty

    echo '[] reset'
    git reset --hard

    if [[ -z "$(git diff-tree --no-commit-id --name-only -r @\{0\})" ]]; then
        echo '[] prune empty'
        git reset HEAD^
    fi

    if [[ ! -z "${REQUIRES_UNSTASH}" ]]; then
        echo '[] stash apply'
        git stash pop
    fi

fi