dotfiles/resources/git-hooks/pre-commit

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#!/usr/bin/env php
<?php
/**
* .git/hooks/pre-commit
*
* This pre-commit hooks will check for PHP errors (lint), and make sure the
* code is PSR-2 compliant.
*
* @author Reen Lokum http://github.com/reenl
*
* The orignal version of this file can be found at:
* https://github.com/zendframework/zf2/blob/master/README-GIT.md
*
* Extended with functionality found at:
* http://kvz.io/blog/2013/12/29/one-git-commit-hook-to-rule-them-all/
*/
$exit = 0;
// Initial commit
$against = '4b825dc642cb6eb9a060e54bf8d69288fbee4904';
if (run('git rev-parse --verify HEAD > /dev/null')) {
$against = 'HEAD';
}
// Only run when we're on a branch (to avoid rebase hell)
// http://git-blame.blogspot.nl/2013/06/checking-current-branch-programatically.html
$branch = run('git symbolic-ref --short -q HEAD');
if (!$branch) {
writeln('Not on any branch');
exit(0);
}
/*
* collect all files which have been added, copied or
* modified and store them in an array called output
*/
$diffLines = array();
exec('git diff-index --cached --full-index --diff-filter=ACM '.$against, $diffLines);
writeln();
// Filter files that don't need a check.
foreach ($diffLines as $line) {
$partList = preg_split('#\s+#', $line, 6);
$hash = $partList[3];
$status = $partList[4];
$fileName = $partList[5];
if ('D' === $status) {
// deleted file; do nothing
continue;
}
$type = strtolower(pathinfo($fileName, PATHINFO_EXTENSION));
$validator = 'validator_'.$type;
if (!$type || !function_exists($validator)) {
$type = run("git cat-file -p ".$hash." | head -n1 | awk -F/ '/^#\!/ {print \$NF}' | sed 's/^env //g'");
$validator = 'validator_'.$type;
if (!function_exists($validator)) {
// No validator
writeln(' Skipping "'.format($fileName, 'green').'" no validator available.');
continue;
}
}
write(' Checking "'.format($fileName, 'green').'" with validator '.format($type, 'green').'.');
$output = '';
if (!$validator($hash, $fileName, $output)) {
writeln(PHP_EOL.'X ERROR '.implode(PHP_EOL.' ', explode(PHP_EOL, $output)).PHP_EOL, 'red');
$exit = 1;
continue;
}
writeln(' OK', 'green');
}
if ($exit > 0) {
writeln(PHP_EOL."Please fix the above errors and run 'git add'.", 'gray');
}
exit($exit);
function validator_php($hash, $fileName, &$output)
{
if (validator_php_syntax($hash, $fileName, $output)) {
return validator_php_cs($hash, $fileName, $output);
}
return false;
}
function validator_php_syntax($hash, $fileName, &$output)
{
$output = '';
$exitCode = 0;
$result = run('git cat-file -p '.escapeshellarg($hash).' | php -l', $output, $exitCode, "purge", "default");
if ($result) {
return true;
}
$output = 'Syntax Error'.PHP_EOL.$output;
return false;
}
function validator_php_cs($hash, $fileName, &$output)
{
// Use .php_cs config if project has one.
$configFile = '';
if (file_exists('.php_cs')) {
$configFile = ' --config-file='.escapeshellarg(realpath('.php_cs'));
}
$tmpDir = '/tmp/cs-check/'.$hash;
$tmp = $tmpDir.'/'.$fileName;
run('mkdir -p '.dirname($tmp));
run('git cat-file -p '.escapeshellarg($hash).' > '.$tmp);
$return = null;
run('php-cs-fixer fix --dry-run --verbose --level=symfony'.$configFile.' '.escapeshellarg($tmp), $currentOutput, $return, 'default', 'default');
run('rm -rf '.escapeshellarg($tmpDir));
// Check output
if ($return !== 0) {
$out = explode(PHP_EOL, $currentOutput);
$rule = null;
foreach ($out as $line) {
if (preg_match('#\s+[0-9]+\)\s#', $line)) {
$rule = $line;
break;
}
}
if ($rule !== null && preg_match('#\((.*)\)#', $rule, $matches)) {
$output = 'Code Style errors'.PHP_EOL.$matches[1];
} else {
$output = 'Code Style errors'.PHP_EOL.implode(PHP_EOL, $out).PHP_EOL;
}
return false;
}
return true;
}
/**
* Runs like exec with a few changes:
* - Output is returned as a string.
* - Output is NOT appended.
* - STDERR is also added to the output.
* - STDERR and/or STDOUT can be disabled by passing purge.
* - Returns the first output line if successful and false when failed.
* - If no output is generated and the exit status equals 0 then true is returned.
*
* @param string $command
* @param string &$output
* @param int &$exitCode
* @param string $stdout
* @param string $stderr
*
* @return boolean
*/
function run($command, &$output = '', &$exitCode = 0, $stdout = 'default', $stderr = 'purge')
{
$descriptors = array(
0 => array("pipe", "r"), // stdin
1 => array("pipe", "w"), // stdout
2 => array("pipe", "w"), // stderr
);
$pipes = array();
$out = array();
$process = proc_open($command, $descriptors, $pipes);
fclose($pipes[0]);
unset($pipes[0]);
do {
$read = $pipes;
$write = $except = array();
if (!stream_select($read, $write, $except, 5)) {
writeln('Timeout on process: '.$command, 'red');
break;
}
foreach ($read as $pipe) {
$pipeId = array_search($pipe, $pipes);
if ($pipeId === false) {
writeln('Unable to determine where the output came from.', 'red');
}
if (feof($pipe)) {
fclose($pipe);
if ($pipeId !== false) {
unset($pipes[$pipeId]);
}
continue;
}
$line = fgets($pipe);
if ($line === false) {
continue;
}
$color = $stderr;
if ($pipeId == 1) {
$color = $stdout;
}
if ($color != 'purge') {
$out[] = format(rtrim($line), $color);
}
}
} while (count($pipes) > 0);
$exitCode = proc_close($process);
$output = implode(PHP_EOL, $out);
if ($exitCode == 0) {
if (!isset($out[0]) || $out[0] == '') {
return true;
}
return $out[0];
}
return false;
}
function format($string, $color = 'default')
{
if ($color == 'default') {
return $string;
}
if ($color == 'purge') {
return '';
}
$colors = array(
'gray' => 37,
'green' => 32,
'red' => 31,
);
if (!isset($colors[$color])) {
writeln($color.' is not a valid color.');
exit(1);
}
return chr(0x1B).'['.$colors[$color].'m'.$string.chr(0x1B).'[m';
}
function writeln($write = '', $color = 'default')
{
write($write.PHP_EOL, $color);
}
function write($write = '', $color = 'default')
{
echo format($write, $color);
flush();
}