Some git-hooks for php development

post-receive

#!/bin/sh
# /var/git/$REPONAME.git/hooks/
# This script just multiplexes the hook to multiple sub-scripts, since you can only have one hooks/post-receive
while read oldrev newrev refname
do
        echo $oldrev $newrev $refname | /usr/share/doc/git-core/contrib/hooks/post-receive-email
        echo $oldrev $newrev $refname | /home/buildbot/buildbot/scripts/post-receive-hook
done

post-receive-hook

#!/usr/bin/env php
<?php
// /home/buildbot/buildbot/scripts/post-receive-hook
require_once(dirname(realpath(__FILE__)).'/../bootstrap.inc.php');
$REPOSITORY = basename(getcwd());
foreach (explode("\n", trim(file_get_contents("php://stdin"))) as $line) {
  list($OLDREV, $NEWREV, $REFNAME) = explode(" ", $line);
  $sth = db()->prepare("insert into queue (oldrev, newrev, refname, repository, queued_at, result, build_started_at, build_completed_at, output) values (?, ?, ?, ?, now(), null, null, null, null)");
  $sth->execute(array($OLDREV, $NEWREV, $REFNAME, $REPOSITORY));
}

pre-receive

#!/usr/bin/env php
<?php
// /var/git/$REPONAME.git/hooks/pre-receive
// Runs various checks on the inbound push and rejects if it isn't found credible
// There are some edge cases unhandled, so you may have to disable for some push'es

function verbose($str) {
  // echo $str, "\n";
}

function exec_proc($command, $stdin = null) {
  $descriptorspec = array(
    0 => array("pipe", "r"), // stdin
    1 => array("pipe", "w"), // stdout
    2 => array("pipe", "w") // stderr
  );
  $process = proc_open($command, $descriptorspec, $pipes);
  if (is_resource($process)) {
    if ($stdin) {
      fwrite($pipes[0], $stdin);
    }
    fclose($pipes[0]);
    $stdout = stream_get_contents($pipes[1]);
    fclose($pipes[1]);
    $stderr = stream_get_contents($pipes[2]);
    fclose($pipes[2]);
    $exit_code = proc_close($process);
    return array($exit_code, $stdout, $stderr);
  }
  throw new Exception("Unable to open subprocess");
}

function git() {
  $args = func_get_args();
  $command = "git " . implode(" ", array_map('escapeshellarg', $args));
  verbose("> {$command}");
  return exec_proc($command);
}

function get_changed_files($base, $commit) {
  list($code, $stdout, $stderr) = git('diff', '--numstat', '--name-only', '--diff-filter=ACMRTUXB', '--ignore-submodules', "{$base}..{$commit}");
  if ($code != 0) {
    echo $stderr;
    echo $stdout;
    throw new Exception("Subprocess exited with error");
  }
  return explode("\n", $stdout);
}

function get_new_file($filename, $commit) {
  list($code, $stdout, $stderr) = git('show', "{$commit}:{$filename}");
  if ($code != 0) {
    echo $stderr;
    echo $stdout;
    throw new Exception("Subprocess exited with error");
  }
  return $stdout;
}

function store_file($fname, $contents) {
  global $tmpdir;
  if ($tmpdir === null) {
    $tmpdir = tempnam("/tmp", "php");
    unlink($tmpdir);
    mkdir($tmpdir);
  }
  $fullname = $tmpdir.'/'.$fname;
  if (!is_dir(dirname($fullname))) {
    mkdir(dirname($fullname), 0777, true);
  }
  file_put_contents($fullname, $contents);
  return $fullname;
}

function php_lint($filename) {
  $command = "php -l " . escapeshellarg($filename);
  verbose("> {$command}");
  list($code, $stdout, $stderr) = exec_proc($command);
  if ($code != 0) {
    echo trim($stdout), "\n";
  }
  return $code == 0;
}

function detect_conflict_markers($fname, $contents) {
  $result = true;
  $linenum = 0;
  foreach (explode("\n", $contents) as $line) {
    $linenum++;
    if (preg_match('/^(<<<<<<<|>>>>>>>)/', $line)) {
      echo "Leftover conflict marker found in {$fname} on line {$linenum}\n";
      $result = false;
    }
  }
  return $result;
}

$line = file_get_contents('php://stdin');
list($base, $commit, $ref) = explode(" ", trim($line));
if ($base == "0000000000000000000000000000000000000000") {
  verbose("Initial push received. Expecting everything to be fine");
  exit;
}
$modified = get_changed_files($base, $commit);

$result = true;

foreach ($modified as $fname) {
  $contents = get_new_file($fname, $commit);
  if (preg_match('/[.]php$/', $fname)) {
    $filename = store_file($fname, $contents);
    $result = php_lint($filename) && $result;
  }
  $result = detect_conflict_markers($fname, $contents) && $result;
}

if (isset($tmpdir)) {
  $command = "rm -rf ".escapeshellarg($tmpdir);
  exec_proc($command);
  verbose("> {$command}");
}

if (!$result) {
  echo "Aborting.\n";
  exit(1);
}