inc/functions.php

   1 <?php
   2 /** @file
   3  * Functions used by ViewGit.
   4  */
   5
   6 function debug($msg)
   7 {
   8         global $conf;
   9
  10         if ($conf['debug']) {
  11                 file_put_contents('php://stderr', strftime('%H:%M:%S') ." viewgit: $_SERVER[REMOTE_ADDR]:$_SERVER[REMOTE_PORT] $msg\n", FILE_APPEND);
  12         }
  13 }
  14
  15 function fix_encoding($in_str)
  16 {
  17         if (function_exists("mb_detect_encoding") && function_exists("mb_check_encoding")) {
  18                 $cur_encoding = mb_detect_encoding($in_str) ;
  19                 if($cur_encoding == "UTF-8" && mb_check_encoding($in_str,"UTF-8")) {
  20                         return $in_str;
  21                 } else {
  22                         return utf8_encode($in_str);
  23                 }
  24         } else {
  25                 return utf8_encode($in_str);
  26         }
  27 }
  28
  29 /**
  30  * Format author's name & wrap it to links etc.
  31  */
  32 function format_author($author)
  33 {
  34         global $page;
  35
  36         if (isset($page['project'])) {
  37                 // FIXME 'h' - use only if available
  38                 return '<a href="'. makelink(array('a' => 'search', 'p' => $page['project'], 'h' => 'HEAD', 'st' => 'author', 's' => $author)) .'">'. htmlentities_wrapper($author) .'</a>';
  39         } else {
  40                 return htmlentities_wrapper($author);
  41         }
  42 }
  43
  44 /**
  45  * Formats "git diff" output into xhtml.
  46  * @return array(array of filenames, xhtml)
  47  */
  48 function format_diff($text)
  49 {
  50         $files = array();
  51
  52         // match every "^diff --git a/<path> b/<path>$" line
  53         foreach (explode("\n", $text) as $line) {
  54                 if (preg_match('#^diff --git a/(.*) b/(.*)$#', $line, $matches) > 0) {
  55                         $files[$matches[1]] = urlencode($matches[1]);
  56                 }
  57         }
  58
  59         $text = htmlentities_wrapper($text);
  60
  61         $text = preg_replace(
  62                 array(
  63                         '/^(\+.*)$/m',
  64                         '/^(-.*)$/m',
  65                         '/^(@.*)$/m',
  66                         '/^([^d\+-@].*)$/m',
  67                 ),
  68                 array(
  69                         '<span class="add">$1</span>',
  70                         '<span class="del">$1</span>',
  71                         '<span class="pos">$1</span>',
  72                         '<span class="etc">$1</span>',
  73                 ),
  74                 $text);
  75         $text = preg_replace_callback('#^diff --git a/(.*) b/(.*)$#m',
  76                 create_function(
  77                         '$m',
  78                         'return "<span class=\"diffline\"><a name=\"". urlencode($m[1]) ."\">diff --git a/$m[1] b/$m[2]</a></span>";'
  79                 ),
  80                 $text);
  81
  82         return array($files, $text);
  83 }
  84
  85 /**
  86  * Get project information from config and git, name/description and HEAD
  87  * commit info are returned in an array.
  88  */
  89 function get_project_info($name)
  90 {
  91         global $conf;
  92
  93         $info = $conf['projects'][$name];
  94         $info['name'] = $name;
  95
  96         // If description is not set, read it from the repository's description
  97         if (!isset($info['description'])) {
  98                 $info['description'] = @file_get_contents($info['repo'] .'/description');
  99         }
 100
 101         $headinfo = git_get_commit_info($name, 'HEAD');
 102         $info['head_stamp'] = $headinfo['author_utcstamp'];
 103         $info['head_datetime'] = strftime($conf['datetime'], $headinfo['author_utcstamp']);
 104         $info['head_hash'] = $headinfo['h'];
 105         $info['head_tree'] = $headinfo['tree'];
 106         $info['message'] = $headinfo['message'];
 107
 108         return $info;
 109 }
 110
 111 function git_describe($project, $commit)
 112 {
 113         $output = run_git($project, "describe --always ". escapeshellarg($commit));
 114         return $output[0];
 115 }
 116
 117 /**
 118  * Get diff between given revisions as text.
 119  */
 120 function git_diff($project, $from, $to)
 121 {
 122         return join("\n", run_git($project, "diff \"$from..$to\""));
 123 }
 124
 125 function git_diffstat($project, $commit, $commit_base = null)
 126 {
 127         if (is_null($commit_base)) {
 128                 $commit_base = "$commit^";
 129         }
 130         return join("\n", run_git($project, "diff --stat $commit_base..$commit"));
 131 }
 132
 133 /**
 134  * Get array of changed paths for a commit.
 135  */
 136 function git_get_changed_paths($project, $hash = 'HEAD')
 137 {
 138         $result = array();
 139         $affected_files = run_git($project, "show --pretty=\"format:\" --name-only $hash");
 140         foreach ($affected_files as $file ) {
 141                 // The format above contains a blank line; Skip it.
 142                 if ($file == '') {
 143                         continue;
 144                 }
 145
 146                 $output = run_git($project, "ls-tree $hash $file");
 147                 foreach ($output as $line) {
 148                         $parts = preg_split('/\s+/', $line, 4);
 149                         $result[] = array('name' => $parts[3], 'hash' => $parts[2]);
 150                 }
 151         }
 152         return $result;
 153 }
 154
 155 /**
 156  * Get details of a commit: tree, parents, author/committer (name, mail, date), message
 157  */
 158 function git_get_commit_info($project, $hash = 'HEAD', $path = null)
 159 {
 160         global $conf;
 161
 162         $info = array();
 163         $info['h_name'] = $hash;
 164         $info['message_full'] = '';
 165         $info['parents'] = array();
 166
 167         $extra = '';
 168         if (isset($path)) {
 169                 $extra = '-- '. escapeshellarg($path);
 170         }
 171
 172         $output = run_git($project, "rev-list --header --max-count=1 $hash $extra");
 173         // tree <h>
 174         // parent <h>
 175         // author <name> "<"<mail>">" <stamp> <timezone>
 176         // committer
 177         // <empty>
 178         //     <message>
 179         $pattern = '/^(author|committer) ([^<]+) <([^>]*)> ([0-9]+) (.*)$/';
 180         foreach ($output as $line) {
 181                 if (substr($line, 0, 4) === 'tree') {
 182                         $info['tree'] = substr($line, 5);
 183                 }
 184                 // may be repeated multiple times for merge/octopus
 185                 elseif (substr($line, 0, 6) === 'parent') {
 186                         $info['parents'][] = substr($line, 7);
 187                 }
 188                 elseif (preg_match($pattern, $line, $matches) > 0) {
 189                         $info[$matches[1] .'_name'] = $matches[2];
 190                         $info[$matches[1] .'_mail'] = $matches[3];
 191                         $info[$matches[1] .'_stamp'] = $matches[4] + ((intval($matches[5]) / 100.0) * 3600);
 192                         $info[$matches[1] .'_timezone'] = $matches[5];
 193                         $info[$matches[1] .'_utcstamp'] = $matches[4];
 194
 195                         if (isset($conf['mail_filter'])) {
 196                                 $info[$matches[1] .'_mail'] = $conf['mail_filter']($info[$matches[1] .'_mail']);
 197                         }
 198                 }
 199                 // Lines starting with four spaces and empty lines after first such line are part of commit message
 200                 elseif (substr($line, 0, 4) === '    ' || (strlen($line) == 0 && isset($info['message']))) {
 201                         $info['message_full'] .= substr($line, 4) ."\n";
 202                         if (!isset($info['message'])) {
 203                                 $info['message'] = substr($line, 4, $conf['commit_message_maxlen']);
 204                                 $info['message_firstline'] = substr($line, 4);
 205                         }
 206                 }
 207                 elseif (preg_match('/^[0-9a-f]{40}$/', $line) > 0) {
 208                         $info['h'] = $line;
 209                 }
 210         }
 211
 212         // This is a workaround for the unlikely situation where a commit does
 213         // not have a message. Such a commit can be created with the following
 214         // command:
 215         // git commit --allow-empty -m '' --cleanup=verbatim
 216         if (!array_key_exists('message', $info)) {
 217                 $info['message'] = '(no message)';
 218                 $info['message_firstline'] = '(no message)';
 219         }
 220
 221         $info['author_datetime'] = strftime($conf['datetime_full'], $info['author_utcstamp']);
 222         $info['author_datetime_local'] = strftime($conf['datetime_full'], $info['author_stamp']) .' '. $info['author_timezone'];
 223         $info['committer_datetime'] = strftime($conf['datetime_full'], $info['committer_utcstamp']);
 224         $info['committer_datetime_local'] = strftime($conf['datetime_full'], $info['committer_stamp']) .' '. $info['committer_timezone'];
 225
 226         return $info;
 227 }
 228
 229 /**
 230  * Get list of heads (branches) for a project.
 231  */
 232 function git_get_heads($project)
 233 {
 234         $heads = array();
 235
 236         $output = run_git($project, 'show-ref --heads');
 237         foreach ($output as $line) {
 238                 $fullname = substr($line, 41);
 239                 $tmp = explode('/', $fullname);
 240                 $name = array_pop($tmp);
 241                 $pre = array_pop($tmp);
 242                 if ($pre != 'heads')
 243                 {
 244                         $name = $pre . '/' . $name;
 245                 }
 246                 $heads[] = array('h' => substr($line, 0, 40), 'fullname' => "$fullname", 'name' => "$name");
 247         }
 248
 249         return $heads;
 250 }
 251
 252 /**
 253  * Get array containing path information for parts, starting from root_hash.
 254  *
 255  * @param root_hash commit/tree hash for the root tree
 256  * @param path path
 257  */
 258 function git_get_path_info($project, $root_hash, $path)
 259 {
 260         if (strlen($path) > 0) {
 261                 $parts = explode('/', $path);
 262         } else {
 263                 $parts = array();
 264         }
 265
 266         $pathinfo = array();
 267
 268         $tid = $root_hash;
 269         $pathinfo = array();
 270         foreach ($parts as $p) {
 271                 $entry = git_ls_tree_part($project, $tid, $p);
 272                 if (is_null($entry)) {
 273                         die('Invalid path info.');
 274                 }
 275                 $pathinfo[] = $entry;
 276                 $tid = $entry['hash'];
 277         }
 278
 279         return $pathinfo;
 280 }
 281
 282 /**
 283  * Get revision list starting from given commit.
 284  * @param skip how many hashes to skip from the beginning
 285  * @param max_count number of commit hashes to return, or all if not given
 286  * @param start revision to start from, or HEAD if not given
 287  */
 288 function git_get_rev_list($project, $skip = 0, $max_count = null, $start = 'HEAD')
 289 {
 290         $cmd = "rev-list ";
 291         if ($skip != 0) {
 292                 $cmd .= "--skip=$skip ";
 293         }
 294         if (!is_null($max_count)) {
 295                 $cmd .= "--max-count=$max_count ";
 296         }
 297         $cmd .= $start;
 298
 299         return run_git($project, $cmd);
 300 }
 301
 302 /**
 303  * Get list of tags for a project.
 304  */
 305 function git_get_tags($project)
 306 {
 307         $tags = array();
 308
 309         $output = run_git($project, 'show-ref --tags');
 310         foreach ($output as $line) {
 311                 $fullname = substr($line, 41);
 312                 $tmp = explode('/', $fullname);
 313                 $name = array_pop($tmp);
 314                 $tags[] = array('h' => substr($line, 0, 40), 'fullname' => $fullname, 'name' => $name);
 315         }
 316         return $tags;
 317 }
 318
 319 /**
 320  * Get information about objects in a tree.
 321  * @param tree tree or commit hash
 322  * @return list of arrays containing name, mode, type, hash
 323  */
 324 function git_ls_tree($project, $tree)
 325 {
 326         $entries = array();
 327         $output = run_git($project, "ls-tree $tree");
 328         // 100644 blob 493b7fc4296d64af45dac64bceac2d9a96c958c1    .gitignore
 329         // 040000 tree 715c78b1011dc58106da2a1af2fe0aa4c829542f    doc
 330         foreach ($output as $line) {
 331                 $parts = preg_split('/\s+/', $line, 4);
 332                 $entries[] = array('name' => $parts[3], 'mode' => $parts[0], 'type' => $parts[1], 'hash' => $parts[2]);
 333         }
 334
 335         return $entries;
 336 }
 337
 338 /**
 339  * Get information about the given object in a tree, or null if not in the tree.
 340  */
 341 function git_ls_tree_part($project, $tree, $name)
 342 {
 343         $entries = git_ls_tree($project, $tree);
 344         foreach ($entries as $entry) {
 345                 if ($entry['name'] === $name) {
 346                         return $entry;
 347                 }
 348         }
 349         return null;
 350 }
 351
 352 /**
 353  * Get the ref list as dict: hash -> list of names.
 354  * @param tags whether to show tags
 355  * @param heads whether to show heads
 356  * @param remotes whether to show remote heads, currently implies tags and heads too.
 357  */
 358 function git_ref_list($project, $tags = true, $heads = true, $remotes = true)
 359 {
 360         $cmd = "show-ref --dereference";
 361         if (!$remotes) {
 362                 if ($tags) { $cmd .= " --tags"; }
 363                 if ($heads) { $cmd .= " --heads"; }
 364         }
 365
 366         $result = array();
 367         $output = run_git($project, $cmd);
 368         foreach ($output as $line) {
 369                 // <hash> <ref>
 370                 $parts = explode(' ', $line, 2);
 371                 $name = str_replace(array('refs/', '^{}'), array('', ''), $parts[1]);
 372                 $result[$parts[0]][] = $name;
 373         }
 374         return $result;
 375 }
 376
 377 /**
 378  * Find commits based on search type and string.
 379  */
 380 function git_search_commits($project, $branch, $type, $string)
 381 {
 382         // git log -sFOO
 383         if ($type == 'change') {
 384                 $cmd = 'log -S'. escapeshellarg($string);
 385         }
 386         elseif ($type == 'commit') {
 387                 $cmd = 'log -i --grep='. escapeshellarg($string);
 388         }
 389         elseif ($type == 'author') {
 390                 $cmd = 'log -i --author='. escapeshellarg($string);
 391         }
 392         elseif ($type == 'committer') {
 393                 $cmd = 'log -i --committer='. escapeshellarg($string);
 394         }
 395         else {
 396                 die('Unsupported type');
 397         }
 398         $cmd .= ' '. $branch;
 399         $lines = run_git($project, $cmd);
 400
 401         $result = array();
 402         foreach ($lines as $line) {
 403                 if (preg_match('/^commit (.*?)$/', $line, $matches)) {
 404                         $result[] = $matches[1];
 405                 }
 406         }
 407         return $result;
 408 }
 409
 410 /**
 411  * Get shortlog entries for the given project.
 412  */
 413 function handle_shortlog($project, $hash = 'HEAD', $page = 0)
 414 {
 415         global $conf;
 416
 417         $refs_by_hash = git_ref_list($project, true, true, $conf['shortlog_remote_labels']);
 418
 419         $result = array();
 420         $revs = git_get_rev_list($project, $page * $conf['summary_shortlog'], $conf['summary_shortlog'], $hash);
 421         foreach ($revs as $rev) {
 422                 $info = git_get_commit_info($project, $rev);
 423                 $refs = array();
 424                 if (in_array($rev, array_keys($refs_by_hash))) {
 425                         $refs = $refs_by_hash[$rev];
 426                 }
 427                 $result[] = array(
 428                         'author' => $info['author_name'],
 429                         'date' => strftime($conf['datetime'], $info['author_utcstamp']),
 430                         'message' => $info['message'],
 431                         'commit_id' => $rev,
 432                         'tree' => $info['tree'],
 433                         'refs' => $refs,
 434                 );
 435         }
 436         #print_r($result);
 437         #die();
 438
 439         return $result;
 440 }
 441
 442 /**
 443  * Fetch tags data, newest first.
 444  *
 445  * @param limit maximum number of tags to return
 446  */
 447 function handle_tags($project, $limit = 0)
 448 {
 449         global $conf;
 450
 451         $tags = git_get_tags($project);
 452         $result = array();
 453         foreach ($tags as $tag) {
 454                 $info = git_get_commit_info($project, $tag['h']);
 455                 $result[] = array(
 456                         'stamp' => $info['author_utcstamp'],
 457                         'date' => strftime($conf['datetime'], $info['author_utcstamp']),
 458                         'h' => $tag['h'],
 459                         'fullname' => $tag['fullname'],
 460                         'name' => $tag['name'],
 461                 );
 462         }
 463
 464         // sort tags newest first
 465         // aka. two more reasons to hate PHP (figuring those out is your homework:)
 466         usort($result, create_function(
 467                 '$x, $y',
 468                 '$a = $x["stamp"]; $b = $y["stamp"]; return ($a == $b ? 0 : ($a > $b ? -1 : 1));'
 469         ));
 470
 471         // TODO optimize this some way, currently all tags are fetched when only a
 472         // few are shown. The problem is that without fetching the commit info
 473         // above, we can't sort using dates, only by tag name...
 474         if ($limit > 0) {
 475                 $result = array_splice($result, 0, $limit);
 476         }
 477
 478         return $result;
 479 }
 480
 481 function htmlentities_wrapper($text)
 482 {
 483         return htmlentities(@iconv('UTF-8', 'UTF-8//IGNORE', $text), ENT_NOQUOTES, 'UTF-8');
 484 }
 485
 486 function xmlentities_wrapper($text)
 487 {
 488         return str_replace(array('&', '<'), array('&#x26;', '&#x3C;'), @iconv('UTF-8', 'UTF-8//IGNORE', $text));
 489 }
 490
 491 /**
 492  * Return a URL that contains the given parameters.
 493  */
 494 function makelink($dict)
 495 {
 496         $params = array();
 497         foreach ($dict as $k => $v) {
 498                 $params[] = rawurlencode($k) .'='. str_replace('%2F', '/', rawurlencode($v));
 499         }
 500         if (count($params) > 0) {
 501                 return '?'. htmlentities_wrapper(join('&', $params));
 502         }
 503         return '';
 504 }
 505
 506 /**
 507  * Obfuscate the e-mail address.
 508  */
 509 function obfuscate_mail($mail)
 510 {
 511         return str_replace(array('@', '.'), array(' at ', ' dot '), $mail);
 512 }
 513
 514 /**
 515  * Used to format RSS item title and description.
 516  *
 517  * @param info commit info from git_get_commit_info()
 518  */
 519 function rss_item_format($format, $info)
 520 {
 521         return preg_replace(array(
 522                 '/{AUTHOR}/',
 523                 '/{AUTHOR_MAIL}/',
 524                 '/{SHORTLOG}/',
 525                 '/{LOG}/',
 526                 '/{COMMITTER}/',
 527                 '/{COMMITTER_MAIL}/',
 528                 '/{DIFFSTAT}/',
 529         ), array(
 530                 htmlentities_wrapper($info['author_name']),
 531                 htmlentities_wrapper($info['author_mail']),
 532                 htmlentities_wrapper($info['message_firstline']),
 533                 htmlentities_wrapper($info['message_full']),
 534                 htmlentities_wrapper($info['committer_name']),
 535                 htmlentities_wrapper($info['committer_mail']),
 536                 htmlentities_wrapper(isset($info['diffstat']) ? $info['diffstat'] : ''),
 537         ), $format);
 538 }
 539
 540 function rss_pubdate($secs)
 541 {
 542         return gmdate('D, d M Y H:i:s O', $secs);
 543 }
 544
 545 /**
 546  * Executes a git command in the project repo.
 547  * @return array of output lines
 548  */
 549 function run_git($project, $command)
 550 {
 551         global $conf;
 552
 553         $output = array();
 554         $cmd = $conf['git'] ." --git-dir=". escapeshellarg($conf['projects'][$project]['repo']) ." $command";
 555         $ret = 0;
 556         exec($cmd, $output, $ret);
 557         if ($conf['debug_command_trace']) {
 558                 static $count = 0;
 559                 $count++;
 560                 trigger_error("[$count]\$ $cmd [exit $ret]");
 561         }
 562         //if ($ret != 0) { die('FATAL: exec() for git failed, is the path properly configured?'); }
 563         return $output;
 564 }
 565
 566 /**
 567  * Executes a git command in the project repo, sending output directly to the
 568  * client.
 569  */
 570 function run_git_passthru($project, $command)
 571 {
 572         global $conf;
 573
 574         $cmd = $conf['git'] ." --git-dir=". escapeshellarg($conf['projects'][$project]['repo']) ." $command";
 575         $result = 0;
 576         passthru($cmd, $result);
 577         return $result;
 578 }
 579
 580 function tpl_extlink($link)
 581 {
 582         echo "<a href=\"$link\" class=\"external\">&#8599;</a>";
 583 }
 584
 585 /**
 586  * Makes sure the given project is valid. If it's not, this function will
 587  * die().
 588  * @return the project
 589  */
 590 function validate_project($project)
 591 {
 592         global $conf;
 593
 594         if (!in_array($project, array_keys($conf['projects']))) {
 595                 die('Invalid project');
 596         }
 597         return $project;
 598 }
 599
 600 /**
 601  * Makes sure the given hash is valid. If it's not, this function will die().
 602  * @return the hash
 603  */
 604 function validate_hash($hash)
 605 {
 606         if (!preg_match('/^[0-9a-z]{40}$/', $hash) && !preg_match('!^refs/(heads|tags)/[-_.0-9a-zA-Z/]+$!', $hash) && $hash !== 'HEAD') {
 607                 die('Invalid hash');
 608
 609         }
 610         return $hash;
 611 }
 612
 613 /**
 614  * Custom error handler for ViewGit. The errors are pushed to $page['notices']
 615  * and displayed by templates/header.php.
 616  */
 617 function vg_error_handler($errno, $errstr, $errfile, $errline)
 618 {
 619         global $page;
 620
 621         $mask = ini_get('error_reporting');
 622
 623         $class = 'error';
 624
 625         // If mask for this error is not enabled, return silently
 626         if (!($errno & $mask)) {
 627                 return true;
 628         }
 629
 630         // Remove any preceding path until viewgit's directory
 631         $file = $errfile;
 632         $file = strstr($file, 'viewgit/');
 633
 634         $message = "$file:$errline $errstr [$errno]";
 635
 636         switch ($errno) {
 637                 case E_ERROR:
 638                         $class = 'error';
 639                         break;
 640                 case E_WARNING:
 641                         $class = 'warning';
 642                         break;
 643                 case E_NOTICE:
 644                 case E_STRICT:
 645                 default:
 646                         $class = 'info';
 647                         break;
 648         }
 649
 650         $page['notices'][] = array(
 651                 'message' => $message,
 652                 'class' => $class,
 653         );
 654
 655         return true;
 656 }
 657