| 1 | <?php |
| 2 | /************************************************************* |
| 3 | # 076 License |
| 4 | |
| 5 | Copyright (c) テクニカル諏訪子 |
| 6 | |
| 7 | Permission is hereby granted to any person obtaining a copy of the software |
| 8 | Little Beast (the "Software") to use, modify, merge, copy, publish, distribute, |
| 9 | sublicense, and/or sell copies of the Software, subject to the following conditions: |
| 10 | |
| 11 | 1. **Origin Attribution**: |
| 12 | - You must not misrepresent the origin of the Software; you must not claim |
| 13 | you created the original Software. |
| 14 | - If the Software is used in a product, you must either: |
| 15 | a. Provide clear attribution in the product's documentation, user interface, |
| 16 | or other visible areas, **OR** |
| 17 | b. Pay the original developers a fee they specify in writing. |
| 18 | 2. **Usage Restriction**: |
| 19 | - The Software, or any derivative works, dependencies, or libraries |
| 20 | incorporating it, must not be used for censorship or to suppress freedom of |
| 21 | speech, expression, or creativity. Prohibited uses include, but are not |
| 22 | limited to: |
| 23 | - Censorship of so-called "hate speech", visuals, non-mainstream opinions, |
| 24 | ideas, or objective reality. |
| 25 | - Tools or systems designed to restrict access to information or |
| 26 | artistic works. |
| 27 | 3. **Notice Preservation**: |
| 28 | - This license and the above copyright notice must remain intact in all copies |
| 29 | of the source code. |
| 30 | |
| 31 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
| 32 | INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A |
| 33 | PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
| 34 | HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF |
| 35 | CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE |
| 36 | OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 37 | */ |
| 38 | namespace Std\Lib\Git; |
| 39 | |
| 40 | /** |
| 41 | * リポジトリの整理（git gc の基本）：到達出来るオブジェクトを1つのパックにまとめ、古い不要なファイルを消す |
| 42 | * |
| 43 | * プッシュで増えたルーズオブジェクトと小さいパックをまとめる。cronで定期的に実行すると良い。 |
| 44 | * 新しい差分は作らない（既存のパックの差分は再利用する）。 |
| 45 | */ |
| 46 | final class Maintenance { |
| 47 | /** |
| 48 | * @param int $pruneAge 到達出来ないオブジェクト・パックを消すまでの秒数（既定は2週間、受信中の物を消さない様に） |
| 49 | * @return array objects（パックにしたオブジェクトの数）、removedLoose、removedPacks |
| 50 | */ |
| 51 | public static function gc(Repository $repo, int $pruneAge = 1209600): array { |
| 52 | $lock = $repo->path.'/gc.pid'; |
| 53 | $fh = @fopen($lock, 'c'); |
| 54 | if ($fh === false || !flock($fh, LOCK_EX | LOCK_NB)) throw new GitException('別のgcが実行中です'); |
| 55 | try { |
| 56 | $tips = array_values($repo->refs->all()); |
| 57 | $head = $repo->refs->resolve('HEAD'); |
| 58 | if ($head !== null) $tips[] = $head; |
| 59 | $tips = array_values(array_unique($tips)); |
| 60 | $objects = empty($tips) ? [] : (new Walk($repo))->objects($tips, []); |
| 61 | $old = $repo->objects->packs(true); |
| 62 | $newPack = null; |
| 63 | if (!empty($objects)) { |
| 64 | $tmp = $repo->objects->dir().'/pack/tmp_gc_'.bin2hex(random_bytes(6)); |
| 65 | $out = fopen($tmp, 'w+b'); |
| 66 | try { |
| 67 | (new PackWriter($repo))->write($objects, fn(string $b) => fwrite($out, $b)); |
| 68 | rewind($out); |
| 69 | $res = (new PackIndexer($repo))->receive($out, 0); |
| 70 | $newPack = $res['pack']; |
| 71 | } finally { |
| 72 | fclose($out); |
| 73 | @unlink($tmp); |
| 74 | } |
| 75 | } |
| 76 | $cutoff = time() - $pruneAge; |
| 77 | $removedPacks = 0; |
| 78 | foreach ($old as $path => $pack) { |
| 79 | if ($path === $newPack || !str_starts_with($path, $repo->objects->dir().'/')) continue; |
| 80 | // 全部が新しいパックに有るか、古い（到達出来ない物だけ）なら消す |
| 81 | $all = true; |
| 82 | foreach ($pack->ids() as $id) if (!isset($objects[$id])) { |
| 83 | $all = false; |
| 84 | break; |
| 85 | } |
| 86 | if (!$all && filemtime($path) >= $cutoff) continue; |
| 87 | if (is_file(substr($path, 0, -5).'.keep')) continue; |
| 88 | unset($pack); |
| 89 | foreach (['.idx', '.rev', '.pack'] as $ext) @unlink(substr($path, 0, -5).$ext); |
| 90 | $removedPacks++; |
| 91 | } |
| 92 | $removedLoose = 0; |
| 93 | foreach (glob($repo->objects->dir().'/[0-9a-f][0-9a-f]/*') ?: [] as $f) { |
| 94 | $id = basename(dirname($f)).basename($f); |
| 95 | if (!$repo->isId($id)) continue; |
| 96 | if (isset($objects[$id]) || filemtime($f) < $cutoff) { |
| 97 | if (@unlink($f)) $removedLoose++; |
| 98 | } |
| 99 | } |
| 100 | foreach (glob($repo->objects->dir().'/[0-9a-f][0-9a-f]', GLOB_ONLYDIR) ?: [] as $d) @rmdir($d); |
| 101 | // 残った一時ファイル |
| 102 | foreach (glob($repo->objects->dir().'/pack/tmp_*') ?: [] as $f) if (filemtime($f) < $cutoff) @unlink($f); |
| 103 | return ['objects' => count($objects), 'removedLoose' => $removedLoose, 'removedPacks' => $removedPacks]; |
| 104 | } finally { |
| 105 | flock($fh, LOCK_UN); |
| 106 | fclose($fh); |
| 107 | @unlink($lock); |
| 108 | } |
| 109 | } |
| 110 | } |