インデックス形式

use Pitmaster\Index\Index;

$index = Index::open('/path/to/.git/index');   // pass 32 as the second argument for SHA-256

// Or through the repository
$index = $repo->index();

// Entry count (all stages)
echo $index->count();

// Iterate stage 0 entries, keyed by path
foreach ($index->entries() as $path => $entry) {
    echo "{$entry->path} {$entry->hash->hex}\n";
}

// Look up a specific entry
$entry = $index->entry('src/File.php');

use Pitmaster\Index\IndexEntry;

$entry->path;          // File path relative to repo root
$entry->hash;          // ObjectId of the blob
$entry->mode;          // File mode as an int (0100644, 0100755, 0120000, 0160000)
$entry->fileSize;      // File size in bytes
$entry->ctimeSec;      // Metadata change time (seconds)
$entry->ctimeNsec;     // Metadata change time nanoseconds
$entry->mtimeSec;      // Modification time (seconds)
$entry->mtimeNsec;     // Modification time nanoseconds
$entry->dev;           // Device number
$entry->ino;           // Inode number
$entry->uid;           // User ID
$entry->gid;           // Group ID
$entry->flags;         // Raw flags field
$entry->extendedFlags; // v3 extended flags (skip-worktree, intent-to-add)
$entry->stage();       // Conflict stage (0 = normal, 1 = base, 2 = ours, 3 = theirs)
$entry->assumeValid(); // Assume-valid bit
$entry->skipWorktree(); // Skip-worktree bit

// From file stat
$entry = IndexEntry::fromStat('src/File.php', $blobId, '/full/path/to/src/File.php');

// Minimal (no stat info)
$entry = IndexEntry::create('src/File.php', $blobId);

// With explicit mode
$entry = IndexEntry::create('deploy.sh', $blobId, 0100755);

// Add or replace an entry
$index->addEntry($entry);

// Remove an entry
$index->removeEntry('src/OldFile.php');

// Replace all stages of a conflicted path with one resolved entry
$index->resolveConflict('src/File.php', $entry);

use Pitmaster\Index\IndexWriter;

IndexWriter::write($index, '/path/to/.git/index');

$repo->add('src/File.php');    // Reads file, creates blob, updates index, writes
$repo->remove('--cached', 'old-file.txt'); // Removes from index only, writes

Signature:   DIRC (4 bytes, ASCII)
Version:     4 bytes, big-endian (2, 3, or 4)
Entry count: 4 bytes, big-endian

ctime seconds:     4 bytes, big-endian
ctime nanoseconds: 4 bytes, big-endian
mtime seconds:     4 bytes, big-endian
mtime nanoseconds: 4 bytes, big-endian
dev:               4 bytes, big-endian
ino:               4 bytes, big-endian
mode:              4 bytes, big-endian
uid:               4 bytes, big-endian
gid:               4 bytes, big-endian
file size:         4 bytes, big-endian
object hash:       20 bytes SHA-1 or 32 bytes SHA-256 (raw binary)
flags:             2 bytes, big-endian
path:              variable length, NUL-terminated
padding:           1-8 NUL bytes to align to 8-byte boundary

// During a conflict, entries have non-zero stages
foreach ($index->allEntries() as $entry) {
    if ($entry->stage() > 0) {
        echo "Conflict: {$entry->path} (stage {$entry->stage()})\n";
    }
}

$index->hasUnmerged();            // true while conflicts remain
$index->unmergedPaths();          // conflicted paths
$index->stageEntries('a.txt');    // [1 => base, 2 => ours, 3 => theirs]

if ($entry->assumeValid()) {
    // Entry has assume-valid set (flags & 0x8000)
}