Subversion Repositories php_utils

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Ignore whitespace Rev 81 → Rev 82

/trunk/composer.json
Cannot display: file marked as a binary type.
svn:mime-type = application/json
/trunk/git_utils.inc.php
18,84 → 18,111
* limitations under the License.
*/
 
function git_get_latest_commit_message($git_dir) {
// First try an official git client
$cmd = "git --git-dir=".escapeshellarg("$git_dir")." log -1 2>&1";
$ec = -1;
$out = array();
@exec($cmd, $out, $ec);
$out = implode("\n",$out);
if (($ec == 0) && ($out != '')) return $out;
function git_get_latest_commit_id(string $git_dir): string {
// Note: The method "getTip()" of GLIP only implements "refs/heads/master" and "packed-refs" (but for packed-refs without "refs/remotes/origin/...")
 
// If that failed, try to decode the binary files outselves
$cont = @file_get_contents($git_dir.'/HEAD');
if (preg_match('@ref: (.+)[\r\n]@', "$cont\n", $m) && file_exists($git_dir.'/'.$m[1])) {
$cont = @file_get_contents($git_dir . '/HEAD');
if (preg_match('@ref: (.+)[\r\n]@', "$cont\n", $m) && file_exists($git_dir . '/' . $m[1])) {
// Example content of a .git folder file:
// 091a5fa6b157be035e88f5d24aa329ba44d20d63
// Not available
$commit_object = trim(file_get_contents($git_dir.'/'.$m[1]));
} else if (file_exists($git_dir.'/refs/heads/master')) {
return trim(file_get_contents($git_dir . '/' . $m[1]));
}
 
if (file_exists($git_dir . '/refs/heads/master')) {
// Missing at Plesk Git initial checkout, but available on update.
$commit_object = trim(file_get_contents($git_dir.'/refs/heads/master'));
} else if (file_exists($git_dir.'/FETCH_HEAD')) {
return trim(file_get_contents($git_dir . '/refs/heads/master'));
}
 
if (file_exists($git_dir . '/packed-refs')) {
// Example contents of the file:
// # pack-refs with: peeled fully-peeled sorted
// 5605bd539677494558470234266cb5885343e72b refs/remotes/origin/master
// a3d910dd0cdca30827ae25b0f89045d8403b8843 refs/remotes/origin/patch-1
$subpaths = ['refs/heads/master', 'refs/remotes/origin/master'];
foreach ($subpaths as $subpath) {
$head = null;
$f = fopen($git_dir . '/packed-refs', 'rb');
flock($f, LOCK_SH);
while ($head === null && ($line = fgets($f)) !== false) {
if ($line[0] == '#')
continue;
$parts = explode(' ', trim($line));
if (count($parts) == 2 && $parts[1] == $subpath)
$head = $parts[0];
}
fclose($f);
if ($head !== null)
return $head;
}
}
 
if (file_exists($git_dir . '/FETCH_HEAD')) {
// Example content of a Plesk Git folder (fresh):
// 091a5fa6b157be035e88f5d24aa329ba44d20d63 not-for-merge branch 'master' of https://github.com/danielmarschall/oidplus
// 091a5fa6b157be035e88f5d24aa329ba44d20d63 not-for-merge remote-tracking branch 'origin/trunk' of https://github.com/danielmarschall/oidplus
$cont = file_get_contents($git_dir.'/FETCH_HEAD');
$commit_object = substr(trim($cont),0,40);
} else {
throw new Exception("Cannot detect last commit object");
$cont = file_get_contents($git_dir . '/FETCH_HEAD');
return substr(trim($cont), 0, 40);
}
 
throw new Exception("Cannot detect latest Commit ID");
}
 
function git_get_latest_commit_message(string $git_dir): string {
// First try an official git client
$cmd = "git --git-dir=" . escapeshellarg("$git_dir") . " log -1 2>&1";
$ec = -1;
$out = array();
@exec($cmd, $out, $ec);
$out = implode("\n", $out);
if (($ec == 0) && ($out != '')) return $out;
 
// If that failed, try to decode the binary files ourselves
$commit_object = git_get_latest_commit_id($git_dir);
$objects_dir = $git_dir . '/objects';
 
 
// Sometimes, objects are uncompressed, sometimes compressed in a pack file
// Plesk initial checkout is compressed, but pulls via web interface
// save uncompressed files
 
$uncompressed_file = $objects_dir . '/' . substr($commit_object,0,2) . '/' . substr($commit_object,2);
if (file_exists($uncompressed_file)) {
// Read compressed data
$compressed = file_get_contents($uncompressed_file);
if (class_exists('ViaThinkSoft\Glip\Git')) {
// https://github.com/danielmarschall/glip
// composer require danielmarschall/glip
$git = new ViaThinkSoft\Glip\Git($git_dir);
$obj = $git->getObject(hex2bin($commit_object));
return $obj->detail;
} else {
// Own implementation (the compressed read cannot handle delta objects yet)
 
// Uncompress
$uncompressed = @gzuncompress($compressed);
if ($uncompressed === false) throw new Exception("Decompression failed");
$uncompressed_file = $objects_dir . '/' . substr($commit_object, 0, 2) . '/' . substr($commit_object, 2);
if (file_exists($uncompressed_file)) {
// Read compressed data
$compressed = file_get_contents($uncompressed_file);
 
// The format is "commit <nnn>\0<Message>" where <nnn> is only a 3 digit number?!
$ary = explode(chr(0), $uncompressed);
$uncompressed = array_pop($ary);
// Uncompress
$uncompressed = @gzuncompress($compressed);
if ($uncompressed === false) throw new Exception("Decompression failed");
 
return $uncompressed;
} else {
$pack_files = @glob($objects_dir.'/pack/pack-*.pack');
$last_exception = 'No pack files found';
if ($pack_files) foreach ($pack_files as $basename) {
$basename = substr(basename($basename),0,strlen(basename($basename))-5);
try {
if (class_exists('ViaThinkSoft\Glip\Git')) {
// https://github.com/danielmarschall/glip
// composer require danielmarschall/glip
$git = new ViaThinkSoft\Glip\Git($git_dir);
$obj = $git->getObject(hex2bin($commit_object));
return $obj->detail;
} else {
// Own implementation (cannot read delta objects yet)
// The format is "<type> <size>\0<Message>"
list($hdr, $object_data) = explode("\0", $uncompressed, 2);
// sscanf($hdr, "%s %d", $type, $object_size);
return $object_data;
} else {
$pack_files = @glob($objects_dir . '/pack/pack-*.pack');
if ($pack_files) {
foreach ($pack_files as $basename) {
$basename = substr(basename($basename), 0, strlen(basename($basename)) - 5);
return git_read_object($commit_object,
$objects_dir.'/pack/'.$basename.'.idx',
$objects_dir.'/pack/'.$basename.'.pack'
$objects_dir . '/pack/' . $basename . '.idx',
$objects_dir . '/pack/' . $basename . '.pack'
);
}
} catch (Exception $e) {
$last_exception = $e;
}
throw new Exception("No pack files found");
}
throw new Exception($last_exception);
}
}
 
function git_read_object($object_wanted, $idx_file, $pack_file, $debug=false) {
function git_read_object(string $object_wanted, string $idx_file, string $pack_file, bool $debug = false): string {
// More info about the IDX and PACK format: https://git-scm.com/docs/pack-format
 
// Do some checks
123,17 → 150,17
// Read fanout table
fseek($fp, $fanout_offset);
$fanout_ary[0] = 0;
$fanout_ary = unpack('N*', fread($fp, 4*256));
$fanout_ary = unpack('N*', fread($fp, 4 * 256));
$num_objects = $fanout_ary[256];
 
// Find out approximate object number (from fanout table)
$fanout_index = hexdec(substr($object_wanted,0,2));
if ($debug) echo "Fanout index = ".($fanout_index-1)."\n";
$fanout_index = hexdec(substr($object_wanted, 0, 2));
if ($debug) echo "Fanout index = " . ($fanout_index - 1) . "\n";
$object_no = $fanout_ary[$fanout_index]; // approximate
if ($debug) echo "Object no approx $object_no\n";
 
// Find the exact object number
fseek($fp, $fanout_offset + 4*256 + 20*$object_no);
fseek($fp, $fanout_offset + 4 * 256 + 20 * $object_no);
$object_no--;
$pack_offset = -1; // avoid that phpstan complains
do {
142,7 → 169,7
$pack_offset = fread($fp, 4);
}
$binary = fread($fp, 20);
if (substr(bin2hex($binary),0,2) != substr(strtolower($object_wanted),0,2)) {
if (substr(bin2hex($binary), 0, 2) != substr(strtolower($object_wanted), 0, 2)) {
throw new Exception("Object $object_wanted not found");
}
} while (bin2hex($binary) != strtolower($object_wanted));
150,19 → 177,19
 
if ($version == 2) {
// Get CRC32
fseek($fp, $fanout_offset + 4*256 + 20*$num_objects + 4*$object_no);
$crc32 = unpack('H8', fread($fp,4))[1];
if ($debug) echo "CRC32 = ".$crc32."\n";
fseek($fp, $fanout_offset + 4 * 256 + 20 * $num_objects + 4 * $object_no);
$crc32 = unpack('H8', fread($fp, 4))[1];
if ($debug) echo "CRC32 = " . $crc32 . "\n";
 
// Get offset (32 bit)
fseek($fp, $fanout_offset + 4*256 + 20*$num_objects + 4*$num_objects + 4*$object_no);
$offset_info = unpack('N', fread($fp,4))[1];
fseek($fp, $fanout_offset + 4 * 256 + 20 * $num_objects + 4 * $num_objects + 4 * $object_no);
$offset_info = unpack('N', fread($fp, 4))[1];
if ($offset_info >= 0x80000000) {
// MSB set, so the offset is 64 bit
if ($debug) echo "64 bit pack offset\n";
$offset_info &= 0x7FFFFFFF;
fseek($fp, $fanout_offset + 4*256 + 20*$num_objects + 4*$num_objects + 4*$num_objects + 8*$offset_info);
$pack_offset = unpack('J', fread($fp,8))[1];
fseek($fp, $fanout_offset + 4 * 256 + 20 * $num_objects + 4 * $num_objects + 4 * $num_objects + 8 * $offset_info);
$pack_offset = unpack('J', fread($fp, 8))[1];
} else {
// MSB is not set, so the offset is 32 bit
if ($debug) echo "32 bit pack offset\n";
171,7 → 198,7
}
}
 
if ($debug) echo "Pack file offset = ".sprintf('0x%x',$pack_offset)."\n";
if ($debug) echo "Pack file offset = " . sprintf('0x%x', $pack_offset) . "\n";
 
// Close index file
fclose($fp);
182,7 → 209,7
 
// Read type and first part of the size
fseek($fp, $pack_offset);
$size_info = unpack('C', fread($fp,1))[1];
$size_info = unpack('C', fread($fp, 1))[1];
 
// Detect type
$type = ($size_info & 0x70) >> 4; /*0b01110000*/
211,10 → 238,11
}
 
// Find out the expected unpacked size
$size = $size_info & 0xF /*0x00001111*/;
$size = $size_info & 0xF /*0x00001111*/
;
$shift_info = 4;
while ($size_info >= 0x80) {
$size_info = unpack('C', fread($fp,1))[1];
$size_info = unpack('C', fread($fp, 1))[1];
$size = (($size_info & 0x7F) << $shift_info) + $size;
$shift_info += 7;
}
229,7 → 257,7
$offset = 0;
$shift_info = 0;
do {
$offset_info = unpack('C', fread($fp,1))[1];
$offset_info = unpack('C', fread($fp, 1))[1];
$offset = (($offset_info & 0x7F) << $shift_info) + $offset;
$shift_info += 7;
} while ($offset_info >= 0x80);
239,7 → 267,7
}
if ($type == 7/*OBJ_REF_DELTA*/) {
// "base object name if OBJ_REF_DELTA"
$delta_info = bin2hex(fread($fp,20));
$delta_info = bin2hex(fread($fp, 20));
if ($debug) echo "Delta base object name: $delta_info\n";
throw new Exception("OBJ_REF_DELTA is currently not implemented"); // TODO! Implement OBJ_REF_DELTA!
}
247,10 → 275,10
// Read and uncompress the compressed data
$compressed = '';
$uncompressed = false;
for ($compressed_size=1; $compressed_size<=32768*$size; $compressed_size++) {
for ($compressed_size = 1; $compressed_size <= 32768 * $size; $compressed_size++) {
// Since we don't know the compressed size, we need to do trial and error
// TODO: this is a super stupid algorithm! Is there a better way???
$compressed .= fread($fp,1);
$compressed .= fread($fp, 1);
$uncompressed = @gzuncompress($compressed);
if (strlen($uncompressed) === $size) {
if ($debug) echo "Detected compressed size = $compressed_size\n";