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| 1 | <?php |
1 | <?php |
| 2 | 2 | ||
| 3 | /* |
3 | /* |
| 4 | * PHP git functions |
4 | * PHP git functions |
| 5 | * Copyright 2021 - 2023 Daniel Marschall, ViaThinkSoft |
5 | * Copyright 2021 - 2023 Daniel Marschall, ViaThinkSoft |
| 6 | * Revision 2023-04-09 |
6 | * Revision 2023-04-09 |
| 7 | * |
7 | * |
| 8 | * Licensed under the Apache License, Version 2.0 (the "License"); |
8 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 9 | * you may not use this file except in compliance with the License. |
9 | * you may not use this file except in compliance with the License. |
| 10 | * You may obtain a copy of the License at |
10 | * You may obtain a copy of the License at |
| 11 | * |
11 | * |
| 12 | * http://www.apache.org/licenses/LICENSE-2.0 |
12 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 13 | * |
13 | * |
| 14 | * Unless required by applicable law or agreed to in writing, software |
14 | * Unless required by applicable law or agreed to in writing, software |
| 15 | * distributed under the License is distributed on an "AS IS" BASIS, |
15 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 16 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
16 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 17 | * See the License for the specific language governing permissions and |
17 | * See the License for the specific language governing permissions and |
| 18 | * limitations under the License. |
18 | * limitations under the License. |
| 19 | */ |
19 | */ |
| 20 | 20 | ||
| 21 | function git_get_latest_commit_message($git_dir) { |
21 | function git_get_latest_commit_message($git_dir) { |
| 22 | // First try an official git client |
22 | // First try an official git client |
| 23 | $cmd = "git --git-dir=".escapeshellarg("$git_dir")." log -1 2>&1"; |
23 | $cmd = "git --git-dir=".escapeshellarg("$git_dir")." log -1 2>&1"; |
| 24 | $ec = -1; |
24 | $ec = -1; |
| 25 | $out = array(); |
25 | $out = array(); |
| 26 | @exec($cmd, $out, $ec); |
26 | @exec($cmd, $out, $ec); |
| 27 | $out = implode("\n",$out); |
27 | $out = implode("\n",$out); |
| 28 | if (($ec == 0) && ($out != '')) return $out; |
28 | if (($ec == 0) && ($out != '')) return $out; |
| 29 | 29 | ||
| 30 | // If that failed, try to decode the binary files outselves |
30 | // If that failed, try to decode the binary files outselves |
| 31 | $cont = @file_get_contents($git_dir.'/HEAD'); |
31 | $cont = @file_get_contents($git_dir.'/HEAD'); |
| 32 | if (preg_match('@ref: (.+)[\r\n]@', "$cont\n", $m) && file_exists($git_dir.'/'.$m[1])) { |
32 | if (preg_match('@ref: (.+)[\r\n]@', "$cont\n", $m) && file_exists($git_dir.'/'.$m[1])) { |
| 33 | // Example content of a .git folder file: |
33 | // Example content of a .git folder file: |
| 34 | // 091a5fa6b157be035e88f5d24aa329ba44d20d63 |
34 | // 091a5fa6b157be035e88f5d24aa329ba44d20d63 |
| 35 | // Not available |
35 | // Not available |
| 36 | $commit_object = trim(file_get_contents($git_dir.'/'.$m[1])); |
36 | $commit_object = trim(file_get_contents($git_dir.'/'.$m[1])); |
| 37 | } else if (file_exists($git_dir.'/refs/heads/master')) { |
37 | } else if (file_exists($git_dir.'/refs/heads/master')) { |
| 38 | // Missing at Plesk Git initial checkout, but available on update. |
38 | // Missing at Plesk Git initial checkout, but available on update. |
| 39 | $commit_object = trim(file_get_contents($git_dir.'/refs/heads/master')); |
39 | $commit_object = trim(file_get_contents($git_dir.'/refs/heads/master')); |
| 40 | } else if (file_exists($git_dir.'/FETCH_HEAD')) { |
40 | } else if (file_exists($git_dir.'/FETCH_HEAD')) { |
| 41 | // Example content of a Plesk Git folder (fresh): |
41 | // Example content of a Plesk Git folder (fresh): |
| 42 | // 091a5fa6b157be035e88f5d24aa329ba44d20d63 not-for-merge branch 'master' of https://github.com/danielmarschall/oidplus |
42 | // 091a5fa6b157be035e88f5d24aa329ba44d20d63 not-for-merge branch 'master' of https://github.com/danielmarschall/oidplus |
| 43 | // 091a5fa6b157be035e88f5d24aa329ba44d20d63 not-for-merge remote-tracking branch 'origin/trunk' of https://github.com/danielmarschall/oidplus |
43 | // 091a5fa6b157be035e88f5d24aa329ba44d20d63 not-for-merge remote-tracking branch 'origin/trunk' of https://github.com/danielmarschall/oidplus |
| 44 | $cont = file_get_contents($git_dir.'/FETCH_HEAD'); |
44 | $cont = file_get_contents($git_dir.'/FETCH_HEAD'); |
| 45 | $commit_object = substr(trim($cont),0,40); |
45 | $commit_object = substr(trim($cont),0,40); |
| 46 | } else { |
46 | } else { |
| 47 | throw new Exception("Cannot detect last commit object"); |
47 | throw new Exception("Cannot detect last commit object"); |
| 48 | } |
48 | } |
| 49 | 49 | ||
| 50 | $objects_dir = $git_dir . '/objects'; |
50 | $objects_dir = $git_dir . '/objects'; |
| 51 | 51 | ||
| 52 | 52 | ||
| 53 | // Sometimes, objects are uncompressed, sometimes compressed in a pack file |
53 | // Sometimes, objects are uncompressed, sometimes compressed in a pack file |
| 54 | // Plesk initial checkout is compressed, but pulls via web interface |
54 | // Plesk initial checkout is compressed, but pulls via web interface |
| 55 | // save uncompressed files |
55 | // save uncompressed files |
| 56 | 56 | ||
| 57 | $uncompressed_file = $objects_dir . '/' . substr($commit_object,0,2) . '/' . substr($commit_object,2); |
57 | $uncompressed_file = $objects_dir . '/' . substr($commit_object,0,2) . '/' . substr($commit_object,2); |
| 58 | if (file_exists($uncompressed_file)) { |
58 | if (file_exists($uncompressed_file)) { |
| 59 | // Read compressed data |
59 | // Read compressed data |
| 60 | $compressed = file_get_contents($uncompressed_file); |
60 | $compressed = file_get_contents($uncompressed_file); |
| 61 | 61 | ||
| 62 | // Uncompress |
62 | // Uncompress |
| 63 | $uncompressed = @gzuncompress($compressed); |
63 | $uncompressed = @gzuncompress($compressed); |
| 64 | if ($uncompressed === false) throw new Exception("Decompression failed"); |
64 | if ($uncompressed === false) throw new Exception("Decompression failed"); |
| 65 | 65 | ||
| 66 | // The format is "commit <nnn>\0<Message>" where <nnn> is only a 3 digit number?! |
66 | // The format is "commit <nnn>\0<Message>" where <nnn> is only a 3 digit number?! |
| 67 | $ary = explode(chr(0), $uncompressed); |
67 | $ary = explode(chr(0), $uncompressed); |
| 68 | $uncompressed = array_pop($ary); |
68 | $uncompressed = array_pop($ary); |
| 69 | 69 | ||
| 70 | return $uncompressed; |
70 | return $uncompressed; |
| 71 | } else { |
71 | } else { |
| 72 | $pack_files = @glob($objects_dir.'/pack/pack-*.pack'); |
72 | $pack_files = @glob($objects_dir.'/pack/pack-*.pack'); |
| 73 | $last_exception = 'No pack files found'; |
73 | $last_exception = 'No pack files found'; |
| 74 | if ($pack_files) foreach ($pack_files as $basename) { |
74 | if ($pack_files) foreach ($pack_files as $basename) { |
| 75 | $basename = substr(basename($basename),0,strlen(basename($basename))-5); |
75 | $basename = substr(basename($basename),0,strlen(basename($basename))-5); |
| 76 | try { |
76 | try { |
| - | 77 | if (class_exists('ViaThinkSoft\Glip\Git')) { |
|
| - | 78 | // https://github.com/danielmarschall/glip |
|
| - | 79 | // composer require danielmarschall/glip |
|
| - | 80 | $git = new Git($git_dir); |
|
| - | 81 | $obj = $git->getObject(hex2bin($commit_object)); |
|
| - | 82 | echo $obj->detail; |
|
| - | 83 | } else { |
|
| - | 84 | // Own implementation (cannot read delta objects yet) |
|
| 77 | return git_read_object($commit_object, |
85 | return git_read_object($commit_object, |
| 78 | $objects_dir.'/pack/'.$basename.'.idx', |
86 | $objects_dir.'/pack/'.$basename.'.idx', |
| 79 | $objects_dir.'/pack/'.$basename.'.pack' |
87 | $objects_dir.'/pack/'.$basename.'.pack' |
| 80 | ); |
88 | ); |
| - | 89 | } |
|
| 81 | } catch (Exception $e) { |
90 | } catch (Exception $e) { |
| 82 | $last_exception = $e; |
91 | $last_exception = $e; |
| 83 | } |
92 | } |
| 84 | } |
93 | } |
| 85 | throw new Exception($last_exception); |
94 | throw new Exception($last_exception); |
| 86 | } |
95 | } |
| 87 | } |
96 | } |
| 88 | 97 | ||
| 89 | function git_read_object($object_wanted, $idx_file, $pack_file, $debug=false) { |
98 | function git_read_object($object_wanted, $idx_file, $pack_file, $debug=false) { |
| 90 | // More info about the IDX and PACK format: https://git-scm.com/docs/pack-format |
99 | // More info about the IDX and PACK format: https://git-scm.com/docs/pack-format |
| 91 | 100 | ||
| 92 | // Do some checks |
101 | // Do some checks |
| 93 | if (!preg_match('/^[0-9a-fA-F]{40}$/', $object_wanted, $m)) throw new Exception("Is not a valid object: $object_wanted"); |
102 | if (!preg_match('/^[0-9a-fA-F]{40}$/', $object_wanted, $m)) throw new Exception("Is not a valid object: $object_wanted"); |
| 94 | if (!file_exists($idx_file)) throw new Exception("Idx file $idx_file not found"); |
103 | if (!file_exists($idx_file)) throw new Exception("Idx file $idx_file not found"); |
| 95 | if (!file_exists($pack_file)) throw new Exception("Pack file $pack_file not found"); |
104 | if (!file_exists($pack_file)) throw new Exception("Pack file $pack_file not found"); |
| 96 | 105 | ||
| 97 | // Open index file |
106 | // Open index file |
| 98 | $fp = fopen($idx_file, 'rb'); |
107 | $fp = fopen($idx_file, 'rb'); |
| 99 | if (!$fp) throw new Exception("Cannot open index file $idx_file"); |
108 | if (!$fp) throw new Exception("Cannot open index file $idx_file"); |
| 100 | 109 | ||
| 101 | // Read version |
110 | // Read version |
| 102 | fseek($fp, 0); |
111 | fseek($fp, 0); |
| 103 | $unpacked = unpack('H8', fread($fp, 4)); // H8 = 8x "Hex string, high nibble first" |
112 | $unpacked = unpack('H8', fread($fp, 4)); // H8 = 8x "Hex string, high nibble first" |
| 104 | if ($unpacked[1] === bin2hex("\377tOc")) { |
113 | if ($unpacked[1] === bin2hex("\377tOc")) { |
| 105 | $version = unpack('N', fread($fp, 4))[1]; // N = "unsigned long (always 32 bit, big endian byte order)" |
114 | $version = unpack('N', fread($fp, 4))[1]; // N = "unsigned long (always 32 bit, big endian byte order)" |
| 106 | $fanout_offset = 8; |
115 | $fanout_offset = 8; |
| 107 | if ($version != 2) throw new Exception("Version $version unknown"); |
116 | if ($version != 2) throw new Exception("Version $version unknown"); |
| 108 | } else { |
117 | } else { |
| 109 | $version = 1; |
118 | $version = 1; |
| 110 | $fanout_offset = 0; |
119 | $fanout_offset = 0; |
| 111 | } |
120 | } |
| 112 | if ($debug) echo "Index file version = $version\n"; |
121 | if ($debug) echo "Index file version = $version\n"; |
| 113 | 122 | ||
| 114 | // Read fanout table |
123 | // Read fanout table |
| 115 | fseek($fp, $fanout_offset); |
124 | fseek($fp, $fanout_offset); |
| 116 | $fanout_ary[0] = 0; |
125 | $fanout_ary[0] = 0; |
| 117 | $fanout_ary = unpack('N*', fread($fp, 4*256)); |
126 | $fanout_ary = unpack('N*', fread($fp, 4*256)); |
| 118 | $num_objects = $fanout_ary[256]; |
127 | $num_objects = $fanout_ary[256]; |
| 119 | 128 | ||
| 120 | // Find out approximate object number (from fanout table) |
129 | // Find out approximate object number (from fanout table) |
| 121 | $fanout_index = hexdec(substr($object_wanted,0,2)); |
130 | $fanout_index = hexdec(substr($object_wanted,0,2)); |
| 122 | if ($debug) echo "Fanout index = ".($fanout_index-1)."\n"; |
131 | if ($debug) echo "Fanout index = ".($fanout_index-1)."\n"; |
| 123 | $object_no = $fanout_ary[$fanout_index]; // approximate |
132 | $object_no = $fanout_ary[$fanout_index]; // approximate |
| 124 | if ($debug) echo "Object no approx $object_no\n"; |
133 | if ($debug) echo "Object no approx $object_no\n"; |
| 125 | 134 | ||
| 126 | // Find the exact object number |
135 | // Find the exact object number |
| 127 | fseek($fp, $fanout_offset + 4*256 + 20*$object_no); |
136 | fseek($fp, $fanout_offset + 4*256 + 20*$object_no); |
| 128 | $object_no--; |
137 | $object_no--; |
| 129 | $pack_offset = -1; // avoid that phpstan complains |
138 | $pack_offset = -1; // avoid that phpstan complains |
| 130 | do { |
139 | do { |
| 131 | $object_no++; |
140 | $object_no++; |
| 132 | if ($version == 1) { |
141 | if ($version == 1) { |
| 133 | $pack_offset = fread($fp, 4); |
142 | $pack_offset = fread($fp, 4); |
| 134 | } |
143 | } |
| 135 | $binary = fread($fp, 20); |
144 | $binary = fread($fp, 20); |
| 136 | if (substr(bin2hex($binary),0,2) != substr(strtolower($object_wanted),0,2)) { |
145 | if (substr(bin2hex($binary),0,2) != substr(strtolower($object_wanted),0,2)) { |
| 137 | throw new Exception("Object $object_wanted not found"); |
146 | throw new Exception("Object $object_wanted not found"); |
| 138 | } |
147 | } |
| 139 | } while (bin2hex($binary) != strtolower($object_wanted)); |
148 | } while (bin2hex($binary) != strtolower($object_wanted)); |
| 140 | if ($debug) echo "Exact object no = $object_no\n"; |
149 | if ($debug) echo "Exact object no = $object_no\n"; |
| 141 | 150 | ||
| 142 | if ($version == 2) { |
151 | if ($version == 2) { |
| 143 | // Get CRC32 |
152 | // Get CRC32 |
| 144 | // TODO: is this correct? or do we need to read 'H8' ? |
- | |
| 145 | fseek($fp, $fanout_offset + 4*256 + 20*$num_objects + 4*$object_no); |
153 | fseek($fp, $fanout_offset + 4*256 + 20*$num_objects + 4*$object_no); |
| 146 | $crc32 = unpack('N', fread($fp,4))[1]; |
154 | $crc32 = unpack('H8', fread($fp,4))[1]; |
| 147 | if ($debug) echo "CRC32 = ".sprintf('0x%08x',$crc32)."\n"; |
155 | if ($debug) echo "CRC32 = ".$crc32."\n"; |
| 148 | 156 | ||
| 149 | // Get offset (32 bit) |
157 | // Get offset (32 bit) |
| 150 | fseek($fp, $fanout_offset + 4*256 + 20*$num_objects + 4*$num_objects + 4*$object_no); |
158 | fseek($fp, $fanout_offset + 4*256 + 20*$num_objects + 4*$num_objects + 4*$object_no); |
| 151 | $offset_info = unpack('N', fread($fp,4))[1]; |
159 | $offset_info = unpack('N', fread($fp,4))[1]; |
| 152 | if ($offset_info >= 0x80000000) { |
160 | if ($offset_info >= 0x80000000) { |
| 153 | // MSB set, so the offset is 64 bit |
161 | // MSB set, so the offset is 64 bit |
| 154 | if ($debug) echo "64 bit pack offset\n"; |
162 | if ($debug) echo "64 bit pack offset\n"; |
| 155 | $offset_info &= 0x7FFFFFFF; |
163 | $offset_info &= 0x7FFFFFFF; |
| 156 | fseek($fp, $fanout_offset + 4*256 + 20*$num_objects + 4*$num_objects + 4*$num_objects + 8*$offset_info); |
164 | fseek($fp, $fanout_offset + 4*256 + 20*$num_objects + 4*$num_objects + 4*$num_objects + 8*$offset_info); |
| 157 | $pack_offset = unpack('J', fread($fp,8))[1]; |
165 | $pack_offset = unpack('J', fread($fp,8))[1]; |
| 158 | } else { |
166 | } else { |
| 159 | // MSB is not set, so the offset is 32 bit |
167 | // MSB is not set, so the offset is 32 bit |
| 160 | if ($debug) echo "32 bit pack offset\n"; |
168 | if ($debug) echo "32 bit pack offset\n"; |
| 161 | $offset_info &= 0x7FFFFFFF; |
169 | $offset_info &= 0x7FFFFFFF; |
| 162 | $pack_offset = $offset_info; |
170 | $pack_offset = $offset_info; |
| 163 | } |
171 | } |
| 164 | } |
172 | } |
| 165 | 173 | ||
| 166 | if ($debug) echo "Pack file offset = ".sprintf('0x%x',$pack_offset)."\n"; |
174 | if ($debug) echo "Pack file offset = ".sprintf('0x%x',$pack_offset)."\n"; |
| 167 | 175 | ||
| 168 | // Close index file |
176 | // Close index file |
| 169 | fclose($fp); |
177 | fclose($fp); |
| 170 | 178 | ||
| 171 | // Open pack file |
179 | // Open pack file |
| 172 | $fp = fopen($pack_file, 'rb'); |
180 | $fp = fopen($pack_file, 'rb'); |
| 173 | if (!$fp) throw new Exception("Cannot open pack file $pack_file"); |
181 | if (!$fp) throw new Exception("Cannot open pack file $pack_file"); |
| 174 | 182 | ||
| 175 | // Find out type |
183 | // Read type and first part of the size |
| 176 | fseek($fp, $pack_offset); |
184 | fseek($fp, $pack_offset); |
| 177 | $size_info = unpack('C', fread($fp,1))[1]; |
185 | $size_info = unpack('C', fread($fp,1))[1]; |
| 178 | 186 | ||
| - | 187 | // Detect type |
|
| 179 | $type = ($size_info & 0x70) >> 4; /*0b01110000*/ |
188 | $type = ($size_info & 0x70) >> 4; /*0b01110000*/ |
| 180 | switch ($type) { |
189 | switch ($type) { |
| 181 | case 1: |
190 | case 1: |
| 182 | if ($debug) echo "Type = OBJ_COMMIT ($type)\n"; |
191 | if ($debug) echo "Type = OBJ_COMMIT ($type)\n"; |
| 183 | break; |
192 | break; |
| 184 | case 2: |
193 | case 2: |
| 185 | if ($debug) echo "Type = OBJ_TREE ($type)\n"; |
194 | if ($debug) echo "Type = OBJ_TREE ($type)\n"; |
| 186 | break; |
195 | break; |
| 187 | case 3: |
196 | case 3: |
| 188 | if ($debug) echo "Type = OBJ_BLOB ($type)\n"; |
197 | if ($debug) echo "Type = OBJ_BLOB ($type)\n"; |
| 189 | break; |
198 | break; |
| 190 | case 4: |
199 | case 4: |
| 191 | if ($debug) echo "Type = OBJ_TAG ($type)\n"; |
200 | if ($debug) echo "Type = OBJ_TAG ($type)\n"; |
| 192 | break; |
201 | break; |
| 193 | case 6: |
202 | case 6: |
| 194 | if ($debug) echo "Type = OBJ_OFS_DELTA ($type)\n"; |
203 | if ($debug) echo "Type = OBJ_OFS_DELTA ($type)\n"; |
| 195 | break; |
204 | break; |
| 196 | case 7: |
205 | case 7: |
| 197 | if ($debug) echo "Type = OBJ_REF_DELTA ($type)\n"; |
206 | if ($debug) echo "Type = OBJ_REF_DELTA ($type)\n"; |
| 198 | break; |
207 | break; |
| 199 | default: |
208 | default: |
| 200 | if ($debug) echo "Type = Invalid ($type)\n"; |
209 | if ($debug) echo "Type = Invalid ($type)\n"; |
| 201 | break; |
210 | break; |
| 202 | } |
211 | } |
| 203 | 212 | ||
| 204 | // Find out size |
213 | // Find out the expected unpacked size |
| 205 | $size = $size_info & 0xF /*0x00001111*/; |
214 | $size = $size_info & 0xF /*0x00001111*/; |
| 206 | $shift_info = 4; |
215 | $shift_info = 4; |
| 207 | while ($size_info >= 0x80) { |
216 | while ($size_info >= 0x80) { |
| 208 | $size_info = unpack('C', fread($fp,1))[1]; |
217 | $size_info = unpack('C', fread($fp,1))[1]; |
| 209 | $size = (($size_info & 0x7F) << $shift_info) + $size; |
218 | $size = (($size_info & 0x7F) << $shift_info) + $size; |
| 210 | $shift_info += 7; |
219 | $shift_info += 7; |
| 211 | } |
220 | } |
| 212 | - | ||
| 213 | // TODO: Is this the packed or unpacked size? http://driusan.github.io/git-pack.html |
- | |
| 214 | if ($debug) echo "Packed size = ".sprintf('0x%x',$size)."\n"; |
221 | if ($debug) echo "Expected unpacked size = $size\n"; |
| 215 | 222 | ||
| 216 | // Read delta base type |
223 | // Read delta base type |
| - | 224 | // Example implementation: https://github.com/AlexFBP/glip/blob/master/lib/git.class.php#L240 |
|
| 217 | if ($type == 6/*OBJ_OFS_DELTA*/) { |
225 | if ($type == 6/*OBJ_OFS_DELTA*/) { |
| 218 | // "a negative relative offset from the delta object's position in the pack if this is an OBJ_OFS_DELTA object" |
226 | // "a negative relative offset from the delta object's position in the pack if this is an OBJ_OFS_DELTA object" |
| 219 | 227 | ||
| 220 | // Offset encoding |
228 | // Offset encoding |
| 221 | $offset = 0; |
229 | $offset = 0; |
| 222 | $shift_info = 0; |
230 | $shift_info = 0; |
| 223 | do { |
231 | do { |
| 224 | $offset_info = unpack('C', fread($fp,1))[1]; |
232 | $offset_info = unpack('C', fread($fp,1))[1]; |
| 225 | $offset = (($offset_info & 0x7F) << $shift_info) + $offset; |
233 | $offset = (($offset_info & 0x7F) << $shift_info) + $offset; |
| 226 | $shift_info += 7; |
234 | $shift_info += 7; |
| 227 | } while ($offset_info >= 0x80); |
235 | } while ($offset_info >= 0x80); |
| 228 | 236 | ||
| 229 | if ($debug) echo "Delta negative offset: $offset\n"; |
237 | if ($debug) echo "Delta negative offset: $offset\n"; |
| 230 | throw new Exception("OBJ_OFS_DELTA is currently not implemented"); // TODO! Implement OBJ_OFS_DELTA! |
238 | throw new Exception("OBJ_OFS_DELTA is currently not implemented"); // TODO! Implement OBJ_OFS_DELTA! |
| 231 | } |
239 | } |
| 232 | if ($type == 7/*OBJ_REF_DELTA*/) { |
240 | if ($type == 7/*OBJ_REF_DELTA*/) { |
| 233 | // "base object name if OBJ_REF_DELTA" |
241 | // "base object name if OBJ_REF_DELTA" |
| 234 | $delta_info = bin2hex(fread($fp,20)); |
242 | $delta_info = bin2hex(fread($fp,20)); |
| 235 | if ($debug) echo "Delta base object name: $delta_info\n"; |
243 | if ($debug) echo "Delta base object name: $delta_info\n"; |
| 236 | throw new Exception("OBJ_REF_DELTA is currently not implemented"); // TODO! Implement OBJ_REF_DELTA! |
244 | throw new Exception("OBJ_REF_DELTA is currently not implemented"); // TODO! Implement OBJ_REF_DELTA! |
| 237 | } |
245 | } |
| 238 | 246 | ||
| 239 | // Read compressed data |
247 | // Read and uncompress the compressed data |
| 240 | $compressed = fread($fp,$size); |
248 | $compressed = ''; |
| 241 | - | ||
| 242 | // Uncompress |
249 | $uncompressed = false; |
| - | 250 | for ($compressed_size=1; $compressed_size<=32768*$size; $compressed_size++) { |
|
| - | 251 | // Since we don't know the compressed size, we need to do trial and error |
|
| - | 252 | // TODO: this is a super stupid algorithm! Is there a better way??? |
|
| - | 253 | $compressed .= fread($fp,1); |
|
| 243 | $uncompressed = @gzuncompress($compressed); |
254 | $uncompressed = @gzuncompress($compressed); |
| - | 255 | if (strlen($uncompressed) === $size) { |
|
| - | 256 | if ($debug) echo "Detected compressed size = $compressed_size\n"; |
|
| - | 257 | break; |
|
| - | 258 | } |
|
| - | 259 | } |
|
| 244 | if ($uncompressed === false) throw new Exception("Decompression failed"); |
260 | if ($uncompressed === false) throw new Exception("Decompression failed"); |
| 245 | if ($debug) echo "$uncompressed\n"; |
261 | if ($debug) echo "$uncompressed\n"; |
| 246 | 262 | ||
| 247 | // Close pack file |
263 | // Close pack file |
| 248 | fclose($fp); |
264 | fclose($fp); |
| 249 | 265 | ||
| - | 266 | if ($version == 2) { |
|
| 250 | // Check CRC32 |
267 | // Check CRC32 |
| 251 | // TODO: Does not fit; neither crc32, nor crc32b... |
268 | // TODO: Hash does not match. What are we doing wrong?! |
| 252 | // if ($debug) echo "CRC32 found = 0x".hash('crc32',$compressed)." vs $crc32\n"; |
269 | // if ($debug) echo "CRC32 found = ".hash('crc32',$compressed)." vs $crc32\n"; |
| - | 270 | // if ($debug) echo "CRC32 found = ".hash('crc32b',$compressed)." vs $crc32\n"; |
|
| - | 271 | } |
|
| 253 | 272 | ||
| 254 | return $uncompressed; |
273 | return $uncompressed; |
| 255 | } |
274 | } |
| 256 | 275 | ||