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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | /** |
| 6 | * This file is part of fast-forward/dev-tools. |
| 7 | * |
| 8 | * This source file is subject to the license bundled |
| 9 | * with this source code in the file LICENSE. |
| 10 | * |
| 11 | * @copyright Copyright (c) 2026 Felipe Sayão Lobato Abreu <github@mentordosnerds.com> |
| 12 | * @license https://opensource.org/licenses/MIT MIT License |
| 13 | * |
| 14 | * @see https://github.com/php-fast-forward/dev-tools |
| 15 | * @see https://github.com/php-fast-forward |
| 16 | * @see https://datatracker.ietf.org/doc/html/rfc2119 |
| 17 | */ |
| 18 | |
| 19 | namespace FastForward\DevTools\GitAttributes; |
| 20 | |
| 21 | use function Safe\preg_split; |
| 22 | use function Safe\preg_replace; |
| 23 | use function Safe\preg_match; |
| 24 | |
| 25 | /** |
| 26 | * Merges .gitattributes content with generated export-ignore rules. |
| 27 | * |
| 28 | * This class preserves existing custom entries while adding missing |
| 29 | * export-ignore rules for known candidate paths, deduplicates semantically |
| 30 | * equivalent entries, and sorts export-ignore rules with directories before |
| 31 | * files. |
| 32 | */ |
| 33 | class Merger implements MergerInterface |
| 34 | { |
| 35 | /** |
| 36 | * Merges generated export-ignore entries with existing .gitattributes content. |
| 37 | * |
| 38 | * This method: |
| 39 | * 1. Preserves custom user-defined entries in their original order |
| 40 | * 2. Adds missing generated export-ignore entries for existing paths |
| 41 | * 3. Deduplicates entries using normalized path comparison |
| 42 | * 4. Sorts export-ignore entries with directories before files |
| 43 | * |
| 44 | * @param string $existingContent The raw .gitattributes content currently stored. |
| 45 | * @param list<string> $exportIgnoreEntries the export-ignore entries to manage |
| 46 | * @param list<string> $keepInExportPaths the paths that MUST remain exported |
| 47 | * |
| 48 | * @return string The merged .gitattributes content |
| 49 | */ |
| 50 | public function merge(string $existingContent, array $exportIgnoreEntries, array $keepInExportPaths = []): string |
| 51 | { |
| 52 | $nonExportIgnoreLines = []; |
| 53 | $seenNonExportIgnoreLines = []; |
| 54 | $exportIgnoreLines = []; |
| 55 | $keptExportLookup = $this->keepInExportLookup($keepInExportPaths); |
| 56 | $generatedDirectoryLookup = $this->generatedDirectoryLookup($exportIgnoreEntries); |
| 57 | |
| 58 | foreach ($this->parseExistingLines($existingContent) as $line) { |
| 59 | $normalizedLine = $this->normalizeLine($line); |
| 60 | |
| 61 | if ('' === $normalizedLine) { |
| 62 | continue; |
| 63 | } |
| 64 | |
| 65 | $pathSpec = $this->extractExportIgnorePathSpec($normalizedLine); |
| 66 | |
| 67 | if (null === $pathSpec) { |
| 68 | if (isset($seenNonExportIgnoreLines[$normalizedLine])) { |
| 69 | continue; |
| 70 | } |
| 71 | |
| 72 | $nonExportIgnoreLines[] = $normalizedLine; |
| 73 | $seenNonExportIgnoreLines[$normalizedLine] = true; |
| 74 | |
| 75 | continue; |
| 76 | } |
| 77 | |
| 78 | $pathKey = $this->normalizePathKey($pathSpec); |
| 79 | if (isset($keptExportLookup[$pathKey])) { |
| 80 | continue; |
| 81 | } |
| 82 | if (isset($exportIgnoreLines[$pathKey])) { |
| 83 | continue; |
| 84 | } |
| 85 | |
| 86 | $exportIgnoreLines[$pathKey] = [ |
| 87 | 'line' => $normalizedLine, |
| 88 | 'sort_key' => $this->sortKey($pathSpec), |
| 89 | 'is_directory' => str_ends_with($pathSpec, '/') || isset($generatedDirectoryLookup[$pathKey]), |
| 90 | ]; |
| 91 | } |
| 92 | |
| 93 | foreach ($exportIgnoreEntries as $entry) { |
| 94 | $trimmedEntry = trim($entry); |
| 95 | $pathKey = $this->normalizePathKey($trimmedEntry); |
| 96 | |
| 97 | if (isset($keptExportLookup[$pathKey])) { |
| 98 | continue; |
| 99 | } |
| 100 | |
| 101 | if (! isset($exportIgnoreLines[$pathKey])) { |
| 102 | $exportIgnoreLines[$pathKey] = [ |
| 103 | 'line' => $trimmedEntry . ' export-ignore', |
| 104 | 'sort_key' => $this->sortKey($trimmedEntry), |
| 105 | 'is_directory' => str_ends_with($trimmedEntry, '/'), |
| 106 | ]; |
| 107 | |
| 108 | continue; |
| 109 | } |
| 110 | |
| 111 | $exportIgnoreLines[$pathKey]['is_directory'] = $exportIgnoreLines[$pathKey]['is_directory'] |
| 112 | || str_ends_with($trimmedEntry, '/'); |
| 113 | } |
| 114 | |
| 115 | $sortedExportIgnoreLines = array_values($exportIgnoreLines); |
| 116 | |
| 117 | usort( |
| 118 | $sortedExportIgnoreLines, |
| 119 | static function (array $left, array $right): int { |
| 120 | if ($left['is_directory'] !== $right['is_directory']) { |
| 121 | return $left['is_directory'] ? -1 : 1; |
| 122 | } |
| 123 | |
| 124 | $naturalOrder = strnatcasecmp($left['sort_key'], $right['sort_key']); |
| 125 | |
| 126 | if (0 !== $naturalOrder) { |
| 127 | return $naturalOrder; |
| 128 | } |
| 129 | |
| 130 | return strcmp($left['sort_key'], $right['sort_key']); |
| 131 | } |
| 132 | ); |
| 133 | |
| 134 | return implode("\n", [...$nonExportIgnoreLines, ...array_column($sortedExportIgnoreLines, 'line')]); |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * Parses the raw .gitattributes content into trimmed non-empty lines. |
| 139 | * |
| 140 | * @param string $content The full .gitattributes content. |
| 141 | * |
| 142 | * @return list<string> the non-empty lines from the file |
| 143 | */ |
| 144 | private function parseExistingLines(string $content): array |
| 145 | { |
| 146 | if ('' === $content) { |
| 147 | return []; |
| 148 | } |
| 149 | |
| 150 | $lines = []; |
| 151 | |
| 152 | foreach (preg_split('/\R/', $content) ?: [] as $line) { |
| 153 | $trimmedLine = trim($line); |
| 154 | |
| 155 | if ('' === $trimmedLine) { |
| 156 | continue; |
| 157 | } |
| 158 | |
| 159 | $lines[] = $trimmedLine; |
| 160 | } |
| 161 | |
| 162 | return $lines; |
| 163 | } |
| 164 | |
| 165 | /** |
| 166 | * Builds a lookup table for paths that MUST stay in the exported archive. |
| 167 | * |
| 168 | * @param list<string> $keepInExportPaths the configured keep-in-export paths |
| 169 | * |
| 170 | * @return array<string, true> the normalized path lookup |
| 171 | */ |
| 172 | private function keepInExportLookup(array $keepInExportPaths): array |
| 173 | { |
| 174 | $lookup = []; |
| 175 | |
| 176 | foreach ($keepInExportPaths as $path) { |
| 177 | $normalizedPath = $this->normalizePathKey($path); |
| 178 | |
| 179 | if ('' === $normalizedPath) { |
| 180 | continue; |
| 181 | } |
| 182 | |
| 183 | $lookup[$normalizedPath] = true; |
| 184 | } |
| 185 | |
| 186 | return $lookup; |
| 187 | } |
| 188 | |
| 189 | /** |
| 190 | * Builds a lookup table of generated directory candidates. |
| 191 | * |
| 192 | * @param list<string> $exportIgnoreEntries the generated export-ignore path list |
| 193 | * |
| 194 | * @return array<string, true> the normalized directory lookup |
| 195 | */ |
| 196 | private function generatedDirectoryLookup(array $exportIgnoreEntries): array |
| 197 | { |
| 198 | $lookup = []; |
| 199 | |
| 200 | foreach ($exportIgnoreEntries as $entry) { |
| 201 | $trimmedEntry = trim($entry); |
| 202 | |
| 203 | if (! str_ends_with($trimmedEntry, '/')) { |
| 204 | continue; |
| 205 | } |
| 206 | |
| 207 | $lookup[$this->normalizePathKey($trimmedEntry)] = true; |
| 208 | } |
| 209 | |
| 210 | return $lookup; |
| 211 | } |
| 212 | |
| 213 | /** |
| 214 | * Normalizes a .gitattributes line for deterministic comparison and output. |
| 215 | * |
| 216 | * @param string $line the raw line to normalize |
| 217 | * |
| 218 | * @return string the normalized line |
| 219 | */ |
| 220 | private function normalizeLine(string $line): string |
| 221 | { |
| 222 | $trimmedLine = trim($line); |
| 223 | |
| 224 | if ('' === $trimmedLine) { |
| 225 | return ''; |
| 226 | } |
| 227 | |
| 228 | if (str_starts_with($trimmedLine, '#')) { |
| 229 | return $trimmedLine; |
| 230 | } |
| 231 | |
| 232 | return preg_replace('/(?<!\\\\)[ \t]+/', ' ', $trimmedLine) ?? $trimmedLine; |
| 233 | } |
| 234 | |
| 235 | /** |
| 236 | * Extracts the path spec from a simple export-ignore line. |
| 237 | * |
| 238 | * @param string $line the line to inspect |
| 239 | * |
| 240 | * @return string|null the extracted path spec when the line is a simple export-ignore rule |
| 241 | */ |
| 242 | private function extractExportIgnorePathSpec(string $line): ?string |
| 243 | { |
| 244 | if (1 !== preg_match('/^(\S+)\s+export-ignore$/', $line, $matches)) { |
| 245 | return null; |
| 246 | } |
| 247 | |
| 248 | return $matches[1]; |
| 249 | } |
| 250 | |
| 251 | /** |
| 252 | * Builds the natural sort key for a path spec. |
| 253 | * |
| 254 | * @param string $pathSpec the raw path spec to normalize for sorting |
| 255 | * |
| 256 | * @return string the natural sort key |
| 257 | */ |
| 258 | private function sortKey(string $pathSpec): string |
| 259 | { |
| 260 | return ltrim($this->normalizePathSpec($pathSpec), '/'); |
| 261 | } |
| 262 | |
| 263 | /** |
| 264 | * Normalizes a gitattributes path spec for sorting. |
| 265 | * |
| 266 | * @param string $pathSpec the raw path spec to normalize |
| 267 | * |
| 268 | * @return string the normalized path spec |
| 269 | */ |
| 270 | private function normalizePathSpec(string $pathSpec): string |
| 271 | { |
| 272 | $trimmedPathSpec = trim($pathSpec); |
| 273 | |
| 274 | if ('' === $trimmedPathSpec) { |
| 275 | return ''; |
| 276 | } |
| 277 | |
| 278 | $isDirectory = str_ends_with($trimmedPathSpec, '/'); |
| 279 | $normalizedPathSpec = preg_replace('#/+#', '/', '/' . ltrim($trimmedPathSpec, '/')) ?? $trimmedPathSpec; |
| 280 | $normalizedPathSpec = '/' === $normalizedPathSpec ? $normalizedPathSpec : rtrim($normalizedPathSpec, '/'); |
| 281 | |
| 282 | if ($isDirectory && '/' !== $normalizedPathSpec) { |
| 283 | $normalizedPathSpec .= '/'; |
| 284 | } |
| 285 | |
| 286 | return $normalizedPathSpec; |
| 287 | } |
| 288 | |
| 289 | /** |
| 290 | * Normalizes a path spec for deduplication and keep-in-export matching. |
| 291 | * |
| 292 | * Literal root paths are compared without leading slash differences, while |
| 293 | * pattern-based specs preserve their original anchoring semantics. |
| 294 | * |
| 295 | * @param string $pathSpec the raw path spec to normalize |
| 296 | * |
| 297 | * @return string the normalized deduplication key |
| 298 | */ |
| 299 | private function normalizePathKey(string $pathSpec): string |
| 300 | { |
| 301 | $normalizedPathSpec = $this->normalizePathSpec($pathSpec); |
| 302 | |
| 303 | if ($this->isLiteralPathSpec($normalizedPathSpec)) { |
| 304 | return ltrim(rtrim($normalizedPathSpec, '/'), '/'); |
| 305 | } |
| 306 | |
| 307 | return $normalizedPathSpec; |
| 308 | } |
| 309 | |
| 310 | /** |
| 311 | * Determines whether a path spec is a literal path and not a glob pattern. |
| 312 | * |
| 313 | * @param string $pathSpec the normalized path spec to inspect |
| 314 | * |
| 315 | * @return bool true when the path spec is a literal path |
| 316 | */ |
| 317 | private function isLiteralPathSpec(string $pathSpec): bool |
| 318 | { |
| 319 | return ! str_contains($pathSpec, '*') |
| 320 | && ! str_contains($pathSpec, '?') |
| 321 | && ! str_contains($pathSpec, '[') |
| 322 | && ! str_contains($pathSpec, '{'); |
| 323 | } |
| 324 | } |