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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | /** |
| 6 | * Fast Forward Development Tools for PHP projects. |
| 7 | * |
| 8 | * This file is part of fast-forward/dev-tools project. |
| 9 | * |
| 10 | * @author Felipe Sayão Lobato Abreu <github@mentordosnerds.com> |
| 11 | * @license https://opensource.org/licenses/MIT MIT License |
| 12 | * |
| 13 | * @see https://github.com/php-fast-forward/ |
| 14 | * @see https://github.com/php-fast-forward/dev-tools |
| 15 | * @see https://github.com/php-fast-forward/dev-tools/issues |
| 16 | * @see https://php-fast-forward.github.io/dev-tools/ |
| 17 | * @see https://datatracker.ietf.org/doc/html/rfc2119 |
| 18 | */ |
| 19 | |
| 20 | namespace FastForward\DevTools\GitAttributes; |
| 21 | |
| 22 | use function Safe\preg_split; |
| 23 | use function Safe\preg_replace; |
| 24 | use function Safe\preg_match; |
| 25 | |
| 26 | /** |
| 27 | * Merges .gitattributes content with generated export-ignore rules. |
| 28 | * |
| 29 | * This class preserves existing custom entries while adding missing |
| 30 | * export-ignore defaults before consumer rules. Existing rules MUST retain their |
| 31 | * order and repetitions so later unset and unspecified attributes keep precedence. |
| 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. Prepends missing generated defaults before consumer overrides |
| 41 | * 3. Omits generated duplicates without deduplicating existing rules |
| 42 | * 4. Removes simple positive rules for explicitly kept paths |
| 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 | $existingLines = []; |
| 53 | $existingRules = []; |
| 54 | $keptExportLookup = $this->keepInExportLookup($keepInExportPaths); |
| 55 | |
| 56 | foreach ($this->parseExistingLines($existingContent) as $line) { |
| 57 | $pathSpec = $this->extractExportIgnorePathSpec($line); |
| 58 | |
| 59 | if (null !== $pathSpec) { |
| 60 | $pathKey = $this->normalizePathKey($pathSpec); |
| 61 | |
| 62 | if ($this->isKeptPath($pathKey, $keptExportLookup)) { |
| 63 | continue; |
| 64 | } |
| 65 | |
| 66 | $existingRules[$pathKey] = true; |
| 67 | } |
| 68 | |
| 69 | $existingLines[] = $line; |
| 70 | } |
| 71 | |
| 72 | $generatedLines = []; |
| 73 | |
| 74 | foreach ($exportIgnoreEntries as $entry) { |
| 75 | $entry = trim($entry); |
| 76 | $pathKey = $this->normalizePathKey($entry); |
| 77 | |
| 78 | if ('' === $entry || $this->isKeptPath($pathKey, $keptExportLookup) || isset($existingRules[$pathKey])) { |
| 79 | continue; |
| 80 | } |
| 81 | |
| 82 | $generatedLines[] = $entry . ' export-ignore'; |
| 83 | $existingRules[$pathKey] = true; |
| 84 | } |
| 85 | |
| 86 | return implode("\n", [...$generatedLines, ...$existingLines]); |
| 87 | } |
| 88 | |
| 89 | /** |
| 90 | * Parses the raw .gitattributes content into trimmed non-empty lines. |
| 91 | * |
| 92 | * @param string $content The full .gitattributes content. |
| 93 | * |
| 94 | * @return list<string> the non-empty lines from the file |
| 95 | */ |
| 96 | private function parseExistingLines(string $content): array |
| 97 | { |
| 98 | if ('' === $content) { |
| 99 | return []; |
| 100 | } |
| 101 | |
| 102 | $lines = []; |
| 103 | |
| 104 | foreach (preg_split('/\R/', $content) as $line) { |
| 105 | $trimmedLine = trim((string) $line); |
| 106 | |
| 107 | if ('' === $trimmedLine) { |
| 108 | continue; |
| 109 | } |
| 110 | |
| 111 | $lines[] = $trimmedLine; |
| 112 | } |
| 113 | |
| 114 | return $lines; |
| 115 | } |
| 116 | |
| 117 | /** |
| 118 | * Builds a lookup table for paths that MUST stay in the exported archive. |
| 119 | * |
| 120 | * @param list<string> $keepInExportPaths the configured keep-in-export paths |
| 121 | * |
| 122 | * @return array<string, true> the normalized path lookup |
| 123 | */ |
| 124 | private function keepInExportLookup(array $keepInExportPaths): array |
| 125 | { |
| 126 | $lookup = []; |
| 127 | |
| 128 | foreach ($keepInExportPaths as $path) { |
| 129 | $normalizedPath = $this->normalizePathKey($path); |
| 130 | |
| 131 | if ('' === $normalizedPath) { |
| 132 | continue; |
| 133 | } |
| 134 | |
| 135 | $lookup[$normalizedPath] = true; |
| 136 | } |
| 137 | |
| 138 | return $lookup; |
| 139 | } |
| 140 | |
| 141 | /** |
| 142 | * @param string $pathKey |
| 143 | * @param array<string, true> $keptExportLookup |
| 144 | */ |
| 145 | private function isKeptPath(string $pathKey, array $keptExportLookup): bool |
| 146 | { |
| 147 | foreach (array_keys($keptExportLookup) as $keptPath) { |
| 148 | if ($pathKey === $keptPath || str_starts_with($pathKey . '/', $keptPath . '/')) { |
| 149 | return true; |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | return false; |
| 154 | } |
| 155 | |
| 156 | /** |
| 157 | * Extracts the path spec from a simple export-ignore line. |
| 158 | * |
| 159 | * @param string $line the line to inspect |
| 160 | * |
| 161 | * @return string|null the extracted path spec when the line is a simple export-ignore rule |
| 162 | */ |
| 163 | private function extractExportIgnorePathSpec(string $line): ?string |
| 164 | { |
| 165 | if (1 !== preg_match('/^(\S+)\s+export-ignore$/', $line, $matches)) { |
| 166 | return null; |
| 167 | } |
| 168 | |
| 169 | return $matches[1]; |
| 170 | } |
| 171 | |
| 172 | /** |
| 173 | * Normalizes a gitattributes path spec for sorting. |
| 174 | * |
| 175 | * @param string $pathSpec the raw path spec to normalize |
| 176 | * |
| 177 | * @return string the normalized path spec |
| 178 | */ |
| 179 | private function normalizePathSpec(string $pathSpec): string |
| 180 | { |
| 181 | $trimmedPathSpec = trim($pathSpec); |
| 182 | |
| 183 | if ('' === $trimmedPathSpec) { |
| 184 | return ''; |
| 185 | } |
| 186 | |
| 187 | $isDirectory = str_ends_with($trimmedPathSpec, '/'); |
| 188 | $normalizedPathSpec = preg_replace('#/+#', '/', '/' . ltrim($trimmedPathSpec, '/')) ?? $trimmedPathSpec; |
| 189 | $normalizedPathSpec = '/' === $normalizedPathSpec ? $normalizedPathSpec : rtrim($normalizedPathSpec, '/'); |
| 190 | |
| 191 | if ($isDirectory && '/' !== $normalizedPathSpec) { |
| 192 | $normalizedPathSpec .= '/'; |
| 193 | } |
| 194 | |
| 195 | return $normalizedPathSpec; |
| 196 | } |
| 197 | |
| 198 | /** |
| 199 | * Normalizes a path spec for deduplication and keep-in-export matching. |
| 200 | * |
| 201 | * Literal root paths are compared without leading slash differences, while |
| 202 | * pattern-based specs preserve their original anchoring semantics. |
| 203 | * |
| 204 | * @param string $pathSpec the raw path spec to normalize |
| 205 | * |
| 206 | * @return string the normalized deduplication key |
| 207 | */ |
| 208 | private function normalizePathKey(string $pathSpec): string |
| 209 | { |
| 210 | $normalizedPathSpec = $this->normalizePathSpec($pathSpec); |
| 211 | |
| 212 | if ($this->isLiteralPathSpec($normalizedPathSpec)) { |
| 213 | return ltrim(rtrim($normalizedPathSpec, '/'), '/'); |
| 214 | } |
| 215 | |
| 216 | return trim($pathSpec); |
| 217 | } |
| 218 | |
| 219 | /** |
| 220 | * Determines whether a path spec is a literal path and not a glob pattern. |
| 221 | * |
| 222 | * @param string $pathSpec the normalized path spec to inspect |
| 223 | * |
| 224 | * @return bool true when the path spec is a literal path |
| 225 | */ |
| 226 | private function isLiteralPathSpec(string $pathSpec): bool |
| 227 | { |
| 228 | return ! str_contains($pathSpec, '*') |
| 229 | && ! str_contains($pathSpec, '?') |
| 230 | && ! str_contains($pathSpec, '[') |
| 231 | && ! str_contains($pathSpec, '{'); |
| 232 | } |
| 233 | } |