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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\GitIgnore; |
| 20 | |
| 21 | /** |
| 22 | * Merges, deduplicates, and sorts .gitignore entries. |
| 23 | * |
| 24 | * This service SHALL combine canonical and project-specific .gitignore |
| 25 | * definitions into a single normalized result. The resulting entry list MUST |
| 26 | * exclude blank lines and comment lines from the merged output, MUST remove |
| 27 | * duplicate entries, and MUST group directory entries before file entries. |
| 28 | * Directory and file groups SHALL be sorted independently in ascending string |
| 29 | * order to provide deterministic output. |
| 30 | */ |
| 31 | class Merger implements MergerInterface |
| 32 | { |
| 33 | /** |
| 34 | * Initializes the merger with a classifier implementation. |
| 35 | * |
| 36 | * The classifier MUST be capable of determining whether a normalized |
| 37 | * .gitignore entry represents a directory or a file pattern. When no |
| 38 | * classifier is provided, a default Classifier instance SHALL be used. |
| 39 | * |
| 40 | * @param ClassifierInterface $classifier the classifier responsible for |
| 41 | * distinguishing directory entries |
| 42 | * from file entries during merging |
| 43 | */ |
| 44 | public function __construct( |
| 45 | private ClassifierInterface $classifier = new Classifier() |
| 46 | ) {} |
| 47 | |
| 48 | /** |
| 49 | * Merges canonical and project .gitignore entries into a normalized result. |
| 50 | * |
| 51 | * The implementation MUST combine entries from both sources, MUST remove |
| 52 | * duplicates, and MUST ignore blank or commented entries after trimming. |
| 53 | * Entries identified as directories SHALL be collected separately from file |
| 54 | * entries. Each group MUST be sorted using string comparison, and directory |
| 55 | * entries MUST appear before file entries in the final result. |
| 56 | * |
| 57 | * The returned GitIgnore instance SHALL preserve the project path provided by |
| 58 | * the $project argument. |
| 59 | * |
| 60 | * @param GitIgnoreInterface $canonical The canonical .gitignore source whose |
| 61 | * entries provide the shared baseline. |
| 62 | * @param GitIgnoreInterface $project The project-specific .gitignore source |
| 63 | * whose path MUST be preserved in the |
| 64 | * merged result. |
| 65 | * |
| 66 | * @return GitIgnoreInterface A new merged .gitignore representation containing |
| 67 | * normalized, deduplicated, and ordered entries. |
| 68 | */ |
| 69 | public function merge(GitIgnoreInterface $canonical, GitIgnoreInterface $project): GitIgnoreInterface |
| 70 | { |
| 71 | $entries = array_unique(array_merge($canonical->entries(), $project->entries())); |
| 72 | |
| 73 | $directories = []; |
| 74 | $files = []; |
| 75 | |
| 76 | foreach ($entries as $entry) { |
| 77 | $trimmed = trim($entry); |
| 78 | if ('' === $trimmed) { |
| 79 | continue; |
| 80 | } |
| 81 | |
| 82 | if (str_starts_with($trimmed, '#')) { |
| 83 | continue; |
| 84 | } |
| 85 | |
| 86 | if ($this->classifier->isDirectory($trimmed)) { |
| 87 | $directories[] = $trimmed; |
| 88 | } else { |
| 89 | $files[] = $trimmed; |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | sort($directories, \SORT_STRING); |
| 94 | sort($files, \SORT_STRING); |
| 95 | |
| 96 | $mergedEntries = array_merge($directories, $files); |
| 97 | |
| 98 | return new GitIgnore($project->path(), array_values($mergedEntries)); |
| 99 | } |
| 100 | } |