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| 1 | +<?php |
| 2 | +/** |
| 3 | + * Small linter that can detect and fix some code style violations |
| 4 | + * |
| 5 | + * Usage: |
| 6 | + * php lint.php // Show errors. |
| 7 | + * php lint.php --fix // Auto-fix errors where supported. |
| 8 | + * |
| 9 | + * @since 3.18.0 |
| 10 | + */ |
| 11 | + |
| 12 | +// Configuration. |
| 13 | +$config = array( |
| 14 | + new Lint_Rule( |
| 15 | + 'Two or more consecutive empty lines found', |
| 16 | + '/(\r?\n){3,}/', |
| 17 | + '/\.(php|js|css|html|scss|yml|md|ts|tsx|sh|json)$/', |
| 18 | + "\n\n" |
| 19 | + ), |
| 20 | + new Lint_Rule( |
| 21 | + 'One or more empty lines between closing brackets found', |
| 22 | + '/(\})\n{2,}(\})/', |
| 23 | + '/\.(php|js|css|html|scss|yml|md|ts|tsx|sh|json)$/', |
| 24 | + "$1\n$2" |
| 25 | + ), |
| 26 | +); |
| 27 | + |
| 28 | +// Run the rules and display any errors. |
| 29 | +foreach ( $config as $rule ) { |
| 30 | + $errors = $rule->run( in_array( '--fix', $argv ) ); |
| 31 | + |
| 32 | + if ( '' !== $errors ) { |
| 33 | + $exit_code = 1; |
| 34 | + echo $errors; |
| 35 | + } |
| 36 | +} |
| 37 | + |
| 38 | +exit( $exit_code ?? 0 ); |
| 39 | + |
| 40 | +/** |
| 41 | + * A class representing a linting rule. |
| 42 | + * |
| 43 | + * @since 3.18.0 |
| 44 | + */ |
| 45 | +class Lint_Rule { |
| 46 | + /** |
| 47 | + * @var string Error message to display when this linting rule is violated. |
| 48 | + */ |
| 49 | + private $error_message; |
| 50 | + |
| 51 | + /** |
| 52 | + * @var string Regex pattern used for rule violation detection. |
| 53 | + */ |
| 54 | + private $error_pattern; |
| 55 | + |
| 56 | + /** |
| 57 | + * @var string Regex pattern used to specify the files to search in. |
| 58 | + */ |
| 59 | + private $include_files; |
| 60 | + |
| 61 | + /** |
| 62 | + * @var string|null Optional regex pattern used to auto-fix the violation. |
| 63 | + */ |
| 64 | + private $fix_pattern; |
| 65 | + |
| 66 | + /** |
| 67 | + * @var array<string> Directories to exclude from search. |
| 68 | + */ |
| 69 | + private $exclude_dirs; |
| 70 | + |
| 71 | + /** |
| 72 | + * @var array<string> Array of errors found when running the rule. |
| 73 | + */ |
| 74 | + private $errors = array(); |
| 75 | + |
| 76 | + /** |
| 77 | + * Constructor. |
| 78 | + * |
| 79 | + * @since 3.18.0 |
| 80 | + * |
| 81 | + * @param string $error_message The error message to display. |
| 82 | + * @param string $error_pattern The regex matching the rule violation. |
| 83 | + * @param string $include_files The regex matching the files to search in. |
| 84 | + * @param string|null $fix_pattern The regex to fix any violations (optional). |
| 85 | + * @param array<string> $exclude_dirs The directories to exclude from search. |
| 86 | + */ |
| 87 | + public function __construct( |
| 88 | + string $error_message, |
| 89 | + string $error_pattern, |
| 90 | + string $include_files, |
| 91 | + string $fix_pattern = null, |
| 92 | + array $exclude_dirs = array( 'artifacts', 'build', 'vendor', 'node_modules' ) |
| 93 | + ) { |
| 94 | + $this->error_message = $error_message; |
| 95 | + $this->error_pattern = $error_pattern; |
| 96 | + $this->include_files = $include_files; |
| 97 | + $this->fix_pattern = $fix_pattern; |
| 98 | + $this->exclude_dirs = $exclude_dirs; |
| 99 | + } |
| 100 | + |
| 101 | + /** |
| 102 | + * Runs the rule to detect or auto-fix any violations. |
| 103 | + * |
| 104 | + * @since 3.18.0 |
| 105 | + * |
| 106 | + * @param bool $auto_fix_mode Whether violations should be auto-fixed. |
| 107 | + * @return string The violations found, or an empty string. |
| 108 | + */ |
| 109 | + public function run( $auto_fix_mode ): string { |
| 110 | + $base_dir = __DIR__ . '/'; |
| 111 | + $iterator = $this->create_iterator( $this->exclude_dirs ); |
| 112 | + |
| 113 | + // Iterate over the directories and files. |
| 114 | + foreach ( $iterator as $file ) { |
| 115 | + // Check if the item is a file that should be checked. |
| 116 | + if ( $file->isFile() && preg_match( $this->include_files, $file->getFilename() ) ) { |
| 117 | + $file_content = file_get_contents( $file->getPathname() ); |
| 118 | + |
| 119 | + // Check for rule violations. |
| 120 | + if ( preg_match_all( $this->error_pattern, $file_content, $matches, PREG_OFFSET_CAPTURE ) ) { |
| 121 | + $relative_path = str_replace( $base_dir, '', $file->getPathname() ); |
| 122 | + |
| 123 | + // Auto-fix or log the issue. |
| 124 | + if ( $auto_fix_mode && null !== $this->fix_pattern ) { |
| 125 | + $fixed_content = preg_replace( $this->error_pattern, $this->fix_pattern, $file_content ); |
| 126 | + |
| 127 | + if ( null === $fixed_content ) { |
| 128 | + $this->errors[] = "Error while trying to lint {$relative_path}."; |
| 129 | + } |
| 130 | + |
| 131 | + if ( false === file_put_contents( $file->getPathname(), $fixed_content ) ) { |
| 132 | + $this->errors[] = "Failed to save fix for {$relative_path}."; |
| 133 | + } |
| 134 | + } else { |
| 135 | + foreach ( $matches[0] as $match ) { |
| 136 | + $line_number = substr_count( substr( $file_content, 0, $match[1] ), "\n" ) + 1; |
| 137 | + $this->errors[] = "{$relative_path} \033[90m(line {$line_number})\033[0m"; |
| 138 | + } |
| 139 | + } |
| 140 | + } |
| 141 | + } |
| 142 | + } |
| 143 | + |
| 144 | + if ( empty( $this->errors ) ) { |
| 145 | + return ''; |
| 146 | + } |
| 147 | + |
| 148 | + $output = "\033[31mERROR: {$this->error_message}.\033[0m\n"; |
| 149 | + if ( null !== $this->fix_pattern ) { |
| 150 | + $output .= "\033[33mAuto-fixable with the --fix parameter.\033[0m\n"; |
| 151 | + } |
| 152 | + $output .= "\033[36mYou can use the {$this->error_pattern} regex to find the offending code.\033[0m\n\n"; |
| 153 | + |
| 154 | + foreach ( $this->errors as $error ) { |
| 155 | + $output .= " - {$error}\n"; |
| 156 | + } |
| 157 | + |
| 158 | + return $output . "\n\n"; |
| 159 | + } |
| 160 | + |
| 161 | + /** |
| 162 | + * Creates an iterator that iterates across the project's folder structure, |
| 163 | + * skipping excluded directories. |
| 164 | + * |
| 165 | + * @since 3.18.0 |
| 166 | + * |
| 167 | + * @return RecursiveIteratorIterator |
| 168 | + */ |
| 169 | + private function create_iterator(): RecursiveIteratorIterator { |
| 170 | + return new RecursiveIteratorIterator( |
| 171 | + new RecursiveCallbackFilterIterator( |
| 172 | + new RecursiveDirectoryIterator( __DIR__, RecursiveDirectoryIterator::SKIP_DOTS ), |
| 173 | + function ( $current, $key, $iterator ) { |
| 174 | + if ( $iterator->hasChildren() && in_array( $current->getFilename(), $this->exclude_dirs ) ) { |
| 175 | + return false; // Skip excluded directories. |
| 176 | + } |
| 177 | + |
| 178 | + return true; |
| 179 | + } |
| 180 | + ), |
| 181 | + RecursiveIteratorIterator::SELF_FIRST |
| 182 | + ); |
| 183 | + } |
| 184 | +} |
| 185 | + |
| 186 | +// phpcs:ignoreFile |
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