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| 1 | +import path from "node:path"; |
| 2 | + |
| 3 | +const JS_DIST_FILE_RE = /^dist\/.*\.(?:cjs|js|mjs)$/u; |
| 4 | + |
| 5 | +function normalizePackagePath(value) { |
| 6 | + return value.replace(/\\/gu, "/").replace(/^package\//u, ""); |
| 7 | +} |
| 8 | + |
| 9 | +function stripSpecifierSuffix(value) { |
| 10 | + return value.replace(/[?#].*$/u, ""); |
| 11 | +} |
| 12 | + |
| 13 | +function resolveDistImportPath(importerPath, specifier) { |
| 14 | + if (!specifier.startsWith(".")) { |
| 15 | + return null; |
| 16 | + } |
| 17 | + const stripped = stripSpecifierSuffix(specifier); |
| 18 | + if (!stripped) { |
| 19 | + return null; |
| 20 | + } |
| 21 | + return path.posix.normalize(path.posix.join(path.posix.dirname(importerPath), stripped)); |
| 22 | +} |
| 23 | + |
| 24 | +function findStatementStart(source, index) { |
| 25 | + return ( |
| 26 | + Math.max( |
| 27 | + source.lastIndexOf(";", index), |
| 28 | + source.lastIndexOf("{", index), |
| 29 | + source.lastIndexOf("}", index), |
| 30 | + source.lastIndexOf("\n", index), |
| 31 | + source.lastIndexOf("\r", index), |
| 32 | + ) + 1 |
| 33 | + ); |
| 34 | +} |
| 35 | + |
| 36 | +function isImportSpecifierContext(source, index) { |
| 37 | + const dynamicPrefix = source.slice(Math.max(0, index - 32), index); |
| 38 | + if (/\bimport\s*\(\s*$/u.test(dynamicPrefix)) { |
| 39 | + return true; |
| 40 | + } |
| 41 | + const statementPrefix = source.slice(findStatementStart(source, index), index).trimStart(); |
| 42 | + return ( |
| 43 | + /^(?:import|export)\b[\s\S]*\bfrom\s*$/u.test(statementPrefix) || |
| 44 | + /^import\s*$/u.test(statementPrefix) |
| 45 | + ); |
| 46 | +} |
| 47 | + |
| 48 | +function collectImportSpecifiers(source) { |
| 49 | + const specifiers = []; |
| 50 | + let inBlockComment = false; |
| 51 | + let inLineComment = false; |
| 52 | + for (let index = 0; index < source.length; index += 1) { |
| 53 | + if (inBlockComment) { |
| 54 | + if (source[index] === "*" && source[index + 1] === "/") { |
| 55 | + inBlockComment = false; |
| 56 | + index += 1; |
| 57 | + } |
| 58 | + continue; |
| 59 | + } |
| 60 | + if (inLineComment) { |
| 61 | + if (source[index] === "\n" || source[index] === "\r") { |
| 62 | + inLineComment = false; |
| 63 | + } |
| 64 | + continue; |
| 65 | + } |
| 66 | + if (source[index] === "/" && source[index + 1] === "*") { |
| 67 | + inBlockComment = true; |
| 68 | + index += 1; |
| 69 | + continue; |
| 70 | + } |
| 71 | + if (source[index] === "/" && source[index + 1] === "/") { |
| 72 | + inLineComment = true; |
| 73 | + index += 1; |
| 74 | + continue; |
| 75 | + } |
| 76 | + |
| 77 | + const quote = source[index]; |
| 78 | + if (quote !== '"' && quote !== "'") { |
| 79 | + continue; |
| 80 | + } |
| 81 | + |
| 82 | + let cursor = index + 1; |
| 83 | + let value = ""; |
| 84 | + while (cursor < source.length) { |
| 85 | + const char = source[cursor]; |
| 86 | + if (char === "\\") { |
| 87 | + value += source.slice(cursor, cursor + 2); |
| 88 | + cursor += 2; |
| 89 | + continue; |
| 90 | + } |
| 91 | + if (char === quote) { |
| 92 | + break; |
| 93 | + } |
| 94 | + value += char; |
| 95 | + cursor += 1; |
| 96 | + } |
| 97 | + if (cursor >= source.length) { |
| 98 | + break; |
| 99 | + } |
| 100 | + |
| 101 | + if (value.startsWith(".")) { |
| 102 | + if (isImportSpecifierContext(source, index)) { |
| 103 | + specifiers.push(value); |
| 104 | + } |
| 105 | + } |
| 106 | + index = cursor; |
| 107 | + } |
| 108 | + return specifiers; |
| 109 | +} |
| 110 | + |
| 111 | +export function collectPackageDistImportErrors(params) { |
| 112 | + const files = [...new Set(params.files.map(normalizePackagePath))]; |
| 113 | + const fileSet = new Set(files); |
| 114 | + const errors = []; |
| 115 | + |
| 116 | + for (const importerPath of files.toSorted((left, right) => left.localeCompare(right))) { |
| 117 | + if (!JS_DIST_FILE_RE.test(importerPath) || importerPath.includes("/node_modules/")) { |
| 118 | + continue; |
| 119 | + } |
| 120 | + const source = params.readText(importerPath); |
| 121 | + for (const specifier of collectImportSpecifiers(source)) { |
| 122 | + const importedPath = resolveDistImportPath(importerPath, specifier); |
| 123 | + if (!importedPath || fileSet.has(importedPath)) { |
| 124 | + continue; |
| 125 | + } |
| 126 | + errors.push(`${importerPath} imports missing ${importedPath}`); |
| 127 | + } |
| 128 | + } |
| 129 | + |
| 130 | + return errors; |
| 131 | +} |
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