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| 1 | +// noinspection JSUnusedLocalSymbols,JSUnusedAssignment |
| 2 | + |
| 3 | +import path from "path"; |
| 4 | +import { normalizePath, Pattern, removePrefix, removeSuffix, ResolvedModuleFull } from "typescript"; |
| 5 | + |
| 6 | +/* ****************************************************************************************************************** */ |
| 7 | +// region: Types |
| 8 | +/* ****************************************************************************************************************** */ |
| 9 | + |
| 10 | +export interface OutputPathDetail { |
| 11 | + isImplicitExtension: boolean |
| 12 | + isExternalLibraryImport: boolean |
| 13 | + resolvedExt: string | undefined; |
| 14 | + resolvedPath: string; |
| 15 | + outputPath: string | undefined; |
| 16 | + suppliedExt: string | undefined; |
| 17 | + implicitPath?: string; |
| 18 | + /** Package name from package.json */ |
| 19 | + packageName?: string; |
| 20 | + /** Package name as written (could differ due to npm aliasing) */ |
| 21 | + suppliedPackageName?: string |
| 22 | + suppliedPackagePath?: string |
| 23 | + packagePath?: string; |
| 24 | + tsPathMatch?: string; |
| 25 | +} |
| 26 | + |
| 27 | +// endregion |
| 28 | + |
| 29 | +/* ****************************************************************************************************************** */ |
| 30 | +// region: Helpers |
| 31 | +/* ****************************************************************************************************************** */ |
| 32 | + |
| 33 | +const pkgRegex = /^((@[^/]+\/[^/@]+)|([^@/]+))(?:\/([^@]+?))?$/; |
| 34 | + |
| 35 | +/** @internal */ |
| 36 | +function getPaths(supplied: string, resolved: string) { |
| 37 | + let endMatchPos = 0; |
| 38 | + for (let i = 0; i < supplied.length && i < resolved.length; i++) { |
| 39 | + if (supplied[i] !== resolved[i]) { |
| 40 | + endMatchPos = i; |
| 41 | + break; |
| 42 | + } |
| 43 | + } |
| 44 | + |
| 45 | + const outputPath = supplied.slice(0, endMatchPos); |
| 46 | + const implicitPath = resolved.slice(endMatchPos); |
| 47 | + |
| 48 | + return { outputPath, implicitPath }; |
| 49 | +} |
| 50 | + |
| 51 | +function getPackagePaths(moduleName: string, suppliedExt: string, subModule: string) { |
| 52 | + const { 1: suppliedPackageName, 2: suppliedPackagePath } = pkgRegex.exec(moduleName)!; |
| 53 | + |
| 54 | + const packagePathNoExt = fixupPartialPath(suppliedPackagePath, suppliedExt); |
| 55 | + |
| 56 | + if (!subModule) return { outputPath: packagePathNoExt }; |
| 57 | + |
| 58 | + const subModuleNoExt = fixupPartialPath(subModule, path.extname(subModule)); |
| 59 | + |
| 60 | + return { |
| 61 | + ...getPaths(packagePathNoExt, subModuleNoExt), |
| 62 | + suppliedPackageName, |
| 63 | + suppliedPackagePath |
| 64 | + }; |
| 65 | +} |
| 66 | + |
| 67 | +function getModulePaths( |
| 68 | + moduleName: string, |
| 69 | + suppliedExt: string, |
| 70 | + resolvedFileName: string, |
| 71 | + resolvedExt: string, |
| 72 | + tsPathMatch: string | Pattern | undefined |
| 73 | +) { |
| 74 | + // In this case, the file ending is a fixed path, so no further information needs to be determined |
| 75 | + if (typeof tsPathMatch === "string" || tsPathMatch?.suffix) return { outputPath: void 0 }; |
| 76 | + |
| 77 | + const resolvedFileNameNoExt = fixupPartialPath(resolvedFileName, resolvedExt); |
| 78 | + const modulePathNoExt = tsPathMatch?.prefix |
| 79 | + ? fixupPartialPath(removePrefix(moduleName, tsPathMatch?.prefix), suppliedExt) |
| 80 | + : fixupPath(moduleName, suppliedExt); |
| 81 | + |
| 82 | + return getPaths(modulePathNoExt, resolvedFileNameNoExt); |
| 83 | +} |
| 84 | + |
| 85 | +function getTsPathMatch(match: string | Pattern): string { |
| 86 | + return typeof match === "string" ? match : [match.prefix, match.suffix].join("*"); |
| 87 | +} |
| 88 | + |
| 89 | +// endregion |
| 90 | + |
| 91 | +/* ****************************************************************************************************************** */ |
| 92 | +// region: Utils |
| 93 | +/* ****************************************************************************************************************** */ |
| 94 | + |
| 95 | +export function joinPaths(...paths: (string | undefined)[]): string { |
| 96 | + return normalizePath(path.join('', ...paths.filter(p => typeof p === 'string') as string[])); |
| 97 | +} |
| 98 | + |
| 99 | +/** |
| 100 | + * Remove leading or trailing slashes |
| 101 | + * @p path to fix |
| 102 | + * @extName extname to remove |
| 103 | + */ |
| 104 | +export function fixupPartialPath(p: string, extName?: string): string { |
| 105 | + p = p.replace(/^[/\\]*(.+?)[/\\]*$/g, "$1"); |
| 106 | + if (extName && p.slice(-extName.length) === extName) p = p.slice(0, p.length - extName.length); |
| 107 | + return p; |
| 108 | +} |
| 109 | + |
| 110 | +/** |
| 111 | + * Remove trailing slashes |
| 112 | + * @p path to fix |
| 113 | + * @extName extname to remove |
| 114 | + */ |
| 115 | +export function fixupPath(p: string, extName?: string): string { |
| 116 | + p = p.replace(/^(.+?)[/\\]*$/g, "$1"); |
| 117 | + if (extName && p.slice(-extName.length) === extName) p = p.slice(0, p.length - extName.length); |
| 118 | + return p; |
| 119 | +} |
| 120 | + |
| 121 | +/** @internal — Uses internal TS type */ |
| 122 | +export function getOutputPathDetail( |
| 123 | + moduleName: string, |
| 124 | + resolvedModule: ResolvedModuleFull, |
| 125 | + pathMatch: string | Pattern | undefined |
| 126 | +): OutputPathDetail { |
| 127 | + moduleName = fixupPath(moduleName); |
| 128 | + let suppliedExtName = path.extname(moduleName); |
| 129 | + const suppliedBaseName = path.basename(moduleName); |
| 130 | + let suppliedBaseNameNoExt = path.basename(moduleName, suppliedExtName); |
| 131 | + |
| 132 | + const resolvedFileName = resolvedModule.originalPath ?? resolvedModule.resolvedFileName; |
| 133 | + const resolvedExtName = path.extname(resolvedFileName); |
| 134 | + const resolvedFileNameNoExt = removeSuffix(resolvedFileName, resolvedExtName); |
| 135 | + const resolvedBaseName = path.basename(resolvedFileName); |
| 136 | + const resolvedBaseNameNoExt = path.basename(resolvedFileName, suppliedExtName); |
| 137 | + |
| 138 | + const tsPathMatch = pathMatch && getTsPathMatch(pathMatch); |
| 139 | + |
| 140 | + const { isExternalLibraryImport, packageId } = resolvedModule; |
| 141 | + const packageName = packageId?.name; |
| 142 | + const packageFileName = packageId && fixupPartialPath(packageId.subModuleName); |
| 143 | + const packageExtName = packageFileName && path.extname(packageFileName); |
| 144 | + const packageFileNameNoExt = packageFileName && removeSuffix(packageFileName, resolvedExtName); |
| 145 | + const packageBaseName = packageFileName && path.basename(packageFileName); |
| 146 | + const packageBaseNameNoExt = packageFileName && path.basename(packageFileName, packageExtName); |
| 147 | + |
| 148 | + const effectiveResolvedFileName = packageFileNameNoExt || resolvedFileNameNoExt; |
| 149 | + const effectiveResolvedBaseName = packageBaseName || resolvedBaseName; |
| 150 | + const effectiveResolvedBaseNameNoExt = packageBaseNameNoExt || resolvedBaseNameNoExt; |
| 151 | + const effectiveResolvedExtName = packageExtName || resolvedExtName; |
| 152 | + |
| 153 | + // Detect and fix invalid extname due to implicit ext (ie. `file.accounting.ts` could decide `accounting` is the extension) |
| 154 | + if (suppliedExtName && effectiveResolvedBaseNameNoExt && suppliedBaseName && effectiveResolvedBaseNameNoExt === suppliedBaseName) { |
| 155 | + suppliedBaseNameNoExt = suppliedBaseName; |
| 156 | + suppliedExtName = ""; |
| 157 | + } |
| 158 | + |
| 159 | + const isImplicitExtension = !suppliedExtName; |
| 160 | + |
| 161 | + const pathDetail = resolvedModule.isExternalLibraryImport |
| 162 | + ? getPackagePaths(moduleName, suppliedExtName, packageId!.subModuleName) |
| 163 | + : getModulePaths(moduleName, suppliedExtName, resolvedFileName, resolvedExtName, tsPathMatch); |
| 164 | + |
| 165 | + return { |
| 166 | + isImplicitExtension, |
| 167 | + isExternalLibraryImport: !!isExternalLibraryImport, |
| 168 | + resolvedExt: effectiveResolvedExtName, |
| 169 | + suppliedExt: suppliedExtName, |
| 170 | + resolvedPath: effectiveResolvedFileName, |
| 171 | + tsPathMatch, |
| 172 | + packageName, |
| 173 | + packagePath: packageFileName, |
| 174 | + ...pathDetail, |
| 175 | + }; |
| 176 | +} |
| 177 | + |
| 178 | +// endregion |
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