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All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {StaticSymbol} from '@angular/compiler';\nimport {AngularCompilerOptions, ModuleMetadata} from '@angular/tsc-wrapped';\nimport * as fs from 'fs';\nimport * as path from 'path';\nimport * as ts from 'typescript';\n\nimport {CompilerHost, CompilerHostContext} from './compiler_host';\n\nconst EXT = /(\\.ts|\\.d\\.ts|\\.js|\\.jsx|\\.tsx)$/;\nconst DTS = /\\.d\\.ts$/;\n\n/**\n * This version of the AotCompilerHost expects that the program will be compiled\n * and executed with a \"path mapped\" directory structure, where generated files\n * are in a parallel tree with the sources, and imported using a `./` relative\n * import. This requires using TS `rootDirs` option and also teaching the module\n * loader what to do.\n */\nexport class PathMappedCompilerHost extends CompilerHost {\n constructor(program: ts.Program, options: AngularCompilerOptions, context: CompilerHostContext) {\n super(program, options, context);\n }\n\n getCanonicalFileName(fileName: string): string {\n if (!fileName) return fileName;\n // NB: the rootDirs should have been sorted longest-first\n for (const dir of this.options.rootDirs || []) {\n if (fileName.indexOf(dir) === 0) {\n fileName = fileName.substring(dir.length);\n }\n }\n return fileName;\n }\n\n moduleNameToFileName(m: string, containingFile: string): string|null {\n if (!containingFile || !containingFile.length) {\n if (m.indexOf('.') === 0) {\n throw new Error('Resolution of relative paths requires a containing file.');\n }\n // Any containing file gives the same result for absolute imports\n containingFile = this.getCanonicalFileName(path.join(this.basePath, 'index.ts'));\n }\n for (const root of this.options.rootDirs || ['']) {\n const rootedContainingFile = path.join(root, containingFile);\n const resolved =\n ts.resolveModuleName(m, rootedContainingFile, this.options, this.context).resolvedModule;\n if (resolved) {\n if (this.options.traceResolution) {\n console.error('resolve', m, containingFile, '=>', resolved.resolvedFileName);\n }\n return this.getCanonicalFileName(resolved.resolvedFileName);\n }\n }\n return null;\n }\n\n /**\n * We want a moduleId that will appear in import statements in the generated code.\n * These need to be in a form that system.js can load, so absolute file paths don't work.\n * Relativize the paths by checking candidate prefixes of the absolute path, to see if\n * they are resolvable by the moduleResolution strategy from the CompilerHost.\n */\n fileNameToModuleName(importedFile: string, containingFile: string): string {\n if (this.options.traceResolution) {\n console.error(\n 'getImportPath from containingFile', containingFile, 'to importedFile', importedFile);\n }\n\n // If a file does not yet exist (because we compile it later), we still need to\n // assume it exists so that the `resolve` method works!\n if (!this.context.fileExists(importedFile)) {\n if (this.options.rootDirs && this.options.rootDirs.length > 0) {\n this.context.assumeFileExists(path.join(this.options.rootDirs[0], importedFile));\n } else {\n this.context.assumeFileExists(importedFile);\n }\n }\n\n const resolvable = (candidate: string) => {\n const resolved = this.moduleNameToFileName(candidate, importedFile);\n return resolved && resolved.replace(EXT, '') === importedFile.replace(EXT, '');\n };\n\n const importModuleName = importedFile.replace(EXT, '');\n const parts = importModuleName.split(path.sep).filter(p => !!p);\n let foundRelativeImport: string = undefined !;\n for (let index = parts.length - 1; index >= 0; index--) {\n let candidate = parts.slice(index, parts.length).join(path.sep);\n if (resolvable(candidate)) {\n return candidate;\n }\n candidate = '.' + path.sep + candidate;\n if (resolvable(candidate)) {\n foundRelativeImport = candidate;\n }\n }\n\n if (foundRelativeImport) return foundRelativeImport;\n\n // Try a relative import\n const candidate = path.relative(path.dirname(containingFile), importModuleName);\n if (resolvable(candidate)) {\n return candidate;\n }\n\n throw new Error(\n `Unable to find any resolvable import for ${importedFile} relative to ${containingFile}`);\n }\n\n getMetadataFor(filePath: string): ModuleMetadata[] {\n for (const root of this.options.rootDirs || []) {\n const rootedPath = path.join(root, filePath);\n if (!this.context.fileExists(rootedPath)) {\n // If the file doesn't exists then we cannot return metadata for the file.\n // This will occur if the user refernced a declared module for which no file\n // exists for the module (i.e. jQuery or angularjs).\n continue;\n }\n if (DTS.test(rootedPath)) {\n const metadataPath = rootedPath.replace(DTS, '.metadata.json');\n if (this.context.fileExists(metadataPath)) {\n return this.readMetadata(metadataPath, rootedPath);\n }\n } else {\n const sf = this.getSourceFile(rootedPath);\n sf.fileName = sf.fileName;\n const metadata = this.metadataCollector.getMetadata(sf);\n return metadata ? [metadata] : [];\n }\n }\n return null !;\n }\n}\n"]}
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