51 lines
1.5 KiB
TypeScript
51 lines
1.5 KiB
TypeScript
import { dirname } from 'path';
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import * as ts from 'typescript';
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import defaultResolver from 'jest-resolve/build/default_resolver';
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interface ResolveOptions {
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rootDir: string;
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basedir: string;
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paths: string[];
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moduleDirectory: string[];
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browser: boolean;
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extensions: string[];
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}
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function getCompilerSetup(rootDir: string) {
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const tsConfigPath =
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ts.findConfigFile(rootDir, ts.sys.fileExists, 'tsconfig.spec.json') ||
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ts.findConfigFile(rootDir, ts.sys.fileExists, 'tsconfig.test.json') ||
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ts.findConfigFile(rootDir, ts.sys.fileExists, 'tsconfig.jest.json');
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if (!tsConfigPath) {
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console.error(
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`Cannot locate a tsconfig.spec.json. Please create one at ${rootDir}/tsconfig.spec.json`
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);
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}
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const readResult = ts.readConfigFile(tsConfigPath, ts.sys.readFile);
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const config = ts.parseJsonConfigFileContent(
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readResult.config,
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ts.sys,
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dirname(tsConfigPath)
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);
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const compilerOptions = config.options;
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const host = ts.createCompilerHost(compilerOptions, true);
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return { compilerOptions, host };
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}
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let compilerSetup;
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module.exports = function(path: string, options: ResolveOptions) {
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// Try to use the defaultResolver
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try {
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return defaultResolver(path, options);
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} catch (e) {
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// Fallback to using typescript
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compilerSetup = compilerSetup || getCompilerSetup(options.rootDir);
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const { compilerOptions, host } = compilerSetup;
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return ts.resolveModuleName(path, options.basedir, compilerOptions, host)
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.resolvedModule.resolvedFileName;
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}
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};
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