/
config.ts
142 lines (127 loc) · 3.95 KB
/
config.ts
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import { Chalk } from 'chalk';
import * as path from 'path';
import * as typescript from 'typescript';
import * as webpack from 'webpack';
import { LoaderOptions, WebpackError } from './interfaces';
import * as logger from './logger';
import { formatErrors } from './utils';
interface ConfigFile {
config?: any;
error?: typescript.Diagnostic;
}
export function getConfigFile(
compiler: typeof typescript,
colors: Chalk,
loader: webpack.loader.LoaderContext,
loaderOptions: LoaderOptions,
compilerCompatible: boolean,
log: logger.Logger,
compilerDetailsLogMessage: string
) {
const configFilePath = findConfigFile(
compiler,
path.dirname(loader.resourcePath),
loaderOptions.configFile
);
let configFileError: WebpackError | undefined;
let configFile: ConfigFile;
if (configFilePath !== undefined) {
if (compilerCompatible) {
log.logInfo(`${compilerDetailsLogMessage} and ${configFilePath}`);
} else {
log.logInfo(`ts-loader: Using config file at ${configFilePath}`);
}
configFile = compiler.readConfigFile(configFilePath, compiler.sys.readFile);
if (configFile.error !== undefined) {
configFileError = formatErrors(
[configFile.error],
loaderOptions,
colors,
compiler,
{ file: configFilePath },
loader.context
)[0];
}
} else {
if (compilerCompatible) {
log.logInfo(compilerDetailsLogMessage);
}
configFile = {
config: {
compilerOptions: {},
files: []
}
};
}
if (configFileError === undefined) {
configFile.config.compilerOptions = Object.assign(
{},
configFile.config.compilerOptions,
loaderOptions.compilerOptions
);
}
return {
configFilePath,
configFile,
configFileError
};
}
/**
* Find a tsconfig file by name or by path.
* By name, the tsconfig.json is found using the same method as `tsc`, starting in the current
* directory and continuing up the parent directory chain.
* By path, the file will be found by resolving the given path relative to the requesting entry file.
*
* @param compiler The TypeScript compiler instance
* @param requestDirPath The directory in which the entry point requesting the tsconfig.json lies
* @param configFile The tsconfig file name to look for or a path to that file
* @return The absolute path to the tsconfig file, undefined if none was found.
*/
function findConfigFile(
compiler: typeof typescript,
requestDirPath: string,
configFile: string
): string | undefined {
// If `configFile` is an absolute path, return it right away
if (path.isAbsolute(configFile)) {
return compiler.sys.fileExists(configFile) ? configFile : undefined;
}
// If `configFile` is a relative path, resolve it.
// We define a relative path as: starts with
// one or two dots + a common directory delimiter
if (configFile.match(/^\.\.?(\/|\\)/) !== null) {
const resolvedPath = path.resolve(requestDirPath, configFile);
return compiler.sys.fileExists(resolvedPath) ? resolvedPath : undefined;
// If `configFile` is a file name, find it in the directory tree
} else {
while (true) {
const fileName = path.join(requestDirPath, configFile);
if (compiler.sys.fileExists(fileName)) {
return fileName;
}
const parentPath = path.dirname(requestDirPath);
if (parentPath === requestDirPath) {
break;
}
requestDirPath = parentPath;
}
return undefined;
}
}
export function getConfigParseResult(
compiler: typeof typescript,
configFile: ConfigFile,
basePath: string,
configFilePath: string | undefined
) {
const configParseResult = compiler.parseJsonConfigFileContent(
configFile.config,
compiler.sys,
basePath
);
// set internal options.configFilePath flag on options to denote that we read this from a file
configParseResult.options = Object.assign({}, configParseResult.options, {
configFilePath
});
return configParseResult;
}