/
package.ts
68 lines (56 loc) 路 1.72 KB
/
package.ts
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import path from "path";
import type { Handler } from "gensync";
import { makeStaticFileCache } from "./utils";
import type { ConfigFile, FilePackageData } from "./types";
import ConfigError from "../../errors/config-error";
const PACKAGE_FILENAME = "package.json";
const readConfigPackage = makeStaticFileCache(
(filepath, content): ConfigFile => {
let options;
try {
options = JSON.parse(content) as unknown;
} catch (err) {
throw new ConfigError(
`Error while parsing JSON - ${err.message}`,
filepath,
);
}
if (!options) throw new Error(`${filepath}: No config detected`);
if (typeof options !== "object") {
throw new ConfigError(
`Config returned typeof ${typeof options}`,
filepath,
);
}
if (Array.isArray(options)) {
throw new ConfigError(`Expected config object but found array`, filepath);
}
return {
filepath,
dirname: path.dirname(filepath),
options,
};
},
);
/**
* Find metadata about the package that this file is inside of. Resolution
* of Babel's config requires general package information to decide when to
* search for .babelrc files
*/
export function* findPackageData(filepath: string): Handler<FilePackageData> {
let pkg = null;
const directories = [];
let isPackage = true;
let dirname = path.dirname(filepath);
while (!pkg && path.basename(dirname) !== "node_modules") {
directories.push(dirname);
pkg = yield* readConfigPackage(path.join(dirname, PACKAGE_FILENAME));
const nextLoc = path.dirname(dirname);
if (dirname === nextLoc) {
isPackage = false;
break;
}
dirname = nextLoc;
}
return { filepath, directories, pkg, isPackage };
}