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import babelTraverse from '@babel/traverse';
import {File as BabelNodes} from '@babel/types';
import * as babelParser from '@babel/parser';
import {ParseableFile} from './parsable_file';
import {PackageJSON} from './package_json';
const defaults = {readonly: true};
export class BabelFile extends ParseableFile<BabelNodes> {
constructor(
public props: ConstructorParameters<typeof ParseableFile>[0] & {
plugins?: babelParser.ParserPlugin[];
// modifyDependency?: (dep: string) => string;
pkg?: PackageJSON;
} = defaults
) {
super({...props, ...defaults});
this.props = {...props, ...defaults};
}
get pkg() {
return this.props.pkg ?? new PackageJSON({cwd: this.cwd});
}
/** @see https://stackoverflow.com/a/54003496/340688 */
static getBuiltins() {
try {
// eslint-disable-next-line @typescript-eslint/no-var-requires
const result = require('module');
// eslint-disable-next-line node/no-unsupported-features/node-builtins
return result.builtinModules;
} catch (e) {
/* istanbul ignore next */
// prettier-ignore
return [
'assert', 'buffer', 'child_process',
'cluster', 'console', 'constants',
'crypto', 'dgram', 'dns',
'domain', 'events', 'fs',
'http', 'https', 'module',
'net', 'os', 'path',
'process', 'punycode', 'querystring',
'readline', 'repl', 'stream',
'string_decoder', 'sys', 'timers',
'tls', 'tty', 'url',
'util', 'vm', 'zlib'
];
}
}
static builtins = BabelFile.getBuiltins();
static isNativeImport(pkg: string) {
return BabelFile.builtins.includes(pkg);
}
static isLocalImport(pkg: string) {
return Boolean(pkg.match('^/|^./|^../'));
}
static isNodePackageImport(pkg: string) {
return !BabelFile.isNativeImport(pkg) && !BabelFile.isLocalImport(pkg);
}
get packageImports() {
return (async () => {
return (await this.imports).filter(BabelFile.isNodePackageImport);
})();
}
get localImports() {
return (async () => {
return (await this.imports).filter(BabelFile.isLocalImport);
})();
}
get nativeImports() {
return (async () => {
return (await this.imports).filter(BabelFile.isNativeImport);
})();
}
get packageRecursiveImports() {
return (async () => {
return (await this.recursiveImports).filter(BabelFile.isNodePackageImport);
})();
}
get localRecursiveImports() {
return (async () => {
return (await this.recursiveImports).filter(BabelFile.isLocalImport);
})();
}
get nativeRecursiveImports() {
return (async () => {
return (await this.recursiveImports).filter(BabelFile.isNativeImport);
})();
}
get plugins(): babelParser.ParserPlugin[] {
Iif (this.props.plugins && this.props.plugins.length) return this.props.plugins;
return ['typescript', 'classProperties', 'classPrivateProperties'];
}
// get modifyDependency() {
// return this.props?.modifyDependency;
// }
private cacheParsedContent?: BabelNodes;
parse(content: string): BabelNodes {
if (this.cacheParsedContent) return this.cacheParsedContent;
this.cacheParsedContent = babelParser.parse(content, {
sourceType: 'module',
plugins: this.plugins,
});
return this.cacheParsedContent;
}
private cacheImports?: string[];
get imports(): Promise<string[]> {
return (async () => {
if (this.cacheImports) return this.cacheImports;
let imports: string[] = [];
const content = await this.parsedContent;
babelTraverse(content, {
CallExpression: astPath => {
/* istanbul ignore next */
if ('name' in astPath.node?.callee) {
if (astPath.node?.callee?.name === 'require') {
const arg = astPath.node.arguments[0];
/* istanbul ignore next */
if ('value' in arg && typeof arg.value === 'string') {
imports.push(arg.value);
// if (this.modifyDependency) arg.value = this.modifyDependency(arg.value);
}
}
}
},
ImportDeclaration: astPath => {
imports.push(astPath.node.source.value);
// if (this.modifyDependency) {
// astPath.node.source.value = this.modifyDependency(astPath.node.source.value);
// }
},
});
imports = imports.map(i => {
if (BabelFile.isLocalImport(i)) {
return path.join(this.dirname, `${i}${this.extname}`);
}
return i;
});
this.cacheImports = imports;
return this.cacheImports;
})();
}
static uniqueString(a: string[]) {
function onlyUnique(value: string, index: number, self: string[]) {
return self.indexOf(value) === index;
}
const unique = a.filter(onlyUnique); // returns ['a', 1, 2, '1']
return unique;
}
private cacheSiblingFiles: {[key: string]: BabelFile} = {};
private cacheRecursiveImports: string[] = [];
private fileCacheCheck(path: string) {
return typeof this.cacheSiblingFiles[path] !== 'undefined';
}
private fileCacheAdd(file: BabelFile) {
this.cacheSiblingFiles[file.path] = file;
}
private async recursiveImportAdd(file: BabelFile) {
const imports = await file.imports;
this.cacheRecursiveImports = BabelFile.uniqueString([...this.cacheRecursiveImports, ...imports]);
}
get recursiveDependencies(): Promise<[string[], {[key: string]: BabelFile}]> {
return (async (): Promise<[string[], {[key: string]: BabelFile}]> => {
if (this.cacheRecursiveImports.length !== 0) {
return [this.cacheRecursiveImports, this.cacheSiblingFiles];
}
const recursive = async (babelFile: BabelFile) => {
await this.fileCacheAdd(babelFile);
await this.recursiveImportAdd(babelFile);
return (await babelFile.localImports).reduce((promise, path) => {
return promise.then(async () => {
const isCached = this.fileCacheCheck(path);
if (isCached) return;
const file = new BabelFile({path});
this.fileCacheAdd(file);
await recursive(file);
});
}, Promise.resolve());
};
await recursive(this);
return [this.cacheRecursiveImports, this.cacheSiblingFiles];
})();
}
get recursiveImports() {
return (async () => {
const [imports] = await this.recursiveDependencies;
return imports;
})();
}
get recursiveSiblings() {
return (async () => {
const [, siblings] = await this.recursiveDependencies;
return Object.values(siblings);
})();
}
/** Given a package json file, will pluck all npm dependencies */
get dependencies(): Promise<{[k: string]: string}> {
return (async () => {
const imports = await this.packageRecursiveImports;
const nativeImports = await this.nativeRecursiveImports;
const allDependencies = await this.pkg.dependencies;
const dependencies = {};
imports.forEach(i => {
const version = allDependencies[i];
if (!version) throw new Error(`Dependency "${i}" is not found in package.json.`);
Object.assign(dependencies, {[i]: version});
});
nativeImports.forEach(i => {
const version = allDependencies[i];
if (version) Object.assign(dependencies, {[i]: version});
});
return dependencies;
})();
}
}
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