pnpm
Version:
A fast implementation of npm install
52 lines • 2.11 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments)).next());
});
};
const path = require('path');
const fs = require('mz/fs');
/**
* Check if a module exists (eg, `node_modules/node-pre-gyp`). This is the case when
* it's part of bundleDependencies.
*
* This check is also responsible for stopping `pnpm i lodash` from doing anything when
* 'node_modules/lodash' already exists.
*
* @example
* spec = { name: 'lodash', spec: '^3.0.2' }
* isAvailable(spec, 'path/to/node_modules')
*/
function isAvailable(spec, modules) {
return __awaiter(this, void 0, void 0, function* () {
const name = spec && spec.name;
if (!name)
return false;
const packageJsonPath = path.join(modules, name, 'package.json');
try {
const stat = yield fs.lstat(path.join(modules, name));
if (stat.isDirectory()) {
return true;
}
const content = yield fs.readFile(packageJsonPath);
const pkgJson = JSON.parse(content);
return verify(spec, pkgJson);
}
catch (err) {
if (err.code !== 'ENOENT')
throw err;
return false;
}
});
}
Object.defineProperty(exports, "__esModule", { value: true });
exports.default = isAvailable;
function verify(spec, packageJson) {
return packageJson.name === spec.name &&
((spec.type !== 'range' && spec.type !== 'version' && spec.type !== 'tag') ||
packageJson.version === spec.spec);
}
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