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const fs = require('fs') const util = require('util') const readdir = util.promisify(fs.readdir) const { resolve } = require('path') const Arborist = require('@npmcli/arborist') const npa = require('npm-package-arg') const rpj = require('read-package-json-fast') const semver = require('semver') const reifyFinish = require('../utils/reify-finish.js') const ArboristWorkspaceCmd = require('../arborist-cmd.js') class Link extends ArboristWorkspaceCmd { static description = 'Symlink a package folder' static name = 'link' static usage = [ '[<package-spec>]', ] static params = [ 'save', 'save-exact', 'global', 'global-style', 'legacy-bundling', 'strict-peer-deps', 'package-lock', 'omit', 'ignore-scripts', 'audit', 'bin-links', 'fund', 'dry-run', ...super.params, ] async completion (opts) { const dir = this.npm.globalDir const files = await readdir(dir) return files.filter(f => !/^[._-]/.test(f)) } async exec (args) { if (this.npm.global) { throw Object.assign( new Error( 'link should never be --global.\n' + 'Please re-run this command with --local' ), { code: 'ELINKGLOBAL' } ) } // link with no args: symlink the folder to the global location // link with package arg: symlink the global to the local args = args.filter(a => resolve(a) !== this.npm.prefix) return args.length ? this.linkInstall(args) : this.linkPkg() } async linkInstall (args) { // load current packages from the global space, // and then add symlinks installs locally const globalTop = resolve(this.npm.globalDir, '..') const globalOpts = { ...this.npm.flatOptions, path: globalTop, global: true, prune: false, } const globalArb = new Arborist(globalOpts) // get only current top-level packages from the global space const globals = await globalArb.loadActual({ filter: (node, kid) => !node.isRoot || args.some(a => npa(a).name === kid), }) // any extra arg that is missing from the current // global space should be reified there first const missing = this.missingArgsFromTree(globals, args) if (missing.length) { await globalArb.reify({ ...globalOpts, add: missing, }) } // get a list of module names that should be linked in the local prefix const names = [] for (const a of args) { const arg = npa(a) names.push( arg.type === 'directory' ? (await rpj(resolve(arg.fetchSpec, 'package.json'))).name : arg.name ) } // npm link should not save=true by default unless you're // using any of --save-dev or other types const save = Boolean( this.npm.config.find('save') !== 'default' || this.npm.config.get('save-optional') || this.npm.config.get('save-peer') || this.npm.config.get('save-dev') || this.npm.config.get('save-prod') ) // create a new arborist instance for the local prefix and // reify all the pending names as symlinks there const localArb = new Arborist({ ...this.npm.flatOptions, prune: false, path: this.npm.prefix, save, }) await localArb.reify({ ...this.npm.flatOptions, prune: false, path: this.npm.prefix, add: names.map(l => `file:${resolve(globalTop, 'node_modules', l).replace(/#/g, '%23')}`), save, workspaces: this.workspaceNames, }) await reifyFinish(this.npm, localArb) } async linkPkg () { const wsp = this.workspacePaths const paths = wsp && wsp.length ? wsp : [this.npm.prefix] const add = paths.map(path => `file:${path.replace(/#/g, '%23')}`) const globalTop = resolve(this.npm.globalDir, '..') const arb = new Arborist({ ...this.npm.flatOptions, path: globalTop, global: true, }) await arb.reify({ add, }) await reifyFinish(this.npm, arb) } // Returns a list of items that can't be fulfilled by // things found in the current arborist inventory missingArgsFromTree (tree, args) { if (tree.isLink) { return this.missingArgsFromTree(tree.target, args) } const foundNodes = [] const missing = args.filter(a => { const arg = npa(a) const nodes = tree.children.values() const argFound = [...nodes].every(node => { // TODO: write tests for unmatching version specs, this is hard to test // atm but should be simple once we have a mocked registry again if (arg.name !== node.name /* istanbul ignore next */ || ( arg.version && /* istanbul ignore next */ !semver.satisfies(node.version, arg.version) )) { foundNodes.push(node) return true } }) return argFound }) // remote nodes from the loaded tree in order // to avoid dropping them later when reifying for (const node of foundNodes) { node.parent = null } return missing } } module.exports = Link
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