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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 npm = require('./npm.js')
const usageUtil = require('./utils/usage.js')
const reifyFinish = require('./utils/reify-finish.js')
const completion = async (opts) => {
const dir = npm.globalDir
const files = await readdir(dir)
return files.filter(f => !/^[._-]/.test(f))
}
const usage = usageUtil(
'link',
'npm link (in package dir)' +
'\nnpm link [<@scope>/]<pkg>[@<version>]'
)
const cmd = (args, cb) => link(args).then(() => cb()).catch(cb)
const link = async args => {
if (npm.config.get('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) !== npm.prefix)
return args.length
? linkInstall(args)
: linkPkg()
}
// Returns a list of items that can't be fulfilled by
// things found in the current arborist inventory
const missingArgsFromTree = (tree, args) => {
if (tree.isLink)
return 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 &&
!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
}
const linkInstall = async args => {
// load current packages from the global space,
// and then add symlinks installs locally
const globalTop = resolve(npm.globalDir, '..')
const globalOpts = {
...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 = 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(npm.config.find('save') !== 'default' || npm.flatOptions.saveType)
// create a new arborist instance for the local prefix and
// reify all the pending names as symlinks there
const localArb = new Arborist({
...npm.flatOptions,
path: npm.prefix,
save,
})
await localArb.reify({
...npm.flatOptions,
path: npm.prefix,
add: names.map(l => `file:${resolve(globalTop, 'node_modules', l)}`),
save,
})
await reifyFinish(localArb)
}
const linkPkg = async () => {
const globalTop = resolve(npm.globalDir, '..')
const arb = new Arborist({
...npm.flatOptions,
path: globalTop,
global: true,
})
await arb.reify({ add: [`file:${npm.prefix}`] })
await reifyFinish(arb)
}
module.exports = Object.assign(cmd, { completion, usage })
|
