feat(init): reify on init new workspace

Adds a minimalistic reify step that updates the installed tree after
initializing a new workspace.

Moved the shared update logic from `lib/commands/version.js` to a
`lib/workspaces/update-workspaces.js` module that is reused between
both `npm version` and `npm init`.

Relates to: npm/rfcs#556
Relates to: npm#4588

docs/content/commands/npm-init.md

@@ -253,6 +253,17 @@ This value is not exported to the environment for child processes.
 <!-- automatically generated, do not edit manually -->
 <!-- see lib/utils/config/definitions.js -->
 
+#### `workspaces-update`
+
+* Default: true
+* Type: Boolean
+
+If set to true, the npm cli will run an update after operations that may
+possibly change the workspaces installed to the `node_modules` folder.
+
+<!-- automatically generated, do not edit manually -->
+<!-- see lib/utils/config/definitions.js -->
+
 #### `include-workspace-root`
 
 * Default: false

lib/commands/init.js

@@ -8,13 +8,21 @@ const libexec = require('libnpmexec')
 const mapWorkspaces = require('@npmcli/map-workspaces')
 const PackageJson = require('@npmcli/package-json')
 const log = require('../utils/log-shim.js')
+const updateWorkspaces = require('../workspaces/update-workspaces.js')
 
 const getLocationMsg = require('../exec/get-workspace-location-msg.js')
 const BaseCommand = require('../base-command.js')
 
 class Init extends BaseCommand {
   static description = 'Create a package.json file'
-  static params = ['yes', 'force', 'workspace', 'workspaces', 'include-workspace-root']
+  static params = [
+    'yes',
+    'force',
+    'workspace',
+    'workspaces',
+    'workspaces-update',
+    'include-workspace-root',
+  ]
   static name = 'init'
   static usage = [
     '[--force|-f|--yes|-y|--scope]',
@@ -46,11 +54,13 @@ class Init extends BaseCommand {
     const pkg = await rpj(resolve(this.npm.localPrefix, 'package.json'))
     const wPath = filterArg => resolve(this.npm.localPrefix, filterArg)
 
+    const workspacesPaths = []
     // npm-exec style, runs in the context of each workspace filter
     if (args.length) {
       for (const filterArg of filters) {
         const path = wPath(filterArg)
         await mkdirp(path)
+        workspacesPaths.push(path)
         await this.execCreate({ args, path })
         await this.setWorkspace({ pkg, workspacePath: path })
       }
@@ -61,9 +71,13 @@ class Init extends BaseCommand {
     for (const filterArg of filters) {
       const path = wPath(filterArg)
       await mkdirp(path)
+      workspacesPaths.push(path)
       await this.template(path)
       await this.setWorkspace({ pkg, workspacePath: path })
     }
+
+    // reify packages once all workspaces have been initialized
+    await this.update(workspacesPaths)
   }
 
   async execCreate ({ args, path }) {
@@ -196,6 +210,31 @@ class Init extends BaseCommand {
 
     await pkgJson.save()
   }
+
+  async update (workspacesPaths) {
+    // translate workspaces paths into an array containing workspaces names
+    const workspaces = []
+    for (const path of workspacesPaths) {
+      const pkgPath = resolve(path, 'package.json')
+      const { name } = await rpj(pkgPath)
+        .catch(() => ({}))
+      workspaces.push(name)
+    }
+
+    const {
+      config,
+      flatOptions,
+      localPrefix
+    } = this.npm
+
+    await updateWorkspaces({
+      config,
+      flatOptions,
+      localPrefix,
+      npm: this.npm,
+      workspaces,
+    })
+  }
 }
 
 module.exports = Init

lib/commands/version.js

@@ -3,9 +3,7 @@ const { resolve } = require('path')
 const { promisify } = require('util')
 const readFile = promisify(require('fs').readFile)
 
-const Arborist = require('@npmcli/arborist')
-const reifyFinish = require('../utils/reify-finish.js')
-
+const updateWorkspaces = require('../workspaces/update-workspaces.js')
 const BaseCommand = require('../base-command.js')
 
 class Version extends BaseCommand {
@@ -137,32 +135,20 @@ class Version extends BaseCommand {
     return this.list(results)
   }
 
-  async update (args) {
-    if (!this.npm.flatOptions.workspacesUpdate || !args.length) {
-      return
-    }
-
-    // default behavior is to not save by default in order to avoid
-    // race condition problems when publishing multiple workspaces
-    // that have dependencies on one another, it might still be useful
-    // in some cases, which then need to set --save
-    const save = this.npm.config.isDefault('save')
-      ? false
-      : this.npm.config.get('save')
-
-    // runs a minimalistic reify update, targetting only the workspaces
-    // that had version updates and skipping fund/audit/save
-    const opts = {
-      ...this.npm.flatOptions,
-      audit: false,
-      fund: false,
-      path: this.npm.localPrefix,
-      save,
-    }
-    const arb = new Arborist(opts)
-
-    await arb.reify({ ...opts, update: args })
-    await reifyFinish(this.npm, arb)
+  async update (workspaces) {
+    const {
+      config,
+      flatOptions,
+      localPrefix
+    } = this.npm
+
+    await updateWorkspaces({
+      config,
+      flatOptions,
+      localPrefix,
+      npm: this.npm,
+      workspaces,
+    })
   }
 }
 

lib/workspaces/update-workspaces.js

@@ -0,0 +1,40 @@
+'use strict'
+
+const Arborist = require('@npmcli/arborist')
+const reifyFinish = require('../utils/reify-finish.js')
+
+async function updateWorkspaces ({
+  config,
+  flatOptions,
+  localPrefix,
+  npm,
+  workspaces
+}) {
+  if (!flatOptions.workspacesUpdate || !workspaces.length) {
+    return
+  }
+
+  // default behavior is to not save by default in order to avoid
+  // race condition problems when publishing multiple workspaces
+  // that have dependencies on one another, it might still be useful
+  // in some cases, which then need to set --save
+  const save = config.isDefault('save')
+    ? false
+    : config.get('save')
+
+  // runs a minimalistic reify update, targetting only the workspaces
+  // that had version updates and skipping fund/audit/save
+  const opts = {
+    ...flatOptions,
+    audit: false,
+    fund: false,
+    path: localPrefix,
+    save,
+  }
+  const arb = new Arborist(opts)
+
+  await arb.reify({ ...opts, update: workspaces })
+  await reifyFinish(npm, arb)
+}
+
+module.exports = updateWorkspaces

tap-snapshots/test/lib/commands/init.js.test.cjs

@@ -10,26 +10,53 @@ Array []
 `
 
 exports[`test/lib/commands/init.js TAP workspaces no args > should print helper info 1`] = `
+Array []
+`
+
+exports[`test/lib/commands/init.js TAP workspaces no args, existing folder > should print helper info 1`] = `
+Array []
+`
+
+exports[`test/lib/commands/init.js TAP workspaces post workspace-init reify > should print helper info 1`] = `
 Array [
   Array [
     String(
-      This utility will walk you through creating a package.json file.
-      It only covers the most common items, and tries to guess sensible defaults.
-      
-      See \`npm help init\` for definitive documentation on these fields
-      and exactly what they do.
-      
-      Use \`npm install <pkg>\` afterwards to install a package and
-      save it as a dependency in the package.json file.
       
-      Press ^C at any time to quit.
+      added 1 package in 100ms
     ),
   ],
 ]
 `
 
-exports[`test/lib/commands/init.js TAP workspaces no args, existing folder > should print helper info 1`] = `
-Array []
+exports[`test/lib/commands/init.js TAP workspaces post workspace-init reify > should reify tree on init ws complete 1`] = `
+{
+  "name": "top-level",
+  "lockfileVersion": 2,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "top-level",
+      "workspaces": [
+        "a"
+      ]
+    },
+    "a": {
+      "version": "1.0.0",
+      "license": "ISC",
+      "devDependencies": {}
+    },
+    "node_modules/a": {
+      "resolved": "a",
+      "link": true
+    }
+  },
+  "dependencies": {
+    "a": {
+      "version": "file:a"
+    }
+  }
+}
+
 `
 
 exports[`test/lib/commands/init.js TAP workspaces with arg but missing workspace folder > should print helper info 1`] = `

tap-snapshots/test/lib/load-all-commands.js.test.cjs

@@ -396,7 +396,7 @@ npm init [<@scope>/]<name> (same as \`npx [<@scope>/]create-<name>\`)
 Options:
 [-y|--yes] [-f|--force]
 [-w|--workspace <workspace-name> [-w|--workspace <workspace-name> ...]]
-[-ws|--workspaces] [--include-workspace-root]
+[-ws|--workspaces] [--no-workspaces-update] [--include-workspace-root]
 
 aliases: create, innit
 

tap-snapshots/test/lib/utils/npm-usage.js.test.cjs

@@ -486,7 +486,7 @@ All commands:
                     Options:
                     [-y|--yes] [-f|--force]
                     [-w|--workspace <workspace-name> [-w|--workspace <workspace-name> ...]]
-                    [-ws|--workspaces] [--include-workspace-root]
+                    [-ws|--workspaces] [--no-workspaces-update] [--include-workspace-root]
                     
                     aliases: create, innit
                     

test/lib/commands/init.js

@@ -288,6 +288,7 @@ t.test('workspaces', t => {
     t.teardown(() => {
       npm._mockOutputs.length = 0
     })
+    npm._mockOutputs.length = 0
     npm.localPrefix = t.testdir({
       'package.json': JSON.stringify({
         name: 'top-level',
@@ -306,6 +307,39 @@ t.test('workspaces', t => {
     t.matchSnapshot(npm._mockOutputs, 'should print helper info')
   })
 
+  t.test('post workspace-init reify', async t => {
+    const _consolelog = console.log
+    console.log = () => null
+    t.teardown(() => {
+      console.log = _consolelog
+      npm._mockOutputs.length = 0
+      delete npm.flatOptions.workspacesUpdate
+    })
+    npm.started = Date.now()
+    npm._mockOutputs.length = 0
+    npm.flatOptions.workspacesUpdate = true
+    npm.localPrefix = t.testdir({
+      'package.json': JSON.stringify({
+        name: 'top-level',
+      }),
+    })
+
+    const Init = t.mock('../../../lib/commands/init.js', {
+      ...mocks,
+      'init-package-json': (dir, initFile, config, cb) => {
+        t.equal(dir, resolve(npm.localPrefix, 'a'), 'should use the ws path')
+        return require('init-package-json')(dir, initFile, config, cb)
+      },
+    })
+    const init = new Init(npm)
+    await init.execWorkspaces([], ['a'])
+    const output = npm._mockOutputs.map(arr => arr.map(i => i.replace(/[0-9]*ms$/, '100ms')))
+    t.matchSnapshot(output, 'should print helper info')
+    const lockFilePath = resolve(npm.localPrefix, 'package-lock.json')
+    const lockFile = fs.readFileSync(lockFilePath, { encoding: 'utf8' })
+    t.matchSnapshot(lockFile, 'should reify tree on init ws complete')
+  })
+
   t.test('no args, existing folder', async t => {
     t.teardown(() => {
       npm._mockOutputs.length = 0