feat: add --install-strategy config, replace --global-style with

"shallow" style

BREAKING CHANGE: remove --global-style, --global now sets
--install-strategy=shallow

lib/commands/dedupe.js

@@ -8,7 +8,7 @@ class Dedupe extends ArboristWorkspaceCmd {
   static description = 'Reduce duplication in the package tree'
   static name = 'dedupe'
   static params = [
-    'global-style',
+    'install-strategy',
     'legacy-bundling',
     'strict-peer-deps',
     'package-lock',

lib/commands/find-dupes.js

@@ -5,7 +5,7 @@ class FindDupes extends ArboristWorkspaceCmd {
   static description = 'Find duplication in the package tree'
   static name = 'find-dupes'
   static params = [
-    'global-style',
+    'install-strategy',
     'legacy-bundling',
     'strict-peer-deps',
     'package-lock',

lib/commands/install.js

@@ -20,7 +20,7 @@ class Install extends ArboristWorkspaceCmd {
     'save',
     'save-exact',
     'global',
-    'global-style',
+    'install-strategy',
     'legacy-bundling',
     'omit',
     'strict-peer-deps',

lib/commands/link.js

@@ -22,7 +22,7 @@ class Link extends ArboristWorkspaceCmd {
     'save',
     'save-exact',
     'global',
-    'global-style',
+    'install-strategy',
     'legacy-bundling',
     'strict-peer-deps',
     'package-lock',

lib/commands/update.js

@@ -14,7 +14,7 @@ class Update extends ArboristWorkspaceCmd {
   static params = [
     'save',
     'global',
-    'global-style',
+    'install-strategy',
     'legacy-bundling',
     'omit',
     'strict-peer-deps',

lib/utils/config/definitions.js

@@ -823,20 +823,6 @@ define('global', {
   },
 })
 
-define('global-style', {
-  default: false,
-  type: Boolean,
-  description: `
-    Causes npm to install the package into your local \`node_modules\` folder
-    with the same layout it uses with the global \`node_modules\` folder.
-    Only your direct dependencies will show in \`node_modules\` and
-    everything they depend on will be flattened in their \`node_modules\`
-    folders.  This obviously will eliminate some deduping. If used with
-    \`legacy-bundling\`, \`legacy-bundling\` will be preferred.
-  `,
-  flatten,
-})
-
 // the globalconfig has its default defined outside of this module
 define('globalconfig', {
   type: path,
@@ -1076,6 +1062,21 @@ define('install-links', {
   flatten,
 })
 
+define('install-strategy', {
+  default: 'hoisted',
+  type: ['hoisted', 'nested', 'shallow'],
+  description: `
+    Sets the strategy for installing packages in node_modules.
+    hoisted (default): Install non-duplicated in top-level, and duplicated as
+      necessary within directory structure.
+    nested: (formerly --legacy-bundling) install in place, no hoisting.
+    shallow (formerly --global-style) only install direct deps at top-level.
+    linked: (coming soon) install in node_modules/.store, link in place,
+      unhoisted.
+  `,
+  flatten,
+})
+
 define('json', {
   default: false,
   type: Boolean,
@@ -1523,8 +1524,8 @@ define('prefix', {
   short: 'C',
   default: '',
   defaultDescription: `
-    In global mode, the folder where the node executable is installed. In
-    local mode, the nearest parent folder containing either a package.json
+    In global mode, the folder where the node executable is installed.
+    Otherwise, the nearest parent folder containing either a package.json
     file or a node_modules folder.
   `,
   description: `

workspaces/arborist/lib/arborist/build-ideal-tree.js

@@ -79,7 +79,7 @@ const _loadFailures = Symbol('loadFailures')
 const _pruneFailedOptional = Symbol('pruneFailedOptional')
 const _linkNodes = Symbol('linkNodes')
 const _follow = Symbol('follow')
-const _globalStyle = Symbol('globalStyle')
+const _installStrategy = Symbol('installStrategy')
 const _globalRootNode = Symbol('globalRootNode')
 const _usePackageLock = Symbol.for('usePackageLock')
 const _rpcache = Symbol.for('realpathCache')
@@ -114,7 +114,7 @@ module.exports = cls => class IdealTreeBuilder extends cls {
       follow = false,
       force = false,
       global = false,
-      globalStyle = false,
+      installStrategy = 'hoisted',
       idealTree = null,
       includeWorkspaceRoot = false,
       installLinks = false,
@@ -134,7 +134,7 @@ module.exports = cls => class IdealTreeBuilder extends cls {
 
     this[_usePackageLock] = packageLock
     this[_global] = !!global
-    this[_globalStyle] = this[_global] || globalStyle
+    this[_installStrategy] = global ? 'shallow' : installStrategy
     this[_follow] = !!follow
 
     if (this[_workspaces].length && this[_global]) {
@@ -956,7 +956,7 @@ This is a one-time fix-up, please be patient...
         strictPeerDeps: this[_strictPeerDeps],
         installLinks: this.installLinks,
         legacyPeerDeps: this.legacyPeerDeps,
-        globalStyle: this[_globalStyle],
+        installStrategy: this[_installStrategy],
       }))
 
     const promises = []

workspaces/arborist/lib/arborist/index.js

@@ -76,6 +76,7 @@ class Arborist extends Base {
       workspacesEnabled: options.workspacesEnabled !== false,
       replaceRegistryHost: options.replaceRegistryHost,
       lockfileVersion: lockfileVersion(options.lockfileVersion),
+      installStrategy: options.global ? 'shallow' : (options.installStrategy ? options.installStrategy : 'hoisted'),
     }
     this.replaceRegistryHost = this.options.replaceRegistryHost =
       (!this.options.replaceRegistryHost || this.options.replaceRegistryHost === 'npmjs') ?

workspaces/arborist/lib/place-dep.js

@@ -47,7 +47,7 @@ class PlaceDep {
       strictPeerDeps,
       installLinks,
       legacyPeerDeps,
-      globalStyle,
+      installStrategy,
     } = parent || options
     Object.assign(this, {
       preferDedupe,
@@ -58,8 +58,8 @@ class PlaceDep {
       legacyBundling,
       strictPeerDeps,
       installLinks,
+      installStrategy,
       legacyPeerDeps,
-      globalStyle,
     })
 
     this.children = []
@@ -78,10 +78,10 @@ class PlaceDep {
       edge,
       dep,
       preferDedupe,
-      globalStyle,
       legacyBundling,
       explicitRequest,
       updateNames,
+      installStrategy,
       checks,
     } = this
 
@@ -176,7 +176,7 @@ class PlaceDep {
 
       // when installing globally, or just in global style, we never place
       // deps above the first level.
-      if (globalStyle) {
+      if (installStrategy === 'shallow') {
         const rp = target.resolveParent
         if (rp && rp.isProjectRoot) {
           break

workspaces/arborist/test/arborist/build-ideal-tree.js

@@ -607,7 +607,7 @@ t.test('link dep within node_modules and outside root', t => {
 })
 
 t.test('global style', t => t.resolveMatchSnapshot(printIdeal(t.testdir(), {
-  globalStyle: true,
+  installStrategy: 'shallow',
   add: ['rimraf'],
 })))
 
@@ -1136,7 +1136,7 @@ t.test('resolve links in global mode', async t => {
 
 t.test('dont get confused if root matches duped metadep', async t => {
   const path = resolve(fixtures, 'test-root-matches-metadep')
-  const arb = new Arborist({ path, ...OPT })
+  const arb = new Arborist({ path, installStrategy: 'hoisted', ...OPT })
   const tree = await arb.buildIdealTree()
   t.matchSnapshot(printTree(tree))
 })
@@ -2154,7 +2154,7 @@ t.test('properly assign fsParent when paths have .. in them', async t => {
   }
 })
 
-t.test('update global', async t => {
+t.only('update global', async t => {
   // global root
   // ├─┬ @isaacs/testing-dev-optional-flags@1.0.0
   // │ ├── own-or@1.0.0

workspaces/arborist/test/arborist/index.js

@@ -213,7 +213,7 @@ t.test('excludeSet includes nonworkspace metadeps', async t => {
     spec: 'file:pkgs/b',
   })
 
-  const arb = new Arborist()
+  const arb = new Arborist({})
   const filter = arb.excludeWorkspacesDependencySet(tree)
 
   t.equal(filter.size, 3)
@@ -245,3 +245,11 @@ t.test('valid replaceRegistryHost values', t => {
   t.equal(new Arborist({ replaceRegistryHost: 'never' }).options.replaceRegistryHost, 'never')
   t.end()
 })
+
+t.test('valid global/installStrategy values', t => {
+  t.equal(new Arborist({ global: true }).options.installStrategy, 'shallow')
+  t.equal(new Arborist({ global: false }).options.installStrategy, 'hoisted')
+  t.equal(new Arborist({}).options.installStrategy, 'hoisted')
+  t.equal(new Arborist({ installStrategy: 'hoisted' }).options.installStrategy, 'hoisted')
+  t.end()
+})

workspaces/arborist/test/arborist/reify.js

@@ -1116,7 +1116,7 @@ t.test('global style', t => {
   const rbinPart = '.bin/rimraf' +
     (process.platform === 'win32' ? '.cmd' : '')
   const rbin = resolve(nm, rbinPart)
-  return reify(path, { add: ['rimraf@2'], globalStyle: true })
+  return reify(path, { add: ['rimraf@2'], installStrategy: 'shallow' })
     .then(() => fs.statSync(rbin))
     .then(() => t.strictSame(fs.readdirSync(nm).sort(), ['.bin', '.package-lock.json', 'rimraf']))
 })

workspaces/arborist/test/place-dep.js

@@ -46,7 +46,7 @@ t.test('placement tests', t => {
       // --legacy-peer-deps set?
       legacyPeerDeps = false,
       // installing with --global or --global-style?
-      globalStyle = false,
+      installStrategy = 'hoisted',
     } = options
 
     const node = tree.inventory.get(nodeLoc)
@@ -83,7 +83,7 @@ t.test('placement tests', t => {
         legacyBundling,
         strictPeerDeps,
         legacyPeerDeps,
-        globalStyle,
+        installStrategy,
       })
     }
 
@@ -291,7 +291,7 @@ t.test('placement tests', t => {
     }),
     dep: new Node({ pkg: { name: 'bar', version: '1.0.0' } }),
     nodeLoc: 'node_modules/foo',
-    globalStyle: true,
+    installStrategy: 'shallow',
     test: (t, tree) => {
       const foobar = tree.children.get('foo').resolve('bar')
       t.equal(foobar.location, 'node_modules/foo/node_modules/bar')
@@ -323,7 +323,7 @@ t.test('placement tests', t => {
     }),
     dep: new Node({ pkg: { name: 'baz', version: '1.0.0' } }),
     nodeLoc: 'node_modules/foo/node_modules/bar',
-    globalStyle: true,
+    installStrategy: 'shallow',
     test: (t, tree) => {
       const foobar = tree.children.get('foo').resolve('bar')
       const foobarbaz = foobar.resolve('baz')