Node.js versions support (#253)

* Add "node-releases" to dependencies

* Add Node.js versions support

* Use simple string 'node' in selected version

* Handle case without raised error with flag ignoreUnknownVersions = true

* Change test name

* Find relevant node release in a more effective way

* Fix codestyle

* Update to node-releases@1.0.0-alpha.10

* Support "maintained node version" query

* Mock Node.js query tests for 100% coverage

* Increase allowed package size

index.js

@@ -1,5 +1,9 @@
 var path = require('path')
 var e2c = require('electron-to-chromium/versions')
+var nodeReleases = require('node-releases/data/processed/envs.json')
+var nodeReleaseSchedule = require(
+  'node-releases/data/release-schedule/release-schedule.json'
+)
 
 var agents = require('caniuse-lite/dist/unpacker/agents').agents
 
@@ -668,6 +672,55 @@ var QUERIES = [
       return ['chrome ' + chrome]
     }
   },
+  {
+    regexp: /^node\s+((\d+\.?){0,2}\d+)$/i,
+    select: function (context, version) {
+      var targetNodeRelease = nodeReleases
+        .reduce(function (latestNodeRelease, nodeRelease) {
+          if (nodeRelease.name !== 'nodejs') {
+            return latestNodeRelease
+          }
+          if ((nodeRelease.version + '.').indexOf(version + '.') !== 0) {
+            return latestNodeRelease
+          }
+          if (!latestNodeRelease) {
+            return nodeRelease
+          }
+          var latestNodeReleaseSegments = latestNodeRelease.version.split('.')
+          var nodeReleaseSegments = nodeRelease.version.split('.')
+          for (var i = 0; i < latestNodeReleaseSegments.length; i++) {
+            if (latestNodeReleaseSegments[i] === nodeReleaseSegments[i]) {
+              continue
+            }
+            if (+nodeReleaseSegments[i] > +latestNodeReleaseSegments[i]) {
+              latestNodeRelease = nodeRelease
+            }
+            break
+          }
+          return latestNodeRelease
+        }, null)
+      if (targetNodeRelease) {
+        return 'node ' + targetNodeRelease.version
+      }
+      if (context.ignoreUnknownVersions) {
+        return []
+      }
+      throw new BrowserslistError('Unknown version ' + version + ' of Node.js')
+    }
+  },
+  {
+    regexp: /^maintained\s+node\s+versions$/i,
+    select: function () {
+      var maintainedNodeVersions = []
+      var dateNow = Date.now()
+      for (var version in nodeReleaseSchedule) {
+        if (dateNow < Date.parse(nodeReleaseSchedule[version].end)) {
+          maintainedNodeVersions.push('node ' + version.slice(1))
+        }
+      }
+      return maintainedNodeVersions
+    }
+  },
   {
     regexp: /^(\w+)\s+(tp|[\d.]+)$/i,
     select: function (context, name, version) {

package.json

@@ -12,7 +12,8 @@
   "repository": "browserslist/browserslist",
   "dependencies": {
     "caniuse-lite": "^1.0.30000853",
-    "electron-to-chromium": "^1.3.48"
+    "electron-to-chromium": "^1.3.48",
+    "node-releases": "^1.0.0-alpha.10"
   },
   "bin": "./cli.js",
   "devDependencies": {

test/node.test.js

@@ -0,0 +1,67 @@
+var browserslist = require('../')
+
+describe('Node.js versions', () => {
+  it('selects Node.js version', () => {
+    expect(browserslist('node 7.5.0')).toEqual(['node 7.5.0'])
+  })
+
+  it('supports case insensitive Node.js name', () => {
+    expect(browserslist('Node 7.5.0')).toEqual(['node 7.5.0'])
+  })
+
+  it('throws on unknown Node.js version', () => {
+    expect(() => {
+      browserslist('node 7.5.7')
+    }).toThrowError(/Unknown version/)
+  })
+
+  it('return empty array on unknown Node.js version with special flag', () => {
+    expect(browserslist('node 7.5.7', {
+      ignoreUnknownVersions: true
+    })).toEqual([])
+  })
+
+  it('supports selection of Node.js version by major.minor query', () => {
+    expect(browserslist('node 5.1')).toEqual(['node 5.1.0'])
+  })
+
+  it('supports selection of Node.js version by major version only', () => {
+    expect(browserslist('node 5')).toEqual(['node 5.12.0'])
+  })
+
+  it('returns latest version from unordered list', () => {
+    jest.resetModules()
+    jest.doMock('node-releases/data/processed/envs.json', () => {
+      return [
+        {
+          'name': 'nodejs',
+          'version': '5.10.0',
+          'date': '2016-04-01',
+          'lts': false
+        },
+        {
+          'name': 'nodejs',
+          'version': '5.12.0',
+          'date': '2016-06-23',
+          'lts': false
+        },
+        {
+          'name': 'nodejs',
+          'version': '5.11.0',
+          'date': '2016-04-21',
+          'lts': false
+        }
+      ]
+    })
+    var browserslistWithMocks = require('../')
+    expect(browserslistWithMocks('node 5')).toEqual(['node 5.12.0'])
+  })
+
+  it('selects maintained Node.js versions', () => {
+    expect(Array.isArray(browserslist('maintained node versions'))).toBe(true)
+  })
+
+  it('supports case insensitive query for maintained Node.js versions', () => {
+    expect(Array.isArray(browserslist('maintained Node versions'))).toBe(true)
+  })
+})

yarn.lock

@@ -3927,6 +3927,12 @@ node-pre-gyp@^0.10.0:
     semver "^5.3.0"
     tar "^4"
 
+node-releases@^1.0.0-alpha.10:
+  version "1.0.0-alpha.10"
+  resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.0.0-alpha.10.tgz#61c8d5f9b5b2e05d84eba941d05b6f5202f68a2a"
+  dependencies:
+    semver "^5.3.0"
+
 nopt@^4.0.1:
   version "4.0.1"
   resolved "https://registry.yarnpkg.com/nopt/-/nopt-4.0.1.tgz#d0d4685afd5415193c8c7505602d0d17cd64474d"