feat(cli): expose --latest-of-major-only option

Author: wesleytodd

bin/nv

@@ -18,10 +18,16 @@ require('yargs')
         defaultDescription: 'pretty print json spaces, default 2 (--no-pretty-json for new line delimted json)',
         description: 'Pretty print json'
       })
+      yargs.option('latest-of-major-only', {
+        type: 'boolean',
+        default: false,
+        description: 'Only show latest version in each semver major range'
+      })
     },
     handler: (argv) => {
       nv(argv.versions, {
-        mirror: argv.mirror
+        mirror: argv.mirror,
+        latestOfMajorOnly: argv.latestOfMajorOnly
       })
         .then(result => {
           result.forEach(r => {

test/cli.js

@@ -27,4 +27,14 @@ suite('nv cli', () => {
       assert(r.version.startsWith('8.'))
     })
   })
+  test('should only contain the latest of each major', () => {
+    const result = execFileSync(nv, ['ls', '16.x || 18.x', '--no-pretty-json', '--latest-of-major-only'], { cwd: cwd })
+      .toString().trim().split('\n')
+      .map((line) => JSON.parse(line))
+
+    assert(Array.isArray(result))
+    assert.strictEqual(result.length, 2)
+    assert(result[0].version.startsWith('16.'))
+    assert(result[1].version.startsWith('18.'))
+  })
 })