ls: show installed but unmet peer deps (#145)

PR-URL: #145
Fixes: https://npm.community/t/4770

Credit: @larsgw
Reviewed-By: @aeschright

lib/ls.js

@@ -305,7 +305,7 @@ function filterFound (root, args) {
     if (!markDeps) continue
     Object.keys(markDeps).forEach(function (depName) {
       var dep = markDeps[depName]
-      if (dep.peerMissing) return
+      if (dep.peerMissing && !dep._from) return
       dep._parent = markPkg
       for (var ii = 0; ii < args.length; ii++) {
         var argName = args[ii][0]

test/tap/ls-peer.js

@@ -0,0 +1,123 @@
+'use strict'
+const path = require('path')
+const test = require('tap').test
+const Tacks = require('tacks')
+const File = Tacks.File
+const Dir = Tacks.Dir
+const common = require('../common-tap.js')
+
+const basedir = path.join(__dirname, path.basename(__filename, '.js'))
+const testdir = path.join(basedir, 'testdir')
+const cachedir = path.join(basedir, 'cache')
+const globaldir = path.join(basedir, 'global')
+const tmpdir = path.join(basedir, 'tmp')
+
+const conf = {
+  cwd: testdir,
+  env: common.newEnv().extend({
+    npm_config_cache: cachedir,
+    npm_config_tmp: tmpdir,
+    npm_config_prefix: globaldir,
+    npm_config_registry: common.registry,
+    npm_config_loglevel: 'warn'
+  })
+}
+
+const fixture = new Tacks(Dir({
+  cache: Dir(),
+  global: Dir(),
+  tmp: Dir(),
+  testdir: Dir({
+    'package.json': File({
+      name: 'fixture',
+      version: '1.0.0',
+      dependencies: {
+        dep: 'file:dep-1.0.0.tgz',
+        'peer-dep': 'file:peer-dep-2.0.0.tgz'
+      }
+    }),
+    // Source dir
+    // dep: Dir({
+    //   'package.json': File({
+    //     name: 'dep',
+    //     version: '1.0.0',
+    //     peerDependencies: {
+    //       'peer-dep': 'file:peer-dep-1.0.0.tgz'
+    //     }
+    //   })
+    // }),
+    'dep-1.0.0.tgz': File(Buffer.from(
+      '1f8b0800000000000003ed8f3d0ec2300c853be71451661a1cd166e8cc45' +
+      'a2d654e1278d92c200eadd491a60ea462584946fb1f5fc9e655bd59e548f' +
+      '5b9b2a3ffac1142b0300b2aae8921e1152d062574b10424a08bed0d4d10f' +
+      '6b1fb2c4d58fca8553bedd937ea19ffa273c08a5cca80bb286b20e2ddb44' +
+      'e186ceebc1444d70e090548be8f668d174685a8d3e8c63fc3529633a040e' +
+      'fa8ccd5b28e7381ffb3b0bce894ce4d70f6732994c66e60975aec5690008' +
+      '0000',
+      'hex'
+    )),
+    // Source dir
+    // 'peer-dep': Dir({
+    //   'package.json': File({
+    //     name: 'peer-dep',
+    //     version: '2.0.0'
+    //   })
+    // }),
+    'peer-dep-1.0.0.tgz': File(Buffer.from(
+      '1f8b08000000000000032b484cce4e4c4fd52f80d07a59c5f9790c540606' +
+      '06066626260ad8c4c1c0d45c81c1d8d4ccc0d0d0cccc00a80ec830353500' +
+      'd2d4760836505a5c925804740aa5e640bca200a78708a8e6525050ca4bcc' +
+      '4d55b252502a484d2dd24d492d50d2018996a5161567e6e781240cf50cf4' +
+      '0c94b86ab906dab9a360148c8251300aa80400c1c67f6300080000',
+      'hex'
+    )),
+    'peer-dep-2.0.0.tgz': File(Buffer.from(
+      '1f8b08000000000000032b484cce4e4c4fd52f80d07a59c5f9790c540606' +
+      '06066626260ad8c4c1c0d45c81c1d8d4ccc0d0d0cccc00a80ec830353500' +
+      'd2d4760836505a5c925804740aa5e640bca200a78708a8e6525050ca4bcc' +
+      '4d55b252502a484d2dd24d492d50d2018996a5161567e6e781248cf40cf4' +
+      '0c94b86ab906dab9a360148c8251300aa80400cb30060800080000',
+      'hex'
+    ))
+  })
+}))
+
+function setup () {
+  cleanup()
+  fixture.create(basedir)
+}
+
+function cleanup () {
+  fixture.remove(basedir)
+}
+
+test('setup', t => {
+  setup()
+  return common.fakeRegistry.listen().then(() => common.npm(['install'], conf))
+})
+
+test('list warns about unmet peer dependency', t => {
+  return common.npm(['ls'], conf).then(([code, stdout, stderr]) => {
+    t.is(code, 1, 'command ran not ok')
+    t.comment(stdout.trim())
+    t.comment(stderr.trim())
+    t.match(stdout, 'UNMET PEER DEPENDENCY peer-dep@2.0.0')
+    t.match(stderr, 'npm ERR! peer dep missing: peer-dep@file:peer-dep-1.0.0.tgz, required by dep@1.0.0')
+  })
+})
+
+test('list shows installed but unmet peer dependency', t => {
+  return common.npm(['ls', 'peer-dep'], conf).then(([code, stdout, stderr]) => {
+    t.is(code, 1, 'command ran not ok')
+    t.comment(stdout.trim())
+    t.comment(stderr.trim())
+    t.match(stdout, 'UNMET PEER DEPENDENCY peer-dep@2.0.0')
+    t.match(stderr, 'npm ERR! peer dep missing: peer-dep@file:peer-dep-1.0.0.tgz, required by dep@1.0.0')
+  })
+})
+
+test('cleanup', t => {
+  common.fakeRegistry.close()
+  cleanup()
+  t.done()
+})