feat(verify): add option to opt out of docker login

adds option `login` the by pass the login step all together.

Semver: minor

README.md

@@ -50,6 +50,7 @@ omitted, it is assumed the docker daemon is already authenticated with the targe
 | docker.project        | _Optional_. The project or repository name to publish the image to                                                                          | For scoped packages, the scope will be used, otherwise `null`
 | docker.dockerfile     | _Optional_. The path, relative to `$PWD` to a Docker file to build the target image with                                                    | `Dockerfile`
 | docker.context        | _Optional_. A path, relative to `$PWD` to use as the build context A                                                                        | `.`
+| docker.login          | _Optional_. Set to false it by pass docker login if the docker daemon is already authorized                                                 | `true`
 
 ## Usage
 

lib/build-config.js

@@ -15,6 +15,7 @@ async function buildConfig(build_id, config, context) {
   , tags = ['latest', '{major}-latest', '{version}']
   , args = {}
   , registry = null
+  , login = true
   , image
   } = (object.get(config, 'docker') || {})
 
@@ -50,6 +51,7 @@ async function buildConfig(build_id, config, context) {
     }
   , name: image || name
   , build: build_id
+  , login: login
   , context: config.context || '.'
   }
 }

lib/verify.js

@@ -52,6 +52,11 @@ async function verify(opts, context) {
     return false
   }
 
+  if (opts.login === false) {
+    debug('docker login === false. Skipping login')
+    return false
+  }
+
   let set = 0
   if (USERNAME) set += 1
   if (PASSWORD) set += 1

test/integration/verify.js

@@ -98,6 +98,27 @@ test('steps::verify', async (t) => {
     tt.resolves(verify(config, context))
   })
 
+  t.test('docker no login', async (tt) => {
+    const context = {
+      env: {
+        ...process.env
+      , DOCKER_REGISTRY_USER: 'iamweasel'
+      }
+    , cwd: process.cwd()
+    , logger: {
+        success: sinon.stub()
+      , info: sinon.stub()
+      }
+    }
+    const config = await buildConfig(build_id, {
+      docker: {
+        registry: DOCKER_REGISTRY_HOST
+      , login: false
+      }
+    }, context)
+    tt.resolves(verify(config, context))
+  })
+
   t.test('docker password, no username', async (tt) => {
     const context = {
       env: {