Provide initial template for Gitlab Pipelines (acquia#1733)

* Adding the initial gitlab template.

* Implementing the blt command which copies the template to the project root.

* Updating the CI template file with extended steps based on existing commands on other CI platforms.

* Updating typo and adding warning regarding the experimental nature of the plugin.

Author: snufkin

scripts/gitlab/gitlab-ci.yml

@@ -0,0 +1,38 @@
+stages:
+  - validate
+  - build
+  - test
+  - deploy
+
+variables:
+  APP_NAME: Project
+
+before_script:
+  - echo "hello world"
+
+validate:
+  stage: validate
+  script:
+    - blt validate:all
+
+build:
+  stage: build
+  script:
+    - composer validate --no-check-all --ansi
+    - composer install --ansi
+    - blt setup:build
+
+test:
+  stage: test
+  script:
+    - blt tests --define tests.run-server=true --yes -v
+
+production:
+  stage: deploy
+  script:
+    - echo "Launching application"
+  environment:
+    name: production
+    url: http://$APP_NAME.example.com
+  only:
+    - master

src/Robo/Commands/Ci/CiCommand.php

@@ -68,4 +68,22 @@ public function proboInit() {
     $this->say("<info>A pre-configured .probo.yml file was copied to your repository root.</info>");
   }
 
+  /**
+   * Initializes default GitLab Pipelines configuration for this project.
+   *
+   * @command ci:gitlab:init
+   */
+  public function gitlabInit() {
+    $result = $this->taskFilesystemStack()
+      ->copy($this->getConfigValue('blt.root') . '/scripts/gitlab/gitlab-ci.yml', $this->getConfigValue('repo.root') . '/.gitlab-ci.yml', TRUE)
+      ->stopOnFail()
+      ->setVerbosityThreshold(VerbosityThresholdInterface::VERBOSITY_VERBOSE)
+      ->run();
+    if (!$result->wasSuccessful()) {
+      throw new BltException("Could not initialize the GitLab Pipelines configuration.");
+    }
+    $this->say("<info>A pre-configured .gitlab-ci.yml file was copied to your repository root.</info>");
+    $this->logger->warning("GitLab support is experimental and may not support all BLT features.");
+  }
+
 }