change the deploy model to latest and stable

.gitlab-ci.yml

@@ -18,10 +18,33 @@ test:
 
 pages:
   stage: deploy
+  only:
+    - develop
+    - master
   script:
-  - bundle exec jekyll build -d public
+    # build the master version into stable
+    - git fetch --tags
+    - latestTag=$(git describe --tags `git rev-list --tags --max-count=1`)
+    - git checkout $latestTag
+    - bundle exec jekyll build -d public
+    - mkdir stable
+    - mv public/* stable/.
+
+    # build the develop version into latest
+    - git checkout -f develop
+    - git fetch origin develop
+    - git reset --hard origin/develop
+    - bundle exec jekyll build -d public
+    - mkdir latest
+    - mv public/* latest/.
+
+    # deploy the stable and latest directories
+    - mv stable public/.
+    - mv latest public/.
+
+    # auto redirect file
+    - cp .autoRedirect public/index.html
+
   artifacts:
     paths:
-    - public
-  only:
-  - master
+      - public
\ No newline at end of file