Add yard to generate Ruby code documentation

.gitignore

@@ -23,6 +23,8 @@ public/*
 config/projects/simple.rb
 .markdownlintrc
 .DS_Store
+.yardoc
+yard
 
 # These are created during a package build. We do not want to commit them
 .yarn-cache

.yardopts

@@ -0,0 +1 @@
+yardoc -o yard --no-private --protected lib/**/*.rb files/gitlab-cookbooks/**/*.rb files/gitlab-ctl-commands/**/*.rb files/gitlab-ctl-commands-ee/**/*.rb - README.md CONTRIBUTING.md LICENSE CHANGELOG.md

Gemfile

@@ -34,6 +34,7 @@ gem 'http'
 gem 'aws-sdk-ec2'
 gem 'aws-sdk-marketplacecatalog'
 gem 'gitlab'
+gem 'yard'
 
 group :packagecloud, optional: true do
   gem 'package_cloud'

Gemfile.lock

@@ -424,6 +424,7 @@ GEM
       winrm (~> 2.0)
     wisper (2.0.1)
     wmi-lite (1.0.5)
+    yard (0.9.26)
     zeitwerk (2.4.2)
     zhexdump (0.0.2)
 
@@ -454,6 +455,7 @@ DEPENDENCIES
   rspec-parameterized
   rspec_junit_formatter
   thor (= 0.18.1)
+  yard
 
 BUNDLED WITH
    2.2.15

gitlab-ci-config/gitlab-com.yml

@@ -4,6 +4,16 @@
 #############
 # Templates #
 #############
+.com-docs-except-triggers: &com-docs-except-triggers
+  except:
+    refs:
+      - /./@gitlab/omnibus-gitlab
+      - triggers
+      - /^deps/
+      - /./@gitlab-org/build/omnibus-gitlab-mirror
+    variables:
+      - $DEPS_PIPELINE || $CACHE_UPDATE || $DEPENDENCY_SCANNING
+      - $CI_COMMIT_REF_NAME =~ /^[0-9]+-[0-9]+-auto-deploy-[0-9]+$/
 
 .com-except-triggers: &com-except-triggers
   except:
@@ -250,15 +260,7 @@ docs-lint markdown:
     - vale --minAlertLevel error doc
     # Lint Markdown
     - markdownlint --config .markdownlint.yml 'doc/**/*.md'
-  except:
-    refs:
-      - /./@gitlab/omnibus-gitlab
-      - triggers
-      - /^deps/
-      - /./@gitlab-org/build/omnibus-gitlab-mirror
-    variables:
-      - $DEPS_PIPELINE || $CACHE_UPDATE || $DEPENDENCY_SCANNING
-      - $CI_COMMIT_REF_NAME =~ /^[0-9]+-[0-9]+-auto-deploy-[0-9]+$/
+  <<: *com-docs-except-triggers
 
 # Perform link checks on published HTML files
 docs-lint links:
@@ -277,15 +279,26 @@ docs-lint links:
     - bundle exec nanoc check internal_links
     # Check the internal anchor links
     - bundle exec nanoc check internal_anchors
-  except:
-    refs:
-      - /./@gitlab/omnibus-gitlab
-      - triggers
-      - /^deps/
-      - /./@gitlab-org/build/omnibus-gitlab-mirror
-    variables:
-      - $DEPS_PIPELINE || $CACHE_UPDATE || $DEPENDENCY_SCANNING
-      - $CI_COMMIT_REF_NAME =~ /^[0-9]+-[0-9]+-auto-deploy-[0-9]+$/
+  <<: *com-docs-except-triggers
+
+yard:
+  extends: .gems-cache
+  image: "${RUBY_IMAGE}"
+  stage: check
+  needs: []
+  before_script:
+    # These jobs will not be run on dev, so we set ALTERNATIVE_SOURCES to true
+    # so tests run fine on forks
+    - export ALTERNATIVE_SOURCES="true";
+    - *install-gems
+  script:
+    - bundle exec yardoc
+  <<: *com-docs-except-triggers
+  artifacts:
+    expire_in: 1 week
+    paths:
+      - yard/*
+
 
 # Trigger a docs build in gitlab-docs
 # Useful to preview the docs changes live
@@ -604,12 +617,15 @@ validate_packer_changes:
 ##############################
 
 pages:
-  image: "${PUBLIC_BUILDER_IMAGE_REGISTRY}/ubuntu_16.04:${BUILDER_IMAGE_REVISION}"
+  image: "${PUBLIC_BUILDER_IMAGE_REGISTRY}/ubuntu_20.04:${BUILDER_IMAGE_REVISION}"
   stage: prepare
+  needs:
+    - yard
   script:
     - bundle exec rake license:generate_pages
     - mv ${LICENSE_S3_BUCKET} public
     - cp support/webpages/* public
+    - cp yard/* public
   artifacts:
     paths:
       - public