chore: run linkinator on merges to master (#243)

.kokoro/continuous/linux.cfg

@@ -3,7 +3,7 @@
 build_file: "google-auth-library-ruby/.kokoro/trampoline.sh"
 
 # Configure the docker image for kokoro-trampoline.
-# Dockerfile is maintained at https://github.com/googleapis/google-cloud-ruby/tree/master/.kokoro/docker/ruby-multi
+# Dockerfile is maintained at https://github.com/googleapis/google-cloud-ruby/tree/master/.kokoro/docker/multi
 env_vars: {
     key: "TRAMPOLINE_IMAGE"
     value: "gcr.io/cloud-devrel-kokoro-resources/yoshi-ruby/ruby-multi"

.kokoro/continuous/post.cfg

@@ -0,0 +1,30 @@
+# Format: //devtools/kokoro/config/proto/build.proto
+
+build_file: "google-auth-library-ruby/.kokoro/trampoline.sh"
+
+# Configure the docker image for kokoro-trampoline.
+# Dockerfile is maintained at https://github.com/googleapis/google-cloud-ruby/tree/master/.kokoro/docker/multi-node
+env_vars: {
+    key: "TRAMPOLINE_IMAGE"
+    value: "gcr.io/cloud-devrel-kokoro-resources/yoshi-ruby/multi-node"
+}
+
+env_vars: {
+    key: "TRAMPOLINE_BUILD_FILE"
+    value: "github/google-auth-library-ruby/.kokoro/build.sh"
+}
+
+env_vars: {
+    key: "TRAMPOLINE_SCRIPT"
+    value: "trampoline_v1.py"
+}
+
+env_vars: {
+    key: "OS"
+    value: "linux"
+}
+
+env_vars: {
+    key: "JOB_TYPE"
+    value: "post"
+}

README.md

@@ -178,7 +178,7 @@ access and refresh tokens. Two storage implementations are included:
 *   Google::Auth::Stores::RedisTokenStore
 
 Custom storage implementations can also be used. See
-[token_store.rb](lib/googleauth/token_store.rb) for additional details.
+[token_store.rb](https://googleapis.dev/ruby/googleauth/latest/Google/Auth/TokenStore.html) for additional details.
 
 ## Supported Ruby Versions
 
@@ -206,7 +206,6 @@ hesitate to
 [ask questions](http://stackoverflow.com/questions/tagged/google-auth-library-ruby)
 about the client or APIs on [StackOverflow](http://stackoverflow.com).
 
-[google-apis-ruby-client]: (https://github.com/google/google-api-ruby-client)
+[application default credentials]: https://developers.google.com/accounts/docs/application-default-credentials
-[application default credentials]: (https://developers.google.com/accounts/docs/application-default-credentials)
+[contributing]: https://github.com/googleapis/google-auth-library-ruby/tree/master/.github/CONTRIBUTING.md
-[contributing]: https://github.com/google/google-auth-library-ruby/tree/master/CONTRIBUTING.md
+[copying]: https://github.com/googleapis/google-auth-library-ruby/tree/master/COPYING
-[copying]: https://github.com/google/google-auth-library-ruby/tree/master/COPYING

Rakefile

@@ -71,6 +71,14 @@ namespace :kokoro do
     Rake::Task["ci"].invoke
   end
 
+  task :post do
+    require_relative "rakelib/link_checker.rb"
+
+    link_checker = LinkChecker.new
+    link_checker.run
+    exit link_checker.exit_status
+  end
+
   task :nightly do
     Rake::Task["ci"].invoke
   end

lib/googleauth/application_default.rb

@@ -47,7 +47,7 @@ module Google
     #
     # Use this to obtain the Application Default Credentials for accessing
     # Google APIs.  Application Default Credentials are described in detail
-    # at http://goo.gl/IUuyuX.
+    # at https://cloud.google.com/docs/authentication/production.
     #
     # If supplied, scope is used to create the credentials instance, when it can
     # be applied.  E.g, on google compute engine and for user credentials the

lib/googleauth/service_account.rb

@@ -45,7 +45,7 @@ module Google
     # from credentials from a json key file downloaded from the developer
     # console (via 'Generate new Json Key').
     #
-    # cf [Application Default Credentials](http://goo.gl/mkAHpZ)
+    # cf [Application Default Credentials](https://cloud.google.com/docs/authentication/production)
     class ServiceAccountCredentials < Signet::OAuth2::Client
       TOKEN_CRED_URI = "https://www.googleapis.com/oauth2/v4/token".freeze
       extend CredentialsLoader
@@ -123,7 +123,7 @@ module Google
     # console (via 'Generate new Json Key').  It is not part of any OAuth2
     # flow, rather it creates a JWT and sends that as a credential.
     #
-    # cf [Application Default Credentials](http://goo.gl/mkAHpZ)
+    # cf [Application Default Credentials](https://cloud.google.com/docs/authentication/production)
     class ServiceAccountJwtHeaderCredentials
       JWT_AUD_URI_KEY = :jwt_aud_uri
       AUTH_METADATA_KEY = Signet::OAuth2::AUTH_METADATA_KEY

lib/googleauth/user_refresh.rb

@@ -44,7 +44,7 @@ module Google
     # 'gcloud auth login' saves a file with these contents in well known
     # location
     #
-    # cf [Application Default Credentials](http://goo.gl/mkAHpZ)
+    # cf [Application Default Credentials](https://cloud.google.com/docs/authentication/production)
     class UserRefreshCredentials < Signet::OAuth2::Client
       TOKEN_CRED_URI = "https://oauth2.googleapis.com/token".freeze
       AUTHORIZATION_URI = "https://accounts.google.com/o/oauth2/auth".freeze

rakelib/link_checker.rb

@@ -0,0 +1,64 @@
+require "open3"
+
+class LinkChecker
+  def initialize
+    @failed = false
+  end
+
+  def run
+    job_info
+    git_commit = ENV.fetch "KOKORO_GITHUB_COMMIT", "master"
+
+    markdown_files = Dir.glob "**/*.md"
+    broken_markdown_links = check_links markdown_files,
+                                        "https://github.com/googleapis/google-auth-library-ruby/tree/#{git_commit}",
+                                        " --skip '^(?!(\\Wruby.*google|.*google.*\\Wruby|.*cloud\\.google\\.com))'"
+
+    broken_devsite_links = check_links ["googleauth"],
+                                       "https://googleapis.dev/ruby",
+                                       "/latest/ --recurse --skip https:.*github.*"
+
+    puts_broken_links broken_markdown_links
+    puts_broken_links broken_devsite_links
+  end
+
+  def check_links location_list, base, tail
+    broken_links = Hash.new { |h, k| h[k] = [] }
+    location_list.each do |location|
+      out, err, st = Open3.capture3 "npx linkinator #{base}/#{location}#{tail}"
+      puts out
+      unless st.to_i.zero?
+        @failed = true
+        puts err
+      end
+      checked_links = out.split "\n"
+      checked_links.select! { |link| link =~ /\[\d+\]/ && !link.include?("[200]") }
+      unless checked_links.empty?
+        @failed = true
+        broken_links[location] += checked_links
+      end
+    end
+    broken_links
+  end
+
+  def puts_broken_links link_hash
+    link_hash.each do |location, links|
+      puts "#{location} contains the following broken links:"
+      links.each { |link| puts "  #{link}" }
+      puts ""
+    end
+  end
+
+  def job_info
+    line_length = "Using Ruby - #{RUBY_VERSION}".length + 8
+    puts ""
+    puts "#" * line_length
+    puts "### Using Ruby - #{RUBY_VERSION} ###"
+    puts "#" * line_length
+    puts ""
+  end
+
+  def exit_status
+    @failed ? 1 : 0
+  end
+end