Removed forced options, cleaned up link checker args. (#4726)

Signed-off-by: dblock <[email protected]>

Gemfile

@@ -39,3 +39,4 @@ gem "webrick", "~> 1.7"
 # Link checker
 gem "typhoeus"
 gem "ruby-link-checker"
+gem "ruby-enum"

_plugins/link-checker.rb

@@ -12,19 +12,28 @@
 require 'pathname'
 require 'typhoeus'
 require 'ruby-link-checker'
+require 'ruby-enum'
 
 ##
 # This singleton checks links during build to warn or fail upon finding dead links.
 #
 # `JEKYLL_LINK_CHECKER`, set on the environment, will cause verification of external links
-# Valid values: internal, forced, all.
+# Valid values: internal, all.
 # Usage: `JEKYLL_LINK_CHECKER=internal bundle exec jekyll build --trace`
 #
 # `JEKYLL_FATAL_LINK_CHECKER`, set on the environment, is the same as `JEKYLL_LINK_CHECKER`
 # except that it fails the build if there are broken links. it takes the same valid values
 # Usage: `JEKYLL_FATAL_LINK_CHECKER=internal bundle exec jekyll build --trace`
 
 module Jekyll::LinkChecker
+  class CheckTypes
+    include Ruby::Enum
+
+    define :INTERNAL, 'internal'
+    define :EXTERNAL, 'external'
+    define :ALL, 'all'
+  end
+
   ##
   # The collection that will get stores as the output
 
@@ -44,7 +53,6 @@ module Jekyll::LinkChecker
   # Pattern to check for external URLs
 
   @external_matcher = %r{^https?://}.freeze
-  @forced_external_matcher = %r{^https?://.*(?=opensearch\.org/)}.freeze
 
   ##
   # List of domains to ignore
@@ -55,7 +63,7 @@ module Jekyll::LinkChecker
     'playground.opensearch.org', # inifite redirect, https://github.com/opensearch-project/dashboards-anywhere/issues/172
     'crates.io', # 404s on bots
     'www.cloudflare.com', # 403s on bots
-    'example.issue.link', # a fake example link from the template
+    'example.issue.link' # a fake example link from the template
   ]
 
   ##
@@ -68,11 +76,9 @@ module Jekyll::LinkChecker
 
   ##
   # Build flags driven by environment variables
-  @@LINK_CHECKER_STATES = %w[internal forced all]
-  @check_links                # Enables the link checker
-  @check_forced_external      # Enables checking internal links marked as external e.g. /docs
+  @check_internal_links       # Enables checking internal links
   @check_external_links       # Enables checking external links
-  @should_build_fatally       # indicates the need to fail the build for dead links
+  @fail_on_error              # Indicates the need to fail the build for dead links
 
   ##
   # Defines the priority of the plugin
@@ -81,6 +87,22 @@ def self.priority
     10
   end
 
+  def self.check_links?
+    check_external_links? || check_internal_links?
+  end
+
+  def self.check_external_links?
+    !!@check_external_links
+  end
+
+  def self.check_internal_links?
+    !!@check_internal_links
+  end
+
+  def self.fail_on_error?
+    !!@fail_on_error
+  end
+
   ##
   # Initializes the singleton by recording the site
   def self.init(site)
@@ -89,15 +111,15 @@ def self.init(site)
     @failures = []
 
     begin
-      @should_build_fatally = true if ENV.key?('JEKYLL_FATAL_LINK_CHECKER')
-      check_flag = @should_build_fatally ? ENV['JEKYLL_FATAL_LINK_CHECKER'] : ENV['JEKYLL_LINK_CHECKER']
+      @fail_on_error = true if ENV.key?('JEKYLL_FATAL_LINK_CHECKER')
+      check_flag = fail_on_error? ? ENV['JEKYLL_FATAL_LINK_CHECKER'] : ENV['JEKYLL_LINK_CHECKER']
 
       unless check_flag
         return Jekyll.logger.info 'LinkChecker:', 'disabled. Enable with JEKYLL_LINK_CHECKER on the environment'
       end
 
-      unless @@LINK_CHECKER_STATES.include?(check_flag)
-        Jekyll.logger.info "LinkChecker: [Notice] Could not initialize, Valid values for #{@should_build_fatally ? 'JEKYLL_FATAL_LINK_CHECKER' : 'JEKYLL_LINK_CHECKER'} are #{@@LINK_CHECKER_STATES}"
+      unless CheckTypes.values.include?(check_flag)
+        Jekyll.logger.info "LinkChecker: [Notice] Could not initialize, Valid values for #{fail_on_error? ? 'JEKYLL_FATAL_LINK_CHECKER' : 'JEKYLL_LINK_CHECKER'} are #{CheckTypes.values}"
         return
       end
 
@@ -112,15 +134,8 @@ def self.init(site)
         @failures << "#{result}, linked to in #{result.options[:location]}"
       end
 
-      @check_links = true if @@LINK_CHECKER_STATES.include?(check_flag)
-      @check_forced_external = true if @@LINK_CHECKER_STATES[1..3].include?(check_flag)
-      @check_external_links = true if @@LINK_CHECKER_STATES[2..3].include?(check_flag)
-
-      msg = {
-        'internal' => 'internal links',
-        'forced' => 'internal and forced external links',
-        'all' => 'all links'
-      }
+      @check_external_links = [CheckTypes::EXTERNAL, CheckTypes::ALL].include?(check_flag)
+      @check_internal_links = [CheckTypes::INTERNAL, CheckTypes::ALL].include?(check_flag)
 
       # Process a Page as soon as its content is ready
       Jekyll::Hooks.register :pages, :post_convert, priority: priority do |page|
@@ -137,10 +152,10 @@ def self.init(site)
         verify(site)
       end
 
-      if @check_links
-        Jekyll.logger.info "LinkChecker: [Notice] Initialized successfully and will check #{msg[check_flag]}"
+      if check_links?
+        Jekyll.logger.info "LinkChecker: [Notice] Initialized successfully and will check #{check_flag} links"
       end
-      Jekyll.logger.info 'LinkChecker: [Notice] The build will fail if a dead link is found' if @should_build_fatally
+      Jekyll.logger.info 'LinkChecker: [Notice] The build will fail if a dead link is found' if fail_on_error?
     rescue StandardError => e
       Jekyll.logger.error 'LinkChecker: [Error] Failed to initialize Link Checker'
       raise
@@ -152,7 +167,7 @@ def self.init(site)
   # It also checks for anchors to parts of the same page/doc
 
   def self.process(page)
-    return unless @check_links
+    return unless check_links?
     return if @excluded_paths.match(page.path)
 
     hrefs = page.content.scan(@href_matcher)
@@ -177,11 +192,11 @@ def self.process(page)
   # Saves the collection as a JSON file
 
   def self.verify(_site)
-    return unless @check_links
+    return unless check_links?
 
     @base_url_matcher = %r{^#{@site.config["url"]}#{@site.baseurl}(/.*)$}.freeze
 
-    @urls.sort_by { |url, pages| rand }.each do |url, pages|
+    @urls.sort_by { |_url, _pages| rand }.each do |url, pages|
       location = "./#{pages.to_a.join(', ./')}"
       @failures << "#{url}, linked to in #{location}" unless check(url, location)
     end
@@ -193,7 +208,7 @@ def self.verify(_site)
     end
 
     if !@failures.empty?
-      if @should_build_fatally
+      if fail_on_error?
         Jekyll.logger.error "\nLinkChecker: [Error] #{msg}\n".red
         raise msg
       else
@@ -213,19 +228,15 @@ def self.check(url, location)
 
     url = @site.config['url'] + url if url.start_with? '/docs/'
 
-    if @forced_external_matcher =~ url
-      return true unless @check_forced_external
-
-      return check_external(url, location)
-    end
-
     if @external_matcher =~ url
-      return true unless @check_external_links
+      return true unless check_external_links?
 
-      return check_external(url, location)
-    end
+      check_external(url, location)
+    else
+      return true unless check_internal_links?
 
-    check_internal(url, location)
+      check_internal(url, location)
+    end
   end
 
   ##