Introduce --update-docs flag to synchronously update Theme Check re…

…sources (objects, filters, and tags) (#707)

lib/theme_check/cli.rb

@@ -15,6 +15,7 @@ def initialize
       @include_categories = []
       @exclude_categories = []
       @auto_correct = false
+      @update_docs = false
       @config_path = nil
       @fail_level = :error
       @format = :text
@@ -65,6 +66,10 @@ def option_parser(parser = OptionParser.new, help: true)
         "--print",
         "Output active config to STDOUT"
       ) { @command = :print }
+      @option_parser.on(
+        "--update-docs",
+        "Update Theme Check docs (objects, filters, and tags)"
+      ) { @update_docs = true }
       @option_parser.on(
         "-h", "--help",
         "Show this. Hi!"
@@ -181,6 +186,8 @@ def help
     end
 
     def check(out_stream = STDOUT)
+      update_docs
+
       STDERR.puts "Checking #{@config.root} ..."
       storage = ThemeCheck::FileSystemStorage.new(@config.root, ignored_patterns: @config.ignored_patterns)
       theme = ThemeCheck::Theme.new(storage)
@@ -199,6 +206,14 @@ def check(out_stream = STDOUT)
       end
     end
 
+    def update_docs
+      return unless @update_docs
+
+      puts 'Updating documentation...'
+
+      ThemeCheck::ShopifyLiquid::SourceManager.download
+    end
+
     def profile
       require 'ruby-prof-flamegraph'
 

test/cli_test.rb

@@ -175,6 +175,25 @@ def test_list
     assert_includes(out, "LiquidTag:")
   end
 
+  def test_update_docs
+    ThemeCheck::ShopifyLiquid::SourceManager.expects(:download)
+
+    storage = make_file_system_storage(
+      'layout/theme.liquid' => '',
+      '.theme-check.yml' => <<~YAML,
+        extends: :nothing
+        RequiredDirectories:
+          enabled: false
+      YAML
+    )
+
+    out, _err = capture_io do
+      ThemeCheck::Cli.parse_and_run!([storage.root, '--update-docs'])
+    end
+
+    assert_includes(out, 'Updating documentation...')
+  end
+
   def test_auto_correct
     storage = make_file_system_storage(
       "templats/theme.liquid" => <<~LIQUID,