From 5786930e831cca2ac53b548858aa71df91e93afb Mon Sep 17 00:00:00 2001
From: aycabta <aycabta@gmail.com>
Date: Sun, 9 Jun 2019 21:34:12 +0900
Subject: [PATCH] Add --load-ri-dir to generate other format

---
 lib/rdoc/options.rb         | 24 ++++++++++++++++---
 lib/rdoc/rdoc.rb            |  9 ++++++-
 test/rdoc/test_rdoc_rdoc.rb | 48 +++++++++++++++++++++++++++++++++++++
 3 files changed, 77 insertions(+), 4 deletions(-)

diff --git a/lib/rdoc/options.rb b/lib/rdoc/options.rb
index a607a76d56..9a8e11d280 100644
--- a/lib/rdoc/options.rb
+++ b/lib/rdoc/options.rb
@@ -105,6 +105,7 @@ class RDoc::Options
     generator_name
     generator_options
     generators
+    load_ri_dir
     locale
     op_dir
     page_dir
@@ -248,6 +249,11 @@ class RDoc::Options
 
   attr_accessor :op_dir
 
+  ##
+  # The loading ri directory to generate other format
+
+  attr_accessor :load_ri_dir
+
   ##
   # The OptionParser for this instance
 
@@ -377,6 +383,7 @@ def init_ivars # :nodoc:
     @markup = 'rdoc'
     @coverage_report = false
     @op_dir = nil
+    @load_ri_dir = nil
     @page_dir = nil
     @pipe = false
     @output_decoration = true
@@ -417,6 +424,7 @@ def init_with map # :nodoc:
     @main_page      = map['main_page']
     @markup         = map['markup']
     @op_dir         = map['op_dir']
+    @load_ri_dir    = map['load_ri_dir']
     @show_hash      = map['show_hash']
     @tab_width      = map['tab_width']
     @template_dir   = map['template_dir']
@@ -477,6 +485,7 @@ def == other # :nodoc:
       @main_page      == other.main_page      and
       @markup         == other.markup         and
       @op_dir         == other.op_dir         and
+      @load_ri_dir    == other.load_ri_dir    and
       @rdoc_include   == other.rdoc_include   and
       @show_hash      == other.show_hash      and
       @static_path    == other.static_path    and
@@ -582,9 +591,10 @@ def finish
 
     @exclude = self.exclude
 
-    finish_page_dir
-
-    check_files
+    unless @load_ri_dir
+      finish_page_dir
+      check_files
+    end
 
     # If no template was specified, use the default template for the output
     # formatter
@@ -944,6 +954,14 @@ def parse argv
 
       opt.separator nil
 
+      opt.on("--load-ri-dir=DIR", Path,
+             "Specify a ri data directory to generate",
+             "other format.") do |value|
+        @load_ri_dir = value
+      end
+
+      opt.separator nil
+
       opt.on("-d",
              "Deprecated --diagram option.",
              "Prevents firing debug mode",
diff --git a/lib/rdoc/rdoc.rb b/lib/rdoc/rdoc.rb
index 0276d430a9..fbf3b59fa3 100644
--- a/lib/rdoc/rdoc.rb
+++ b/lib/rdoc/rdoc.rb
@@ -480,7 +480,14 @@ def document options
 
     @store.load_cache
 
-    file_info = parse_files @options.files
+    if @options.load_ri_dir
+      @store.path = @options.load_ri_dir
+      @store.load_all
+      @stats = RDoc::Stats.new @store, @store.all_files.length, @options.verbosity
+      file_info = @store.all_files
+    else
+      file_info = parse_files @options.files
+    end
 
     @options.default_title = "RDoc Documentation"
 
diff --git a/test/rdoc/test_rdoc_rdoc.rb b/test/rdoc/test_rdoc_rdoc.rb
index 9c94988ffd..45e3d34925 100644
--- a/test/rdoc/test_rdoc_rdoc.rb
+++ b/test/rdoc/test_rdoc_rdoc.rb
@@ -68,6 +68,54 @@ def test_document_with_dry_run # functional test
     assert_equal 'title',          store.title
   end
 
+  def test_load_ri_dir
+    temp_dir do
+      # generate ri files
+      options = RDoc::Options.new
+      options.files = [File.expand_path('../xref_test_case.rb', __FILE__)]
+      options.setup_generator 'ri'
+      options.main_page = 'MAIN_PAGE.rdoc'
+      options.root      = Pathname File.expand_path('..', __FILE__)
+      options.title     = 'title'
+      options.op_dir    = 'ri'
+
+      rdoc = RDoc::RDoc.new
+
+      capture_io do
+        rdoc.document options
+      end
+
+      assert File.directory? 'ri'
+      assert_equal rdoc, rdoc.store.rdoc
+
+      store = rdoc.store
+
+      assert_equal 'MAIN_PAGE.rdoc', store.main
+      assert_equal 'title',          store.title
+
+      # generate HTML from ri files
+      options = RDoc::Options.new
+      options.setup_generator 'darkfish'
+      options.load_ri_dir = 'ri'
+      options.op_dir      = 'another'
+
+      rdoc = RDoc::RDoc.new
+
+      capture_io do
+        rdoc.document options
+      end
+
+      assert File.directory? 'another'
+      assert_equal rdoc, rdoc.store.rdoc
+
+      store = rdoc.store
+
+      assert_equal 'MAIN_PAGE.rdoc', store.main
+      assert_equal 'title',          store.title
+      assert_file 'another/XrefTestCase.html'
+    end
+  end
+
   def test_gather_files
     a = File.expand_path __FILE__
     b = File.expand_path '../test_rdoc_text.rb', __FILE__