From 5f92e5c0a4a88a704c98dcec552a09391c07997f Mon Sep 17 00:00:00 2001
From: digitalMoksha <brett@digitalmoksha.com>
Date: Thu, 26 Aug 2021 11:05:38 -0500
Subject: [PATCH] Support on the command line plaintext and commonmark formats

Command line arguments `--to=commonmark` and
`--to=plaintext` are now supported
---
 bin/commonmarker           |  6 +++++-
 lib/commonmarker/config.rb |  2 +-
 test/test_commands.rb      | 12 +++++++++++-
 3 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/bin/commonmarker b/bin/commonmarker
index a38488a0..cc561989 100755
--- a/bin/commonmarker
+++ b/bin/commonmarker
@@ -55,7 +55,7 @@ def parse_options
       exit
     end
 
-    opts.on('-tFORMAT', '--to=FORMAT', String, 'Specify output format (html, xml)') do |value|
+    opts.on('-tFORMAT', '--to=FORMAT', String, 'Specify output FORMAT') do |value|
       value = value.to_sym
       options.output_format = value if format_options.include?(value)
     end
@@ -108,4 +108,8 @@ when :html
   end
 when :xml
   $stdout.write(doc.to_xml(options.active_render_options))
+when :commonmark
+  $stdout.write(doc.to_commonmark(options.active_render_options))
+when :plaintext
+  $stdout.write(doc.to_plaintext(options.active_render_options))
 end
diff --git a/lib/commonmarker/config.rb b/lib/commonmarker/config.rb
index c7f3347b..12bb92c4 100644
--- a/lib/commonmarker/config.rb
+++ b/lib/commonmarker/config.rb
@@ -25,7 +25,7 @@ module Config
         UNSAFE: (1 << 17),
         FOOTNOTES: (1 << 13)
       }.freeze,
-      format: %i[html xml].freeze
+      format: %i[html xml commonmark plaintext].freeze
     }.freeze
 
     def self.process_options(option, type)
diff --git a/test/test_commands.rb b/test/test_commands.rb
index 9038799e..58d582e6 100644
--- a/test/test_commands.rb
+++ b/test/test_commands.rb
@@ -29,9 +29,19 @@ def test_understands_multiple_extensions
     %w[<table> <tr> <th> a </th> <td> c </td>].each { |html| assert_includes out, html }
   end
 
-  def test_understands_format
+  def test_understands_xml_format
     out = make_bin('strong.md', '--to=xml')
     assert_includes out, '<?xml version="1.0" encoding="UTF-8"?>'
     assert_includes out, '<text xml:space="preserve">strong</text>'
   end
+
+  def test_understands_commonmark_format
+    out = make_bin('strong.md', '--to=commonmark')
+    assert_equal('I am **strong**', out)
+  end
+
+  def test_understands_plaintext_format
+    out = make_bin('strong.md', '--to=plaintext')
+    assert_equal('I am strong', out)
+  end
 end