From 719da1b81311deaa9c5adc18dc2d525a8781c204 Mon Sep 17 00:00:00 2001
From: Ary Borenszweig <asterite@gmail.com>
Date: Mon, 26 Aug 2019 09:04:32 -0300
Subject: [PATCH] Revert "Move Markdown to inside the compiler. (#8115)"

This reverts commit 491f26b10cf67c1131aa035c4d720b53f30eab72.
---
 .../doc => std/markdown}/markdown_spec.cr     |  6 ++--
 src/compiler/crystal/tools/doc/generator.cr   |  2 +-
 .../crystal/tools/doc/markdown/markdown.cr    | 36 -------------------
 ...c_renderer.cr => markdown_doc_renderer.cr} |  8 ++---
 .../crystal/tools/playground/server.cr        |  4 +--
 src/docs_main.cr                              |  1 +
 src/markdown.cr                               | 29 +++++++++++++++
 .../tools/doc => }/markdown/html_renderer.cr  |  2 +-
 .../crystal/tools/doc => }/markdown/parser.cr |  2 +-
 .../tools/doc => }/markdown/renderer.cr       |  2 +-
 10 files changed, 42 insertions(+), 50 deletions(-)
 rename spec/{compiler/crystal/tools/doc => std/markdown}/markdown_spec.cr (97%)
 delete mode 100644 src/compiler/crystal/tools/doc/markdown/markdown.cr
 rename src/compiler/crystal/tools/doc/{markdown/doc_renderer.cr => markdown_doc_renderer.cr} (96%)
 create mode 100644 src/markdown.cr
 rename src/{compiler/crystal/tools/doc => }/markdown/html_renderer.cr (97%)
 rename src/{compiler/crystal/tools/doc => }/markdown/parser.cr (99%)
 rename src/{compiler/crystal/tools/doc => }/markdown/renderer.cr (94%)

diff --git a/spec/compiler/crystal/tools/doc/markdown_spec.cr b/spec/std/markdown/markdown_spec.cr
similarity index 97%
rename from spec/compiler/crystal/tools/doc/markdown_spec.cr
rename to spec/std/markdown/markdown_spec.cr
index 1868cb814468..27009ebe427c 100644
--- a/spec/compiler/crystal/tools/doc/markdown_spec.cr
+++ b/spec/std/markdown/markdown_spec.cr
@@ -1,13 +1,13 @@
 require "spec"
-require "../../../../../src/compiler/crystal/tools/doc/markdown"
+require "markdown"
 
 private def assert_render(input, output, file = __FILE__, line = __LINE__)
   it "renders #{input.inspect}", file, line do
-    Crystal::Doc::Markdown.to_html(input).should eq(output), file, line
+    Markdown.to_html(input).should eq(output), file, line
   end
 end
 
-describe Crystal::Doc::Markdown do
+describe Markdown do
   assert_render "", ""
   assert_render "Hello", "<p>Hello</p>"
   assert_render "Hello\nWorld", "<p>Hello\nWorld</p>"
diff --git a/src/compiler/crystal/tools/doc/generator.cr b/src/compiler/crystal/tools/doc/generator.cr
index ccad5e3bb7ac..578d6723cb8d 100644
--- a/src/compiler/crystal/tools/doc/generator.cr
+++ b/src/compiler/crystal/tools/doc/generator.cr
@@ -303,7 +303,7 @@ class Crystal::Doc::Generator
     string = isolate_flag_lines string
     string += build_flag_lines_from_annotations context
     markdown = String.build do |io|
-      Markdown.parse string, Markdown::DocRenderer.new(context, io)
+      Markdown.parse string, MarkdownDocRenderer.new(context, io)
     end
     generate_flags markdown
   end
diff --git a/src/compiler/crystal/tools/doc/markdown/markdown.cr b/src/compiler/crystal/tools/doc/markdown/markdown.cr
deleted file mode 100644
index ebfaf869a75d..000000000000
--- a/src/compiler/crystal/tools/doc/markdown/markdown.cr
+++ /dev/null
@@ -1,36 +0,0 @@
-# Basic implementation of Markdown for the `crystal doc` tool.
-#
-# It lacks many features and it has some bugs too. Eventually we should replace
-# it with something more feature-complete (like https://github.com/icyleaf/markd)
-# but that means the compiler will start depending on external shards. Otherwise
-# we should extract the doc as a separate tool/binary.
-# We don't expose this library in the standard library because it's probable
-# that we will never make it feature complete.
-#
-# Usage:
-#
-# ```
-# require "compiler/crystal/tools/doc/markdown"
-#
-# text = "## This is title \n This is a [link](http://crystal-lang.org)"
-#
-# Crystal::Doc::Markdown.to_html(text)
-# # => <h2>This is title</h2>
-# # => <p>This is a <a href="http://crystal-lang.org">link</a></p>
-# ```
-module Crystal::Doc::Markdown
-  def self.parse(text, renderer)
-    parser = Parser.new(text, renderer)
-    parser.parse
-  end
-
-  def self.to_html(text) : String
-    String.build do |io|
-      parse text, Markdown::HTMLRenderer.new(io)
-    end
-  end
-end
-
-require "./parser"
-require "./renderer"
-require "./html_renderer"
diff --git a/src/compiler/crystal/tools/doc/markdown/doc_renderer.cr b/src/compiler/crystal/tools/doc/markdown_doc_renderer.cr
similarity index 96%
rename from src/compiler/crystal/tools/doc/markdown/doc_renderer.cr
rename to src/compiler/crystal/tools/doc/markdown_doc_renderer.cr
index de5bed317c14..3c46be773491 100644
--- a/src/compiler/crystal/tools/doc/markdown/doc_renderer.cr
+++ b/src/compiler/crystal/tools/doc/markdown_doc_renderer.cr
@@ -1,13 +1,11 @@
-require "./*"
+require "markdown"
 
-class Crystal::Doc::Markdown::DocRenderer < Crystal::Doc::Markdown::HTMLRenderer
+class Crystal::Doc::MarkdownDocRenderer < Markdown::HTMLRenderer
   def self.new(obj : Constant | Macro | Method, io)
     new obj.type, io
   end
 
-  @type : Crystal::Doc::Type
-
-  def initialize(@type : Crystal::Doc::Type, io)
+  def initialize(@type : Type, io)
     super(io)
 
     @inside_inline_code = false
diff --git a/src/compiler/crystal/tools/playground/server.cr b/src/compiler/crystal/tools/playground/server.cr
index 7cc303a1819e..9b50f1d6884c 100644
--- a/src/compiler/crystal/tools/playground/server.cr
+++ b/src/compiler/crystal/tools/playground/server.cr
@@ -1,8 +1,8 @@
 require "http/server"
 require "logger"
 require "ecr/macros"
+require "markdown"
 require "compiler/crystal/tools/formatter"
-require "compiler/crystal/tools/doc/markdown"
 
 module Crystal::Playground
   class Session
@@ -247,7 +247,7 @@ module Crystal::Playground
                   end
 
         if extname == ".md" || extname == ".cr"
-          content = Crystal::Doc::Markdown.to_html(content)
+          content = Markdown.to_html(content)
         end
         content
       rescue e
diff --git a/src/docs_main.cr b/src/docs_main.cr
index c84fb0ecd71e..6fec82fcfc7b 100644
--- a/src/docs_main.cr
+++ b/src/docs_main.cr
@@ -19,6 +19,7 @@ require "./llvm"
 require "./logger"
 require "./macros"
 require "./math/**"
+require "./markdown"
 require "./oauth"
 require "./oauth2"
 require "./openssl"
diff --git a/src/markdown.cr b/src/markdown.cr
new file mode 100644
index 000000000000..79d63d171a2f
--- /dev/null
+++ b/src/markdown.cr
@@ -0,0 +1,29 @@
+# Markdown library parses Markdown text. It supports rendering to HTML text.
+#
+# Usage:
+#
+# ```
+# require "markdown"
+#
+# text = "## This is title \n This is a [link](http://crystal-lang.org)"
+#
+# Markdown.to_html(text)
+# # => <h2>This is title</h2>
+# # => <p>This is a <a href="http://crystal-lang.org">link</a></p>
+# ```
+#
+# NOTE: This library is in its early stage. Many features are still in development.
+class Markdown
+  def self.parse(text, renderer)
+    parser = Parser.new(text, renderer)
+    parser.parse
+  end
+
+  def self.to_html(text) : String
+    String.build do |io|
+      parse text, Markdown::HTMLRenderer.new(io)
+    end
+  end
+end
+
+require "./markdown/*"
diff --git a/src/compiler/crystal/tools/doc/markdown/html_renderer.cr b/src/markdown/html_renderer.cr
similarity index 97%
rename from src/compiler/crystal/tools/doc/markdown/html_renderer.cr
rename to src/markdown/html_renderer.cr
index e2f17ff1abb2..093a1a3c186f 100644
--- a/src/compiler/crystal/tools/doc/markdown/html_renderer.cr
+++ b/src/markdown/html_renderer.cr
@@ -1,6 +1,6 @@
 require "./renderer"
 
-class Crystal::Doc::Markdown::HTMLRenderer
+class Markdown::HTMLRenderer
   include Renderer
 
   def initialize(@io : IO)
diff --git a/src/compiler/crystal/tools/doc/markdown/parser.cr b/src/markdown/parser.cr
similarity index 99%
rename from src/compiler/crystal/tools/doc/markdown/parser.cr
rename to src/markdown/parser.cr
index 9ce80dc60058..fb3355d95d60 100644
--- a/src/compiler/crystal/tools/doc/markdown/parser.cr
+++ b/src/markdown/parser.cr
@@ -1,4 +1,4 @@
-class Crystal::Doc::Markdown::Parser
+class Markdown::Parser
   record PrefixHeader, count : Int32
   record UnorderedList, char : Char
   record CodeFence, language : String
diff --git a/src/compiler/crystal/tools/doc/markdown/renderer.cr b/src/markdown/renderer.cr
similarity index 94%
rename from src/compiler/crystal/tools/doc/markdown/renderer.cr
rename to src/markdown/renderer.cr
index fbb439c19fd5..daeaa07053bd 100644
--- a/src/compiler/crystal/tools/doc/markdown/renderer.cr
+++ b/src/markdown/renderer.cr
@@ -1,4 +1,4 @@
-module Crystal::Doc::Markdown::Renderer
+module Markdown::Renderer
   abstract def begin_paragraph
   abstract def end_paragraph
   abstract def begin_italic