Replace kramdown with redcarpet.

Gemfile

@@ -2,13 +2,6 @@ source 'https://rubygems.org'
 
 gemspec name: 'solargraph'
 
-if RUBY_VERSION =~ /^2\.(1|2)\./
-  gem 'kramdown', '~> 1.16'
-else
-  gem 'kramdown', '~> 2.0'
-  gem 'kramdown-parser-gfm', '~> 1.0'
-end
-
 # Local gemfile for development tools, etc.
 local_gemfile = File.expand_path(".Gemfile", __dir__)
 instance_eval File.read local_gemfile if File.exist? local_gemfile

lib/solargraph/page.rb

@@ -2,7 +2,7 @@
 
 require 'ostruct'
 require 'tilt'
-require 'kramdown'
+require 'redcarpet'
 require 'htmlentities'
 require 'cgi'
 
@@ -24,17 +24,8 @@ def initialize locals, render_method
       # @param text [String]
       # @return [String]
       def htmlify text
-        Kramdown::Document.new(
-          text.to_s.lines.map{|l| l.gsub(/^  /, "\t")}.join,
-          input: 'GFM',
-          entity_output: :symbolic,
-          syntax_highlighter_opts: {
-            block: {
-              line_numbers: false
-            },
-            default_lang: :ruby
-          },
-        ).to_html
+        redcarpet = Redcarpet::Markdown.new(Redcarpet::Render::HTML)
+        redcarpet.render(text.to_s.lines.map{|l| l.gsub(/^  /, "\t")}.join)
       end
 
       # @param code [String]

lib/solargraph/pin/documenting.rb

@@ -2,27 +2,19 @@
 
 require 'rdoc'
 require 'reverse_markdown'
-require 'kramdown'
-begin
-  require 'kramdown-parser-gfm'
-rescue LoadError
-  Solargraph.logger.info "Using legacy kramdown #{Kramdown::VERSION}"
-end
+require 'redcarpet'
 
 module Solargraph
   module Pin
     # A module to add the Pin::Base#documentation method.
     #
     module Documenting
+      [].join
       # @return [String]
       def documentation
         @documentation ||= begin
-          html = Kramdown::Document.new(
-            normalize_indentation(docstring.to_s),
-            input: 'GFM',
-            entity_output: :symbolic,
-            syntax_highlighter: nil
-          ).to_html
+          redcarpet = Redcarpet::Markdown.new(Redcarpet::Render::HTML)
+          html = redcarpet.render(normalize_indentation(docstring.to_s))
           ReverseMarkdown.convert(html, github_flavored: true).lines.map(&:rstrip).join("\n")
         end
       end

solargraph.gemspec

@@ -15,17 +15,17 @@ Gem::Specification.new do |s|
   end
   s.homepage    = 'http://solargraph.org'
   s.license     = 'MIT'
-  s.executables   = ['solargraph', 'solargraph-runtime']
+  s.executables   = ['solargraph']
 
   s.required_ruby_version = '>= 2.1'
 
   s.add_runtime_dependency 'backport', '~> 1.1'
   s.add_runtime_dependency 'bundler', '>= 1.17.2'
   s.add_runtime_dependency 'htmlentities', '~> 4.3', '>= 4.3.4'
   s.add_runtime_dependency 'jaro_winkler', '~> 1.5'
-  s.add_runtime_dependency 'kramdown', '>= 1.16'
   s.add_runtime_dependency 'nokogiri', '>= 1.9.1'
   s.add_runtime_dependency 'parser', '~> 2.3'
+  s.add_runtime_dependency 'redcarpet', '~> 3.4'
   s.add_runtime_dependency 'reverse_markdown', '~> 1.0', '>= 1.0.5'
   s.add_runtime_dependency 'rubocop', '~> 0.52'
   s.add_runtime_dependency 'thor', '~> 0.19', '>= 0.19.4'