Fix relative links in other markup formats

- Apply the RelativeLinkFilter filter to other formats, e.g.,
  reStructuredText so links from the Files view or the Project view work
- Remove the AsciidocPipeline pipeline

Fixes #3533.

CHANGELOG

@@ -16,6 +16,7 @@ v 8.5.0 (unreleased)
     set it up
   - API: Added "merge_requests/:merge_request_id/closes_issues" (Gal Schlezinger)
   - Fix diff comments loaded by AJAX to load comment with diff in discussion tab
+  - Fix relative links in other markup formats (Ben Boeckel)
   - Whitelist raw "abbr" elements when parsing Markdown (Benedict Etzel)
   - Fix label links for a merge request pointing to issues list
   - Don't vendor minified JS

app/helpers/application_helper.rb

@@ -212,8 +212,7 @@ module ApplicationHelper
         file_content
       end
     else
-      GitHub::Markup.render(file_name, file_content).
-        force_encoding(file_content.encoding).html_safe
+      other_markup(file_name, file_content)
     end
   rescue RuntimeError
     simple_format(file_content)

app/helpers/gitlab_markdown_helper.rb

@@ -78,6 +78,21 @@ module GitlabMarkdownHelper
     )
   end
+  def other_markup(file_name, text)
+    Gitlab::OtherMarkup.render(
+      file_name,
+      text,
+      project:      @project,
+      current_user: (current_user if defined?(current_user)),
+
+      # RelativeLinkFilter
+      project_wiki:   @project_wiki,
+      requested_path: @path,
+      ref:            @ref,
+      commit:         @commit
+    )
+  end
+
   # Return the first line of +text+, up to +max_chars+, after parsing the line
   # as Markdown.  HTML tags in the parsed output are not counted toward the
   # +max_chars+ limit.  If the length limit falls within a tag's contents, then

lib/banzai/pipeline/asciidoc_pipeline.rb

-module Banzai
-  module Pipeline
-    class AsciidocPipeline < BasePipeline
-      def self.filters
-        [
-          Filter::RelativeLinkFilter
-        ]
-      end
-    end
-  end
-end

lib/gitlab/asciidoc.rb

@@ -31,9 +31,7 @@ module Gitlab
       html = ::Asciidoctor.convert(input, asciidoc_opts)
-      if context[:project]
-        html = Banzai.render(html, context.merge(pipeline: :asciidoc))
-      end
+      html = Banzai.post_process(html, context)
       html.html_safe
     end

lib/gitlab/other_markup.rb

+module Gitlab
+  # Parser/renderer for markups without other special support code.
+  module OtherMarkup
+
+    # Public: Converts the provided markup into HTML.
+    #
+    # input         - the source text in a markup format
+    # context       - a Hash with the template context:
+    #                 :commit
+    #                 :project
+    #                 :project_wiki
+    #                 :requested_path
+    #                 :ref
+    #
+    def self.render(file_name, input, context)
+      html = GitHub::Markup.render(file_name, input).
+        force_encoding(input.encoding)
+
+      html = Banzai.post_process(html, context)
+
+      html.html_safe
+    end
+  end
+end

spec/helpers/application_helper_spec.rb

@@ -293,6 +293,10 @@ describe ApplicationHelper do
   describe 'render_markup' do
     let(:content) { 'Noël' }
+    let(:user) { create(:user) }
+    before do
+      allow(helper).to receive(:current_user).and_return(user)
+    end
     it 'should preserve encoding' do
       expect(content.encoding.name).to eq('UTF-8')

spec/lib/gitlab/asciidoc_spec.rb

@@ -42,22 +42,6 @@ module Gitlab
       end
     end
-    context "with project in context" do
-
-      let(:context) { { project: create(:project) } }
-
-      it "should filter converted input via HTML pipeline and return result" do
-        filtered_html = '<b>ASCII</b>'
-
-        allow(Asciidoctor).to receive(:convert).and_return(html)
-        expect(Banzai).to receive(:render)
-          .with(html, context.merge(pipeline: :asciidoc))
-          .and_return(filtered_html)
-
-        expect( render('foo', context) ).to eql filtered_html
-      end
-    end
-
     def render(*args)
       described_class.render(*args)
     end