Hook up the updated `WikiLinkFilter` to the wiki controllers.

app/controllers/projects/wikis_controller.rb

@@ -95,7 +95,7 @@ class Projects::WikisController < Projects::ApplicationController
     ext.analyze(text, author: current_user)
 
     render json: {
-      body: view_context.markdown(text, pipeline: :wiki, project_wiki: @project_wiki),
+      body: view_context.markdown(text, pipeline: :wiki, project_wiki: @project_wiki, page_slug: params[:id]),
       references: {
         users: ext.users.map(&:username)
       }

app/helpers/gitlab_markdown_helper.rb

@@ -108,7 +108,7 @@ module GitlabMarkdownHelper
   def render_wiki_content(wiki_page)
     case wiki_page.format
     when :markdown
-      markdown(wiki_page.content, pipeline: :wiki, project_wiki: @project_wiki)
+      markdown(wiki_page.content, pipeline: :wiki, project_wiki: @project_wiki, page_slug: wiki_page.slug)
     when :asciidoc
       asciidoc(wiki_page.content)
     else

app/views/layouts/project.html.haml

@@ -5,8 +5,8 @@
 
 - content_for :scripts_body_top do
   - project = @target_project || @project
-  - if @project_wiki
-    - markdown_preview_path = namespace_project_wikis_markdown_preview_path(project.namespace, project)
+  - if @project_wiki && @page
+    - markdown_preview_path = namespace_project_wiki_markdown_preview_path(project.namespace, project, params[:id])
   - else
     - markdown_preview_path = markdown_preview_namespace_project_path(project.namespace, project)
   - if current_user

config/routes.rb

@@ -591,7 +591,6 @@ Rails.application.routes.draw do
           # Order matters to give priority to these matches
           get '/wikis/git_access', to: 'wikis#git_access'
           get '/wikis/pages', to: 'wikis#pages', as: 'wiki_pages'
-          post '/wikis/markdown_preview', to:'wikis#markdown_preview'
           post '/wikis', to: 'wikis#create'
 
           get '/wikis/*id/history', to: 'wikis#history', as: 'wiki_history', constraints: WIKI_SLUG_ID
@@ -600,6 +599,7 @@ Rails.application.routes.draw do
           get '/wikis/*id', to: 'wikis#show', as: 'wiki', constraints: WIKI_SLUG_ID
           delete '/wikis/*id', to: 'wikis#destroy', constraints: WIKI_SLUG_ID
           put '/wikis/*id', to: 'wikis#update', constraints: WIKI_SLUG_ID
+          post '/wikis/*id/markdown_preview', to:'wikis#markdown_preview', constraints: WIKI_SLUG_ID, as: 'wiki_markdown_preview'
         end
 
         resource :repository, only: [:show, :create] do

features/steps/project/wiki.rb

@@ -97,7 +97,7 @@ class Spinach::Features::ProjectWiki < Spinach::FeatureSteps
     file = Gollum::File.new(wiki.wiki)
     Gollum::Wiki.any_instance.stub(:file).with("image.jpg", "master", true).and_return(file)
     Gollum::File.any_instance.stub(:mime_type).and_return("image/jpeg")
-    expect(page).to have_link('image', href: "image.jpg")
+    expect(page).to have_link('image', href: "#{wiki.wiki_base_path}/image.jpg")
     click_on "image"
   end
 
@@ -113,7 +113,7 @@ class Spinach::Features::ProjectWiki < Spinach::FeatureSteps
   end
 
   step 'I click on image link' do
-    expect(page).to have_link('image', href: "image.jpg")
+    expect(page).to have_link('image', href: "#{wiki.wiki_base_path}/image.jpg")
     click_on "image"
   end
 

spec/features/markdown_spec.rb

@@ -231,13 +231,14 @@ describe 'GitLab Markdown', feature: true do
   context 'wiki pipeline' do
     before do
       @project_wiki = @feat.project_wiki
+      @project_wiki_page = @feat.project_wiki_page
 
       file = Gollum::File.new(@project_wiki.wiki)
       expect(file).to receive(:path).and_return('images/example.jpg')
       expect(@project_wiki).to receive(:find_file).with('images/example.jpg').and_return(file)
       allow(@project_wiki).to receive(:wiki_base_path) { '/namespace1/gitlabhq/wikis' }
 
-      @html = markdown(@feat.raw_markdown, { pipeline: :wiki, project_wiki: @project_wiki })
+      @html = markdown(@feat.raw_markdown, { pipeline: :wiki, project_wiki: @project_wiki, page_slug: @project_wiki_page.slug })
     end
 
     it_behaves_like 'all pipelines'

spec/helpers/gitlab_markdown_helper_spec.rb

@@ -121,13 +121,14 @@ describe GitlabMarkdownHelper do
     before do
       @wiki = double('WikiPage')
       allow(@wiki).to receive(:content).and_return('wiki content')
+      allow(@wiki).to receive(:slug).and_return('nested/page')
       helper.instance_variable_set(:@project_wiki, @wiki)
     end
 
     it "should use Wiki pipeline for markdown files" do
       allow(@wiki).to receive(:format).and_return(:markdown)
 
-      expect(helper).to receive(:markdown).with('wiki content', pipeline: :wiki, project_wiki: @wiki)
+      expect(helper).to receive(:markdown).with('wiki content', pipeline: :wiki, project_wiki: @wiki, page_slug: "nested/page")
 
       helper.render_wiki_content(@wiki)
     end

spec/support/markdown_feature.rb

@@ -32,6 +32,10 @@ class MarkdownFeature
     @project_wiki ||= ProjectWiki.new(project, user)
   end
 
+  def project_wiki_page
+    @project_wiki_page ||= build(:wiki_page, wiki: project_wiki)
+  end
+
   def issue
     @issue ||= create(:issue, project: project)
   end