Get path for first page of paginated pages

lib/jekyll-github-metadata/edit-link-tag.rb

@@ -35,7 +35,6 @@ def self.def_hash_delegator(hash_method, key, method, default = nil)
       private def_hash_delegator :site_github, :source,         :source, {}
       private def_hash_delegator :source,      :branch,         :branch
       private def_hash_delegator :source,      :path,           :source_path
-      private def_hash_delegator :page,        :path,           :page_path
 
       def render(context)
         @context = context
@@ -72,6 +71,14 @@ def parts
         memoize_conditionally { [repository_url, "edit/", branch, source_path, page_path] }
       end
 
+      def page_path
+        return page["path"] unless page["paginated"]
+
+        site.pages.each do |page|
+          return page["path"] if page.pager && page.pager.page == 1
+        end
+      end
+
       def parts_normalized
         memoize_conditionally do
           parts.map.with_index do |part, index|

spec/edit_link_tag_spec.rb

@@ -5,7 +5,8 @@
   let(:source) { { "branch" => branch, "path" => path } }
   let(:github) { { "repository_url" => repository_url, "source" => source } }
   let(:config) { { "github" => github, "plugins" => ["jekyll-github-metadata"] } }
-  let(:page) { make_page }
+  let(:pager) { nil }
+  let(:page) { make_page({}, pager) }
   let(:site) { make_site(config) }
   let(:render_context) { make_context(:page => page, :site => site) }
   let(:tag_name) { "github_edit_link" }
@@ -114,6 +115,20 @@
     end
   end
 
+  context "paginated path" do
+    let(:pager) { make_pager(2) }
+    before do
+      subject.send(:site).pages << page
+      first_page = make_page({}, make_pager(1))
+      subject.send(:site).pages << first_page
+    end
+
+    it "outputs the proper link for subsequent pages" do
+      expect(page.path).to eql("page/2/page.md")
+      expect(subject.send(:page_path)).to eql("page.md")
+    end
+  end
+
   context "parts" do
     it "builds the parts" do
       expected = [github["repository_url"], "edit/", branch.to_s, "/", "page.md"]

spec/spec_helpers/fixture_helper.rb

@@ -22,8 +22,17 @@ def config_defaults
     }
   end
 
-  def make_page(data = {})
-    Jekyll::Page.new(site, config_defaults["source"], "", "page.md").tap { |page| page.data = data }
+  def make_page(data = {}, pager = nil)
+    data["paginated"] = true unless pager.nil?
+    dir = pager&.page.to_i > 1 ? "page/#{pager.page}/" : ""
+    Jekyll::Page.new(site, config_defaults["source"], dir, "page.md").tap do |page|
+      page.data = data
+      page.pager = pager
+    end
+  end
+
+  def make_pager(page)
+    Pager.new(page)
   end
 
   def make_site(options = {})
@@ -35,4 +44,12 @@ def make_context(registers = {}, environments = {})
     context = { :site => make_site, :page => make_page }.merge(registers)
     Liquid::Context.new(environments, {}, context)
   end
+
+  class Pager
+    attr_accessor :page
+
+    def initialize(page)
+      @page = page
+    end
+  end
 end