simple, not tested, possibly not working, without views, git controllers

app/controllers/git/base_controller.rb

@@ -0,0 +1,15 @@
+class Git::BaseController < ApplicationController
+  before_filter :authenticate_user!
+
+  before_filter :find_project
+  before_filter :find_repository
+
+  protected
+    def find_project
+      @project = Project.find_by_title!(params[:project_name])
+    end
+
+    def find_repository
+      @repository = @project.git_repository
+    end
+end

app/controllers/git/blobs_controller.rb

@@ -0,0 +1,61 @@
+class Git::BlobsController < Git::BaseController
+  before_filter :set_path
+  before_filter :set_treeish
+  before_filter :set_commit_hash
+
+  def show
+    if @commit_hash
+      @tree = @repository.tree(@commit_hash)
+    else
+      @tree = @repository.tree(@treeish)
+      @commit_hash = @repository.repo.log(@treeish, @path).first.id
+    end
+
+    @blob = @tree / @path
+  end
+
+  def blame
+    if @commit_hash
+      @tree = @repository.tree(@commit_hash)
+      @commit = @repository.commits(@commit_hash).first
+    else
+      @tree = @repository.tree(@treeish)
+      @commit = @repository.repo.log(@treeish, @path).first
+    end
+
+    @blob = @tree / @path
+
+    @blame = Grit::Blob.blame(@repository.repo, @commit.id, @path)
+  end
+
+  def raw
+    if @commit_hash
+      @tree = @repository.tree(@commit_hash)
+    else
+      @tree = @repository.tree(@treeish)
+      @commit_hash = @repository.repo.log(@treeish, @path).first.id
+    end
+
+    @blob = @tree / @path
+
+    headers["Content-Disposition"] = %[attachment;filename="#{@blob.name}"]
+    render :text => @blob.data, :content_type => @blob.mime_type
+  end
+
+  protected
+    def find_repository
+#      @repository = @project.repositories.find_by_name!(params[:repository_name])
+    end
+
+    def set_path
+      @path = params[:path].join("/")
+    end
+
+    def set_treeish
+      @treeish = params[:treeish] ? params[:treeish] : "master"
+    end
+
+    def set_commit_hash
+      @commit_hash = params[:commit_hash].present? ? params[:commit_hash] : nil
+    end
+end

app/controllers/git/commits_controller.rb

@@ -0,0 +1,20 @@
+class Git::CommitsController < Git::BaseController
+
+  def index
+    @branch_name = (params[:branch] ? params[:branch] : "master")
+    @path = params[:path]
+
+    @commits = @path.present? ? @repository.repo.log(@branch_name, @path) : @repository.commits(@branch_name)
+  end
+
+  def show
+    @commit = @repository.commits(params[:id]).first
+
+    respond_to do |format|
+      format.html
+      format.diff  { render :text => @commit.diffs.map{|d| d.diff}.join("\n"), :content_type => "text/plain" }
+      format.patch { render :text => @commit.to_patch, :content_type => "text/plain" }
+    end
+  end
+
+end

app/controllers/git/repositories_controller.rb

@@ -0,0 +1,13 @@
+class Git::RepositoriesController < Git::BaseController
+
+  def show
+    @commit = @repository.master
+    @tree = @commit.tree
+  end
+
+  def commits
+    branch_name = (params[:branch] ? params[:branch] : "master")
+    @commits = @repository.commits(branch_name)
+  end
+
+end

app/controllers/git/trees_controller.rb

@@ -0,0 +1,12 @@
+class Git::TreesController < Git::BaseController
+
+  def show
+    @treeish = params[:treeish] ? params[:treeish] : "master"
+    @path = params[:path]
+
+    @tree = @repository.tree(@treeish)
+    @tree = @tree / @path if @path
+
+#    render :template => "repositories/show"
+  end
+end

config/routes.rb

@@ -1,5 +1,24 @@
 Rosa::Application.routes.draw do
   devise_for :users
 
+  # Tree
+  match 'platforms/:platform_name/projects/:project_name/git/tree/:treeish(/*path)', :controller => "git/trees", :action => :show, :treeish => /[0-9a-zA-Z_.\-]*/, :defaults => { :treeish => :master }, :as => :tree
+
+  # Commits
+  match 'platforms/:platform_name//projects/:project_name/git/commits/:treeish(/*path)', :controller => "git/commits", :action => :index, :treeish => /[0-9a-zA-Z_.\-]*/, :defaults => { :treeish => :master }, :as => :commits
+  match 'platforms/:platform_name//projects/:project_name/git/commit/:id(.:format)', :controller => "git/comnits", :action => :show, :defaults => { :format => :html }, :as => :commit
+
+  # Blobs
+  match 'platforms/:platform_name/projects/:project_name/git/blob/:treeish/*path', :controller => "git/blobs", :action => :show, :treeish => /[0-9a-zA-Z_.\-]*/, :defaults => { :treeish => :master }, :as => :blob
+  match 'platforms/:platform_name/projects/:project_name/git/commit/blob/:commit_hash/*path', :controller => "git/blobs", :action => :show, :as => :blob_commit
+
+  # Blame
+  match 'platforms/:platform_name/projects/:project_name/git/blame/:treeish/*path', :controller => "git/blobs", :action => :blame, :treeish => /[0-9a-zA-Z_.\-]*/, :defaults => { :treeish => :master }, :as => :blame
+  match 'platforms/:platform_name/projects/:project_name/git/commit/blame/:commit_hash/*path', :controller => "git/blobs", :action => :blame, :as => :blame_commit
+
+  # Raw
+  match 'platforms/:platform_name/projects/:project_name/git/raw/:treeish/*path', :controller => "git/blobs", :action => :raw, :treeish => /[0-9a-zA-Z_.\-]*/, :defaults => { :treeish => :master }, :as => :raw
+  match 'platforms/:platform_name/projects/:project_name/git/commit/raw/:commit_hash/*path', :controller => "git/blobs", :action => :raw, :as => :raw_commit
+
   root :to => "platforms#index"
-end
+end