implementation.rb

require "fileutils"

class Ci < Merb::Controller

  def _template_location(action, type = nil, controller = controller_name)
    controller == "layout" ? "layout.#{action}.#{type}" : "#{action}.#{type}"
  end

  def push(payload)
    repo = payload[:repository]
    if repo[:name] == "merb" && repo[:user] == "wycats"
      FileUtils.mkdir_p(Dir.pwd / ".srcs")
      
      if File.directory?(Dir.pwd / ".srcs" / repo[:name])
        `cd #{Dir.pwd}/.srcs/#{repo[:name]} && git pull`
      else
        `cd #{Dir.pwd}/.srcs && git clone #{repo[:url]}`
      end
      run_later do
        File.open(Merb.root / "log" / "build-results", "a") do |f|
          result = run_specs
          if result == 0
            green_build(f, result)
          else
            red_build(f, result)
          end
        end
      end
    else
      raise Forbidden
    end
  end
  
  private
  def run_specs
    `cd #{Merb.root}/.srcs/merb && rake spec`
    $?.exitstatus
  end
  
  def green_build(f, result)
    f.puts("Success")
  end
  
  def red_build(f, result)
    f.puts("Fail")
  end
  
end

specs.rb

require File.join(File.dirname(__FILE__), "spec_helper")
FileUtils.rm_rf(Merb.root / ".srcs")
FileUtils.rm_r(Merb.root / "log" / "build-results", :noop => true)
ENV["RESULT"] = "0"

describe "a POST to /ci/push" do
  def request_push(user, name)
    request("/ci/push", :method => "POST",
      "CONTENT_TYPE" => "application/json",
      :input => {:payload => {:repository => 
      {:name => name, :user => user,
       :url => "file://#{File.expand_path(File.dirname(__FILE__))}/fixtures/merb"}}}.to_json)
  end
  
  it "raises a BadRequest if no payload is provided" do
    request("/ci/push", :method => "POST").status.should == 400
  end
  
  it "is forbidden when the repository is incorrect" do
    resp = request_push("wycats", "merbz")
    resp.status.should == 403
  end

  it "is forbidden when the user is incorrect" do
    resp = request_push("wycatz", "merb")
    resp.status.should == 403
  end
  
  describe "when the repository is correct" do
    before(:all) do
      @resp = request_push("wycats", "merb")
    end

    it "is successful" do
      @resp.should be_successful
    end
    
    it "creates a .srcs directory" do
      File.should be_directory(Dir.pwd / ".srcs")
    end
    
    it "creates a directory for the repository" do
      File.should be_directory(Dir.pwd / ".srcs" / "merb")
    end
    
    it "runs git pull on the directory if it already exists" do
      mtime = File.mtime(Dir.pwd / ".srcs" / "merb")
      request_push("wycats", "merb")
      File.mtime(Dir.pwd / ".srcs" / "merb").should == mtime
    end
    
    describe "when the build is green" do
      it "runs the green_build method" do
        File.read(Merb.root / "log" / "build-results").split("\n").last.
          should == "Success"
      end
    end
    
    describe "when the build is red" do
      it "runs the red_build method" do
        ENV["RESULT"] = "1"
        request_push("wycats", "merb")
        
        File.read(Merb.root / "log" / "build-results").split("\n").last.
          should == "Fail"
      end
      
    end
  end
end