去掉全局变量，通过filter获取

app/controllers/repositories_controller.rb

@@ -38,7 +38,7 @@ class RepositoriesController < ApplicationController
   before_filter :find_changeset, :only => [:revision, :add_related_issue, :remove_related_issue]
   before_filter :authorize , :except => [:newrepo,:newcreate,:fork, :to_gitlab, :forked, :commit_diff, :project_archive, :quality_analysis]
   # 链接gitlab
-  before_filter :connect_gitlab, :only => [:quality_analysis, :show]
+  before_filter :connect_gitlab, :only => [:quality_analysis, :show, :commit_diff, :find_project_repository]
   # 版本库新增权限
   before_filter :show_rep, :only => [:show]
   accept_rss_auth :revisions
@@ -48,8 +48,7 @@ class RepositoriesController < ApplicationController
   include RepositoriesHelper
   helper :project_score
   #@root_path = RepositoriesHelper::ROOT_PATH
-  $g=Gitlab.client
-  # require 'net/ssh'
+  require 'net/ssh'
 
   rescue_from Redmine::Scm::Adapters::CommandFailed, :with => :show_error_command_failed
   def new
@@ -548,8 +547,8 @@ update
 
   # 每次提交对应的文件差异
   def commit_diff
-    @commit_diff = $g.commit_diff(@project.gpid, params[:changeset])
-    @commit_details = $g.commit(@project.gpid, params[:changeset])
+    @commit_diff = @g.commit_diff(@project.gpid, params[:changeset])
+    @commit_details = @g.commit(@project.gpid, params[:changeset])
     render :layout => 'base_projects'
   end
 
@@ -700,7 +699,8 @@ update
     (render_404; return false) unless @repository
     @path = params[:path].is_a?(Array) ? params[:path].join('/') : params[:path].to_s
     # gitlab端获取默认分支
-    gitlab_branchs = $g.project(@project.gpid).default_branch
+    g = Gitlab.client
+    gitlab_branchs = g.project(@project.gpid).default_branch
     @project.gpid.nil? ? (@rev = params[:rev].blank? ? @repository.default_branch : params[:rev].to_s.strip) : (@rev = params[:rev].blank? ? gitlab_branchs : params[:rev].to_s.strip)
     @rev_to = params[:rev_to]
     unless @rev.to_s.match(REV_PARAM_RE) && @rev_to.to_s.match(REV_PARAM_RE)