fortinmike/git-multirepo

require "multirepo/utility/verbosity"
require "multirepo/utility/popen-runner"
require "multirepo/utility/system-runner"
require "multirepo/config"

module MultiRepo
  class GitRunner
    class << self
      attr_accessor :last_command_succeeded
    end
    
    def self.run(path, git_command, verbosity)
      command = build_command(path, git_command)
      runner_popen(command, verbosity)
    end
    
    def self.run_as_system(path, git_command)
      command = build_command(path, git_command)
      runner_system(command)
    end
    
    def self.build_command(path, git_command)
      if path == "."
        # It is always better to skip -C when running git commands in the
        # current directory (especially in hooks). Doing this prevents
        # any future issues because we automatically fallback to non-"-C" for ".".
        # Fixes bug: https://www.pivotaltracker.com/story/show/94505654
        return "#{git_executable} #{git_command}"
      end
      
      full_command = "#{git_executable} -C \"#{path}\" #{git_command}"
      if Config.instance.running_git_hook
        # True fix for the -C flag issue in pre-commit hook where the status command would
        # fail to provide correct results if a pathspec was provided when performing a commit.
        # http://thread.gmane.org/gmane.comp.version-control.git/263319/focus=263323
        full_command = "sh -c 'unset $(git rev-parse --local-env-vars); #{full_command};'" 
      end
      
      return full_command
    end
    
    def self.runner_popen(full_command, verbosity)
      result, @last_command_succeeded = PopenRunner.run(full_command, verbosity)
      return result
    end
    
    def self.runner_system(full_command)
      result, @last_command_succeeded = SystemRunner.run(full_command)
      return result
    end

    def self.git_executable
      Config.instance.git_executable || "git"
    end
  end
end