old_contents: #! /usr/bin/env python
  #
  # git-squeeze
  # Copyright (c) Ryan Kadwell <ryan@riaka.ca>
  #
  # Script to process file changes on a git repository as commits are made.
  #
  # Author: Ryan Kadwell <ryan@riaka.ca>
  
  import subprocess
  import os
  import psutil
  
  class Command(object):
     """Wrapper for subprocess.Popen"""
  
     @staticmethod
     def run(args, cwd="."):
        """Wrap subprocess.Popen command execution
  
           Runs a command using subprocess and return a tuple containing the
           return code, stdout, stderr.
        """
        proc = subprocess.Popen(
           args, stderr=subprocess.PIPE, stdout=subprocess.PIPE, cwd=cwd
        )
  
        proc.wait() # wait for command to finish before we carry on
  
        stdout = []
        for line in proc.stdout:
           stdout.append(line.rstrip('\n'))
  
        stderr = []
        for line in proc.stderr:
           stderr.append(line.rstrip('\n'))
  
        return proc.returncode, stdout, stderr
  
  
  class UI(object):
  
     def __init__(self):
        pass
  
     def write(self):
        pass
  
  
  def createPIDLockFile(filename):
     # A PID file exists we can check if we are able to remove it (i.e. the process
     # has ended but did not remove the lock file)
     if os.path.exists(filename) and not removePIDLockFile(filename):
        return False
  
     with open(filename, "w") as f:
        f.write(str(os.getpid()))
  
     return True
  
  
  def removePIDLockFile(filename):
     with open(filename, "r") as f:
        pid = f.read().strip()
  
     # Check if the process is still running and only remove if it is not
     process = [p for p in psutil.get_process_list() if p.pid==pid]
     if not process:
        os.remove(filename)
        return True
     else:
        return False
  
new_contents: #! /usr/bin/env python
  #
  # git-squeeze
  # Copyright (c) Ryan Kadwell <ryan@riaka.ca>
  #
  # Script to process file changes on a git repository as commits are made.
  #
  # Author: Ryan Kadwell <ryan@riaka.ca>
  
  import subprocess
  import os
  import psutil
  
  class Command(object):
     """Wrapper for subprocess.Popen"""
  
     @staticmethod
     def run(args, cwd="."):
        """Wrap subprocess.Popen command execution
  
           Runs a command using subprocess and return a tuple containing the
           return code, stdout, stderr.
        """
        proc = subprocess.Popen(
           args, stderr=subprocess.PIPE, stdout=subprocess.PIPE, cwd=cwd
        )
  
        proc.wait() # wait for command to finish before we carry on
  
        stdout = []
        for line in proc.stdout:
           stdout.append(line.rstrip('\n'))
  
        stderr = []
        for line in proc.stderr:
           stderr.append(line.rstrip('\n'))
  
        return proc.returncode, stdout, stderr
  
  
  def createPIDLockFile(filename):
     # A PID file exists we can check if we are able to remove it (i.e. the process
     # has ended but did not remove the lock file)
     if os.path.exists(filename) and not removePIDLockFile(filename):
        return False
  
     with open(filename, "w") as f:
        f.write(str(os.getpid()))
  
     return True
  
  
  def removePIDLockFile(filename):
     with open(filename, "r") as f:
        pid = f.read().strip()
  
     # Check if the process is still running and only remove if it is not
     process = [p for p in psutil.get_process_list() if p.pid==pid]
     if not process:
        os.remove(filename)
        return True
     else:
        return False
  
subject: Remove empty UI class