Pre Commit hook git error

Question

I am trying to execute a pre commit git hook in python to check if files have line lengths less than 80 chars. However i get a no such file/directory error. i am on fedora and have set the #!usr/bin/python.help would be appreciated

#!/usr/bin/env python
#-*- mode: python -*-

from subprocess import Popen, PIPE
import sys

def run(command):
    p = Popen(command.split(), stdout=PIPE, stderr=PIPE)
    p.wait()
    return p.returncode, p.stdout.read().strip().split(), p.stderr.read()


def precommit():
  _, files_modified, _= run("git diff-index --name-only HEAD")
  i=1
  for fname in files_modified:

    file = open(fname)
    while i==1:
       line = file.readline()
       if not line:
          break
       elif len(line)>80:
          print("Commit failed: Line greater than 80 characters")
          return 1
    return 0
sys.exit(precommit())

Answer 1

Your pre-commit file has extraneous carriage returns in it. This can happen if you edit the file in Windows and copy the file to a Linux computer.

Try these commands:

cp .git/hooks/pre-commit /tmp/pre-commit
tr -d '\r' < /tmp/pre-commit > .git/hooks/pre-commit

And then rerun your git command.