gitstatus.py

#!/usr/bin/env python
from __future__ import print_function

# change this symbol to whatever you prefer
prehash = ':'

from subprocess import Popen, PIPE

import sys
gitsym = Popen(['git', 'symbolic-ref', 'HEAD'], stdout=PIPE, stderr=PIPE)
branch, error = gitsym.communicate()

error_string = error.decode('utf-8')

if 'fatal: Not a git repository' in error_string:
    sys.exit(0)

branch = branch.decode("utf-8").strip()[11:]

res, err = Popen(['git', 'diff', '--name-status'], stdout=PIPE, stderr=PIPE).communicate()
err_string = err.decode('utf-8')
if 'fatal' in err_string:
    sys.exit(0)
changed_files = [namestat[0] for namestat in res.decode("utf-8").splitlines()]
staged_files = [namestat[0] for namestat in Popen(['git', 'diff', '--staged', '--name-status'],
                stdout=PIPE).communicate()[0].splitlines()]
nb_changed = len(changed_files) - changed_files.count('U')
nb_U = staged_files.count('U')
nb_staged = len(staged_files) - nb_U
staged = str(nb_staged)
conflicts = str(nb_U)
changed = str(nb_changed)
nb_untracked = len([0 for status in Popen(['git', 'status', '--porcelain'], stdout=PIPE)
                   .communicate()[0].decode("utf-8").splitlines() if status.startswith('??')])
untracked = str(nb_untracked)

ahead, behind = 0, 0

rev_hash = prehash + Popen(['git', 'rev-parse', '--short', 'HEAD'],
                           stdout=PIPE).communicate()[0].decode("utf-8")[:-1]

if not branch:  # not on any branch
    branch_display = rev_hash
else:
    branch_display = branch + rev_hash
    remote_name = Popen(['git', 'config', 'branch.%s.remote' % branch],
                        stdout=PIPE).communicate()[0].decode("utf-8").strip()
    if remote_name:
        merge_name = Popen(['git', 'config', 'branch.%s.merge' % branch],
                           stdout=PIPE).communicate()[0].decode("utf-8").strip()
        if remote_name == '.':  # local
            remote_ref = merge_name
        else:
            remote_ref = 'refs/remotes/%s/%s' % (remote_name, merge_name[11:])
        revgit = Popen(['git', 'rev-list', '--left-right', '%s...HEAD' % remote_ref],
                       stdout=PIPE, stderr=PIPE)
        revlist = revgit.communicate()[0]
        if revgit.poll():  # fallback to local
            revlist = Popen(['git', 'rev-list', '--left-right', '%s...HEAD' % merge_name],
                            stdout=PIPE, stderr=PIPE).communicate()[0]
        behead = revlist.decode("utf-8").splitlines()
        ahead = len([x for x in behead if x[0] == '>'])
        behind = len(behead) - ahead

out = ' '.join([
    branch_display,
    str(ahead),
    str(behind),
    staged,
    conflicts,
    changed,
    untracked,
])

print(out, end='')