ohmyzsh/plugins/git-prompt/gitstatus.py
Robert Bittle 2ae671be76
Improve the regex used by git-prompt to extract tagname
To get the name of the current checked out tag the gitstatus.py script
calls `git log -1 --format="%h%d"`.  Ordinarily this will output
something similar to `(HEAD, tag: foo)`.  Then the regex grabs
everything from `tag:` to the closing `)` and then drops the last
character to give the tag name.  This causes a problem when the current
tag is equal to another tag or branch and the output looks like this:
`(HEAD, tag: foo, origin/master)` and  the tagname gets set to
`tag: foo, origin/master`.  This breaks the whole script because its
output is space delimited and GIT_AHEAD which is supposed to be an
integer gets set to `origin/master` (branch also get set to `foo,`
instead of `foo`, but it's not as big of a problem).  To fix this we
change the regex to be nongreedy so that it will only grab one item from
the list and let the closing match either `, `(comma space) or `)`.  We
also have to use a lookahead since we can't just drop 1 character (`, `
is 2 characters).
2017-05-10 08:55:47 -04:00

84 lines
2.6 KiB
Python

#!/usr/bin/env python
from __future__ import print_function
import sys
import re
import shlex
from subprocess import Popen, PIPE, check_output
def get_tagname_or_hash():
"""return tagname if exists else hash"""
cmd = 'git log -1 --format="%h%d"'
output = check_output(shlex.split(cmd)).decode('utf-8').strip()
hash_, tagname = None, None
# get hash
m = re.search('\(.*\)$', output)
if m:
hash_ = output[:m.start()-1]
# get tagname
m = re.search('tag: .*?[,\)]', output)
if m:
tagname = 'tags/' + output[m.start()+len('tag: '): m.end()-1]
if tagname:
return tagname
elif hash_:
return hash_
return None
# `git status --porcelain --branch` can collect all information
# branch, remote_branch, untracked, staged, changed, conflicts, ahead, behind
po = Popen(['git', 'status', '--porcelain', '--branch'], stdout=PIPE, stderr=PIPE)
stdout, sterr = po.communicate()
if po.returncode != 0:
sys.exit(0) # Not a git repository
# collect git status information
untracked, staged, changed, conflicts = [], [], [], []
ahead, behind = 0, 0
status = [(line[0], line[1], line[2:]) for line in stdout.decode('utf-8').splitlines()]
for st in status:
if st[0] == '#' and st[1] == '#':
if re.search('Initial commit on', st[2]):
branch = st[2].split(' ')[-1]
elif re.search('no branch', st[2]): # detached status
branch = get_tagname_or_hash()
elif len(st[2].strip().split('...')) == 1:
branch = st[2].strip()
else:
# current and remote branch info
branch, rest = st[2].strip().split('...')
if len(rest.split(' ')) == 1:
# remote_branch = rest.split(' ')[0]
pass
else:
# ahead or behind
divergence = ' '.join(rest.split(' ')[1:])
divergence = divergence.lstrip('[').rstrip(']')
for div in divergence.split(', '):
if 'ahead' in div:
ahead = int(div[len('ahead '):].strip())
elif 'behind' in div:
behind = int(div[len('behind '):].strip())
elif st[0] == '?' and st[1] == '?':
untracked.append(st)
else:
if st[1] == 'M':
changed.append(st)
if st[0] == 'U':
conflicts.append(st)
elif st[0] != ' ':
staged.append(st)
out = ' '.join([
branch,
str(ahead),
str(behind),
str(len(staged)),
str(len(conflicts)),
str(len(changed)),
str(len(untracked)),
])
print(out, end='')