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# head.py
# Copyright (C) 2008-2010 Michael Trier (mtrier@gmail.com) and contributors
#
# This module is part of GitPython and is released under
# the BSD License: http://www.opensource.org/licenses/bsd-license.php
import commit
class Head(object):
"""
A Head is a named reference to a Commit. Every Head instance contains a name
and a Commit object.
Examples::
>>> repo = Repo("/path/to/repo")
>>> head = repo.heads[0]
>>> head.name
'master'
>>> head.commit
<git.Commit "1c09f116cbc2cb4100fb6935bb162daa4723f455">
>>> head.commit.id
'1c09f116cbc2cb4100fb6935bb162daa4723f455'
"""
def __init__(self, name, commit):
"""
Initialize a newly instanced Head
`name`
is the name of the head
`commit`
is the Commit object that the head points to
"""
self.name = name
self.commit = commit
@classmethod
def find_all(cls, repo, **kwargs):
"""
Find all Heads in the repository
`repo`
is the Repo
`kwargs`
Additional options given as keyword arguments, will be passed
to git-for-each-ref
Returns
git.Head[]
List is sorted by committerdate
"""
options = {'sort': "committerdate",
'format': "%(refname)%00%(objectname)"}
options.update(kwargs)
output = repo.git.for_each_ref("refs/heads", **options)
return cls.list_from_string(repo, output)
@classmethod
def list_from_string(cls, repo, text):
"""
Parse out head information into a list of head objects
``repo``
is the Repo
``text``
is the text output from the git-for-each-ref command
Returns
git.Head[]
"""
heads = []
for line in text.splitlines():
heads.append(cls.from_string(repo, line))
return heads
@classmethod
def from_string(cls, repo, line):
"""
Create a new Head instance from the given string.
``repo``
is the Repo
``line``
is the formatted head information
Format::
name: [a-zA-Z_/]+
<null byte>
id: [0-9A-Fa-f]{40}
Returns
git.Head
"""
full_name, ids = line.split("\x00")
if full_name.startswith('refs/heads/'):
name = full_name[len('refs/heads/'):]
else:
name = full_name
c = commit.Commit(repo, id=ids)
return Head(name, c)
def __repr__(self):
return '<git.Head "%s">' % self.name
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