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# Copyright (C) 2008-2010 Ben Finney <benf@cybersource.com.au>
# Chris Ball <cjb@laptop.org>
# Gianluca Montecchi <gian@grys.it>
# W. Trevor King <wking@drexel.edu>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""Git_ backend.
.. _Git: http://git-scm.com/
"""
import os
import os.path
import re
import shutil
import unittest
import libbe
import libbe.ui.util.user
import base
if libbe.TESTING == True:
import doctest
import sys
def new():
return Git()
class Git(base.VCS):
""":class:`base.VCS` implementation for Git.
"""
name='git'
client='git'
def __init__(self, *args, **kwargs):
base.VCS.__init__(self, *args, **kwargs)
self.versioned = True
def _vcs_version(self):
status,output,error = self._u_invoke_client('--version')
return output.strip()
def _vcs_get_user_id(self):
status,output,error = \
self._u_invoke_client('config', 'user.name', expect=(0,1))
if status == 0:
name = output.rstrip('\n')
else:
name = ''
status,output,error = \
self._u_invoke_client('config', 'user.email', expect=(0,1))
if status == 0:
email = output.rstrip('\n')
else:
email = ''
if name != '' or email != '': # got something!
# guess missing info, if necessary
if name == '':
name = libbe.ui.util.user.get_fallback_username()
if email == '':
email = libe.ui.util.user.get_fallback_email()
return libbe.ui.util.user.create_user_id(name, email)
return None # Git has no infomation
def _vcs_detect(self, path):
if self._u_search_parent_directories(path, '.git') != None :
return True
return False
def _vcs_root(self, path):
"""Find the root of the deepest repository containing path."""
# Assume that nothing funny is going on; in particular, that we aren't
# dealing with a bare repo.
if os.path.isdir(path) != True:
path = os.path.dirname(path)
status,output,error = self._u_invoke_client('rev-parse', '--git-dir',
cwd=path)
gitdir = os.path.join(path, output.rstrip('\n'))
dirname = os.path.abspath(os.path.dirname(gitdir))
return dirname
def _vcs_init(self, path):
self._u_invoke_client('init', cwd=path)
def _vcs_destroy(self):
vcs_dir = os.path.join(self.repo, '.git')
if os.path.exists(vcs_dir):
shutil.rmtree(vcs_dir)
def _vcs_add(self, path):
if os.path.isdir(path):
return
self._u_invoke_client('add', path)
def _vcs_remove(self, path):
if not os.path.isdir(self._u_abspath(path)):
self._u_invoke_client('rm', '-f', path)
def _vcs_update(self, path):
self._vcs_add(path)
def _vcs_get_file_contents(self, path, revision=None):
if revision == None:
return base.VCS._vcs_get_file_contents(self, path, revision)
else:
arg = '%s:%s' % (revision,path)
status,output,error = self._u_invoke_client('show', arg)
return output
def _vcs_path(self, id, revision):
return self._u_find_id(id, revision)
def _vcs_isdir(self, path, revision):
arg = '%s:%s' % (revision,path)
args = ['ls-tree', arg]
kwargs = {'expect':(0,128)}
status,output,error = self._u_invoke_client(*args, **kwargs)
if status != 0:
if 'not a tree object' in error:
return False
raise base.CommandError(args, status, stderr=error)
return True
def _vcs_listdir(self, path, revision):
arg = '%s:%s' % (revision,path)
status,output,error = self._u_invoke_client(
'ls-tree', '--name-only', arg)
return output.rstrip('\n').splitlines()
def _vcs_commit(self, commitfile, allow_empty=False):
args = ['commit', '--all', '--file', commitfile]
if allow_empty == True:
args.append('--allow-empty')
status,output,error = self._u_invoke_client(*args)
else:
kwargs = {'expect':(0,1)}
status,output,error = self._u_invoke_client(*args, **kwargs)
strings = ['nothing to commit',
'nothing added to commit']
if self._u_any_in_string(strings, output) == True:
raise base.EmptyCommit()
full_revision = self._vcs_revision_id(-1)
assert full_revision[:7] in output, \
'Mismatched revisions:\n%s\n%s' % (full_revision, output)
return full_revision
def _vcs_revision_id(self, index):
args = ['rev-list', '--first-parent', '--reverse', 'HEAD']
kwargs = {'expect':(0,128)}
status,output,error = self._u_invoke_client(*args, **kwargs)
if status == 128:
if error.startswith("fatal: ambiguous argument 'HEAD': unknown "):
return None
raise base.CommandError(args, status, stderr=error)
revisions = output.splitlines()
try:
if index > 0:
return revisions[index-1]
elif index < 0:
return revisions[index]
else:
return None
except IndexError:
return None
def _diff(self, revision):
status,output,error = self._u_invoke_client('diff', revision)
return output
def _parse_diff(self, diff_text):
"""_parse_diff(diff_text) -> (new,modified,removed)
`new`, `modified`, and `removed` are lists of files.
Example diff text::
diff --git a/dir/changed b/dir/changed
index 6c3ea8c..2f2f7c7 100644
--- a/dir/changed
+++ b/dir/changed
@@ -1,3 +1,3 @@
hi
-there
+everyone and
joe
diff --git a/dir/deleted b/dir/deleted
deleted file mode 100644
index 225ec04..0000000
--- a/dir/deleted
+++ /dev/null
@@ -1,3 +0,0 @@
-in
-the
-beginning
diff --git a/dir/moved b/dir/moved
deleted file mode 100644
index 5ef102f..0000000
--- a/dir/moved
+++ /dev/null
@@ -1,4 +0,0 @@
-the
-ants
-go
-marching
diff --git a/dir/moved2 b/dir/moved2
new file mode 100644
index 0000000..5ef102f
--- /dev/null
+++ b/dir/moved2
@@ -0,0 +1,4 @@
+the
+ants
+go
+marching
diff --git a/dir/new b/dir/new
new file mode 100644
index 0000000..94954ab
--- /dev/null
+++ b/dir/new
@@ -0,0 +1,2 @@
+hello
+world
"""
new = []
modified = []
removed = []
lines = diff_text.splitlines()
for i,line in enumerate(lines):
if not line.startswith('diff '):
continue
file_a,file_b = line.split()[-2:]
assert file_a.startswith('a/'), \
'missformed file_a %s' % file_a
assert file_b.startswith('b/'), \
'missformed file_a %s' % file_b
file = file_a[2:]
assert file_b[2:] == file, \
'diff file missmatch %s != %s' % (file_a, file_b)
if lines[i+1].startswith('new '):
new.append(file)
elif lines[i+1].startswith('index '):
modified.append(file)
elif lines[i+1].startswith('deleted '):
removed.append(file)
return (new,modified,removed)
def _vcs_changed(self, revision):
return self._parse_diff(self._diff(revision))
if libbe.TESTING == True:
base.make_vcs_testcase_subclasses(Git, sys.modules[__name__])
unitsuite =unittest.TestLoader().loadTestsFromModule(sys.modules[__name__])
suite = unittest.TestSuite([unitsuite, doctest.DocTestSuite()])
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