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# bzr.py
#
# Copyright (C) 2014 Tim Marston <tim@edm.am>
#
# This file is part of stdhome (hereafter referred to as "this program").
# See http://ed.am/dev/stdhome for more information.
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
import subprocess, os, re, shutil
from subprocess import Popen
import stdhome.the as the
import StringIO
class VcsBzr:
def __init__( self, dir ):
"""Init class
@param dir the fully-qualified directory to work in.
"""
self.dir = dir
def init( self ):
"""Create a new, empty branch
"""
# the directory shouldn't exist
os.mkdir( self.dir )
# bzr init
p = Popen( [ 'bzr', 'init', '.' ], cwd = self.dir,
stdout = subprocess.PIPE, stderr = subprocess.STDOUT )
output = p.communicate()[ 0 ]
if p.returncode > 0:
# attempt to clean-up dir
try:
shutil.rmtree( self.dir )
except OSError:
pass
raise the.program.FatalError( 'bzr init failed', output )
def checkout( self, url ):
"""Checkout a new copy of a remote branch.
@param url the remote repository URL
"""
# the directory shouldn't exist
os.mkdir( self.dir )
# bzr co
p = Popen( [ 'bzr', 'co', url, '.' ], cwd = self.dir,
stdout = subprocess.PIPE, stderr = subprocess.STDOUT )
output = p.communicate()[ 0 ]
if p.returncode > 0:
# attempt to clean-up dir
try:
shutil.rmtree( self.dir )
except OSError:
pass
raise the.program.FatalError( 'bzr checkout failed', output )
def revert( self ):
"""Revert the branch so that there are no outstanding changes or unknown files.
"""
# bzr revert
p = Popen( [ 'bzr', 'revert', '--no-backup' ], cwd = self.dir,
stdout = subprocess.PIPE, stderr = subprocess.STDOUT )
output = p.communicate()[ 0 ]
if p.returncode > 0:
raise the.program.FatalError( 'bzr revert failed', output )
# bzr st
p = Popen( [ 'bzr', 'st' ], cwd = self.dir,
stdout = subprocess.PIPE, stderr = subprocess.STDOUT )
output = p.communicate()[ 0 ]
if p.returncode > 0:
raise the.program.FatalError( 'bzr status failed', output )
files = self.parse_file_blocks( output )
# remove unknown files
if 'unknown' in files:
for file in files[ 'unknown' ]:
full_file = os.path.join( self.dir, file )
if os.path.isfile( full_file ):
os.unlink( full_file )
elif os.full_file.isdir( full_file ):
shutil.rmtree( full_file )
else:
raise RuntimeError( 'exotic file in repo: %s' % file )
def update( self ):
"""Update the branch, pulling down any upstream changes and merging them.
"""
# bzr update
p = Popen( [ 'bzr', 'update' ], cwd = self.dir,
stdout = subprocess.PIPE, stderr = subprocess.STDOUT )
output = p.communicate()[ 0 ]
if p.returncode > 0:
raise the.program.FatalError( 'bzr update failed', output )
def has_changes( self ):
"""Check if the branch has any local modifications.
"""
# bzr status
p = Popen( [ 'bzr', 'status', '--no-pending' ], cwd = self.dir,
stdout = subprocess.PIPE, stderr = subprocess.STDOUT )
output = p.communicate()[ 0 ]
if p.returncode > 0:
raise the.program.FatalError( 'bzr status failed', output )
files = self.parse_file_blocks( output )
return True if len( files ) else False
def get_conflicts( self ):
"""Return a list of files that have conflicts.
"""
# bzr status
p = Popen( [ 'bzr', 'status', '--no-pending' ], cwd = self.dir,
stdout = subprocess.PIPE, stderr = subprocess.STDOUT )
output = p.communicate()[ 0 ]
if p.returncode > 0:
raise the.program.FatalError( 'bzr status failed', output )
files = self.parse_file_blocks( output )
return files['conflicts'] if 'conflicts' in files else None
def parse_file_blocks( self, output ):
res = dict()
current = None
buf = StringIO.StringIO( output )
for line in buf:
matches = re.search( '^([a-z ]+):$', line, re.I )
if matches:
current = matches.group( 1 )
continue
if current:
matches = re.search( '^ ([^ ].*)$', line )
if matches:
if not current in res:
res[ current ] = list()
res[ current ].append( matches.group( 1 ) )
continue
if re.search( '^[0-9]+ shelf exists', line ): continue
if re.search( '^working tree is out of date', line ): continue
raise self.ParseError( "unrecognised line: %s" % line )
return res
class ParseError( Exception ):
pass
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