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# Fedora Developer Shell
#
# 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; version 2 of the License.
#
# 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 Library 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# Authors: Yaakov M. Nemoy <ynemoy@redhat.com>
#
from __future__ import with_statement
import os
import re
from contextlib import contextmanager
from os import getcwd
from os.path import join, basename, exists
from subprocess import Popen, PIPE
from base.util import pwd, log, rm, log_file, copy, move
from modules.revisioncontrol import RevisionControl
hash_re = re.compile(r'hash=\'(\w|-|.*?)\'', re.MULTILINE)
date_re = re.compile(r'date=\'(\d*?)\'', re.MULTILINE)
class Darcs(RevisionControl):
'''manages single source packages where the primary source is darcs
'''
def __init__(self, name=None, url=None, *args):
if url:
#split chokes on URLs that end in a /
url = url[:-1] if url.endswith('/') else url
tgt = basename(url)
if not name:
name = tgt
self.get(url, tgt, *args)
super(Darcs, self).__init__(name)
if url:
self.cfg['vc_url'] = url
self.cfg['hackage_name'] = tgt
self.cfg['source'] = '.'
with pwd(self.branch_dir):
self.get(self.dir, 'orig')
self.set_current_src()
def get(self, src, tgt, *args):
'''sets up a branch given arguments, taken from a source with a target
the idioms of branching in different VCSes vary, and a common
api for this in devshell has not yet been realized
currently, this creates a new temporary local branch in darcs
and sets the source to it
'''
with log_file('darcs.log') as darcs_out:
# NB: args is a tuple, must be converted
p = Popen(['darcs', 'get'] + list(args) + [src, tgt],
stdout = darcs_out, stderr = darcs_out)
log.info('darcs get %s %s, please wait....' % (src, tgt))
p.communicate()
# def checkout(self, tgt, url, *args):
# '''checks out source from an upstream url
# the difference between this and get is that it reflects an initial pull
# idiom found in other VCSes. It also handles setting vc_url and the
# canonical name, based on tgt
# '''
# self.cfg['vc_url'] = url
# self.get(url, tgt, *args)
@property
def vc_url(self):
'''the url where the source was fetched from originally
this may be moved to revision control in the future
'''
return self.cfg['vc_url']
@property
def hackage_name(self):
'''assuming this package is a haskell package, what is the canonical name
this name may be changed in the future
'''
return self.cfg['hackage_name']
@contextmanager
def src_dir(self, *args):
'''executes a code block inside a specific branch and or checkout
'''
with src(*args):
with pwd(self.cfg['source']):
yield
@contextmanager
def src(self, *args):
'''executes a code block with a particular branch or checkout
if there are no args, this block is executed in the raw
'''
if args:
old_src = self.cfg['source']
self.set_cur_to(*args)
yield
if args:
rm(self.cfg['source'])
self.cfg['source'] = old_src
self.set_current_src()
def set_current_src(self):
'''sets the current internal state to reflect the current head
chances are, the user should rarely mess with this.
this may change, because rather than using .patch files for rpm
handling, we may ask the user to commit all the changes to darcs,
and then have devshell generate .patch files automatically instead
'''
with pwd(self.cfg['source']):
p = Popen(['darcs', 'changes', '--xml-output', '--last=1'],
stdout = PIPE, stderr = PIPE)
change = p.communicate()[0]
hash = hash_re.search(change).groups()[0]
date = date_re.search(change).groups()[0]
self.cfg['head'] = (hash, date)
def set_cur_to(self, *args):
'''passes arbitrary args to darcs get and makes a branch out of it
this is not really optimal, because it only does things temporary,
we need to look at as systematic way to handle branching.
looking at a potential git and a potential cvs module may help
'''
if len(args) >= 2 and args[0] == 'new':
branch_name = args[1]
args = args[2:]
else:
branch_name = ''
if len(args) == 1 and args[0] == 'head':
log.debug('doing head')
self.cfg['source'] = '.'
elif len(args) == 2 and args[0] == 'branch':
self.cfg['source'] = join(self.branch, args[1])
else:
log.debug('creating new branch')
index = str(hash(args))
index_dir = join(self.branch, index)
with pwd(self.dir):
if not exists(index_dir):
log.debug('index dir should be ' + index_dir)
self.get(self.source(), index_dir, *args)
self.cfg['source'] = index_dir
if branch_name:
with pwd(self.branch_dir):
self.get(index, branch_name)
self.set_current_src()
def set_cur_to_patch(self, hash):
'''sets the current branch to fork off a particular hash'''
self.set_cur_to('--to-match', 'hash ' + hash)
def set_cur_to_tag(self, tag):
'''sets the current branch to fork off a particular tag'''
self.set_cur_to('--tag', tag)
@property
def date(self):
'''get's the timestamp of the latest patch on HEAD of the current branch'''
return self.cfg['head'][1]
@property
def hash(self):
'''gets the hash of the latest patch on HEAD of the current branch'''
return self.cfg['head'][0]
def print_date(self):
'''prints the timestamp of the latest patch on HEAD of the current branch'''
log.info('The timestamp is ' + self.date)
def print_hash(self):
'''prints the hash of the latest patch on HEAD of the current branch'''
log.info('The hash is ' + self.hash)
@contextmanager
def patch(self, hash):
'''executes a block of code on top a particular patch'''
with self.src('--to-match', 'hash ' + hash):
yield
@contextmanager
def tag(self, tag):
'''executes a particular block of code on top of a particular tag'''
with self.src('--tag', tag):
yield
def setup_sourceball(self, ver, delete_old=False):
'''gets darcs to spit out a sourceball to be used in rpm making by other modules'''
log.debug('someone set us up the bomb')
if delete_old:
with pwd(self.pkg_src_dir):
rm(self.sourceball)
name = self.hackage_name
date = self.date
full_name = '%s-%s.%sdarcs' % (name, ver, date)
log.debug('full name is ' + full_name)
sourceball = full_name + '.tar.gz'
with pwd(self.source_dir):
with log_file('darcs.log') as darcs_out:
log.debug('we get signal')
p = Popen(['darcs', 'dist', '-d', full_name],
stdout=darcs_out, stderr=darcs_out)
log.info('generating tarball %s.tar.gz, please wait...'
% full_name)
p.communicate()
with pwd(self.pkg_src_dir):
move(join(self.source_dir, sourceball), sourceball)
self.cfg['sourceball'] = sourceball
__all__ = ['Darcs']
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