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# vim: set fileencoding=utf-8 :
#
# (C) 2011 Guido Guenther <agx@sigxcpu.org>
# 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import os
import re
from errors import GbpError
class Patch(object):
"""
A patch in a patchqueue
@ivar path: path to the patch
@type path: string
@ivar topic: the topic of the patch
@type topic: string
@ivar strip: path components to strip (think patch -p<strip>)
@type strip: integer
"""
def __init__(self, path, topic=None, strip=None):
self.path = path
self.topic = topic
self.strip = strip
def __repr__(self):
repr = "<gbp.pq.Patch path='%s' " % self.path
if self.topic:
repr += "topic='%s' " % self.topic
if self.strip != None:
repr += "strip=%d " % self.strip
repr += ">"
return repr
class PatchQueue(list):
@classmethod
def read_series_file(klass, seriesfile):
"""Read a series file into gbp.pq.Patch objects"""
patch_dir = os.path.dirname(seriesfile)
try:
s = file(seriesfile)
except Exception, err:
raise GbpError("Cannot open series file: %s" % err)
queue = klass._read_series(s, patch_dir)
s.close()
return queue
@classmethod
def _read_series(klass, series, patch_dir):
"""
Read patch series
>>> PatchQueue._read_series(['a/b', \
'a -p1', \
'a/b -p2'], '.') # doctest:+NORMALIZE_WHITESPACE
[<gbp.pq.Patch path='./a/b' topic='a' >,
<gbp.pq.Patch path='./a' strip=1 >,
<gbp.pq.Patch path='./a/b' topic='a' strip=2 >]
@param series: series of patches in quilt format
@type series: iterable of strings
@param patch_dir: path prefix to prepend to each patch path
@type patch_dir: string
"""
queue = PatchQueue()
for line in series:
queue.append(klass._parse_line(line, patch_dir))
return queue
@staticmethod
def _get_topic(line):
"""
Get the topic from the path's path
>>> PatchQueue._get_topic("a/b c")
'a'
>>> PatchQueue._get_topic("asdf")
>>> PatchQueue._get_topic("/asdf")
"""
topic = os.path.dirname(line)
if topic in [ '', '/' ]:
topic = None
return topic
@staticmethod
def _split_strip(line):
"""
Separate the -p<num> option from the patch name
>>> PatchQueue._split_strip("asdf -p1")
('asdf', 1)
>>> PatchQueue._split_strip("a/nice/patch")
('a/nice/patch', None)
>>> PatchQueue._split_strip("asdf foo")
('asdf foo', None)
"""
patch = line
strip = None
split = line.rsplit(None, 1)
if len(split) > 1:
m = re.match('-p(?P<level>[0-9]+)', split[1])
if m:
patch = split[0]
strip = int(m.group('level'))
return (patch, strip)
@classmethod
def _parse_line(klass, line, patch_dir):
"""
Parse a single line from a patch file
>>> PatchQueue._parse_line("a/b -p1", '/tmp/patches')
<gbp.pq.Patch path='/tmp/patches/a/b' topic='a' strip=1 >
>>> PatchQueue._parse_line("a/b", '.')
<gbp.pq.Patch path='./a/b' topic='a' >
"""
line = line.rstrip()
topic = klass._get_topic(line)
(patch, split) = klass._split_strip(line)
return Patch(os.path.join(patch_dir, patch), topic, split)
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