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#!/usr/bin/env python
# -*- coding: UTF-8 -*-
# Extract the PO template of XScreenSaver's hacks configurations.
# Provide the target PO template path and one or more XScreenSaver
# source distribution packages. For example:
#
# cd $SOMEWHERE/kscreensaver/kxsconfig
# ./create-hacks-pot.py hacks.pot $OTHERWHERE/xscreensaver-*.tar.gz
#
# The created hacks.pot file in the current working directory
# should then be committed.
# Try to support last 3 years of XScreenSaver releases.
#
# Chusslove Illich <caslav.ilic@gmx.net>
import sys
import os
import glob
import re
import shutil
import tarfile
import xml.parsers.expat
def main ():
if len(sys.argv) < 3:
error("Usage: %s hacks.pot xscreensaver-X.Y.tar.gz..."
% os.path.basename(sys.argv[0]))
potpath = sys.argv[1]
xsdistpaths = sys.argv[2:]
xcfgex = XSCfgExtractor()
xcfgex.extract(potpath, xsdistpaths)
def error (msg):
print "%s [error]: %s" % (os.path.basename(sys.argv[0]), msg)
sys.exit(1)
class XSCfgExtractor:
def __init__ (self):
pass
def _prepare_xml_parser (self, relpath, releaseid):
self._parser = xml.parsers.expat.ParserCreate()
self._parser.UseForeignDTD() # to ignore non-default XML entities
self._parser.StartElementHandler = self._handler_start_element
self._parser.EndElementHandler = self._handler_end_element
self._parser.CharacterDataHandler = self._handler_character_data
# Data structures used in handlers
self._element_stack = []
self._releaseid = releaseid
self._relpath = relpath
self._chardata = []
return self._parser
def extract (self, potpath, distpaths):
# Extract messages from all source packages.
self.msgs = []
tmpdir = "./xscreensaver-unpacked"
if os.path.exists(tmpdir):
shutil.rmtree(tmpdir)
os.mkdir(tmpdir)
for distpath in distpaths:
# Extract release ID from the path.
try:
distbase = os.path.basename(distpath)
p3 = distbase.rfind(".tar")
p2 = distbase.rfind(".", 0, p3 - 1)
p1 = distbase.rfind("-", 0, p2 - 1)
majver = int(distbase[p1 + 1:p2])
minver = int(distbase[p2 + 1:p3])
except:
error("Archive file name '%s' not in the form '%s'."
% (distpath, "*-X.Y.tar.*"))
releaseid = (majver, minver)
# Unpack the source package and collect paths for extraction.
tar = tarfile.open(distpath)
tar.extractall(tmpdir)
tar.close()
srcdir = glob.glob(os.path.join(tmpdir, "*"))
if len(srcdir) != 1:
error("There should be only one top-level item "
"in archive '%s'." % distpath)
srcdir = srcdir[0]
if not os.path.isdir(srcdir):
error("The top-level item in archive '%s' "
"is not a directory." % distpath)
cfgdir = os.path.join(srcdir, "hacks", "config")
cfgpaths = glob.glob(os.path.join(cfgdir, "*.xml"))
cfgpaths.sort()
# Extract messages from collected paths.
for cfgpath in cfgpaths:
# Make the path relative to source directory.
relpath = cfgpath.replace(srcdir, "", 1)
if relpath.startswith(os.path.sep):
relpath = relpath[len(os.path.sep):]
# Parse file.
p = self._prepare_xml_parser(relpath, releaseid)
fh = open(cfgpath, "r")
p.ParseFile(fh)
fh.close()
shutil.rmtree(srcdir)
shutil.rmtree(tmpdir)
# Group messages by keys, preserving order of appearance.
# Add paths only from the latest release where the message appears.
self.msgs.sort(key=lambda m: [-v for v in m[4]])
# ...sort descending by release ID, stable.
msg_keys = []
msgs_by_key = {}
newest_releaseid = (0, 0)
for msgctxt, msgid, path, lno, releaseid in self.msgs:
msgkey = "%s\x04%s" % (msgctxt, msgid)
msg = msgs_by_key.get(msgkey)
if msg is None:
msg = (msgctxt, msgid, [], releaseid)
msgs_by_key[msgkey] = msg
msg_keys.append(msgkey)
if releaseid == msg[3]:
msg[2].append((path, lno))
newest_releaseid = max(newest_releaseid, releaseid)
# Format messages into lines.
msglines = []
for msg in [msgs_by_key[x] for x in msg_keys]:
msgctxt, msgid, srcrefs, releaseid = msg
if releaseid != newest_releaseid:
msglines.append("#. last-release: %d.%d\n" % releaseid)
if srcrefs:
srcrefstrs = ["%s:%s" % x for x in srcrefs]
msglines.append("#: %s\n" % " ".join(srcrefstrs))
if msgctxt is not None:
msglines.append("msgctxt \"%s\"\n" % poescape(msgctxt))
msglines.append("msgid \"%s\"\n" % poescape(msgid))
msglines.append("msgstr \"\"\n")
msglines.append("\n")
# Write POT file.
fh = open(potpath, "w")
fh.writelines([x.encode("utf-8") for x in msglines])
fh.close()
def _handler_start_element (self, name, attrs):
self._element_stack.append((name, attrs))
self._startel_lno = self._parser.CurrentLineNumber
releaseid = self._releaseid
path = self._relpath
lno = self._startel_lno
if 0: pass
elif name == "screensaver":
msgid = attrs.get("_label")
if msgid:
ctxt = "@item screen saver name"
self.msgs.append((ctxt, msgid, path, lno, releaseid))
self._ssname_lno = lno
self._ssname_pos = len(self.msgs) - 1
elif name == "_description":
self._chardata = []
# Message created on end element.
elif name == "number":
label = attrs.get("_label")
if label:
ntype = attrs.get("type")
ctxt = None
if ntype == "slider":
ctxt = "@label:slider"
elif ntype == "spinbutton":
ctxt = "@label:spinbox"
self.msgs.append((ctxt, label, path, lno, releaseid))
for limattr in ("_low-label", "_high-label"):
limlabel = attrs.get(limattr)
if limlabel:
if label:
ctxt = "@item:inrange %s" % label
else:
ctxt = "@item:inrange"
self.msgs.append((ctxt, limlabel, path, lno, releaseid))
elif name == "boolean":
label = attrs.get("_label")
if label:
ctxt = "@option:check"
self.msgs.append((ctxt, label, path, lno, releaseid))
elif name == "string":
label = attrs.get("_label")
if label:
ctxt = "@label:textbox"
self.msgs.append((ctxt, label, path, lno, releaseid))
elif name == "file":
label = attrs.get("_label")
if label:
ctxt = "@label:chooser"
self.msgs.append((ctxt, label, path, lno, releaseid))
elif name == "select":
label = attrs.get("_label")
if label:
ctxt = "@title:group"
self.msgs.append((ctxt, label, path, lno, releaseid))
elif name == "option":
label = attrs.get("_label")
if label:
prevlabel = self._element_stack[-2][1].get("_label")
if prevlabel:
ctxt = "@option:radio %s" % prevlabel
else:
ctxt = "@option:radio"
self.msgs.append((ctxt, label, path, lno, releaseid))
#print name, attrs, self.parser.CurrentLineNumber
def _handler_end_element (self, name):
name, attr = self._element_stack.pop()
releaseid = self._releaseid
path = self._relpath
lno = self._startel_lno
if name == "_description":
text = "".join(self._chardata)
rx = re.compile(r"\s+", re.U)
text = rx.sub(" ", text.strip())
ctxt = "@info screen saver description"
if text:
# Fudge position of the message,
# to have description right after the name in the PO file.
msg = (ctxt, text, path, self._ssname_lno, releaseid)
self.msgs.insert(self._ssname_pos + 1, msg)
def _handler_character_data (self, text):
self._chardata.append(text)
def poescape (text):
text = text.replace("\"", "\\\"")
text = text.replace("\n", "\\n")
text = text.replace("\t", "\\t")
return text
if __name__ == "__main__":
main()
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