/usr/share/pyshared/pyx/filelocator.py is in python-pyx 0.12.1-2.
This file is owned by root:root, with mode 0o644.
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#
#
# Copyright (C) 2011 Jörg Lehmann <joergl@users.sourceforge.net>
# Copyright (C) 2009-2011 André Wobst <wobsta@users.sourceforge.net>
#
# This file is part of PyX (http://pyx.sourceforge.net/).
#
# PyX 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.
#
# PyX 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 PyX; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
builtinopen = open
import os, cStringIO, warnings, pkgutil
import config, pycompat
try:
import pykpathsea as pykpathsea_module
has_pykpathsea = True
except ImportError:
has_pykpathsea = False
# Locators implement an open method which returns a list of functions
# by searching for a file according to a specific rule. Each of the functions
# returned can be called (multiple times) and return an open file. The
# opening of the file might fail with a IOError which indicates, that the
# file could not be found at the given location.
# names is a list of kpsewhich format names to be used for searching where as
# extensions is a list of file extensions to be tried (including the dot). Note
# that the list of file extenions should include an empty string to not add
# an extension at all.
locator_classes = {}
class local:
"""locates files in the current directory"""
def openers(self, filename, names, extensions, mode):
return [lambda: builtinopen(filename+extension, mode) for extension in extensions]
locator_classes["local"] = local
class internal_pkgutil:
"""locates files within the PyX data tree (via pkgutil)"""
def openers(self, filename, names, extensions, mode):
for extension in extensions:
full_filename = filename+extension
dir = os.path.splitext(full_filename)[1][1:]
try:
data = pkgutil.get_data("pyx", "data/%s/%s" % (dir, full_filename))
except IOError:
pass
else:
if data:
# ignoring mode?!
return [lambda: cStringIO.StringIO(data)]
return []
class internal_open:
"""locates files within the PyX data tree (via an open relative to the path of this file)"""
def openers(self, filename, names, extensions, mode):
result = []
for extension in extensions:
full_filename = filename+extension
dir = os.path.splitext(full_filename)[1][1:]
result.append(lambda: builtinopen(os.path.join(os.path.dirname(__file__), "data", dir, full_filename), mode))
return result
try:
pkgutil.get_data
except AttributeError:
locator_classes["internal"] = internal_open # fallback for python < 2.6
else:
locator_classes["internal"] = internal_pkgutil
class recursivedir:
"""locates files by searching recursively in a list of directories"""
def __init__(self):
self.dirs = config.getlist("locator", "recursivedir")
self.full_filenames = {}
def openers(self, filename, names, extensions, mode):
for extension in extensions:
if filename+extension in self.full_filenames:
return [lambda: builtinopen(self.full_filenames[filename], mode)]
while self.dirs:
dir = self.dirs.pop(0)
for item in os.listdir(dir):
full_item = os.path.join(dir, item)
if os.path.isdir(full_item):
self.dirs.insert(0, full_item)
else:
self.full_filenames[item] = full_item
for extension in extensions:
if filename+extension in self.full_filenames:
return [lambda: builtinopen(self.full_filenames[filename], mode)]
return []
locator_classes["recursivedir"] = recursivedir
class ls_R:
"""locates files by searching a list of ls-R files"""
def __init__(self):
self.ls_Rs = config.getlist("locator", "ls-R")
self.full_filenames = {}
def openers(self, filename, names, extensions, mode):
while self.ls_Rs and not any([filename+extension in self.full_filenames for extension in extensions]):
lsr = self.ls_Rs.pop(0)
base_dir = os.path.dirname(lsr)
dir = None
first = True
for line in builtinopen(lsr):
line = line.rstrip()
if first and line.startswith("%"):
continue
first = False
if line.endswith(":"):
dir = os.path.join(base_dir, line[:-1])
elif line:
self.full_filenames[line] = os.path.join(dir, line)
for extension in extensions:
if filename+extension in self.full_filenames:
def _opener():
try:
return builtinopen(self.full_filenames[filename+extension], mode)
except IOError:
warnings.warn("'%s' should be available at '%s' according to the ls-R file, "
"but the file is not available at this location; "
"update your ls-R file" % (filename, self.full_filenames[filename]))
return [_opener]
return []
locator_classes["ls-R"] = ls_R
class pykpathsea:
"""locate files by pykpathsea (a C extension module wrapping libkpathsea)"""
def openers(self, filename, names, extensions, mode):
if not has_pykpathsea:
return []
for name in names:
full_filename = pykpathsea_module.find_file(filename, name)
if full_filename:
break
else:
return []
def _opener():
try:
return builtinopen(full_filename, mode)
except IOError:
warnings.warn("'%s' should be available at '%s' according to libkpathsea, "
"but the file is not available at this location; "
"update your kpsewhich database" % (filename, full_filename))
return [_opener]
locator_classes["pykpathsea"] = pykpathsea
# class libkpathsea:
# """locate files by libkpathsea using ctypes"""
#
# def openers(self, filename, names, extensions, mode):
# raise NotImplemented
#
# locator_classes["libpathsea"] = libkpathsea
class kpsewhich:
"""locate files using the kpsewhich executable"""
def openers(self, filename, names, extensions, mode):
for name in names:
try:
full_filenames = pycompat.popen('kpsewhich --format="%s" "%s"' % (name, filename)).read()
except OSError:
return []
if full_filenames:
break
else:
return []
full_filename = full_filenames.split("\n")[0].rstrip("\r")
def _opener():
try:
return builtinopen(full_filename, mode)
except IOError:
warnings.warn("'%s' should be available at '%s' according to kpsewhich, "
"but the file is not available at this location; "
"update your kpsewhich database" % (filename, full_filename))
return [_opener]
locator_classes["kpsewhich"] = kpsewhich
class locate:
"""locate files using a locate executable"""
def openers(self, filename, names, extensions, mode):
for extension in extensions:
full_filenames = pycompat.popen("locate \"%s\"" % (filename+extension)).read()
if full_filenames:
break
else:
return []
full_filename = full_filenames.split("\n")[0].rstrip("\r")
def _opener():
try:
return builtinopen(full_filenames, mode)
except IOError:
warnings.warn("'%s' should be available at '%s' according to the locate, "
"but the file is not available at this location; "
"update your locate database" % (filename, self.full_filenames[filename]))
return [_opener]
locator_classes["locate"] = locate
def init():
global methods, opener_cache
methods = [locator_classes[method]()
for method in config.getlist("filelocator", "methods", ["local", "internal", "pykpathsea", "kpsewhich"])]
opener_cache = {}
def open(filename, formats, mode="r"):
"""returns an open file searched according the list of formats"""
# When using an empty list of formats, the names list is empty
# and the extensions list contains an empty string only. For that
# case some locators (notably local and internal) return an open
# function for the requested file whereas other locators might not
# return anything (like pykpathsea and kpsewhich).
# This is useful for files not to be searched in the latex
# installation at all (like lfs files).
extensions = pycompat.set([""])
for format in formats:
for extension in format.extensions:
extensions.add(extension)
names = tuple([format.name for format in formats])
if (filename, names) in opener_cache:
return opener_cache[(filename, names)]()
for method in methods:
openers = method.openers(filename, names, extensions, mode)
for opener in openers:
try:
file = opener()
except IOError:
file = None
if file:
opener_cache[(filename, names)] = opener
return file
raise IOError("Could not locate the file '%s'." % filename)
class format:
def __init__(self, name, extensions):
self.name = name
self.extensions = extensions
format.tfm = format("tfm", [".tfm"])
format.afm = format("afm", [".afm"])
format.fontmap = format("map", [])
format.pict = format("graphic/figure", [".eps", ".epsi"])
format.tex_ps_header = format("PostScript header", [".pro"]) # contains also: enc files
format.type1 = format("type1 fonts", [".pfa", ".pfb"])
format.vf = format("vf", [".vf"])
format.dvips_config = format("dvips config", [])
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