115 lines
3.2 KiB
Python
115 lines
3.2 KiB
Python
"""macresource - Locate and open the resources needed for a script."""
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from Carbon import Res
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import os
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import sys
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class ArgumentError(TypeError): pass
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class ResourceFileNotFoundError(ImportError): pass
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def need(restype, resid, filename=None, modname=None):
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"""Open a resource file, if needed. restype and resid
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are required parameters, and identify the resource for which to test. If it
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is available we are done. If it is not available we look for a file filename
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(default: modname with .rsrc appended) either in the same folder as
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where modname was loaded from, or otherwise across sys.path.
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Returns the refno of the resource file opened (or None)"""
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if modname is None and filename is None:
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raise ArgumentError, "Either filename or modname argument (or both) must be given"
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if type(resid) is type(1):
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try:
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h = Res.GetResource(restype, resid)
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except Res.Error:
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pass
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else:
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return None
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else:
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try:
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h = Res.GetNamedResource(restype, resid)
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except Res.Error:
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pass
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else:
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return None
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# Construct a filename if we don't have one
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if not filename:
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if '.' in modname:
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filename = modname.split('.')[-1] + '.rsrc'
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else:
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filename = modname + '.rsrc'
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# Now create a list of folders to search
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searchdirs = []
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if modname == '__main__':
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# If we're main we look in the current directory
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searchdirs = [os.curdir]
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if sys.modules.has_key(modname):
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mod = sys.modules[modname]
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if hasattr(mod, '__file__'):
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searchdirs = [os.path.split(mod.__file__)[0]]
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if not searchdirs:
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searchdirs = sys.path
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# And look for the file
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for dir in searchdirs:
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pathname = os.path.join(dir, filename)
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if os.path.exists(pathname):
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break
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else:
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raise ResourceFileNotFoundError, filename
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refno = open_pathname(pathname)
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# And check that the resource exists now
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if type(resid) is type(1):
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h = Res.GetResource(restype, resid)
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else:
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h = Res.GetNamedResource(restype, resid)
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return refno
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def open_pathname(pathname, verbose=0):
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"""Open a resource file given by pathname, possibly decoding an
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AppleSingle file"""
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try:
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refno = Res.FSpOpenResFile(pathname, 1)
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except Res.Error, arg:
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if arg[0] in (-37, -39):
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# No resource fork. We may be on OSX, and this may be either
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# a data-fork based resource file or a AppleSingle file
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# from the CVS repository.
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try:
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refno = Res.FSOpenResourceFile(pathname, u'', 1)
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except Res.Error, arg:
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if arg[0] != -199:
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# -199 is "bad resource map"
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raise
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else:
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return refno
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# Finally try decoding an AppleSingle file
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pathname = _decode(pathname, verbose=verbose)
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refno = Res.FSOpenResourceFile(pathname, u'', 1)
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else:
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raise
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return refno
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def open_error_resource():
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"""Open the resource file containing the error code to error message
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mapping."""
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need('Estr', 1, filename="errors.rsrc", modname=__name__)
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def _decode(pathname, verbose=0):
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# Decode an AppleSingle resource file, return the new pathname.
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newpathname = pathname + '.df.rsrc'
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if os.path.exists(newpathname) and \
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os.stat(newpathname).st_mtime >= os.stat(pathname).st_mtime:
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return newpathname
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if verbose:
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print 'Decoding', pathname
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import applesingle
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applesingle.decode(pathname, newpathname, resonly=1)
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return newpathname
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