trepan/lib/core.py
def canonic(self, filename):
        """ Turns `filename' into its canonic representation and returns this
        string. This allows a user to refer to a given file in one of several
        equivalent ways.

        Relative filenames need to be fully resolved, since the current working
        directory might change over the course of execution.

        If filename is enclosed in < ... >, then we assume it is
        one of the bogus internal Python names like <string> which is seen
        for example when executing "exec cmd".
        """

        if filename == "<" + filename[1:-1] + ">":
            return filename
        canonic = self.filename_cache.get(filename)
        if not canonic:
            lead_dir = filename.split(os.sep)[0]
            if lead_dir == os.curdir or lead_dir == os.pardir:
                # We may have invoked the program from a directory
                # other than where the program resides. filename is
                # relative to where the program resides. So make sure
                # to use that.
                canonic = os.path.abspath(os.path.join(self.main_dirname,
                                                       filename))
            else:
                canonic = os.path.abspath(filename)
                pass
            if not os.path.isfile(canonic):
                canonic = Mclifns.search_file(filename, self.search_path,
                                              self.main_dirname)
                # FIXME: is this is right for utter failure?
                if not canonic: canonic = filename
                pass
            canonic = os.path.realpath(os.path.normcase(canonic))
            self.filename_cache[filename] = canonic
        return canonic
def canonic(self, filename):
        """ Turns `filename' into its canonic representation and returns this
        string. This allows a user to refer to a given file in one of several
        equivalent ways.

        Relative filenames need to be fully resolved, since the current working
        directory might change over the course of execution.

        If filename is enclosed in < ... >, then we assume it is
        one of the bogus internal Python names like <string> which is seen
        for example when executing "exec cmd".
        """

        if filename == "<" + filename[1:-1] + ">":
            return filename
        canonic = self.filename_cache.get(filename)
        if not canonic:
            lead_dir = filename.split(os.sep)[0]
            if lead_dir == os.curdir or lead_dir == os.pardir:
                # We may have invoked the program from a directory
                # other than where the program resides. filename is
                # relative to where the program resides. So make sure
                # to use that.
                canonic = os.path.abspath(os.path.join(self.main_dirname,
                                                       filename))
            else:
                canonic = os.path.abspath(filename)
                pass
            if not os.path.isfile(canonic):
                canonic = Mclifns.search_file(filename, self.search_path,
                                              self.main_dirname)
                # FIXME: is this is right for utter failure?
                if not canonic: canonic = filename
                pass
            canonic = os.path.realpath(os.path.normcase(canonic))
            self.filename_cache[filename] = canonic
        return canonic
Turns `filename' into its canonic representation and returns this
        string. This allows a user to refer to a given file in one of several
        equivalent ways.

        Relative filenames need to be fully resolved, since the current working
        directory might change over the course of execution.

        If filename is enclosed in < ... >, then we assume it is
        one of the bogus internal Python names like <string> which is seen
        for example when executing "exec cmd".