From c75af8b28602813cf218ba38977bc3664ed0d51b Mon Sep 17 00:00:00 2001 From: Stefan Huber Date: Mon, 14 May 2012 09:12:42 +0200 Subject: [PATCH] Better error handling --- shbackup | 40 ++++++++++++++++++++++------------------ 1 file changed, 22 insertions(+), 18 deletions(-) diff --git a/shbackup b/shbackup index db2c661..cbd5396 100755 --- a/shbackup +++ b/shbackup @@ -52,9 +52,11 @@ class Backup: class Config: """Encapsules the configuration for the backup program.""" - class ReadException(Exception): + class ReadError(RuntimeError): """An exception raised when reading configurations.""" - pass + def __init__(self, value): + self.value = value + self.message = value class FileSet: """A fileset has a name and a list of directories.""" @@ -92,20 +94,22 @@ class Config: """Read configuration from file""" if not os.path.isfile(filename): - raise Config.ReadException("No file '" + filename + "'.") + raise Config.ReadError("Cannot read config file '" + filename + "'.") config = configparser.RawConfigParser() config.read(filename) for reqsec in ["destination"]: if not config.has_section(reqsec): - raise Config.ReadException("Section '" + reqsec + "' is missing.") + raise Config.ReadError("Section '" + reqsec + "' is missing.") self.directory = config.get("destination", "directory") + if not os.path.isdir(self.directory): + raise Config.ReadError("Directory '{0}' does not exist.".format(self.directory)) self.format = config.get("destination", "format") if not self.format in Config.formats: - raise Config.ReadException("Invalid 'format' given.") + raise Config.ReadError("Invalid 'format' given.") if config.has_section("history"): @@ -113,24 +117,27 @@ class Config: if opt.startswith("keep"): epoch = opt[4:] if not epoch in RealEpoch.keys(): - raise Config.ReadException("Invalid option 'keep" + epoch + "'.") - self.epochkeeps[epoch] = int(config.getint("history", opt)) + raise Config.ReadError("Invalid option 'keep" + epoch + "'.") + try: + self.epochkeeps[epoch] = int(config.getint("history", opt)) + except ValueError: + raise Config.ReadError("Invalid integer given for '" + opt + "'.") elif opt.startswith("mode"): epoch = opt[4:] if not epoch in RealEpoch.keys(): - raise Config.ReadException("Invalid option 'mode" + epoch + "'.") + raise Config.ReadError("Invalid option 'mode" + epoch + "'.") self.epochmodes[epoch] = config.get("history", opt) if not self.epochmodes[epoch] in Mode: - raise Config.ReadException("Invalid mode given.") + raise Config.ReadError("Invalid mode given.") else: - raise Config.ReadException("Invalid option '" + opt + "'.") + raise Config.ReadError("Invalid option '" + opt + "'.") if config.has_section("input"): for opt in config.options("input"): if opt.startswith("exclude"): self.exclpatterns += [ config.get("input", opt) ] else: - raise Config.ReadException("Invalid option '" + opt + "'.") + raise Config.ReadError("Invalid option '" + opt + "'.") for sec in config.sections(): if sec in ["destination", "history", "input"]: @@ -141,12 +148,12 @@ class Config: for opt in config.options(sec): if not opt.startswith("dir"): - raise Config.ReadException("Unknown option '" + opt + "'.") + raise Config.ReadError("Unknown option '" + opt + "'.") else: dirs += [config.get(sec, opt)] self.sets += [Config.FileSet(name, dirs)] else: - raise Config.ReadException("Unknown section '" + sec + "'.") + raise Config.ReadError("Unknown section '" + sec + "'.") # Compute checksum of config file m = hashlib.sha1() @@ -428,11 +435,8 @@ if __name__ == "__main__": if cmd == "prune": man.prune() - except Config.ReadException as e: - print("Error reading config file: ", end="") - for a in e.args: - print(a, end=" ") - print() + except (Config.ReadError, configparser.DuplicateOptionError) as e: + print("Error reading config file: " + e.message) -- 2.39.5