csbackgen, csfile: capture regex syntax errors

csbackgen.py

@@ -39,6 +39,7 @@
 # 28/02/2013  V0.7    improve error handling; use error codes
 # 26/10/2013  V0.8    dry-run flag introduced
 # 09/11/2013  V0.8.1  adjusted help text
+# 01/08/2019  V0.8.2  (thof): provide additional debug output
 # 
 # =============================================================================
  
@@ -294,6 +295,7 @@ def main(argv=None):
     # generate checksumfiles for subdirectories (recursive mode)
     # so collect all available subdirectories here (excluding subdirectories)
     if not notRecursive:
+      logger.getLogger().debug("collect subdirectories\n  srcpath: %s\n  regexes: %s\n  followlinks: %s" % (srcpath, regexes, followlinks))
       dirs.extend(csfile.getSubDirectories(srcpath, regexes, followlinks))
       # if a target directory had been passed extend the list of
       # target directories replacing the trunk of the source directory with the

csfile.py

@@ -51,6 +51,8 @@
 #                     files based on time stamp values) for open time windows
 #                     (like all younger than 3 days), we use datetime.max as
 #                     the end time
+# 01/08/2019  V0.6.6  (thof) let getSubDirectories produce a reasonable error
+#                     message, if application of a regex fails
 #
 # =============================================================================
 """ CsFile module to handle checksumfiles. """
@@ -68,7 +70,7 @@ from datetime import date
 import csbacklog
 import csbackErrorCodes as eCodes
 
-__version__ = "V0.6.5"
+__version__ = "V0.6.6"
 __subversion__ = "$Id$"
 __license__ = "GPLv2+"
 __author__ = "Daniel Armbruster"
@@ -102,7 +104,10 @@ def getSubDirectories(path, regexes, followLinks=False):
         subDirs.add(os.path.join(root, dir))
     # exclude directories matching regexes
     for regex in regexes:
-      matching = set(dir for dir in subDirs if None != re.match(regex, dir))
+      try:
+	matching = set(dir for dir in subDirs if None != re.match(regex, dir))
+      except:
+        raise CsFileError("application of exclude regex %s failed!" % regex, eCodes.CSFILE_CollectingSubDirs)
       subDirs -= matching
   except OSError as err:
     raise CsFileError("[Errno "+str(err.errno)+"] "+err.strerror+": " \