now really with semver checker

checksemver.py

@@ -0,0 +1,83 @@
+#!/usr/bin/python
+
+import re
+import argparse
+import sys
+
+parser = argparse.ArgumentParser(description='Semantic Version Validator')
+parser.add_argument('--versionToValidate', '-V',
+                    help='The version to validate against the semantic versioning rules', 
+                    required=True)
+parser.add_argument('--messageToValidate', '-M',
+                    help='A message to validate, means: it must not be empty', 
+                    default='',
+                    required=False)
+parser.add_argument('--validateMessage', '-m',
+                    help='Consider -M', 
+                    required=False,
+                    action='store_true',
+                    default=False)
+parser.add_argument('--printExports', '-e',
+                    help='Print exports', 
+                    action='store_true',
+                    default=False,
+                    required=False)
+parser.add_argument('--exportFormat', '-f',
+                    help='Print exports in >bash< or >powershell< format, to be used in backticks or with Invoke-Expression', 
+                    default='bash',
+                    required=False)
+parser.add_argument('--verbose', '-v',
+                    help='Verbose output, overrides -q', 
+                    required=False,
+                    action='store_true',
+                    default=False)
+args = parser.parse_args()
+
+verbose = args.verbose
+versionToValidate = args.versionToValidate
+messageToValidate = args.messageToValidate
+validateMessage = args.validateMessage
+printExports = args.printExports
+exportFormat = args.exportFormat
+
+r = re.compile('^(?P<major>0|[1-9]\d*)\.(?P<minor>0|[1-9]\d*)\.(?P<patch>0|[1-9]\d*)(?:-(?P<prerelease>(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\+(?P<buildmetadata>[0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?$')
+# r = re.compile('^(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)(?:-((?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\+([0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?$')
+
+if verbose:
+  print("Version to validate: {}".format(versionToValidate))
+
+m = r.match(versionToValidate)
+
+if m:
+  if verbose:
+    for i in r.groupindex:
+      print("Found: {}: {}".format(i, m.group(i)))
+  if validateMessage:
+    if verbose:
+      print("Checking message {}".format(messageToValidate))
+    if messageToValidate == '':
+      if verbose:
+        print("Message shall be validate and is invalid")
+      sys.exit(1)
+    else:
+      if printExports:
+        if exportFormat == "bash":
+          print("export MESSAGE={}".format(messageToValidate))
+      elif exportFormat == "powershell":
+        print("set MESSAGE {}".format(messageToValidate))
+
+  if printExports:
+    for i in r.groupindex:
+      if exportFormat == "bash":
+        print("export {}={}".format(i.upper(), '' if m.group(i) is None else m.group(i)))
+      elif exportFormat == "powershell":
+        print("set {} {}".format(i.upper(), '""' if m.group(i) is None else m.group(i)))
+
+
+  sys.exit(0)
+else:
+  if verbose:
+    print("Version is invalid")
+  sys.exit(1)
+
+