class CommitTag:
    def __init__(self, completeTag):
        if not ("tag: " in completeTag):
            self.completeTag = None
            self.tagAsString = None
            self.major = None
            self.minor = None
            self.bugfix = None
        else:
            self.completeTag = completeTag
            self.setTagAsString()
            self.setMajorMinorBugfix()

    def setTagAsString(self):
        """set only the version number from tag as string"""
        try:
            self.tagAsString = self.completeTag[(self.completeTag.rindex(": v.")+4):-1]
        except:
            try:
                self.tagAsString = self.completeTag[(self.completeTag.rindex(": v")+3):-1]
            except:
                self.tagAsString = self.completeTag[(self.completeTag.rindex(": ")+2):-1]