more tweaks in module-tools.py for tagging plcapi + plewww

diff --cc module-tools.py
index 30c527e,e9f3096..7678bdc
--- 1/module-tools.py
--- 2/module-tools.py
+++ b/module-tools.py
@@@ -109,7 -109,7 +109,7 @@@ class Command
              raise Exception("Command {} failed".format(self.command))
  
      # returns stdout, like bash's $(mycommand)
--    def output_of(self, with_stderr=False):
++    def output_of(self, with_stderr=False, binary=False):
          if self.options.dry_run:
              print('dry_run', self.command)
              return 'dry_run output'
@@@ -124,7 -124,7 +124,8 @@@
              command += " > "
          command += tmp
          os.system(command)
--        with open(tmp) as f:
++        mode = "r" if not binary else "rb"
++        with open(tmp, mode) as f:
              result=f.read()
          os.unlink(tmp)
          if self.options.debug:
@@@ -223,11 -223,11 +224,17 @@@ class GitRepository
  
      def diff(self, f=""):
          c = Command("git diff {}".format(f), self.options)
--        return self.__run_in_repo(c.output_of, with_stderr=True)
++        try:
++            return self.__run_in_repo(c.output_of, with_stderr=True)
++        except:
++            return self.__run_in_repo(c.output_of, with_stderr=True, binary=True)
  
      def diff_with_tag(self, tagname):
          c = Command("git diff {}".format(tagname), self.options)
--        return self.__run_in_repo(c.output_of, with_stderr=True)
++        try:
++            return self.__run_in_repo(c.output_of, with_stderr=True)
++        except:
++            return self.__run_in_repo(c.output_of, with_stderr=True, binary=True)
  
      def commit(self, logfile, branch="master"):
          self.__run_command_in_repo("git add .", ignore_errors=True)
@@@ -237,7 -237,7 +244,7 @@@
              self.__run_command_in_repo("git push")
          else:
              self.__run_command_in_repo("git push origin {}:{}".format(branch, branch))
--        self.__run_command_in_repo("git push --tags")
++        self.__run_command_in_repo("git push --tags", ignore_errors=True)
  
      def revert(self, f=""):
          if f: