Fix exception causes in cmd.py

cool-RR · Byron · commit 4720e6337bb1 · 2020-06-12T22:51:35.000+08:00
diff --git a/git/cmd.py b/git/cmd.py
@@ -83,7 +83,7 @@ def pump_stream(cmdline, name, stream, is_decode, handler):
 handler(line)
 except Exception as ex:
 log.error("Pumping %r of cmd(%s) failed due to: %r", name, cmdline, ex)
- raise CommandError(['<%s-pump>' % name] + cmdline, ex)
+ raise CommandError(['<%s-pump>' % name] + cmdline, ex) from ex
 finally:
 stream.close()
 
@@ -732,7 +732,7 @@ def execute(self, command,
 **subprocess_kwargs
 )
 except cmd_not_found_exception as err:
- raise GitCommandNotFound(command, err)
+ raise GitCommandNotFound(command, err) from err
 
 if as_process:
 return self.AutoInterrupt(proc, command)
@@ -982,9 +982,9 @@ def _call_process(self, method, *args, **kwargs):
 else:
 try:
 index = ext_args.index(insert_after_this_arg)
- except ValueError:
+ except ValueError as err:
 raise ValueError("Couldn't find argument '%s' in args %s to insert cmd options after"
- % (insert_after_this_arg, str(ext_args)))
+ % (insert_after_this_arg, str(ext_args))) from err
 # end handle error
 args = ext_args[:index + 1] + opt_args + ext_args[index + 1:]
 # end handle opts_kwargs

-Original file line number
+Diff line change
 handler(line)
 exceptExceptionasex:
 log.error("Pumping %r of cmd(%s) failed due to: %r", name, cmdline, ex)
 -raiseCommandError(['<%s-pump>'%name] +cmdline, ex)
 +raiseCommandError(['<%s-pump>'%name] +cmdline, ex)fromex
 finally:
 stream.close()
 **subprocess_kwargs
+ )
 exceptcmd_not_found_exceptionaserr:
 -raiseGitCommandNotFound(command, err)
 +raiseGitCommandNotFound(command, err)fromerr
 ifas_process:
 returnself.AutoInterrupt(proc, command)
 else:
 try:
 index=ext_args.index(insert_after_this_arg)
 -exceptValueError:
 +exceptValueErroraserr:
 raiseValueError("Couldn't find argument '%s' in args %s to insert cmd options after"
 -% (insert_after_this_arg, str(ext_args)))
 +% (insert_after_this_arg, str(ext_args)))fromerr
 # end handle error
 args=ext_args[:index+1] +opt_args+ext_args[index+1:]
 # end handle opts_kwargs