Re: cygwin git and golang: how @{u} is handled

> From: "John Cheng" <johnlicheng@gmail.com>
>
>> I am experiencing a strange behavior and I'm not certain if it is a
>> problem with golang or the cygwin version of git.
>>
>> Steps to reproduce:
>> Use golang's os/exec library to execute
>> exec.Command(os.Args[1],"log","@{u}") // where os.Args[1] is either
>> cygwin git or Windows git
>>
>> Expected result:
>> commit 09357db3a29909c3498143b0d06989e00f5e2442
>> Author: John Cheng <johnlicheng@gmail.com>
>> Date:   Sun Jan 14 10:57:01 2018 -0800
>> ...
>>
>> Actual result:
>> Suppose that cygwin git is specified, the result becomes:
>> exit status 128 fatal: ambiguous argument '@u': unknown revision or
>> path not in the working tree.
>>
>> Version:
>> git version 2.15.1.windows.2
>> git version 2.15.1
>>
>> I'm not certain if this is a git problem, as I could not reproduce
>> this problem using python to script cygwin git.
>>
>> A list of scenarios I've tested are
>> 1. golang + cygwin git = "exit code 128"
>> 2. golang + windows git = "exit code 0"
>> 3. python + cygwin git = "exit code 0"
>> 4. python + windows git = "exit code 0"
>>
>> I've tried to write a simple program to echo the command line
>> parameters passed by go into the process it executes - and it appears
>> that go itself does not change "@{u}" into "@u". I'm a bit stuck at
>> point to figure out which may be the cause: golang or git. I figured
>> I'd start here.
>>
> There is a similar problem a user is experiencing on Git-for-Windows, that
> we/the user haven't got to the bottom of, but it appears to have a similar
> form where the braces appear to be is some form parsed twice (though thats
> still a guess / hypothesis).
>
> "Aliases in git are stripping curly-brackets (#1220)"
> https://github.com/git-for-windows/git/issues/1220#issuecomment-340341336
>
>
>
> Philip
>