Christian Brabandt wrote:
> Bram,
> I maintain the popular eye-candy plugin vim-airline. For files
> maintained in git, it checks the current branch and displays it in the
> statusline using system('git status...') and caches the result, so that
> it is not called to often. However after a ShellCmdPost autocommand, it
> invalidates the cache and runs the command to update it (since the user
> could have interacted with git using !git..)
>
> However, calling system() after the ShellCmdPost means, that it will
> overwrite v:shell_error and that means, that a user cannot check the
> result properly, e.g. executing :! false followed by echo v:shell_error
> will return 0 instead of 1 as expected.
>
> Therefore, could we please make v:shell_error writable, so that the
> plugin can save and restore the old value and not interact with the
> return code of a shell command as expected?
>
> Attached is a patch, that would allow that. Please include.
Hmm, I hope we don't end up making all variables read-write.
Can we add a remark in the docs that it's writable only to be able to
save & restore it?
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