Re: Git Gui: Branch->create currently fails...

[Pratyush Yadav <me@yadavpratyush.com>]

On 07/10/19 11:02PM, Philip Oakley wrote:
> I'd never used the Branch:Create before (this is via mouse) and it threw an
> error, which appears to be repeatable, so I'm reporting it at the moment so

I'm afraid I can't reproduce it. I tested by creating a worktree of 
git.git by running:

  git worktree add ../git-2

Then I opened git-gui in the worktree and clicked the "Create" option 
under the "Branch" menu.

The dialog opened just fine, which I assume is what your error is. But 
just to be sure, I created a branch too, and that also works pretty 
well.

Same behaviour with a "normal" branch, which is not inside a worktree.

So is there anything else in your setup that would cause this problem?

> I don't forget ...
> (I'm chasing down other issue at the moment ;-)
> 
> This is with the version 0.21.GI git version 2.23.0.windows.1 Tcl/Tck 8.6.9
> 
> 
> missing "
> missing "
>     while executing
> "list "refs/heads/redo-v0" [list ""
>     ("eval" body line 1)
>     invoked from within
> "eval $line"
>     (procedure "_new" line 87)
>     invoked from within
> "_new $path 0 $title"
>     (procedure "::choose_rev::new" line 2)
>     invoked from within
> "::choose_rev::new $w.rev [mc "Starting Revision"]"
>     (procedure "branch_create::dialog" line 35)
>     invoked from within
> "branch_create::dialog"
>     (menu invoke)

Looking at the log, the culprit seems to be the line:

  set line [eval $line]

over at lib/choose_rev.tcl:159. The $line comes from reading the output 
of a call to `git for-each-ref` with '--tcl' passed in. Looking at the 
man page for 'for-each-ref', the description of the option is:

  --shell, --perl, --python, --tcl
    If given, strings that substitute %(fieldname) placeholders are 
    quoted as string literals suitable for the specified host language. 
    This is meant to produce a scriptlet that
    can directly be `eval`ed.

So this might possibly me an upstream bug.

If I had to guess a fix, I'd suggest trying to wrap the $line in 
lib/choose_rev.tcl:159 in quotes like so:

  set line [eval "$line"] 

If this doesn't fix it, see if you can find out which $line is causing 
problem by printing the variable before 'eval'ing it by adding a:

  puts "$line"

before the call to eval.

-- 
Regards,
Pratyush Yadav