tree 8d68b72b2f7875d4f52de0876dedecde71079735
parent e87fb0f1b4a4b458394a65d664145a9a8001e821
author Shawn O. Pearce <spearce@spearce.org> 1184221888 -0400
committer Shawn O. Pearce <spearce@spearce.org> 1184222294 -0400

git-gui: Work around bad interaction between Tcl and cmd.exe on ^{tree}

From Johannes Sixt <J.Sixt@eudaptics.com>:
> It seems that MSYS's wish does some quoting for Bourne shells,
> in particular, escape the first '{' of the "^{tree}" suffix, but
> then it uses cmd.exe to run "git rev-parse". However, cmd.exe does
> not remove the backslash, so that the resulting rev expression
> ends up in git's guts as unrecognizable garbage: rev-parse fails,
> and git-gui hickups in a way that it must be restarted.

Johannes originally submitted a patch to this section of commit.tcl
to use `git rev-parse $PARENT:`, but not all versions of Git will
accept that format.  So I'm just taking the really simple approach
here of scanning the first line of the commit to grab its tree.
About the same cost, but works everywhere.

Signed-off-by: Shawn O. Pearce <spearce@spearce.org>