[PATCH] Handle failure of core.worktree to identify the working directory.

[Pat Thoyts <patthoyts@users.sourceforge.net>]

Commit 21985a11 'git-gui: handle non-standard worktree locations' attempts
to use either GIT_WORK_TREE or core.worktree to set the _gitworktree
variable but these may not be set which leads to a failure to launch
gitk to review history. Use _gitdir to set the location for a standard
git layout where the parent of the .git directory is the working tree.

Signed-off-by: Pat Thoyts <patthoyts@users.sourceforge.net>
---
>Git-gui as shipped with todays git.git master is a bit broken:
>
>in git.git master (v1.7.0-29-g6d81630), try running:
>
>    $ git gui blame xdiff-interface.h
>
>Then select first line 'd9ea d9ea   1 #ifndef XDIFF_INTERFACE_H', right
>click to popup context menu, select "Show History Context" -->
>
>--> git gui errors with:
>
>    "Error: couldn't change working directory to "": no ...
>
>
>Thanks,
>Kirill

 git-gui.sh |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/git-gui.sh b/git-gui.sh
index 8996d2d..ec81b15 100755
--- a/git-gui.sh
+++ b/git-gui.sh
@@ -1158,6 +1158,9 @@ apply_config
 # try to set work tree from environment, falling back to core.worktree
 if {[catch { set _gitworktree $env(GIT_WORK_TREE) }]} {
 	set _gitworktree [get_config core.worktree]
+	if {$_gitworktree eq ""} {
+		set _gitworktree [file dirname [file normalize $_gitdir]]
+	}
 }
 if {$_prefix ne {}} {
 	if {$_gitworktree eq {}} {
-- 
1.6.5.1.1367.gcd48


-- 
Pat Thoyts                            http://www.patthoyts.tk/
PGP fingerprint 2C 6E 98 07 2C 59 C8 97  10 CE 11 E6 04 E0 B9 DD