[PATCH] gitk: show detached HEAD if --all is specified

If HEAD is detached, 'gitk --all' does not show it. This is inconvenient
for frontend program, and for example git log does show the detached HEAD.

gitk uses git rev-parse to find a list of branches to show.
Apparently, the command does not include detached HEAD to output if
--all argument is specified. This has been discussed in [1] and stated
as expected behavior. So rev-parse's parameters should be tuned in gitk.

[1] http://thread.gmane.org/gmane.comp.version-control.git/255996

Signed-off-by: Max Kirillov <redacted>
---
 gitk | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gitk b/gitk
index c8df35d..a5d98bf 100755
--- a/gitk
+++ b/gitk

@@ -294,6 +294,8 @@ proc parseviewrevs {view revs} {
 
     if {$revs eq {}} {
 	set revs HEAD
+    } elseif {[lsearch -exact $revs --all] >= 0} {
+	lappend revs HEAD
     }
     if {[catch {set ids [eval exec git rev-parse $revs]} err]} {
 	# we get stdout followed by stderr in $err

-- 
2.0.1.1697.g73c6810