git-gui: Label the uncommitted blame history entry

If the user runs the blame viewer on a working directory file
instead of a specific commit-ish then we have no value for the
commit SHA1 or the summary line; this causes the history menu
to get an empty entry at the very bottom.  We now look for this
odd case and call the meny entry "Working Directory".

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

diff --git a/lib/blame.tcl b/lib/blame.tcl
index d8d27c9cbf31fda84024bd4060a795c7d720ba6e..0561fb491d24bfee649f938060cdf4cc26dd5672 100644 (file)
--- a/lib/blame.tcl
+++ b/lib/blame.tcl
@@ -370,6 +370,8 @@ method _history_menu {} {
 
                if {[regexp {^[0-9a-f]{40}$} $c]} {
                        set t [string range $c 0 8]...
+               } elseif {$c eq {}} {
+                       set t {Working Directory}
                } else {
                        set t $c
                }