git-gui: Misc. nit type of bug fixes.

* Make sure we are in the top level working directory.  This
way we can access files using their repository path.

* Reload the diff viewer if the current file's status has changed;
as the diff may now be different.

* Correctly handle the 'AD' file state: added but now gone from
the working directory.

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

diff --git a/git-gui b/git-gui
index bb89da43320ed53b819fa9f973c6cdaaf8783128..8ad3f2d033d29b47471c89f28dc44b8e912e8805 100755 (executable)
--- a/git-gui
+++ b/git-gui
@@ -266,6 +266,9 @@ proc show_diff {path} {
                $ui_diff conf -state normal
                $ui_diff insert end $content
                $ui_diff conf -state disabled
+               set diff_active 0
+               unlock_index
+               set ui_status_value {Ready.}
                return
        }
        }
@@ -482,8 +485,7 @@ A good commit message has the following format:
        set ui_status_value {Committing changes...}
 
        set fd_wt [open "| git write-tree" r]
-       fileevent $fd_wt readable \
-               [list commit_stage2 $fd_wt $curHEAD $msg]
+       fileevent $fd_wt readable [list commit_stage2 $fd_wt $curHEAD $msg]
 }
 
 proc commit_stage2 {fd_wt curHEAD msg} {
@@ -510,8 +512,8 @@ proc commit_stage2 {fd_wt curHEAD msg} {
        if {$commit_type == {merge}} {
                if {[catch {
                                set fd_mh [open [file join $gitdir MERGE_HEAD] r]
-                               while {[gets $fd_mh merge_head] > 0} {
-                                       lappend -p $merge_head
+                               while {[gets $fd_mh merge_head] >= 0} {
+                                       lappend cmd -p $merge_head
                                }
                                close $fd_mh
                        } err]} {
@@ -576,6 +578,8 @@ proc commit_stage2 {fd_wt curHEAD msg} {
 
        set commit_type {}
        set commit_active 0
+       set HEAD $cmt_id
+       set PARENT $cmt_id
        unlock_index
        update_status "Changes committed as $cmt_id."
 }
@@ -739,7 +743,7 @@ proc update_index {path} {
 }
 
 proc toggle_mode {path} {
-       global file_states
+       global file_states ui_fname_value
 
        set s $file_states($path)
        set m [lindex $s 0]
@@ -749,12 +753,16 @@ proc toggle_mode {path} {
        _O {set new A*}
        _M -
        MM {set new M*}
+       AD -
        _D {set new D*}
        default {return}
        }
 
        with_update_index {update_index $path}
        display_file $path $new
+       if {$ui_fname_value == $path} {
+               show_diff $path
+       }
 }
 
 ######################################################################
@@ -843,6 +851,7 @@ foreach i {
                {_O o plain    "Untracked"}
                {A_ o fulltick "Added"}
                {AM o parttick "Partially added"}
+               {AD o question  "Added (but now gone)"}
 
                {_D i question "Missing"}
                {D_ i removed  "Removed"}
@@ -1261,10 +1270,18 @@ lappend disable_on_lock {.vpane.commarea.buttons.commit conf -state}
 # -- Commit Message Buffer
 frame .vpane.commarea.buffer
 set ui_comm .vpane.commarea.buffer.t
-label .vpane.commarea.buffer.l -text {Commit Message:} \
+set ui_coml .vpane.commarea.buffer.l
+label $ui_coml -text {Commit Message:} \
        -anchor w \
        -justify left \
        -font $mainfont
+trace add variable commit_type write {uplevel #0 {
+       switch -glob $commit_type \
+       initial {$ui_coml conf -text {Initial Commit Message:}} \
+       amend   {$ui_coml conf -text {Amended Commit Message:}} \
+       merge   {$ui_coml conf -text {Merge Commit Message:}} \
+       *       {$ui_coml conf -text {Commit Message:}}
+}}
 text $ui_comm -background white -borderwidth 1 \
        -relief sunken \
        -width 75 -height 10 -wrap none \
@@ -1272,7 +1289,7 @@ text $ui_comm -background white -borderwidth 1 \
        -yscrollcommand {.vpane.commarea.buffer.sby set} \
        -cursor $maincursor
 scrollbar .vpane.commarea.buffer.sby -command [list $ui_comm yview]
-pack .vpane.commarea.buffer.l -side top -fill x
+pack $ui_coml -side top -fill x
 pack .vpane.commarea.buffer.sby -side right -fill y
 pack $ui_comm -side left -fill y
 pack .vpane.commarea.buffer -side left -fill y
@@ -1315,6 +1332,11 @@ if {[catch {set gitdir [exec git rev-parse --git-dir]} err]} {
        show_msg {} . "Cannot find the git directory: $err"
        exit 1
 }
+set cdup [exec git rev-parse --show-cdup]
+if {$cdup != ""} {
+       cd $cdup
+}
+unset cdup
 
 set appname [lindex [file split $argv0] end]
 if {$appname == {git-citool}} {