git-gui: Added support for pulling from default branch of a remote.
[gitweb.git] / git-gui
diff --git a/git-gui b/git-gui
index 0b941c3ffb8a320e0e8c86413d7a3463d71c51ba..4aa035a6c4536d266f21ec41d131ecbd9651fe6f 100755 (executable)
--- a/git-gui
+++ b/git-gui
@@ -11,14 +11,20 @@ exec wish "$0" -- "$@"
 ##
 ## task management
 
+set single_commit 0
 set status_active 0
 set diff_active 0
 set checkin_active 0
+set commit_active 0
 set update_index_fd {}
 
 set disable_on_lock [list]
 set index_lock_type none
 
+set HEAD {}
+set PARENT {}
+set commit_type {}
+
 proc lock_index {type} {
        global index_lock_type disable_on_lock
 
@@ -48,13 +54,36 @@ proc unlock_index {} {
 ##
 ## status
 
-proc update_status {} {
-       global gitdir HEAD commit_type
+proc repository_state {hdvar ctvar} {
+       global gitdir
+       upvar $hdvar hd $ctvar ct
+
+       if {[catch {set hd [exec git rev-parse --verify HEAD]}]} {
+               set ct initial
+       } elseif {[file exists [file join $gitdir MERGE_HEAD]]} {
+               set ct merge
+       } else {
+               set ct normal
+       }
+}
+
+proc update_status {{final Ready.}} {
+       global HEAD PARENT commit_type
        global ui_index ui_other ui_status_value ui_comm
        global status_active file_states
 
        if {$status_active || ![lock_index read]} return
 
+       repository_state new_HEAD new_type
+       if {$commit_type == {amend} 
+               && $new_type == {normal}
+               && $new_HEAD == $HEAD} {
+       } else {
+               set HEAD $new_HEAD
+               set PARENT $new_HEAD
+               set commit_type $new_type
+       }
+
        array unset file_states
        foreach w [list $ui_index $ui_other] {
                $w conf -state normal
@@ -62,14 +91,8 @@ proc update_status {} {
                $w conf -state disabled
        }
 
-       if {[catch {set HEAD [exec git rev-parse --verify HEAD]}]} {
-               set commit_type initial
-       } else {
-               set commit_type normal
-       }
-
        if {![$ui_comm edit modified]
-           || [string trim [$ui_comm get 0.0 end]] == {}} {
+               || [string trim [$ui_comm get 0.0 end]] == {}} {
                if {[load_message GITGUI_MSG]} {
                } elseif {[load_message MERGE_MSG]} {
                } elseif {[load_message SQUASH_MSG]} {
@@ -81,11 +104,11 @@ proc update_status {} {
        set ui_status_value {Refreshing file status...}
        set fd_rf [open "| git update-index -q --unmerged --refresh" r]
        fconfigure $fd_rf -blocking 0 -translation binary
-       fileevent $fd_rf readable [list read_refresh $fd_rf]
+       fileevent $fd_rf readable [list read_refresh $fd_rf $final]
 }
 
-proc read_refresh {fd} {
-       global gitdir HEAD commit_type
+proc read_refresh {fd final} {
+       global gitdir PARENT commit_type
        global ui_index ui_other ui_status_value ui_comm
        global status_active file_states
 
@@ -102,27 +125,27 @@ proc read_refresh {fd} {
 
        set status_active 3
        set ui_status_value {Scanning for modified files ...}
-       set fd_di [open "| git diff-index --cached -z $HEAD" r]
+       set fd_di [open "| git diff-index --cached -z $PARENT" r]
        set fd_df [open "| git diff-files -z" r]
        set fd_lo [open $ls_others r]
 
        fconfigure $fd_di -blocking 0 -translation binary
        fconfigure $fd_df -blocking 0 -translation binary
        fconfigure $fd_lo -blocking 0 -translation binary
-       fileevent $fd_di readable [list read_diff_index $fd_di]
-       fileevent $fd_df readable [list read_diff_files $fd_df]
-       fileevent $fd_lo readable [list read_ls_others $fd_lo]
+       fileevent $fd_di readable [list read_diff_index $fd_di $final]
+       fileevent $fd_df readable [list read_diff_files $fd_df $final]
+       fileevent $fd_lo readable [list read_ls_others $fd_lo $final]
 }
 
 proc load_message {file} {
        global gitdir ui_comm
 
        set f [file join $gitdir $file]
-       if {[file exists $f]} {
+       if {[file isfile $f]} {
                if {[catch {set fd [open $f r]}]} {
                        return 0
                }
-               set content [read $fd]
+               set content [string trim [read $fd]]
                close $fd
                $ui_comm delete 0.0 end
                $ui_comm insert end $content
@@ -131,7 +154,7 @@ proc load_message {file} {
        return 0
 }
 
-proc read_diff_index {fd} {
+proc read_diff_index {fd final} {
        global buf_rdi
 
        append buf_rdi [read $fd]
@@ -142,10 +165,10 @@ proc read_diff_index {fd} {
                        display_file $p [string index $m end]_
                }
        }
-       status_eof $fd buf_rdi
+       status_eof $fd buf_rdi $final
 }
 
-proc read_diff_files {fd} {
+proc read_diff_files {fd final} {
        global buf_rdf
 
        append buf_rdf [read $fd]
@@ -156,10 +179,10 @@ proc read_diff_files {fd} {
                        display_file $p _[string index $m end]
                }
        }
-       status_eof $fd buf_rdf
+       status_eof $fd buf_rdf $final
 }
 
-proc read_ls_others {fd} {
+proc read_ls_others {fd final} {
        global buf_rlo
 
        append buf_rlo [read $fd]
@@ -168,21 +191,25 @@ proc read_ls_others {fd} {
        foreach p [lrange $pck 0 end-1] {
                display_file $p _O
        }
-       status_eof $fd buf_rlo
+       status_eof $fd buf_rlo $final
 }
 
-proc status_eof {fd buf} {
+proc status_eof {fd buf final} {
        global status_active $buf
-       global ui_fname_value ui_status_value
+       global ui_fname_value ui_status_value file_states
 
        if {[eof $fd]} {
                set $buf {}
                close $fd
                if {[incr status_active -1] == 0} {
                        unlock_index
-                       set ui_status_value {Ready.}
-                       if {$ui_fname_value != {}} {
+
+                       set ui_status_value $final
+                       if {$ui_fname_value != {} && [array names file_states \
+                               -exact $ui_fname_value] != {}}  {
                                show_diff $ui_fname_value
+                       } else {
+                               clear_diff
                        }
                }
        }
@@ -203,7 +230,7 @@ proc clear_diff {} {
 }
 
 proc show_diff {path} {
-       global file_states HEAD diff_3way diff_active
+       global file_states PARENT diff_3way diff_active
        global ui_diff ui_fname_value ui_fstatus_value ui_status_value
 
        if {$diff_active || ![lock_index read]} return
@@ -217,12 +244,12 @@ proc show_diff {path} {
        set ui_fstatus_value [mapdesc $m $path]
        set ui_status_value "Loading diff of $path..."
 
-       set cmd [list | git diff-index -p $HEAD -- $path]
+       set cmd [list | git diff-index -p $PARENT -- $path]
        switch $m {
        AM {
        }
        MM {
-               set cmd [list | git diff-index -p -c $HEAD $path]
+               set cmd [list | git diff-index -p -c $PARENT $path]
        }
        _O {
                if {[catch {
@@ -239,6 +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
        }
        }
@@ -306,6 +336,291 @@ proc read_diff {fd} {
        }
 }
 
+######################################################################
+##
+## commit
+
+proc load_last_commit {} {
+       global HEAD PARENT commit_type ui_comm
+
+       if {$commit_type == {amend}} return
+       if {$commit_type != {normal}} {
+               error_popup "Can't amend a $commit_type commit."
+               return
+       }
+
+       set msg {}
+       set parent {}
+       set parent_count 0
+       if {[catch {
+                       set fd [open "| git cat-file commit $HEAD" r]
+                       while {[gets $fd line] > 0} {
+                               if {[string match {parent *} $line]} {
+                                       set parent [string range $line 7 end]
+                                       incr parent_count
+                               }
+                       }
+                       set msg [string trim [read $fd]]
+                       close $fd
+               } err]} {
+               error_popup "Error loading commit data for amend:\n$err"
+               return
+       }
+
+       if {$parent_count == 0} {
+               set commit_type amend
+               set HEAD {}
+               set PARENT {}
+               update_status
+       } elseif {$parent_count == 1} {
+               set commit_type amend
+               set PARENT $parent
+               $ui_comm delete 0.0 end
+               $ui_comm insert end $msg
+               $ui_comm edit modified false
+               update_status
+       } else {
+               error_popup {You can't amend a merge commit.}
+               return
+       }
+}
+
+proc commit_tree {} {
+       global tcl_platform HEAD gitdir commit_type file_states
+       global commit_active ui_status_value
+       global ui_comm
+
+       if {$commit_active || ![lock_index update]} return
+
+       # -- Our in memory state should match the repository.
+       #
+       repository_state curHEAD cur_type
+       if {$commit_type == {amend} 
+               && $cur_type == {normal}
+               && $curHEAD == $HEAD} {
+       } elseif {$commit_type != $cur_type || $HEAD != $curHEAD} {
+               error_popup {Last scanned state does not match repository state.
+
+Its highly likely that another Git program modified the
+repository since our last scan.  A rescan is required
+before committing.
+}
+               unlock_index
+               update_status
+               return
+       }
+
+       # -- At least one file should differ in the index.
+       #
+       set files_ready 0
+       foreach path [array names file_states] {
+               set s $file_states($path)
+               switch -glob -- [lindex $s 0] {
+               _* {continue}
+               A* -
+               D* -
+               M* {set files_ready 1; break}
+               U* {
+                       error_popup "Unmerged files cannot be committed.
+
+File $path has merge conflicts.
+You must resolve them and check the file in before committing.
+"
+                       unlock_index
+                       return
+               }
+               default {
+                       error_popup "Unknown file state [lindex $s 0] detected.
+
+File $path cannot be committed by this program.
+"
+               }
+               }
+       }
+       if {!$files_ready} {
+               error_popup {No checked-in files to commit.
+
+You must check-in at least 1 file before you can commit.
+}
+               unlock_index
+               return
+       }
+
+       # -- A message is required.
+       #
+       set msg [string trim [$ui_comm get 1.0 end]]
+       if {$msg == {}} {
+               error_popup {Please supply a commit message.
+
+A good commit message has the following format:
+
+- First line: Describe in one sentance what you did.
+- Second line: Blank
+- Remaining lines: Describe why this change is good.
+}
+               unlock_index
+               return
+       }
+
+       # -- Ask the pre-commit hook for the go-ahead.
+       #
+       set pchook [file join $gitdir hooks pre-commit]
+       if {$tcl_platform(platform) == {windows} && [file isfile $pchook]} {
+               set pchook [list sh -c \
+                       "if test -x \"$pchook\"; then exec \"$pchook\"; fi"]
+       } elseif {[file executable $pchook]} {
+               set pchook [list $pchook]
+       } else {
+               set pchook {}
+       }
+       if {$pchook != {} && [catch {eval exec $pchook} err]} {
+               hook_failed_popup pre-commit $err
+               unlock_index
+               return
+       }
+
+       # -- Write the tree in the background.
+       #
+       set commit_active 1
+       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]
+}
+
+proc commit_stage2 {fd_wt curHEAD msg} {
+       global single_commit gitdir PARENT commit_type
+       global commit_active ui_status_value ui_comm
+
+       gets $fd_wt tree_id
+       close $fd_wt
+
+       if {$tree_id == {}} {
+               error_popup "write-tree failed"
+               set commit_active 0
+               set ui_status_value {Commit failed.}
+               unlock_index
+               return
+       }
+
+       # -- Create the commit.
+       #
+       set cmd [list git commit-tree $tree_id]
+       if {$PARENT != {}} {
+               lappend cmd -p $PARENT
+       }
+       if {$commit_type == {merge}} {
+               if {[catch {
+                               set fd_mh [open [file join $gitdir MERGE_HEAD] r]
+                               while {[gets $fd_mh merge_head] >= 0} {
+                                       lappend cmd -p $merge_head
+                               }
+                               close $fd_mh
+                       } err]} {
+                       error_popup "Loading MERGE_HEADs failed:\n$err"
+                       set commit_active 0
+                       set ui_status_value {Commit failed.}
+                       unlock_index
+                       return
+               }
+       }
+       if {$PARENT == {}} {
+               # git commit-tree writes to stderr during initial commit.
+               lappend cmd 2>/dev/null
+       }
+       lappend cmd << $msg
+       if {[catch {set cmt_id [eval exec $cmd]} err]} {
+               error_popup "commit-tree failed:\n$err"
+               set commit_active 0
+               set ui_status_value {Commit failed.}
+               unlock_index
+               return
+       }
+
+       # -- Update the HEAD ref.
+       #
+       set reflogm commit
+       if {$commit_type != {normal}} {
+               append reflogm " ($commit_type)"
+       }
+       set i [string first "\n" $msg]
+       if {$i >= 0} {
+               append reflogm {: } [string range $msg 0 [expr $i - 1]]
+       } else {
+               append reflogm {: } $msg
+       }
+       set cmd [list git update-ref -m $reflogm HEAD $cmt_id $curHEAD]
+       if {[catch {eval exec $cmd} err]} {
+               error_popup "update-ref failed:\n$err"
+               set commit_active 0
+               set ui_status_value {Commit failed.}
+               unlock_index
+               return
+       }
+
+       # -- Cleanup after ourselves.
+       #
+       catch {file delete [file join $gitdir MERGE_HEAD]}
+       catch {file delete [file join $gitdir MERGE_MSG]}
+       catch {file delete [file join $gitdir SQUASH_MSG]}
+       catch {file delete [file join $gitdir GITGUI_MSG]}
+
+       # -- Let rerere do its thing.
+       #
+       if {[file isdirectory [file join $gitdir rr-cache]]} {
+               catch {exec git rerere}
+       }
+
+       $ui_comm delete 0.0 end
+       $ui_comm edit modified false
+
+       if {$single_commit} do_quit
+
+       set commit_type {}
+       set commit_active 0
+       set HEAD $cmt_id
+       set PARENT $cmt_id
+       unlock_index
+       update_status "Changes committed as $cmt_id."
+}
+
+######################################################################
+##
+## fetch pull push
+
+proc fetch_from {remote} {
+       set w [new_console "fetch $remote" \
+               "Fetching new changes from $remote"]
+       set cmd [list git fetch]
+       lappend cmd $remote
+       console_exec $w $cmd
+}
+
+proc pull_remote {remote branch} {
+       set w [new_console "pull $remote $branch" \
+               "Pulling new changes from branch $branch in $remote"]
+       set cmd [list git pull]
+       lappend cmd $remote
+       lappend cmd $branch
+       console_exec $w $cmd [list post_pull_remote $remote $branch]
+}
+
+proc post_pull_remote {remote branch success} {
+       if {$success} {
+               update_status "Successfully pulled $branch from $remote."
+       } else {
+               update_status "Conflicts detected while pulling $branch from $remote."
+       }
+}
+
+proc push_to {remote} {
+       set w [new_console "push $remote" \
+               "Pushing changes to $remote"]
+       set cmd [list git push]
+       lappend cmd $remote
+       console_exec $w $cmd
+}
+
 ######################################################################
 ##
 ## ui helpers
@@ -465,7 +780,7 @@ 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]
@@ -475,12 +790,101 @@ 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
+       }
+}
+
+######################################################################
+##
+## config (fetch push pull)
+
+proc load_repo_config {} {
+       global repo_config
+
+       array unset repo_config
+       catch {
+               set fd_rc [open "| git repo-config --list" r]
+               while {[gets $fd_rc line] >= 0} {
+                       if {[regexp {^([^=]+)=(.*)$} $line line name value]} {
+                               lappend repo_config($name) $value
+                       }
+               }
+               close $fd_rc
+       }
+}
+
+proc load_all_remotes {} {
+       global gitdir all_remotes repo_config
+
+       set all_remotes [list]
+       set rm_dir [file join $gitdir remotes]
+       if {[file isdirectory $rm_dir]} {
+               set all_remotes [concat $all_remotes [glob \
+                       -types f \
+                       -tails \
+                       -nocomplain \
+                       -directory $rm_dir *]]
+       }
+
+       foreach line [array names repo_config remote.*.url] {
+               if {[regexp ^remote\.(.*)\.url\$ $line line name]} {
+                       lappend all_remotes $name
+               }
+       }
+
+       set all_remotes [lsort -unique $all_remotes]
+}
+
+proc populate_remote_menu {m pfx op} {
+       global all_remotes mainfont
+
+       foreach remote $all_remotes {
+               $m add command -label "$pfx $remote..." \
+                       -command [list $op $remote] \
+                       -font $mainfont
+       }
+}
+
+proc populate_pull_menu {m} {
+       global gitdir repo_config all_remotes mainfont
+
+       foreach remote $all_remotes {
+               set rb {}
+               if {[array get repo_config remote.$remote.url] != {}} {
+                       if {[array get repo_config remote.$remote.fetch] != {}} {
+                               regexp {^([^:]+):} \
+                                       [lindex $repo_config(remote.$remote.fetch) 0] \
+                                       line rb
+                       }
+               } else {
+                       catch {
+                               set fd [open [file join $gitdir remotes $remote] r]
+                               while {[gets $fd line] >= 0} {
+                                       if {[regexp {^Pull:[ \t]*([^:]+):} $line line rb]} {
+                                               break
+                                       }
+                               }
+                               close $fd
+                       }
+               }
+
+               set rb_short $rb
+               regsub ^refs/heads/ $rb {} rb_short
+               if {$rb_short != {}} {
+                       $m add command \
+                               -label "Branch $rb_short from $remote..." \
+                               -command [list pull_remote $remote $rb] \
+                               -font $mainfont
+               }
+       }
 }
 
 ######################################################################
@@ -569,6 +973,7 @@ 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"}
@@ -599,20 +1004,25 @@ proc error_popup {msg} {
 }
 
 proc show_msg {w top msg} {
-       global gitdir
+       global gitdir appname mainfont
 
        message $w.m -text $msg -justify left -aspect 400
-       pack $w.m -side top -fill x -padx 20 -pady 20
-       button $w.ok -text OK -command "destroy $top"
+       pack $w.m -side top -fill x -padx 5 -pady 10
+       button $w.ok -text OK \
+               -width 15 \
+               -font $mainfont \
+               -command "destroy $top"
        pack $w.ok -side bottom
        bind $top <Visibility> "grab $top; focus $top"
        bind $top <Key-Return> "destroy $top"
-       wm title $top "error: git-ui ([file normalize [file dirname $gitdir]])"
+       wm title $w "$appname ([lindex [file split \
+               [file normalize [file dirname $gitdir]]] \
+               end]): error"
        tkwait window $top
 }
 
 proc hook_failed_popup {hook msg} {
-       global gitdir mainfont difffont
+       global gitdir mainfont difffont appname
 
        set w .hookfail
        toplevel $w
@@ -646,31 +1056,162 @@ proc hook_failed_popup {hook msg} {
 
        button $w.ok -text OK \
                -width 15 \
+               -font $mainfont \
                -command "destroy $w"
        pack $w.ok -side bottom
 
        bind $w <Visibility> "grab $w; focus $w"
        bind $w <Key-Return> "destroy $w"
-       wm title $w "error: git-ui ([file normalize [file dirname $gitdir]])"
+       wm title $w "$appname ([lindex [file split \
+               [file normalize [file dirname $gitdir]]] \
+               end]): error"
        tkwait window $w
 }
 
+set next_console_id 0
+
+proc new_console {short_title long_title} {
+       global next_console_id console_data
+       set w .console[incr next_console_id]
+       set console_data($w) [list $short_title $long_title]
+       return [console_init $w]
+}
+
+proc console_init {w} {
+       global console_cr console_data
+       global gitdir appname mainfont difffont
+
+       set console_cr($w) 1.0
+       toplevel $w
+       frame $w.m
+       label $w.m.l1 -text "[lindex $console_data($w) 1]:" \
+               -anchor w \
+               -justify left \
+               -font [concat $mainfont bold]
+       text $w.m.t \
+               -background white -borderwidth 1 \
+               -relief sunken \
+               -width 80 -height 10 \
+               -font $difffont \
+               -state disabled \
+               -yscrollcommand [list $w.m.sby set]
+       label $w.m.s -anchor w \
+               -justify left \
+               -font [concat $mainfont bold]
+       scrollbar $w.m.sby -command [list $w.m.t yview]
+       pack $w.m.l1 -side top -fill x
+       pack $w.m.s -side bottom -fill x
+       pack $w.m.sby -side right -fill y
+       pack $w.m.t -side left -fill both -expand 1
+       pack $w.m -side top -fill both -expand 1 -padx 5 -pady 10
+
+       button $w.ok -text {Running...} \
+               -width 15 \
+               -font $mainfont \
+               -state disabled \
+               -command "destroy $w"
+       pack $w.ok -side bottom
+
+       bind $w <Visibility> "focus $w"
+       wm title $w "$appname ([lindex [file split \
+               [file normalize [file dirname $gitdir]]] \
+               end]): [lindex $console_data($w) 0]"
+       return $w
+}
+
+proc console_exec {w cmd {after {}}} {
+       global tcl_platform
+
+       # -- Windows tosses the enviroment when we exec our child.
+       #    But most users need that so we have to relogin. :-(
+       #
+       if {$tcl_platform(platform) == {windows}} {
+               set cmd [list sh --login -c "cd \"[pwd]\" && [join $cmd { }]"]
+       }
+
+       # -- Tcl won't let us redirect both stdout and stderr to
+       #    the same pipe.  So pass it through cat...
+       #
+       set cmd [concat | $cmd |& cat]
+
+       set fd_f [open $cmd r]
+       fconfigure $fd_f -blocking 0 -translation binary
+       fileevent $fd_f readable [list console_read $w $fd_f $after]
+}
+
+proc console_read {w fd after} {
+       global console_cr console_data
+
+       set buf [read $fd]
+       if {$buf != {}} {
+               if {![winfo exists $w]} {console_init $w}
+               $w.m.t conf -state normal
+               set c 0
+               set n [string length $buf]
+               while {$c < $n} {
+                       set cr [string first "\r" $buf $c]
+                       set lf [string first "\n" $buf $c]
+                       if {$cr < 0} {set cr [expr $n + 1]}
+                       if {$lf < 0} {set lf [expr $n + 1]}
+
+                       if {$lf < $cr} {
+                               $w.m.t insert end [string range $buf $c $lf]
+                               set console_cr($w) [$w.m.t index {end -1c}]
+                               set c $lf
+                               incr c
+                       } else {
+                               $w.m.t delete $console_cr($w) end
+                               $w.m.t insert end "\n"
+                               $w.m.t insert end [string range $buf $c $cr]
+                               set c $cr
+                               incr c
+                       }
+               }
+               $w.m.t conf -state disabled
+               $w.m.t see end
+       }
+
+       fconfigure $fd -blocking 1
+       if {[eof $fd]} {
+               if {[catch {close $fd}]} {
+                       if {![winfo exists $w]} {console_init $w}
+                       $w.m.s conf -background red -text {Error: Command Failed}
+                       $w.ok conf -text Close
+                       $w.ok conf -state normal
+                       set ok 0
+               } elseif {[winfo exists $w]} {
+                       $w.m.s conf -background green -text {Success}
+                       $w.ok conf -text Close
+                       $w.ok conf -state normal
+                       set ok 1
+               }
+               array unset console_cr $w
+               array unset console_data $w
+               if {$after != {}} {
+                       uplevel #0 $after $ok
+               }
+               return
+       }
+       fconfigure $fd -blocking 0
+}
+
 ######################################################################
 ##
 ## ui commands
 
 set starting_gitk_msg {Please wait... Starting gitk...}
+
 proc do_gitk {} {
        global tcl_platform ui_status_value starting_gitk_msg
 
        set ui_status_value $starting_gitk_msg
-       after 5000 {
+       after 10000 {
                if {$ui_status_value == $starting_gitk_msg} {
                        set ui_status_value {Ready.}
                }
        }
 
-    if {$tcl_platform(platform) == "windows"} {
+       if {$tcl_platform(platform) == {windows}} {
                exec sh -c gitk &
        } else {
                exec gitk &
@@ -681,14 +1222,14 @@ proc do_quit {} {
        global gitdir ui_comm
 
        set save [file join $gitdir GITGUI_MSG]
-       if {[$ui_comm edit modified]
-           && [string trim [$ui_comm get 0.0 end]] != {}} {
+       set msg [string trim [$ui_comm get 0.0 end]]
+       if {[$ui_comm edit modified] && $msg != {}} {
                catch {
                        set fd [open $save w]
                        puts $fd [string trim [$ui_comm get 0.0 end]]
                        close $fd
                }
-       } elseif {[file exists $save]} {
+       } elseif {$msg == {} && [file exists $save]} {
                file delete $save
        }
 
@@ -740,92 +1281,12 @@ proc do_signoff {} {
        }
 }
 
-proc do_commit {} {
-       global tcl_platform HEAD gitdir commit_type file_states
-       global ui_comm
-
-       # -- Our in memory state should match the repository.
-       #
-       if {[catch {set curHEAD [exec git rev-parse --verify HEAD]}]} {
-               set cur_type initial
-       } else {
-               set cur_type normal
-       }
-       if {$commit_type != $commit_type || $HEAD != $curHEAD} {
-               error_popup {Last scanned state does not match repository state.
-
-Its highly likely that another Git program modified the
-repository since our last scan.  A rescan is required
-before committing.
+proc do_amend_last {} {
+       load_last_commit
 }
-               update_status
-               return
-       }
-
-       # -- At least one file should differ in the index.
-       #
-       set files_ready 0
-       foreach path [array names file_states] {
-               set s $file_states($path)
-               switch -glob -- [lindex $s 0] {
-               _* {continue}
-               A* -
-               D* -
-               M* {set files_ready 1; break}
-               U* {
-                       error_popup "Unmerged files cannot be committed.
-
-File $path has merge conflicts.
-You must resolve them and check the file in before committing.
-"
-                       return
-               }
-               default {
-                       error_popup "Unknown file state [lindex $s 0] detected.
-
-File $path cannot be committed by this program.
-"
-               }
-               }
-       }
-       if {!$files_ready} {
-               error_popup {No checked-in files to commit.
-
-You must check-in at least 1 file before you can commit.
-}
-               return
-       }
 
-       # -- A message is required.
-       #
-       set msg [string trim [$ui_comm get 1.0 end]]
-       if {$msg == {}} {
-               error_popup {Please supply a commit message.
-
-A good commit message has the following format:
-
-- First line: Describe in one sentance what you did.
-- Second line: Blank
-- Remaining lines: Describe why this change is good.
-}
-               return
-       }
-
-       # -- Ask the pre-commit hook for the go-ahead.
-       #
-       set pchook [file join $gitdir hooks pre-commit]
-       if {$tcl_platform(platform) == {windows} && [file exists $pchook]} {
-               set pchook [list sh -c \
-                       "if test -x \"$pchook\"; then exec \"$pchook\"; fi"]
-       } elseif {[file executable $pchook]} {
-               set pchook [list $pchook]
-       } else {
-               set pchook {}
-       }
-       if {$pchook != {} && [catch {eval exec $pchook} err]} {
-               hook_failed_popup pre-commit $err
-               return
-       }
+proc do_commit {} {
+       commit_tree
 }
 
 # shift == 1: left click
@@ -867,9 +1328,10 @@ set mainfont {Helvetica 10}
 set difffont {Courier 10}
 set maincursor [. cget -cursor]
 
-switch -- $tcl_platform(platform) {
-windows {set M1B Control; set M1T Ctrl}
-default {set M1B M1; set M1T M1}
+switch -glob -- "$tcl_platform(platform),$tcl_platform(os)" {
+windows,*   {set M1B Control; set M1T Ctrl}
+unix,Darwin {set M1B M1; set M1T Cmd}
+default     {set M1B M1; set M1T M1}
 }
 
 # -- Menu Bar
@@ -878,6 +1340,7 @@ menu .mbar -tearoff 0
 .mbar add cascade -label Commit -menu .mbar.commit
 .mbar add cascade -label Fetch -menu .mbar.fetch
 .mbar add cascade -label Pull -menu .mbar.pull
+.mbar add cascade -label Push -menu .mbar.push
 . configure -menu .mbar
 
 # -- Project Menu
@@ -898,6 +1361,11 @@ menu .mbar.commit
        -font $mainfont
 lappend disable_on_lock \
        [list .mbar.commit entryconf [.mbar.commit index last] -state]
+.mbar.commit add command -label {Amend Last Commit} \
+       -command do_amend_last \
+       -font $mainfont
+lappend disable_on_lock \
+       [list .mbar.commit entryconf [.mbar.commit index last] -state]
 .mbar.commit add command -label {Check-in All Files} \
        -command do_checkin_all \
        -accelerator $M1T-U \
@@ -921,6 +1389,9 @@ menu .mbar.fetch
 # -- Pull Menu
 menu .mbar.pull
 
+# -- Push Menu
+menu .mbar.push
+
 # -- Main Window Layout
 panedwindow .vpane -orient vertical
 panedwindow .vpane.files -orient horizontal
@@ -1016,7 +1487,7 @@ $ui_diff tag conf dni -foreground "#a000a0"
 $ui_diff tag conf bold -font [concat $difffont bold]
 
 # -- Commit Area
-frame .vpane.commarea -height 150
+frame .vpane.commarea -height 170
 .vpane add .vpane.commarea -stick nsew
 
 # -- Commit Area Buttons
@@ -1034,6 +1505,12 @@ button .vpane.commarea.buttons.rescan -text {Rescan} \
 pack .vpane.commarea.buttons.rescan -side top -fill x
 lappend disable_on_lock {.vpane.commarea.buttons.rescan conf -state}
 
+button .vpane.commarea.buttons.amend -text {Amend Last} \
+       -command do_amend_last \
+       -font $mainfont
+pack .vpane.commarea.buttons.amend -side top -fill x
+lappend disable_on_lock {.vpane.commarea.buttons.amend conf -state}
+
 button .vpane.commarea.buttons.ciall -text {Check-in All} \
        -command do_checkin_all \
        -font $mainfont
@@ -1054,10 +1531,18 @@ 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 \
@@ -1065,7 +1550,7 @@ 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
@@ -1081,17 +1566,20 @@ label .status -textvariable ui_status_value \
 pack .status -anchor w -side bottom -fill x
 
 # -- Key Bindings
-bind . <Destroy> do_quit
-bind . <Key-F5> do_rescan
-bind . <$M1B-Key-r> do_rescan
-bind . <$M1B-Key-R> do_rescan
-bind . <$M1B-Key-s> do_signoff
-bind . <$M1B-Key-S> do_signoff
-bind . <$M1B-Key-u> do_checkin_all
-bind . <$M1B-Key-U> do_checkin_all
-bind . <$M1B-Key-Return> do_commit
-bind . <$M1B-Key-q> do_quit
-bind . <$M1B-Key-Q> do_quit
+bind $ui_comm <$M1B-Key-Return> {do_commit;break}
+bind .   <Destroy> do_quit
+bind all <Key-F5> do_rescan
+bind all <$M1B-Key-r> do_rescan
+bind all <$M1B-Key-R> do_rescan
+bind .   <$M1B-Key-s> do_signoff
+bind .   <$M1B-Key-S> do_signoff
+bind .   <$M1B-Key-u> do_checkin_all
+bind .   <$M1B-Key-U> do_checkin_all
+bind .   <$M1B-Key-Return> do_commit
+bind all <$M1B-Key-q> do_quit
+bind all <$M1B-Key-Q> do_quit
+bind all <$M1B-Key-w> {destroy [winfo toplevel %W]}
+bind all <$M1B-Key-W> {destroy [winfo toplevel %W]}
 foreach i [list $ui_index $ui_other] {
        bind $i <Button-1> {click %W %x %y 1 %X %Y; break}
        bind $i <Button-3> {click %W %x %y 3 %X %Y; break}
@@ -1103,11 +1591,32 @@ unset i M1B M1T
 ##
 ## main
 
+set appname [lindex [file split $argv0] end]
+set gitdir {}
+
+if {[catch {set cdup [exec git rev-parse --show-cdup]} err]} {
+       show_msg {} . "Cannot find the git directory: $err"
+       exit 1
+}
+if {$cdup != ""} {
+       cd $cdup
+}
+unset cdup
+
 if {[catch {set gitdir [exec git rev-parse --git-dir]} err]} {
        show_msg {} . "Cannot find the git directory: $err"
        exit 1
 }
 
-wm title . "git-ui ([file normalize [file dirname $gitdir]])"
+if {$appname == {git-citool}} {
+       set single_commit 1
+}
+
+wm title . "$appname ([file normalize [file dirname $gitdir]])"
 focus -force $ui_comm
+load_repo_config
+load_all_remotes
+populate_remote_menu .mbar.fetch From fetch_from
+populate_remote_menu .mbar.push To push_to
+populate_pull_menu .mbar.pull
 update_status