git-gui: Make initial commits work properly.
[gitweb.git] / git-gui
diff --git a/git-gui b/git-gui
index 3ccf0a41deb7e60b7294b3879db71e796264b8f6..e2e0beae95004f2bdcc09e79a59fd5dd2c84d242 100755 (executable)
--- a/git-gui
+++ b/git-gui
@@ -90,15 +90,15 @@ proc save_config {} {
 
        foreach name [array names default_config] {
                set value $global_config_new($name)
-               if {$value != $global_config($name)} {
-                       if {$value == $default_config($name)} {
+               if {$value ne $global_config($name)} {
+                       if {$value eq $default_config($name)} {
                                catch {exec git repo-config --global --unset $name}
                        } else {
                                regsub -all "\[{}\]" $value {"} value
                                exec git repo-config --global $name $value
                        }
                        set global_config($name) $value
-                       if {$value == $repo_config($name)} {
+                       if {$value eq $repo_config($name)} {
                                catch {exec git repo-config --unset $name}
                                set repo_config($name) $value
                        }
@@ -107,8 +107,8 @@ proc save_config {} {
 
        foreach name [array names default_config] {
                set value $repo_config_new($name)
-               if {$value != $repo_config($name)} {
-                       if {$value == $global_config($name)} {
+               if {$value ne $repo_config($name)} {
+                       if {$value eq $global_config($name)} {
                                catch {exec git repo-config --unset $name}
                        } else {
                                regsub -all "\[{}\]" $value {"} value
@@ -123,26 +123,29 @@ proc error_popup {msg} {
        global gitdir appname
 
        set title $appname
-       if {$gitdir != {}} {
+       if {$gitdir ne {}} {
                append title { (}
                append title [lindex \
                        [file split [file normalize [file dirname $gitdir]]] \
                        end]
                append title {)}
        }
-       tk_messageBox \
-               -parent . \
+       set cmd [list tk_messageBox \
                -icon error \
                -type ok \
                -title "$title: error" \
-               -message $msg
+               -message $msg]
+       if {[winfo ismapped .]} {
+               lappend cmd -parent .
+       }
+       eval $cmd
 }
 
 proc info_popup {msg} {
        global gitdir appname
 
        set title $appname
-       if {$gitdir != {}} {
+       if {$gitdir ne {}} {
                append title { (}
                append title [lindex \
                        [file split [file normalize [file dirname $gitdir]]] \
@@ -161,19 +164,30 @@ proc info_popup {msg} {
 ##
 ## repository setup
 
-if {   [catch {set cdup [exec git rev-parse --show-cdup]} err]
-       || [catch {set gitdir [exec git rev-parse --git-dir]} err]} {
+if {   [catch {set gitdir $env(GIT_DIR)}]
+       && [catch {set gitdir [exec git rev-parse --git-dir]} err]} {
        catch {wm withdraw .}
        error_popup "Cannot find the git directory:\n\n$err"
        exit 1
 }
-if {$cdup != ""} {
-       cd $cdup
+if {![file isdirectory $gitdir]} {
+       catch {wm withdraw .}
+       error_popup "Git directory not found:\n\n$gitdir"
+       exit 1
+}
+if {[lindex [file split $gitdir] end] ne {.git}} {
+       catch {wm withdraw .}
+       error_popup "Cannot use funny .git directory:\n\n$gitdir"
+       exit 1
+}
+if {[catch {cd [file dirname $gitdir]} err]} {
+       catch {wm withdraw .}
+       error_popup "No working directory [file dirname $gitdir]:\n\n$err"
+       exit 1
 }
-unset cdup
 
 set single_commit 0
-if {$appname == {git-citool}} {
+if {$appname eq {git-citool}} {
        set single_commit 1
 }
 
@@ -181,8 +195,9 @@ if {$appname == {git-citool}} {
 ##
 ## task management
 
-set status_active 0
+set rescan_active 0
 set diff_active 0
+set last_clicked {}
 
 set disable_on_lock [list]
 set index_lock_type none
@@ -190,17 +205,18 @@ set index_lock_type none
 set HEAD {}
 set PARENT {}
 set commit_type {}
+set empty_tree {}
 
 proc lock_index {type} {
        global index_lock_type disable_on_lock
 
-       if {$index_lock_type == {none}} {
+       if {$index_lock_type eq {none}} {
                set index_lock_type $type
                foreach w $disable_on_lock {
                        uplevel #0 $w disabled
                }
                return 1
-       } elseif {$index_lock_type == {begin-update} && $type == {update}} {
+       } elseif {$index_lock_type eq {begin-update} && $type eq {update}} {
                set index_lock_type $type
                return 1
        }
@@ -225,6 +241,7 @@ proc repository_state {hdvar ctvar} {
        upvar $hdvar hd $ctvar ct
 
        if {[catch {set hd [exec git rev-parse --verify HEAD]}]} {
+               set hd {}
                set ct initial
        } elseif {[file exists [file join $gitdir MERGE_HEAD]]} {
                set ct merge
@@ -233,18 +250,30 @@ proc repository_state {hdvar ctvar} {
        }
 }
 
-proc update_status {{final Ready.}} {
+proc PARENT {} {
+       global PARENT empty_tree
+
+       if {$PARENT ne {}} {
+               return $PARENT
+       }
+       if {$empty_tree eq {}} {
+               set empty_tree [exec git mktree << {}]
+       }
+       return $empty_tree
+}
+
+proc rescan {after} {
        global HEAD PARENT commit_type
        global ui_index ui_other ui_status_value ui_comm
-       global status_active file_states
+       global rescan_active file_states
        global repo_config
 
-       if {$status_active || ![lock_index read]} return
+       if {$rescan_active > 0 || ![lock_index read]} return
 
        repository_state new_HEAD new_type
-       if {$commit_type == {amend} 
-               && $new_type == {normal}
-               && $new_HEAD == $HEAD} {
+       if {[string match amend* $commit_type]
+               && $new_type eq {normal}
+               && $new_HEAD eq $HEAD} {
        } else {
                set HEAD $new_HEAD
                set PARENT $new_HEAD
@@ -254,7 +283,7 @@ proc update_status {{final Ready.}} {
        array unset file_states
 
        if {![$ui_comm edit modified]
-               || [string trim [$ui_comm get 0.0 end]] == {}} {
+               || [string trim [$ui_comm get 0.0 end]] eq {}} {
                if {[load_message GITGUI_MSG]} {
                } elseif {[load_message MERGE_MSG]} {
                } elseif {[load_message SQUASH_MSG]} {
@@ -263,10 +292,10 @@ proc update_status {{final Ready.}} {
                $ui_comm edit reset
        }
 
-       if {$repo_config(gui.trustmtime) == {true}} {
-               update_status_stage2 {} $final
+       if {$repo_config(gui.trustmtime) eq {true}} {
+               rescan_stage2 {} $after
        } else {
-               set status_active 1
+               set rescan_active 1
                set ui_status_value {Refreshing file status...}
                set cmd [list git update-index]
                lappend cmd -q
@@ -276,17 +305,15 @@ proc update_status {{final Ready.}} {
                set fd_rf [open "| $cmd" r]
                fconfigure $fd_rf -blocking 0 -translation binary
                fileevent $fd_rf readable \
-                       [list update_status_stage2 $fd_rf $final]
+                       [list rescan_stage2 $fd_rf $after]
        }
 }
 
-proc update_status_stage2 {fd final} {
-       global gitdir PARENT commit_type
-       global ui_index ui_other ui_status_value ui_comm
-       global status_active
-       global buf_rdi buf_rdf buf_rlo
+proc rescan_stage2 {fd after} {
+       global gitdir ui_status_value
+       global rescan_active buf_rdi buf_rdf buf_rlo
 
-       if {$fd != {}} {
+       if {$fd ne {}} {
                read $fd
                if {![eof $fd]} return
                close $fd
@@ -303,18 +330,18 @@ proc update_status_stage2 {fd final} {
        set buf_rdf {}
        set buf_rlo {}
 
-       set status_active 3
+       set rescan_active 3
        set ui_status_value {Scanning for modified files ...}
-       set fd_di [open "| git diff-index --cached -z $PARENT" 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 $final]
-       fileevent $fd_df readable [list read_diff_files $fd_df $final]
-       fileevent $fd_lo readable [list read_ls_others $fd_lo $final]
+       fileevent $fd_di readable [list read_diff_index $fd_di $after]
+       fileevent $fd_df readable [list read_diff_files $fd_df $after]
+       fileevent $fd_lo readable [list read_ls_others $fd_lo $after]
 }
 
 proc load_message {file} {
@@ -334,7 +361,7 @@ proc load_message {file} {
        return 0
 }
 
-proc read_diff_index {fd final} {
+proc read_diff_index {fd after} {
        global buf_rdi
 
        append buf_rdi [read $fd]
@@ -351,7 +378,7 @@ proc read_diff_index {fd final} {
                incr z2 -1
                display_file \
                        [string range $buf_rdi $z1 $z2] \
-                       [string index $buf_rdi [expr $z1 - 2]]_
+                       [string index $buf_rdi [expr {$z1 - 2}]]_
                incr c
        }
        if {$c < $n} {
@@ -360,10 +387,10 @@ proc read_diff_index {fd final} {
                set buf_rdi {}
        }
 
-       status_eof $fd buf_rdi $final
+       rescan_done $fd buf_rdi $after
 }
 
-proc read_diff_files {fd final} {
+proc read_diff_files {fd after} {
        global buf_rdf
 
        append buf_rdf [read $fd]
@@ -380,7 +407,7 @@ proc read_diff_files {fd final} {
                incr z2 -1
                display_file \
                        [string range $buf_rdf $z1 $z2] \
-                       _[string index $buf_rdf [expr $z1 - 2]]
+                       _[string index $buf_rdf [expr {$z1 - 2}]]
                incr c
        }
        if {$c < $n} {
@@ -389,10 +416,10 @@ proc read_diff_files {fd final} {
                set buf_rdf {}
        }
 
-       status_eof $fd buf_rdf $final
+       rescan_done $fd buf_rdf $after
 }
 
-proc read_ls_others {fd final} {
+proc read_ls_others {fd after} {
        global buf_rlo
 
        append buf_rlo [read $fd]
@@ -401,22 +428,50 @@ proc read_ls_others {fd final} {
        foreach p [lrange $pck 0 end-1] {
                display_file $p _O
        }
-       status_eof $fd buf_rlo $final
+       rescan_done $fd buf_rlo $after
 }
 
-proc status_eof {fd buf final} {
-       global status_active ui_status_value
+proc rescan_done {fd buf after} {
+       global rescan_active
+       global file_states repo_config
        upvar $buf to_clear
 
-       if {[eof $fd]} {
-               set to_clear {}
-               close $fd
+       if {![eof $fd]} return
+       set to_clear {}
+       close $fd
+       if {[incr rescan_active -1] > 0} return
 
-               if {[incr status_active -1] == 0} {
-                       display_all_files
-                       unlock_index
-                       reshow_diff
-                       set ui_status_value $final
+       prune_selection
+       unlock_index
+       display_all_files
+
+       if {$repo_config(gui.partialinclude) ne {true}} {
+               set pathList [list]
+               foreach path [array names file_states] {
+                       switch -- [lindex $file_states($path) 0] {
+                       AM -
+                       MM {lappend pathList $path}
+                       }
+               }
+               if {$pathList ne {}} {
+                       update_index \
+                               "Updating included files" \
+                               $pathList \
+                               [concat {reshow_diff;} $after]
+                       return
+               }
+       }
+
+       reshow_diff
+       uplevel #0 $after
+}
+
+proc prune_selection {} {
+       global file_states selected_paths
+
+       foreach path [array names selected_paths] {
+               if {[catch {set still_here $file_states($path)}]} {
+                       unset selected_paths($path)
                }
        }
 }
@@ -426,48 +481,49 @@ proc status_eof {fd buf final} {
 ## diff
 
 proc clear_diff {} {
-       global ui_diff ui_fname_value ui_fstatus_value ui_index ui_other
+       global ui_diff current_diff ui_index ui_other
 
        $ui_diff conf -state normal
        $ui_diff delete 0.0 end
        $ui_diff conf -state disabled
 
-       set ui_fname_value {}
-       set ui_fstatus_value {}
+       set current_diff {}
 
        $ui_index tag remove in_diff 0.0 end
        $ui_other tag remove in_diff 0.0 end
 }
 
 proc reshow_diff {} {
-       global ui_fname_value ui_status_value file_states
+       global current_diff ui_status_value file_states
 
-       if {$ui_fname_value == {}
-               || [catch {set s $file_states($ui_fname_value)}]} {
+       if {$current_diff eq {}
+               || [catch {set s $file_states($current_diff)}]} {
                clear_diff
        } else {
-               show_diff $ui_fname_value
+               show_diff $current_diff
        }
 }
 
 proc handle_empty_diff {} {
-       global ui_fname_value file_states file_lists
+       global current_diff file_states file_lists
 
-       set path $ui_fname_value
+       set path $current_diff
        set s $file_states($path)
-       if {[lindex $s 0] != {_M}} return
+       if {[lindex $s 0] ne {_M}} return
 
        info_popup "No differences detected.
 
 [short_path $path] has no changes.
 
-The modification date of this file was updated by another
-application and you currently have the Trust File Modification
-Timestamps option enabled, so Git did not automatically detect
-that there are no content differences in this file.
+The modification date of this file was updated
+by another application and you currently have
+the Trust File Modification Timestamps option
+enabled, so Git did not automatically detect
+that there are no content differences in this
+file.
 
-This file will now be removed from the modified files list, to
-prevent possible confusion.
+This file will now be removed from the modified
+files list, to prevent possible confusion.
 "
        if {[catch {exec git update-index -- $path} err]} {
                error_popup "Failed to refresh index:\n\n$err"
@@ -481,20 +537,20 @@ prevent possible confusion.
                        [lreplace $file_lists($old_w) $lno $lno]
                incr lno
                $old_w conf -state normal
-               $old_w delete $lno.0 [expr $lno + 1].0
+               $old_w delete $lno.0 [expr {$lno + 1}].0
                $old_w conf -state disabled
        }
 }
 
 proc show_diff {path {w {}} {lno {}}} {
        global file_states file_lists
-       global PARENT diff_3way diff_active
-       global ui_diff ui_fname_value ui_fstatus_value ui_status_value
+       global diff_3way diff_active repo_config
+       global ui_diff current_diff ui_status_value
 
        if {$diff_active || ![lock_index read]} return
 
        clear_diff
-       if {$w == {} || $lno == {}} {
+       if {$w eq {} || $lno == {}} {
                foreach w [array names file_lists] {
                        set lno [lsearch -sorted $file_lists($w) $path]
                        if {$lno >= 0} {
@@ -503,22 +559,27 @@ proc show_diff {path {w {}} {lno {}}} {
                        }
                }
        }
-       if {$w != {} && $lno >= 1} {
-               $w tag add in_diff $lno.0 [expr $lno + 1].0
+       if {$w ne {} && $lno >= 1} {
+               $w tag add in_diff $lno.0 [expr {$lno + 1}].0
        }
 
        set s $file_states($path)
        set m [lindex $s 0]
        set diff_3way 0
        set diff_active 1
-       set ui_fname_value [escape_path $path]
-       set ui_fstatus_value [mapdesc $m $path]
+       set current_diff $path
        set ui_status_value "Loading diff of [escape_path $path]..."
 
-       set cmd [list | git diff-index -p $PARENT -- $path]
+       set cmd [list | git diff-index]
+       lappend cmd --no-color
+       if {$repo_config(gui.diffcontext) > 0} {
+               lappend cmd "-U$repo_config(gui.diffcontext)"
+       }
+       lappend cmd -p
+
        switch $m {
        MM {
-               set cmd [list | git diff-index -p -c $PARENT $path]
+               lappend cmd -c
        }
        _O {
                if {[catch {
@@ -542,6 +603,10 @@ proc show_diff {path {w {}} {lno {}}} {
        }
        }
 
+       lappend cmd [PARENT]
+       lappend cmd --
+       lappend cmd $path
+
        if {[catch {set fd [open $cmd r]} err]} {
                set diff_active 0
                unlock_index
@@ -604,8 +669,8 @@ proc read_diff {fd} {
                unlock_index
                set ui_status_value {Ready.}
 
-               if {$repo_config(gui.trustmtime) == {true}
-                       && [$ui_diff index end] == {2.0}} {
+               if {$repo_config(gui.trustmtime) eq {true}
+                       && [$ui_diff index end] eq {2.0}} {
                        handle_empty_diff
                }
        }
@@ -618,8 +683,8 @@ proc read_diff {fd} {
 proc load_last_commit {} {
        global HEAD PARENT commit_type ui_comm
 
-       if {$commit_type == {amend}} return
-       if {$commit_type != {normal}} {
+       if {[string match amend* $commit_type]} return
+       if {$commit_type ne {normal}} {
                error_popup "Can't amend a $commit_type commit."
                return
        }
@@ -642,47 +707,48 @@ proc load_last_commit {} {
                return
        }
 
+       if {$parent_count > 1} {
+               error_popup {Can't amend a merge commit.}
+               return
+       }
+
        if {$parent_count == 0} {
-               set commit_type amend
-               set HEAD {}
+               set commit_type amend-initial
                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
-               $ui_comm edit reset
-               update_status
-       } else {
-               error_popup {You can't amend a merge commit.}
-               return
        }
+
+       $ui_comm delete 0.0 end
+       $ui_comm insert end $msg
+       $ui_comm edit modified false
+       $ui_comm edit reset
+       rescan {set ui_status_value {Ready.}}
 }
 
 proc commit_tree {} {
-       global tcl_platform HEAD gitdir commit_type file_states
-       global pch_error
-       global ui_status_value ui_comm
+       global HEAD commit_type file_states ui_comm repo_config
 
        if {![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} {
+       if {[string match amend* $commit_type]
+               && $cur_type eq {normal}
+               && $curHEAD eq $HEAD} {
+       } elseif {$commit_type ne $cur_type || $HEAD ne $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
+repository since the last scan.  A rescan is required
 before committing.
+
+A rescan will be automatically started now.
 }
                unlock_index
-               update_status
+               rescan {set ui_status_value {Ready.}}
                return
        }
 
@@ -690,8 +756,7 @@ before committing.
        #
        set files_ready 0
        foreach path [array names file_states] {
-               set s $file_states($path)
-               switch -glob -- [lindex $s 0] {
+               switch -glob -- [lindex $file_states($path) 0] {
                _? {continue}
                A? -
                D? -
@@ -725,7 +790,7 @@ You must include at least 1 file before you can commit.
        # -- A message is required.
        #
        set msg [string trim [$ui_comm get 1.0 end]]
-       if {$msg == {}} {
+       if {$msg eq {}} {
                error_popup {Please supply a commit message.
 
 A good commit message has the following format:
@@ -738,10 +803,39 @@ A good commit message has the following format:
                return
        }
 
-       # -- Ask the pre-commit hook for the go-ahead.
+       # -- Update included files if partialincludes are off.
        #
+       if {$repo_config(gui.partialinclude) ne {true}} {
+               set pathList [list]
+               foreach path [array names file_states] {
+                       switch -glob -- [lindex $file_states($path) 0] {
+                       A? -
+                       M? {lappend pathList $path}
+                       }
+               }
+               if {$pathList ne {}} {
+                       unlock_index
+                       update_index \
+                               "Updating included files" \
+                               $pathList \
+                               [concat {lock_index update;} \
+                                       [list commit_prehook $curHEAD $msg]]
+                       return
+               }
+       }
+
+       commit_prehook $curHEAD $msg
+}
+
+proc commit_prehook {curHEAD msg} {
+       global tcl_platform gitdir ui_status_value pch_error
+
+       # On Cygwin [file executable] might lie so we need to ask
+       # the shell if the hook is executable.  Yes that's annoying.
+
        set pchook [file join $gitdir hooks pre-commit]
-       if {$tcl_platform(platform) == {windows} && [file isfile $pchook]} {
+       if {$tcl_platform(platform) eq {windows}
+               && [file isfile $pchook]} {
                set pchook [list sh -c [concat \
                        "if test -x \"$pchook\";" \
                        "then exec \"$pchook\" 2>&1;" \
@@ -749,21 +843,19 @@ A good commit message has the following format:
        } elseif {[file executable $pchook]} {
                set pchook [list $pchook |& cat]
        } else {
-               set pchook {}
-       }
-       if {$pchook != {}} {
-               set ui_status_value {Calling pre-commit hook...}
-               set pch_error {}
-               set fd_ph [open "| $pchook" r]
-               fconfigure $fd_ph -blocking 0 -translation binary
-               fileevent $fd_ph readable \
-                       [list commit_stage1 $fd_ph $curHEAD $msg]
-       } else {
-               commit_stage2 $curHEAD $msg
+               commit_writetree $curHEAD $msg
+               return
        }
+
+       set ui_status_value {Calling pre-commit hook...}
+       set pch_error {}
+       set fd_ph [open "| $pchook" r]
+       fconfigure $fd_ph -blocking 0 -translation binary
+       fileevent $fd_ph readable \
+               [list commit_prehook_wait $fd_ph $curHEAD $msg]
 }
 
-proc commit_stage1 {fd_ph curHEAD msg} {
+proc commit_prehook_wait {fd_ph curHEAD msg} {
        global pch_error ui_status_value
 
        append pch_error [read $fd_ph]
@@ -774,31 +866,30 @@ proc commit_stage1 {fd_ph curHEAD msg} {
                        hook_failed_popup pre-commit $pch_error
                        unlock_index
                } else {
-                       commit_stage2 $curHEAD $msg
+                       commit_writetree $curHEAD $msg
                }
                set pch_error {}
-       } else {
-               fconfigure $fd_ph -blocking 0
+               return
        }
+       fconfigure $fd_ph -blocking 0
 }
 
-proc commit_stage2 {curHEAD msg} {
+proc commit_writetree {curHEAD msg} {
        global ui_status_value
 
-       # -- Write the tree in the background.
-       #
        set ui_status_value {Committing changes...}
        set fd_wt [open "| git write-tree" r]
-       fileevent $fd_wt readable [list commit_stage3 $fd_wt $curHEAD $msg]
+       fileevent $fd_wt readable \
+               [list commit_committree $fd_wt $curHEAD $msg]
 }
 
-proc commit_stage3 {fd_wt curHEAD msg} {
-       global single_commit gitdir HEAD PARENT commit_type
+proc commit_committree {fd_wt curHEAD msg} {
+       global single_commit gitdir HEAD PARENT commit_type tcl_platform
        global ui_status_value ui_comm
-       global file_states
+       global file_states selected_paths
 
        gets $fd_wt tree_id
-       if {$tree_id == {} || [catch {close $fd_wt} err]} {
+       if {$tree_id eq {} || [catch {close $fd_wt} err]} {
                error_popup "write-tree failed:\n\n$err"
                set ui_status_value {Commit failed.}
                unlock_index
@@ -808,10 +899,10 @@ proc commit_stage3 {fd_wt curHEAD msg} {
        # -- Create the commit.
        #
        set cmd [list git commit-tree $tree_id]
-       if {$PARENT != {}} {
+       if {$PARENT ne {}} {
                lappend cmd -p $PARENT
        }
-       if {$commit_type == {merge}} {
+       if {$commit_type eq {merge}} {
                if {[catch {
                                set fd_mh [open [file join $gitdir MERGE_HEAD] r]
                                while {[gets $fd_mh merge_head] >= 0} {
@@ -825,7 +916,7 @@ proc commit_stage3 {fd_wt curHEAD msg} {
                        return
                }
        }
-       if {$PARENT == {}} {
+       if {$PARENT eq {}} {
                # git commit-tree writes to stderr during initial commit.
                lappend cmd 2>/dev/null
        }
@@ -840,12 +931,12 @@ proc commit_stage3 {fd_wt curHEAD msg} {
        # -- Update the HEAD ref.
        #
        set reflogm commit
-       if {$commit_type != {normal}} {
+       if {$commit_type ne {normal}} {
                append reflogm " ($commit_type)"
        }
        set i [string first "\n" $msg]
        if {$i >= 0} {
-               append reflogm {: } [string range $msg 0 [expr $i - 1]]
+               append reflogm {: } [string range $msg 0 [expr {$i - 1}]]
        } else {
                append reflogm {: } $msg
        }
@@ -870,6 +961,21 @@ proc commit_stage3 {fd_wt curHEAD msg} {
                catch {exec git rerere}
        }
 
+       # -- Run the post-commit hook.
+       #
+       set pchook [file join $gitdir hooks post-commit]
+       if {$tcl_platform(platform) eq {windows} && [file isfile $pchook]} {
+               set pchook [list sh -c [concat \
+                       "if test -x \"$pchook\";" \
+                       "then exec \"$pchook\";" \
+                       "fi"]]
+       } elseif {![file executable $pchook]} {
+               set pchook {}
+       }
+       if {$pchook ne {}} {
+               catch {exec $pchook &}
+       }
+
        $ui_comm delete 0.0 end
        $ui_comm edit modified false
        $ui_comm edit reset
@@ -891,8 +997,9 @@ proc commit_stage3 {fd_wt curHEAD msg} {
                D? {set m _[string index $m 1]}
                }
 
-               if {$m == {__}} {
+               if {$m eq {__}} {
                        unset file_states($path)
+                       catch {unset selected_paths($path)}
                } else {
                        lset file_states($path) 0 $m
                }
@@ -925,7 +1032,7 @@ proc pull_remote {remote branch} {
        # -- Our in memory state should match the repository.
        #
        repository_state curHEAD cur_type
-       if {$commit_type != $cur_type || $HEAD != $curHEAD} {
+       if {$commit_type ne $cur_type || $HEAD ne $curHEAD} {
                error_popup {Last scanned state does not match repository state.
 
 Its highly likely that another Git program modified the
@@ -933,7 +1040,7 @@ repository since our last scan.  A rescan is required
 before a pull can be started.
 }
                unlock_index
-               update_status
+               rescan {set ui_status_value {Ready.}}
                return
        }
 
@@ -954,7 +1061,7 @@ Commit or throw away all changes before starting a pull operation.
        set w [new_console "pull $remote $branch" \
                "Pulling new changes from branch $branch in $remote"]
        set cmd [list git pull]
-       if {$repo_config(gui.pullsummary) == {false}} {
+       if {$repo_config(gui.pullsummary) eq {false}} {
                lappend cmd --no-summary
        }
        lappend cmd $remote
@@ -970,10 +1077,10 @@ proc post_pull_remote {remote branch success} {
        if {$success} {
                repository_state HEAD commit_type
                set PARENT $HEAD
-               set $ui_status_value {Ready.}
+               set $ui_status_value "Pulling $branch from $remote complete."
        } else {
-               update_status \
-                       "Conflicts detected while pulling $branch from $remote."
+               set m "Conflicts detected while pulling $branch from $remote."
+               rescan "set ui_status_value {$m}"
        }
 }
 
@@ -1044,15 +1151,15 @@ proc merge_state {path new_state} {
                set icon [lindex $info 1]
        }
 
-       if {$s0 == {_}} {
+       if {$s0 eq {_}} {
                set s0 [string index $state 0]
-       } elseif {$s0 == {*}} {
+       } elseif {$s0 eq {*}} {
                set s0 _
        }
 
-       if {$s1 == {_}} {
+       if {$s1 eq {_}} {
                set s1 [string index $state 1]
-       } elseif {$s1 == {*}} {
+       } elseif {$s1 eq {*}} {
                set s1 _
        }
 
@@ -1061,10 +1168,10 @@ proc merge_state {path new_state} {
 }
 
 proc display_file {path state} {
-       global file_states file_lists status_active
+       global file_states file_lists selected_paths rescan_active
 
        set old_m [merge_state $path $state]
-       if {$status_active} return
+       if {$rescan_active > 0} return
 
        set s $file_states($path)
        set new_m [lindex $s 0]
@@ -1072,12 +1179,12 @@ proc display_file {path state} {
        set old_w [mapcol $old_m $path]
        set new_icon [mapicon $new_m $path]
 
-       if {$new_w != $old_w} {
+       if {$new_w ne $old_w} {
                set lno [lsearch -sorted $file_lists($old_w) $path]
                if {$lno >= 0} {
                        incr lno
                        $old_w conf -state normal
-                       $old_w delete $lno.0 [expr $lno + 1].0
+                       $old_w delete $lno.0 [expr {$lno + 1}].0
                        $old_w conf -state disabled
                }
 
@@ -1091,8 +1198,14 @@ proc display_file {path state} {
                        -name [lindex $s 1] \
                        -image $new_icon
                $new_w insert $lno.1 "[escape_path $path]\n"
+               if {[catch {set in_sel $selected_paths($path)}]} {
+                       set in_sel 0
+               }
+               if {$in_sel} {
+                       $new_w tag add in_sel $lno.0 [expr {$lno + 1}].0
+               }
                $new_w conf -state disabled
-       } elseif {$new_icon != [mapicon $old_m $path]} {
+       } elseif {$new_icon ne [mapicon $old_m $path]} {
                $new_w conf -state normal
                $new_w image conf [lindex $s 1] -image $new_icon
                $new_w conf -state disabled
@@ -1100,13 +1213,16 @@ proc display_file {path state} {
 }
 
 proc display_all_files {} {
-       global ui_index ui_other file_states file_lists
+       global ui_index ui_other
+       global file_states file_lists
+       global last_clicked selected_paths
 
        $ui_index conf -state normal
        $ui_other conf -state normal
 
        $ui_index delete 0.0 end
        $ui_other delete 0.0 end
+       set last_clicked {}
 
        set file_lists($ui_index) [list]
        set file_lists($ui_other) [list]
@@ -1116,52 +1232,67 @@ proc display_all_files {} {
                set m [lindex $s 0]
                set w [mapcol $m $path]
                lappend file_lists($w) $path
+               set lno [expr {[lindex [split [$w index end] .] 0] - 1}]
                $w image create end \
                        -align center -padx 5 -pady 1 \
                        -name [lindex $s 1] \
                        -image [mapicon $m $path]
                $w insert end "[escape_path $path]\n"
+               if {[catch {set in_sel $selected_paths($path)}]} {
+                       set in_sel 0
+               }
+               if {$in_sel} {
+                       $w tag add in_sel $lno.0 [expr {$lno + 1}].0
+               }
        }
 
        $ui_index conf -state disabled
        $ui_other conf -state disabled
 }
 
-proc update_index {pathList} {
-       global update_index_cp ui_status_value
+proc update_index {msg pathList after} {
+       global update_index_cp update_index_rsd ui_status_value
 
        if {![lock_index update]} return
 
        set update_index_cp 0
+       set update_index_rsd 0
+       set pathList [lsort $pathList]
        set totalCnt [llength $pathList]
        set batch [expr {int($totalCnt * .01) + 1}]
        if {$batch > 25} {set batch 25}
 
-       set ui_status_value "Including files ... 0/$totalCnt 0%"
        set ui_status_value [format \
-               "Including files ... %i/%i files (%.2f%%)" \
+               "$msg... %i/%i files (%.2f%%)" \
                $update_index_cp \
                $totalCnt \
                0.0]
        set fd [open "| git update-index --add --remove -z --stdin" w]
-       fconfigure $fd -blocking 0 -translation binary
+       fconfigure $fd \
+               -blocking 0 \
+               -buffering full \
+               -buffersize 512 \
+               -translation binary
        fileevent $fd writable [list \
                write_update_index \
                $fd \
                $pathList \
                $totalCnt \
                $batch \
+               $msg \
+               $after \
                ]
 }
 
-proc write_update_index {fd pathList totalCnt batch} {
-       global update_index_cp ui_status_value
-       global file_states ui_fname_value
+proc write_update_index {fd pathList totalCnt batch msg after} {
+       global update_index_cp update_index_rsd ui_status_value
+       global file_states current_diff
 
        if {$update_index_cp >= $totalCnt} {
                close $fd
                unlock_index
-               set ui_status_value {Ready.}
+               if {$update_index_rsd} reshow_diff
+               uplevel #0 $after
                return
        }
 
@@ -1171,26 +1302,32 @@ proc write_update_index {fd pathList totalCnt batch} {
                set path [lindex $pathList $update_index_cp]
                incr update_index_cp
 
-               switch -- [lindex $file_states($path) 0] {
-               AM -
-               _O {set new A*}
-               _M -
-               MM {set new M*}
+               switch -glob -- [lindex $file_states($path) 0] {
                AD -
+               MD -
                _D {set new D*}
-               default {continue}
+
+               _M -
+               MM -
+               M_ {set new M*}
+
+               _O -
+               AM -
+               A_ {set new A*}
+
+               ?? {continue}
                }
 
                puts -nonewline $fd $path
                puts -nonewline $fd "\0"
                display_file $path $new
-               if {$ui_fname_value == $path} {
-                       show_diff $path
+               if {$current_diff eq $path} {
+                       set update_index_rsd 1
                }
        }
 
        set ui_status_value [format \
-               "Including files ... %i/%i files (%.2f%%)" \
+               "$msg... %i/%i files (%.2f%%)" \
                $update_index_cp \
                $totalCnt \
                [expr {100.0 * $update_index_cp / $totalCnt}]]
@@ -1222,13 +1359,65 @@ proc load_all_remotes {} {
        set all_remotes [lsort -unique $all_remotes]
 }
 
-proc populate_remote_menu {m pfx op} {
-       global all_remotes
+proc populate_fetch_menu {m} {
+       global gitdir all_remotes repo_config
 
-       foreach remote $all_remotes {
-               $m add command -label "$pfx $remote..." \
-                       -command [list $op $remote] \
-                       -font font_ui
+       foreach r $all_remotes {
+               set enable 0
+               if {![catch {set a $repo_config(remote.$r.url)}]} {
+                       if {![catch {set a $repo_config(remote.$r.fetch)}]} {
+                               set enable 1
+                       }
+               } else {
+                       catch {
+                               set fd [open [file join $gitdir remotes $r] r]
+                               while {[gets $fd n] >= 0} {
+                                       if {[regexp {^Pull:[ \t]*([^:]+):} $n]} {
+                                               set enable 1
+                                               break
+                                       }
+                               }
+                               close $fd
+                       }
+               }
+
+               if {$enable} {
+                       $m add command \
+                               -label "Fetch from $r..." \
+                               -command [list fetch_from $r] \
+                               -font font_ui
+               }
+       }
+}
+
+proc populate_push_menu {m} {
+       global gitdir all_remotes repo_config
+
+       foreach r $all_remotes {
+               set enable 0
+               if {![catch {set a $repo_config(remote.$r.url)}]} {
+                       if {![catch {set a $repo_config(remote.$r.push)}]} {
+                               set enable 1
+                       }
+               } else {
+                       catch {
+                               set fd [open [file join $gitdir remotes $r] r]
+                               while {[gets $fd n] >= 0} {
+                                       if {[regexp {^Push:[ \t]*([^:]+):} $n]} {
+                                               set enable 1
+                                               break
+                                       }
+                               }
+                               close $fd
+                       }
+               }
+
+               if {$enable} {
+                       $m add command \
+                               -label "Push to $r..." \
+                               -command [list push_to $r] \
+                               -font font_ui
+               }
        }
 }
 
@@ -1237,8 +1426,8 @@ proc populate_pull_menu {m} {
 
        foreach remote $all_remotes {
                set rb {}
-               if {[array get repo_config remote.$remote.url] != {}} {
-                       if {[array get repo_config remote.$remote.fetch] != {}} {
+               if {[array get repo_config remote.$remote.url] ne {}} {
+                       if {[array get repo_config remote.$remote.fetch] ne {}} {
                                regexp {^([^:]+):} \
                                        [lindex $repo_config(remote.$remote.fetch) 0] \
                                        line rb
@@ -1257,7 +1446,7 @@ proc populate_pull_menu {m} {
 
                set rb_short $rb
                regsub ^refs/heads/ $rb {} rb_short
-               if {$rb_short != {}} {
+               if {$rb_short ne {}} {
                        $m add command \
                                -label "Branch $rb_short from $remote..." \
                                -command [list pull_remote $remote $rb] \
@@ -1350,17 +1539,17 @@ set max_status_desc 0
 foreach i {
                {__ i plain    "Unmodified"}
                {_M i mod      "Modified"}
-               {M_ i fulltick "Checked in"}
+               {M_ i fulltick "Included in commit"}
                {MM i parttick "Partially included"}
 
                {_O o plain    "Untracked"}
-               {A_ o fulltick "Added"}
+               {A_ o fulltick "Added by commit"}
                {AM o parttick "Partially added"}
                {AD o question "Added (but now gone)"}
 
                {_D i question "Missing"}
-               {D_ i removed  "Removed"}
-               {DD i removed  "Removed"}
+               {D_ i removed  "Removed by commit"}
+               {DD i removed  "Removed by commit"}
                {DO i removed  "Removed (still exists)"}
 
                {UM i merge    "Merge conflicts"}
@@ -1369,7 +1558,7 @@ foreach i {
        if {$max_status_desc < [string length [lindex $i 3]]} {
                set max_status_desc [string length [lindex $i 3]]
        }
-       if {[lindex $i 1] == {i}} {
+       if {[lindex $i 1] eq {i}} {
                set all_cols([lindex $i 0]) $ui_index
        } else {
                set all_cols([lindex $i 0]) $ui_other
@@ -1385,8 +1574,8 @@ unset filemask i
 
 proc is_MacOSX {} {
        global tcl_platform tk_library
-       if {$tcl_platform(platform) == {unix}
-               && $tcl_platform(os) == {Darwin}
+       if {$tcl_platform(platform) eq {unix}
+               && $tcl_platform(os) eq {Darwin}
                && [string match /Library/Frameworks/* $tk_library]} {
                return 1
        }
@@ -1443,7 +1632,7 @@ proc hook_failed_popup {hook msg} {
                -width 15 \
                -font font_ui \
                -command "destroy $w"
-       pack $w.ok -side bottom
+       pack $w.ok -side bottom -anchor e -pady 10 -padx 10
 
        bind $w <Visibility> "grab $w; focus $w"
        bind $w <Key-Return> "destroy $w"
@@ -1480,7 +1669,8 @@ proc console_init {w} {
                -font font_diff \
                -state disabled \
                -yscrollcommand [list $w.m.sby set]
-       label $w.m.s -anchor w \
+       label $w.m.s -text {Working... please wait...} \
+               -anchor w \
                -justify left \
                -font font_uibold
        scrollbar $w.m.sby -command [list $w.m.t yview]
@@ -1505,12 +1695,11 @@ proc console_init {w} {
                        $w.m.t tag remove sel 0.0 end
                "
 
-       button $w.ok -text {Running...} \
-               -width 15 \
+       button $w.ok -text {Close} \
                -font font_ui \
                -state disabled \
                -command "destroy $w"
-       pack $w.ok -side bottom
+       pack $w.ok -side bottom -anchor e -pady 10 -padx 10
 
        bind_button3 $w.m.t "tk_popup $w.ctxm %X %Y"
        bind $w.m.t <$M1B-Key-a> "$w.m.t tag add sel 0.0 end;break"
@@ -1528,7 +1717,7 @@ proc console_exec {w cmd {after {}}} {
        # -- Windows tosses the enviroment when we exec our child.
        #    But most users need that so we have to relogin. :-(
        #
-       if {$tcl_platform(platform) == {windows}} {
+       if {$tcl_platform(platform) eq {windows}} {
                set cmd [list sh --login -c "cd \"[pwd]\" && [join $cmd { }]"]
        }
 
@@ -1546,7 +1735,7 @@ proc console_read {w fd after} {
        global console_cr console_data
 
        set buf [read $fd]
-       if {$buf != {}} {
+       if {$buf ne {}} {
                if {![winfo exists $w]} {console_init $w}
                $w.m.t conf -state normal
                set c 0
@@ -1554,8 +1743,8 @@ proc console_read {w fd after} {
                while {$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 $n + 1]}
+                       if {$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]
@@ -1579,18 +1768,16 @@ proc console_read {w fd after} {
                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 != {}} {
+               if {$after ne {}} {
                        uplevel #0 $after $ok
                }
                return
@@ -1609,12 +1796,12 @@ proc do_gitk {} {
 
        set ui_status_value $starting_gitk_msg
        after 10000 {
-               if {$ui_status_value == $starting_gitk_msg} {
+               if {$ui_status_value eq $starting_gitk_msg} {
                        set ui_status_value {Ready.}
                }
        }
 
-       if {$tcl_platform(platform) == {windows}} {
+       if {$tcl_platform(platform) eq {windows}} {
                exec sh -c gitk &
        } else {
                exec gitk &
@@ -1641,13 +1828,13 @@ proc do_quit {} {
        #
        set save [file join $gitdir GITGUI_MSG]
        set msg [string trim [$ui_comm get 0.0 end]]
-       if {[$ui_comm edit modified] && $msg != {}} {
+       if {[$ui_comm edit modified] && $msg ne {}} {
                catch {
                        set fd [open $save w]
                        puts $fd [string trim [$ui_comm get 0.0 end]]
                        close $fd
                }
-       } elseif {$msg == {} && [file exists $save]} {
+       } elseif {$msg eq {} && [file exists $save]} {
                file delete $save
        }
 
@@ -1660,7 +1847,7 @@ proc do_quit {} {
        if {[catch {set rc_geometry $repo_config(gui.geometry)}]} {
                set rc_geometry {}
        }
-       if {$cfg_geometry != $rc_geometry} {
+       if {$cfg_geometry ne $rc_geometry} {
                catch {exec git repo-config gui.geometry $cfg_geometry}
        }
 
@@ -1668,7 +1855,7 @@ proc do_quit {} {
 }
 
 proc do_rescan {} {
-       update_status
+       rescan {set ui_status_value {Ready.}}
 }
 
 proc do_include_all {} {
@@ -1687,10 +1874,13 @@ proc do_include_all {} {
                _D {lappend pathList $path}
                }
        }
-       if {$pathList == {}} {
+       if {$pathList eq {}} {
                unlock_index
        } else {
-               update_index $pathList
+               update_index \
+                       "Including all modified files" \
+                       $pathList \
+                       {set ui_status_value {Ready to commit.}}
        }
 }
 
@@ -1699,7 +1889,7 @@ set GIT_COMMITTER_IDENT {}
 proc do_signoff {} {
        global ui_comm GIT_COMMITTER_IDENT
 
-       if {$GIT_COMMITTER_IDENT == {}} {
+       if {$GIT_COMMITTER_IDENT eq {}} {
                if {[catch {set me [exec git var GIT_COMMITTER_IDENT]} err]} {
                        error_popup "Unable to obtain your identity:\n\n$err"
                        return
@@ -1713,9 +1903,9 @@ proc do_signoff {} {
 
        set sob "Signed-off-by: $GIT_COMMITTER_IDENT"
        set last [$ui_comm get {end -1c linestart} {end -1c}]
-       if {$last != $sob} {
+       if {$last ne $sob} {
                $ui_comm edit separator
-               if {$last != {}
+               if {$last ne {}
                        && ![regexp {^[A-Z][A-Za-z]*-[A-Za-z-]+: *} $last]} {
                        $ui_comm insert end "\n"
                }
@@ -1738,12 +1928,18 @@ proc do_options {} {
        global repo_config global_config
        global repo_config_new global_config_new
 
-       load_config 1
        array unset repo_config_new
        array unset global_config_new
        foreach name [array names repo_config] {
                set repo_config_new($name) $repo_config($name)
        }
+       load_config 1
+       foreach name [array names repo_config] {
+               switch -- $name {
+               gui.diffcontext {continue}
+               }
+               set repo_config_new($name) $repo_config($name)
+       }
        foreach name [array names global_config] {
                set global_config_new($name) $global_config($name)
        }
@@ -1784,18 +1980,37 @@ proc do_options {} {
        pack $w.global -side right -fill both -expand 1 -pady 5 -padx 5
 
        foreach option {
-               {pullsummary {Show Pull Summary}}
-               {trustmtime {Trust File Modification Timestamps}}
+               {b partialinclude {Allow Partially Included Files}}
+               {b pullsummary {Show Pull Summary}}
+               {b trustmtime  {Trust File Modification Timestamps}}
+               {i diffcontext {Number of Diff Context Lines}}
                } {
-               set name [lindex $option 0]
-               set text [lindex $option 1]
+               set type [lindex $option 0]
+               set name [lindex $option 1]
+               set text [lindex $option 2]
                foreach f {repo global} {
-                       checkbutton $w.$f.$name -text $text \
-                               -variable ${f}_config_new(gui.$name) \
-                               -onvalue true \
-                               -offvalue false \
-                               -font font_ui
-                       pack $w.$f.$name -side top -anchor w
+                       switch $type {
+                       b {
+                               checkbutton $w.$f.$name -text $text \
+                                       -variable ${f}_config_new(gui.$name) \
+                                       -onvalue true \
+                                       -offvalue false \
+                                       -font font_ui
+                               pack $w.$f.$name -side top -anchor w
+                       }
+                       i {
+                               frame $w.$f.$name
+                               label $w.$f.$name.l -text "$text:" -font font_ui
+                               pack $w.$f.$name.l -side left -anchor w -fill x
+                               spinbox $w.$f.$name.v \
+                                       -textvariable ${f}_config_new(gui.$name) \
+                                       -from 1 -to 99 -increment 1 \
+                                       -width 3 \
+                                       -font font_ui
+                               pack $w.$f.$name.v -side right -anchor e
+                               pack $w.$f.$name -side top -anchor w -fill x
+                       }
+                       }
                }
        }
 
@@ -1861,37 +2076,213 @@ proc do_save_config {w} {
        if {[catch {save_config} err]} {
                error_popup "Failed to completely save options:\n\n$err"
        }
+       reshow_diff
        destroy $w
 }
 
-# shift == 1: left click
-#          3: right click  
-proc click {w x y shift wx wy} {
-       global ui_index ui_other file_lists
+proc do_windows_shortcut {} {
+       global gitdir appname argv0
+
+       set reponame [lindex [file split \
+               [file normalize [file dirname $gitdir]]] \
+               end]
+
+       if {[catch {
+               set desktop [exec cygpath \
+                       --windows \
+                       --absolute \
+                       --long-name \
+                       --desktop]
+               }]} {
+                       set desktop .
+       }
+       set fn [tk_getSaveFile \
+               -parent . \
+               -title "$appname ($reponame): Create Desktop Icon" \
+               -initialdir $desktop \
+               -initialfile "Git $reponame.bat"]
+       if {$fn != {}} {
+               if {[catch {
+                               set fd [open $fn w]
+                               set sh [exec cygpath \
+                                       --windows \
+                                       --absolute \
+                                       --long-name \
+                                       /bin/sh]
+                               set me [exec cygpath \
+                                       --unix \
+                                       --absolute \
+                                       $argv0]
+                               set gd [exec cygpath \
+                                       --unix \
+                                       --absolute \
+                                       $gitdir]
+                               regsub -all ' $me "'\\''" me
+                               regsub -all ' $gd "'\\''" gd
+                               puts -nonewline $fd "\"$sh\" --login -c \""
+                               puts -nonewline $fd "GIT_DIR='$gd'"
+                               puts -nonewline $fd " '$me'"
+                               puts $fd "&\""
+                               close $fd
+                       } err]} {
+                       error_popup "Cannot write script:\n\n$err"
+               }
+       }
+}
+
+proc do_macosx_app {} {
+       global gitdir appname argv0 env
+
+       set reponame [lindex [file split \
+               [file normalize [file dirname $gitdir]]] \
+               end]
+
+       set fn [tk_getSaveFile \
+               -parent . \
+               -title "$appname ($reponame): Create Desktop Icon" \
+               -initialdir [file join $env(HOME) Desktop] \
+               -initialfile "Git $reponame.app"]
+       if {$fn != {}} {
+               if {[catch {
+                               set Contents [file join $fn Contents]
+                               set MacOS [file join $Contents MacOS]
+                               set exe [file join $MacOS git-gui]
+
+                               file mkdir $MacOS
+
+                               set fd [open [file join $Contents PkgInfo] w]
+                               puts -nonewline $fd {APPL????}
+                               close $fd
+
+                               set fd [open [file join $Contents Info.plist] w]
+                               puts $fd {<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+       <key>CFBundleDevelopmentRegion</key>
+       <string>English</string>
+       <key>CFBundleExecutable</key>
+       <string>git-gui</string>
+       <key>CFBundleIdentifier</key>
+       <string>org.spearce.git-gui</string>
+       <key>CFBundleInfoDictionaryVersion</key>
+       <string>6.0</string>
+       <key>CFBundlePackageType</key>
+       <string>APPL</string>
+       <key>CFBundleSignature</key>
+       <string>????</string>
+       <key>CFBundleVersion</key>
+       <string>1.0</string>
+       <key>NSPrincipalClass</key>
+       <string>NSApplication</string>
+</dict>
+</plist>}
+                               close $fd
+
+                               set fd [open $exe w]
+                               set gd [file normalize $gitdir]
+                               set ep [file normalize [exec git --exec-path]]
+                               regsub -all ' $gd "'\\''" gd
+                               regsub -all ' $ep "'\\''" ep
+                               puts $fd "#!/bin/sh"
+                               foreach name [array names env] {
+                                       if {[string match GIT_* $name]} {
+                                               regsub -all ' $env($name) "'\\''" v
+                                               puts $fd "export $name='$v'"
+                                       }
+                               }
+                               puts $fd "export PATH='$ep':\$PATH"
+                               puts $fd "export GIT_DIR='$gd'"
+                               puts $fd "exec [file normalize $argv0]"
+                               close $fd
+
+                               file attributes $exe -permissions u+x,g+x,o+x
+                       } err]} {
+                       error_popup "Cannot write icon:\n\n$err"
+               }
+       }
+}
+
+proc toggle_or_diff {w x y} {
+       global file_lists ui_index ui_other
+       global last_clicked selected_paths
 
        set pos [split [$w index @$x,$y] .]
        set lno [lindex $pos 0]
        set col [lindex $pos 1]
-       set path [lindex $file_lists($w) [expr $lno - 1]]
-       if {$path == {}} return
+       set path [lindex $file_lists($w) [expr {$lno - 1}]]
+       if {$path eq {}} {
+               set last_clicked {}
+               return
+       }
 
-       if {$col > 0 && $shift == 1} {
+       set last_clicked [list $w $lno]
+       array unset selected_paths
+       $ui_index tag remove in_sel 0.0 end
+       $ui_other tag remove in_sel 0.0 end
+
+       if {$col == 0} {
+               update_index \
+                       "Including [short_path $path]" \
+                       [list $path] \
+                       {set ui_status_value {Ready.}}
+       } else {
                show_diff $path $w $lno
        }
 }
 
-proc unclick {w x y} {
+proc add_one_to_selection {w x y} {
        global file_lists
+       global last_clicked selected_paths
 
        set pos [split [$w index @$x,$y] .]
        set lno [lindex $pos 0]
        set col [lindex $pos 1]
-       set path [lindex $file_lists($w) [expr $lno - 1]]
-       if {$path == {}} return
+       set path [lindex $file_lists($w) [expr {$lno - 1}]]
+       if {$path eq {}} {
+               set last_clicked {}
+               return
+       }
 
-       if {$col == 0} {
-               update_index [list $path]
+       set last_clicked [list $w $lno]
+       if {[catch {set in_sel $selected_paths($path)}]} {
+               set in_sel 0
+       }
+       if {$in_sel} {
+               unset selected_paths($path)
+               $w tag remove in_sel $lno.0 [expr {$lno + 1}].0
+       } else {
+               set selected_paths($path) 1
+               $w tag add in_sel $lno.0 [expr {$lno + 1}].0
+       }
+}
+
+proc add_range_to_selection {w x y} {
+       global file_lists
+       global last_clicked selected_paths
+
+       if {[lindex $last_clicked 0] ne $w} {
+               toggle_or_diff $w $x $y
+               return
+       }
+
+       set pos [split [$w index @$x,$y] .]
+       set lno [lindex $pos 0]
+       set lc [lindex $last_clicked 1]
+       if {$lc < $lno} {
+               set begin $lc
+               set end $lno
+       } else {
+               set begin $lno
+               set end $lc
+       }
+
+       foreach path [lrange $file_lists($w) \
+               [expr {$begin - 1}] \
+               [expr {$end - 1}]] {
+               set selected_paths($path) 1
        }
+       $w tag add in_sel $begin.0 [expr {$end + 1}].0
 }
 
 ######################################################################
@@ -1912,7 +2303,7 @@ font create font_diffbold
 
 set M1B M1
 set M1T M1
-if {$tcl_platform(platform) == {windows}} {
+if {$tcl_platform(platform) eq {windows}} {
        set M1B Control
        set M1T Ctrl
 } elseif {[is_MacOSX]} {
@@ -1942,6 +2333,8 @@ proc apply_config {} {
 
 set default_config(gui.trustmtime) false
 set default_config(gui.pullsummary) true
+set default_config(gui.partialinclude) false
+set default_config(gui.diffcontext) 5
 set default_config(gui.fontui) [font configure font_ui]
 set default_config(gui.fontdiff) [font configure font_diff]
 set font_descs {
@@ -1976,6 +2369,18 @@ if {!$single_commit} {
        .mbar.project add command -label {Repack Database} \
                -command do_repack \
                -font font_ui
+
+       if {$tcl_platform(platform) eq {windows}} {
+               .mbar.project add command \
+                       -label {Create Desktop Icon} \
+                       -command do_windows_shortcut \
+                       -font font_ui
+       } elseif {[is_MacOSX]} {
+               .mbar.project add command \
+                       -label {Create Desktop Icon} \
+                       -command do_macosx_app \
+                       -font font_ui
+       }
 }
 .mbar.project add command -label Quit \
        -command do_quit \
@@ -2101,8 +2506,13 @@ pack .vpane.files.other.sb -side right -fill y
 pack $ui_other -side left -fill both -expand 1
 .vpane.files add .vpane.files.other -sticky nsew
 
-$ui_index tag conf in_diff -font font_uibold
-$ui_other tag conf in_diff -font font_uibold
+foreach i [list $ui_index $ui_other] {
+       $i tag conf in_diff -font font_uibold
+       $i tag conf in_sel \
+               -background [$i cget -foreground] \
+               -foreground [$i cget -background]
+}
+unset i
 
 # -- Diff and Commit Area
 frame .vpane.lower -height 300 -width 400
@@ -2162,13 +2572,18 @@ label $ui_coml -text {Commit Message:} \
        -anchor w \
        -justify left \
        -font font_ui
-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:}}
-}}
+proc trace_commit_type {varname args} {
+       global ui_coml commit_type
+       switch -glob -- $commit_type {
+       initial       {set txt {Initial Commit Message:}}
+       amend         {set txt {Amended Commit Message:}}
+       amend-initial {set txt {Amended Initial Commit Message:}}
+       merge         {set txt {Merge Commit Message:}}
+       *             {set txt {Commit Message:}}
+       }
+       $ui_coml conf -text $txt
+}
+trace add variable commit_type write trace_commit_type
 text $ui_comm -background white -borderwidth 1 \
        -undo true \
        -maxundo 20 \
@@ -2186,61 +2601,105 @@ pack .vpane.lower.commarea.buffer -side left -fill y
 
 # -- Commit Message Buffer Context Menu
 #
-menu $ui_comm.ctxm -tearoff 0
-$ui_comm.ctxm add command -label "Cut" \
+set ctxm .vpane.lower.commarea.buffer.ctxm
+menu $ctxm -tearoff 0
+$ctxm add command \
+       -label {Cut} \
        -font font_ui \
-       -command "tk_textCut $ui_comm"
-$ui_comm.ctxm add command -label "Copy" \
+       -command {tk_textCut $ui_comm}
+$ctxm add command \
+       -label {Copy} \
        -font font_ui \
-       -command "tk_textCopy $ui_comm"
-$ui_comm.ctxm add command -label "Paste" \
+       -command {tk_textCopy $ui_comm}
+$ctxm add command \
+       -label {Paste} \
        -font font_ui \
-       -command "tk_textPaste $ui_comm"
-$ui_comm.ctxm add command -label "Delete" \
+       -command {tk_textPaste $ui_comm}
+$ctxm add command \
+       -label {Delete} \
        -font font_ui \
-       -command "$ui_comm delete sel.first sel.last"
-$ui_comm.ctxm add separator
-$ui_comm.ctxm add command -label "Select All" \
+       -command {$ui_comm delete sel.first sel.last}
+$ctxm add separator
+$ctxm add command \
+       -label {Select All} \
        -font font_ui \
-       -command "$ui_comm tag add sel 0.0 end"
-$ui_comm.ctxm add command -label "Copy All" \
+       -command {$ui_comm tag add sel 0.0 end}
+$ctxm add command \
+       -label {Copy All} \
        -font font_ui \
-       -command "
+       -command {
                $ui_comm tag add sel 0.0 end
                tk_textCopy $ui_comm
                $ui_comm tag remove sel 0.0 end
-       "
-$ui_comm.ctxm add separator
-$ui_comm.ctxm add command -label "Sign Off" \
+       }
+$ctxm add separator
+$ctxm add command \
+       -label {Sign Off} \
        -font font_ui \
        -command do_signoff
-bind_button3 $ui_comm "tk_popup $ui_comm.ctxm %X %Y"
+bind_button3 $ui_comm "tk_popup $ctxm %X %Y"
 
 # -- Diff Header
-set ui_fname_value {}
-set ui_fstatus_value {}
+set current_diff {}
+set diff_actions [list]
+proc current_diff_trace {varname args} {
+       global current_diff diff_actions file_states
+       if {$current_diff eq {}} {
+               set s {}
+               set f {}
+               set p {}
+               set o disabled
+       } else {
+               set p $current_diff
+               set s [mapdesc [lindex $file_states($p) 0] $p]
+               set f {File:}
+               set p [escape_path $p]
+               set o normal
+       }
+
+       .vpane.lower.diff.header.status configure -text $s
+       .vpane.lower.diff.header.file configure -text $f
+       .vpane.lower.diff.header.path configure -text $p
+       foreach w $diff_actions {
+               uplevel #0 $w $o
+       }
+}
+trace add variable current_diff write current_diff_trace
+
 frame .vpane.lower.diff.header -background orange
-label .vpane.lower.diff.header.l1 -text {File:} \
-       -background orange \
-       -font font_ui
-label .vpane.lower.diff.header.l2 -textvariable ui_fname_value \
+label .vpane.lower.diff.header.status \
        -background orange \
+       -width $max_status_desc \
        -anchor w \
        -justify left \
        -font font_ui
-label .vpane.lower.diff.header.l3 -text {Status:} \
+label .vpane.lower.diff.header.file \
        -background orange \
+       -anchor w \
+       -justify left \
        -font font_ui
-label .vpane.lower.diff.header.l4 -textvariable ui_fstatus_value \
+label .vpane.lower.diff.header.path \
        -background orange \
-       -width $max_status_desc \
        -anchor w \
        -justify left \
        -font font_ui
-pack .vpane.lower.diff.header.l1 -side left
-pack .vpane.lower.diff.header.l2 -side left -fill x
-pack .vpane.lower.diff.header.l4 -side right
-pack .vpane.lower.diff.header.l3 -side right
+pack .vpane.lower.diff.header.status -side left
+pack .vpane.lower.diff.header.file -side left
+pack .vpane.lower.diff.header.path -fill x
+set ctxm .vpane.lower.diff.header.ctxm
+menu $ctxm -tearoff 0
+$ctxm add command \
+       -label {Copy} \
+       -font font_ui \
+       -command {
+               clipboard clear
+               clipboard append \
+                       -format STRING \
+                       -type STRING \
+                       -- $current_diff
+       }
+lappend diff_actions [list $ctxm entryconf [$ctxm index last] -state]
+bind_button3 .vpane.lower.diff.header.path "tk_popup $ctxm %X %Y"
 
 # -- Diff Body
 frame .vpane.lower.diff.body
@@ -2270,33 +2729,63 @@ $ui_diff tag conf bold -font font_diffbold
 
 # -- Diff Body Context Menu
 #
-menu $ui_diff.ctxm -tearoff 0
-$ui_diff.ctxm add command -label "Copy" \
+set ctxm .vpane.lower.diff.body.ctxm
+menu $ctxm -tearoff 0
+$ctxm add command \
+       -label {Copy} \
        -font font_ui \
-       -command "tk_textCopy $ui_diff"
-$ui_diff.ctxm add command -label "Select All" \
+       -command {tk_textCopy $ui_diff}
+lappend diff_actions [list $ctxm entryconf [$ctxm index last] -state]
+$ctxm add command \
+       -label {Select All} \
        -font font_ui \
-       -command "$ui_diff tag add sel 0.0 end"
-$ui_diff.ctxm add command -label "Copy All" \
+       -command {$ui_diff tag add sel 0.0 end}
+lappend diff_actions [list $ctxm entryconf [$ctxm index last] -state]
+$ctxm add command \
+       -label {Copy All} \
        -font font_ui \
-       -command "
+       -command {
                $ui_diff tag add sel 0.0 end
                tk_textCopy $ui_diff
                $ui_diff tag remove sel 0.0 end
-       "
-$ui_diff.ctxm add separator
-$ui_diff.ctxm add command -label "Decrease Font Size" \
+       }
+lappend diff_actions [list $ctxm entryconf [$ctxm index last] -state]
+$ctxm add separator
+$ctxm add command \
+       -label {Decrease Font Size} \
        -font font_ui \
        -command {incr_font_size font_diff -1}
-$ui_diff.ctxm add command -label "Increase Font Size" \
+lappend diff_actions [list $ctxm entryconf [$ctxm index last] -state]
+$ctxm add command \
+       -label {Increase Font Size} \
        -font font_ui \
        -command {incr_font_size font_diff 1}
-$ui_diff.ctxm add command -label {Options...} \
+lappend diff_actions [list $ctxm entryconf [$ctxm index last] -state]
+$ctxm add separator
+$ctxm add command \
+       -label {Show Less Context} \
+       -font font_ui \
+       -command {if {$repo_config(gui.diffcontext) >= 2} {
+               incr repo_config(gui.diffcontext) -1
+               reshow_diff
+       }}
+lappend diff_actions [list $ctxm entryconf [$ctxm index last] -state]
+$ctxm add command \
+       -label {Show More Context} \
+       -font font_ui \
+       -command {
+               incr repo_config(gui.diffcontext)
+               reshow_diff
+       }
+lappend diff_actions [list $ctxm entryconf [$ctxm index last] -state]
+$ctxm add separator
+$ctxm add command -label {Options...} \
        -font font_ui \
        -command do_options
-bind_button3 $ui_diff "tk_popup $ui_diff.ctxm %X %Y"
+bind_button3 $ui_diff "tk_popup $ctxm %X %Y"
 
 # -- Status Bar
+#
 set ui_status_value {Initializing...}
 label .status -textvariable ui_status_value \
        -anchor w \
@@ -2307,6 +2796,7 @@ label .status -textvariable ui_status_value \
 pack .status -anchor w -side bottom -fill x
 
 # -- Load geometry
+#
 catch {
 set gm $repo_config(gui.geometry)
 wm geometry . [lindex $gm 0]
@@ -2320,6 +2810,7 @@ unset gm
 }
 
 # -- Key Bindings
+#
 bind $ui_comm <$M1B-Key-Return> {do_commit;break}
 bind $ui_comm <$M1B-Key-i> {do_include_all;break}
 bind $ui_comm <$M1B-Key-I> {do_include_all;break}
@@ -2359,21 +2850,22 @@ 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 <ButtonRelease-1> {unclick %W %x %y; break}
-       bind_button3 $i {click %W %x %y 3 %X %Y; break}
+       bind $i <Button-1>       "toggle_or_diff         $i %x %y; break"
+       bind $i <$M1B-Button-1>  "add_one_to_selection   $i %x %y; break"
+       bind $i <Shift-Button-1> "add_range_to_selection $i %x %y; break"
 }
 unset i
 
 set file_lists($ui_index) [list]
 set file_lists($ui_other) [list]
+set current_diff {}
 
 wm title . "$appname ([file normalize [file dirname $gitdir]])"
 focus -force $ui_comm
 if {!$single_commit} {
        load_all_remotes
-       populate_remote_menu .mbar.fetch From fetch_from
-       populate_remote_menu .mbar.push To push_to
+       populate_fetch_menu .mbar.fetch
        populate_pull_menu .mbar.pull
+       populate_push_menu .mbar.push
 }
-after 1 update_status
+after 1 do_rescan