git-gui: Refactor 'exec git subcmd' idiom.
[gitweb.git] / git-gui.sh
index ae883f90bd0a755b7cdec98d847491bc001470b0..7ecb98b900576ed6abc8b4e4af4333a209769ba6 100755 (executable)
@@ -2,7 +2,7 @@
 # Tcl ignores the next line -*- tcl -*- \
 exec wish "$0" -- "$@"
 
-set appvers {@@GIT_VERSION@@}
+set appvers {@@GITGUI_VERSION@@}
 set copyright {
 Copyright © 2006, 2007 Shawn Pearce, Paul Mackerras.
 
@@ -26,7 +26,9 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA}
 
 set _appname [lindex [file split $argv0] end]
 set _gitdir {}
+set _gitexec {}
 set _reponame {}
+set _iscygwin {}
 
 proc appname {} {
        global _appname
@@ -41,11 +43,72 @@ proc gitdir {args} {
        return [eval [concat [list file join $_gitdir] $args]]
 }
 
+proc gitexec {args} {
+       global _gitexec
+       if {$_gitexec eq {}} {
+               if {[catch {set _gitexec [git --exec-path]} err]} {
+                       error "Git not installed?\n\n$err"
+               }
+       }
+       if {$args eq {}} {
+               return $_gitexec
+       }
+       return [eval [concat [list file join $_gitexec] $args]]
+}
+
 proc reponame {} {
        global _reponame
        return $_reponame
 }
 
+proc is_MacOSX {} {
+       global tcl_platform tk_library
+       if {[tk windowingsystem] eq {aqua}} {
+               return 1
+       }
+       return 0
+}
+
+proc is_Windows {} {
+       global tcl_platform
+       if {$tcl_platform(platform) eq {windows}} {
+               return 1
+       }
+       return 0
+}
+
+proc is_Cygwin {} {
+       global tcl_platform _iscygwin
+       if {$_iscygwin eq {}} {
+               if {$tcl_platform(platform) eq {windows}} {
+                       if {[catch {set p [exec cygpath --windir]} err]} {
+                               set _iscygwin 0
+                       } else {
+                               set _iscygwin 1
+                       }
+               } else {
+                       set _iscygwin 0
+               }
+       }
+       return $_iscygwin
+}
+
+proc is_enabled {option} {
+       global enabled_options
+       if {[catch {set on $enabled_options($option)}]} {return 0}
+       return $on
+}
+
+proc enable_option {option} {
+       global enabled_options
+       set enabled_options($option) 1
+}
+
+proc disable_option {option} {
+       global enabled_options
+       set enabled_options($option) 0
+}
+
 ######################################################################
 ##
 ## config
@@ -60,13 +123,24 @@ proc is_many_config {name} {
        }
 }
 
+proc is_config_true {name} {
+       global repo_config
+       if {[catch {set v $repo_config($name)}]} {
+               return 0
+       } elseif {$v eq {true} || $v eq {1} || $v eq {yes}} {
+               return 1
+       } else {
+               return 0
+       }
+}
+
 proc load_config {include_global} {
        global repo_config global_config default_config
 
        array unset global_config
        if {$include_global} {
                catch {
-                       set fd_rc [open "| git repo-config --global --list" r]
+                       set fd_rc [open "| git config --global --list" r]
                        while {[gets $fd_rc line] >= 0} {
                                if {[regexp {^([^=]+)=(.*)$} $line line name value]} {
                                        if {[is_many_config $name]} {
@@ -82,7 +156,7 @@ proc load_config {include_global} {
 
        array unset repo_config
        catch {
-               set fd_rc [open "| git repo-config --list" r]
+               set fd_rc [open "| git config --list" r]
                while {[gets $fd_rc line] >= 0} {
                        if {[regexp {^([^=]+)=(.*)$} $line line name value]} {
                                if {[is_many_config $name]} {
@@ -128,14 +202,14 @@ proc save_config {} {
                set value $global_config_new($name)
                if {$value ne $global_config($name)} {
                        if {$value eq $default_config($name)} {
-                               catch {exec git repo-config --global --unset $name}
+                               catch {git config --global --unset $name}
                        } else {
                                regsub -all "\[{}\]" $value {"} value
-                               exec git repo-config --global $name $value
+                               git config --global $name $value
                        }
                        set global_config($name) $value
                        if {$value eq $repo_config($name)} {
-                               catch {exec git repo-config --unset $name}
+                               catch {git config --unset $name}
                                set repo_config($name) $value
                        }
                }
@@ -145,16 +219,24 @@ proc save_config {} {
                set value $repo_config_new($name)
                if {$value ne $repo_config($name)} {
                        if {$value eq $global_config($name)} {
-                               catch {exec git repo-config --unset $name}
+                               catch {git config --unset $name}
                        } else {
                                regsub -all "\[{}\]" $value {"} value
-                               exec git repo-config $name $value
+                               git config $name $value
                        }
                        set repo_config($name) $value
                }
        }
 }
 
+######################################################################
+##
+## handy utils
+
+proc git {args} {
+       return [eval exec git $args]
+}
+
 proc error_popup {msg} {
        set title [appname]
        if {[reponame] ne {}} {
@@ -218,11 +300,14 @@ proc ask_popup {msg} {
 ## repository setup
 
 if {   [catch {set _gitdir $env(GIT_DIR)}]
-       && [catch {set _gitdir [exec git rev-parse --git-dir]} err]} {
+       && [catch {set _gitdir [git rev-parse --git-dir]} err]} {
        catch {wm withdraw .}
        error_popup "Cannot find the git directory:\n\n$err"
        exit 1
 }
+if {![file isdirectory $_gitdir] && [is_Cygwin]} {
+       catch {set _gitdir [exec cygpath --unix $_gitdir]}
+}
 if {![file isdirectory $_gitdir]} {
        catch {wm withdraw .}
        error_popup "Git directory not found:\n\n$_gitdir"
@@ -230,7 +315,7 @@ if {![file isdirectory $_gitdir]} {
 }
 if {[lindex [file split $_gitdir] end] ne {.git}} {
        catch {wm withdraw .}
-       error_popup "Cannot use funny .git directory:\n\n$gitdir"
+       error_popup "Cannot use funny .git directory:\n\n$_gitdir"
        exit 1
 }
 if {[catch {cd [file dirname $_gitdir]} err]} {
@@ -242,11 +327,6 @@ set _reponame [lindex [file split \
        [file normalize [file dirname $_gitdir]]] \
        end]
 
-set single_commit 0
-if {[appname] eq {git-citool}} {
-       set single_commit 1
-}
-
 ######################################################################
 ##
 ## task management
@@ -293,7 +373,7 @@ proc repository_state {ctvar hdvar mhvar} {
 
        set mh [list]
 
-       if {[catch {set current_branch [exec git symbolic-ref HEAD]}]} {
+       if {[catch {set current_branch [git symbolic-ref HEAD]}]} {
                set current_branch {}
        } else {
                regsub ^refs/((heads|tags|remotes)/)? \
@@ -302,7 +382,7 @@ proc repository_state {ctvar hdvar mhvar} {
                        current_branch
        }
 
-       if {[catch {set hd [exec git rev-parse --verify HEAD]}]} {
+       if {[catch {set hd [git rev-parse --verify HEAD]}]} {
                set hd {}
                set ct initial
                return
@@ -330,7 +410,7 @@ proc PARENT {} {
                return $p
        }
        if {$empty_tree eq {}} {
-               set empty_tree [exec git mktree << {}]
+               set empty_tree [git mktree << {}]
        }
        return $empty_tree
 }
@@ -366,6 +446,11 @@ proc rescan {after {honor_trustmtime 1}} {
                $ui_comm edit modified false
        }
 
+       if {[is_enabled branch]} {
+               load_all_heads
+               populate_branch_menu
+       }
+
        if {$honor_trustmtime && $repo_config(gui.trustmtime) eq {true}} {
                rescan_stage2 {} $after
        } else {
@@ -965,7 +1050,7 @@ proc committer_ident {} {
        global GIT_COMMITTER_IDENT
 
        if {$GIT_COMMITTER_IDENT eq {}} {
-               if {[catch {set me [exec git var GIT_COMMITTER_IDENT]} err]} {
+               if {[catch {set me [git var GIT_COMMITTER_IDENT]} err]} {
                        error_popup "Unable to obtain your identity:\n\n$err"
                        return {}
                }
@@ -1065,7 +1150,7 @@ A good commit message has the following format:
        # On Cygwin [file executable] might lie so we need to ask
        # the shell if the hook is executable.  Yes that's annoying.
        #
-       if {[is_Windows] && [file isfile $pchook]} {
+       if {[is_Cygwin] && [file isfile $pchook]} {
                set pchook [list sh -c [concat \
                        "if test -x \"$pchook\";" \
                        "then exec \"$pchook\" 2>&1;" \
@@ -1115,7 +1200,7 @@ proc commit_writetree {curHEAD msg} {
 
 proc commit_committree {fd_wt curHEAD msg} {
        global HEAD PARENT MERGE_HEAD commit_type
-       global single_commit all_heads current_branch
+       global all_heads current_branch
        global ui_status_value ui_comm selected_commit_type
        global file_states selected_paths rescan_active
        global repo_config
@@ -1198,13 +1283,13 @@ proc commit_committree {fd_wt curHEAD msg} {
        # -- Let rerere do its thing.
        #
        if {[file isdirectory [gitdir rr-cache]]} {
-               catch {exec git rerere}
+               catch {git rerere}
        }
 
        # -- Run the post-commit hook.
        #
        set pchook [gitdir hooks post-commit]
-       if {[is_Windows] && [file isfile $pchook]} {
+       if {[is_Cygwin] && [file isfile $pchook]} {
                set pchook [list sh -c [concat \
                        "if test -x \"$pchook\";" \
                        "then exec \"$pchook\";" \
@@ -1220,7 +1305,7 @@ proc commit_committree {fd_wt curHEAD msg} {
        $ui_comm edit reset
        $ui_comm edit modified false
 
-       if {$single_commit} do_quit
+       if {[is_enabled singlecommit]} do_quit
 
        # -- Update in memory status
        #
@@ -1315,6 +1400,7 @@ proc mapdesc {state path} {
 }
 
 proc escape_path {path} {
+       regsub -all {\\} $path "\\\\" path
        regsub -all "\n" $path "\\n" path
        return $path
 }
@@ -1816,7 +1902,7 @@ proc do_create_branch_action {w} {
                focus $w.desc.name_t
                return
        }
-       if {![catch {exec git show-ref --verify -- "refs/heads/$newbranch"}]} {
+       if {![catch {git show-ref --verify -- "refs/heads/$newbranch"}]} {
                tk_messageBox \
                        -icon error \
                        -type ok \
@@ -1826,7 +1912,7 @@ proc do_create_branch_action {w} {
                focus $w.desc.name_t
                return
        }
-       if {[catch {exec git check-ref-format "heads/$newbranch"}]} {
+       if {[catch {git check-ref-format "heads/$newbranch"}]} {
                tk_messageBox \
                        -icon error \
                        -type ok \
@@ -1843,7 +1929,7 @@ proc do_create_branch_action {w} {
        tracking {set rev $create_branch_trackinghead}
        expression {set rev $create_branch_revexp}
        }
-       if {[catch {set cmt [exec git rev-parse --verify "${rev}^0"]}]} {
+       if {[catch {set cmt [git rev-parse --verify "${rev}^0"]}]} {
                tk_messageBox \
                        -icon error \
                        -type ok \
@@ -2022,7 +2108,7 @@ proc do_delete_branch_action {w} {
        }
        if {$check_rev eq {:none}} {
                set check_cmt {}
-       } elseif {[catch {set check_cmt [exec git rev-parse --verify "${check_rev}^0"]}]} {
+       } elseif {[catch {set check_cmt [git rev-parse --verify "${check_rev}^0"]}]} {
                tk_messageBox \
                        -icon error \
                        -type ok \
@@ -2036,10 +2122,10 @@ proc do_delete_branch_action {w} {
        set not_merged [list]
        foreach i [$w.list.l curselection] {
                set b [$w.list.l get $i]
-               if {[catch {set o [exec git rev-parse --verify $b]}]} continue
+               if {[catch {set o [git rev-parse --verify $b]}]} continue
                if {$check_cmt ne {}} {
                        if {$b eq $check_rev} continue
-                       if {[catch {set m [exec git merge-base $o $check_cmt]}]} continue
+                       if {[catch {set m [git merge-base $o $check_cmt]}]} continue
                        if {$o ne $m} {
                                lappend not_merged $b
                                continue
@@ -2077,7 +2163,7 @@ Delete the selected branches?}
        foreach i $to_delete {
                set b [lindex $i 0]
                set o [lindex $i 1]
-               if {[catch {exec git update-ref -d "refs/heads/$b" $o} err]} {
+               if {[catch {git update-ref -d "refs/heads/$b" $o} err]} {
                        append failed " - $b: $err\n"
                } else {
                        set x [lsearch -sorted -exact $all_heads $b]
@@ -2129,16 +2215,19 @@ proc do_delete_branch {} {
                -font font_ui
        listbox $w.list.l \
                -height 10 \
-               -width 50 \
+               -width 70 \
                -selectmode extended \
+               -yscrollcommand [list $w.list.sby set] \
                -font font_ui
        foreach h $all_heads {
                if {$h ne $current_branch} {
                        $w.list.l insert end $h
                }
        }
-       pack $w.list.l -fill both -pady 5 -padx 5
-       pack $w.list -fill both -pady 5 -padx 5
+       scrollbar $w.list.sby -command [list $w.list.l yview]
+       pack $w.list.sby -side right -fill y
+       pack $w.list.l -side left -fill both -expand 1
+       pack $w.list -fill both -expand 1 -pady 5 -padx 5
 
        labelframe $w.validate \
                -text {Delete Only If} \
@@ -2285,7 +2374,7 @@ Staying on branch '$current_branch'."
        #    here, it Just Works(tm).  If it doesn't we are in some really ugly
        #    state that is difficult to recover from within git-gui.
        #
-       if {[catch {exec git symbolic-ref HEAD "refs/heads/$new_branch"} err]} {
+       if {[catch {git symbolic-ref HEAD "refs/heads/$new_branch"} err]} {
                error_popup "Failed to set current branch.
 
 This working directory is only partially switched.
@@ -2510,8 +2599,9 @@ proc do_push_anywhere {} {
                -font font_ui
        listbox $w.source.l \
                -height 10 \
-               -width 50 \
+               -width 70 \
                -selectmode extended \
+               -yscrollcommand [list $w.source.sby set] \
                -font font_ui
        foreach h $all_heads {
                $w.source.l insert end $h
@@ -2519,8 +2609,10 @@ proc do_push_anywhere {} {
                        $w.source.l select set end
                }
        }
-       pack $w.source.l -fill both -pady 5 -padx 5
-       pack $w.source -fill both -pady 5 -padx 5
+       scrollbar $w.source.sby -command [list $w.source.l yview]
+       pack $w.source.sby -side right -fill y
+       pack $w.source.l -side left -fill both -expand 1
+       pack $w.source -fill both -expand 1 -pady 5 -padx 5
 
        labelframe $w.dest \
                -text {Destination Repository} \
@@ -2782,7 +2874,7 @@ proc do_local_merge {} {
                -font font_ui
        listbox $w.source.l \
                -height 10 \
-               -width 25 \
+               -width 70 \
                -selectmode extended \
                -yscrollcommand [list $w.source.sby set] \
                -font font_ui
@@ -2878,6 +2970,649 @@ proc reset_hard_wait {fd} {
        }
 }
 
+######################################################################
+##
+## browser
+
+set next_browser_id 0
+
+proc new_browser {commit} {
+       global next_browser_id cursor_ptr M1B
+       global browser_commit browser_status browser_stack browser_path browser_busy
+
+       set w .browser[incr next_browser_id]
+       set w_list $w.list.l
+       set browser_commit($w_list) $commit
+       set browser_status($w_list) {Starting...}
+       set browser_stack($w_list) {}
+       set browser_path($w_list) $browser_commit($w_list):
+       set browser_busy($w_list) 1
+
+       toplevel $w
+       label $w.path -textvariable browser_path($w_list) \
+               -anchor w \
+               -justify left \
+               -borderwidth 1 \
+               -relief sunken \
+               -font font_uibold
+       pack $w.path -anchor w -side top -fill x
+
+       frame $w.list
+       text $w_list -background white -borderwidth 0 \
+               -cursor $cursor_ptr \
+               -state disabled \
+               -wrap none \
+               -height 20 \
+               -width 70 \
+               -xscrollcommand [list $w.list.sbx set] \
+               -yscrollcommand [list $w.list.sby set] \
+               -font font_ui
+       $w_list tag conf in_sel \
+               -background [$w_list cget -foreground] \
+               -foreground [$w_list cget -background]
+       scrollbar $w.list.sbx -orient h -command [list $w_list xview]
+       scrollbar $w.list.sby -orient v -command [list $w_list yview]
+       pack $w.list.sbx -side bottom -fill x
+       pack $w.list.sby -side right -fill y
+       pack $w_list -side left -fill both -expand 1
+       pack $w.list -side top -fill both -expand 1
+
+       label $w.status -textvariable browser_status($w_list) \
+               -anchor w \
+               -justify left \
+               -borderwidth 1 \
+               -relief sunken \
+               -font font_ui
+       pack $w.status -anchor w -side bottom -fill x
+
+       bind $w_list <Button-1>        "browser_click 0 $w_list @%x,%y;break"
+       bind $w_list <Double-Button-1> "browser_click 1 $w_list @%x,%y;break"
+       bind $w_list <$M1B-Up>         "browser_parent $w_list;break"
+       bind $w_list <$M1B-Left>       "browser_parent $w_list;break"
+       bind $w_list <Up>              "browser_move -1 $w_list;break"
+       bind $w_list <Down>            "browser_move 1 $w_list;break"
+       bind $w_list <$M1B-Right>      "browser_enter $w_list;break"
+       bind $w_list <Return>          "browser_enter $w_list;break"
+       bind $w_list <Prior>           "browser_page -1 $w_list;break"
+       bind $w_list <Next>            "browser_page 1 $w_list;break"
+       bind $w_list <Left>            break
+       bind $w_list <Right>           break
+
+       bind $w <Visibility> "focus $w"
+       bind $w <Destroy> "
+               array unset browser_buffer $w_list
+               array unset browser_files $w_list
+               array unset browser_status $w_list
+               array unset browser_stack $w_list
+               array unset browser_path $w_list
+               array unset browser_commit $w_list
+               array unset browser_busy $w_list
+       "
+       wm title $w "[appname] ([reponame]): File Browser"
+       ls_tree $w_list $browser_commit($w_list) {}
+}
+
+proc browser_move {dir w} {
+       global browser_files browser_busy
+
+       if {$browser_busy($w)} return
+       set lno [lindex [split [$w index in_sel.first] .] 0]
+       incr lno $dir
+       if {[lindex $browser_files($w) [expr {$lno - 1}]] ne {}} {
+               $w tag remove in_sel 0.0 end
+               $w tag add in_sel $lno.0 [expr {$lno + 1}].0
+               $w see $lno.0
+       }
+}
+
+proc browser_page {dir w} {
+       global browser_files browser_busy
+
+       if {$browser_busy($w)} return
+       $w yview scroll $dir pages
+       set lno [expr {int(
+                 [lindex [$w yview] 0]
+               * [llength $browser_files($w)]
+               + 1)}]
+       if {[lindex $browser_files($w) [expr {$lno - 1}]] ne {}} {
+               $w tag remove in_sel 0.0 end
+               $w tag add in_sel $lno.0 [expr {$lno + 1}].0
+               $w see $lno.0
+       }
+}
+
+proc browser_parent {w} {
+       global browser_files browser_status browser_path
+       global browser_stack browser_busy
+
+       if {$browser_busy($w)} return
+       set info [lindex $browser_files($w) 0]
+       if {[lindex $info 0] eq {parent}} {
+               set parent [lindex $browser_stack($w) end-1]
+               set browser_stack($w) [lrange $browser_stack($w) 0 end-2]
+               if {$browser_stack($w) eq {}} {
+                       regsub {:.*$} $browser_path($w) {:} browser_path($w)
+               } else {
+                       regsub {/[^/]+$} $browser_path($w) {} browser_path($w)
+               }
+               set browser_status($w) "Loading $browser_path($w)..."
+               ls_tree $w [lindex $parent 0] [lindex $parent 1]
+       }
+}
+
+proc browser_enter {w} {
+       global browser_files browser_status browser_path
+       global browser_commit browser_stack browser_busy
+
+       if {$browser_busy($w)} return
+       set lno [lindex [split [$w index in_sel.first] .] 0]
+       set info [lindex $browser_files($w) [expr {$lno - 1}]]
+       if {$info ne {}} {
+               switch -- [lindex $info 0] {
+               parent {
+                       browser_parent $w
+               }
+               tree {
+                       set name [lindex $info 2]
+                       set escn [escape_path $name]
+                       set browser_status($w) "Loading $escn..."
+                       append browser_path($w) $escn
+                       ls_tree $w [lindex $info 1] $name
+               }
+               blob {
+                       set name [lindex $info 2]
+                       set p {}
+                       foreach n $browser_stack($w) {
+                               append p [lindex $n 1]
+                       }
+                       append p $name
+                       show_blame $browser_commit($w) $p
+               }
+               }
+       }
+}
+
+proc browser_click {was_double_click w pos} {
+       global browser_files browser_busy
+
+       if {$browser_busy($w)} return
+       set lno [lindex [split [$w index $pos] .] 0]
+       focus $w
+
+       if {[lindex $browser_files($w) [expr {$lno - 1}]] ne {}} {
+               $w tag remove in_sel 0.0 end
+               $w tag add in_sel $lno.0 [expr {$lno + 1}].0
+               if {$was_double_click} {
+                       browser_enter $w
+               }
+       }
+}
+
+proc ls_tree {w tree_id name} {
+       global browser_buffer browser_files browser_stack browser_busy
+
+       set browser_buffer($w) {}
+       set browser_files($w) {}
+       set browser_busy($w) 1
+
+       $w conf -state normal
+       $w tag remove in_sel 0.0 end
+       $w delete 0.0 end
+       if {$browser_stack($w) ne {}} {
+               $w image create end \
+                       -align center -padx 5 -pady 1 \
+                       -name icon0 \
+                       -image file_uplevel
+               $w insert end {[Up To Parent]}
+               lappend browser_files($w) parent
+       }
+       lappend browser_stack($w) [list $tree_id $name]
+       $w conf -state disabled
+
+       set cmd [list git ls-tree -z $tree_id]
+       set fd [open "| $cmd" r]
+       fconfigure $fd -blocking 0 -translation binary -encoding binary
+       fileevent $fd readable [list read_ls_tree $fd $w]
+}
+
+proc read_ls_tree {fd w} {
+       global browser_buffer browser_files browser_status browser_busy
+
+       if {![winfo exists $w]} {
+               catch {close $fd}
+               return
+       }
+
+       append browser_buffer($w) [read $fd]
+       set pck [split $browser_buffer($w) "\0"]
+       set browser_buffer($w) [lindex $pck end]
+
+       set n [llength $browser_files($w)]
+       $w conf -state normal
+       foreach p [lrange $pck 0 end-1] {
+               set info [split $p "\t"]
+               set path [lindex $info 1]
+               set info [split [lindex $info 0] { }]
+               set type [lindex $info 1]
+               set object [lindex $info 2]
+
+               switch -- $type {
+               blob {
+                       set image file_mod
+               }
+               tree {
+                       set image file_dir
+                       append path /
+               }
+               default {
+                       set image file_question
+               }
+               }
+
+               if {$n > 0} {$w insert end "\n"}
+               $w image create end \
+                       -align center -padx 5 -pady 1 \
+                       -name icon[incr n] \
+                       -image $image
+               $w insert end [escape_path $path]
+               lappend browser_files($w) [list $type $object $path]
+       }
+       $w conf -state disabled
+
+       if {[eof $fd]} {
+               close $fd
+               set browser_status($w) Ready.
+               set browser_busy($w) 0
+               array unset browser_buffer $w
+               if {$n > 0} {
+                       $w tag add in_sel 1.0 2.0
+                       focus -force $w
+               }
+       }
+}
+
+proc show_blame {commit path} {
+       global next_browser_id blame_status blame_data
+
+       if {[winfo ismapped .]} {
+               set w .browser[incr next_browser_id]
+               set tl $w
+               toplevel $w
+       } else {
+               set w {}
+               set tl .
+       }
+       set blame_status($w) {Loading current file content...}
+
+       label $w.path -text "$commit:$path" \
+               -anchor w \
+               -justify left \
+               -borderwidth 1 \
+               -relief sunken \
+               -font font_uibold
+       pack $w.path -side top -fill x
+
+       frame $w.out
+       text $w.out.loaded_t \
+               -background white -borderwidth 0 \
+               -state disabled \
+               -wrap none \
+               -height 40 \
+               -width 1 \
+               -font font_diff
+       $w.out.loaded_t tag conf annotated -background grey
+
+       text $w.out.linenumber_t \
+               -background white -borderwidth 0 \
+               -state disabled \
+               -wrap none \
+               -height 40 \
+               -width 5 \
+               -font font_diff
+       $w.out.linenumber_t tag conf linenumber -justify right
+
+       text $w.out.file_t \
+               -background white -borderwidth 0 \
+               -state disabled \
+               -wrap none \
+               -height 40 \
+               -width 80 \
+               -xscrollcommand [list $w.out.sbx set] \
+               -font font_diff
+
+       scrollbar $w.out.sbx -orient h -command [list $w.out.file_t xview]
+       scrollbar $w.out.sby -orient v \
+               -command [list scrollbar2many [list \
+               $w.out.loaded_t \
+               $w.out.linenumber_t \
+               $w.out.file_t \
+               ] yview]
+       grid \
+               $w.out.linenumber_t \
+               $w.out.loaded_t \
+               $w.out.file_t \
+               $w.out.sby \
+               -sticky nsew
+       grid conf $w.out.sbx -column 2 -sticky we
+       grid columnconfigure $w.out 2 -weight 1
+       grid rowconfigure $w.out 0 -weight 1
+       pack $w.out -fill both -expand 1
+
+       label $w.status -textvariable blame_status($w) \
+               -anchor w \
+               -justify left \
+               -borderwidth 1 \
+               -relief sunken \
+               -font font_ui
+       pack $w.status -side bottom -fill x
+
+       frame $w.cm
+       text $w.cm.t \
+               -background white -borderwidth 0 \
+               -state disabled \
+               -wrap none \
+               -height 10 \
+               -width 80 \
+               -xscrollcommand [list $w.cm.sbx set] \
+               -yscrollcommand [list $w.cm.sby set] \
+               -font font_diff
+       scrollbar $w.cm.sbx -orient h -command [list $w.cm.t xview]
+       scrollbar $w.cm.sby -orient v -command [list $w.cm.t yview]
+       pack $w.cm.sby -side right -fill y
+       pack $w.cm.sbx -side bottom -fill x
+       pack $w.cm.t -expand 1 -fill both
+       pack $w.cm -side bottom -fill x
+
+       menu $w.ctxm -tearoff 0
+       $w.ctxm add command -label "Copy Commit" \
+               -font font_ui \
+               -command "blame_copycommit $w \$cursorW @\$cursorX,\$cursorY"
+
+       foreach i [list \
+               $w.out.loaded_t \
+               $w.out.linenumber_t \
+               $w.out.file_t] {
+               $i tag conf in_sel \
+                       -background [$i cget -foreground] \
+                       -foreground [$i cget -background]
+               $i conf -yscrollcommand \
+                       [list many2scrollbar [list \
+                       $w.out.loaded_t \
+                       $w.out.linenumber_t \
+                       $w.out.file_t \
+                       ] yview $w.out.sby]
+               bind $i <Button-1> "
+                       blame_click {$w} \\
+                               $w.cm.t \\
+                               $w.out.linenumber_t \\
+                               $w.out.file_t \\
+                               $i @%x,%y
+                       focus $i
+               "
+               bind_button3 $i "
+                       set cursorX %x
+                       set cursorY %y
+                       set cursorW %W
+                       tk_popup $w.ctxm %X %Y
+               "
+       }
+
+       bind $w.cm.t <Button-1> "focus $w.cm.t"
+       bind $tl <Visibility> "focus $tl"
+       bind $tl <Destroy> "
+               array unset blame_status {$w}
+               array unset blame_data $w,*
+       "
+       wm title $tl "[appname] ([reponame]): File Viewer"
+
+       set blame_data($w,commit_count) 0
+       set blame_data($w,commit_list) {}
+       set blame_data($w,total_lines) 0
+       set blame_data($w,blame_lines) 0
+       set blame_data($w,highlight_commit) {}
+       set blame_data($w,highlight_line) -1
+
+       set cmd [list git cat-file blob "$commit:$path"]
+       set fd [open "| $cmd" r]
+       fconfigure $fd -blocking 0 -translation lf -encoding binary
+       fileevent $fd readable [list read_blame_catfile \
+               $fd $w $commit $path \
+               $w.cm.t $w.out.loaded_t $w.out.linenumber_t $w.out.file_t]
+}
+
+proc read_blame_catfile {fd w commit path w_cmit w_load w_line w_file} {
+       global blame_status blame_data
+
+       if {![winfo exists $w_file]} {
+               catch {close $fd}
+               return
+       }
+
+       set n $blame_data($w,total_lines)
+       $w_load conf -state normal
+       $w_line conf -state normal
+       $w_file conf -state normal
+       while {[gets $fd line] >= 0} {
+               regsub "\r\$" $line {} line
+               incr n
+               $w_load insert end "\n"
+               $w_line insert end "$n\n" linenumber
+               $w_file insert end "$line\n"
+       }
+       $w_load conf -state disabled
+       $w_line conf -state disabled
+       $w_file conf -state disabled
+       set blame_data($w,total_lines) $n
+
+       if {[eof $fd]} {
+               close $fd
+               blame_incremental_status $w
+               set cmd [list git blame -M -C --incremental]
+               lappend cmd $commit -- $path
+               set fd [open "| $cmd" r]
+               fconfigure $fd -blocking 0 -translation lf -encoding binary
+               fileevent $fd readable [list read_blame_incremental $fd $w \
+                       $w_load $w_cmit $w_line $w_file]
+       }
+}
+
+proc read_blame_incremental {fd w w_load w_cmit w_line w_file} {
+       global blame_status blame_data
+
+       if {![winfo exists $w_file]} {
+               catch {close $fd}
+               return
+       }
+
+       while {[gets $fd line] >= 0} {
+               if {[regexp {^([a-z0-9]{40}) (\d+) (\d+) (\d+)$} $line line \
+                       cmit original_line final_line line_count]} {
+                       set blame_data($w,commit) $cmit
+                       set blame_data($w,original_line) $original_line
+                       set blame_data($w,final_line) $final_line
+                       set blame_data($w,line_count) $line_count
+
+                       if {[catch {set g $blame_data($w,$cmit,order)}]} {
+                               $w_line tag conf g$cmit
+                               $w_file tag conf g$cmit
+                               $w_line tag raise in_sel
+                               $w_file tag raise in_sel
+                               $w_file tag raise sel
+                               set blame_data($w,$cmit,order) $blame_data($w,commit_count)
+                               incr blame_data($w,commit_count)
+                               lappend blame_data($w,commit_list) $cmit
+                       }
+               } elseif {[string match {filename *} $line]} {
+                       set file [string range $line 9 end]
+                       set n $blame_data($w,line_count)
+                       set lno $blame_data($w,final_line)
+                       set cmit $blame_data($w,commit)
+
+                       while {$n > 0} {
+                               if {[catch {set g g$blame_data($w,line$lno,commit)}]} {
+                                       $w_load tag add annotated $lno.0 "$lno.0 lineend + 1c"
+                               } else {
+                                       $w_line tag remove g$g $lno.0 "$lno.0 lineend + 1c"
+                                       $w_file tag remove g$g $lno.0 "$lno.0 lineend + 1c"
+                               }
+
+                               set blame_data($w,line$lno,commit) $cmit
+                               set blame_data($w,line$lno,file) $file
+                               $w_line tag add g$cmit $lno.0 "$lno.0 lineend + 1c"
+                               $w_file tag add g$cmit $lno.0 "$lno.0 lineend + 1c"
+
+                               if {$blame_data($w,highlight_line) == -1} {
+                                       if {[lindex [$w_file yview] 0] == 0} {
+                                               $w_file see $lno.0
+                                               blame_showcommit $w $w_cmit $w_line $w_file $lno
+                                       }
+                               } elseif {$blame_data($w,highlight_line) == $lno} {
+                                       blame_showcommit $w $w_cmit $w_line $w_file $lno
+                               }
+
+                               incr n -1
+                               incr lno
+                               incr blame_data($w,blame_lines)
+                       }
+
+                       set hc $blame_data($w,highlight_commit)
+                       if {$hc ne {}
+                               && [expr {$blame_data($w,$hc,order) + 1}]
+                                       == $blame_data($w,$cmit,order)} {
+                               blame_showcommit $w $w_cmit $w_line $w_file \
+                                       $blame_data($w,highlight_line)
+                       }
+               } elseif {[regexp {^([a-z-]+) (.*)$} $line line header data]} {
+                       set blame_data($w,$blame_data($w,commit),$header) $data
+               }
+       }
+
+       if {[eof $fd]} {
+               close $fd
+               set blame_status($w) {Annotation complete.}
+       } else {
+               blame_incremental_status $w
+       }
+}
+
+proc blame_incremental_status {w} {
+       global blame_status blame_data
+
+       set blame_status($w) [format \
+               "Loading annotations... %i of %i lines annotated (%2i%%)" \
+               $blame_data($w,blame_lines) \
+               $blame_data($w,total_lines) \
+               [expr {100 * $blame_data($w,blame_lines)
+                       / $blame_data($w,total_lines)}]]
+}
+
+proc blame_click {w w_cmit w_line w_file cur_w pos} {
+       set lno [lindex [split [$cur_w index $pos] .] 0]
+       if {$lno eq {}} return
+
+       $w_line tag remove in_sel 0.0 end
+       $w_file tag remove in_sel 0.0 end
+       $w_line tag add in_sel $lno.0 "$lno.0 + 1 line"
+       $w_file tag add in_sel $lno.0 "$lno.0 + 1 line"
+
+       blame_showcommit $w $w_cmit $w_line $w_file $lno
+}
+
+set blame_colors {
+       #ff4040
+       #ff40ff
+       #4040ff
+}
+
+proc blame_showcommit {w w_cmit w_line w_file lno} {
+       global blame_colors blame_data repo_config
+
+       set cmit $blame_data($w,highlight_commit)
+       if {$cmit ne {}} {
+               set idx $blame_data($w,$cmit,order)
+               set i 0
+               foreach c $blame_colors {
+                       set h [lindex $blame_data($w,commit_list) [expr {$idx - 1 + $i}]]
+                       $w_line tag conf g$h -background white
+                       $w_file tag conf g$h -background white
+                       incr i
+               }
+       }
+
+       $w_cmit conf -state normal
+       $w_cmit delete 0.0 end
+       if {[catch {set cmit $blame_data($w,line$lno,commit)}]} {
+               set cmit {}
+               $w_cmit insert end "Loading annotation..."
+       } else {
+               set idx $blame_data($w,$cmit,order)
+               set i 0
+               foreach c $blame_colors {
+                       set h [lindex $blame_data($w,commit_list) [expr {$idx - 1 + $i}]]
+                       $w_line tag conf g$h -background $c
+                       $w_file tag conf g$h -background $c
+                       incr i
+               }
+
+               if {[catch {set msg $blame_data($w,$cmit,message)}]} {
+                       set msg {}
+                       catch {
+                               set fd [open "| git cat-file commit $cmit" r]
+                               fconfigure $fd -encoding binary -translation lf
+                               if {[catch {set enc $repo_config(i18n.commitencoding)}]} {
+                                       set enc utf-8
+                               }
+                               while {[gets $fd line] > 0} {
+                                       if {[string match {encoding *} $line]} {
+                                               set enc [string tolower [string range $line 9 end]]
+                                       }
+                               }
+                               fconfigure $fd -encoding $enc
+                               set msg [string trim [read $fd]]
+                               close $fd
+                       }
+                       set blame_data($w,$cmit,message) $msg
+               }
+
+               set author_name {}
+               set author_email {}
+               set author_time {}
+               catch {set author_name $blame_data($w,$cmit,author)}
+               catch {set author_email $blame_data($w,$cmit,author-mail)}
+               catch {set author_time [clock format $blame_data($w,$cmit,author-time)]}
+
+               set committer_name {}
+               set committer_email {}
+               set committer_time {}
+               catch {set committer_name $blame_data($w,$cmit,committer)}
+               catch {set committer_email $blame_data($w,$cmit,committer-mail)}
+               catch {set committer_time [clock format $blame_data($w,$cmit,committer-time)]}
+
+               $w_cmit insert end "commit $cmit\n"
+               $w_cmit insert end "Author: $author_name $author_email $author_time\n"
+               $w_cmit insert end "Committer: $committer_name $committer_email $committer_time\n"
+               $w_cmit insert end "Original File: [escape_path $blame_data($w,line$lno,file)]\n"
+               $w_cmit insert end "\n"
+               $w_cmit insert end $msg
+       }
+       $w_cmit conf -state disabled
+
+       set blame_data($w,highlight_line) $lno
+       set blame_data($w,highlight_commit) $cmit
+}
+
+proc blame_copycommit {w i pos} {
+       global blame_data
+       set lno [lindex [split [$i index $pos] .] 0]
+       if {![catch {set commit $blame_data($w,line$lno,commit)}]} {
+               clipboard clear
+               clipboard append \
+                       -format STRING \
+                       -type STRING \
+                       -- $commit
+       }
+}
+
 ######################################################################
 ##
 ## icons
@@ -2954,6 +3689,32 @@ static unsigned char file_merge_bits[] = {
    0xfa, 0x17, 0x02, 0x10, 0xfe, 0x1f};
 } -maskdata $filemask
 
+set file_dir_data {
+#define file_width 18
+#define file_height 18
+static unsigned char file_bits[] = {
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8, 0x03, 0x00,
+  0x0c, 0x03, 0x00, 0x04, 0xfe, 0x00, 0x06, 0x80, 0x00, 0xff, 0x9f, 0x00,
+  0x03, 0x98, 0x00, 0x02, 0x90, 0x00, 0x06, 0xb0, 0x00, 0x04, 0xa0, 0x00,
+  0x0c, 0xe0, 0x00, 0x08, 0xc0, 0x00, 0xf8, 0xff, 0x00, 0x00, 0x00, 0x00,
+  0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+}
+image create bitmap file_dir -background white -foreground blue \
+       -data $file_dir_data -maskdata $file_dir_data
+unset file_dir_data
+
+set file_uplevel_data {
+#define up_width 15
+#define up_height 15
+static unsigned char up_bits[] = {
+  0x80, 0x00, 0xc0, 0x01, 0xe0, 0x03, 0xf0, 0x07, 0xf8, 0x0f, 0xfc, 0x1f,
+  0xfe, 0x3f, 0xc0, 0x01, 0xc0, 0x01, 0xc0, 0x01, 0xc0, 0x01, 0xc0, 0x01,
+  0xc0, 0x01, 0xc0, 0x01, 0x00, 0x00};
+}
+image create bitmap file_uplevel -background white -foreground red \
+       -data $file_uplevel_data -maskdata $file_uplevel_data
+unset file_uplevel_data
+
 set ui_index .vpane.files.index.list
 set ui_workdir .vpane.files.workdir.list
 
@@ -3003,22 +3764,6 @@ unset i
 ##
 ## util
 
-proc is_MacOSX {} {
-       global tcl_platform tk_library
-       if {[tk windowingsystem] eq {aqua}} {
-               return 1
-       }
-       return 0
-}
-
-proc is_Windows {} {
-       global tcl_platform
-       if {$tcl_platform(platform) eq {windows}} {
-               return 1
-       }
-       return 0
-}
-
 proc bind_button3 {w cmd} {
        bind $w <Any-Button-3> $cmd
        if {[is_MacOSX]} {
@@ -3026,6 +3771,15 @@ proc bind_button3 {w cmd} {
        }
 }
 
+proc scrollbar2many {list mode args} {
+       foreach w $list {eval $w $mode $args}
+}
+
+proc many2scrollbar {list mode sb top bottom} {
+       $sb set $top $bottom
+       foreach w $list {$w $mode moveto $top}
+}
+
 proc incr_font_size {font {amt 1}} {
        set sz [font configure $font -size]
        incr sz $amt
@@ -3142,10 +3896,10 @@ proc console_init {w} {
 }
 
 proc console_exec {w cmd after} {
-       # -- Windows tosses the enviroment when we exec our child.
+       # -- Cygwin's Tcl tosses the enviroment when we exec our child.
        #    But most users need that so we have to relogin. :-(
        #
-       if {[is_Windows]} {
+       if {[is_Cygwin]} {
                set cmd [list sh --login -c "cd \"[pwd]\" && [join $cmd { }]"]
        }
 
@@ -3267,19 +4021,19 @@ proc console_done {args} {
 set starting_gitk_msg {Starting gitk... please wait...}
 
 proc do_gitk {revs} {
-       global ui_status_value starting_gitk_msg
+       global env ui_status_value starting_gitk_msg
 
-       set cmd gitk
+       # -- Always start gitk through whatever we were loaded with.  This
+       #    lets us bypass using shell process on Windows systems.
+       #
+       set cmd [info nameofexecutable]
+       lappend cmd [gitexec gitk]
        if {$revs ne {}} {
                append cmd { }
                append cmd $revs
        }
-       if {[is_Windows]} {
-               set cmd "sh -c \"exec $cmd\""
-       }
-       append cmd { &}
 
-       if {[catch {eval exec $cmd} err]} {
+       if {[catch {eval exec $cmd &} err]} {
                error_popup "Failed to start gitk:\n\n$err"
        } else {
                set ui_status_value $starting_gitk_msg
@@ -3387,34 +4141,36 @@ proc do_quit {} {
        if {$is_quitting} return
        set is_quitting 1
 
-       # -- Stash our current commit buffer.
-       #
-       set save [gitdir GITGUI_MSG]
-       set msg [string trim [$ui_comm get 0.0 end]]
-       regsub -all -line {[ \r\t]+$} $msg {} msg
-       if {(![string match amend* $commit_type]
-               || [$ui_comm edit modified])
-               && $msg ne {}} {
-               catch {
-                       set fd [open $save w]
-                       puts -nonewline $fd $msg
-                       close $fd
+       if {[winfo exists $ui_comm]} {
+               # -- Stash our current commit buffer.
+               #
+               set save [gitdir GITGUI_MSG]
+               set msg [string trim [$ui_comm get 0.0 end]]
+               regsub -all -line {[ \r\t]+$} $msg {} msg
+               if {(![string match amend* $commit_type]
+                       || [$ui_comm edit modified])
+                       && $msg ne {}} {
+                       catch {
+                               set fd [open $save w]
+                               puts -nonewline $fd $msg
+                               close $fd
+                       }
+               } else {
+                       catch {file delete $save}
                }
-       } else {
-               catch {file delete $save}
-       }
 
-       # -- Stash our current window geometry into this repository.
-       #
-       set cfg_geometry [list]
-       lappend cfg_geometry [wm geometry .]
-       lappend cfg_geometry [lindex [.vpane sash coord 0] 1]
-       lappend cfg_geometry [lindex [.vpane.files sash coord 0] 0]
-       if {[catch {set rc_geometry $repo_config(gui.geometry)}]} {
-               set rc_geometry {}
-       }
-       if {$cfg_geometry ne $rc_geometry} {
-               catch {exec git repo-config gui.geometry $cfg_geometry}
+               # -- Stash our current window geometry into this repository.
+               #
+               set cfg_geometry [list]
+               lappend cfg_geometry [wm geometry .]
+               lappend cfg_geometry [lindex [.vpane sash coord 0] 1]
+               lappend cfg_geometry [lindex [.vpane.files sash coord 0] 0]
+               if {[catch {set rc_geometry $repo_config(gui.geometry)}]} {
+                       set rc_geometry {}
+               }
+               if {$cfg_geometry ne $rc_geometry} {
+                       catch {git config gui.geometry $cfg_geometry}
+               }
        }
 
        destroy .
@@ -3664,7 +4420,7 @@ $copyright" \
 
        set v {}
        append v "[appname] version $appvers\n"
-       append v "[exec git version]\n"
+       append v "[git version]\n"
        append v "\n"
        if {$tcl_patchLevel eq $tk_patchLevel} {
                append v "Tcl/Tk version $tcl_patchLevel"
@@ -3749,52 +4505,62 @@ proc do_options {} {
        pack $w.repo -side left -fill both -expand 1 -pady 5 -padx 5
        pack $w.global -side right -fill both -expand 1 -pady 5 -padx 5
 
+       set optid 0
        foreach option {
-               {b pullsummary {Show Pull Summary}}
-               {b trustmtime  {Trust File Modification Timestamps}}
-               {i diffcontext {Number of Diff Context Lines}}
-               {t newbranchtemplate {New Branch Name Template}}
+               {t user.name {User Name}}
+               {t user.email {Email Address}}
+
+               {b merge.summary {Summarize Merge Commits}}
+               {i-1..5 merge.verbosity {Merge Verbosity}}
+
+               {b gui.trustmtime  {Trust File Modification Timestamps}}
+               {i-1..99 gui.diffcontext {Number of Diff Context Lines}}
+               {t gui.newbranchtemplate {New Branch Name Template}}
                } {
                set type [lindex $option 0]
                set name [lindex $option 1]
                set text [lindex $option 2]
+               incr optid
                foreach f {repo global} {
-                       switch $type {
+                       switch -glob -- $type {
                        b {
-                               checkbutton $w.$f.$name -text $text \
-                                       -variable ${f}_config_new(gui.$name) \
+                               checkbutton $w.$f.$optid -text $text \
+                                       -variable ${f}_config_new($name) \
                                        -onvalue true \
                                        -offvalue false \
                                        -font font_ui
-                               pack $w.$f.$name -side top -anchor w
+                               pack $w.$f.$optid -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 \
+                       i-* {
+                               regexp -- {-(\d+)\.\.(\d+)$} $type _junk min max
+                               frame $w.$f.$optid
+                               label $w.$f.$optid.l -text "$text:" -font font_ui
+                               pack $w.$f.$optid.l -side left -anchor w -fill x
+                               spinbox $w.$f.$optid.v \
+                                       -textvariable ${f}_config_new($name) \
+                                       -from $min \
+                                       -to $max \
+                                       -increment 1 \
+                                       -width [expr {1 + [string length $max]}] \
                                        -font font_ui
-                               bind $w.$f.$name.v <FocusIn> {%W selection range 0 end}
-                               pack $w.$f.$name.v -side right -anchor e -padx 5
-                               pack $w.$f.$name -side top -anchor w -fill x
+                               bind $w.$f.$optid.v <FocusIn> {%W selection range 0 end}
+                               pack $w.$f.$optid.v -side right -anchor e -padx 5
+                               pack $w.$f.$optid -side top -anchor w -fill x
                        }
                        t {
-                               frame $w.$f.$name
-                               label $w.$f.$name.l -text "$text:" -font font_ui
-                               entry $w.$f.$name.v \
+                               frame $w.$f.$optid
+                               label $w.$f.$optid.l -text "$text:" -font font_ui
+                               entry $w.$f.$optid.v \
                                        -borderwidth 1 \
                                        -relief sunken \
                                        -width 20 \
-                                       -textvariable ${f}_config_new(gui.$name) \
+                                       -textvariable ${f}_config_new($name) \
                                        -font font_ui
-                               pack $w.$f.$name.l -side left -anchor w
-                               pack $w.$f.$name.v -side left -anchor w \
+                               pack $w.$f.$optid.l -side left -anchor w
+                               pack $w.$f.$optid.v -side left -anchor w \
                                        -fill x -expand 1 \
                                        -padx 5
-                               pack $w.$f.$name -side top -anchor w -fill x
+                               pack $w.$f.$optid -side top -anchor w -fill x
                        }
                        }
                }
@@ -3870,6 +4636,29 @@ proc do_save_config {w} {
 proc do_windows_shortcut {} {
        global argv0
 
+       set fn [tk_getSaveFile \
+               -parent . \
+               -title "[appname] ([reponame]): Create Desktop Icon" \
+               -initialfile "Git [reponame].bat"]
+       if {$fn != {}} {
+               if {[catch {
+                               set fd [open $fn w]
+                               puts $fd "@ECHO Entering [reponame]"
+                               puts $fd "@ECHO Starting git-gui... please wait..."
+                               puts $fd "@SET PATH=[file normalize [gitexec]];%PATH%"
+                               puts $fd "@SET GIT_DIR=[file normalize [gitdir]]"
+                               puts -nonewline $fd "@\"[info nameofexecutable]\""
+                               puts $fd " \"[file normalize $argv0]\""
+                               close $fd
+                       } err]} {
+                       error_popup "Cannot write script:\n\n$err"
+               }
+       }
+}
+
+proc do_cygwin_shortcut {} {
+       global argv0
+
        if {[catch {
                set desktop [exec cygpath \
                        --windows \
@@ -3961,7 +4750,7 @@ proc do_macosx_app {} {
 
                                set fd [open $exe w]
                                set gd [file normalize [gitdir]]
-                               set ep [file normalize [exec git --exec-path]]
+                               set ep [file normalize [gitexec]]
                                regsub -all ' $gd "'\\''" gd
                                regsub -all ' $ep "'\\''" ep
                                puts $fd "#!/bin/sh"
@@ -4125,8 +4914,12 @@ proc apply_config {} {
        }
 }
 
+set default_config(merge.summary) false
+set default_config(merge.verbosity) 2
+set default_config(user.name) {}
+set default_config(user.email) {}
+
 set default_config(gui.trustmtime) false
-set default_config(gui.pullsummary) true
 set default_config(gui.diffcontext) 5
 set default_config(gui.newbranchtemplate) {}
 set default_config(gui.fontui) [font configure font_ui]
@@ -4138,20 +4931,60 @@ set font_descs {
 load_config 0
 apply_config
 
+######################################################################
+##
+## feature option selection
+
+if {[regexp {^git-(.+)$} [appname] _junk subcommand]} {
+       unset _junk
+} else {
+       set subcommand gui
+}
+if {$subcommand eq {gui.sh}} {
+       set subcommand gui
+}
+if {$subcommand eq {gui} && [llength $argv] > 0} {
+       set subcommand [lindex $argv 0]
+       set argv [lrange $argv 1 end]
+}
+
+enable_option multicommit
+enable_option branch
+enable_option transport
+
+switch -- $subcommand {
+blame {
+       disable_option multicommit
+       disable_option branch
+       disable_option transport
+}
+citool {
+       enable_option singlecommit
+
+       disable_option multicommit
+       disable_option branch
+       disable_option transport
+}
+}
+
 ######################################################################
 ##
 ## ui construction
 
+set ui_comm {}
+
 # -- Menu Bar
 #
 menu .mbar -tearoff 0
 .mbar add cascade -label Repository -menu .mbar.repository
 .mbar add cascade -label Edit -menu .mbar.edit
-if {!$single_commit} {
+if {[is_enabled branch]} {
        .mbar add cascade -label Branch -menu .mbar.branch
 }
-.mbar add cascade -label Commit -menu .mbar.commit
-if {!$single_commit} {
+if {[is_enabled multicommit] || [is_enabled singlecommit]} {
+       .mbar add cascade -label Commit -menu .mbar.commit
+}
+if {[is_enabled transport]} {
        .mbar add cascade -label Merge -menu .mbar.merge
        .mbar add cascade -label Fetch -menu .mbar.fetch
        .mbar add cascade -label Push -menu .mbar.push
@@ -4161,17 +4994,26 @@ if {!$single_commit} {
 # -- Repository Menu
 #
 menu .mbar.repository
+
+.mbar.repository add command \
+       -label {Browse Current Branch} \
+       -command {new_browser $current_branch} \
+       -font font_ui
+trace add variable current_branch write ".mbar.repository entryconf [.mbar.repository index last] -label \"Browse \$current_branch\" ;#"
+.mbar.repository add separator
+
 .mbar.repository add command \
        -label {Visualize Current Branch} \
-       -command {do_gitk {}} \
+       -command {do_gitk $current_branch} \
        -font font_ui
+trace add variable current_branch write ".mbar.repository entryconf [.mbar.repository index last] -label \"Visualize \$current_branch\" ;#"
 .mbar.repository add command \
        -label {Visualize All Branches} \
-       -command {do_gitk {--all}} \
+       -command {do_gitk --all} \
        -font font_ui
 .mbar.repository add separator
 
-if {!$single_commit} {
+if {[is_enabled multicommit]} {
        .mbar.repository add command -label {Database Statistics} \
                -command do_stats \
                -font font_ui
@@ -4186,7 +5028,12 @@ if {!$single_commit} {
 
        .mbar.repository add separator
 
-       if {[is_Windows]} {
+       if {[is_Cygwin]} {
+               .mbar.repository add command \
+                       -label {Create Desktop Icon} \
+                       -command do_cygwin_shortcut \
+                       -font font_ui
+       } elseif {[is_Windows]} {
                .mbar.repository add command \
                        -label {Create Desktop Icon} \
                        -command do_windows_shortcut \
@@ -4240,7 +5087,7 @@ menu .mbar.edit
 
 # -- Branch Menu
 #
-if {!$single_commit} {
+if {[is_enabled branch]} {
        menu .mbar.branch
 
        .mbar.branch add command -label {Create...} \
@@ -4259,73 +5106,75 @@ if {!$single_commit} {
 
 # -- Commit Menu
 #
-menu .mbar.commit
-
-.mbar.commit add radiobutton \
-       -label {New Commit} \
-       -command do_select_commit_type \
-       -variable selected_commit_type \
-       -value new \
-       -font font_ui
-lappend disable_on_lock \
-       [list .mbar.commit entryconf [.mbar.commit index last] -state]
+if {[is_enabled multicommit] || [is_enabled singlecommit]} {
+       menu .mbar.commit
+
+       .mbar.commit add radiobutton \
+               -label {New Commit} \
+               -command do_select_commit_type \
+               -variable selected_commit_type \
+               -value new \
+               -font font_ui
+       lappend disable_on_lock \
+               [list .mbar.commit entryconf [.mbar.commit index last] -state]
 
-.mbar.commit add radiobutton \
-       -label {Amend Last Commit} \
-       -command do_select_commit_type \
-       -variable selected_commit_type \
-       -value amend \
-       -font font_ui
-lappend disable_on_lock \
-       [list .mbar.commit entryconf [.mbar.commit index last] -state]
+       .mbar.commit add radiobutton \
+               -label {Amend Last Commit} \
+               -command do_select_commit_type \
+               -variable selected_commit_type \
+               -value amend \
+               -font font_ui
+       lappend disable_on_lock \
+               [list .mbar.commit entryconf [.mbar.commit index last] -state]
 
-.mbar.commit add separator
+       .mbar.commit add separator
 
-.mbar.commit add command -label Rescan \
-       -command do_rescan \
-       -accelerator F5 \
-       -font font_ui
-lappend disable_on_lock \
-       [list .mbar.commit entryconf [.mbar.commit index last] -state]
+       .mbar.commit add command -label Rescan \
+               -command do_rescan \
+               -accelerator F5 \
+               -font font_ui
+       lappend disable_on_lock \
+               [list .mbar.commit entryconf [.mbar.commit index last] -state]
 
-.mbar.commit add command -label {Add To Commit} \
-       -command do_add_selection \
-       -font font_ui
-lappend disable_on_lock \
-       [list .mbar.commit entryconf [.mbar.commit index last] -state]
+       .mbar.commit add command -label {Add To Commit} \
+               -command do_add_selection \
+               -font font_ui
+       lappend disable_on_lock \
+               [list .mbar.commit entryconf [.mbar.commit index last] -state]
 
-.mbar.commit add command -label {Add All To Commit} \
-       -command do_add_all \
-       -accelerator $M1T-I \
-       -font font_ui
-lappend disable_on_lock \
-       [list .mbar.commit entryconf [.mbar.commit index last] -state]
+       .mbar.commit add command -label {Add Existing To Commit} \
+               -command do_add_all \
+               -accelerator $M1T-I \
+               -font font_ui
+       lappend disable_on_lock \
+               [list .mbar.commit entryconf [.mbar.commit index last] -state]
 
-.mbar.commit add command -label {Unstage From Commit} \
-       -command do_unstage_selection \
-       -font font_ui
-lappend disable_on_lock \
-       [list .mbar.commit entryconf [.mbar.commit index last] -state]
+       .mbar.commit add command -label {Unstage From Commit} \
+               -command do_unstage_selection \
+               -font font_ui
+       lappend disable_on_lock \
+               [list .mbar.commit entryconf [.mbar.commit index last] -state]
 
-.mbar.commit add command -label {Revert Changes} \
-       -command do_revert_selection \
-       -font font_ui
-lappend disable_on_lock \
-       [list .mbar.commit entryconf [.mbar.commit index last] -state]
+       .mbar.commit add command -label {Revert Changes} \
+               -command do_revert_selection \
+               -font font_ui
+       lappend disable_on_lock \
+               [list .mbar.commit entryconf [.mbar.commit index last] -state]
 
-.mbar.commit add separator
+       .mbar.commit add separator
 
-.mbar.commit add command -label {Sign Off} \
-       -command do_signoff \
-       -accelerator $M1T-S \
-       -font font_ui
+       .mbar.commit add command -label {Sign Off} \
+               -command do_signoff \
+               -accelerator $M1T-S \
+               -font font_ui
 
-.mbar.commit add command -label Commit \
-       -command do_commit \
-       -accelerator $M1T-Return \
-       -font font_ui
-lappend disable_on_lock \
-       [list .mbar.commit entryconf [.mbar.commit index last] -state]
+       .mbar.commit add command -label Commit \
+               -command do_commit \
+               -accelerator $M1T-Return \
+               -font font_ui
+       lappend disable_on_lock \
+               [list .mbar.commit entryconf [.mbar.commit index last] -state]
+}
 
 if {[is_MacOSX]} {
        # -- Apple Menu (Mac OS X only)
@@ -4376,17 +5225,95 @@ if {[is_MacOSX]} {
        lappend disable_on_lock \
                [list .mbar.tools entryconf [.mbar.tools index last] -state]
        }
+}
 
-       # -- Help Menu
-       #
-       .mbar add cascade -label Help -menu .mbar.help
-       menu .mbar.help
+# -- Help Menu
+#
+.mbar add cascade -label Help -menu .mbar.help
+menu .mbar.help
 
+if {![is_MacOSX]} {
        .mbar.help add command -label "About [appname]" \
                -command do_about \
                -font font_ui
 }
 
+set browser {}
+catch {set browser $repo_config(instaweb.browser)}
+set doc_path [file dirname [gitexec]]
+set doc_path [file join $doc_path Documentation index.html]
+
+if {[is_Cygwin]} {
+       set doc_path [exec cygpath --windows $doc_path]
+}
+
+if {$browser eq {}} {
+       if {[is_MacOSX]} {
+               set browser open
+       } elseif {[is_Cygwin]} {
+               set program_files [file dirname [exec cygpath --windir]]
+               set program_files [file join $program_files {Program Files}]
+               set firefox [file join $program_files {Mozilla Firefox} firefox.exe]
+               set ie [file join $program_files {Internet Explorer} IEXPLORE.EXE]
+               if {[file exists $firefox]} {
+                       set browser $firefox
+               } elseif {[file exists $ie]} {
+                       set browser $ie
+               }
+               unset program_files firefox ie
+       }
+}
+
+if {[file isfile $doc_path]} {
+       set doc_url "file:$doc_path"
+} else {
+       set doc_url {http://www.kernel.org/pub/software/scm/git/docs/}
+}
+
+if {$browser ne {}} {
+       .mbar.help add command -label {Online Documentation} \
+               -command [list exec $browser $doc_url &] \
+               -font font_ui
+}
+unset browser doc_path doc_url
+
+# -- Standard bindings
+#
+bind .   <Destroy> do_quit
+bind all <$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]}
+
+# -- Not a normal commit type invocation?  Do that instead!
+#
+switch -- $subcommand {
+blame {
+       if {[llength $argv] != 2} {
+               puts stderr "usage: $argv0 blame commit path"
+               exit 1
+       }
+       set current_branch [lindex $argv 0]
+       show_blame $current_branch [lindex $argv 1]
+       return
+}
+citool -
+gui {
+       if {[llength $argv] != 0} {
+               puts -nonewline stderr "usage: $argv0"
+               if {$subcommand ne {gui} && [appname] ne "git-$subcommand"} {
+                       puts -nonewline stderr " $subcommand"
+               }
+               puts stderr {}
+               exit 1
+       }
+       # fall through to setup UI for commits
+}
+default {
+       puts stderr "usage: $argv0 \[{blame|citool}\]"
+       exit 1
+}
+}
 
 # -- Branch Control
 #
@@ -4407,7 +5334,7 @@ pack .branch.l1 -side left
 pack .branch.cb -side left -fill x
 pack .branch -side top -fill x
 
-if {!$single_commit} {
+if {[is_enabled branch]} {
        menu .mbar.merge
        .mbar.merge add command -label {Local Merge...} \
                -command do_local_merge \
@@ -4514,7 +5441,7 @@ pack .vpane.lower.commarea.buttons.rescan -side top -fill x
 lappend disable_on_lock \
        {.vpane.lower.commarea.buttons.rescan conf -state}
 
-button .vpane.lower.commarea.buttons.incall -text {Add All} \
+button .vpane.lower.commarea.buttons.incall -text {Add Existing} \
        -command do_add_all \
        -font font_ui
 pack .vpane.lower.commarea.buttons.incall -side top -fill x
@@ -4879,12 +5806,11 @@ bind $ui_diff <Key-Left>   {catch {%W xview scroll -1 units};break}
 bind $ui_diff <Key-Right>  {catch {%W xview scroll  1 units};break}
 bind $ui_diff <Button-1>   {focus %W}
 
-if {!$single_commit} {
+if {[is_enabled branch]} {
        bind . <$M1B-Key-n> do_create_branch
        bind . <$M1B-Key-N> do_create_branch
 }
 
-bind .   <Destroy> do_quit
 bind all <Key-F5> do_rescan
 bind all <$M1B-Key-r> do_rescan
 bind all <$M1B-Key-R> do_rescan
@@ -4893,10 +5819,6 @@ bind .   <$M1B-Key-S> do_signoff
 bind .   <$M1B-Key-i> do_add_all
 bind .   <$M1B-Key-I> do_add_all
 bind .   <$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_workdir] {
        bind $i <Button-1>       "toggle_or_diff         $i %x %y; break"
        bind $i <$M1B-Button-1>  "add_one_to_selection   $i %x %y; break"
@@ -4923,7 +5845,7 @@ focus -force $ui_comm
 #    does *not* pass its env array onto any processes it spawns.
 #    This means that git processes get none of our environment.
 #
-if {[is_Windows]} {
+if {[is_Cygwin]} {
        set ignored_env 0
        set suggest_user {}
        set msg "Possible environment issues exist.
@@ -4976,7 +5898,7 @@ user.email settings into your personal
 
 # -- Only initialize complex UI if we are going to stay running.
 #
-if {!$single_commit} {
+if {[is_enabled transport]} {
        load_all_remotes
        load_all_heads
 
@@ -4987,10 +5909,10 @@ if {!$single_commit} {
 
 # -- Only suggest a gc run if we are going to stay running.
 #
-if {!$single_commit} {
+if {[is_enabled multicommit]} {
        set object_limit 2000
        if {[is_Windows]} {set object_limit 200}
-       regexp {^([0-9]+) objects,} [exec git count-objects] _junk objects_current
+       regexp {^([0-9]+) objects,} [git count-objects] _junk objects_current
        if {$objects_current >= $object_limit} {
                if {[ask_popup \
                        "This repository currently has $objects_current loose objects.