Merge branch 'maint' of git://repo.or.cz/git-gui into maint

* 'maint' of git://repo.or.cz/git-gui:
  git-gui: Don't require a .pvcsrc to create Tools/Migrate menu hack
  git-gui: Don't nice git blame on MSYS as nice is not supported
  git-gui: Don't require $DISPLAY just to get --version
  git-gui: Bind Tab/Shift-Tab to cycle between panes in blame
  git-gui: Correctly install to /usr/bin on Cygwin

git-gui/Makefile

@@ -7,6 +7,8 @@ GIT-VERSION-FILE: .FORCE-GIT-VERSION-FILE
 	@$(SHELL_PATH) ./GIT-VERSION-GEN
 -include GIT-VERSION-FILE
 
+uname_O := $(shell sh -c 'uname -o 2>/dev/null || echo not')
+
 SCRIPT_SH = git-gui.sh
 GITGUI_BUILT_INS = git-citool
 ALL_PROGRAMS = $(GITGUI_BUILT_INS) $(patsubst %.sh,%,$(SCRIPT_SH))
@@ -58,11 +60,15 @@ exedir_SQ = $(subst ','\'',$(exedir))
 
 $(patsubst %.sh,%,$(SCRIPT_SH)) : % : %.sh
 	$(QUIET_GEN)rm -f $@ $@+ && \
+	GITGUI_RELATIVE= && \
 	if test '$(exedir_SQ)' = '$(libdir_SQ)'; then \
-		GITGUI_RELATIVE=1; \
+		if test "$(uname_O)" = Cygwin; \
+		then GITGUI_RELATIVE= ; \
+		else GITGUI_RELATIVE=1; \
+		fi; \
 	fi && \
 	sed -e '1s|#!.*/sh|#!$(SHELL_PATH_SQ)|' \
-		-e 's|^exec wish "$$0"|exec $(subst |,'\|',$(TCLTK_PATH_SQ)) "$$0"|' \
+		-e 's|^ exec wish "$$0"| exec $(subst |,'\|',$(TCLTK_PATH_SQ)) "$$0"|' \
 		-e 's/@@GITGUI_VERSION@@/$(GITGUI_VERSION)/g' \
 		-e 's|@@GITGUI_RELATIVE@@|'$$GITGUI_RELATIVE'|' \
 		-e $$GITGUI_RELATIVE's|@@GITGUI_LIBDIR@@|$(libdir_SQ)|' \

git-gui/git-gui.sh

 #!/bin/sh
 # Tcl ignores the next line -*- tcl -*- \
-exec wish "$0" -- "$@"
+ if test "z$*" = zversion \
+ || test "z$*" = z--version; \
+ then \
+	echo 'git-gui version @@GITGUI_VERSION@@'; \
+	exit; \
+ fi; \
+ exec wish "$0" -- "$@"
 
 set appvers {@@GITGUI_VERSION@@}
 set copyright {
@@ -271,11 +277,6 @@ proc tk_optionMenu {w varName args} {
 ##
 ## version check
 
-if {{--version} eq $argv || {version} eq $argv} {
-	puts "git-gui version $appvers"
-	exit
-}
-
 set req_maj 1
 set req_min 5
 
@@ -1544,8 +1545,7 @@ if {[is_MacOSX]} {
 
 	# -- Tools Menu
 	#
-	if {[file exists /usr/local/miga/lib/gui-miga]
-		&& [file exists .pvcsrc]} {
+	if {[is_Cygwin] && [file exists /usr/local/miga/lib/gui-miga]} {
 	proc do_miga {} {
 		global ui_status_value
 		if {![lock_index update]} return

git-gui/lib/blame.tcl

@@ -272,6 +272,8 @@ constructor new {i_commit i_path} {
 			set cursorW %W
 			tk_popup $w.ctxm %X %Y
 		"
+		bind $i <Shift-Tab> "[list focus $w_cviewer];break"
+		bind $i <Tab>       "[list focus $w_cviewer];break"
 	}
 
 	foreach i [concat $w_columns $w_cviewer] {
@@ -287,8 +289,10 @@ constructor new {i_commit i_path} {
 		bind $i <Control-Key-f> {catch {%W yview scroll  1 pages};break}
 	}
 
+	bind $w_cviewer <Shift-Tab> "[list focus $w_file];break"
+	bind $w_cviewer <Tab>       "[list focus $w_file];break"
 	bind $w_cviewer <Button-1> [list focus $w_cviewer]
-	bind $top <Visibility> [list focus $top]
+	bind $w_file    <Visibility> [list focus $w_file]
 
 	grid configure $w.header -sticky ew
 	grid configure $w.file_pane -sticky nsew
@@ -483,7 +487,11 @@ method _read_file {fd jump} {
 } ifdeleted { catch {close $fd} }
 
 method _exec_blame {cur_w cur_d options cur_s} {
-	set cmd [list nice git blame]
+	set cmd [list]
+	if {![is_Windows] || [is_Cygwin]} {
+		lappend cmd nice
+	}
+	lappend cmd git blame
 	set cmd [concat $cmd $options]
 	lappend cmd --incremental
 	if {$commit eq {}} {