git-gui: Honor TCLTK_PATH if supplied

Mimick what we do for gitk.  Since you do have a source file,
git-gui.sh, which is separate from the target, it should be much
easier in git-gui's Makefile.

Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

diff --git a/Makefile b/Makefile
index b82789ead6255b33be0f1ed2029a91611cea3072..b29d7d1e68d2489fd07612c8d0062d3491f04719 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -28,6 +28,8 @@ ifndef V
        QUIET_BUILT_IN = @echo '   ' BUILTIN $@;
 endif
 
+TCLTK_PATH ?= wish
+
 ifeq ($(findstring $(MAKEFLAGS),s),s)
 QUIET_GEN =
 QUIET_BUILT_IN =
@@ -36,10 +38,12 @@ endif
 DESTDIR_SQ = $(subst ','\'',$(DESTDIR))
 gitexecdir_SQ = $(subst ','\'',$(gitexecdir))
 SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))
+TCLTK_PATH_SQ = $(subst ','\'',$(TCLTK_PATH))
 
 $(patsubst %.sh,%,$(SCRIPT_SH)) : % : %.sh
        $(QUIET_GEN)rm -f $@ $@+ && \
        sed -e '1s|#!.*/sh|#!$(SHELL_PATH_SQ)|' \
+               -e 's|^exec wish "$$0"|exec $(subst |,'\|',$(TCLTK_PATH_SQ)) "$$0"|' \
                -e 's/@@GITGUI_VERSION@@/$(GITGUI_VERSION)/g' \
                $@.sh >$@+ && \
        chmod +x $@+ && \