[PATCH] Added options NO_TCLTK, WITH_P4IMPORT and --with-tcltk/--without-tcltk.

[Eygene Ryabinkin <rea-git@codelabs.ru>]

The following make options were added:
- NO_TCLTK: disables building and installation of the git GUI part
that depends on the Tcl/Tk.
- WITH_P4IMPORT: enables the installation of the Perforce import
script.

Configure's options --with-tcltk and --without-tcltk were added and
configure script teached to search for the Tcl/Tk interpreter.
The GUI part will not be installed if system lacks Tcl/Tk binary.

Internal make option TCLTK was added: it governs the location of
the Tcl/Tk interpreter, so user can specify its own binary location
either with './configure --with-tcltk=/path/to/binary' or
'TCLTK=/path/to/binary make'.

Signed-off-by: Eygene Ryabinkin <rea-git@codelabs.ru>
---
 Makefile         |   56 ++++++++++++++++++++++++++++++++++++++++++++++++++++-
 config.mak.in    |    1 +
 configure.ac     |   19 ++++++++++++++++++
 git-gui/Makefile |    1 +
 4 files changed, 75 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 51c1fed..3cccf79 100644
--- a/Makefile
+++ b/Makefile
@@ -110,6 +110,13 @@ all::
 # Define NO_PERL_MAKEMAKER if you cannot use Makefiles generated by perl's
 # MakeMaker (e.g. using ActiveState under Cygwin).
 #
+# Define NO_TCLTK if you do not want Tcl/Tk GUI.
+#
+# The TCLTK variable governs the location of the Tck/Tk interpreter.
+# If not set it defaults to the bare 'wish'.
+#
+# Define WITH_P4IMPORT to build and install Python git-p4import script.
+#
 
 GIT-VERSION-FILE: .FORCE-GIT-VERSION-FILE
 	@$(SHELL_PATH) ./GIT-VERSION-GEN
@@ -159,6 +166,7 @@ AR = ar
 TAR = tar
 INSTALL = install
 RPMBUILD = rpmbuild
+TCLTK ?= wish
 
 # sparse is architecture-neutral, which means that we need to tell it
 # explicitly what architecture to check for. Fix this up for yours..
@@ -196,9 +204,20 @@ SCRIPT_PERL = \
 	git-svnimport.perl git-cvsexportcommit.perl \
 	git-send-email.perl git-svn.perl
 
+SCRIPT_PYTHON = \
+	git-p4import.py
+
+ifdef WITH_P4IMPORT
 SCRIPTS = $(patsubst %.sh,%,$(SCRIPT_SH)) \
 	  $(patsubst %.perl,%,$(SCRIPT_PERL)) \
+	  $(patsubst %.py,%,$(SCRIPT_PYTHON)) \
 	  git-status git-instaweb
+else
+SCRIPTS = $(patsubst %.sh,%,$(SCRIPT_SH)) \
+	  $(patsubst %.perl,%,$(SCRIPT_PERL)) \
+	  git-status git-instaweb
+endif
+
 
 # ... and all the rest that could be moved out of bindir to gitexecdir
 PROGRAMS = \
@@ -241,6 +260,9 @@ endif
 ifndef PERL_PATH
 	PERL_PATH = /usr/bin/perl
 endif
+ifndef PYTHON_PATH
+	PYTHON_PATH = /usr/local/bin/python
+endif
 
 export PERL_PATH
 
@@ -608,6 +630,10 @@ ifdef NO_PERL_MAKEMAKER
 	export NO_PERL_MAKEMAKER
 endif
 
+ifeq ($(TCLTK),)
+NO_TCLTK=YesPlease
+endif
+
 QUIET_SUBDIR0  = $(MAKE) -C # space to separate -C and subdir
 QUIET_SUBDIR1  =
 
@@ -646,6 +672,7 @@ prefix_SQ = $(subst ','\'',$(prefix))
 
 SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))
 PERL_PATH_SQ = $(subst ','\'',$(PERL_PATH))
+PYTHON_PATH_SQ = $(subst ','\'',$(PYTHON_PATH))
 
 LIBS = $(GITLIBS) $(EXTLIBS)
 
@@ -667,7 +694,9 @@ ifneq (,$X)
 endif
 
 all::
+ifndef NO_TCLTK
 	$(QUIET_SUBDIR0)git-gui $(QUIET_SUBDIR1) all
+endif
 	$(QUIET_SUBDIR0)perl $(QUIET_SUBDIR1) PERL_PATH='$(PERL_PATH_SQ)' prefix='$(prefix_SQ)' all
 	$(QUIET_SUBDIR0)templates $(QUIET_SUBDIR1)
 
@@ -699,6 +728,15 @@ $(patsubst %.sh,%,$(SCRIPT_SH)) : % : %.sh
 
 $(patsubst %.perl,%,$(SCRIPT_PERL)): perl/perl.mak
 
+$(patsubst %.py,%,$(SCRIPT_PYTHON)) : % : %.py
+	rm -f $@ $@+
+	sed -e '1s|#!.*/python|#!$(PYTHON_PATH_SQ)|' \
+	    -e 's/@@GIT_VERSION@@/$(GIT_VERSION)/g' \
+	    -e 's/@@NO_CURL@@/$(NO_CURL)/g' \
+	    $@.py >$@+
+	chmod +x $@+
+	mv $@+ $@
+
 perl/perl.mak: GIT-CFLAGS
 	$(QUIET_SUBDIR0)perl $(QUIET_SUBDIR1) PERL_PATH='$(PERL_PATH_SQ)' prefix='$(prefix_SQ)' $(@F)
 
@@ -892,10 +930,16 @@ install: all
 	$(INSTALL) -d -m755 '$(DESTDIR_SQ)$(bindir_SQ)'
 	$(INSTALL) -d -m755 '$(DESTDIR_SQ)$(gitexecdir_SQ)'
 	$(INSTALL) $(ALL_PROGRAMS) '$(DESTDIR_SQ)$(gitexecdir_SQ)'
-	$(INSTALL) git$X gitk '$(DESTDIR_SQ)$(bindir_SQ)'
+	$(INSTALL) git$X '$(DESTDIR_SQ)$(bindir_SQ)'
+ifndef NO_TCLTK
+	sed -i .bak -e'1,3s|^exec .* "$$0"|exec '"$(TCLTK)"' "$$0"|' gitk && rm -f gitk.bak
+	$(INSTALL) gitk '$(DESTDIR_SQ)$(bindir_SQ)'
+endif
 	$(MAKE) -C templates DESTDIR='$(DESTDIR_SQ)' install
 	$(MAKE) -C perl prefix='$(prefix_SQ)' install
-	$(MAKE) -C git-gui install
+ifndef NO_TCLTK
+	$(MAKE) -C git-gui TCLTK='$(TCLTK)' install
+endif
 	if test 'z$(bindir_SQ)' != 'z$(gitexecdir_SQ)'; \
 	then \
 		ln -f '$(DESTDIR_SQ)$(bindir_SQ)/git$X' \
@@ -929,11 +973,17 @@ dist: git.spec git-archive
 	@mkdir -p $(GIT_TARNAME)
 	@cp git.spec $(GIT_TARNAME)
 	@echo $(GIT_VERSION) > $(GIT_TARNAME)/version
+ifndef NO_TCLTK
 	@$(MAKE) -C git-gui TARDIR=../$(GIT_TARNAME)/git-gui dist-version
 	$(TAR) rf $(GIT_TARNAME).tar \
 		$(GIT_TARNAME)/git.spec \
 		$(GIT_TARNAME)/version \
 		$(GIT_TARNAME)/git-gui/version
+else
+	$(TAR) rf $(GIT_TARNAME).tar \
+		$(GIT_TARNAME)/git.spec \
+		$(GIT_TARNAME)/version
+endif
 	@rm -rf $(GIT_TARNAME)
 	gzip -f -9 $(GIT_TARNAME).tar
 
@@ -974,7 +1024,9 @@ clean:
 	rm -f gitweb/gitweb.cgi
 	$(MAKE) -C Documentation/ clean
 	$(MAKE) -C perl clean
+ifndef NO_TCLTK
 	$(MAKE) -C git-gui clean
+endif
 	$(MAKE) -C templates/ clean
 	$(MAKE) -C t/ clean
 	rm -f GIT-VERSION-FILE GIT-CFLAGS
diff --git a/config.mak.in b/config.mak.in
index 9a57840..8e441dd 100644
--- a/config.mak.in
+++ b/config.mak.in
@@ -6,6 +6,7 @@ CFLAGS = @CFLAGS@
 AR = @AR@
 TAR = @TAR@
 #INSTALL = @INSTALL@		# needs install-sh or install.sh in sources
+TCLTK = @TCLTK@
 
 prefix = @prefix@
 exec_prefix = @exec_prefix@
diff --git a/configure.ac b/configure.ac
index 3a8e778..a95dbfb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -75,6 +75,12 @@ GIT_ARG_SET_PATH(shell)
 # Define PERL_PATH to provide path to Perl.
 GIT_ARG_SET_PATH(perl)
 #
+# Declare the with-tcltk/without-tcltk options.
+AC_ARG_WITH(tcltk,
+AS_HELP_STRING([--with-tcltk],[use Tcl/Tk GUI (default is YES)])
+AS_HELP_STRING([],[ARG is the full path to the Tcl/Tk interpreter]),\
+GIT_PARSE_WITH(tcltk))
+#
 
 
 ## Checks for programs.
@@ -84,6 +90,19 @@ AC_PROG_CC([cc gcc])
 #AC_PROG_INSTALL		# needs install-sh or install.sh in sources
 AC_CHECK_TOOL(AR, ar, :)
 AC_CHECK_PROGS(TAR, [gtar tar])
+# TCLTK will be set to some value if we want Tcl/Tk
+# or will be empty otherwise.
+if test -z "$NO_TCLTK"; then
+  if test "$with_tcltk" = "yes" -o "$with_tcltk" = ""; then
+    AC_CHECK_PROGS(TCLTK, [wish], )
+  elif ! test -x "$with_tcltk"; then
+    AC_MSG_ERROR([Tcl/Tk interpreter was not found in $with_tcltk])
+  else
+    AC_MSG_RESULT([Using Tcl/Tk interpreter $with_tcltk])
+    TCLTK="$with_tcltk"
+    AC_SUBST(TCLTK)
+  fi
+fi
 
 ## Checks for libraries.
 AC_MSG_NOTICE([CHECKS for libraries])
diff --git a/git-gui/Makefile b/git-gui/Makefile
index b82789e..09c28ed 100644
--- a/git-gui/Makefile
+++ b/git-gui/Makefile
@@ -55,6 +55,7 @@ all:: $(ALL_PROGRAMS)
 
 install: all
 	$(INSTALL) -d -m755 '$(DESTDIR_SQ)$(gitexecdir_SQ)'
+	sed -i .bak -e'1,3s|^exec .* "$$0"|exec '"$(TCLTK)"' "$$0"|' git-gui && rm git-gui.bak
 	$(INSTALL) git-gui '$(DESTDIR_SQ)$(gitexecdir_SQ)'
 	$(foreach p,$(GITGUI_BUILT_INS), rm -f '$(DESTDIR_SQ)$(gitexecdir_SQ)/$p' && ln '$(DESTDIR_SQ)$(gitexecdir_SQ)/git-gui' '$(DESTDIR_SQ)$(gitexecdir_SQ)/$p' ;)
 
-- 
1.5.0.3-dirty