Makefile: allow building without perl
For systems with a missing or broken perl, it is nicer to
explicitly say "we don't want perl" because:
1. The Makefile knows not to bother with Perl-ish things
like Git.pm.
2. We can print a more user-friendly error message
than "foo is not a git command" or whatever the broken
perl might barf
3. Test scripts that require perl can mark themselves and
such and be skipped
This patch implements parts (1) and (2). The perl/
subdirectory is skipped entirely, gitweb is not built, and
any git commands which rely on perl will print a
human-readable message and exit with an error code.
This patch is based on one from Robin H. Johnson.
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/Makefile b/Makefile
index bcf7cbb..34b0539 100644
--- a/Makefile
+++ b/Makefile
@@ -145,6 +145,8 @@
# Define NO_PERL_MAKEMAKER if you cannot use Makefiles generated by perl's
# MakeMaker (e.g. using ActiveState under Cygwin).
#
+# Define NO_PERL if you do not want Perl scripts or libraries at all.
+#
# Define NO_TCLTK if you do not want Tcl/Tk GUI.
#
# The TCL_PATH variable governs the location of the Tcl interpreter
@@ -353,7 +355,10 @@
ALL_PROGRAMS = $(PROGRAMS) $(SCRIPTS)
# what 'all' will build but not install in gitexecdir
-OTHER_PROGRAMS = git$X gitweb/gitweb.cgi
+OTHER_PROGRAMS = git$X
+ifndef NO_PERL
+OTHER_PROGRAMS += gitweb/gitweb.cgi
+endif
# Set paths to tools early so that they can be used for version tests.
ifndef SHELL_PATH
@@ -1104,6 +1109,10 @@
NO_TCLTK=NoThanks
endif
+ifeq ($(PERL_PATH),)
+NO_PERL=NoThanks
+endif
+
QUIET_SUBDIR0 = +$(MAKE) -C # space to separate -C and subdir
QUIET_SUBDIR1 =
@@ -1178,7 +1187,9 @@
$(QUIET_SUBDIR0)git-gui $(QUIET_SUBDIR1) gitexecdir='$(gitexec_instdir_SQ)' all
$(QUIET_SUBDIR0)gitk-git $(QUIET_SUBDIR1) all
endif
+ifndef NO_PERL
$(QUIET_SUBDIR0)perl $(QUIET_SUBDIR1) PERL_PATH='$(PERL_PATH_SQ)' prefix='$(prefix_SQ)' all
+endif
$(QUIET_SUBDIR0)templates $(QUIET_SUBDIR1)
please_set_SHELL_PATH_to_a_more_modern_shell:
@@ -1226,6 +1237,7 @@
chmod +x $@+ && \
mv $@+ $@
+ifndef NO_PERL
$(patsubst %.perl,%,$(SCRIPT_PERL)): perl/perl.mak
perl/perl.mak: GIT-CFLAGS perl/Makefile perl/Makefile.PL
@@ -1285,6 +1297,15 @@
$@.sh > $@+ && \
chmod +x $@+ && \
mv $@+ $@
+else # NO_PERL
+$(patsubst %.perl,%,$(SCRIPT_PERL)) git-instaweb: % : unimplemented.sh
+ $(QUIET_GEN)$(RM) $@ $@+ && \
+ sed -e '1s|#!.*/sh|#!$(SHELL_PATH_SQ)|' \
+ -e 's|@@REASON@@|NO_PERL=$(NO_PERL)|g' \
+ unimplemented.sh >$@+ && \
+ chmod +x $@+ && \
+ mv $@+ $@
+endif # NO_PERL
configure: configure.ac
$(QUIET_GEN)$(RM) $@ $<+ && \
@@ -1603,9 +1624,11 @@
$(RM) -r $(GIT_TARNAME) .doc-tmp-dir
$(RM) $(GIT_TARNAME).tar.gz git-core_$(GIT_VERSION)-*.tar.gz
$(RM) $(htmldocs).tar.gz $(manpages).tar.gz
- $(RM) gitweb/gitweb.cgi
$(MAKE) -C Documentation/ clean
+ifndef NO_PERL
+ $(RM) gitweb/gitweb.cgi
$(MAKE) -C perl clean
+endif
$(MAKE) -C templates/ clean
$(MAKE) -C t/ clean
ifndef NO_TCLTK
diff --git a/unimplemented.sh b/unimplemented.sh
new file mode 100644
index 0000000..5252de4
--- /dev/null
+++ b/unimplemented.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+echo >&2 "fatal: git was built without support for `basename $0` (@@REASON@@)."
+exit 128
