Makefile: make script-related rules usable from subdirectories

diff --git a/Makefile b/Makefile
index 731b6a8834834fe6e6d1852e57752ee38d4321b0..b4af30d271296bafd6a60f39a67647b1caa70612 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -480,9 +480,38 @@ SCRIPT_PERL += git-svn.perl
 SCRIPT_PYTHON += git-remote-testpy.py
 SCRIPT_PYTHON += git-p4.py
 
-SCRIPTS = $(patsubst %.sh,%,$(SCRIPT_SH)) \
-         $(patsubst %.perl,%,$(SCRIPT_PERL)) \
-         $(patsubst %.py,%,$(SCRIPT_PYTHON)) \
+# Generated files for scripts
+SCRIPT_SH_GEN = $(patsubst %.sh,%,$(SCRIPT_SH))
+SCRIPT_PERL_GEN = $(patsubst %.perl,%,$(SCRIPT_PERL))
+SCRIPT_PYTHON_GEN = $(patsubst %.py,%,$(SCRIPT_PYTHON))
+
+# Individual rules to allow e.g.
+# "make -C ../.. SCRIPT_PERL=contrib/foo/bar.perl build-perl-script"
+# from subdirectories like contrib/*/
+.PHONY: build-perl-script build-sh-script build-python-script
+build-perl-script: $(SCRIPT_PERL_GEN)
+build-sh-script: $(SCRIPT_SH_GEN)
+build-python-script: $(SCRIPT_PYTHON_GEN)
+
+.PHONY: install-perl-script install-sh-script install-python-script
+install-sh-script: $(SCRIPT_SH_GEN)
+       $(INSTALL) $(SCRIPT_SH_GEN) '$(DESTDIR_SQ)$(gitexec_instdir_SQ)'
+install-perl-script: $(SCRIPT_PERL_GEN)
+       $(INSTALL) $(SCRIPT_PERL_GEN) '$(DESTDIR_SQ)$(gitexec_instdir_SQ)'
+install-python-script: $(SCRIPT_PYTHON_GEN)
+       $(INSTALL) $(SCRIPT_PYTHON_GEN) '$(DESTDIR_SQ)$(gitexec_instdir_SQ)'
+
+.PHONY: clean-perl-script clean-sh-script clean-python-script
+clean-sh-script:
+       $(RM) $(SCRIPT_SH_GEN)
+clean-perl-script:
+       $(RM) $(SCRIPT_PERL_GEN)
+clean-python-script:
+       $(RM) $(SCRIPT_PYTHON_GEN)
+
+SCRIPTS = $(SCRIPT_SH_GEN) \
+         $(SCRIPT_PERL_GEN) \
+         $(SCRIPT_PYTHON_GEN) \
          git-instaweb
 
 ETAGS_TARGET = TAGS
@@ -973,7 +1002,8 @@ endif
 
 ifeq ($(COMPUTE_HEADER_DEPENDENCIES),auto)
 dep_check = $(shell $(CC) $(ALL_CFLAGS) \
-       -c -MF /dev/null -MMD -MP -x c /dev/null -o /dev/null 2>&1; \
+       -c -MF /dev/null -MQ /dev/null -MMD -MP \
+       -x c /dev/null -o /dev/null 2>&1; \
        echo $$?)
 ifeq ($(dep_check),0)
 override COMPUTE_HEADER_DEPENDENCIES = yes
@@ -1843,7 +1873,7 @@ $(dep_dirs):
 
 missing_dep_dirs := $(filter-out $(wildcard $(dep_dirs)),$(dep_dirs))
 dep_file = $(dir $@).depend/$(notdir $@).d
-dep_args = -MF $(dep_file) -MMD -MP
+dep_args = -MF $(dep_file) -MQ $@ -MMD -MP
 ifdef CHECK_HEADER_DEPENDENCIES
 $(error cannot compute header dependencies outside a normal build. \
 Please unset CHECK_HEADER_DEPENDENCIES and try again)