'build' scripts before installing.

Earlier we renamed git-foo.sh to git-foo while installing, which
was mostly done by inertia than anything else.  This however
made writing tests to use scripts harder.

This patch builds the scripts the same way as we build binaries
from their sources.  As a side effect, you can now specify
non-standard paths you have your Perl binary is in when running
the make.
Signed-off-by: NJunio C Hamano <junkio@cox.net>

Makefile

@@ -142,6 +142,13 @@ ifeq ($(shell uname -s),SunOS)
 	PLATFORM_DEFINES += -DNO_GETDOMAINNAME=1
 endif
 
+ifndef SHELL_PATH
+	SHELL_PATH = /bin/sh
+endif
+ifndef PERL_PATH
+	PERL_PATH = /usr/bin/perl
+endif
+
 ifndef NO_OPENSSL
 	LIB_OBJS += epoch.o
 	OPENSSL_LIBSSL = -lssl
@@ -179,21 +186,32 @@ endif
 
 DEFINES += '-DSHA1_HEADER=$(SHA1_HEADER)'
 
-SCRIPTS = $(SCRIPT_SH) $(SCRIPT_PERL) gitk
+SCRIPTS = $(patsubst %.sh,%,$(SCRIPT_SH)) \
+	  $(patsubst %.perl,%,$(SCRIPT_PERL)) gitk
 
 ### Build rules
 
-all: $(PROGRAMS) git.sh
+all: $(PROGRAMS) $(SCRIPTS)
 
 all:
 	$(MAKE) -C templates
 
-git.sh: git.sh.in Makefile
+git: git.sh Makefile
 	rm -f $@+ $@
-	sed -e 's/@@GIT_VERSION@@/$(GIT_VERSION)/g' <$@.in >$@+
+	sed -e 's/@@GIT_VERSION@@/$(GIT_VERSION)/g' <$@.sh >$@+
 	chmod +x $@+
 	mv $@+ $@
 
+$(filter-out git,$(patsubst %.sh,%,$(SCRIPT_SH))) : % : %.sh
+	rm -f $@
+	sed -e '1s|#!.*/sh|#!$(SHELL_PATH)|' $@.sh >$@
+	chmod +x $@
+
+$(patsubst %.perl,%,$(SCRIPT_PERL)) : % : %.perl
+	rm -f $@
+	sed -e '1s|#!.*perl|#!$(PERL_PATH)|' $@.perl >$@
+	chmod +x $@
+
 %.o: %.c
 	$(CC) -o $*.o -c $(ALL_CFLAGS) $<
 %.o: %.S
@@ -250,19 +268,8 @@ check:
 
 install: $(PROGRAMS) $(SCRIPTS)
 	$(INSTALL) -m755 -d $(DESTDIR)$(bindir)
-	$(INSTALL) $(PROGRAMS) $(DESTDIR)$(bindir)
-	@for s in $(SCRIPTS); \
-	do \
-		case "$$s" in \
-		*.*) \
-			e=`expr "$$s" : '\(.*\)\.[^.]*$$'` ;; \
-		*) \
-			e="$$s" ;; \
-		esac && \
-		echo ": install $$s $(DESTDIR)$(bindir)/$$e" && \
-		$(INSTALL) $$s $(DESTDIR)$(bindir)/$$e || exit; \
-	done
-	$(INSTALL) git-revert.sh $(DESTDIR)$(bindir)/git-cherry-pick
+	$(INSTALL) $(PROGRAMS) $(SCRIPTS) $(DESTDIR)$(bindir)
+	$(INSTALL) git-revert $(DESTDIR)$(bindir)/git-cherry-pick
 	sh ./cmd-rename.sh $(DESTDIR)$(bindir)
 	$(MAKE) -C templates install
 
@@ -299,7 +306,8 @@ deb: dist
 
 clean:
 	rm -f *.o mozilla-sha1/*.o ppc/*.o $(PROGRAMS) $(LIB_FILE)
-	rm -f git-core.spec git.sh
+	rm -f $(filter-out gitk,$(SCRIPTS))
+	rm -f git-core.spec
 	rm -rf $(GIT_TARNAME)
 	rm -f $(GIT_TARNAME).tar.gz git-core_$(GIT_VERSION)-*.tar.gz
 	rm -f git-core_$(GIT_VERSION)-*.deb git-core_$(GIT_VERSION)-*.dsc

t/t1005-read-tree-m-2way-emu23.sh

@@ -25,7 +25,7 @@ In the test, these paths are used:
 read_tree_twoway () {
     git-read-tree --emu23 "$1" "$2" &&
     git-ls-files --stage &&
-    git-merge-index ../../git-merge-one-file.sh -a &&
+    git-merge-index git-merge-one-file -a &&
     git-ls-files --stage
 }
 

t/t3200-branch.sh

@@ -13,12 +13,12 @@ handled.  Specifically, that a bogus branch is not created.
 test_expect_success \
     'prepare an trivial repository' \
     'echo Hello > A &&
-     ../../git-update-index --add A &&
-     ../../git-commit.sh -m "Initial commit."'
+     git-update-index --add A &&
+     git-commit -m "Initial commit."'
 
 test_expect_failure \
     'git branch --help should return error code' \
-    '../../git-branch.sh --help'
+    'git-branch --help'
 
 test_expect_failure \
     'git branch --help should not have created a bogus branch' \

t/t5400-send-pack.sh

@@ -21,9 +21,9 @@ test_expect_success setup '
 	    parent=$commit || return 1
 	done &&
 	echo "$commit" >.git/HEAD &&
-	git-clone.sh -l ./. victim &&
+	git-clone -l ./. victim &&
 	cd victim &&
-	git-log.sh &&
+	git-log &&
 	cd .. &&
 	echo $zero >.git/HEAD &&
 	parent=$zero &&
@@ -35,7 +35,7 @@ test_expect_success setup '
 	done &&
 	echo "$commit" >.git/HEAD &&
 	echo Rebase &&
-	git-log.sh'
+	git-log'
 
 test_expect_success \
         'pushing rewound head should not barf but require --force' '