MinGW: Change the name of hook scripts to make them not executable by default.

Since on Windows there is no 'executable' bit whose absence would deny
execution of a script, we must change the hook scripts' names entirely
to inhibit that they can be invoked by the tools.

Makefile

@@ -434,6 +434,7 @@ ifneq (,$(findstring MINGW,$(uname_S)))
 	COMPAT_OBJS += compat/mingw.o compat/fnmatch.o
 	EXTLIBS += -lws2_32 -lregex
 	X = .exe
+	NOEXECTEMPL = .noexec
 endif
 ifneq (,$(findstring arm,$(uname_M)))
 	ARM_SHA1 = YesPlease
@@ -635,7 +636,7 @@ endif
 
 all::
 	$(MAKE) -C perl PERL_PATH='$(PERL_PATH_SQ)' prefix='$(prefix_SQ)' all
-	$(MAKE) -C templates
+	$(MAKE) -C templates NOEXECTEMPL='$(NOEXECTEMPL)'
 
 strip: $(PROGRAMS) git$X
 	$(STRIP) $(STRIP_OPTS) $(PROGRAMS) git$X

templates/Makefile

@@ -5,6 +5,8 @@ TAR ?= tar
 prefix ?= $(HOME)
 template_dir ?= $(prefix)/share/git-core/templates/
 # DESTDIR=
+# set NOEXECTEMPL to non-empty to change the names of hook scripts
+# so that the tools will not find them
 
 # Shell quote (do not use $(call) to accomodate ancient setups);
 DESTDIR_SQ = $(subst ','\'',$(DESTDIR))
@@ -27,7 +29,11 @@ boilerplates.made : $(bpsrc)
 		mkdir -p blt/$$dir && \
 		case "$$boilerplate" in \
 		*--) ;; \
-		*) cp $$boilerplate blt/$$dst ;; \
+		*) if head -1 $$boilerplate | grep -q '^#!/'; then \
+			cp $$boilerplate blt/$${dst}$(NOEXECTEMPL); \
+		   else \
+			cp $$boilerplate blt/$$dst; \
+		   fi ;; \
 		esac || exit; \
 	done || exit
 	date >$@