merge(third_party/git): Merge squashed git subtree at v2.23.0

Merge commit '1b593e1ea4' as 'third_party/git'

third_party/git/templates/Makefile

@@ -0,0 +1,66 @@
+# make and install sample templates
+
+ifndef V
+	QUIET = @
+endif
+
+INSTALL ?= install
+TAR ?= tar
+RM ?= rm -f
+prefix ?= $(HOME)
+template_instdir ?= $(prefix)/share/git-core/templates
+# DESTDIR=
+
+ifndef SHELL_PATH
+	SHELL_PATH = /bin/sh
+endif
+ifndef PERL_PATH
+	PERL_PATH = perl
+endif
+
+SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))
+PERL_PATH_SQ = $(subst ','\'',$(PERL_PATH))
+
+# Shell quote (do not use $(call) to accommodate ancient setups);
+DESTDIR_SQ = $(subst ','\'',$(DESTDIR))
+template_instdir_SQ = $(subst ','\'',$(template_instdir))
+
+all: boilerplates.made custom
+
+# Put templates that can be copied straight from the source
+# in a file direc--tory--file in the source.  They will be
+# just copied to the destination.
+
+bpsrc = $(filter-out %~,$(wildcard *--*))
+boilerplates.made : $(bpsrc)
+	$(QUIET)umask 022 && ls *--* 2>/dev/null | \
+	while read boilerplate; \
+	do \
+		case "$$boilerplate" in *~) continue ;; esac && \
+		dst=`echo "$$boilerplate" | sed -e 's|^this|.|;s|--|/|g'` && \
+		dir=`expr "$$dst" : '\(.*\)/'` && \
+		mkdir -p blt/$$dir && \
+		case "$$boilerplate" in \
+		*--) continue;; \
+		esac && \
+		sed -e '1s|#!.*/sh|#!$(SHELL_PATH_SQ)|' \
+		    -e 's|@SHELL_PATH@|$(SHELL_PATH_SQ)|' \
+		    -e 's|@PERL_PATH@|$(PERL_PATH_SQ)|g' $$boilerplate > \
+			blt/$$dst && \
+		if test -x "$$boilerplate"; then rx=rx; else rx=r; fi && \
+		chmod a+$$rx "blt/$$dst" || exit; \
+	done && \
+	date >$@
+
+# If you need build-tailored templates, build them into blt/
+# directory yourself here.
+custom:
+	$(QUIET): no custom templates yet
+
+clean:
+	$(RM) -r blt boilerplates.made
+
+install: all
+	$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$(template_instdir_SQ)'
+	(cd blt && $(TAR) cf - .) | \
+	(cd '$(DESTDIR_SQ)$(template_instdir_SQ)' && umask 022 && $(TAR) xof -)