maint: prefer $(GIT) over hard-coded "git" in maintainer recipes

* Makefile.am (update-copyright, autodiffs): Use '$(GIT)' instead
of hard-coding 'git'.

diff --git a/Makefile.am b/Makefile.am
index 323d93d..e87bd24 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -269,9 +269,9 @@ autodiffs:
         { \
             rev=$$1 dir=$$2 \
               && echo "$@: will get files from revision $$rev" \
-              && git clone -q --depth 1 "$$am_gitdir" tmp \
+              && $(GIT) clone -q --depth 1 "$$am_gitdir" tmp \
               && $(am__cd) tmp \
-              && git checkout -q "$$rev" \
+              && $(GIT) checkout -q "$$rev" \
               && echo "$@: bootstrapping $$rev" \
               && $(SHELL) ./bootstrap \
               && echo "$@: copying files from $$rev" \
@@ -283,8 +283,8 @@ autodiffs:
         }; \
         outdir=$@.dir \
 ## Before proceeding, ensure the specified revisions truly exist.
-          && git --git-dir="$$am_gitdir" describe $$OLD_COMMIT >/dev/null \
-          && git --git-dir="$$am_gitdir" describe $$NEW_COMMIT >/dev/null \
+          && $(GIT) --git-dir="$$am_gitdir" describe $$OLD_COMMIT >/dev/null \
+          && $(GIT) --git-dir="$$am_gitdir" describe $$NEW_COMMIT >/dev/null \
           && rm -rf $$outdir \
           && mkdir $$outdir \
           && $(am__cd) $$outdir \
@@ -378,5 +378,5 @@ update_copyright_env = \
 
 .PHONY: update-copyright
 update-copyright:
-       git ls-files | grep -Ev 'COPYING|INSTALL' \
+       $(GIT) ls-files | grep -Ev 'COPYING|INSTALL' \
          | $(update_copyright_env) xargs $(srcdir)/lib/$@