maint: require that commit messages be of a certain form

* bootstrap.conf (bootstrap_epilogue): Merge from coreutils, so that
a local commit hook will now help enforce consistent commit messages.
* Makefile.am (check-git-hook-script-sync): New rule, largely copied
from coreutils.
* scripts/git-hooks/commit-msg: New file, from coreutils, but
with adapted list of program names.
* scripts/git-hooks/applypatch-msg: New file, from git.
* scripts/git-hooks/pre-applypatch: Likewise.
* scripts/git-hooks/pre-commit: Likewise.

1 files changed, 25 insertions, 0 deletions

diff --git a/bootstrap.conf b/bootstrap.conf
index 828ffef..ac3c278 100644
--- a/bootstrap.conf
+++ b/bootstrap.conf
@@ -129,4 +129,29 @@ bootstrap_post_import_hook()
 bootstrap_epilogue()
 {
   perl -pi -e "s/\@PACKAGE\@/$package/g" README-release
+
+  # Since this is a "GNU" package, replace this line
+  #   if LC_ALL=C grep 'GNU @PACKAGE@' $(top_srcdir)/* 2>/dev/null \
+  #      | grep -v 'libtool:' >/dev/null; then
+  # with this:
+  #   if true; then
+  # Why?  That pipeline searches all files in $(top_srcdir), and if you
+  # happen to have large files (or apparently large sparse files), the
+  # first grep may well run out of memory.
+  perl -pi -e 's/if LC_ALL=C grep .GNU .PACKAGE.*; then/if true; then/' \
+    po/Makefile.in.in
+
+  # Install our git hooks, as long as "cp" accepts the --backup option,
+  # so that we can back up any existing files.
+  case $(cp --help) in *--backup*) backup=1;; *) backup=0;; esac
+  if test $backup = 1; then
+    hooks=$(cd scripts/git-hooks && git ls-files)
+    for f in $hooks; do
+      # If it is identical, skip it.
+      cmp scripts/git-hooks/$f .git/hooks/$f > /dev/null \
+        && continue
+      cp --backup=numbered scripts/git-hooks/$f .git/hooks
+      chmod a-w .git/hooks/$f
+    done
+  fi
 }