bpo-30232: Support Git worktree in configure.ac (#1402)
Don't test if .git/HEAD file exists, but only if the .git file (or
directory) exists.
diff --git a/configure b/configure
index 7d1f4ad..8c91735 100755
--- a/configure
+++ b/configure
@@ -5691,7 +5691,7 @@
-if test -e $srcdir/.git/HEAD
+if test -e $srcdir/.git
then
# Extract the first word of "git", so it can be a program name with args.
set dummy git; ac_word=$2
diff --git a/configure.ac b/configure.ac
index e620b08..aa74259 100644
--- a/configure.ac
+++ b/configure.ac
@@ -983,7 +983,7 @@
AC_SUBST(GITTAG)
AC_SUBST(GITBRANCH)
-if test -e $srcdir/.git/HEAD
+if test -e $srcdir/.git
then
AC_CHECK_PROG(HAS_GIT, git, found, not-found)
else