X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=test%2Ftest-lib-common.sh;h=18fa29c0dd86d3b7eb8ab5c3b69bd7f9a35cf89a;hb=5ea5a5557d9ad4cef67e61a83bb81abd44dc7f76;hp=ebbf4cdfa6fd2e727f78d651fdf31dcb8c3ead7d;hpb=4b0c6fb2f1ba989fee554cb8fa2612046d6414a8;p=notmuch

diff --git a/test/test-lib-common.sh b/test/test-lib-common.sh
index ebbf4cdf..18fa29c0 100644
--- a/test/test-lib-common.sh
+++ b/test/test-lib-common.sh
@@ -29,6 +29,20 @@ if [[ -z "$NOTMUCH_SRCDIR" ]] || [[ -z "$NOTMUCH_BUILDDIR" ]]; then
 	exit 1
 fi
 
+# Explicitly require external prerequisite.  Useful when binary is
+# called indirectly (e.g. from emacs).
+# Returns success if dependency is available, failure otherwise.
+test_require_external_prereq () {
+	local binary
+	binary="$1"
+	if [[ ${test_missing_external_prereq_["${binary}"]} == t ]]; then
+		# dependency is missing, call the replacement function to note it
+		eval "$binary"
+	else
+		true
+	fi
+}
+
 backup_database () {
     test_name=$(basename $0 .sh)
     rm -rf $TMP_DIRECTORY/notmuch-dir-backup."$test_name"