-find_notmuch_path ()
-{
- dir="$1"
-
- while [ -n "$dir" ]; do
- bin="$dir/notmuch"
- if [ -x "$bin" ]; then
- echo "$dir"
- return
- fi
- dir="$(dirname "$dir")"
- if [ "$dir" = "/" ]; then
- break
+if [[ -z "$NOTMUCH_SRCDIR" ]] || [[ -z "$NOTMUCH_BUILDDIR" ]]; then
+ echo "internal: srcdir or builddir not set" >&2
+ 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