test: Emit a friendly error message if run with bash < 4.0.

[notmuch] / test / notmuch-test

diff --git a/test/notmuch-test b/test/notmuch-test
index 7feb5bdf5fd14d1ef26ec10a912ee1add51760d7..60c3ecbcbe9968ac0dcd5fe2798a32ff6ec5cbf0 100755 (executable)
--- a/test/notmuch-test
+++ b/test/notmuch-test
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 
 # Run tests
 #
@@ -6,6 +6,14 @@
 #
 # Adapted from a Makefile to a shell script by Carl Worth (2010)
 
+if [ ${BASH_VERSINFO[0]} -lt 4 ]; then
+    echo "Error: The notmuch test suite requires a bash version >= 4.0"
+    echo "due to use of associative arrays within the test suite."
+    echo "Please try again with a newer bash (or help us fix the"
+    echo "test suite to be more portable). Thanks."
+    exit 1
+fi
+
 cd $(dirname "$0")
 
 TESTS="basic new search json thread-naming reply dump-restore uuencode thread-order author-order from-guessing long-id encoding emacs"