[PATCH v2 09/10] test: check if emacs is available in the beginning of test_emacs

[Dmitry Kurochkin <dmitry.kurochkin@gmail.com>]

Unfortunately, this is needed to avoid the emacs waiting loop.
---
 test/test-lib.sh |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/test/test-lib.sh b/test/test-lib.sh
index 5a99216..21e3162 100755
--- a/test/test-lib.sh
+++ b/test/test-lib.sh
@@ -872,40 +872,44 @@ export NOTMUCH_CONFIG=$NOTMUCH_CONFIG
 
 # Here's what we are using here:
 #
 # --no-init-file	Don't load users ~/.emacs
 #
 # --no-site-file	Don't load the site-wide startup stuff
 #
 # --directory		Ensure that the local elisp sources are found
 #
 # --load		Force loading of notmuch.el and test-lib.el
 
 exec emacs --no-init-file --no-site-file \
 	--directory "$TEST_DIRECTORY/../emacs" --load notmuch.el \
 	--directory "$TEST_DIRECTORY" --load test-lib.el \
 	"\$@"
 EOF
 	chmod a+x "$TMP_DIRECTORY/run_emacs"
 }
 
 test_emacs () {
+	# test dependencies beforehand to avoid the waiting loop below
+	test_require_external_prereq emacs || return
+	test_require_external_prereq emacsclient || return
+
 	if [ -z "$EMACS_SERVER" ]; then
 		server_name="notmuch-test-suite-$$"
 		# start a detached session with an emacs server
 		# user's TERM is given to dtach which assumes a minimally
 		# VT100-compatible terminal -- and emacs inherits that
 		TERM=$ORIGINAL_TERM dtach -n "$TMP_DIRECTORY/emacs-dtach-socket.$$" \
 			sh -c "stty rows 24 cols 80; exec '$TMP_DIRECTORY/run_emacs' \
 				--no-window-system \
 				--eval '(setq server-name \"$server_name\")' \
 				--eval '(server-start)' \
 				--eval '(orphan-watchdog $$)'" || return
 		EMACS_SERVER="$server_name"
 		# wait until the emacs server is up
 		until test_emacs '()' 2>/dev/null; do
 			sleep 1
 		done
 	fi
 
 	emacsclient --socket-name="$EMACS_SERVER" --eval "(progn $@)"
 }
-- 
1.7.7.2