Check for existence of 'comm' command

diff --git a/vcsh b/vcsh
index 8e765c41a6edda6a92be12d1b75d1327fe3f2a52..cebd7986b70413096fb9bc839996e0bcd902b3d0 100755 (executable)
--- a/vcsh
+++ b/vcsh
@@ -284,7 +284,13 @@ retire() {
        unset VCSH_DIRECTORY
 }
 
+command_exists() {
+       command -v "$1" >/dev/null 2>&1 || fatal "Could not find '$1' command"
+}
+
 list_untracked() {
+       command_exists comm
+
        temp_file_others=$(mktemp) || fatal 'Could not create temp file'
        temp_file_untracked=$(mktemp) || fatal 'Could not create temp file'
        temp_file_untracked_copy=$(mktemp) || fatal 'Could not create temp file'