wrap check in an if to make it less spammy

Author: djdefi

share/github-backup-utils/ghe-ssh

@@ -63,7 +63,10 @@ if echo "$*" | grep "[|;]" >/dev/null || [ $(echo "$*" | wc -l) -gt 1 ]; then
 fi
 
 # Warn if git is not installed, and set GHE_DISABLE_SSH_MUX=true
-command -v git >/dev/null 2>&1 || echo "Warning: SSH multiplexing requires git but it's not installed." && export GHE_DISABLE_SSH_MUX=true
+if [ -z "$GHE_DISABLE_SSH_MUX" ]; then
+  command -v git >/dev/null 2>&1 || echo "Warning: SSH multiplexing requires git but it's not installed."
+  export GHE_DISABLE_SSH_MUX=true
+fi
 
 if [ -z "$GHE_DISABLE_SSH_MUX" ]; then
   controlpath="$TMPDIR/.ghe-sshmux-$(echo -n "$user@$host:$port" | git hash-object --stdin | cut -c 1-8)"