I thought there was such a tool in Jekyll

Author: Magicloud

crap.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+set -eu -o pipefail
+
+title="${1}"
+filename="$(tr '[:upper:]' '[:lower:]' <<< "${title}" | tr ' ' '-' )"
+
+d="$(date +'%Y-%m-%d')"
+dt="$(date +'%Y-%m-%d %H:%M:%S %z')"
+
+cat > "_posts/${d}-${filename}.markdown" << EOF
+---
+layout: post
+title:  "${title}"
+date:   ${dt}
+categories:
+---
+EOF