Shell Script that creates a Jekyll blog post file for today and includes the current time into the front-matter

today.sh

#!/bin/sh
# Jekyll, the static website generator (https://jekyllrb.com/) , requires you to create blog
# posts with the "date" in their title so they are properly sorted on the website. 
# The problem is, I don't want to keep typing that shit. I want it done for me for todays date and I always 
# want the time that I created this blog post to be put in the "front matter" (https://jekyllrb.com/docs/front-matter/)
# so I can see how long it's been since I started writing if I wanted.

# Usage: today.sh <the entire blog post title>
# Example: today.sh its a very magical day today

#####
# Install
# It's easy, just copy the contents of this file into:
# today.sh 
# on your local drive, in your Jekyll directory. 
# After you created the file, run:
# $ chmod 755 today.sh
# Then you'll be able to run it with:
# $ ./today.sh

# TODO: Have this file only be able to run in a current directory that has the jekyll site and to generate the 
# file into the _drafts folder if it exists, if not exists, then generate the file in the _posts directory

# Generate a new post with the time stamp and user-supplied title

DATE=`date +"%Y-%m-%d"`
TIME=`date +'%H:%M %p %Z'`

while [ -n "$1" ]; do
    case "$1" in
        -y) DATE=`date -v-1d +"%Y-%m-%d"` ;;
        --) 
            shift
            break
            ;;
    esac
    shift
done

# Replace white space with dashes
UNDERLINED_POST=`echo $@ | sed -e 's/ /\-/g'`

DIRECTORY="_posts"
FILENAME="${DATE}-${UNDERLINED_POST}.md"
FULL_PATH="$DIRECTORY/$FILENAME"

if [ -d $DIRECTORY ]; then
  echo "Creating $UNDERLINED_POST blog post"
  touch $FULL_PATH
fi

# Add front-matter
echo "---\nDate: ${DATE}\nTime: ${TIME}\n---" > $FULL_PATH