Make new Jekyll draft post

newPost

#!/bin/bash

# This bash script will setup a new HTML Jekyll draft blog post and open it for editing in Notepad++
#
# See https://www.mslinn.com/blog/2020/08/16/new-jekyll-post.html
#
# Original by Katie Harron - @pibby  from https://gist.github.com/pibby/6911493
# Modified by Mike Slinn   - @mslinn
#  - added length checks for title and description
#  - added reprompt for when length check fails
#  - launch notepad instead of Mac editor
#  - modified front matter
#  - Added optional date as command line parameter

function checkLength {
  # $1 - minimum length
  # $2 - maximum length
  # $3 - string to test
  length=${#3}
  if (( length < $1 )); then
    >&2 echo "$(($1 - $length)) characters too short, please edit"
    return 1
  elif (( length > $2 )); then
    >&2 echo "$(( $length - $2 )) characters too long, please edit"
    return 2
  else
    >&2 echo "$length characters, excellent!"
    return 0
  fi
}

function reprompt {
  # $1 - name of front matter variable
  # $2 - minimum length of user-provided value
  # $3 - maximum length of user-provided value

  if [ -z "$1" ]; then 2> echo "Error: no front matter variable provided"; exit 1; fi
  if [ -z "$2" ]; then 2> echo "Error: no minimum length provided"; exit 1; fi
  if [ -z "$3" ]; then 2> echo "Error: no maximum length provided"; exit 1; fi

  NAME="$1"
  MIN="$2"
  MAX="$3"

  LEADIN="'_%0.s'"
  SPACES="$( eval $(echo printf "$LEADIN" {1..$MIN}) )"
  (( COUNT= (($MAX * 10) - ($MIN * 10) + 5) / 10 ))
  NUMBERS="$( eval $(echo printf '"0123456789%0.s"' {1..$COUNT}) )"
  (( CHARS= $MAX - $MIN ))
  VALUE=""
  #>&2 printf "SPACES='$SPACES'\n"
  #>&2 printf "NUMBERS='$NUMBERS'\n"
  while :
  do
    >&2 printf "Post $1 (30-60 characters):\n$SPACES${NUMBERS:1:$CHARS}\n"
    read -e -i "$VALUE" VALUE
    if $(checkLength "$MIN" "$MAX" "$VALUE"); then break; fi
  done
  >&2 echo
  echo "$VALUE"
}

title="$( reprompt Title 30 60 )"

ptitle=${title// /-}                  # convert spaces in title to hyphens
# Convert title to lowercase and remove slashes
plc="$( echo "$ptitle" | tr '[:upper:]' '[:lower:]' | tr -d '/' )"

if [ "$1" ]; then
  pdate="$1"                            # TODO verify $1 is YYYY-mm-dd
else
  pdate="$( date +%Y-%m-%d )" 	        # create date as YYYY-mm-dd
fi

filename=./_drafts/$pdate-$plc.html 	# location to create the new file as year-month-day-title.md
mkdir -p ./_drafts
touch "$filename"                     # create the new blank post

desc="$( reprompt Description 60 150 )"
printf "Post Categories (comma delimited): "
read categories
printf "Post Tags (comma delimited): "
read tags
printf "Post Keywords (comma delimited): "
read keyw
printf "Banner image (bg_ .jpg): "
read img

cat << EOF > "$filename" 	            # fill out YAML Front Matter and insert into the new file
---
categories: [$categories]
description: $desc
image: $img
keywords: [$keyw]
last_modified_at: $pdate
layout: blog
title: $title
tags: [$tags]
---
EOF

echo "Created '$filename'"
notepad "$filename"  # Invokes mslinn's notepad++ script