Shell script to generate <tag_name>.md file automatically for a jekyll blog.

task.sh

#!/bin/bash
target=(_posts/*.md)
prv_last_file=`cat last_file.txt`
tag_template=`cat tag_template.md`

for ((i=${#target[@]}-1; i>=0; i--)); do
    if [ "$prv_last_file" == "${target[$i]}" ]; then
        echo ${target[${#target[@]}-1]} > last_file.txt
        echo "We are done, Thank you!"
        break
    else
        content=`cat ${target[$i]} | grep -m1 "tags\s*:"`
        tags=`echo $content | cut -d: -f2-`
        for tag in $tags; do
            clean_tag=`echo $tag | tr -d '[:space:]'`
            if [ -e "tag/$clean_tag.md" ]; then
                continue
            else
                echo "${tag_template//tag_name/$clean_tag}" >> tag/$clean_tag.md
                echo "$clean_tag file created successfully."
            fi 
        done
        echo ${target[${#target[@]}-1]} > last_file.txt
    fi
done