Bash script for quick blogging

acdw.sh

#!/bin/bash

# Make a new post in acdw.net
# Usage:
# acdw.sh <group> [date]
# it uses the custom function below and dateadd,
# from dateutils.

lifeday() {
    # lifeday [date]
    # find out how many days old you are!  looks
    # for BIRTHDAY env variable, if it doesn't
    # find it, it uses my birthday.  the optional
    # date is the day you want to calculate
    # (defaults to today).  it'll accept whatever
    # `date -d` does.

    BIRTHDAY="${BIRTHDAY:-1990-07-25}"
    TIMEZONE="${TIMEZONE:--6}"

    today="${@:-today}"
    now="$(date -d "${today}" +%s)"
    birth="$(date -d "${BIRTHDAY}" +%s)"

    tzadj="$((TIMEZONE * 60 * 60))"
    # tzadj=0
    dysec=86400 # 60 * 60 * 24

    printf '%05d' "$(( 1 + (now - birth + tzadj) / dysec ))"
}

ld="$(lifeday "$2")"
BIRTHDAY="${BIRTHDAY:-1990-07-25}"

root="$HOME/acdw.net"
file="$root/src/"${ld}".$1"

if [[ ! -e "${file}" ]]; then
    printf '%% \n%% \n%% %s\n\n\n' "$(dateadd $BIRTHDAY $ld)" >$file
fi

$EDITOR $file +;

if ! grep -q -v '^%\|^$' "$file"; then
    echo "Empty!"
    rm "$file"
    exit 1
fi

if [[ "$1" = "poem"  ]]; then
    sed 's/^\([ 	]*[*_(A-Za-z]\)/| &/' $file > ${file}~
    mv ${file}~ ${file}
fi