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#!/bin/sh
todo="$HOME/docs/filios"/todo
die() { >&2 printf '%s\n' "$*"; exit 1; }
usage()
{
cat <<EOF
usage: td [COMMAND] [ARGUMENT]
td lists to-do's
COMMANDS
new TEXT... add a new to-do
clear remove all to-do's
delete NUMBER delete a to-do by number
grep REGEX show to-do's matching regex
help show usage
move NUMBER NUMBER change priority of a to-do
edit edit file in \$EDITOR
EOF
exit 1
}
wrong_usage() { >&2 printf 'Wrong usage!\n'; usage; }
list_todos() {
[ ! -r "$todo" ] && die "No to-do's."
[ "$(wc -l < "$todo")" -eq 0 ] && die "No to-do's."
awk '{print NR ": " $0}' "$todo"
}
# shellcheck disable=SC2142
### MAIN
# Arguments without an option
case "$1" in
c*) rm -f "$todo"; >&2 printf 'Cleared.\n' ;;
h*) usage ;;
e*) $EDITOR "$todo" ;;
"") list_todos ;;
*) false ;;
esac && exit
arg="$1"
shift
[ "$1" ] || wrong_usage
case "$arg" in
n*)
printf '%s\n' "$*" >> "$todo"
list_todos ;;
d*)
sed -i -n "$1!p" "$todo"
list_todos ;;
g*) list_todos | grep "$*" ;;
m*)
[ "$2" ] || wrong_usage
line="$(list_todos | sed "/^$1:/!d;s/^$1: //")"
sed -i "${1}d;${2}i${line}" "$todo"
list_todos ;;
*) wrong_usage ;;
esac
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