133 lines
2.6 KiB
Bash
Executable file
133 lines
2.6 KiB
Bash
Executable file
#!/usr/bin/env bash
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set -euo pipefail
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HABITS_FILE="${HABITS_FILE:-$HOME/.local/share/os/habits.md}"
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usage() {
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cat <<'EOF'
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Usage: habits <command>
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Commands:
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open Open the habits file in $EDITOR
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new Add a new day to the habits file
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left Print today's habits that are not done yet
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EOF
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}
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ensure_file() {
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mkdir -p "$(dirname "$HABITS_FILE")"
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touch "$HABITS_FILE"
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}
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date_add_days() {
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local day="$1" offset="$2" date_arg epoch
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date_arg="$day $offset days"
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if date -d "$date_arg" +%F >/dev/null 2>&1; then
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date -d "$date_arg" +%F
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return
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fi
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# BSD/macOS date. Parse at noon to avoid midnight DST edges.
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epoch="$(date -j -f '%F %H:%M:%S' "$day 12:00:00" +%s)"
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epoch=$((epoch + offset * 86400))
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date -r "$epoch" +%F
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}
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open_habits() {
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ensure_file
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"${EDITOR:-vi}" "$HABITS_FILE"
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}
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print_day() {
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local day="$1"
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printf '# %s\n\n' "$day"
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printf '## Habits\n\n'
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while IFS= read -r habit; do
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[ -n "$habit" ] && printf -- '- [ ] %s\n' "$habit"
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done <<< "$HABITS"
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printf '\n## Metrics \n\n'
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while IFS= read -r metric; do
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[ -n "$metric" ] && printf -- '- %s\n' "$metric:"
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done <<< "$METRICS"
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printf '\n'
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}
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new_day() {
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ensure_file
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local today latest start day tmp added
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today="$(date +%F)"
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latest="$(grep -E '^# [0-9]{4}-[0-9]{2}-[0-9]{2}$' "$HABITS_FILE" | sed 's/^# //' | sort | tail -n 1 || true)"
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if [ -n "$latest" ] && [[ "$latest" > "$today" ]]; then
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echo "Latest habits entry is in the future: $latest" >&2
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exit 1
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fi
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if [ "$latest" = "$today" ]; then
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echo "Habits entries already exist through $today: $HABITS_FILE"
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return
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fi
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if [ -n "$latest" ]; then
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start="$(date_add_days "$latest" 1)"
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else
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start="$today"
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fi
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tmp="$(mktemp)"
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added=0
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{
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day="$today"
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while [[ "$day" > "$start" || "$day" = "$start" ]]; do
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print_day "$day"
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added=$((added + 1))
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day="$(date_add_days "$day" -1)"
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done
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cat "$HABITS_FILE"
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} > "$tmp"
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mv "$tmp" "$HABITS_FILE"
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echo "Added $added habits entr$( [ "$added" -eq 1 ] && printf 'y' || printf 'ies' ) through $today to $HABITS_FILE"
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}
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remaining_habits() {
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ensure_file
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local date
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date="$(date +%F)"
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awk -v date="$date" '
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$0 == "# " date { in_day = 1; next }
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in_day && /^# / { exit }
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in_day && /^## Habits[[:space:]]*$/ { in_habits = 1; next }
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in_day && in_habits && /^## / { exit }
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in_day && in_habits && /^- \[ \] / {
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sub(/^- \[ \] /, "")
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print
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}
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' "$HABITS_FILE"
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}
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case "${1:-}" in
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open)
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open_habits
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;;
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new)
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new_day
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open_habits
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;;
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left)
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remaining_habits
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;;
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-h|--help|help)
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usage
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;;
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*)
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usage >&2
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exit 1
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;;
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esac
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