Buienalarm in de terminal. Compileer zelf buienalarm van https://github.com/lieuwex/buienalarm

buien

#!/usr/bin/env bash
BARWID=3  # if not 3, make sure the hour ticks alignment matches up
BARHEI=3
BARTOP=24  # ensure this is divisible by $BARHEI

function print_spark() {
	local y=$((BARHEI - 1 - $1))
	local alphabet=" ▁▂▃▄▅▆▇█"
	shift
	for value; do
		value=$(((value - y * BARTOP / BARHEI) * 8 / (BARTOP / BARHEI)))
		[[ $value -lt 0 ]] && value=0
		[[ $value -gt 8 ]] && value=8
		for (( i=0; i<"$BARWID"; i+=1 )); do
			echo -n "${alphabet:$value:1}"
		done
	done
}

function repspace() {
	printf "%${1}s"
}

# Parse flags
fullday=0
location="Den Haag"
while test "$#" -gt 0; do
	if test "$1" = "-24"
		then fullday=1
		else location="$1"
	fi
	shift
done

# Get data
if test "$fullday" -eq 1
	then alarm="$(buienalarm -24 "$location")"
	else alarm="$(buienalarm "$location")"
fi

# Parse data
hours=( $(cut -c 1-5 <<<"$alarm") )
amounts=( $(sed 's/.* \([^m]*\).*/\1/' <<<"$alarm") )
numhours="${#hours[@]}"

if test "$numhours" -lt 2; then
	echo >&2 "No data received from 'buienalarm'"
	exit 1
fi

# Determine ticks and tick spacing
numticks=$(( (numhours + 3) / 6 + 1 ))
ticks=()
tickspaces=()
[[ $numticks -le 1 ]] && divisor=1 || divisor=$((numticks-1))
for (( i=0; i<"$numticks"; i+=1 )); do
	index=$(( (numhours-1) * i / $divisor ))
	[[ $i -eq 0 ]] && previndex=0 || previndex=$(( (numhours-1) * (i-1) / $divisor ))
	ticks[${#ticks[@]}]="${hours[$index]}"
	nsp=$((index - previndex - 1))
	[[ $nsp -lt 0 ]] && nsp=0
	tickspaces[${#tickspaces[@]}]="$nsp"
done

# Build spark graph data
maxval=0
tospark=()
for num in "${amounts[@]}"; do
	[[ $num =~ ([^.]*)\.(.).* ]] && intval="${BASH_REMATCH[1]}${BASH_REMATCH[2]}"
	if [[ "${intval:0:1}" = "0" ]]; then intval="${intval:1}"; fi
	tospark[${#tospark[@]}]="$intval"
	[[ $intval -gt $maxval ]] && maxval="$intval"
done

# Print the lines of the graph
for (( y=0; y<"$BARHEI"; y+=1 )); do
	[[ $y -ne 0 ]] && echo
	echo -n '│'
	print_spark $y "${tospark[@]}"
	echo -n '│'
done

# Print maximum tag after lowest line of spark graph
echo " (max $(bc <<<"scale=1; $maxval / 10" | sed 's/^\./0./')mm/h)"

# Print tick lines
echo -n ' '
for (( i=0; i<"$numticks"; i+=1 )); do
	repspace "$((BARWID * tickspaces[$i]))"
	echo -n ' | '
done
echo

# Print tick labels
for (( i=0; i<"$numticks"; i+=1 )); do
	[[ "${tickspaces[$i]}" -ne 0 ]] && repspace "$((BARWID * tickspaces[$i] - 2))"
	echo -n "${ticks[$i]}"
done
echo