60 lines
1.7 KiB
Bash
Executable file
60 lines
1.7 KiB
Bash
Executable file
#! /usr/bin/bash
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set -euo pipefail
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IFS=$'\n\t'
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API_KEY="${NASA_API_KEY:-DEMO_KEY}"
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if [ "${API_KEY}" = "DEMO_KEY" ]; then
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echo "No API key set! using demo key."
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fi
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WALLPAPERS="$(systemd-path user)"/Pictures/nasa
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mkdir --parents "${WALLPAPERS}"
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APOD_URL="https://api.nasa.gov/planetary/apod?api_key=${API_KEY}"
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echo "Fetching data from API"
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response="$(curl --silent --write-out '{"rate-limit": %header{x-ratelimit-remaining}}' "${APOD_URL}" | jq --slurp add)"
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echo "Received response from API"
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# shellcheck disable=SC2005
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echo "$(printf '%s' "${response}" | jq '.')"
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echo "Parsing data"
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rate_remaining="$(printf '%s' "${response}" | jq '."rate-limit"')"
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echo "Remaining requests until rate limit: ${rate_remaining}"
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if [ "$(printf '%s' "${response}" | jq 'has("hdurl")')" == "false" ]; then
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echo "Response contains no download URL"
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exit 1
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fi
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picture_date="$(printf '%s' "${response}" | jq --raw-output .date)"
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picture_url="$(printf '%s' "${response}" | jq --raw-output .hdurl)"
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echo "Generating output filename"
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extension="${picture_url##*.}"
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filename="${picture_date}.${extension}"
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outfile="${WALLPAPERS}/${filename}"
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if [ -f "${outfile}" ]; then
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echo "Target file already exists"
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else
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echo "Creating temporary file"
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tempfile="$(mktemp)"
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echo "Fetching the daily picture"
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curl \
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--location \
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--output "${tempfile}" \
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--silent \
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"${picture_url}"
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echo "Transaction-like file update"
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mv "${tempfile}" "${outfile}"
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fi
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echo "Updating the wallpaper image"
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ln \
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--force \
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--symbolic \
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"${outfile}" \
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"${WALLPAPERS}/today"
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echo "Refreshing the desktop background"
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swaymsg output "*" bg "${SWAY_WALLPAPER}" fill
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