39 lines
1.2 KiB
Plaintext
39 lines
1.2 KiB
Plaintext
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#!/usr/bin/env ruby
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require 'fileutils'
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require 'tempfile'
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require 'rss'
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require 'uri'
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require 'net/http'
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IMAGE_DIR = File.expand_path '~/pictures/nasa-iotd'
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FEED_URL = 'http://www.nasa.gov/rss/dyn/lg_image_of_the_day.rss'
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CURRENT_FILE = File.join(IMAGE_DIR, 'current.jpg')
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PREVIOUS_FILE = File.join(IMAGE_DIR, 'previous.jpg')
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WALLPAPER_FILE = File.join(IMAGE_DIR, 'wallpaper.jpg')
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def download url, file
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File.open(file, 'wb') { |f| f.write Net::HTTP.get(URI(url)) }
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`convert #{file} -resize 1920x1080 -gravity center -background black -extent 1920x1080 #{file}`
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end
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FileUtils.mkdir_p(IMAGE_DIR) unless File.directory?(IMAGE_DIR)
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feed = RSS::Parser.parse FEED_URL, false
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today = feed.items.first.enclosure.url.sub('http:', 'https:')
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new = Tempfile.new('nasa-iotd').path
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download today, new
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unless File.exists?(CURRENT_FILE) && FileUtils.cmp(new, CURRENT_FILE)
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FileUtils.mv CURRENT_FILE, PREVIOUS_FILE if File.exist?(CURRENT_FILE)
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FileUtils.mv new, CURRENT_FILE
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end
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download feed.items[1].enclosure.url.sub('http:', 'https:'), PREVIOUS_FILE unless File.exist?(PREVIOUS_FILE)
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`convert #{CURRENT_FILE} #{PREVIOUS_FILE} +append #{WALLPAPER_FILE}`
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`feh --bg-tile #{WALLPAPER_FILE}`
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