[Unit]
Description=Build and display wallpaper
PartOf=graphical-session.target

[Service]
Environment=WALLPAPER_DIRECTORY=%h/.config/i3/wallpapers
Environment=WALLPAPER_OUTPUT=%h/.cache/i3/current-wallpaper.png
ExecStart=/usr/bin/mkdir -p %h/.cache/i3
ExecStart=%h/.config/i3/bin/wallpaper --directory $WALLPAPER_DIRECTORY \
                                      --target $WALLPAPER_OUTPUT
ExecStart=/usr/bin/hsetroot -root -center $WALLPAPER_OUTPUT
Type=oneshot
RemainAfterExit=false