feat: add aurora wallpapers

Containerfile

@@ -1,4 +1,51 @@
+FROM docker.io/library/alpine:latest AS builder
+
+RUN apk add curl jq zstd tar
+
+ENV URL="https://api.github.com/repos/ublue-os/artwork/releases"
+
+RUN sh <<'EOF'
+# tagged with date of aurora-wallpaper creation
+set -xeuo pipefail
+TARBALL=$(curl -s ${URL} | jq -r 'first(.[] | .assets[]? | select(.name == "aurora-wallpapers.tar.zstd") .browser_download_url)')
+
+curl -L $TARBALL -o /tmp/aurora-wallpapers.tar.zstd
+EOF
+
+RUN sh <<'EOF'
+mkdir -p /output/
+mkdir -p /tmp/aurora-wallpapers
+tar -xvf /tmp/aurora-wallpapers.tar.zstd -C /tmp/aurora-wallpapers
+
+cd /tmp/aurora-wallpapers
+# We don't need gnome metadata
+rm -rf kde/*/gnome-background-properties/
+
+mkdir -p /output/usr/share/backgrounds
+mkdir -p /output/usr/share/wallpapers
+mv /tmp/aurora-wallpapers/kde/ /output/usr/share/backgrounds/aurora/
+
+# make relative symlinks so wallpapers are actually in
+# /usr/share/backgrounds/aurora/name1 but accessible also accesible
+# in /usr/share/wallpapers/name1
+cd /output/usr/share/backgrounds
+for dir in ../backgrounds/aurora/*; do
+  ln -s "${dir}" ../wallpapers/
+done
+
+# FIXME
+# symlink the deleted AI slop with it's replacement
+#cd /output/usr/share
+#ln -s backgrounds/aurora/aurora-wallpaper-6 ../backgrounds/aurora/aurora-wallpaper-1
+## same reason as above
+#ln -s backgrounds/aurora/aurora-wallpaper-1/ wallpapers/aurora-wallpaper-1
+
+EOF
+
 FROM scratch AS ctx
+
+COPY --from=builder /output/ /wallpapers
+
 COPY /brew /brew
 COPY /flatpaks /flatpaks
 COPY /just /just