ci: color scheme GHA uploads to mirror (#9925)

This changes our GHA that updates our color schemes to also upload it to
our dependency mirror at the same time. This prevents issues where the
upstream disappears, which we've had many times.

.github/workflows/update-colorschemes.yml

@@ -37,16 +37,33 @@ jobs:
           name: ghostty
           authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
 
-      - name: Run zig fetch
-        id: zig_fetch
+      - name: Download colorschemes
+        id: download
         env:
           GH_TOKEN: ${{ github.token }}
         run: |
           # Get the latest release from iTerm2-Color-Schemes
           RELEASE_INFO=$(gh api repos/mbadolato/iTerm2-Color-Schemes/releases/latest)
           TAG_NAME=$(echo "$RELEASE_INFO" | jq -r '.tag_name')
-          nix develop -c zig fetch --save="iterm2_themes" "https://github.com/mbadolato/iTerm2-Color-Schemes/releases/download/${TAG_NAME}/ghostty-themes.tgz"
+          FILENAME="ghostty-themes-${TAG_NAME}.tgz"
+          mkdir -p upload
+          curl -L -o "upload/${FILENAME}" "https://github.com/mbadolato/iTerm2-Color-Schemes/releases/download/${TAG_NAME}/ghostty-themes.tgz"
           echo "tag_name=$TAG_NAME" >> $GITHUB_OUTPUT
+          echo "filename=$FILENAME" >> $GITHUB_OUTPUT
+
+      - name: Upload to R2
+        uses: ryand56/r2-upload-action@b801a390acbdeb034c5e684ff5e1361c06639e7c # v1.4
+        with:
+          r2-account-id: ${{ secrets.CF_R2_DEPS_ACCOUNT_ID }}
+          r2-access-key-id: ${{ secrets.CF_R2_DEPS_AWS_KEY }}
+          r2-secret-access-key: ${{ secrets.CF_R2_DEPS_SECRET_KEY }}
+          r2-bucket: ghostty-deps
+          source-dir: upload
+          destination-dir: ./
+
+      - name: Run zig fetch
+        run: |
+          nix develop -c zig fetch --save="iterm2_themes" "https://deps.files.ghostty.org/${{ steps.download.outputs.filename }}"
 
       - name: Update zig cache hash
         run: |
@@ -75,5 +92,5 @@ jobs:
             build.zig.zon.json
             flatpak/zig-packages.json
           body: |
-            Upstream release: https://github.com/mbadolato/iTerm2-Color-Schemes/releases/tag/${{ steps.zig_fetch.outputs.tag_name }}
+            Upstream release: https://github.com/mbadolato/iTerm2-Color-Schemes/releases/tag/${{ steps.download.outputs.tag_name }}
           labels: dependencies