gpu-dawn: begin publishing prebuilt binaries

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>

gpu-dawn/.github/workflows/ci.yml

@@ -1,9 +1,12 @@
 name: CI
 on:
-  - push
-  - pull_request
+  workflow_run:
+    workflows: ["Draft release"]
+    types:
+      - completed
 jobs:
   x86_64-linux:
+    needs: release-draft
     runs-on: ubuntu-latest
     # We want to run on external PRs, but not on our own internal PRs as they'll be run by the push
     # to the branch.
@@ -17,8 +20,13 @@ jobs:
           sudo sh -c 'wget -c https://ziglang.org/builds/zig-linux-x86_64-0.9.0-dev.2023+16b753549.tar.xz -O - | tar -xJ --strip-components=1 -C /usr/local/bin'
       - name: Clone mach-glfw
         run: rm libs/mach-glfw && git clone https://github.com/hexops/mach-glfw libs/mach-glfw
-      - name: test
-        run: zig build test && find zig-out/
+      - name: install
+        run: zig build install && find zig-out/
+      - name: upload
+        run: |
+          mv zig-out/lib/libdawn.a zig-out/lib/libdawn_x86_64-linux.a
+          gzip -9 zig-out/lib/libdawn_x86_64-linux.a
+          gh release upload $(git rev-parse --short HEAD) zig-out/lib/libdawn_x86_64-linux.a
   # TODO(build-system): enable windows CI here once gpu-dawn builds under Windows
   # x86_64-windows:
   #   runs-on: windows-latest
@@ -36,9 +44,11 @@ jobs:
   #         cd C:\
   #         7z x zig.zip
   #         Add-Content $env:GITHUB_PATH "C:\zig-windows-x86_64-0.9.0-dev.2023+16b753549\"
-  #     - name: test
-  #       run: zig build test && find zig-out/
+  #     - name: install
+  #       run: zig build install && find zig-out/
+  #     # TODO: upload step for Windows
   x86_64-macos:
+    needs: release-draft
     runs-on: macos-latest
     # We want to run on external PRs, but not on our own internal PRs as they'll be run by the push
     # to the branch.
@@ -52,7 +62,12 @@ jobs:
           sudo sh -c 'wget -c https://ziglang.org/builds/zig-macos-x86_64-0.9.0-dev.2023+16b753549.tar.xz -O - | tar -xJ --strip-components=1 -C /usr/local/bin'
       - name: Clone mach-glfw
         run: rm libs/mach-glfw && git clone https://github.com/hexops/mach-glfw libs/mach-glfw
-      - name: test
-        run: zig build test && find zig-out/
+      - name: install
+        run: zig build install && find zig-out/
         env:
           AGREE: true
+      - name: upload
+        run: |
+          mv zig-out/lib/libdawn.a zig-out/lib/libdawn_x86_64-macos.a
+          gzip -9 zig-out/lib/libdawn_x86_64-macos.a
+          gh release upload $(git rev-parse --short HEAD) zig-out/lib/libdawn_x86_64-macos.a