build: remove dependency on asset/ directory existence. (#51)

* build: remove dependency on asset/ directory existence.

* docs: add comments explaining why we ignore cp errors

Author: chaosteil

Diff for: .github/workflows/release.yaml

@@ -42,7 +42,7 @@ jobs:
       - name: Prepare package
         run: |
           wasm-bindgen --no-typescript --out-name bevy_game --out-dir wasm --target web target/wasm32-unknown-unknown/release/${{ env.binary }}.wasm
-          cp -r assets wasm/
+          cp -r assets wasm/ || true # Try to copy, but ignore if it can't copy if source directory does not exist 
 
       - name: Package as a zip
         working-directory: ./wasm
@@ -91,7 +91,7 @@ jobs:
         run: |
           mkdir linux
           cp target/x86_64-unknown-linux-gnu/release/${{ env.binary }} linux/
-          cp -r assets linux/
+          cp -r assets linux/ || true # Try to copy, but ignore if it can't copy if source directory does not exist
 
       - name: Package as a zip
         working-directory: ./linux
@@ -137,6 +137,7 @@ jobs:
         run: |
           mkdir windows
           cp target/x86_64-pc-windows-msvc/release/${{ env.binary }}.exe windows/
+          mkdir assets -ea 0 # create the assets directory if it does not exist, it will get ignored in the zip if empty
           cp -r assets windows/
 
       - name: Package as a zip
@@ -186,7 +187,7 @@ jobs:
         run: |
           mkdir -p ${{ env.binary }}.app/Contents/MacOS
           cp target/x86_64-apple-darwin/release/${{ env.binary }} ${{ env.binary }}.app/Contents/MacOS/
-          cp -r assets ${{ env.binary }}.app/Contents/MacOS/
+          cp -r assets ${{ env.binary }}.app/Contents/MacOS/ || true # Try to copy, but ignore if it can't copy if source directory does not exist
           hdiutil create -fs HFS+ -volname "${{ env.binary }}" -srcfolder ${{ env.binary }}.app ${{ env.binary }}-macOS-intel.dmg
 
       - name: Upload binaries to artifacts
@@ -232,7 +233,7 @@ jobs:
         run: |
           mkdir -p ${{ env.binary }}.app/Contents/MacOS
           cp target/aarch64-apple-darwin/release/${{ env.binary }} ${{ env.binary }}.app/Contents/MacOS/
-          cp -r assets ${{ env.binary }}.app/Contents/MacOS/
+          cp -r assets ${{ env.binary }}.app/Contents/MacOS/ || true # Try to copy, but ignore if it can't copy if source directory does not exist
           hdiutil create -fs HFS+ -volname "${{ env.binary }}-macOS-apple-silicon" -srcfolder ${{ env.binary }}.app ${{ env.binary }}-macOS-apple-silicon.dmg
 
       - name: Upload binaries to artifacts

Diff for: README.md

@@ -29,8 +29,8 @@ This workflow runs on every tag.
 
 It will build:
 * For Linux and Windows, a .zip archive containing the executable and the `assets`.
-* For macOS, a dmg image with a .app containing the assets.
-* For wasm, a .zip archive with the wasm binary, the js bindings, an html file loading it, and the assets.
+* For macOS, a dmg image with a .app containing the `assets`.
+* For wasm, a .zip archive with the wasm binary, the js bindings, an html file loading it, and the `assets`.
 
 If you don't want to target some of those platforms, you can remove the corresponding job from the file [release.yaml](./.github/workflows/release.yaml).
 
@@ -67,11 +67,8 @@ If you would like to use the GitHub workflows included here for your own project
 
 1. The release workflow relies on the `index.html` file under `/wasm` for web builds
 2. Make sure that the env variable `binary` ([release.yaml](.github/workflows/release.yaml#L10)) matches the name of your binary
-3. In case your project doesn't have an `assets` folder
-   1. Either create one and put a `.gitkeep` file in it to be able to push it
-   2. Or remove the `cp -r assets` statements in the build jobs
-4. Adapt the used toolchain if you are using nightly
-5. In your GitHub repo's settings, under `Actions -> General` make sure "Read and Write permissions" is selected under "Workflow permissions" near the bottom. This fixes the error `Error: Resource not accessible by integration`.
+3. Adapt the used toolchain if you are using nightly
+4. In your GitHub repo's settings, under `Actions -> General` make sure "Read and Write permissions" is selected under "Workflow permissions" near the bottom. This fixes the error `Error: Resource not accessible by integration`.
 
 
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