Multi-OS testing for cache usage

Author: svartalf

.github/workflows/ci.yml

@@ -18,7 +18,14 @@ jobs:
       - run: npm run test
 
   install_from_tool_cache:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os:
+          - ubuntu-latest
+          - ubuntu-16.04
+          - macOS-latest
+          - windows-latest
     steps:
       - uses: actions/checkout@v2
       - name: Install sccache

dist/index.js

@@ -33,7 +33,9 @@ function getExt(): string {
 
 async function resolveVersion(crate: string): Promise<string> {
     const url = `https://crates.io/api/v1/crates/${crate}`;
-    const client = new http.HttpClient("@actions-rs (https://github.com/actions-rs/)");
+    const client = new http.HttpClient(
+        "@actions-rs (https://github.com/actions-rs/)"
+    );
 
     const resp: any = await client.getJson(url);
     if (resp.result == null) {
@@ -62,6 +64,8 @@ function buildUrl(crate: string, version: string): string {
     const runner = getRunner();
     const ext = getExt();
 
+    core.debug(`Determined current Actions runner OS: ${runner}`);
+
     return `https://s3.${s3Region}.amazonaws.com/${s3Bucket}/${crate}/${runner}/${crate}-${version}${ext}`;
 }