chore: test natively on Windows (#426)

Previously, parts of the tooling didn't work on Windows, so WSL was used as a
workaround for this use case. Things should work on Windows now, so test running
directly instead of via WSL.

Signed-off-by: Will Murphy <will.murphy@anchore.com>

.github/workflows/test.yml

@@ -30,11 +30,6 @@ jobs:
         os: [ubuntu-latest, windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: Vampire/setup-wsl@v2
-        if: ${{ matrix.os == 'windows-latest' }}
-        with:
-          distribution: Alpine
-
       - uses: actions/checkout@v3
         with:
           path: ./

README.md

@@ -167,15 +167,9 @@ Output parameters:
 
 ## Windows
 
-Windows is currently supported via Windows Subsystem for Linux (WSL). It is
-required to set up a WSL distribution prior to invoking the `sbom-action`, for
-example, you can add the small Alpine image:
-
-```yaml
-- uses: Vampire/setup-wsl@v2
-  with:
-    distribution: Alpine
-```
+This action is tested on Windows, and should work natively on Windows hosts
+without WSL. (Note that it previously required WSL, but should now be run
+natively on Windows.)
 
 ## Diagnostics
 

src/github/Executor.ts

@@ -11,15 +11,7 @@ export async function execute(
   args: string[],
   options?: exec.ExecOptions
 ) {
-  if (process.platform === "win32") {
-    return await exec.exec(
-      "wsl",
-      [mapToWSLPath(cmd), ...args.map(mapToWSLPath)],
-      options
-    );
-  } else {
-    return exec.exec(cmd, args, options);
-  }
+  return exec.exec(cmd, args, options);
 }
 
 /**

src/github/SyftGithubAction.ts

@@ -30,6 +30,8 @@ const PRIOR_ARTIFACT_ENV_VAR = "ANCHORE_SBOM_ACTION_PRIOR_ARTIFACT";
 const tempDir = fs.mkdtempSync(path.join(os.tmpdir(), "sbom-action-"));
 const githubDependencySnapshotFile = `${tempDir}/github.sbom.json`;
 
+const exeSuffix = process.platform == "win32" ? ".exe" : "";
+
 /**
  * Tries to get a unique artifact name or otherwise as appropriate as possible
  */
@@ -205,14 +207,14 @@ export async function downloadSyft(): Promise<string> {
 
   await execute("sh", [installPath, "-d", "-b", syftBinaryPath, version]);
 
-  return `${syftBinaryPath}/${name}`;
+  return path.join(syftBinaryPath, name) + exeSuffix;
 }
 
 /**
  * Gets the Syft command to run via exec
  */
 export async function getSyftCommand(): Promise<string> {
-  const name = SYFT_BINARY_NAME;
+  const name = SYFT_BINARY_NAME + exeSuffix;
   const version = SYFT_VERSION;
 
   const sourceSyft = await downloadSyftFromZip(version);