handle action.yml without node

Fixes #732

fixtures/action.yml/not-node/action.yml

@@ -0,0 +1,19 @@
+name: Elixir Script
+author: Jon Lauridsen
+description: Run simple Elixir scripts
+branding:
+  color: orange
+  icon: code
+inputs:
+  script:
+    description: The script to run
+    required: true
+  debug:
+    description: Whether to tell the GitHub client to log details of its requests. true or false. Default is to run in debug mode when the GitHub Actions step debug logging is turned on.
+    default: ${{ runner.debug == '1' }}
+outputs:
+  result:
+    description: The stringified return value of the script
+runs:
+  using: docker
+  image: Dockerfile

src/utils/devenv.test.ts

@@ -98,6 +98,9 @@ Deno.test("devenv.ts", async runner => {
     await runner.step("empty action.yml has no deps", async () => {
       const { pkgs } = await specimen(fixturesd.join("action.yml/empty"))
       assertEquals(pkgs.length, 0)
+
+      const { pkgs: pkgs2 } = await specimen(fixturesd.join("action.yml/not-node"))
+      assertEquals(pkgs2.length, 0)
     })
 
     await runner.step("no dir error", async () => {

src/utils/devenv.ts

@@ -155,11 +155,11 @@ export default async function(dir: Path) {
   async function github_actions(path: Path) {
     const yaml = await path.readYAML()
     if (!isPlainObject(yaml)) return
-    const [,v] = yaml.runs?.using.match(/node(\d+)/)
-    if (v) {
+    const rv = yaml.runs?.using?.match(/node(\d+)/)
+    if (rv?.[1]) {
       pkgs.push({
         project: "nodejs.org",
-        constraint: new semver.Range(`^${v}`)
+        constraint: new semver.Range(`^${rv?.[1]}`)
       })
     }
     await parse_well_formatted_node(yaml.tea)