Filter set of possible Action inputs to those from a particular job

This better handles cases where customers have a monorepo and have
separate jobs for different components.

src/workflow.test.ts

@@ -537,7 +537,8 @@ test("getCategoryInputOrThrow returns category for simple workflow with category
               - uses: github/codeql-action/analyze@v2
                 with:
                   category: some-category
-    `) as Workflow,
+      `) as Workflow,
+      "analysis",
       {}
     ),
     "some-category"
@@ -555,13 +556,45 @@ test("getCategoryInputOrThrow returns undefined for simple workflow without cate
               - uses: actions/checkout@v2
               - uses: github/codeql-action/init@v2
               - uses: github/codeql-action/analyze@v2
-    `) as Workflow,
+      `) as Workflow,
+      "analysis",
       {}
     ),
     undefined
   );
 });
 
+test("getCategoryInputOrThrow returns category for workflow with multiple jobs", (t) => {
+  t.is(
+    getCategoryInputOrThrow(
+      yaml.load(`
+        jobs:
+          foo:
+            runs-on: ubuntu-latest
+            steps:
+              - uses: actions/checkout@v2
+              - uses: github/codeql-action/init@v2
+              - runs: ./build foo
+              - uses: github/codeql-action/analyze@v2
+                with:
+                  category: foo-category
+          bar:
+            runs-on: ubuntu-latest
+            steps:
+              - uses: actions/checkout@v2
+              - uses: github/codeql-action/init@v2
+              - runs: ./build bar
+              - uses: github/codeql-action/analyze@v2
+                with:
+                  category: bar-category
+      `) as Workflow,
+      "bar",
+      {}
+    ),
+    "bar-category"
+  );
+});
+
 test("getCategoryInputOrThrow finds category for workflow with language matrix", (t) => {
   t.is(
     getCategoryInputOrThrow(
@@ -580,7 +613,8 @@ test("getCategoryInputOrThrow finds category for workflow with language matrix",
               - uses: github/codeql-action/analyze@v2
                 with:
                   category: "/language:\${{ matrix.language }}"
-    `) as Workflow,
+      `) as Workflow,
+      "analysis",
       { language: "javascript" }
     ),
     "/language:javascript"
@@ -600,7 +634,8 @@ test("getCategoryInputOrThrow throws error for workflow with dynamic category",
                 - uses: github/codeql-action/analyze@v2
                   with:
                     category: "\${{ github.workflow }}"
-    `) as Workflow,
+        `) as Workflow,
+        "analysis",
         {}
       ),
     {
@@ -628,7 +663,8 @@ test("getCategoryInputOrThrow throws error for workflow with multiple categories
                 - uses: github/codeql-action/analyze@v2
                   with:
                     category: another-category
-      `) as Workflow,
+        `) as Workflow,
+        "analysis",
         {}
       ),
     {

src/workflow.ts

@@ -316,6 +316,7 @@ export function getStepsCallingAction(
  */
 function getInputOrThrow(
   workflow: Workflow,
+  jobName: string,
   actionName: string,
   inputName: string,
   matrixVars: { [key: string]: string }
@@ -325,13 +326,14 @@ function getInputOrThrow(
       `Could not get ${inputName} input to ${actionName} since the workflow has no jobs.`
     );
   }
-  const inputs: string[] = Object.values(workflow.jobs)
-    .map((job) =>
-      getStepsCallingAction(job, actionName).map(
-        (step) => step.with?.[inputName]
-      )
-    )
-    .flat()
+  if (!workflow.jobs[jobName]) {
+    throw new Error(
+      `Could not get ${inputName} input to ${actionName} since the workflow has no job named ${jobName}.`
+    );
+  }
+
+  const inputs = getStepsCallingAction(workflow.jobs[jobName], actionName)
+    .map((step) => step.with?.[inputName])
     .filter((input) => input !== undefined)
     .map((input) => input!);
 
@@ -369,10 +371,12 @@ function getInputOrThrow(
  */
 export function getCategoryInputOrThrow(
   workflow: Workflow,
+  jobName: string,
   matrixVars: { [key: string]: string }
 ): string | undefined {
   return getInputOrThrow(
     workflow,
+    jobName,
     "github/codeql-action/analyze",
     "category",
     matrixVars