Add support against supply attack in Gat

Add support against supply attack in Gat, and output sha ids instead of
`uses` tags.

README.md

@@ -39,7 +39,7 @@ new Workflow("My first workflow")
       },
     ],
   })
-  .compile('my-first-workflow.yml');
+  .compile("my-first-workflow.yml");
 ```
 
 Notice that you need to call the `compile()` method at the end, passing the file name of the generated Github Actions workflow.
@@ -52,12 +52,6 @@ You can build your templates running this command in your root folder:
 npx gat build
 ```
 
-Alternatively you can also compile a single template:
-
-```bash
-npx gat build .github/templates/some-workflow.ts
-```
-
 Following the previous example, you should see now a file `.github/workflows/my-first-workflow.yml` like this:
 
 ```yaml

src/__snapshots__/workflow.spec.ts.snap

@@ -204,7 +204,7 @@ jobs:
     runs-on: ubuntu-22.04
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744
         with:
           ref: main
 "

src/cli.ts

@@ -25,8 +25,8 @@ cli
     await execPromise(
       `npx ts-node ${process.env["GAT_BUILD_FLAGS"] ?? "--swc -T"} ${path.join(
         folder,
-        "index.ts"
-      )}`
+        "index.ts",
+      )}`,
     );
 
     process.exit(0);

src/step.ts

@@ -18,3 +18,7 @@ export interface UseStep extends BaseStep {
   uses: string;
   with?: Record<string, string | number | boolean>;
 }
+
+export const isUseStep = (step: Step): step is UseStep => {
+  return (step as UseStep).uses !== undefined;
+};

src/workflow.spec.ts

@@ -3,7 +3,7 @@ import { RunStep, UseStep } from "./step";
 import { Workflow } from "./workflow";
 
 describe("Workflow", () => {
-  it("generates a simple workflow", () => {
+  it("generates a simple workflow", async () => {
     const workflow = new Workflow("Simple");
     workflow
       .on("pull_request", { types: ["opened"] })
@@ -15,21 +15,21 @@ describe("Workflow", () => {
         dependsOn: ["job1"],
       });
 
-    expect(workflow.compile()).toMatchSnapshot();
+    expect(await workflow.compile()).toMatchSnapshot();
   });
 
-  it("allows multiple events", () => {
+  it("allows multiple events", async () => {
     const workflow = new Workflow("Multiple events");
     workflow
       .on("push", { branches: ["main"] })
       .on("pull_request", { types: ["opened"] })
       .addJob("job1", {
         steps: [{ name: "Do something", run: "exit 0" }],
       });
-    expect(workflow.compile()).toMatchSnapshot();
+    expect(await workflow.compile()).toMatchSnapshot();
   });
 
-  it("allows declaring default options", () => {
+  it("allows declaring default options", async () => {
     const workflow = new Workflow("Default options");
     workflow
       .on("push", { branches: ["main"] })
@@ -39,10 +39,10 @@ describe("Workflow", () => {
       .addJob("job1", {
         steps: [{ name: "Do something", run: "exit 0" }],
       });
-    expect(workflow.compile()).toMatchSnapshot();
+    expect(await workflow.compile()).toMatchSnapshot();
   });
 
-  it("allows declaring environment variables", () => {
+  it("allows declaring environment variables", async () => {
     const workflow = new Workflow("With Environment variables");
     workflow
       .on("push")
@@ -56,10 +56,10 @@ describe("Workflow", () => {
           },
         ],
       });
-    expect(workflow.compile()).toMatchSnapshot();
+    expect(await workflow.compile()).toMatchSnapshot();
   });
 
-  it("allows using a concurrency group", () => {
+  it("allows using a concurrency group", async () => {
     const workflow = new Workflow("Concurrency group");
     workflow.on("push").addJob("job1", {
       concurrency: {
@@ -72,10 +72,10 @@ describe("Workflow", () => {
         },
       ],
     });
-    expect(workflow.compile()).toMatchSnapshot();
+    expect(await workflow.compile()).toMatchSnapshot();
   });
 
-  it("allows using outputs", () => {
+  it("allows using outputs", async () => {
     const workflow = new Workflow("Using outputs");
     workflow.on("push").addJob("job1", {
       steps: [
@@ -88,10 +88,10 @@ describe("Workflow", () => {
         "random-number": "${{ steps.random-number.outputs.random-number }}",
       },
     });
-    expect(workflow.compile()).toMatchSnapshot();
+    expect(await workflow.compile()).toMatchSnapshot();
   });
 
-  it("allows conditional jobs", () => {
+  it("allows conditional jobs", async () => {
     const workflow = new Workflow("Conditional job");
     workflow.on("push").addJob("job1", {
       ifExpression: "${{ github.ref != 'refs/heads/main' }}",
@@ -101,10 +101,10 @@ describe("Workflow", () => {
         },
       ],
     });
-    expect(workflow.compile()).toMatchSnapshot();
+    expect(await workflow.compile()).toMatchSnapshot();
   });
 
-  it("allows a job matrix", () => {
+  it("allows a job matrix", async () => {
     const workflow = new Workflow("Conditional job");
     workflow.on("push").addJob("job1", {
       matrix: {
@@ -132,10 +132,10 @@ describe("Workflow", () => {
         },
       ],
     });
-    expect(workflow.compile()).toMatchSnapshot();
+    expect(await workflow.compile()).toMatchSnapshot();
   });
 
-  it("allows uses steps", () => {
+  it("allows uses steps", async () => {
     const workflow = new Workflow("Uses steps");
     workflow
       .on("push")
@@ -151,10 +151,10 @@ describe("Workflow", () => {
           },
         ],
       });
-    expect(workflow.compile()).toMatchSnapshot();
+    expect(await workflow.compile()).toMatchSnapshot();
   });
 
-  it("allows custom types in a workflow", () => {
+  it("allows custom types in a workflow", async () => {
     interface MyUseStep extends UseStep {
       uses: "custom-action";
       with: { foo: string };
@@ -163,7 +163,7 @@ describe("Workflow", () => {
     type CustomRunner = "standard-runner";
 
     const workflow = new Workflow<CustomStep, CustomRunner>(
-      "With custom types"
+      "With custom types",
     );
 
     workflow.on("push").addJob("job1", {
@@ -181,10 +181,10 @@ describe("Workflow", () => {
       ],
     });
 
-    expect(workflow.compile()).toMatchSnapshot();
+    expect(await workflow.compile()).toMatchSnapshot();
   });
 
-  it("support workflow dispatch event", () => {
+  it("support workflow dispatch event", async () => {
     const workflow = new Workflow("Workflow dispatch");
     workflow
       .on("workflow_dispatch", {
@@ -203,29 +203,29 @@ describe("Workflow", () => {
       .addJob("job1", {
         steps: [{ name: "Do something", run: "exit 0" }],
       });
-    expect(workflow.compile()).toMatchSnapshot();
+    expect(await workflow.compile()).toMatchSnapshot();
   });
 
-  it("supports schedule event", () => {
+  it("supports schedule event", async () => {
     const workflow = new Workflow("Schedule")
       .on("schedule", [{ cron: "0 4 * * 1-5" }])
       .addJob("job1", {
         steps: [{ name: "Do something", run: "exit 0" }],
       });
-    expect(workflow.compile()).toMatchSnapshot();
+    expect(await workflow.compile()).toMatchSnapshot();
   });
 
-  it("supports a pretty name for the job", () => {
+  it("supports a pretty name for the job", async () => {
     const workflow = new Workflow("Job with pretty name")
       .on("push")
       .addJob("job1", {
         prettyName: "My pretty name",
         steps: [{ name: "Do something", run: "exit 0" }],
       });
-    expect(workflow.compile()).toMatchSnapshot();
+    expect(await workflow.compile()).toMatchSnapshot();
   });
 
-  it("allows permissions into jobs", () => {
+  it("allows permissions into jobs", async () => {
     const workflow = new Workflow("Job with permissions")
       .on("push")
       .addJob("job1", {
@@ -235,10 +235,10 @@ describe("Workflow", () => {
         },
         steps: [{ name: "Do something", run: "exit 0" }],
       });
-    expect(workflow.compile()).toMatchSnapshot();
+    expect(await workflow.compile()).toMatchSnapshot();
   });
 
-  it("allows multiline strings", () => {
+  it("allows multiline strings", async () => {
     const workflow = new Workflow("Multiline strings")
       .on("push")
       .addJob("job1", {
@@ -250,10 +250,10 @@ exit 0`,
           },
         ],
       });
-    expect(workflow.compile()).toMatchSnapshot();
+    expect(await workflow.compile()).toMatchSnapshot();
   });
 
-  it("allows concurrency groups at workflow level", () => {
+  it("allows concurrency groups at workflow level", async () => {
     const workflow = new Workflow("Concurrency at workflow level")
       .on("push")
       .setConcurrencyGroup({
@@ -268,6 +268,6 @@ exit 0`,
           },
         ],
       });
-    expect(workflow.compile()).toMatchSnapshot();
+    expect(await workflow.compile()).toMatchSnapshot();
   });
 });