feat: integrate OIDC token exchange in GitHub Action

- Add setupGitHubInstallationToken utility for OIDC token generation
- Implement automatic token exchange with Pullfrog API endpoint
- Add support for multiple authentication methods (input, env, OIDC)
- Create setup utilities for test repository management
- Update action entry point to handle new token flow
- Add environment variable documentation for API key
- Remove large bundled dependencies and optimize build
- Support both development and production token workflows

utils/act.ts

@@ -1,59 +1,36 @@
 import { execSync } from "node:child_process";
-import { existsSync, readFileSync } from "node:fs";
+import { existsSync } from "node:fs";
 import { dirname, join } from "node:path";
 import { fileURLToPath } from "node:url";
-import { config, parse } from "dotenv";
+import { config } from "dotenv";
+import { buildAction, setupTestRepo } from "./setup";
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = dirname(__filename);
 
+// Environment variables that should be passed as secrets to the workflow
+const ENV_VARS = ["ANTHROPIC_API_KEY", "GITHUB_INSTALLATION_TOKEN"];
+
 export function runAct(prompt: string): void {
-  // First, ensure the scratch repo is cloned
   const tempDir = join(__dirname, "..", ".temp");
-
-  // Check if .temp exists and either reset it or clone it
-  if (existsSync(tempDir)) {
-    console.log("📦 Resetting existing .temp repository...");
-    execSync("git reset --hard HEAD && git clean -fd", {
-      cwd: tempDir,
-      stdio: "inherit",
-    });
-  } else {
-    console.log("📦 Cloning pullfrogai/scratch into .temp...");
-    const repoUrl = "git@github.com:pullfrogai/scratch.git";
-    execSync(`git clone ${repoUrl} ${tempDir}`, { stdio: "inherit" });
-  }
-
-  const workflowPath = join(tempDir, ".github", "workflows", "pullfrog.yml");
+  const actionPath = join(__dirname, "..");
   const envPath = join(__dirname, "..", "..", ".env");
 
-  // Load environment variables into process
+  // Setup test repository
+  setupTestRepo({ tempDir });
+
+  // Load environment variables
   config({ path: envPath });
 
-  // Parse environment variables from .env file to get keys
-  let envVars: string[] = [];
-  try {
-    const content = readFileSync(envPath, "utf8");
-    const parsed = parse(content);
-    envVars = Object.keys(parsed);
-  } catch (error) {
-    console.warn(
-      `Warning: Could not read .env file: ${(error as Error).message}`,
-    );
-  }
+  // Build action bundles
+  buildAction(actionPath);
 
-  // Build fresh bundles with esbuild
-  const actionPath = join(__dirname, "..");
-  console.log("🔨 Building fresh bundles with esbuild...");
-  execSync("node esbuild.config.js", {
-    cwd: actionPath,
-    stdio: "inherit",
-  });
+  const workflowPath = join(tempDir, ".github", "workflows", "pullfrog.yml");
 
   // Create minimal dist for act (avoids pnpm symlink issues)
   const distPath = join(actionPath, ".act-dist");
   console.log("📦 Creating minimal distribution for act...");
-  execSync(`rm -rf "${distPath}" && mkdir -p "${distPath}"`, { shell: true });
+  execSync(`rm -rf "${distPath}" && mkdir -p "${distPath}"`, { shell: "/bin/bash" });
 
   // Copy only necessary files (bundled, no node_modules needed)
   ["action.yml", "entry.cjs", "index.cjs", "package.json"].forEach((file) => {
@@ -79,11 +56,15 @@ export function runAct(prompt: string): void {
       `pullfrog/action@v0=${distPath}`, // Use minimal dist without symlinks
     ];
 
-    // Add all environment variables as secrets (without values)
-    envVars.forEach((key) => {
-      actCommandParts.push("-s", key);
+    // Add environment variables as secrets that will be available to the workflow
+    ENV_VARS.forEach((key) => {
+      if (process.env[key]) {
+        actCommandParts.push("-s", key);
+      }
     });
 
+    // We only need the specific ENV_VARS, no need to add other variables
+
     const actCommand = actCommandParts.join(" ");
 
     console.log("🚀 Running act with prompt:");