Fix command execution to support shell features like deno task

lib/core/runner.ts

@@ -157,7 +157,12 @@ class Runner extends BaseRunner {
    * @returns The command to be executed.
    */
   private prepareCommand(env?: Record<string, string | undefined>) {
-    let child = $.raw`${this.processConfig.cmd!}`.stdout("piped").stderr("piped")
+    // Execute command through a shell to handle complex commands like "deno task",
+    // pipes, redirects, and other shell features
+    const shell = CurrentOS === OperatingSystem.Windows ? "cmd" : "sh"
+    const shellArg = CurrentOS === OperatingSystem.Windows ? "/c" : "-c"
+
+    let child = $`${shell} ${shellArg} ${this.processConfig.cmd!}`.stdout("piped").stderr("piped")
 
     if (this.processConfig.cwd) child = child.cwd(this.processConfig.cwd)
     if (env) child = child.env(env)

lib/test/core/test-data/deno-task-test/deno.json

@@ -0,0 +1,5 @@
+{
+  "tasks": {
+    "hello": "deno run hello.ts"
+  }
+}

lib/test/core/test-data/deno-task-test/hello.ts

@@ -0,0 +1 @@
+console.log("hello-from-deno-task")

test/core/runner.test.ts

@@ -70,3 +70,35 @@ test("Runner handles commands with pipes and redirects", async () => {
   // Stop and cleanup
   await pup.terminate(2500)
 })
+
+test("Runner executes actual 'deno task' commands correctly (issue #55)", async () => {
+  const TEST_PROCESS_ID = "test-actual-deno-task"
+  const TEST_PROCESS_COMMAND = "deno task hello"
+  const TEST_CWD = new URL("../../lib/test/core/test-data/deno-task-test/", import.meta.url).pathname
+
+  const config: Configuration = {
+    processes: [
+      {
+        "id": TEST_PROCESS_ID,
+        "cmd": TEST_PROCESS_COMMAND,
+        "cwd": TEST_CWD,
+      },
+    ],
+  }
+  const pup = new Pup(config)
+  await pup.init()
+
+  // Find process
+  const testProcess = pup.processes.findLast((p) => p.getConfig().id === TEST_PROCESS_ID)
+  assertEquals(testProcess !== undefined, true)
+
+  // Start process
+  const startResult = pup.start(TEST_PROCESS_ID, "test")
+  assertEquals(startResult, true)
+
+  // Wait a moment for process to complete
+  await new Promise((resolve) => setTimeout(resolve, 1000))
+
+  // Stop and cleanup
+  await pup.terminate(2500)
+})