feat: add the agentapi module (#177)

The agentapi module is a building block for modules that need to run an
agentapi server. It's not meant for end users of Coder.

The agentapi-specific logic is mostly extracted from [the claude-code
module](c0f2d945c5/registry/coder/modules/claude-code).
You can see this module in action in [the goose 2.0
PR](https://github.com/coder/registry/pull/178).

registry/coder/modules/agentapi/README.md

@@ -0,0 +1,54 @@
+---
+display_name: AgentAPI
+description: Building block for modules that need to run an agentapi server
+icon: ../../../../.icons/coder.svg
+maintainer_github: coder
+verified: true
+tags: [internal]
+---
+
+# AgentAPI
+
+The AgentAPI module is a building block for modules that need to run an agentapi server. It is intended primarily for internal use by Coder to create modules compatible with Tasks.
+
+We do not recommend using this module directly. Instead, please consider using one of our [Tasks-compatible AI agent modules](https://registry.coder.com/modules?search=tag%3Atasks).
+
+```tf
+module "agentapi" {
+  source  = "registry.coder.com/coder/agentapi/coder"
+  version = "1.0.0"
+
+  agent_id             = var.agent_id
+  web_app_slug         = local.app_slug
+  web_app_order        = var.order
+  web_app_group        = var.group
+  web_app_icon         = var.icon
+  web_app_display_name = "Goose"
+  cli_app_slug         = "goose-cli"
+  cli_app_display_name = "Goose CLI"
+  module_dir_name      = local.module_dir_name
+  install_agentapi     = var.install_agentapi
+  pre_install_script   = var.pre_install_script
+  post_install_script  = var.post_install_script
+  start_script         = local.start_script
+  install_script       = <<-EOT
+    #!/bin/bash
+    set -o errexit
+    set -o pipefail
+
+    echo -n '${base64encode(local.install_script)}' | base64 -d > /tmp/install.sh
+    chmod +x /tmp/install.sh
+
+    ARG_PROVIDER='${var.goose_provider}' \
+    ARG_MODEL='${var.goose_model}' \
+    ARG_GOOSE_CONFIG="$(echo -n '${base64encode(local.combined_extensions)}' | base64 -d)" \
+    ARG_INSTALL='${var.install_goose}' \
+    ARG_GOOSE_VERSION='${var.goose_version}' \
+    /tmp/install.sh
+  EOT
+}
+```
+
+## For module developers
+
+For a complete example of how to use this module, see the [goose module](https://github.com/coder/registry/blob/main/registry/coder/modules/goose/main.tf).

registry/coder/modules/agentapi/main.test.ts

@@ -0,0 +1,151 @@
+import {
+  test,
+  afterEach,
+  expect,
+  describe,
+  setDefaultTimeout,
+  beforeAll,
+} from "bun:test";
+import { execContainer, readFileContainer, runTerraformInit } from "~test";
+import {
+  loadTestFile,
+  writeExecutable,
+  setup as setupUtil,
+  execModuleScript,
+  expectAgentAPIStarted,
+} from "./test-util";
+
+let cleanupFunctions: (() => Promise<void>)[] = [];
+
+const registerCleanup = (cleanup: () => Promise<void>) => {
+  cleanupFunctions.push(cleanup);
+};
+
+// Cleanup logic depends on the fact that bun's built-in test runner
+// runs tests sequentially.
+// https://bun.sh/docs/test/discovery#execution-order
+// Weird things would happen if tried to run tests in parallel.
+// One test could clean up resources that another test was still using.
+afterEach(async () => {
+  // reverse the cleanup functions so that they are run in the correct order
+  const cleanupFnsCopy = cleanupFunctions.slice().reverse();
+  cleanupFunctions = [];
+  for (const cleanup of cleanupFnsCopy) {
+    try {
+      await cleanup();
+    } catch (error) {
+      console.error("Error during cleanup:", error);
+    }
+  }
+});
+
+interface SetupProps {
+  skipAgentAPIMock?: boolean;
+  moduleVariables?: Record<string, string>;
+}
+
+const moduleDirName = ".agentapi-module";
+
+const setup = async (props?: SetupProps): Promise<{ id: string }> => {
+  const projectDir = "/home/coder/project";
+  const { id } = await setupUtil({
+    moduleVariables: {
+      experiment_report_tasks: "true",
+      install_agentapi: props?.skipAgentAPIMock ? "true" : "false",
+      web_app_display_name: "AgentAPI Web",
+      web_app_slug: "agentapi-web",
+      web_app_icon: "/icon/coder.svg",
+      cli_app_display_name: "AgentAPI CLI",
+      cli_app_slug: "agentapi-cli",
+      agentapi_version: "latest",
+      module_dir_name: moduleDirName,
+      start_script: await loadTestFile(import.meta.dir, "agentapi-start.sh"),
+      folder: projectDir,
+      ...props?.moduleVariables,
+    },
+    registerCleanup,
+    projectDir,
+    skipAgentAPIMock: props?.skipAgentAPIMock,
+    moduleDir: import.meta.dir,
+  });
+  await writeExecutable({
+    containerId: id,
+    filePath: "/usr/bin/aiagent",
+    content: await loadTestFile(import.meta.dir, "ai-agent-mock.js"),
+  });
+  return { id };
+};
+
+// increase the default timeout to 60 seconds
+setDefaultTimeout(60 * 1000);
+
+// we don't run these tests in CI because they take too long and make network
+// calls. they are dedicated for local development.
+describe("agentapi", async () => {
+  beforeAll(async () => {
+    await runTerraformInit(import.meta.dir);
+  });
+
+  test("happy-path", async () => {
+    const { id } = await setup();
+
+    await execModuleScript(id);
+
+    await expectAgentAPIStarted(id);
+  });
+
+  test("custom-port", async () => {
+    const { id } = await setup({
+      moduleVariables: {
+        agentapi_port: "3827",
+      },
+    });
+    await execModuleScript(id);
+    await expectAgentAPIStarted(id, 3827);
+  });
+
+  test("pre-post-install-scripts", async () => {
+    const { id } = await setup({
+      moduleVariables: {
+        pre_install_script: `#!/bin/bash\necho "pre-install"`,
+        install_script: `#!/bin/bash\necho "install"`,
+        post_install_script: `#!/bin/bash\necho "post-install"`,
+      },
+    });
+
+    await execModuleScript(id);
+    await expectAgentAPIStarted(id);
+
+    const preInstallLog = await readFileContainer(
+      id,
+      `/home/coder/${moduleDirName}/pre_install.log`,
+    );
+    const installLog = await readFileContainer(
+      id,
+      `/home/coder/${moduleDirName}/install.log`,
+    );
+    const postInstallLog = await readFileContainer(
+      id,
+      `/home/coder/${moduleDirName}/post_install.log`,
+    );
+
+    expect(preInstallLog).toContain("pre-install");
+    expect(installLog).toContain("install");
+    expect(postInstallLog).toContain("post-install");
+  });
+
+  test("install-agentapi", async () => {
+    const { id } = await setup({ skipAgentAPIMock: true });
+
+    const respModuleScript = await execModuleScript(id);
+    expect(respModuleScript.exitCode).toBe(0);
+
+    await expectAgentAPIStarted(id);
+    const respAgentAPI = await execContainer(id, [
+      "bash",
+      "-c",
+      "agentapi --version",
+    ]);
+    expect(respAgentAPI.exitCode).toBe(0);
+  });
+});

registry/coder/modules/agentapi/main.tf

@@ -0,0 +1,213 @@
+terraform {
+  required_version = ">= 1.0"
+
+  required_providers {
+    coder = {
+      source  = "coder/coder"
+      version = ">= 2.7"
+    }
+  }
+}
+
+variable "agent_id" {
+  type        = string
+  description = "The ID of a Coder agent."
+}
+
+data "coder_workspace" "me" {}
+
+data "coder_workspace_owner" "me" {}
+
+variable "web_app_order" {
+  type        = number
+  description = "The order determines the position of app in the UI presentation. The lowest order is shown first and apps with equal order are sorted by name (ascending order)."
+  default     = null
+}
+
+variable "web_app_group" {
+  type        = string
+  description = "The name of a group that this app belongs to."
+  default     = null
+}
+
+variable "web_app_icon" {
+  type        = string
+  description = "The icon to use for the app."
+}
+
+variable "web_app_display_name" {
+  type        = string
+  description = "The display name of the web app."
+}
+
+variable "web_app_slug" {
+  type        = string
+  description = "The slug of the web app."
+}
+
+variable "folder" {
+  type        = string
+  description = "The folder to run AgentAPI in."
+  default     = "/home/coder"
+}
+
+variable "cli_app" {
+  type        = bool
+  description = "Whether to create the CLI workspace app."
+  default     = false
+}
+
+variable "cli_app_order" {
+  type        = number
+  description = "The order of the CLI workspace app."
+  default     = null
+}
+
+variable "cli_app_group" {
+  type        = string
+  description = "The group of the CLI workspace app."
+  default     = null
+}
+
+variable "cli_app_icon" {
+  type        = string
+  description = "The icon to use for the app."
+  default     = "/icon/claude.svg"
+}
+
+variable "cli_app_display_name" {
+  type        = string
+  description = "The display name of the CLI workspace app."
+}
+
+variable "cli_app_slug" {
+  type        = string
+  description = "The slug of the CLI workspace app."
+}
+
+variable "pre_install_script" {
+  type        = string
+  description = "Custom script to run before installing the agent used by AgentAPI."
+  default     = null
+}
+
+variable "install_script" {
+  type        = string
+  description = "Script to install the agent used by AgentAPI."
+  default     = ""
+}
+
+variable "post_install_script" {
+  type        = string
+  description = "Custom script to run after installing the agent used by AgentAPI."
+  default     = null
+}
+
+variable "start_script" {
+  type        = string
+  description = "Script that starts AgentAPI."
+}
+
+variable "install_agentapi" {
+  type        = bool
+  description = "Whether to install AgentAPI."
+  default     = true
+}
+
+variable "agentapi_version" {
+  type        = string
+  description = "The version of AgentAPI to install."
+  default     = "v0.2.3"
+}
+
+variable "agentapi_port" {
+  type        = number
+  description = "The port used by AgentAPI."
+  default     = 3284
+}
+
+variable "module_dir_name" {
+  type        = string
+  description = "Name of the subdirectory in the home directory for module files."
+}
+
+
+locals {
+  # we always trim the slash for consistency
+  workdir                            = trimsuffix(var.folder, "/")
+  encoded_pre_install_script         = var.pre_install_script != null ? base64encode(var.pre_install_script) : ""
+  encoded_install_script             = var.install_script != null ? base64encode(var.install_script) : ""
+  encoded_post_install_script        = var.post_install_script != null ? base64encode(var.post_install_script) : ""
+  agentapi_start_script_b64          = base64encode(var.start_script)
+  agentapi_wait_for_start_script_b64 = base64encode(file("${path.module}/scripts/agentapi-wait-for-start.sh"))
+  main_script                        = file("${path.module}/scripts/main.sh")
+}
+
+resource "coder_script" "agentapi" {
+  agent_id     = var.agent_id
+  display_name = "Install and start AgentAPI"
+  icon         = var.web_app_icon
+  script       = <<-EOT
+    #!/bin/bash
+    set -o errexit
+    set -o pipefail
+
+    echo -n '${base64encode(local.main_script)}' | base64 -d > /tmp/main.sh
+    chmod +x /tmp/main.sh
+
+    ARG_MODULE_DIR_NAME='${var.module_dir_name}' \
+    ARG_WORKDIR="$(echo -n '${base64encode(local.workdir)}' | base64 -d)" \
+    ARG_PRE_INSTALL_SCRIPT="$(echo -n '${local.encoded_pre_install_script}' | base64 -d)" \
+    ARG_INSTALL_SCRIPT="$(echo -n '${local.encoded_install_script}' | base64 -d)" \
+    ARG_INSTALL_AGENTAPI='${var.install_agentapi}' \
+    ARG_AGENTAPI_VERSION='${var.agentapi_version}' \
+    ARG_START_SCRIPT="$(echo -n '${local.agentapi_start_script_b64}' | base64 -d)" \
+    ARG_WAIT_FOR_START_SCRIPT="$(echo -n '${local.agentapi_wait_for_start_script_b64}' | base64 -d)" \
+    ARG_POST_INSTALL_SCRIPT="$(echo -n '${local.encoded_post_install_script}' | base64 -d)" \
+    ARG_AGENTAPI_PORT='${var.agentapi_port}' \
+    /tmp/main.sh
+    EOT
+  run_on_start = true
+}
+
+resource "coder_app" "agentapi_web" {
+  slug         = var.web_app_slug
+  display_name = var.web_app_display_name
+  agent_id     = var.agent_id
+  url          = "http://localhost:${var.agentapi_port}/"
+  icon         = var.web_app_icon
+  order        = var.web_app_order
+  group        = var.web_app_group
+  subdomain    = true
+  healthcheck {
+    url       = "http://localhost:${var.agentapi_port}/status"
+    interval  = 3
+    threshold = 20
+  }
+}
+
+resource "coder_app" "agentapi_cli" {
+  count = var.cli_app ? 1 : 0
+
+  slug         = var.cli_app_slug
+  display_name = var.cli_app_display_name
+  agent_id     = var.agent_id
+  command      = <<-EOT
+    #!/bin/bash
+    set -e
+
+    export LANG=en_US.UTF-8
+    export LC_ALL=en_US.UTF-8
+
+    agentapi attach
+    EOT
+  icon         = var.cli_app_icon
+  order        = var.cli_app_order
+  group        = var.cli_app_group
+}
+
+resource "coder_ai_task" "agentapi" {
+  sidebar_app {
+    id = coder_app.agentapi_web.id
+  }
+}

registry/coder/modules/agentapi/scripts/agentapi-wait-for-start.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+set -o errexit
+set -o pipefail
+
+port=${1:-3284}
+
+# This script waits for the agentapi server to start on port 3284.
+# It considers the server started after 3 consecutive successful responses.
+
+agentapi_started=false
+
+echo "Waiting for agentapi server to start on port $port..."
+for i in $(seq 1 150); do
+    for j in $(seq 1 3); do
+        sleep 0.1
+        if curl -fs -o /dev/null "http://localhost:$port/status"; then
+            echo "agentapi response received ($j/3)"
+        else
+            echo "agentapi server not responding ($i/15)"
+            continue 2
+        fi
+    done
+    agentapi_started=true
+    break
+done
+
+if [ "$agentapi_started" != "true" ]; then
+    echo "Error: agentapi server did not start on port $port after 15 seconds."
+    exit 1
+fi
+
+echo "agentapi server started on port $port."

registry/coder/modules/agentapi/scripts/main.sh

@@ -0,0 +1,96 @@
+#!/bin/bash
+set -e
+set -x
+
+set -o nounset
+MODULE_DIR_NAME="$ARG_MODULE_DIR_NAME"
+WORKDIR="$ARG_WORKDIR"
+PRE_INSTALL_SCRIPT="$ARG_PRE_INSTALL_SCRIPT"
+INSTALL_SCRIPT="$ARG_INSTALL_SCRIPT"
+INSTALL_AGENTAPI="$ARG_INSTALL_AGENTAPI"
+AGENTAPI_VERSION="$ARG_AGENTAPI_VERSION"
+START_SCRIPT="$ARG_START_SCRIPT"
+WAIT_FOR_START_SCRIPT="$ARG_WAIT_FOR_START_SCRIPT"
+POST_INSTALL_SCRIPT="$ARG_POST_INSTALL_SCRIPT"
+AGENTAPI_PORT="$ARG_AGENTAPI_PORT"
+set +o nounset
+
+command_exists() {
+    command -v "$1" >/dev/null 2>&1
+}
+
+module_path="$HOME/${MODULE_DIR_NAME}"
+mkdir -p "$module_path/scripts"
+
+if [ ! -d "${WORKDIR}" ]; then
+    echo "Warning: The specified folder '${WORKDIR}' does not exist."
+    echo "Creating the folder..."
+    mkdir -p "${WORKDIR}"
+    echo "Folder created successfully."
+fi
+if [ -n "${PRE_INSTALL_SCRIPT}" ]; then
+    echo "Running pre-install script..."
+    echo -n "${PRE_INSTALL_SCRIPT}" >"$module_path/pre_install.sh"
+    chmod +x "$module_path/pre_install.sh"
+    "$module_path/pre_install.sh" 2>&1 | tee "$module_path/pre_install.log"
+fi
+
+echo "Running install script..."
+echo -n "${INSTALL_SCRIPT}" >"$module_path/install.sh"
+chmod +x "$module_path/install.sh"
+"$module_path/install.sh" 2>&1 | tee "$module_path/install.log"
+
+# Install AgentAPI if enabled
+if [ "${INSTALL_AGENTAPI}" = "true" ]; then
+    echo "Installing AgentAPI..."
+    arch=$(uname -m)
+    if [ "$arch" = "x86_64" ]; then
+        binary_name="agentapi-linux-amd64"
+    elif [ "$arch" = "aarch64" ]; then
+        binary_name="agentapi-linux-arm64"
+    else
+        echo "Error: Unsupported architecture: $arch"
+        exit 1
+    fi
+    if [ "${AGENTAPI_VERSION}" = "latest" ]; then
+        # for the latest release the download URL pattern is different than for tagged releases
+        # https://docs.github.com/en/repositories/releasing-projects-on-github/linking-to-releases
+        download_url="https://github.com/coder/agentapi/releases/latest/download/$binary_name"
+    else
+        download_url="https://github.com/coder/agentapi/releases/download/${AGENTAPI_VERSION}/$binary_name"
+    fi
+    curl \
+        --retry 5 \
+        --retry-delay 5 \
+        --fail \
+        --retry-all-errors \
+        -L \
+        -C - \
+        -o agentapi \
+        "$download_url"
+    chmod +x agentapi
+    sudo mv agentapi /usr/local/bin/agentapi
+fi
+if ! command_exists agentapi; then
+    echo "Error: AgentAPI is not installed. Please enable install_agentapi or install it manually."
+    exit 1
+fi
+
+echo -n "${START_SCRIPT}" >"$module_path/scripts/agentapi-start.sh"
+echo -n "${WAIT_FOR_START_SCRIPT}" >"$module_path/scripts/agentapi-wait-for-start.sh"
+chmod +x "$module_path/scripts/agentapi-start.sh"
+chmod +x "$module_path/scripts/agentapi-wait-for-start.sh"
+
+if [ -n "${POST_INSTALL_SCRIPT}" ]; then
+    echo "Running post-install script..."
+    echo -n "${POST_INSTALL_SCRIPT}" >"$module_path/post_install.sh"
+    chmod +x "$module_path/post_install.sh"
+    "$module_path/post_install.sh" 2>&1 | tee "$module_path/post_install.log"
+fi
+
+export LANG=en_US.UTF-8
+export LC_ALL=en_US.UTF-8
+
+cd "${WORKDIR}"
+nohup "$module_path/scripts/agentapi-start.sh" true "${AGENTAPI_PORT}" &>"$module_path/agentapi-start.log" &
+"$module_path/scripts/agentapi-wait-for-start.sh" "${AGENTAPI_PORT}"

registry/coder/modules/agentapi/test-util.ts

@@ -0,0 +1,130 @@
+import {
+  execContainer,
+  findResourceInstance,
+  removeContainer,
+  runContainer,
+  runTerraformApply,
+  writeFileContainer,
+} from "~test";
+import path from "path";
+import { expect } from "bun:test";
+
+export const setupContainer = async ({
+  moduleDir,
+  image,
+  vars,
+}: {
+  moduleDir: string;
+  image?: string;
+  vars?: Record<string, string>;
+}) => {
+  const state = await runTerraformApply(moduleDir, {
+    agent_id: "foo",
+    ...vars,
+  });
+  const coderScript = findResourceInstance(state, "coder_script");
+  const id = await runContainer(image ?? "codercom/enterprise-node:latest");
+  return { id, coderScript, cleanup: () => removeContainer(id) };
+};
+
+export const loadTestFile = async (
+  moduleDir: string,
+  ...relativePath: [string, ...string[]]
+) => {
+  return await Bun.file(
+    path.join(moduleDir, "testdata", ...relativePath),
+  ).text();
+};
+
+export const writeExecutable = async ({
+  containerId,
+  filePath,
+  content,
+}: {
+  containerId: string;
+  filePath: string;
+  content: string;
+}) => {
+  await writeFileContainer(containerId, filePath, content, {
+    user: "root",
+  });
+  await execContainer(
+    containerId,
+    ["bash", "-c", `chmod 755 ${filePath}`],
+    ["--user", "root"],
+  );
+};
+
+interface SetupProps {
+  skipAgentAPIMock?: boolean;
+  moduleDir: string;
+  moduleVariables: Record<string, string>;
+  projectDir?: string;
+  registerCleanup: (cleanup: () => Promise<void>) => void;
+  agentapiMockScript?: string;
+}
+
+export const setup = async (props: SetupProps): Promise<{ id: string }> => {
+  const projectDir = props.projectDir ?? "/home/coder/project";
+  const { id, coderScript, cleanup } = await setupContainer({
+    moduleDir: props.moduleDir,
+    vars: props.moduleVariables,
+  });
+  props.registerCleanup(cleanup);
+  await execContainer(id, ["bash", "-c", `mkdir -p '${projectDir}'`]);
+  if (!props?.skipAgentAPIMock) {
+    await writeExecutable({
+      containerId: id,
+      filePath: "/usr/bin/agentapi",
+      content:
+        props.agentapiMockScript ??
+        (await loadTestFile(import.meta.dir, "agentapi-mock.js")),
+    });
+  }
+  await writeExecutable({
+    containerId: id,
+    filePath: "/home/coder/script.sh",
+    content: coderScript.script,
+  });
+  return { id };
+};
+
+export const expectAgentAPIStarted = async (
+  id: string,
+  port: number = 3284,
+) => {
+  const resp = await execContainer(id, [
+    "bash",
+    "-c",
+    `curl -fs -o /dev/null "http://localhost:${port}/status"`,
+  ]);
+  if (resp.exitCode !== 0) {
+    console.log("agentapi not started");
+    console.log(resp.stdout);
+    console.log(resp.stderr);
+  }
+  expect(resp.exitCode).toBe(0);
+};
+
+export const execModuleScript = async (
+  id: string,
+  env?: Record<string, string>,
+) => {
+  const envArgs = Object.entries(env ?? {})
+    .map(([key, value]) => ["--env", `${key}=${value}`])
+    .flat();
+  const resp = await execContainer(
+    id,
+    [
+      "bash",
+      "-c",
+      `set -o errexit; set -o pipefail; cd /home/coder && ./script.sh 2>&1 | tee /home/coder/script.log`,
+    ],
+    envArgs,
+  );
+  if (resp.exitCode !== 0) {
+    console.log(resp.stdout);
+    console.log(resp.stderr);
+  }
+  return resp;
+};

registry/coder/modules/agentapi/testdata/agentapi-mock.js

@@ -0,0 +1,19 @@
+#!/usr/bin/env node
+
+const http = require("http");
+const args = process.argv.slice(2);
+const portIdx = args.findIndex((arg) => arg === "--port") + 1;
+const port = portIdx ? args[portIdx] : 3284;
+
+console.log(`starting server on port ${port}`);
+
+http
+  .createServer(function (_request, response) {
+    response.writeHead(200);
+    response.end(
+      JSON.stringify({
+        status: "stable",
+      }),
+    );
+  })
+  .listen(port);

registry/coder/modules/agentapi/testdata/agentapi-start.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+set -o errexit
+set -o pipefail
+
+use_prompt=${1:-false}
+port=${2:-3284}
+
+module_path="$HOME/.agentapi-module"
+log_file_path="$module_path/agentapi.log"
+
+echo "using prompt: $use_prompt" >>/home/coder/test-agentapi-start.log
+echo "using port: $port" >>/home/coder/test-agentapi-start.log
+
+agentapi server --port "$port" --term-width 67 --term-height 1190 -- \
+    bash -c aiagent \
+    >"$log_file_path" 2>&1

registry/coder/modules/agentapi/testdata/ai-agent-mock.js

@@ -0,0 +1,9 @@
+#!/usr/bin/env node
+
+const main = async () => {
+  console.log("mocking an ai agent");
+  // sleep for 30 minutes
+  await new Promise((resolve) => setTimeout(resolve, 30 * 60 * 1000));
+};
+
+main();

test/test.ts

@@ -324,3 +324,13 @@ export const writeFileContainer = async (
   }
   expect(proc.exitCode).toBe(0);
 };
+
+export const readFileContainer = async (id: string, path: string) => {
+  const proc = await execContainer(id, ["cat", path], ["--user", "root"]);
+  if (proc.exitCode !== 0) {
+    console.log(proc.stderr);
+    console.log(proc.stdout);
+  }
+  expect(proc.exitCode).toBe(0);
+  return proc.stdout;
+};