feat: gemini cli module (#246)

Closes #237
/claim #237

## Description

~https://www.loom.com/share/5b099c73935f4f87b8fdafe1509bb79d?sid=7fea43d6-86e9-45ae-9892-efeb3c820b82~
Updated:
https://www.loom.com/share/62e907eae8544d8cbbe560d7f63bd02d?sid=201212fa-eb58-44b5-8706-8bf9c2c37433
<!-- Briefly describe what this PR does and why -->

## Type of Change

- [x] New module
- [ ] Bug fix
- [ ] Feature/enhancement
- [ ] Documentation
- [ ] Other

## Module Information

<!-- Delete this section if not applicable -->

**Path:** `registry/coder-labs/modules/gemini`  
**New version:** `v1.0.0`  
**Breaking change:** [ ] Yes [ ] No

## Testing & Validation

- [x] Tests pass (`bun test`)
- [x] Code formatted (`bun run fmt`)
- [x] Changes tested locally

## Related Issues

<!-- Link related issues or write "None" if not applicable -->

---------

Co-authored-by: Atif Ali <me@matifali.dev>
Co-authored-by: Hugo Dutka <dutkahugo@gmail.com>
Co-authored-by: DevCats <christofer@coder.com>

.icons/gemini.svg

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+<svg height="1em" style="flex:none;line-height:1" viewBox="0 0 24 24" width="1em" xmlns="http://www.w3.org/2000/svg"><title>Gemini</title><path d="M20.616 10.835a14.147 14.147 0 01-4.45-3.001 14.111 14.111 0 01-3.678-6.452.503.503 0 00-.975 0 14.134 14.134 0 01-3.679 6.452 14.155 14.155 0 01-4.45 3.001c-.65.28-1.318.505-2.002.678a.502.502 0 000 .975c.684.172 1.35.397 2.002.677a14.147 14.147 0 014.45 3.001 14.112 14.112 0 013.679 6.453.502.502 0 00.975 0c.172-.685.397-1.351.677-2.003a14.145 14.145 0 013.001-4.45 14.113 14.113 0 016.453-3.678.503.503 0 000-.975 13.245 13.245 0 01-2.003-.678z" fill="#3186FF"></path><path d="M20.616 10.835a14.147 14.147 0 01-4.45-3.001 14.111 14.111 0 01-3.678-6.452.503.503 0 00-.975 0 14.134 14.134 0 01-3.679 6.452 14.155 14.155 0 01-4.45 3.001c-.65.28-1.318.505-2.002.678a.502.502 0 000 .975c.684.172 1.35.397 2.002.677a14.147 14.147 0 014.45 3.001 14.112 14.112 0 013.679 6.453.502.502 0 00.975 0c.172-.685.397-1.351.677-2.003a14.145 14.145 0 013.001-4.45 14.113 14.113 0 016.453-3.678.503.503 0 000-.975 13.245 13.245 0 01-2.003-.678z" fill="url(#lobe-icons-gemini-fill-0)"></path><path d="M20.616 10.835a14.147 14.147 0 01-4.45-3.001 14.111 14.111 0 01-3.678-6.452.503.503 0 00-.975 0 14.134 14.134 0 01-3.679 6.452 14.155 14.155 0 01-4.45 3.001c-.65.28-1.318.505-2.002.678a.502.502 0 000 .975c.684.172 1.35.397 2.002.677a14.147 14.147 0 014.45 3.001 14.112 14.112 0 013.679 6.453.502.502 0 00.975 0c.172-.685.397-1.351.677-2.003a14.145 14.145 0 013.001-4.45 14.113 14.113 0 016.453-3.678.503.503 0 000-.975 13.245 13.245 0 01-2.003-.678z" fill="url(#lobe-icons-gemini-fill-1)"></path><path d="M20.616 10.835a14.147 14.147 0 01-4.45-3.001 14.111 14.111 0 01-3.678-6.452.503.503 0 00-.975 0 14.134 14.134 0 01-3.679 6.452 14.155 14.155 0 01-4.45 3.001c-.65.28-1.318.505-2.002.678a.502.502 0 000 .975c.684.172 1.35.397 2.002.677a14.147 14.147 0 014.45 3.001 14.112 14.112 0 013.679 6.453.502.502 0 00.975 0c.172-.685.397-1.351.677-2.003a14.145 14.145 0 013.001-4.45 14.113 14.113 0 016.453-3.678.503.503 0 000-.975 13.245 13.245 0 01-2.003-.678z" fill="url(#lobe-icons-gemini-fill-2)"></path><defs><linearGradient gradientUnits="userSpaceOnUse" id="lobe-icons-gemini-fill-0" x1="7" x2="11" y1="15.5" y2="12"><stop stop-color="#08B962"></stop><stop offset="1" stop-color="#08B962" stop-opacity="0"></stop></linearGradient><linearGradient gradientUnits="userSpaceOnUse" id="lobe-icons-gemini-fill-1" x1="8" x2="11.5" y1="5.5" y2="11"><stop stop-color="#F94543"></stop><stop offset="1" stop-color="#F94543" stop-opacity="0"></stop></linearGradient><linearGradient gradientUnits="userSpaceOnUse" id="lobe-icons-gemini-fill-2" x1="3.5" x2="17.5" y1="13.5" y2="12"><stop stop-color="#FABC12"></stop><stop offset=".46" stop-color="#FABC12" stop-opacity="0"></stop></linearGradient></defs></svg>

registry/coder-labs/modules/gemini/README.md

@@ -0,0 +1,78 @@
+---
+display_name: Gemini CLI
+icon: ../../../../.icons/gemini.svg
+description: Run Gemini CLI in your workspace with AgentAPI integration
+verified: true
+tags: [agent, gemini, ai, google, tasks]
+---
+
+# Gemini CLI
+
+Run [Gemini CLI](https://ai.google.dev/gemini-api/docs/cli) in your workspace to access Google's Gemini AI models, and custom pre/post install scripts. This module integrates with [AgentAPI](https://github.com/coder/agentapi) for Coder Tasks compatibility.
+
+```tf
+module "gemini" {
+  source           = "registry.coder.com/coder-labs/gemini/coder"
+  version          = "1.0.0"
+  agent_id         = coder_agent.example.id
+  gemini_api_key   = var.gemini_api_key
+  gemini_model     = "gemini-2.5-pro"
+  install_gemini   = true
+  gemini_version   = "latest"
+  agentapi_version = "latest"
+}
+```
+
+## Prerequisites
+
+- You must add the [Coder Login](https://registry.coder.com/modules/coder-login/coder) module to your template
+- Node.js and npm will be installed automatically if not present
+
+## Usage Example
+
+- Example 1:
+
+```tf
+variable "gemini_api_key" {
+  type        = string
+  description = "Gemini API key"
+  sensitive   = true
+}
+
+module "gemini" {
+  count                     = data.coder_workspace.me.start_count
+  source                    = "registry.coder.com/coder-labs/gemini/coder"
+  version                   = "1.0.0"
+  agent_id                  = coder_agent.example.id
+  gemini_api_key            = var.gemini_api_key # we recommend providing this parameter inorder to have a smoother experience (i.e. no google sign-in)
+  gemini_model              = "gemini-2.5-flash"
+  install_gemini            = true
+  gemini_version            = "latest"
+  gemini_instruction_prompt = "Start every response with `Gemini says:`"
+}
+```
+
+## How it Works
+
+- **Install**: The module installs Gemini CLI using npm (installs Node.js via NVM if needed)
+- **Instruction Prompt**: If `GEMINI_INSTRUCTION_PROMPT` and `GEMINI_START_DIRECTORY` are set, creates the directory (if needed) and writes the prompt to `GEMINI.md`
+- **Start**: Launches Gemini CLI in the specified directory, wrapped by AgentAPI
+- **Environment**: Sets `GEMINI_API_KEY`, `GOOGLE_GENAI_USE_VERTEXAI`, `GEMINI_MODEL` for the CLI (if variables provided)
+
+## Troubleshooting
+
+- If Gemini CLI is not found, ensure `install_gemini = true` and your API key is valid
+- Node.js and npm are installed automatically if missing (using NVM)
+- Check logs in `/home/coder/.gemini-module/` for install/start output
+- We highly recommend using the `gemini_api_key` variable, this also ensures smooth tasks running without needing to sign in to Google.
+
+> [!IMPORTANT]
+> To use tasks with Gemini CLI, ensure you have the `gemini_api_key` variable set, and **you pass the `AI Prompt` Parameter**.
+> By default we inject the "theme": "Default" and "selectedAuthType": "gemini-api-key" to your ~/.gemini/settings.json along with the coder mcp server.
+> In `gemini_instruction_prompt` and `AI Prompt` text we recommend using (\`\`) backticks instead of quotes to avoid escaping issues. Eg: gemini_instruction_prompt = "Start every response with \`Gemini says:\` "
+
+## References
+
+- [Gemini CLI Documentation](https://ai.google.dev/gemini-api/docs/cli)
+- [AgentAPI Documentation](https://github.com/coder/agentapi)
+- [Coder AI Agents Guide](https://coder.com/docs/tutorials/ai-agents)

registry/coder-labs/modules/gemini/main.test.ts

@@ -0,0 +1,207 @@
+import {
+  test,
+  afterEach,
+  describe,
+  setDefaultTimeout,
+  beforeAll,
+  expect,
+} from "bun:test";
+import { execContainer, readFileContainer, runTerraformInit } from "~test";
+import {
+  loadTestFile,
+  writeExecutable,
+  setup as setupUtil,
+  execModuleScript,
+  expectAgentAPIStarted,
+} from "../../../coder/modules/agentapi/test-util";
+
+let cleanupFunctions: (() => Promise<void>)[] = [];
+const registerCleanup = (cleanup: () => Promise<void>) => {
+  cleanupFunctions.push(cleanup);
+};
+afterEach(async () => {
+  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;
+  skipGeminiMock?: boolean;
+  moduleVariables?: Record<string, string>;
+  agentapiMockScript?: string;
+}
+
+const setup = async (props?: SetupProps): Promise<{ id: string }> => {
+  const projectDir = "/home/coder/project";
+  const { id } = await setupUtil({
+    moduleDir: import.meta.dir,
+    moduleVariables: {
+      install_gemini: props?.skipGeminiMock ? "true" : "false",
+      install_agentapi: props?.skipAgentAPIMock ? "true" : "false",
+      gemini_model: "test-model",
+      ...props?.moduleVariables,
+    },
+    registerCleanup,
+    projectDir,
+    skipAgentAPIMock: props?.skipAgentAPIMock,
+    agentapiMockScript: props?.agentapiMockScript,
+  });
+  if (!props?.skipGeminiMock) {
+    await writeExecutable({
+      containerId: id,
+      filePath: "/usr/bin/gemini",
+      content: await loadTestFile(import.meta.dir, "gemini-mock.sh"),
+    });
+  }
+  return { id };
+};
+
+setDefaultTimeout(60 * 1000);
+
+describe("gemini", async () => {
+  beforeAll(async () => {
+    await runTerraformInit(import.meta.dir);
+  });
+
+  test("happy-path", async () => {
+    const { id } = await setup();
+    await execModuleScript(id);
+    await expectAgentAPIStarted(id);
+  });
+
+  test("install-gemini-version", async () => {
+    const version_to_install = "0.1.13";
+    const { id } = await setup({
+      skipGeminiMock: true,
+      moduleVariables: {
+        install_gemini: "true",
+        gemini_version: version_to_install,
+      },
+    });
+    await execModuleScript(id);
+    const resp = await execContainer(id, [
+      "bash",
+      "-c",
+      `cat /home/coder/.gemini-module/install.log || true`,
+    ]);
+    expect(resp.stdout).toContain(version_to_install);
+  });
+
+  test("gemini-settings-json", async () => {
+    const settings = '{"foo": "bar"}';
+    const { id } = await setup({
+      moduleVariables: {
+        gemini_settings_json: settings,
+      },
+    });
+    await execModuleScript(id);
+    const resp = await readFileContainer(id, "/home/coder/.gemini/settings.json");
+    expect(resp).toContain("foo");
+    expect(resp).toContain("bar");
+  });
+
+  test("gemini-api-key", async () => {
+    const apiKey = "test-api-key-123";
+    const { id } = await setup({
+      moduleVariables: {
+        gemini_api_key: apiKey,
+      },
+    });
+    await execModuleScript(id);
+
+    const resp = await readFileContainer(id, "/home/coder/.gemini-module/agentapi-start.log");
+    expect(resp).toContain("gemini_api_key provided !");
+  });
+
+  test("use-vertexai", async () => {
+    const { id } = await setup({
+      skipGeminiMock: false,
+      moduleVariables: {
+        use_vertexai: "true",
+      },
+    });
+    await execModuleScript(id);
+    const resp = await readFileContainer(id, "/home/coder/.gemini-module/install.log");
+    expect(resp).toContain('GOOGLE_GENAI_USE_VERTEXAI=\'true\'');
+  });
+
+  test("gemini-model", async () => {
+    const model = "gemini-2.5-pro";
+    const { id } = await setup({
+      skipGeminiMock: false,
+      moduleVariables: {
+        gemini_model: model,
+      },
+    });
+    await execModuleScript(id);
+    const resp = await readFileContainer(id, "/home/coder/.gemini-module/install.log");
+    expect(resp).toContain(model);
+  });
+
+  test("pre-post-install-scripts", async () => {
+    const { id } = await setup({
+      moduleVariables: {
+        pre_install_script: "#!/bin/bash\necho 'pre-install-script'",
+        post_install_script: "#!/bin/bash\necho 'post-install-script'",
+      },
+    });
+    await execModuleScript(id);
+    const preInstallLog = await readFileContainer(id, "/home/coder/.gemini-module/pre_install.log");
+    expect(preInstallLog).toContain("pre-install-script");
+    const postInstallLog = await readFileContainer(id, "/home/coder/.gemini-module/post_install.log");
+    expect(postInstallLog).toContain("post-install-script");
+  });
+
+  test("folder-variable", async () => {
+    const folder = "/tmp/gemini-test-folder";
+    const { id } = await setup({
+      skipGeminiMock: false,
+      moduleVariables: {
+        folder,
+      },
+    });
+    await execModuleScript(id);
+    const resp = await readFileContainer(id, "/home/coder/.gemini-module/install.log");
+    expect(resp).toContain(folder);
+  });
+
+  test("additional-extensions", async () => {
+    const additional = '{"custom": {"enabled": true}}';
+    const { id } = await setup({
+      moduleVariables: {
+        additional_extensions: additional,
+      },
+    });
+    await execModuleScript(id);
+    const resp = await readFileContainer(id, "/home/coder/.gemini/settings.json");
+    expect(resp).toContain("custom");
+    expect(resp).toContain("enabled");
+  });
+
+  test("gemini-system-prompt", async () => {
+    const prompt = "This is a system prompt for Gemini.";
+    const { id } = await setup({
+      moduleVariables: {
+        gemini_system_prompt: prompt,
+      },
+    });
+    await execModuleScript(id);
+    const resp = await readFileContainer(id, "/home/coder/GEMINI.md");
+    expect(resp).toContain(prompt);
+  });
+
+  test("start-without-prompt", async () => {
+    const { id } = await setup();
+    await execModuleScript(id);
+    const prompt = await execContainer(id, ["ls", "-l", "/home/coder/GEMINI.md"]);
+    expect(prompt.exitCode).not.toBe(0);
+    expect(prompt.stderr).toContain("No such file or directory");
+  });
+});

registry/coder-labs/modules/gemini/main.tf

@@ -0,0 +1,215 @@
+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 "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 "group" {
+  type        = string
+  description = "The name of a group that this app belongs to."
+  default     = null
+}
+
+variable "icon" {
+  type        = string
+  description = "The icon to use for the app."
+  default     = "/icon/gemini.svg"
+}
+
+variable "folder" {
+  type        = string
+  description = "The folder to run Gemini in."
+  default     = "/home/coder"
+}
+
+variable "install_gemini" {
+  type        = bool
+  description = "Whether to install Gemini."
+  default     = true
+}
+
+variable "gemini_version" {
+  type        = string
+  description = "The version of Gemini to install."
+  default     = ""
+}
+
+variable "gemini_settings_json" {
+  type        = string
+  description = "json to use in ~/.gemini/settings.json."
+  default     = ""
+}
+
+variable "gemini_api_key" {
+  type        = string
+  description = "Gemini API Key"
+  default     = ""
+}
+
+variable "use_vertexai" {
+  type        = bool
+  description = "Whether to use vertex ai"
+  default     = false
+}
+
+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     = "v0.3.0"
+}
+
+variable "gemini_model" {
+  type        = string
+  description = "The model to use for Gemini (e.g., gemini-2.5-pro)."
+  default     = ""
+}
+
+variable "pre_install_script" {
+  type        = string
+  description = "Custom script to run before installing Gemini."
+  default     = null
+}
+
+variable "post_install_script" {
+  type        = string
+  description = "Custom script to run after installing Gemini."
+  default     = null
+}
+
+data "coder_parameter" "ai_prompt" {
+  type        = "string"
+  name        = "AI Prompt"
+  default     = ""
+  description = "Initial prompt for the Gemini CLI"
+  mutable     = true
+}
+
+variable "additional_extensions" {
+  type        = string
+  description = "Additional extensions configuration in json format to append to the config."
+  default     = null
+}
+
+variable "gemini_system_prompt" {
+  type        = string
+  description = "System prompt for Gemini. It will be added to GEMINI.md in the specified folder."
+  default     = ""
+}
+
+resource "coder_env" "gemini_api_key" {
+  agent_id = var.agent_id
+  name     = "GEMINI_API_KEY"
+  value    = var.gemini_api_key
+}
+
+resource "coder_env" "gemini_use_vertex_ai" {
+  agent_id = var.agent_id
+  name     = "GOOGLE_GENAI_USE_VERTEXAI"
+  value    = var.use_vertexai
+}
+
+locals {
+  base_extensions = <<-EOT
+{
+  "coder": {
+    "args": [
+      "exp",
+      "mcp",
+      "server"
+    ],
+    "command": "coder",
+    "description": "Report ALL tasks and statuses (in progress, done, failed) you are working on.",
+    "enabled": true,
+    "env": {
+      "CODER_MCP_APP_STATUS_SLUG": "${local.app_slug}",
+      "CODER_MCP_AI_AGENTAPI_URL": "http://localhost:3284"
+    },
+    "name": "Coder",
+    "timeout": 3000,
+    "type": "stdio",
+    "trust": true
+  }
+}
+EOT
+
+  app_slug        = "gemini"
+  install_script  = file("${path.module}/scripts/install.sh")
+  start_script    = file("${path.module}/scripts/start.sh")
+  module_dir_name = ".gemini-module"
+}
+
+module "agentapi" {
+  source  = "registry.coder.com/coder/agentapi/coder"
+  version = "1.0.0"
+
+  agent_id             = var.agent_id
+  web_app_slug         = local.app_slug
+  web_app_order        = var.order
+  web_app_group        = var.group
+  web_app_icon         = var.icon
+  web_app_display_name = "Gemini"
+  cli_app_slug         = "${local.app_slug}-cli"
+  cli_app_display_name = "Gemini CLI"
+  module_dir_name      = local.module_dir_name
+  install_agentapi     = var.install_agentapi
+  agentapi_version     = var.agentapi_version
+  pre_install_script   = var.pre_install_script
+  post_install_script  = var.post_install_script
+  start_script         = <<-EOT
+     #!/bin/bash
+     set -o errexit
+     set -o pipefail
+
+     echo -n '${base64encode(local.start_script)}' | base64 -d > /tmp/start.sh
+     chmod +x /tmp/start.sh
+     GEMINI_API_KEY='${var.gemini_api_key}' \
+     GOOGLE_GENAI_USE_VERTEXAI='${var.use_vertexai}' \
+     GEMINI_MODEL='${var.gemini_model}' \
+     GEMINI_START_DIRECTORY='${var.folder}' \
+     GEMINI_TASK_PROMPT='${base64encode(data.coder_parameter.ai_prompt.value)}' \
+     /tmp/start.sh
+   EOT
+
+  install_script = <<-EOT
+    #!/bin/bash
+    set -o errexit
+    set -o pipefail
+
+    echo -n '${base64encode(local.install_script)}' | base64 -d > /tmp/install.sh
+    chmod +x /tmp/install.sh
+    ARG_INSTALL='${var.install_gemini}' \
+    ARG_GEMINI_VERSION='${var.gemini_version}' \
+    ARG_GEMINI_CONFIG='${base64encode(var.gemini_settings_json)}' \
+    BASE_EXTENSIONS='${base64encode(replace(local.base_extensions, "'", "'\\''"))}' \
+    ADDITIONAL_EXTENSIONS='${base64encode(replace(var.additional_extensions != null ? var.additional_extensions : "", "'", "'\\''"))}' \
+    GEMINI_START_DIRECTORY='${var.folder}' \
+    GEMINI_INSTRUCTION_PROMPT='${base64encode(var.gemini_system_prompt)}' \
+    /tmp/install.sh
+  EOT
+}

registry/coder-labs/modules/gemini/scripts/install.sh

@@ -0,0 +1,175 @@
+#!/bin/bash
+
+BOLD='\033[0;1m'
+
+# Function to check if a command exists
+command_exists() {
+    command -v "$1" >/dev/null 2>&1
+}
+
+set -o nounset
+
+ARG_GEMINI_CONFIG=$(echo -n "$ARG_GEMINI_CONFIG" | base64 -d)
+BASE_EXTENSIONS=$(echo -n "$BASE_EXTENSIONS" | base64 -d)
+ADDITIONAL_EXTENSIONS=$(echo -n "$ADDITIONAL_EXTENSIONS" | base64 -d)
+GEMINI_INSTRUCTION_PROMPT=$(echo -n "$GEMINI_INSTRUCTION_PROMPT" | base64 -d)
+
+echo "--------------------------------"
+printf "gemini_config: %s\n" "$ARG_GEMINI_CONFIG"
+printf "install: %s\n" "$ARG_INSTALL"
+printf "gemini_version: %s\n" "$ARG_GEMINI_VERSION"
+echo "--------------------------------"
+
+set +o nounset
+
+function install_node() {
+  # borrowed from claude-code module
+    if ! command_exists npm; then
+      printf "npm not found, checking for Node.js installation...\n"
+      if ! command_exists node; then
+        printf "Node.js not found, installing Node.js via NVM...\n"
+        export NVM_DIR="$HOME/.nvm"
+        if [ ! -d "$NVM_DIR" ]; then
+          mkdir -p "$NVM_DIR"
+          curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.7/install.sh | bash
+          [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"
+        else
+          [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"
+        fi
+
+        nvm install --lts
+        nvm use --lts
+        nvm alias default node
+
+        printf "Node.js installed: %s\n" "$(node --version)"
+        printf "npm installed: %s\n" "$(npm --version)"
+      else
+        printf "Node.js is installed but npm is not available. Please install npm manually.\n"
+        exit 1
+      fi
+    fi
+}
+
+function install_gemini() {
+  if [ "${ARG_INSTALL}" = "true" ]; then
+    # we need node to install and run gemini-cli
+    install_node
+
+  # If nvm does not exist, we will create a global npm directory (this os to prevent the possibility of EACCESS issues on npm -g)
+  if ! command_exists nvm; then
+      printf "which node: %s\n" "$(which node)"
+      printf "which npm: %s\n" "$(which npm)"
+
+      # Create a directory for global packages
+      mkdir -p "$HOME"/.npm-global
+
+      # Configure npm to use it
+      npm config set prefix "$HOME/.npm-global"
+
+      # Add to PATH for current session
+      export PATH="$HOME/.npm-global/bin:$PATH"
+
+      # Add to shell profile for future sessions
+      if ! grep -q "export PATH=$HOME/.npm-global/bin:\$PATH" ~/.bashrc; then
+          echo "export PATH=$HOME/.npm-global/bin:\$PATH" >> ~/.bashrc
+      fi
+    fi
+
+    printf "%s Installing Gemini CLI\n" "${BOLD}"
+
+    if [ -n "$ARG_GEMINI_VERSION" ]; then
+      npm install -g "@google/gemini-cli@$ARG_GEMINI_VERSION"
+    else
+      npm install -g "@google/gemini-cli"
+    fi
+    printf "%s Successfully installed Gemini CLI. Version: %s\n" "${BOLD}" "$(gemini --version)"
+  fi
+}
+
+function populate_settings_json() {
+    if [ "${ARG_GEMINI_CONFIG}" != "" ]; then
+      SETTINGS_PATH="$HOME/.gemini/settings.json"
+      mkdir -p "$(dirname "$SETTINGS_PATH")"
+      printf "Custom gemini_config is provided !\n"
+      echo "${ARG_GEMINI_CONFIG}" > "$HOME/.gemini/settings.json"
+    else
+      printf "No custom gemini_config provided, using default settings.json.\n"
+      append_extensions_to_settings_json
+    fi
+}
+
+function append_extensions_to_settings_json() {
+    SETTINGS_PATH="$HOME/.gemini/settings.json"
+    mkdir -p "$(dirname "$SETTINGS_PATH")"
+    printf "[append_extensions_to_settings_json] Starting extension merge process...\n"
+    if [ -z "${BASE_EXTENSIONS:-}" ]; then
+      printf "[append_extensions_to_settings_json] BASE_EXTENSIONS is empty, skipping merge.\n"
+      return
+    fi
+    if [ ! -f "$SETTINGS_PATH" ]; then
+      printf "%s does not exist. Creating with merged mcpServers structure.\n" "$SETTINGS_PATH"
+      # If ADDITIONAL_EXTENSIONS is not set or empty, use '{}'
+      ADD_EXT_JSON='{}'
+      if [ -n "${ADDITIONAL_EXTENSIONS:-}" ]; then
+        ADD_EXT_JSON="$ADDITIONAL_EXTENSIONS"
+      fi
+      printf '{"mcpServers":%s}\n' "$(jq -s 'add' <(echo "$BASE_EXTENSIONS") <(echo "$ADD_EXT_JSON"))" > "$SETTINGS_PATH"
+    fi
+
+    # Prepare temp files
+    TMP_SETTINGS=$(mktemp)
+
+    # If ADDITIONAL_EXTENSIONS is not set or empty, use '{}'
+    ADD_EXT_JSON='{}'
+    if [ -n "${ADDITIONAL_EXTENSIONS:-}" ]; then
+      printf "[append_extensions_to_settings_json] ADDITIONAL_EXTENSIONS is set.\n"
+      ADD_EXT_JSON="$ADDITIONAL_EXTENSIONS"
+    else
+      printf "[append_extensions_to_settings_json] ADDITIONAL_EXTENSIONS is empty or not set.\n"
+    fi
+
+    printf "[append_extensions_to_settings_json] Merging BASE_EXTENSIONS and ADDITIONAL_EXTENSIONS into mcpServers...\n"
+    jq --argjson base "$BASE_EXTENSIONS" --argjson add "$ADD_EXT_JSON" \
+      '.mcpServers = (.mcpServers // {} + $base + $add)' \
+      "$SETTINGS_PATH" > "$TMP_SETTINGS" && mv "$TMP_SETTINGS" "$SETTINGS_PATH"
+
+    # Add theme and selectedAuthType fields
+    jq '.theme = "Default" | .selectedAuthType = "gemini-api-key"' "$SETTINGS_PATH" > "$TMP_SETTINGS" && mv "$TMP_SETTINGS" "$SETTINGS_PATH"
+
+    printf "[append_extensions_to_settings_json] Merge complete.\n"
+}
+
+function add_instruction_prompt_if_exists() {
+    if [ -n "${GEMINI_INSTRUCTION_PROMPT:-}" ]; then
+        if [ -d "${GEMINI_START_DIRECTORY}" ]; then
+            printf "Directory '%s' exists. Changing to it.\\n" "${GEMINI_START_DIRECTORY}"
+            cd "${GEMINI_START_DIRECTORY}" || {
+                printf "Error: Could not change to directory '%s'.\\n" "${GEMINI_START_DIRECTORY}"
+                exit 1
+            }
+        else
+            printf "Directory '%s' does not exist. Creating and changing to it.\\n" "${GEMINI_START_DIRECTORY}"
+            mkdir -p "${GEMINI_START_DIRECTORY}" || {
+                printf "Error: Could not create directory '%s'.\\n" "${GEMINI_START_DIRECTORY}"
+                exit 1
+            }
+            cd "${GEMINI_START_DIRECTORY}" || {
+                printf "Error: Could not change to directory '%s'.\\n" "${GEMINI_START_DIRECTORY}"
+                exit 1
+            }
+        fi
+        touch GEMINI.md
+        printf "Setting GEMINI.md\n"
+        echo "${GEMINI_INSTRUCTION_PROMPT}" > GEMINI.md
+    else
+        printf "GEMINI.md is not set.\n"
+    fi
+}
+
+
+# Install Gemini
+install_gemini
+gemini --version
+populate_settings_json
+add_instruction_prompt_if_exists
+

registry/coder-labs/modules/gemini/scripts/start.sh

@@ -0,0 +1,62 @@
+#!/bin/bash
+
+# Load shell environment
+source "$HOME"/.bashrc
+
+command_exists() {
+    command -v "$1" >/dev/null 2>&1
+}
+
+if [ -f "$HOME/.nvm/nvm.sh" ]; then
+  source "$HOME"/.nvm/nvm.sh
+else
+  export PATH="$HOME/.npm-global/bin:$PATH"
+fi
+
+printf "Version: %s\n" "$(gemini --version)"
+
+GEMINI_TASK_PROMPT=$(echo -n "$GEMINI_TASK_PROMPT" | base64 -d)
+
+if command_exists gemini; then
+    printf "Gemini is installed\n"
+else
+    printf "Error: Gemini is not installed. Please enable install_gemini or install it manually :)\n"
+    exit 1
+fi
+
+if [ -d "${GEMINI_START_DIRECTORY}" ]; then
+    printf "Directory '%s' exists. Changing to it.\\n" "${GEMINI_START_DIRECTORY}"
+    cd "${GEMINI_START_DIRECTORY}" || {
+        printf "Error: Could not change to directory '%s'.\\n" "${GEMINI_START_DIRECTORY}"
+        exit 1
+    }
+else
+    printf "Directory '%s' does not exist. Creating and changing to it.\\n" "${GEMINI_START_DIRECTORY}"
+    mkdir -p "${GEMINI_START_DIRECTORY}" || {
+        printf "Error: Could not create directory '%s'.\\n" "${GEMINI_START_DIRECTORY}"
+        exit 1
+    }
+    cd "${GEMINI_START_DIRECTORY}" || {
+        printf "Error: Could not change to directory '%s'.\\n" "${GEMINI_START_DIRECTORY}"
+        exit 1
+    }
+fi
+
+if [ -n "$GEMINI_TASK_PROMPT" ]; then
+    printf "Running the task prompt %s\n" "$GEMINI_TASK_PROMPT"
+    PROMPT="Every step of the way, report tasks to Coder with proper descriptions and statuses. Your task at hand: $GEMINI_TASK_PROMPT"
+    GEMINI_ARGS=(--prompt-interactive "$PROMPT")
+else
+    printf "No task prompt given.\n"
+    GEMINI_ARGS=()
+fi
+
+if [ -n "$GEMINI_API_KEY" ]; then
+    printf "gemini_api_key provided !\n"
+else
+    printf "gemini_api_key not provided\n"
+fi
+
+# use low width to fit in the tasks UI sidebar. height is adjusted so that width x height ~= 80x1000 characters
+# are visible in the terminal screen by default.
+agentapi server --term-width 67 --term-height 1190 -- gemini "${GEMINI_ARGS[@]}"

registry/coder-labs/modules/gemini/testdata/gemini-mock.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+if [[ "$1" == "--version" ]]; then
+  echo "HELLO: $(bash -c env)"
+  echo "gemini version v2.5.0"
+  exit 0
+fi
+
+set -e
+
+while true; do
+    echo "$(date) - gemini-mock"
+    sleep 15
+done