feature (jetbrains-plugins): add module for installing jetbrains plugin (#772)

Co-authored-by: DevCats <christofer@coder.com>
Co-authored-by: DevCats <chris@dualriver.com>

Author: Harsh9485

registry/harsh9485/.images/avatar.png

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+---
+display_name: Harsh Singh Panwar
+bio: Open source contributor
+github: Harsh9485
+avatar: ./.images/avatar.png
+status: community
+---
+
+# Harsh Singh Panwar
+
+Community modules for Coder workspaces.

registry/harsh9485/README.md

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+---
+display_name: JetBrains Plugin Installer
+description: Companion module for coder/jetbrains that automatically installs JetBrains Marketplace plugins.
+icon: ../../../../.icons/jetbrains.svg
+tags: [ide, jetbrains, plugins]
+---
+
+# JetBrains Plugin Installer
+
+A companion module for
+[coder/jetbrains](https://registry.coder.com/modules/jetbrains) that
+automatically installs JetBrains Marketplace plugins into your workspace.
+
+Use this alongside the core `coder/jetbrains` module — it handles plugin
+installation while `coder/jetbrains` handles IDE setup and Toolbox
+integration.
+
+```tf
+module "jetbrains_plugins" {
+  count    = data.coder_workspace.me.start_count
+  source   = "registry.coder.com/harsh9485/jetbrains-plugins/coder"
+  version  = "0.1.0"
+  agent_id = coder_agent.main.id
+
+  jetbrains_plugins = {
+    "PY" = ["com.koxudaxi.pydantic", "com.intellij.kubernetes"]
+  }
+}
+```
+
+## Prerequisites
+
+- The [coder/jetbrains](https://registry.coder.com/modules/jetbrains)
+  module (or equivalent JetBrains Toolbox setup) must already be
+  configured in your template.
+- `jq` must be available on `PATH`.
+- Linux environment only.
+
+## Finding Plugin IDs
+
+Open the plugin page on the
+[JetBrains Marketplace](https://plugins.jetbrains.com/). Scroll to
+**Additional Information** and copy the **Plugin ID**.
+
+## Usage
+
+```tf
+module "jetbrains" {
+  count    = data.coder_workspace.me.start_count
+  source   = "registry.coder.com/coder/jetbrains/coder"
+  version  = "1.4.0"
+  agent_id = coder_agent.main.id
+  folder   = "/home/coder/project"
+  default  = ["PY", "GO"]
+}
+
+module "jetbrains_plugins" {
+  count    = data.coder_workspace.me.start_count
+  source   = "registry.coder.com/harsh9485/jetbrains-plugins/coder"
+  version  = "0.1.0"
+  agent_id = coder_agent.main.id
+
+  jetbrains_plugins = {
+    "PY" = ["com.koxudaxi.pydantic", "com.intellij.kubernetes"]
+    "GO" = ["org.jetbrains.plugins.go-template"]
+  }
+}
+```
+
+The keys in `jetbrains_plugins` are IDE product codes (`PY`, `GO`, `IU`,
+etc.) matching the codes used by the `coder/jetbrains` module. Each value
+is a list of Marketplace plugin IDs to install for that IDE.
+
+> [!IMPORTANT]
+> After installing the IDE, restart the workspace. On the next start the
+> module detects installed IDEs and automatically installs the configured
+> plugins.
+
+Some plugins may be disabled by default due to JetBrains security
+defaults — you might need to enable them manually in the IDE.

registry/harsh9485/modules/jetbrains-plugins/README.md

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+run "no_script_when_plugins_empty" {
+  command = plan
+
+  variables {
+    agent_id          = "foo"
+    jetbrains_plugins = {}
+  }
+
+  assert {
+    condition     = length(resource.coder_script.install_jetbrains_plugins) == 0
+    error_message = "Expected no plugin install script when plugins map is empty"
+  }
+}
+
+run "script_created_when_plugins_provided" {
+  command = plan
+
+  variables {
+    agent_id = "foo"
+    jetbrains_plugins = {
+      "PY" = ["com.koxudaxi.pydantic", "com.intellij.kubernetes"]
+    }
+  }
+
+  assert {
+    condition     = length(resource.coder_script.install_jetbrains_plugins) == 1
+    error_message = "Expected script to be created when plugins are provided"
+  }
+}
+
+run "rejects_invalid_product_code" {
+  command = plan
+
+  variables {
+    agent_id = "foo"
+    jetbrains_plugins = {
+      "INVALID" = ["com.example.plugin"]
+    }
+  }
+
+  expect_failures = [
+    var.jetbrains_plugins,
+  ]
+}

registry/harsh9485/modules/jetbrains-plugins/jetbrains-plugins.tftest.hcl

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+terraform {
+  required_version = ">= 1.9"
+
+  required_providers {
+    coder = {
+      source  = "coder/coder"
+      version = ">= 2.5"
+    }
+  }
+}
+
+variable "agent_id" {
+  type        = string
+  description = "The resource ID of a Coder agent."
+}
+
+variable "jetbrains_plugins" {
+  type        = map(list(string))
+  description = "Map of IDE product codes to plugin ID lists. Example: { IU = [\"com.foo\"], GO = [\"org.bar\"] }."
+  default     = {}
+
+  validation {
+    condition = alltrue([
+      for code in keys(var.jetbrains_plugins) : contains(
+        ["CL", "GO", "IU", "PS", "PY", "RD", "RM", "RR", "WS"], code
+      )
+    ])
+    error_message = "Keys must be valid JetBrains product codes: CL, GO, IU, PS, PY, RD, RM, RR, WS."
+  }
+}
+
+locals {
+  plugin_map_b64        = base64encode(jsonencode(var.jetbrains_plugins))
+  plugin_install_script = file("${path.module}/scripts/install_plugins.sh")
+}
+
+resource "coder_script" "install_jetbrains_plugins" {
+  count        = length(var.jetbrains_plugins) > 0 ? 1 : 0
+  agent_id     = var.agent_id
+  display_name = "Install JetBrains Plugins"
+  run_on_start = true
+
+  script = <<-EOT
+    #!/bin/bash
+    set -o errexit
+    set -o pipefail
+
+    CONFIG_DIR="$HOME/.config/JetBrains"
+
+    mkdir -p "$CONFIG_DIR"
+    echo -n "${local.plugin_map_b64}" | base64 -d > "$CONFIG_DIR/plugins.json"
+    chmod 600 "$CONFIG_DIR/plugins.json"
+
+    echo -n '${base64encode(local.plugin_install_script)}' | base64 -d > /tmp/install_plugins.sh
+    chmod +x /tmp/install_plugins.sh
+
+    /tmp/install_plugins.sh
+  EOT
+}