Updated documentation about arduino-cli integration options. (#2605)

* Fixed some examples

* Added example of integration by embedding golang

docs/integration-options.md

@@ -14,9 +14,51 @@ how we designed the software so that it can be effectively leveraged under diffe
 As you might expect, the first way to use the Arduino CLI is from a terminal and by a human, and user experience plays a
 key role here. The UX is under a continuous improvement process as we want the tool to be powerful without being too
 complicated. We heavily rely on sub-commands to provide a rich set of different operations logically grouped together,
-so that users can easily explore the interface while getting very specific contextual help.
+so that users can easily explore the interface while getting very specific contextual help (even in Chinese!).
 
-![contextual help screenshot][]
+```
+$ LANG=zh arduino-cli
+Arduino 命令行界面 (arduino-cli)
+
+用法：
+  arduino-cli [command]
+
+示例：
+  arduino-cli <命令> [参数...]
+
+可用命令：
+  board           Arduino 开发板命令
+  burn-bootloader 上传引导加载程序。
+  cache           Arduino 缓存命令。
+  compile         编译 Arduino 项目
+  completion      已生成脚本
+  config          Arduino 配置命令。
+  core            Arduino 内核操作。
+  daemon          在端口上作为守护进程运行：50051
+  debug           调试 Arduino 项目
+  help            Help about any command
+  lib             Arduino 关于库的命令。
+  monitor         开启开发板的通信端口。
+  outdated        列出可以升级的内核和库
+  sketch          Arduino CLI 项目命令
+  update          更新内核和库的索引
+  upgrade         升级已安装的内核和库。
+  upload          上传 Arduino 项目。
+  version         显示 Arduino CLI 的版本号。
+
+参数：
+      --additional-urls strings   以逗号分隔的开发板管理器附加地址列表。
+      --config-file string        自定义配置文件（如果未指定，将使用默认值）。
+      --format string             日志的输出格​​式，可以是：text, json, jsonmini, yaml (default "text")
+  -h, --help                      help for arduino-cli
+      --log                       在标准输出上打印日志。
+      --log-file string           写入日志的文件的路径。
+      --log-format string         日志的输出格​​式，可以是：text, json
+      --log-level string          记录此级别及以上的消息。有效级别为 trace, debug, info, warn, error, fatal, panic
+      --no-color                  Disable colored output.
+
+使用 "arduino-cli [command] --help" 获取有关命令的更多信息。
+```
 
 ### Console applications for robots
 
@@ -26,18 +68,68 @@ system. There are some niceties to observe when you write software that’s supp
 one in particular is the ability to run without a configuration file. This is possible because every configuration
 option you find in the arduino-cli.yaml configuration file can be provided either through a command line flag or by
 setting an environment variable. To give an example, the following commands are all equivalent and will fetch the
-package index used to work with unstable experimental versions of Arduino's cores:
+external package index for ESP32 platforms:
+
+```
+$ cat ~/.arduino15/arduino-cli.yaml
+board_manager:
+  additional_urls:
+    - https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
+
+$ arduino-cli core update-index
+Downloading index: package_index.tar.bz2 downloaded
+Downloading index: package_esp32_index.json downloaded
+```
 
-![configuration methods screenshot][]
+or:
+
+```
+$ export ARDUINO_BOARD_MANAGER_ADDITIONAL_URLS="https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json"
+$ arduino-cli core update-index
+Downloading index: package_index.tar.bz2 downloaded
+Downloading index: package_esp32_index.json downloaded
+```
+
+or:
+
+```
+$ arduino-cli core update-index --additional-urls="https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json"
+Downloading index: package_index.tar.bz2 downloaded
+Downloading index: package_esp32_index.json downloaded
+```
 
 See the [configuration documentation] for details about Arduino CLI's configuration system.
 
 Consistent with the previous paragraph, when it comes to providing output the Arduino CLI aims to be user friendly but
 also slightly verbose, something that doesn’t play well with robots. This is why we added an option to provide output
-that’s easy to parse. For example, the following figure shows what getting the software version in [JSON] format looks
-like.
+that’s easy to parse. For example, the following figure shows what getting the result in [JSON] format and filtering
+using the `jq` tools may look like:
 
-![JSON output screenshot][]
+```
+$ arduino-cli lib search FlashStorage --format json | jq .libraries[0].latest
+{
+  "author": "Various",
+  "version": "1.0.0",
+  "maintainer": "Arduino <[email protected]>",
+  "sentence": "The FlashStorage library aims to provide a convenient way to store and retrieve user's data using the non-volatile flash memory of microcontrollers.",
+  "paragraph": "Useful if the EEPROM is not available or too small. Currently, ATSAMD21 and ATSAMD51 cpu are supported (and consequently every board based on this cpu like the Arduino Zero or Aduino MKR1000).",
+  "website": "https://github.com/cmaglie/FlashStorage",
+  "category": "Data Storage",
+  "architectures": [
+    "samd"
+  ],
+  "types": [
+    "Contributed"
+  ],
+  "resources": {
+    "url": "https://downloads.arduino.cc/libraries/github.com/cmaglie/FlashStorage-1.0.0.zip",
+    "archive_filename": "FlashStorage-1.0.0.zip",
+    "checksum": "SHA-256:2f5a349e1c5dc4ec7f7e22268c0f998af3f471b98ed873abd6e671ac67940e39",
+    "size": 12265,
+    "cache_path": "libraries"
+  }
+}
+```
 
 Even if not related to software design, one last feature that’s worth mentioning is the availability of a one-line
 [installation script] that can be used to make the latest version of the Arduino CLI available on most systems with an
@@ -53,7 +145,58 @@ of features of the command line interface and waiting for clients to connect and
 following is some [Golang] code capable of retrieving the version number of a remote running Arduino CLI server
 instance:
 
-![gRPC interface screenshot][]
+```go
+// This file is part of arduino-cli.
+//
+// Copyright 2024 ARDUINO SA (http://www.arduino.cc/)
+//
+// This software is released under the GNU General Public License version 3,
+// which covers the main part of arduino-cli.
+// The terms of this license can be found at:
+// https://www.gnu.org/licenses/gpl-3.0.en.html
+//
+// You can be released from the requirements of the above licenses by purchasing
+// a commercial license. Buying such a license is mandatory if you want to
+// modify or otherwise use the software for commercial activities involving the
+// Arduino software without disclosing the source code of your own applications.
+// To purchase a commercial license, send an email to [email protected].
+
+package main
+
+import (
+	"context"
+	"log"
+	"time"
+
+	rpc "github.com/arduino/arduino-cli/rpc/cc/arduino/cli/commands/v1"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
+)
+
+func main() {
+	// Establish a connection with the gRPC server
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	conn, err := grpc.DialContext(ctx, "localhost:50051",
+		grpc.WithTransportCredentials(insecure.NewCredentials()),
+		grpc.WithBlock())
+	cancel()
+	if err != nil {
+		log.Println(err)
+		log.Fatal("error connecting to arduino-cli rpc server, you can start it by running `arduino-cli daemon`")
+	}
+	defer conn.Close()
+
+	// Create an instance of the gRPC clients.
+	cli := rpc.NewArduinoCoreServiceClient(conn)
+
+	// Now we can call various methods of the API...
+	versionResp, err := cli.Version(context.Background(), &rpc.VersionRequest{})
+	if err != nil {
+		log.Fatalf("Error getting version: %s", err)
+	}
+	log.Printf("arduino-cli version: %v", versionResp.GetVersion())
+}
+```
 
 gRPC is language agnostic: even if the example is written in Golang, the programming language used for the client can be
 Python, JavaScript or any of the many [supported ones][grpc supported languages], leading to a variety of possible
@@ -68,13 +211,86 @@ For more information on Arduino CLI's gRPC interface, see the [gRPC interface re
 
 Arduino CLI is written in [Golang] and the code is organized in a way that makes it easy to use it as a library by
 including the modules you need in another Golang application at compile time. Both the first and second pillars rely on
-a common Golang API, a set of functions that abstract all the functionalities offered by the Arduino CLI, so that when
-we provide a fix or a new feature, they are automatically available to both the command line and gRPC interfaces. The
-source modules implementing this API can be imported in other Golang programs to embed a full-fledged Arduino CLI. For
-example, this is how some backend services powering [Arduino Cloud] can compile sketches and manage libraries. Just to
-give you a taste of what it means to embed the Arduino CLI, here is how to search for a core using the API:
+a common Golang API, based on the gRPC protobuf definitions: a set of functions that abstract all the functionalities
+offered by the Arduino CLI, so that when we provide a fix or a new feature, they are automatically available to both the
+command line and gRPC interfaces. The source modules implementing this API are implemented through the `commands`
+package, and it can be imported in other Golang programs to embed a full-fledged Arduino CLI. For example, this is how
+some backend services powering [Arduino Cloud] can compile sketches and manage libraries. Just to give you a taste of
+what it means to embed the Arduino CLI, here is how to search for a core using the API:
+
+```go
+// This file is part of arduino-cli.
+//
+// Copyright 2024 ARDUINO SA (http://www.arduino.cc/)
+//
+// This software is released under the GNU General Public License version 3,
+// which covers the main part of arduino-cli.
+// The terms of this license can be found at:
+// https://www.gnu.org/licenses/gpl-3.0.en.html
+//
+// You can be released from the requirements of the above licenses by purchasing
+// a commercial license. Buying such a license is mandatory if you want to
+// modify or otherwise use the software for commercial activities involving the
+// Arduino software without disclosing the source code of your own applications.
+// To purchase a commercial license, send an email to [email protected].
+
+package main
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"log"
+
+	"github.com/arduino/arduino-cli/commands"
+	rpc "github.com/arduino/arduino-cli/rpc/cc/arduino/cli/commands/v1"
+	"github.com/sirupsen/logrus"
+)
+
+func main() {
+	// Create a new ArduinoCoreServer
+	srv := commands.NewArduinoCoreServer()
+
+	// Disable logging
+	logrus.SetOutput(io.Discard)
+
+	// Create a new instance in the server
+	ctx := context.Background()
+	resp, err := srv.Create(ctx, &rpc.CreateRequest{})
+	if err != nil {
+		log.Fatal("Error creating instance:", err)
+	}
+	instance := resp.GetInstance()
+
+	// Defer the destruction of the instance
+	defer func() {
+		if _, err := srv.Destroy(ctx, &rpc.DestroyRequest{Instance: instance}); err != nil {
+			log.Fatal("Error destroying instance:", err)
+		}
+		fmt.Println("Instance successfully destroyed")
+	}()
+
+	// Initialize the instance
+	initStream := commands.InitStreamResponseToCallbackFunction(ctx, func(r *rpc.InitResponse) error {
+		fmt.Println("INIT> ", r)
+		return nil
+	})
+	if err := srv.Init(&rpc.InitRequest{Instance: instance}, initStream); err != nil {
+		log.Fatal("Error during initialization:", err)
+	}
 
-![Go library interface screenshot][]
+	// Search for platforms and output the result
+	searchResp, err := srv.PlatformSearch(ctx, &rpc.PlatformSearchRequest{Instance: instance})
+	if err != nil {
+		log.Fatal("Error searching for platforms:", err)
+	}
+	for _, platformSummary := range searchResp.GetSearchOutput() {
+		installed := platformSummary.GetInstalledRelease()
+		meta := platformSummary.GetMetadata()
+		fmt.Printf("%30s %8s %s\n", meta.GetId(), installed.GetVersion(), installed.GetName())
+	}
+}
+```
 
 Embedding the Arduino CLI is limited to Golang applications and requires a deep knowledge of its internals. For the
 average use case, the gRPC interface might be a better alternative. Nevertheless, this remains a valid option that we
@@ -106,7 +322,3 @@ tracker] if you’ve got a use case that doesn’t fit one of the three pillars.
 [commands package]: https://github.com/arduino/arduino-cli/tree/master/commands
 [issue tracker]: https://github.com/arduino/arduino-cli/issues
 [contextual help screenshot]: img/CLI_contextual_help_screenshot.png
-[configuration methods screenshot]: img/CLI_configuration_methods_screenshot.png
-[json output screenshot]: img/CLI_JSON_output_screenshot.png
-[grpc interface screenshot]: img/CLI_gRPC_interface_screenshot.png
-[go library interface screenshot]: img/CLI_Go_library_interface_screenshot.png

rpc/internal/get_version_example/main.go

@@ -0,0 +1,50 @@
+// This file is part of arduino-cli.
+//
+// Copyright 2024 ARDUINO SA (http://www.arduino.cc/)
+//
+// This software is released under the GNU General Public License version 3,
+// which covers the main part of arduino-cli.
+// The terms of this license can be found at:
+// https://www.gnu.org/licenses/gpl-3.0.en.html
+//
+// You can be released from the requirements of the above licenses by purchasing
+// a commercial license. Buying such a license is mandatory if you want to
+// modify or otherwise use the software for commercial activities involving the
+// Arduino software without disclosing the source code of your own applications.
+// To purchase a commercial license, send an email to [email protected].
+
+package main
+
+import (
+	"context"
+	"log"
+	"time"
+
+	rpc "github.com/arduino/arduino-cli/rpc/cc/arduino/cli/commands/v1"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials/insecure"
+)
+
+func main() {
+	// Establish a connection with the gRPC server
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second)
+	conn, err := grpc.DialContext(ctx, "localhost:50051",
+		grpc.WithTransportCredentials(insecure.NewCredentials()),
+		grpc.WithBlock())
+	cancel()
+	if err != nil {
+		log.Println(err)
+		log.Fatal("error connecting to arduino-cli rpc server, you can start it by running `arduino-cli daemon`")
+	}
+	defer conn.Close()
+
+	// Create an instance of the gRPC clients.
+	cli := rpc.NewArduinoCoreServiceClient(conn)
+
+	// Now we can call various methods of the API...
+	versionResp, err := cli.Version(context.Background(), &rpc.VersionRequest{})
+	if err != nil {
+		log.Fatalf("Error getting version: %s", err)
+	}
+	log.Printf("arduino-cli version: %v", versionResp.GetVersion())
+}