在需要使用最新代码或者需要进行定制化开发时，则一般需要从源码方式进行安装，在本文中对这种使用方式进行介绍。
整体步骤
和大多数基于npm打包的应用一样，按步骤使用如下命令即可完成Node-RED的安装与服务启动。
- 步骤1: 下载源码
执行命令： git clone https://github.com/node-red/node-red.git
- 步骤2: 安装依赖
执行命令： cd node-red; npm install
- 步骤3: 执行构建
执行命令： npm run build
- 步骤4: 运行Node-RED
执行命令： npm start
安装与说明
- 下载源码
liumiaocn:~ liumiao$ git clone https://github.com/node-red/node-red.git
Cloning into 'node-red'...
remote: Enumerating objects: 11, done.
remote: Counting objects: 100% (11/11), done.
remote: Compressing objects: 100% (10/10), done.
remote: Total 48916 (delta 0), reused 4 (delta 0), pack-reused 48905
Receiving objects: 100% (48916/48916), 19.04 MiB | 262.00 KiB/s, done.
Resolving deltas: 100% (33405/33405), done.
liumiaocn:~ liumiao$
- 安装依赖
liumiaocn:~ liumiao$ cd node-red; npm install
...省略
added 1219 packages from 1528 contributors in 109.95s
...省略
liumiaocn:node-red liumiao$ ls
API.md CONTRIBUTING.md README.md node_modules packages
CHANGELOG.md Gruntfile.js SECURITY.md package-lock.json scripts
CODE_OF_CONDUCT.md LICENSE jsdoc.json package.json test
liumiaocn:node-red liumiao$
- 执行构建
liumiaocn:node-red liumiao$ npm run build
> [email protected] build /Users/liumiao/node-red
> grunt build
Running "clean:build" (clean) task
>> 0 paths cleaned.
Running "jsonlint:messages" (jsonlint) task
>> 30 files lint free.
Running "jsonlint:keymaps" (jsonlint) task
>> 1 file lint free.
Running "concat:build" (concat) task
Running "concat:vendor" (concat) task
Running "copy:build" (copy) task
Created 10 directories, copied 83 files
Running "uglify:build" (uglify) task
>> 4 files created 1.68 MB → 654.32 kB
Running "sass:build" (sass) task
Running "attachCopyright:js" (attachCopyright) task
Attached copyright to packages/node_modules/@node-red/editor-client/public/red/red.min.js
Attached copyright to packages/node_modules/@node-red/editor-client/public/red/main.min.js
Running "attachCopyright:css" (attachCopyright) task
Attached copyright to packages/node_modules/@node-red/editor-client/public/red/style.min.css
Done.
liumiaocn:node-red liumiao$
- 运行Node-RED
liumiaocn:node-red liumiao$ npm start
> [email protected] start /Users/liumiao/node-red
> node packages/node_modules/node-red/red.js
5 Mar 06:30:16 - [info]
Welcome to Node-RED
===================
5 Mar 06:30:16 - [info] Node-RED version: v1.0.4
5 Mar 06:30:16 - [info] Node.js version: v10.15.3
5 Mar 06:30:16 - [info] Darwin 19.2.0 x64 LE
5 Mar 06:30:16 - [info] Loading palette nodes
5 Mar 06:30:16 - [info] Settings file : /Users/liumiao/.node-red/settings.js
5 Mar 06:30:16 - [info] Context store : 'default' [module=memory]
5 Mar 06:30:16 - [info] User directory : /Users/liumiao/.node-red
5 Mar 06:30:16 - [warn] Projects disabled : editorTheme.projects.enabled=false
5 Mar 06:30:16 - [info] Flows file : /Users/liumiao/.node-red/flows_liumiaocn.json
5 Mar 06:30:16 - [info] Creating new flow file
5 Mar 06:30:16 - [warn]
---------------------------------------------------------------------
Your flow credentials file is encrypted using a system-generated key.
If the system-generated key is lost for any reason, your credentials
file will not be recoverable, you will have to delete it and re-enter
your credentials.
You should set your own key using the 'credentialSecret' option in
your settings file. Node-RED will then re-encrypt your credentials
file using your chosen key the next time you deploy a change.
---------------------------------------------------------------------
5 Mar 06:30:16 - [info] Starting flows
5 Mar 06:30:16 - [info] Started flows
5 Mar 06:30:16 - [info] Server now running at http://127.0.0.1:1880/
- 结果确认
注：也可以指定端口和其他设定，执行示例如下所示：
liumiaocn:node-red liumiao$ node packages/node_modules/node-red/red.js -p 8080
5 Mar 06:32:04 - [info]
Welcome to Node-RED
===================
5 Mar 06:32:04 - [info] Node-RED version: v1.0.4
5 Mar 06:32:04 - [info] Node.js version: v10.15.3
5 Mar 06:32:04 - [info] Darwin 19.2.0 x64 LE
5 Mar 06:32:05 - [info] Loading palette nodes
5 Mar 06:32:05 - [info] Settings file : /Users/liumiao/.node-red/settings.js
5 Mar 06:32:05 - [info] Context store : 'default' [module=memory]
5 Mar 06:32:05 - [info] User directory : /Users/liumiao/.node-red
5 Mar 06:32:05 - [warn] Projects disabled : editorTheme.projects.enabled=false
...省略
5 Mar 06:32:05 - [info] Started flows
5 Mar 06:32:05 - [info] Server now running at http://127.0.0.1:8080/
