Online Dependency Installation

Last updated: 2021-07-28 17:42:45

Overview

Tencent Cloud SCF supports online dependency installation during function deployment.

Features

Note：

Currently, online dependency installation is supported only for Node.js.

If "Online install dependency" is enabled in the function configuration, each time the code is uploaded, the SCF backend will check the package.json file in the root directory of the code package and try using npm install to install the dependencies based on the dependencies in package.json.

For example, if the package.json file in the project lists the following dependency:

{
    "dependencies": {
    "lodash": "4.17.15"
  }
}

Then this dependency will be imported into the function during the deployment:

const _ = require('lodash');
exports.handle = (event, context, callback) => {
  _.chunk(['a', 'b', 'c', 'd'], 2);
  // => [['a', 'b'], ['c', 'd']]
};

Directions

You can implement the dependency installation feature of SCF in either of the following ways:

Enabling automatic dependency installation
Using npm to directly install Node.js dependencies

Log in to the SCF console and select the Guangzhou region.
Select Function Service on the left sidebar and select the function name on the Function Service list page.
Select the Function code tab and modify the function code as needed.
In the top-right corner of the IDE code editing window, click and select Automatic dependency installation: disable in the drop-down list to enable automatic dependency installation as shown below:
Click Deploy, and the SCF backend will automatically install dependencies according to package.json.

Select the Terminal tab on the menu bar at the top of the IDE code editing window and select New Terminal in the drop-down list.
Run the following command in the opened terminal to enter the function root directory /src.

cd src

Run the npm command to install the Node.js dependency package. For example, run the following command to add the lodash dependency package:

npm install lodash

4. Click Deploy to package and sync the successfully installed dependency package and function together to the cloud.

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