Create a custom layer

Python runtime

1. Create a working directory:

   mkdir my-layer-code
   cd my-layer-code

2. Install dependencies into the python subdirectory:

   pip install --target ./python <package-name>

   Example with numpy:

   pip install --target ./python numpy

   After installation, the directory structure looks like this:

   my-layer-code
   └── python
       ├── bin
       ├── numpy
       ├── numpy-1.22.4.dist-info
       └── numpy.libs

3. Package the dependencies from the my-layer-code directory:

   zip -r my-layer-code.zip python

Node.js runtime

1. Create a working directory:

   mkdir my-layer-code
   cd my-layer-code

2. Install dependencies into the nodejs subdirectory:

   npm install --prefix ./nodejs --save <package-name>

   Example with uuid:

   npm install --prefix ./nodejs --save uuid

   After installation, the directory structure looks like this:

   my-layer-code
   └── nodejs
       ├── node_modules
       │   └── uuid
       ├── package-lock.json
       └── package.json

3. Package the dependencies from the my-layer-code directory:

   zip -r my-layer-code.zip nodejs

Java runtime

1. Create a working directory:

   mkdir my-layer-code/java
   cd my-layer-code/java

2. Create a pom.xml file that declares your dependencies. The following example installs commons-lang3 and copies it to ./lib using the maven-dependency-plugin:

   <?xml version="1.0" encoding="UTF-8"?>
   <project xmlns="http://maven.apache.org/POM/4.0.0"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
       <modelVersion>4.0.0</modelVersion>
       <groupId>maven.util</groupId>
       <artifactId>install-layer</artifactId>
       <version>1.0</version>
       <dependencies>
           <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
           <dependency>
               <groupId>org.apache.commons</groupId>
               <artifactId>commons-lang3</artifactId>
               <version>3.12.0</version>
           </dependency>
       </dependencies>
       <build>
           <plugins>
               <plugin>
                   <artifactId>maven-dependency-plugin</artifactId>
                   <configuration>
                       <!-- Include transitive dependencies -->
                       <excludeTransitive>false</excludeTransitive>
                       <!-- Keep version suffixes in JAR file names -->
                       <stripVersion>false</stripVersion>
                       <!-- Output directory for downloaded JARs -->
                       <outputDirectory>./lib</outputDirectory>
                   </configuration>
               </plugin>
           </plugins>
       </build>
   </project>

3. Install the dependencies:

   mvn dependency:copy-dependencies

   After installation, the directory structure looks like this:

   my-layer-code
   └── java
       └── lib
           └── commons-lang3-3.12.0.jar

4. Package the dependencies from the my-layer-code directory:

   zip -r my-layer-code.zip java

PHP runtime

1. Create a working directory:

   mkdir -p my-layer-code/php
   cd my-layer-code/php

2. Create a composer.json file that declares your dependencies. Example:

   {
     "require": {
       "aliyunfc/fc-php-sdk": "~1.2",
       "alibabacloud/fnf": "^1.7"
     }
   }

3. Install the dependencies:

   composer install

   After installation, the directory structure looks like this:

   my-layer-code
   └── php
       ├── composer.json
       ├── composer.lock
       └── vendor

4. Package the dependencies from the my-layer-code directory:

   zip -r my-layer-code.zip php

Using the console

Using Serverless Devs