AWS SAM无法构建层

Question

我读到过，SAM现在支持构建层，并遵循了here中提到的说明。但是，当我尝试使用sam build samDeployLayer在本地构建图层时，会遇到构建错误

Build Failed
Error: NodejsNpmBuilder:NpmPack - NPM Failed: npm ERR! code ENOLOCAL
npm ERR! Could not install from "E:\Development\sam-deploy\src\sam-deploy-layer" as it does not contain a package.json file.

下面是我的模板文件：

AWSTemplateFormatVersion: 2010-09-09
Description: >-
  sam-deploy
Transform:
- AWS::Serverless-2016-10-31
Resources:
  samDeploy:
    Type: AWS::Serverless::Function
    Properties:
      CodeUri: src/sam-deploy
      Handler: index.handler
      Runtime: nodejs12.x
      MemorySize: 128
      Timeout: 100
      Description: A Lambda function that returns a static string.
      FunctionName: "sam-deploy"
      Layers:
        - !Ref samDeployLayer
      Policies:
        # Give Lambda basic execution Permission to the helloFromLambda
        - AWSLambdaBasicExecutionRole
  samDeployLayer:
    Type: AWS::Serverless::LayerVersion
    Properties:
      LayerName: sam-deploy-layer
      ContentUri: src/sam-deploy-layer
      CompatibleRuntimes:
        - nodejs12.x
    Metadata:
      BuildMethod: nodejs12.x

根据构建层的要求，我已经包含了CompatibleRuntimes和Metadata属性。这一层的package.json位于src/sam-deploy-layer/nodejs，这是nodeJS运行时所需的，我使用的是SAM version0.53.0。我做错了什么？

Answer 1

将package.json放在src/sam-deploy-layer/下。在运行sam build之后，应该创建目录.aws-sam/build/samDeployLayer/nodejs/node_modules/。

Answer 2

您应该在src/sam-deploy-layer中创建一个名为nodejs的文件夹。在这里，您可以执行npm init和npm install (在您的层中安装包)。