Not able to add policies in SAM template

Question

I am working on SAM template for publishing my Application in AWS Serverless repository. But when I try to add policies for my lambda it shows me error: Invalid Serverless Appli

Answer 1

As of today (2018-10-09), SAM template already supports inline policy document.

Here is an example:-

Resources:
  SomeFunction:
    Type: AWS::Serverless::Function
    Properties:
      Handler: index.handler
      Runtime: nodejs8.10
      Policies:
      - Statement:
        - Sid: SSMDescribeParametersPolicy
          Effect: Allow
          Action:
          - ssm:DescribeParameters
          Resource: '*'
        - Sid: SSMGetParameterPolicy
          Effect: Allow
          Action:
          - ssm:GetParameters
          - ssm:GetParameter
          Resource: '*'

References:

1. AWS::Serverless::Function's Policies property on AWS SAM Specification
2. Related issue on GitHub