How to split a serverless configuration file? - serverless

Question

I'm trying to split my serverless configuration file serverless.yml into multiple files using the ${file(...)} syntax. I have a provider file config/serverless/provider.yml with the following content:
provider:
name: ...
...
And in my serverless.yml I've used it in the following way:
provider: ${file(config/serverless/provider.yml):provider}
However, when I run serverless deploy, I get the following error:
Cannot resolve serverless.yml: Variables resolution errored with:
- Cannot resolve variable at "provider": Value not found at "file"
Please help me to understand how to properly include other files in my serverless configuration.
NOTE: I've also tried with this config without success
provider.yml
name: ...
...
serverless.yml
...
resources:
- ${file(config/serverless/provider.yml)}

Answer 1

Cannot resolve serverless.yml: Variables resolution errored with:
- Cannot resolve variable at "provider": Value not found at "file"
The error is not finding a value at "file" double check the file path.
Make sure the path you are using in ${file(<this-path-here>):provider}
It is pointing to the correct file.
The following works:
File: serverless.yml
service: serverless-framework-include-files
frameworkVersion: "3"
provider: ${file(config/provider.yml):provider}
functions:
function1:
handler: index.handler
File: config/provider.yml
provider:
name: aws
runtime: nodejs18.x
Alternatively, you can remove the :provider from the ${file(...):provider}:
The following works:
File: serverless2.yml
service: serverless-framework-include-files
frameworkVersion: "3"
provider: ${file(config/provider2.yml)}
functions:
function1:
handler: index.handler
File: config/provider2.yml
name: aws
runtime: nodejs18.x
For resources:, the same applies.
This works:
File: serverless.yml
resources:
- ${file(resources/s3-bucket.yml)}
- ${file(resources/dynamodb-table.yml)}
File: resources/s3-bucket.yml
Resources:
MyBucket:
Type: AWS::S3::Bucket
Properties:
BucketName: my-bucket
AccessControl: PublicRead
WebsiteConfiguration:
IndexDocument: index.html
ErrorDocument: error.html
Alternatively, you can do:
File serverless2.yml
resources:
Resources:
MyBucket: ${file(resources/s3-bucket2.yml)}
MyTable: ${file(resources/dynamodb-table2.yml)}
File resources/dynamodb-table2.yml
Type: AWS::DynamoDB::Table
Properties:
TableName: ${self:service}
AttributeDefinitions:
- AttributeName: id
AttributeType: S
KeySchema:
- AttributeName: id
KeyType: HASH
ProvisionedThroughput:
ReadCapacityUnits: 1
WriteCapacityUnits: 1
You can check the GitHub code for a working example:
https://github.com/oieduardorabelo/serverless-framework-include-files