Max length char of 140 for layers arn in `lambda update-function-configuration --layers` command about aws-cli HOT 1 OPEN

Hi @gcontarini - thanks for your patience here. The CLI update-function-config command corresponds to the Lambda UpdateFunctionConfig API. Therefore, any changes to the ARN validation requirements would need to be implemented by the Lambda service team (and then would be reflected in the AWS CLI/SDKs).

But in this case it appears that the input validation will fail with a comma-separated list even if each individual ARN or total length of ARNs is less than 140 chars. As an alternative, you can use the --cli-input-json parameter, for example:

aws lambda update-function-configuration \
    --function-name <function_name> \
    --cli-input-json '{"Layers": ["arn:aws:lambda:us-west-2:<account>:layer:<layer>:<version>", "arn:aws:lambda:us-west-2:<account>:layer:<layer>:<version>, "arn:aws:lambda:us-west-2:<account>:layer:<layer>:<version>"]}'

Maybe the CLI documentation could be improved here in regard to when --cli-input-json should be used versus a comma-separated list.

Edit: updating this to a feature request to improve the documentation here, specifically to have more visibility on when to use --cli-input-json. But as mentioned, the 140 length limit is imposed by the API:

from aws-cli.