process.env.IS_OFFLINE is always undefined

[gkylafas]

Scenario

Suppose you have configured plugins serverless-dynamodb-local, serverless-offline and serverless-dynamodb-client. Then, you execute commands

$ sls offline & [1]
$ sls invoke local -f function --path input.json [2]

Result

The AWS dynamodb instance will be used, not the local one.

Explanation

The reason is that:

• command [1] sets environment variable IS_OFFLINE not to the parent shell but to the sls offline process
• when command [2] is executed, it inherits the environment of the shell, which has no IS_OFFLINE defined. So, when require('serverless-dynamodb-client') is called, isOffline() always returns false.

Workaround

Execute

$ export IS_OFFLINE=true

before command [2]