Overwriting variable resolution require string fallbacks to be fully resolvable #7435
Description
Bug Report
Description
1. What did you do?
In my serverless.yaml I declare a variable with this syntax: ${env:SomeUrl, "${cf:my-stack.ServiceEndpoint}/api"}.
My intent is to use the cloudformation resolution (which only gives part of url) in most cases. But in some cases I want to override the URL by a sysenv variable. For example when there is no "my-stack" deployed.
But if I set env variable SomeUrl and my-stack is not deployed deployed, it fails :-(
2. What happened?
ServerlessError: Stack with id my-stack does not exist
3. What should've happened?
The resolver should succeed by just successfully resolve env:SomeUrl. Because the second part is only some kind of fallback it is of no interest if the first part is resolvable.
4. What's the content of your serverless.yml file?
custom:
- someurl: ${env:SomeUrl, "${cf:my-stack.ServiceEndpoint}/api"}
5. What's the output you get when you use the SLS_DEBUG=* environment variable (e.g. SLS_DEBUG=* serverless deploy)
I call SLS_DEBUG=* SomeUrl=http://localhost/foo sls package
The output is
[...]
Serverless: [AWS cloudformation 400 0.267s 0 retries] describeStacks({ StackName: 'my-stack' })
Serverless Error ---------------------------------------
ServerlessError: Stack with id my-stack does not exist
at C:\Users\xyz\AppData\Roaming\npm\node_modules\serverless\lib\plugins\aws\provider\awsProvider.js:329:27
at processTicksAndRejections (internal/process/task_queues.js:97:5)
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Docs: docs.serverless.com
Bugs: github.com/serverless/serverless/issues
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Your Environment Information ---------------------------
Operating System: win32
Node Version: 12.16.1
Framework Version: 1.65.0
Plugin Version: 3.4.1
SDK Version: 2.3.0
Components Version: 2.22.3