Nesting NotFoundError thrown is erroneously caught in meta file lookup

[DorianKwan]

Problem

No explicit error message when type declarations fail to be generated due to a meta file extension failure.

Existing message
[app-config][WARN] No files generated - did you add the correct meta properties?

Expected Behaviour

When type generations fail due to a failed file extension, write an error message indicating this to STDOUT.

Steps to Reproduce

Extend an app-config meta file within a new meta file and add a typo in the targeted file extension.

Run the generate command and notice the error message and that the type declarations haven't been generated.

[joelgallant]

@DorianKwan what file extension did you observe this with? Quicktype should throw errors for unsupported types.

[DorianKwan]

Sorry, I should've been more clear. In this case I'm referring to extending a root meta file

[joelgallant]

I guess I'm unclear still. Doing what you suggested results in QuickTypeError: Unknown output language st for me.

[gregnr]

@DorianKwan Best way to help reproduce is always an example. @joelgallant this is what happened today:

./services/my-service/.app-config.meta.yml:

$extends: ../../app-config.meta.yml # notice there was a typo here - we forgot the leading dot '.app-config.meta.yml'

generate:
   ...

...

When attempting to generate typings using yarn app-config generate, we get the error:

[app-config][WARN] No files generated - did you add the correct meta properties?

After discovering the true issue (typo on extended file), this error makes sense because it couldn't parse the meta file correctly.
But ideally because the path '../../app-config.meta.yml' didn't exist, we would expect an error from the $extends extension indicating that it couldn't extend because the file didn't exist.

[joelgallant]

Got it. Yeah, I vaguely knew this was possible, because meta file loading will ignore a NotFound error (for good reason, meta file isn't required). But if that error was bubbled up while parsing, it shouldn't be ignored.

[joelgallant]

Released in 2.6.1