Add support to configure packages-to-scan as list using YAML Syntax

[pieterdegraeuwe]

I am not able to use packages-to-scan nor paths-to-match. using one package or one path does work.
However, from the moment I want a list of more than one element it resolves in just one list with one element, of null:

`springdoc :
packages-to-scan :

• val1
• val2
  (the dots are dashes, escaping them in markdown does not seem to work)
  `

springdoc : packages-to-scan : some.package
Gives a list, with one element. (so this seems to work als long as you need only one package/path)

springdoc : packages-to-scan : some.package, some.secondpackage
does resolve in a list with one element ; "some.package, some.secondpackage', which is of course not the result we want.

Looking to the code, I think that it just cannot work. It is used as a simple @value(SPRINGDOC_PACKAGES_TO_SCAN) inside the AbstractOpenApiResource, while (I think) those lists only work in ConfigurationProperties.

Easy to reproduce: add
@Value(SPRINGDOC_PACKAGES_TO_SCAN) private List<String> packagesToScan;
in the test AbstractSpringDocTest. and add some packages to the application-test.yml

Any hints how to get around this? (or am I missing something?)
Thanks

[bnasslahsen]

@pablomusumeci,

The property SPRINGDOC_PACKAGES_TO_SCAN is already defined in SpringDocConfigProperties.
You have already sample tests with list of values;

• https://github.com/springdoc/springdoc-openapi/blob/master/springdoc-openapi-webmvc-core/src/test/java/test/org/springdoc/api/app63/SpringDocApp63Test.java

springdoc:
  packages-to-scan: test.org.springdoc.api.app63.toto, test.org.springdoc.api.titi

Maybe you are not testing with the latest stable version. v1.2.28
If you are still facing this problems, please add the sample code or your git repository link to reproduce and this issue will be reopened.

[pieterdegraeuwe]

@bnasslahsen
I've created a repo which reproduces the problem.
Agreed, using comma separated paths, It seems to work. However, using the standard yml list notation, the list becomes null;

https://github.com/pieterdegraeuwe/springdoc-bugtest/blob/master/src/main/resources/application.yml

[bnasslahsen]

I confirm the support to configure package-to-scan as list using YAML syntax will be added for the next release v1.2.29.

[pieterdegraeuwe]

looking forward tot test that version.
Note that the comma separated list did only seem to work on springboot2, not on springboot1.5

Thx.