Completion not work for application.y*a*ml files

[Eskibear]

As mentioned here:

Q: Is there an official extension for YAML files?
A: Please use ".yaml" when possible.

Currently it looks that the completion only works for .yml files.
https://github.com/spring-projects/sts4/blob/e8f2840966e9bee7ce3948ee4662136e78103862/eclipse-language-servers/org.springframework.tooling.boot.ls/plugin.xml#L44-L57

I don't know if it's a bug or Spring convention to only use .yml as file extension. Maybe it would be better to also include support for such .yaml files.

[kdvolder]

The properties files for spring boot apps are typically called application.yml. I'm not sure if spring boot will pick it up if its called application.yaml. To be honest it never occurred to me as I'd never seen an example project with a application.yaml in it. I'll give it a try though and report back in a bit.

[kdvolder]

Looks like application.yaml works just as well (I just tried it). So I think it would make good sense to extend the file associations to allow either .yml or .yaml.

[spring-projects-issues]

(comment in Pivotal Tracker added by Kris De Volder:)

Should be working now for vscode and eclipse. Assinging this to @alexboyko to take a look at atom.

[spring-projects-issues]

(comment in Pivotal Tracker added by Martin Lippert:)

I installed the latest vsix build into VSCode, but a file called application.yaml is not being recognized as a spring properties file, therefore no content-assist showing up.

[spring-projects-issues]

(comment in Pivotal Tracker added by Kris De Volder:)

Looks like I messed something up pushing changes. Pushed a old version which has a typo in the package.json. Should be fixed now but I'll double-check snapshot build before redelivering.