ci: snapshot publish workflow

[nsenave]

Add workflow that allow to publish snapshot version (in maven central snapshot repository) in pull requests, when the label publish-snapshot is applied.

[FBibonne]

Ok for me. Maybe could we improve the pattern for snapshot versions in order to specify different metadata (RC, milestone, ...) ?

[FBibonne]

Semver pattern allows richer chains for previous release version or release metadata (https://semver.org/lang/fr/#spec-item-9 and item 10 also). Maybe patterns like ^[0-9]+.[0-9]+.[0-9]+-[0-9A-Za-z-]+$ should be better

[nsenave]

I quite like enforcing "snapshot" since it has a meaning for maven (snapshots have a different overwrite mechanism), and adding other tags introduces some complexity that often feels not necessary

Yet it is restrictive in regards to semver... so we could use the more complex regex.

Isn't the "+" symbol missing for metadata?

[FBibonne]

I propose this pattern : (?>^[0-9]+.[0-9]+.[0-9]+-SNAPSHOT$)|(?>^[0-9]+.[0-9]+.[0-9]+-SNAPSHOT\+[0-9A-Za-z-]+$)

it means that the version must match ^[0-9]+.[0-9]+.[0-9]+-SNAPSHOT$ (for example 1.1.1-SNAPSHOT) or must match ^[0-9]+.[0-9]+.[0-9]+-SNAPSHOT\+[0-9A-Za-z-]+$ (for example 1.1.1-SNAPSHOT+feat1). So it is mandatory the version starts with x.y.z-SNAPSHOT and then it may be suffixed by a string wich starts with +

[nsenave]

great!

[nsenave]

Maven publishing fails:

* What went wrong:
Execution failed for task ':model:publishMavenJavaPublicationToOSSRHRepository'.
> Failed to publish publication 'mavenJava' to repository 'OSSRH'
10 actionable tasks: 10 executed
   > Could not PUT 'https://oss.sonatype.org/content/repositories/snapshots/fr/insee/ddi/ddi-lifecycle/1.0.0-SNAPSHOT/maven-metadata.xml'. Received status code 401 from server: Unauthorized

I suspect that credentials might be incorrect (maybe extra quotes or something), yet I cannot access InseeFr credentials.

A link that may help: https://central.sonatype.org/faq/401-error/

[github-actions]

👋 Version 1.0.0-SNAPSHOT published on maven central repository