Tracker: Migrate from in-repo mill plugin to external project

[lefou]

Here is the plan:

• Migrate the code of the mill-plugin to a separate repository, see also Mill plugin cross-compiles on the wrong axis - consider outsourcing #2704
• Done: https://github.com/scala-steward-org/mill-plugin
• Decide an a version scheme for external mill-plugin and make a first release
• Done: first release version: 0.17.0
• Refactor scala-steward code to use the new external plugin
• PR: Refactored MillAlg to use external plugin project #2821
• PR: Fix: Replaced import logic in predef script for Mill projects #2823
• Remove mill-plugin module from this project
• Update documentation (there is none affected)

[fthomas]

This plan looks good to me.

Decide an a version scheme for external mill-plugin and make a first release

What kind of version scheme do you have in mind? I would probably just start with a 0.0.1 or 0.1.0 and check if it is working here.

[lefou]

This plan looks good to me.

Decide an a version scheme for external mill-plugin and make a first release

What kind of version scheme do you have in mind? I would probably just start with a 0.0.1 or 0.1.0 and check if it is working here.

I'd rather avoid any version collisions or confusion with previously released versions of this plugin (as part of scala-steward releases). Scala Steward is currently on 0.16.x, so maybe we can start with 0.17.0 or something like that.

[fthomas]

I'd rather avoid any version collisions or confusion with previously released versions of this plugin (as part of scala-steward releases). Scala Steward is currently on 0.16.x, so maybe we can start with 0.17.0 or something like that.

Good point. I forgot that we already release the mill-plugin that is in this repo: https://repo1.maven.org/maven2/org/scala-steward/scala-steward-mill-plugin_2.13/ :-)

0.17.0 sounds good to me. Does the new plugin will have the same artifactId as the old one?

[lefou]

I'd rather avoid any version collisions or confusion with previously released versions of this plugin (as part of scala-steward releases). Scala Steward is currently on 0.16.x, so maybe we can start with 0.17.0 or something like that.

Good point. I forgot that we already release the mill-plugin that is in this repo: https://repo1.maven.org/maven2/org/scala-steward/scala-steward-mill-plugin_2.13/ :-)

0.17.0 sounds good to me. Does the new plugin will have the same artifactId as the old one?

In principle yes. (Currently, it's mill-scala-steward, but I'm going to change that.) But the final artifactId will also contain the Mill platform. E.g. the full GAV for Mill 0.10 version will eventually look like this: org.scala-steward:scala-steward-mill-plugin_mill0.10_2.13:0.17.0

[lefou]

Is there any documentation that needs change or additions?

[fthomas]

I'm not aware of any existing documentation that needs to be updated.

[lefou]

Thank. I think this is completed now. Thank you all!

[fthomas]

Many thanks @lefou for working on this!

[fthomas]

I guess it would be nice to release this soon. @scala-steward-org/core any objections against publishing current main as 0.17.0?

[fthomas]

0.17.0 has just been released.