sbt: publishing plugin to and resolving from local repo - sbt

Question

I am trying to publish an sbt plugin to a local file repo. In the plugin's build.sbt I have:
publishTo := Some(Resolver.file("localtrix", file("/Users/jast/repo/localtrix")))
I run the publish task and it gets published fine to
/Users/jast/repo/localtrix/org/me/sbt-plugin_2.12_1.0/1.2.3
In another project, I want to resolve this plugin. in project/plugins.sbt I have:
resolvers += Resolver.file("localtrix", file("/Users/jast/repo/localtrix"))
addSbtPlugin("org.me" % "sbt-plugin" % "1.2.3")
I try to run sbt in the this project and I get:
[info] Updating ProjectRef(uri("file:/Users/jast/playspace/untitled38/project/"), "untitled38-build")...
[warn] module not found: org.me#sbt-plugin;1.2.3
[warn] ==== typesafe-ivy-releases: tried
[warn] https://repo.typesafe.com/typesafe/ivy-releases/org.me/sbt-plugin/scala_2.12/sbt_1.0/1.2.3/ivys/ivy.xml
[warn] ==== sbt-plugin-releases: tried
[warn] https://repo.scala-sbt.org/scalasbt/sbt-plugin-releases/org.me/sbt-plugin/scala_2.12/sbt_1.0/1.2.3/ivys/ivy.xml/2017.2+4-3037ba82+20180314-1919/ivys/ivy.xml
[warn] ==== local: tried
[warn] /Users/jast/.ivy2/local/org.me/sbt-plugin/scala_2.12/sbt_1.0/1.2.3/ivys/ivy.xml
[warn] ==== public: tried
[warn] https://repo1.maven.org/maven2/org/me/sbt-plugin_2.12_1.0/1.2.3/sbt-plugin-1.2.3.pom
[warn] ==== local-preloaded-ivy: tried
[warn] /Users/jast/.sbt/preloaded/org.me/sbt-plugin/scala_2.12/sbt_1.0/1.2.3/ivys/ivy.xml
[warn] ==== local-preloaded: tried
[warn] file:////Users/jast/.sbt/preloaded/org/me/sbt-plugin_2.12_1.0/1.2.3/sbt-plugin-1.2.3.pom
[warn] ==== localtrix: tried
[warn] ::::::::::::::::::::::::::::::::::::::::::::::
[warn] :: UNRESOLVED DEPENDENCIES ::
[warn] ::::::::::::::::::::::::::::::::::::::::::::::
[warn] :: org.me#sbt-plugin;1.2.3: not found
[warn] ::::::::::::::::::::::::::::::::::::::::::::::
So how can I publish to a local repo it in a way that also gets resolved correctly?
Note: publishLocal and resolving from .ivy2/local works, but I want to be able to publish to a repo that I can copy to another machine without messing with that directory.

Answer 1

sbt plugins by default are published ivy-style, so you when you refer to your local repository, use Resolver.ivyStylePatterns. To publish:
publishTo := Some(Resolver.file("localtrix", file("/Users/jast/repo/localtrix"))(Resolver.ivyStylePatterns))
And to resolve:
resolvers += Resolver.file("localtrix", file("/Users/jast/repo/localtrix"))(Resolver.ivyStylePatterns)
addSbtPlugin("org.me" % "sbt-plugin" % "1.2.3")
Alternatively you can set publishMavenStyle := true for the plugin, but I see that you already figured that out.

Answer 2

You missed scala version in name. And you have also strange suffix in plugin name _1.0 in your published artifact, so just fixing scala version could be not enough.
This should work.
addSbtPlugin("org.me" % "sbt-plugin_2.12_1.0" % "1.2.3")
If you find out where came this suffix _1.0 from, fix on scala version should help:
addSbtPlugin("org.me" %% "sbt-plugin" % "1.2.3")
Update after comment
Ok, thanks, I did not know that for plugins it works differently.
But try to define resolver differently for resolvers (works for me):
resolvers += "localtrix" at "file:///Users/jast/repo/localtrix"
addSbtPlugin("org.me" % "sbt-plugin" % "1.2.3")