Extract list of dependencies from the BOM

[gaeljw]

Solves #9

This adds:

• a bomDependencies: Seq[ModuleID] method to Bom instances
• a Bom.dependencies(...) helper method in the companion object for cases where you only care about bomDependencies but don't need to extract anything else manually from the Bom

I've also updated the README with documentation on this new usage and small changes (each in a different commit).

Tests

I've tested this locally using the example described in #9 and it works successfully.

Example build.sbt file:

import sbt._
import com.here.bom.Bom

lazy val jacksonBom = Bom.dependencies("com.fasterxml.jackson" % "jackson-bom" % "2.16.0")

lazy val `sbt-bom-example-github` = project
  .in(file("."))
  .settings(jacksonBom)
  .settings(
    name := "sbt-bom-example-github",
    // resolvers := Resolver.mavenCentral +: resolvers.value,
    libraryDependencies += "com.typesafe.play" %% "play" % "2.8.21",
    libraryDependencies += "com.fasterxml.jackson.module" %% "jackson-module-scala" % "2.15.0",
    dependencyOverrides ++= jacksonBom.key.value,
  )

Which gives the expected result in terms of versions. Here's a sbt dependencyTree extract:

[info] sbt-bom-example-github:sbt-bom-example-github_2.12:0.1.0-SNAPSHOT [S]
[info]   +-com.fasterxml.jackson.module:jackson-module-scala_2.12:2.16.0
[info]   +-com.typesafe.play:play_2.12:2.8.21 [S]
[info]     +-com.fasterxml.jackson.core:jackson-annotations:2.16.0
[info]     +-com.fasterxml.jackson.core:jackson-core:2.16.0
[info]     +-com.fasterxml.jackson.core:jackson-databind:2.16.0
[info]     | +-com.fasterxml.jackson.core:jackson-annotations:2.16.0
[info]     | +-com.fasterxml.jackson.core:jackson-core:2.16.0
[info]     | 
[info]     +-com.fasterxml.jackson.datatype:jackson-datatype-jdk8:2.16.0
[info]     | +-com.fasterxml.jackson.core:jackson-core:2.16.0
[info]     | +-com.fasterxml.jackson.core:jackson-databind:2.16.0
[info]     |   +-com.fasterxml.jackson.core:jackson-annotations:2.16.0
[info]     |   +-com.fasterxml.jackson.core:jackson-core:2.16.0
[info]     |   
[info]     +-com.fasterxml.jackson.datatype:jackson-datatype-jsr310:2.16.0
[info]     | +-com.fasterxml.jackson.core:jackson-annotations:2.16.0
[info]     | +-com.fasterxml.jackson.core:jackson-core:2.16.0
[info]     | +-com.fasterxml.jackson.core:jackson-databind:2.16.0
[info]     |   +-com.fasterxml.jackson.core:jackson-annotations:2.16.0
[info]     |   +-com.fasterxml.jackson.core:jackson-core:2.16.0
...

[gaeljw]

@molekyla could you (or someone else) give a look at this PR? The feature would be quite useful to me.

[molekyla]

@gaeljw Sorry for delay. I haven't enough time to test this changes. At the first glance it looks good, but I want to test it on my small project. Will give take a look in a next few day

[gaeljw]

Thanks @molekyla . Do you know when this can be part of a release?

[molekyla]

@gaeljw Already been released under the 1.0.8 version. Despite that label in the README.md file shows that latest version is 1.0.7

Also this changes will be integrated in examples in near future

[gaeljw]

Awesome! Will use it right now then :D