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Build Status Maven Central License

HERE SBT BOM plugin

Introduction

The HERE platform SBT BOM plugin provides a way to use Maven BOM (bill of materials) in SBT projects. The plugin features importing multiple BOM files to use as a source of dependency versions, automatically processing parent and dependent BOMs.

Limitation

The HERE platform SBT BOM plugin is provided "as is" and is not officially a part of HERE Workspace or HERE Marketplace. While there is no official support by HERE, you may still raise issues via GitHub. We may be able to help.

Prerequisites

This plugin is compatible with:

  • sbt 1.3.0 or newer

How to use it

The following text provides a step-by-step guide on how to import Jackson BOM into an sbt project.

Load the plugin

Add the sbt-bom plugin to plugins.sbt file.

addSbtPlugin("com.here.platform" % "sbt-bom" % "1.0.14")

Add Maven central repository in your resolvers

If you're encountering issues or using earlier versions, you might have to explicitly declare the Maven Central repository:

resolvers += Resolver.url(
  "MAVEN_CENTRAL",
  url("https://repo.maven.apache.org/maven2"))(
  Patterns("[organisation]/[module]/[revision]/[artifact]-[revision](-[classifier]).[ext]") )

This will enable the project to access plugin files stored in Maven Central, https://repo.maven.apache.org/maven2/com/here/platform/sbt-bom_2.12_1.0/.

Read & use a BOM

There are different ways to use the plugin depending on your use case.

Use it in dependencyOverrides (Bom.dependencies)

If you want to get all the dependencies declared in the BOM and use their version to override yours.

Use the following setup in your build.sbt:

import com.here.bom.Bom

// Declare the BOM
// Note the usage of Bom.dependencies method
lazy val jacksonDependencies = Bom.dependencies("com.fasterxml.jackson" % "jackson-bom" % "2.14.2")

lazy val `demo` = project
  .in(file("."))
  // Load the BOM
  .settings(jacksonDependencies)
  // Add all dependencies of the BOM in dependencyOverrides
  .settings(
    dependencyOverrides ++= jacksonDependencies.key.value
  )

Use it in dependencyOverrides and libraryDependencies (Bom.apply)

If you want to:

  • get all the dependencies declared in the BOM and use their version to override yours,
  • also use the version of a BOM dependency explicitly

Use the following setup in your build.sbt:

import com.here.bom.Bom

// Declare the BOM
// Note the usage of Bom.apply method
lazy val jacksonBom = Bom("com.fasterxml.jackson" % "jackson-bom" % "2.14.2")

lazy val `demo` = project
  .in(file("."))
  // Load the BOM
  .settings(jacksonBom)
  // Add some explicit dependencies
  .settings(
    libraryDependencies += "com.fasterxml.jackson.core" % "jackson-core" % jacksonBom.key.value
  )
  // Add all dependencies of the BOM in dependencyOverrides
  .settings(
    dependencyOverrides ++= jacksonBom.key.value.bomDependencies
  )

Custom usage (Bom.read)

In addition to the common usages described above, you can also use the BOM in a custom way thanks to Bom.read.

Example, in your build.sbt:

import com.here.bom.Bom

// Declare the BOM and map it to a custom class
// Note the usage of Bom.read method
lazy val jacksonDependencies = Bom.read("com.fasterxml.jackson" % "jackson-bom" % "2.14.2")(bom => Dependencies(bom))

lazy val `demo` = project
  .in(file("."))
  // Load the BOM
  .settings(jacksonDependencies)
  // Add some explicit dependencies
  .settings(
    libraryDependencies ++= jacksonDependencies.key.value.someDependencies
  )
  // Add all dependencies of the BOM in dependencyOverrides
  .settings(
    dependencyOverrides ++= jacksonDependencies.key.value.allDependencies
  )

And in a project/Dependencies.scala file:

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

case class Dependencies(bom: Bom) {
  val someDependencies: Seq[ModuleID] = Seq(
    "com.fasterxml.jackson.core" % "jackson-core" % bom
  )
  
  val allDependencies: Seq[ModuleID] = bom.bomDependencies
}

Password-protected repositories

The following text explains how to access password-protected repositories, specifically the HERE platform repository, using a file with credentials.

For accessing password-protected repositories, such as the HERE platform repository, you need to create a file with credentials at ~/.sbt/.credentials with the following content:

realm=Artifactory Realm
host=repo.platform.here.com
user=<your used id>
password=<top secret password>

The user name and password can be retrieved as described in the Get your repository credentials tutorial.

Then include the credentials in build.sbt file:

project.settings(
  credentials += Credentials(Path.userHome / ".sbt" / ".credentials")
)

and include the HERE platform repository resolver:

ThisBuild / resolvers += (
  "HERE Platform Repository" at "https://repo.platform.here.com/artifactory/open-location-platform"
)

Now the project is configured to use BOM files from a password-protected repository. For example, sdk-batch-bom can be used.

lazy val sdkBom = Bom.read("com.here.platform" %% "sdk-batch-bom" % "2.57.3")(bom => Dependencies(bom))

The credentials can be supplied through these methods, with the following precedence:

  1. By passing the command line parameter -Dsbt.boot.credentials=<file>.
  2. Via the environment variable SBT_CREDENTIALS=<file>.
  3. By creating the file ~/.sbt/.credentials in your home directory.
  4. By creating the file ~/.ivy2/.credentials in your home directory.

Resolving issues

If your project packaging fails, you can examine the plugin debug logs using the following commands:

sbt package
sbt last

This sequence of commands will print all the logs generated during packaging to the console.

Contributors

License

Copyright (C) 2019-2024 HERE Europe B.V.

Unless otherwise noted in LICENSE files for specific files or directories, the LICENSE in the root applies to all content in this repository.