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The Paketo Buildpack for SBT is a Cloud Native Buildpack that builds SBT-based applications from source.


This buildpack will participate all the following conditions are met

  • <APPLICATION_ROOT>/build.sbt exists

The buildpack will do the following:

  • Requests that a JDK be installed
  • Links the ~/.sbt to a layer for caching
  • If <APPLICATION_ROOT>/sbt exists
    • Runs <APPLICATION_ROOT>/sbt universal:packageBin to build the application
  • If <APPLICATION_ROOT>/sbt does not exist
    • Contributes SBT to a layer with all commands on $PATH
    • Runs <SBT_ROOT>/bin/sbt package to build the application
  • Removes the source code in <APPLICATION_ROOT>, following include/exclude rules
  • If $BP_SBT_BUILT_ARTIFACT matched a single file
    • Restores $BP_SBT_BUILT_ARTIFACT from the layer, expands the single file to <APPLICATION_ROOT>
  • If $BP_SBT_BUILT_ARTIFACT matched a directory or multiple files
    • Restores the files matched by $BP_SBT_BUILT_ARTIFACT to <APPLICATION_ROOT>


Environment Variable Description
$BP_SBT_BUILD_ARGUMENTS Configure the arguments to pass to build system. Defaults to universal:packageBin.
$BP_SBT_BUILT_MODULE Configure the module to find application artifact in. Defaults to the root module (empty).
$BP_SBT_BUILT_ARTIFACT Configure the built application artifact explicitly. Supersedes $BP_SBT_BUILT_MODULE. Defaults to target/universal/*.zip. Can match a single file, multiple files or a directory. Can be one or more space separated patterns.
$BP_SBT_REPOSITORIES_FILE Specifies a custom location to SBT's repositories file.
$BP_INCLUDE_FILES Colon separated list of glob patterns to match source files. Any matched file will be retained in the final image. Defaults to `` (i.e. nothing).
$BP_EXCLUDE_FILES Colon separated list of glob patterns to match source files. Any matched file will be specifically removed from the final image. If include patterns are also specified, then they are applied first and exclude patterns can be used to further reduce the fileset.


The buildpack optionally accepts the following bindings:

Type: dependency-mapping

Key Value Description
<dependency-digest> <uri> If needed, the buildpack will fetch the dependency with digest <dependency-digest> from <uri>


This buildpack is released under version 2.0 of the Apache License.