https://github.com/paketo-buildpacks/executable-jar

A Cloud Native Buildpack that contributes a Process Type for executable JARs.
https://github.com/paketo-buildpacks/executable-jar

cnb executable-jar hacktoberfest jvm-applications

Last synced: 18 days ago
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A Cloud Native Buildpack that contributes a Process Type for executable JARs.

• Host: GitHub
• URL: https://github.com/paketo-buildpacks/executable-jar
• Owner: paketo-buildpacks
• License: apache-2.0
• Created: 2020-03-10T22:50:03.000Z (almost 6 years ago)
• Default Branch: main
• Last Pushed: 2026-02-02T03:40:06.000Z (22 days ago)
• Last Synced: 2026-02-02T14:54:11.155Z (22 days ago)
• Topics: cnb, executable-jar, hacktoberfest, jvm-applications
• Language: Go
• Size: 589 KB
• Stars: 17
• Watchers: 8
• Forks: 7
• Open Issues: 7
• Metadata Files:
  • Readme: README.md
  • License: LICENSE
  • Codeowners: .github/CODEOWNERS
  • Notice: NOTICE

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README

          
# Paketo Buildpack for Executable Jar

## Buildpack ID: `paketo-buildpacks/executable-jar`

## Registry URLs: `docker.io/paketobuildpacks/executable-jar`

The Paketo Buildpack for Executable JAR is a Cloud Native Buildpack that contributes a Process Type for executable JARs.

## Behavior

This buildpack will participate if any the following conditions are met:

* `/META-INF/MANIFEST.MF` contains a `Main-Class` entry

* `/**/*.jar` exists and that JAR has a `/META-INF/MANIFEST.MF` file which contains a `Main-Class` entry

When building a JVM application the buildpack will do the following:

* Requests that a JRE be installed

* If `` contains an exploded JAR:

  * It contributes `` to build and runtime `$CLASSPATH`

  * If `/META-INF/MANIFEST.MF` `Class-Path` exists

    * Contributes entries to build and runtime `$CLASSPATH`

* Contributes `executable-jar`, `task`, and `web` process types

When participating in the build of a native image application the buildpack will:

* If `` contains an exploded JAR:

  * Contributes `` to build-time `$CLASSPATH`

  * If `/META-INF/MANIFEST.MF` `Class-Path` exists

    * Contributes entries to build-time `$CLASSPATH`

When `$BP_LIVE_RELOAD_ENABLE` is true:

* Requests that `watchexec` be installed

* Contributes `reload` process type

## Configuration

| Environment Variable          | Description                                                                                                                                                               |

|-------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

| `$BP_LIVE_RELOAD_ENABLED`     | Enable live process reloading. Defaults to false.                                                                                                                         |

| `$BP_EXECUTABLE_JAR_LOCATION` | An optional glob to specify the JAR used as an entrypoint. Defaults to "", which causes the buildpack to do a breadth-first search for the first executable JAR it finds. |

## License

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

[a]: http://www.apache.org/licenses/LICENSE-2.0