Jlink

Creates a Java Runtime image using jlink.

Cross platform Java runtime images may be created however you must ensure that all configured JDKs have the same matching major version.
You have to install additional JDKs to enable cross-platform images. JReleaser will not install these JDKs for you. You may configure the JDKs Maven Plugin or the JDKs Gradle Plugin to downloads JDKs.

Configuration

Legend:

  • required

  • optional

  • may use environment variable

  • accepts Name Templates

  • YAML

  • TOML

  • JSON

  • Maven

  • Gradle

# 
assemble:
  # 
  jlink:
    # Assemblers require a name.
    # 
    app:

      # Enables or disables the assembler.
      # Supported values are [`NEVER`, `ALWAYS`, `RELEASE`, `SNAPSHOT`].
      # Defaults to `NEVER`.
      #  
      active: ALWAYS

      # Export the assembled artifacts as a matching named distribution.
      # Defaults to `true`.
      # 
      exported: true

      # The stereotype of this assembler.
      # Supported values are [`NONE`, `CLI`, `DESKTOP`, `WEB`, `MOBILE`].
      # Defaults to `#{project.stereotype}`.
      # 
      stereotype: CLI

      # Additional properties used when evaluating templates.
      #  
      extraProperties:
        # Key will be capitalized and prefixed with `jlink`, i.e, `jlinkFoo`.
        foo: bar

      # 
      platform:
        # Key value pairs.
        # Keys match a full platform or an os.name, os.arch.
        # Same rules apply as in Platform.
        # 
        replacements:
          osx-x86_64: mac
          aarch_64: aarch64
          x86_64: amd64
          linux_musl: alpine

      # Name of the executable launcher.
      # If left undefined, will use `#{assembler.name}`.
      # 
      executable: app

      # Name of the generated image.
      # If left undefined, will use
      # `#{project.java.groupId}.#{project.java.artifactId}-#{project.version}`.
      # Generated artifacts always have the platform as suffix.
      #  
      imageName: 'app-{{projectVersion}}'

      # Name transformation of the generated image.
      # Transformed artifacts always have the platform as suffix.
      #  
      imageNameTransform: 'app-{{projectEffectiveVersion}}'

      # Archive format to use.
      # Supported values are [`ZIP`, `TAR`, `TAR_BZ2`, `TAR_GZ`, `TAR_XZ`, `TBZ2`, `TGZ`, `TXZ`].
      # Defaults to `ZIP`.
      # 
      archiveFormat: ZIP

      # List of module names.
      # Overrides modules found by jdeps.
      # Setting any values here automatically disables jdeps.
      # 
      moduleNames:
        - java.base
        - com.acme.demo

      # List of additional module names.
      # Additional required modules but not detected by jdeps.
      # 
      additionalModuleNames:
        - jdk.crypto.ec
        - jdk.localedata

      # List of JDKs for generating cross-platform images.
      #  
      targetJdks:
        - path: path/to/jdk
          platform: osx-x86_64
        - path: path/to/jdk
          platform: linux-x86_64

      # The JDK to use.
      # If undefined, will find a matching JDK.
      #  
      jdk:
        path: path/to/jdk
        platform: linux-x86_64

      # Configuration flags for Jdeps
      # 
      jdeps:
        # Enables or disables jdeps
        # If disabled then [`java.base`] is set as default value for `moduleNames`,
        # you may define an explicit value for `moduleNames` or use `additionalModuleNames`.
        # Defaults to `true`
        # 
        enabled: true

        # Specifies the version when processing multi-release jar files.
        # Value should be integer >= 9 or `base`.
        # Defaults to empty
        # 
        multiRelease: base

        # Ignore missing dependences.
        # Defaults to `false`
        # 
        ignoreMissingDeps: true

        # Use wildcard expression in classpath.
        # Defaults to `true`
        # 
        useWildcardInPath: false

        # JARs or classes used to limit the module search
        # Must be defined as paths.
        # Defaults to empty.
        #   
        targets:
          - out/classes/com/acme/Main.class

      # A list of build arguments.
      # Defaults are shown.
      # 
      args:
        - "--no-header-files"
        - "--no-man-pages"
        - "--compress=2"
        - "--strip-debug"

      # Copy main and input JARs into archive.
      # Defaults to `true`.
      # 
      copyJars: true

      # 
      options:
        # Timestamp to use for each entry.
        # Must follow ISO-8601 +HH:MM timezone offset.
        # Example: 2023-03-08T12:56:33.024578+01:00
        # Defaults to timestamp for latest git commit or current time.
        # 
        timestamp: '2020-01-01T00:00:00.000000+00:00'

        # Set longFileMode for tar archives.
        # Possible values are [`ERROR`, `GNU`, `POSIX`, `TRUNCATE`].
        # Defaults to `ERROR`.
        # 
        longFileMode: POSIX

        # Set bigNumberMode for tar archives.
        # Possible values are [`ERROR`, `GNU`, `POSIX`].
        # Defaults to `ERROR`.
        # 
        bigNumberMode: POSIX

      # The executable JAR that contains the application.
      #  
      mainJar:
        path: path/to/app.jar

      # Defines a list of additional JARs as globs.
      # 
      jars:
          # The pattern to use.
          # May use glob or regex pattern syntax.
          #  
        - pattern: path/to/**/*.jar

      # 
      java:
        # Name of main module (if any).
        # Define only if the application is modular.
        # 
        mainModule: com.acme.demo

        # The application's entry point.
        # If left undefined, will use `#{project.java.mainClass}`.
        # 
        mainClass: com.acme.Main

        # Maven coordinates: groupId.
        # If left undefined, will use `#{project.java.groupId}`.
        # 
        groupId: com.acme

        # Maven coordinates: artifactId.
        # If left undefined, will use `#{project.java.artifactId}`.
        # 
        artifactId: app

        # The minimum Java version required by consumers to run the application.
        # If left undefined, will use `#{project.java.version}`.
        # 
        version: 8

        # Identifies the project as being member of a multi-project build.
        # If left undefined, will use `#{project.java.multiProject}`.
        # 
        multiProject: false

        # Additional properties used when evaluating templates.
        # 
        extraProperties:
          # Key will be capitalized and prefixed with `java`, i.e, `javaFoo`.
          foo: bar


      # Directory with file templates used to prepare the assembler.
      # Defaults to `src/jreleaser/assemblers/#{distribution.name}/jlink`.
      # If specified, path must exist.
      # 
      templateDirectory: path/to/jlink/templates

      # List of template files to be skipped.
      # Value may be an exact match or a regex.
      # 
      skipTemplates:
        - README.md.tpl

      # Defines a list of additional files as artifacts.
      # These files will be added to the assembled archive.
      #  
      artifacts:
        - path: path/to/file
        - path: path/to/another_file
          transform: path/inside/archive
        - path: path/to/platform/specific/file
          platform: osx-x86_64

      # Defines a list of additional files as globs.
      # These files will be added to the assembled archive.
      # 
      files:
          # The pattern to use.
          # May use glob or regex pattern syntax.
          #  
        - pattern: path/to/**/*.txt

      # Defines a list of additional files as filesets.
      # These files will be added to the assembled archive.
      # 
      fileSets:
          # The input directory to copy files from.
          #  
        - input: path/to/input/directory

          # The target path inside the archive.
          # If left undefined, defaults to the root of the archive.
          #  
          output: path/to/archive/entry

          # Fail if the given `input` does not exist.
          # Defaults to `true`.
          # 
          failOnMissingInput: false

          # A set of files and directory to include.
          #  
          includes:
            - 'name_or_regex'

          # A set of files and directory to exclude.
          #  
          excludes:
            - 'name_or_regex'

          # Additional properties used when evaluating templates.
          #  
          extraProperties:
            # Key will be capitalized and prefixed with `artifact`, i.e, `artifactFoo`.
            foo: bar
# Assemblers require a name.
# 
[assemble.jlink.app]

  # Enables or disables the assembler.
  # Supported values are [`NEVER`, `ALWAYS`, `RELEASE`, `SNAPSHOT`].
  # Defaults to `NEVER`.
  #  
  active = "ALWAYS"

  # Export the assembled artifacts as a matching named distribution.
  # Defaults to `true`.
  # 
  exported = true

  # The stereotype of this assembler.
  # Supported values are [`NONE`, `CLI`, `DESKTOP`, `WEB`, `MOBILE`].
  # Defaults to `#{project.stereotype}`.
  # 
  stereotype = "CLI"

  # Additional properties used when evaluating templates.
  #  
  extraProperties.foo = "bar"
  # Key will be capitalized and prefixed with `jlink`, i.e, `jlinkFoo`.

  # Key value pairs.
  # Keys match a full platform or an os.name, os.arch.
  # Same rules apply as in Platform.
  # 
  [assemble.jlink.app.platform.replacements]
    osx-x86_64 = "mac"
    aarch_64 = "aarch64"
    x86_64 = "amd64"
    linux_musl = "alpine"

  # Name of the executable launcher.
  # If left undefined, will use `#{assembler.name}`.
  # 
  executable = "app"

  # Name of the generated image.
  # If left undefined, will use
  # `#{project.java.groupId}.#{project.java.artifactId}-#{project.version}`.
  # Generated artifacts always have the platform as suffix.
  #  
  imageName = "app-{{projectVersion}}"

  # Name transformation of the generated image.
  # Transformed artifacts always have the platform as suffix.
  #  
  imageNameTransform = "app-{{projectEffectiveVersion}}"

  # Archive format to use.
  # Supported values are [`ZIP`, `TAR`, `TAR_BZ2`, `TAR_GZ`, `TAR_XZ`, `TBZ2`, `TGZ`, `TXZ`].
  # Defaults to `ZIP`.
  # 
  archiveFormat = "ZIP"

  # List of module names.
  # Overrides modules found by jdeps.
  # Setting any values here automatically disables jdeps.
  # 
  moduleNames = [
    "java.base",
    "com.acme.demo"]

  # List of additional module names.
  # Additional required modules but not detected by jdeps.
  # 
  additionalModuleNames = [
    "jdk.crypto.ec",
    "jdk.localedata"]

  # List of JDKs for generating cross-platform images.
  #  
  targetJdks = [
    { path = "path/to/jdk", platform = "osx-x86_64" },
    { path = "path/to/jdk", platform = "linux-x86_64" }]

  # The JDK to use.
  # If undefined, will find a matching JDK.
  #  
  jdk = { path = "path/to/jdk", platform = "linux-x86_64" }

  # Configuration flags for Jdeps
  # 

  # Enables or disables jdeps
  # If disabled then [`java.base`] is set as default value for `moduleNames`,
  # you may define an explicit value for `moduleNames` or use `additionalModuleNames`.
  # Defaults to `true`
  # 
  jdeps.enabled = true

  # Specifies the version when processing multi-release jar files.
  # Value should be integer >= 9 or `base`.
  # Defaults to empty
  # 
  jdeps.multiRelease = 'base'

  # Ignore missing dependences.
  # Defaults to `false`
  # 
  jdeps.ignoreMissingDeps = true

  # Use wildcard expression in classpath.
  # Defaults to `true`
  # 
  jdeps.useWildcardInPath = false

  # JARs or classes used to limit the module search
  # Must be defined as paths.
  # Defaults to empty.
  #   
  jdeps.targets = [ "out/classes/com/acme/Main.class" ]

  # A list of build arguments.
  # Defaults are shown
  # 
  args = ["--no-header-files",
    "--no-man-pages",
    "--compress=2",
    "--strip-debug"]

  # Copy main and input JARs into archive.
  # Defaults to `true`.
  # 
  copyJars = true

  # Timestamp to use for each entry.
  # Must follow ISO-8601 +HH:MM timezone offset.
  # Example: 2023-03-08T12:56:33.024578+01:00
  # Defaults to timestamp for latest git commit or current time.
  # 
  options.timestamp = "2020-01-01T00:00:00.000000+00:00"

  # Set longFileMode for tar archives.
  # Possible values are [`ERROR`, `GNU`, `POSIX`, `TRUNCATE`].
  # Defaults to `ERROR`.
  # 
  options.longFileMode = "POSIX"

  # Set bigNumberMode for tar archives.
  # Possible values are [`ERROR`, `GNU`, `POSIX`].
  # Defaults to `ERROR`.
  # 
  options.bigNumberMode = "POSIX"

  # The executable JAR that contains the application.
  #  
  mainJar = { path = "path/to/app.jar" }

  # Defines a list of additional JARs as globs.
  # 
  [[assemble.jlink.app.jars]]
    # The pattern to use.
    # May use glob or regex pattern syntax.
    #  
    pattern = "path/to/**/*.jar"

  # Name of main module (if any).
  # Define only if the application is modular.
  # 
  java.mainModule = "com.acme.demo"

  # The application's entry point.
  # If left undefined, will use `#{project.java.mainClass}`.
  # 
  java.mainClass = "com.acme.Main"

  # Maven coordinates: groupId.
  # If left undefined, will use `#{project.java.groupId}`.
  # 
  java.groupId = "com.acme"

  # Maven coordinates: artifactId.
  # If left undefined, will use `#{project.java.artifactId}`.
  # 
  java.artifactId = "app"

  # The minimum Java version required by consumers to run the application.
  # If left undefined, will use `#{project.java.version}`.
  # 
  java.version = "8"

  # Identifies the project as being member of a multi-project build.
  # If left undefined, will use `#{project.java.multiProject}`.
  # 
  java.multiProject = false

  # Additional properties used when evaluating templates.
  # 
  java.extraProperties.foo = "bar"
  # Key will be capitalized and prefixed with `java`, i.e, `javaFoo`.

  # Directory with file templates used to prepare the assembler.
  # Defaults to `src/jreleaser/assemblers/#{distribution.name}/jlink`.
  # If specified, path must exist.
  # 
  templateDirectory = "path/to/jlink/templates"

  # List of template files to be skipped.
  # Value may be an exact match or a regex.
  # 
  skipTemplates = [ "README.md.tpl" ]

  # Defines a list of additional files as artifacts.
  # These files will be added to the assembled archive.
  #  
  [[assemble.jlink.app.artifacts]]
    path = "path/to/file"
  [[assemble.jlink.app.artifacts]]
    path = "path/to/another_file"
    transform = "path/inside/archive"
  [[assemble.jlink.app.artifacts]]
    path = "path/to/platform/specific/file"
    platform = "osx-x86_64"

  # Defines a list of additional files as globs.
  # These files will be added to the assembled archive.
  # 
  [[assemble.jlink.app.files]]
    # The pattern to use.
    # May use glob or regex pattern syntax.
    #  
    pattern = "path/to/**/*.txt"

  # Defines a list of additional files as filesets.
  # These files will be added to the assembled archive.
  # 
  [[assemble.jlink.app.fileSets]]
    # The input directory to copy files from.
    #  
    input = "path/to/input/directory"

    # The target path inside the archive.
    # If left undefined, defaults to the root of the archive.
    #  
    output = "path/to/archive/entry"

    # Fail if the given `input` does not exist.
    # Defaults to `true`.
    # 
    failOnMissingInput = false

    # A set of files and directory to include.
    #  
    includes = ["name_or_regex"]

    # A set of files and directory to exclude.
    #  
    excludes = ["name_or_regex"]

    # Additional properties used when evaluating templates.
    #  
    [[assemble.jlink.app.fileSets.extraProperties]]
      # Key will be capitalized and prefixed with `artifact`, i.e, `artifactFoo`.
      foo: bar
{
  // 
  "assemble": {
    // 
    "jlink": {
      // Assemblers require a name.
      // 
      "app": {

        // Enables or disables the assembler.
        // Supported values are [`NEVER`, `ALWAYS`, `RELEASE`, `SNAPSHOT`].
        // Defaults to `NEVER`.
        //  
        "active": "ALWAYS",

        // Export the assembled artifacts as a matching named distribution.
        // Defaults to `true`.
        // 
        "exported": true,

        // The stereotype of this assembler.
        // Supported values are [`NONE`, `CLI`, `DESKTOP`, `WEB`, `MOBILE`].
        // Defaults to `#{project.stereotype}`.
        // 
        "stereotype": "CLI",

        // Additional properties used when evaluating templates.
        //  
        "extraProperties": {
          // Key will be capitalized and prefixed with `jlink`, i.e, `jlinkFoo`.
          "foo": "bar"
        },

        // 
        platform: {
          // Key value pairs.
          // Keys match a full platform or an os.name, os.arch.
          // Same rules apply as in Platform.
          // 
          "replacements": {
            "osx-x86_64": "mac",
            "aarch_64": "aarch64",
            "x86_64": "amd64",
            "linux_musl": "alpine"
          }
        },

        // Name of the executable launcher.
        // If left undefined, will use `#{assembler.name}`.
        // 
        "executable": "app",

        // Name of the generated image.
        // If left undefined, will use
        // `#{project.java.groupId}.#{project.java.artifactId}-#{project.version}`.
        // Generated artifacts always have the platform as suffix.
        //  
        "imageName": "app-{{projectVersion}}",

        // Name transformation of the generated image.
        // Transformed artifacts always have the platform as suffix.
        //  
        "imageNameTransform": "app-{{projectEffectiveVersion}}",

        // Archive format to use.
        // Supported values are [`ZIP`, `TAR`, `TAR_BZ2`, `TAR_GZ`, `TAR_XZ`, `TBZ2`, `TGZ`, `TXZ`].
        // Defaults to `ZIP`.
        // 
        "archiveFormat": "ZIP",

        // List of module names.
        // Overrides modules found by jdeps.
        // Setting any values here automatically disables jdeps.
        // 
        "moduleNames": [
           "java.base",
           "com.acme.demo"
        ],

        // List of additional module names.
        // Additional required modules but not detected by jdeps.
        // 
        "additionalModuleNames": [
          "jdk.crypto.ec",
          "jdk.localedata"
        ],

        // List of JDKs for generating cross-platform images.
        //  
        "targetJdks": [
          {
            "path": "path/to/jdk",
            "platform": "osx-x86_64"
          },
          {
            "path": "path/to/jdk",
            "platform": "linux-x86_64"
          }
        ],

        // The JDK to use.
        // If undefined, will find a matching JDK.
        //  
        "jdk": {
          "path": "path/to/jdk",
          "platform": "linux-x86_64"
        },

        // Configuration flags for Jdeps
        // 
        "jdeps": {
          // Enables or disables jdeps
          // If disabled then [`java.base`] is set as default value for `moduleNames`,
          // you may define an explicit value for `moduleNames` or use `additionalModuleNames`.
          // Defaults to `true`
          // 
          "enabled": true,

          // Specifies the version when processing multi-release jar files.
          // Value should be integer >= 9 or `base`.
          // Defaults to empty
          // 
          "multiRelease": "base",

          // Ignore missing dependences.
          // Defaults to `false`
          // 
          "ignoreMissingDeps": true,

          // Use wildcard expression in classpath.
          // Defaults to `true`
          // 
          "useWildcardInPath": false,

          // JARs or classes used to limit the module search
          // Must be defined as paths.
          // Defaults to empty.
          //   
          "targets": [
            "out/classes/com/acme/Main.class"
          ]
        },

        // A list of build arguments.
        // Defaults are shown.
        // 
        "args": [
          "--no-header-files",
          "--no-man-pages",
          "--compress=2",
          "--strip-debug"
        ],

        // Copy main and input JARs into archive.
        // Defaults to `true`.
        // 
        "copyJars": true,

        // 
        "options": {
          // Timestamp to use for each entry.
          // Must follow ISO-8601 +HH:MM timezone offset.
          // Example: 2023-03-08T12:56:33.024578+01:00
          // Defaults to timestamp for latest git commit or current time.
          // 
          "timestamp": "2020-01-01T00:00:00.000000+00:00",

          // Set longFileMode for tar archives.
          // Possible values are [`ERROR`, `GNU`, `POSIX`, `TRUNCATE`].
          // Defaults to `ERROR`.
          // 
          "longFileMode": "POSIX",

          // Set bigNumberMode for tar archives.
          // Possible values are [`ERROR`, `GNU`, `POSIX`].
          // Defaults to `ERROR`.
          // 
          "bigNumberMode": "POSIX"
        },

        // The executable JAR that contains the application.
        //  
        "mainJar": {
          "path": "path/to/app.jar"
        },

        // Defines a list of additional JARs as globs.
        // 
        "jars": [
          {
            // The pattern to use.
            // May use glob or regex pattern syntax.
            //  
            "pattern": "path/to/**/*.jar"
          }
        ],

        // 
        "java": {
          // Name of main module (if any).
          // Define only if the application is modular.
          // 
          "mainModule": "com.acme.demo",

          // The application's entry point.
          // If left undefined, will use `#{project.java.mainClass}`.
          // 
          "mainClass": "com.acme.Main",

          // Maven coordinates: groupId.
          // If left undefined, will use `#{project.java.groupId}`.
          // 
          "groupId": "com.acme",

          // Maven coordinates: artifactId.
          // If left undefined, will use `#{project.java.artifactId}`.
          // 
          "artifactId": "app",

          // The minimum Java version required by consumers to run the application.
          // If left undefined, will use `#{project.java.version}`.
          // 
          "version": "8",

          // Identifies the project as being member of a multi-project build.
          // If left undefined, will use `#{project.java.multiProject}`.
          // 
          "multiProject": false,

          // Additional properties used when evaluating templates.
          // 
          "extraProperties": {
            // Key will be capitalized and prefixed with `java`, i.e, `javaFoo`.
            "foo": "bar"
          }
        },

        // Directory with file templates used to prepare the assembler.
        // Defaults to `src/jreleaser/assemblers/#$#{distribution.name}/jlink`.
        // If specified, path must exist.
        // 
        "templateDirectory": "path/to/jlink/templates",

        // List of template files to be skipped.
        // Value may be an exact match or a regex.
        // 
        "skipTemplates": [
          "README.md.tpl"
        ],

        // Defines a list of additional files as artifacts.
        // These files will be added to the assembled archive.
        //  
        "artifacts": [
          {
            "path": "path/to/file"
          },
          {
            "path": "path/to/another_file",
            "transform": "path/inside/archive"
          },
          {
            "path": "path/to/platform/specific/file",
            "platform": "osx-x86_64"
          }
        ]  ,

        // Defines a list of additional files as globs.
        // These files will be added to the assembled archive.
        // 
        "files": [
          {
            // The pattern to use.
            // May use glob or regex pattern syntax.
            //  
            "pattern": "path/to/**/*.txt"
          }
        ],

        // Defines a list of additional files as filesets.
        // These files will be added to the assembled archive.
        // 
        "fileSets": [
          {
            // The input directory to copy files from.
            //  
            "input": "path/to/input/directory",

            // The target path inside the archive.
            // If left undefined, defaults to the root of the archive.
            //  
            "output": "path/to/archive/entry",

            // Fail if the given `input` does not exist.
            // Defaults to `true`.
            // 
            "failOnMissingInput": false,

            // A set of files and directory to include.
            //  
            "includes": ["name_or_regex"],

            // A set of files and directory to exclude.
            //  
            "excludes": ["name_or_regex"],

            // Additional properties used when evaluating templates.
            //  
            "extraProperties": {
              // Key will be capitalized and prefixed with `artifact`, i.e, `artifactFoo`.
              "foo": "bar"
            }
          }
        ]
      }
    }
  }
}
<jreleaser>
  <!--
    
  -->
  <assemble>
    <!--
      
    -->
    <jlink>
      <!--
        Assemblers require a name.
        
      -->
      <app>
        <!--
          Enables or disables the distribution.
          Supported values are [`NEVER`, `ALWAYS`, `RELEASE`, `SNAPSHOT`].
          Defaults to `ALWAYS`.
           
        -->
        <active>ALWAYS</active>

        <!--
          Export the assembled artifacts as a matching named distribution.
          Defaults to `true`.
          
        -->
        <exported>true</exported>

        <!--
          The stereotype of this assembler.
          Supported values are [`NONE`, `CLI`, `DESKTOP`, `WEB`, `MOBILE`].
          Defaults to `#{project.stereotype}`.
          
        -->
        <stereotype>CLI</stereotype>

        <!--
          Additional properties used when evaluating templates.
           
        -->
        <extraProperties>
          <!--
            Key will be capitalized and prefixed with `jlink`, i.e, `jlinkFoo`.
          -->
          <foo>bar</foo>
        </extraProperties>

        <!--
          
        -->
        <platform>

          <!--
            Key value pairs.
            Keys match a full platform or an os.name, os.arch.
            Same rules apply as in Platform.
            
          -->
          <replacements>
            <osx-x86_64>mac</osx-x86_64>
            <aarch_64>aarch64</aarch_64>
            <x86_64>amd64</x86_64>
            <linux_musl>alpine</linux_musl>
          </replacements>
        </platform>

        <!--
          Name of the executable launcher.
          If left undefined, will use `#{distribution.name}`.
          
        -->
        <executable>app</executable>

        <!--
          Name of the generated image.
          If left undefined, will use
          `#{project.java.groupId}.#{project.java.artifactId}-#{project.version}`.
          Generated artifacts always have the platform as suffix.
           
        -->
        <imageName>app-{{projectVersion}}</imageName>

        <!--
          Name transformation of the generated image.
          Transformed artifacts always have the platform as suffix.
           
        -->
        <imageNameTransform>app</imageNameTransform>

        <!--
          Archive format to use.
          Supported values are [`ZIP`, `TAR`, `TAR_BZ2`, `TAR_GZ`, `TAR_XZ`, `TBZ2`, `TGZ`, `TXZ`].
          Defaults to `ZIP`.
          
        -->
        <archiveFormat>ZIP</archiveFormat>

        <!--
          List of module names.
          Overrides modules found by jdeps.
          Setting any values here automatically disables jdeps.
          
        -->
        <moduleNames>
          <moduleName>java.base</moduleName>
          <moduleName>com.acme.demo</moduleName>
        </moduleNames>

        <!--
          List of additional module names.
          Additional required modules but not detected by jdeps.
          
        -->
        <additionalModuleNames>
          <additionalModuleName>jdk.crypto.ec</additionalModuleName>
          <additionalModuleName>jdk.localedata</additionalModuleName>
        </additionalModuleNames>

        <!--
          List of JDKs for generating cross-platform images.
           
        -->
        <targetJdks>
          <targetJdk>
            <path>path/to/jdk</path>
            <platform>osx-x86_64</platform>
          </targetJdk>
          <targetJdk>
            <path>path/to/jdk</path>
            <platform>linux-x86_64</platform>
          </targetJdk>
        </targetJdks>

        <!--
          The JDK to use.
          If undefined, will find a matching JDK.
           
        -->
        <jdk>
          <path>path/to/jdk</path>
          <platform>linux-x86_64</platform>
        </jdk>

        <!--
          Configuration flags for Jdeps
          
        -->
        <jdeps>
          <!--
            Enables or disables jdeps
            If disabled then [`java.base`] is set as default value for `moduleNames`,
            you may define an explicit value for `moduleNames` or use `additionalModuleNames`.
            Defaults to `true`
            
          -->
          <enabled>true</enabled>

          <!--
            Specifies the version when processing multi-release jar files.
            Value should be integer >= 9 or `base`.
            Defaults to empty
            
          -->
          <multiRelease>base</multiRelease>

          <!--
            Ignore missing dependences.
            Defaults to `false`
            
          -->
          <ignoreMissingDeps>true</ignoreMissingDeps>

          <!--
            Use wildcard expression in classpath.
            Defaults to `true`
            
          -->
          <useWildcardInPath>false</useWildcardInPath>

          <!--
            JARs or classes used to limit the module search
            Must be defined as paths.
            Defaults to empty.
              
          -->
          <targets>
            <target>${project.build.directory}/classes/com/acme/Main.class</target>
          </targets>
        </jdeps>

        <!--
          A list of build arguments.
          Defaults are shown.
          
        -->
        <args>
          <arg>--no-header-files</arg>
          <arg>--no-man-pages</arg>
          <arg>--compress=2</arg>
          <arg>--strip-debug</arg>
        </args>

        <!--
          Copy main and input JARs into archive.
          Defaults to `true`.
          
        -->
        <copyJars>true</copyJars>

        <!--
          
        -->
        <options>
          <!--
            Timestamp to use for each entry.
            Must follow ISO-8601 +HH:MM timezone offset.
            Example: 2023-03-08T12:56:33.024578+01:00
            Defaults to timestamp for latest git commit or current time.
            
          -->
          <timestamp>2020-01-01T00:00:00.000000+00:00</timestamp>

          <!--
            Set longFileMode for tar archives.
            Possible values are [`ERROR`, `GNU`, `POSIX`, `TRUNCATE`].
            Defaults to `ERROR`.
            
          -->
          <longFileMode>POSIX</longFileMode>

          <!--
            Set bigNumberMode for tar archives.
            Possible values are [`ERROR`, `GNU`, `POSIX`].
            Defaults to `ERROR`.
            
          -->
          <bigNumberMode>POSIX</bigNumberMode>
        </options>

        <!--
          The executable JAR that contains the application.
           
        -->
        <mainJar>
          <path>path/to/app.jar</path>
        </mainJar>

        <!--
          Defines a list of additional JARs as globs.
          
        -->
        <jars>
          <jar>
            <!--
              The pattern to use.
              May use glob or regex pattern syntax.
               
            -->
            <pattern>path/to/**/*.jar</pattern>
          </jar>
        </jars>

        <!--
          
        -->
        <java>
          <!--
            Name of main module (if any).
            Define only if the application is modular.
            
          -->
          <mainModule>com.acme.demo</mainModule>

          <!--
            The application's entry point.
            If left undefined, will use `#{project.java.mainClass}`.
            
          -->
          <mainClass>com.acme.Main</mainClass>

          <!--
            Maven coordinates>groupId.
            If left undefined, will use `#{project.java.groupId}`.
            
          -->
          <groupId>com.acme</groupId>

          <!--
            Maven coordinates>artifactId.
            If left undefined, will use `#{project.java.artifactId}`.
            
          -->
          <artifactId>app</artifactId>

          <!--
            The minimum Java version required by consumers to run the application.
            If left undefined, will use `#{project.java.version}`.
            
          -->
          <version>8</version>

          <!--
            Identifies the project as being member of a multi-project build.
            If left undefined, will use `#{project.java.multiProject}`.
            
          -->
          <multiProject>false</multiProject>

          <!--
            Additional properties used when evaluating templates.
            
          -->
          <extraProperties>
            <!--
              Key will be capitalized and prefixed with `java`, i.e, `javaFoo`.
            -->
            <foo>bar</foo>
          </extraProperties>
        </java>

        <!--
          Directory with file templates used to prepare the assembler.
          Defaults to `src/jreleaser/assemblers/#{distribution.name}/jlink`.
          If specified, path must exist.
          
        -->
        <templateDirectory>path/to/jlink/templates</templateDirectory>

        <!--
          List of template files to be skipped.
          Value may be an exact match or a regex.
          
        -->
        <skipTemplates>
          <skipTemplate>README.md.tpl</skipTemplate>
        </skipTemplates>

        <!--
          Defines a list of additional files as artifacts.
          These files will be added to the assembled archive.
           
        -->
        <artifacts>
          <artifact>
            <path>path/to/file</path>
          </artifact>
          <artifact>
            <path>path/to/another_file</path>
            <transform>path/inside/archive</transform>
          </artifact>
          <artifact>
            <path>path/to/platform/specific/file</path>
            <platform>osx-x86_64</platform>
          </artifact>
        </artifacts>

        <!--
          Defines a list of additional files as globs.
          These files will be added to the assembled archive.
          
        -->
        <files>
          <file>
            <!--
              The pattern to use.
              May use glob or regex pattern syntax.
               
            -->
            <pattern>path/to/**/*.txt</pattern>
          </file>
        </files>

        <!--
          Defines a list of additional files as filesets.
          These files will be added to the assembled archive.
          
        -->
        <fileSets>
          <fileSet>
            <!--
              The input directory to copy files from.
               
            -->
            <input>path/to/input/directory</input>

            <!--
              The target path inside the archive.
              If left undefined, defaults to the root of the archive.
               
            -->
            <output>path/to/archive/entry</output>

            <!--
              Fail if the given `input` does not exist.
              Defaults to `true`.
              
            -->
            <failOnMissingInput>false</failOnMissingInput>

            <!--
              A set of files and directory to include.
               
            -->
            <includes>
              <include>name_or_regex</include>
            </includes>

            <!--
              A set of files and directory to exclude.
               
            -->
            <excludes>
              <exclude>name_or_regex</exclude>
            </excludes>

            <!--
              Additional properties used when evaluating templates.
              
            -->
            <extraProperties>
              <!--
                Key will be capitalized and prefixed with `artifact`, i.e, `artifactFoo`.
              -->
              <foo>bar</foo>
            </extraProperties>
          </fileSet>
        </fileSets>
      </app>
    </jlink>
  </assemble>
</jreleaser>
jreleaser {
  // 
  assemble {
    // 
    jlink {
      // Assemblers require a name.
      // 
      app {

        // Enables or disables the assembler.
        // Supported values are [`NEVER`, `ALWAYS`, `RELEASE`, `SNAPSHOT`].
        // Defaults to `NEVER`.
        //  
        active = 'ALWAYS'

        // Export the assembled artifacts as a matching named distribution.
        // Defaults to `true`.
        // 
        exported = true

        // The stereotype of this assembler.
        // Supported values are [`NONE`, `CLI`, `DESKTOP`, `WEB`, `MOBILE`].
        // Defaults to `#{project.stereotype}`.
        // 
        stereotype = 'CLI'

        // Additional properties used when evaluating templates.
        // Key will be capitalized and prefixed with `jlink`, i.e, `jlinkFoo`.
        //  
        extraProperties.put('foo', 'bar')

        // 
        platform {

          // Key value pairs.
          // Keys match a full platform or an os.name, os.arch.
          // Same rules apply as in Platform.
          // 
          replacements = [
            'osx-x86_64': 'mac',
            aarch_64: 'aarch64',
            x86_64: 'amd64',
            linux_musl: 'alpine'
          ]
        }

        // Name of the executable launcher.
        // If left undefined, will use `#{assembler.name}`.
        // 
        executable = 'app'

        // Name of the generated image.
        // If left undefined, will use
        // `#{project.java.groupId}.#{project.java.artifactId}-#{project.version}`.
        // Generated artifacts always have the platform as suffix.
        //  
        imageName = 'app-{{projectVersion}}'

        // Name transformation of the generated image.
        // Transformed artifacts always have the platform as suffix.
        //  
        imageNameTransform = 'app-{{projectEffectiveVersion}}'

        // Archive format to use.
        // Supported values are [`ZIP`, `TAR`, `TAR_BZ2`, `TAR_GZ`, `TAR_XZ`, `TBZ2`, `TGZ`, `TXZ`].
        // Defaults to `ZIP`.
        // 
        archiveFormat = 'ZIP'

        // List of module names.
        // Overrides modules found by jdeps.
        // Setting any values here automatically disables jdeps.
        // 
        moduleNames = [
            'java.base',
            'com.acme.demo'
        ]

        // List of additional module names.
        // Additional required modules but not detected by jdeps.
        // 
        additionalModuleNames = [
          'jdk.crypto.ec',
          'jdk.localedata'
        ]

        // List of JDKs for generating cross-platform images.
        //  
        targetJdk {
          path = 'path/to/jdk'
          platform = 'osx-x86_64'
        }
        targetJdk {
          path = 'path/to/jdk'
          platform = 'linux-x86_64'
        }

        // The JDK to use.
        // If undefined, will find a matching JDK.
        //  
        jdk {
          path = 'path/to/jdk'
          platform = 'linux-x86_64'
        }

        // Configuration flags for Jdeps
        // 
        jdeps {
          // Enables or disables jdeps
          // If disabled then [`java.base`] is set as default value for `moduleNames`,
          // you may define an explicit value for `moduleNames` or use `additionalModuleNames`.
          // Defaults to `true`
          // 
          enabled = true

          // Specifies the version when processing multi-release jar files.
          // Value should be integer >= 9 or `base`.
          // Defaults to empty
          // 
          multiRelease = 'base'

          // Ignore missing dependences.
          // Defaults to `false`
          // 
          ignoreMissingDeps = true

          // Use wildcard expression in classpath.
          // Defaults to `true`
          // 
          useWildcardInPath = false

          // JARs or classes used to limit the module search
          // Must be defined as paths.
          // Defaults to empty.
          //   
          targets = [ 'build/classes/com/acme/Main.class' ]
        }

        // A list of build arguments.
        // Defaults are shown.
        // 
        arg('--install-exit-handlers')
        arg('--no-header-files')
        arg('--no-man-pages')
        arg('--compress=2')
        arg('--strip-debug')

        // Copy main and input JARs into archive.
        // Defaults to `true`.
        // 
        copyJars = true

        // 
        options {
          // Timestamp to use for each entry.
          // Must follow ISO-8601 + timezone offset.
          // Example: 2023-03-08T12:56:33.024578+01:00
          // Defaults to timestamp for latest git commit or current time.
          // 
          timestamp = '2020-01-01T00:00:00.000000+00:00'

          // Set longFileMode for tar archives.
          // Possible values are [`ERROR`, `GNU`, `POSIX`, `TRUNCATE`].
          // Defaults to `ERROR`.
          // 
          longFileMode = 'POSIX'

          // Set bigNumberMode for tar archives.
          // Possible values are [`ERROR`, `GNU`, `POSIX`].
          // Defaults to `ERROR`.
          // 
          bigNumberMode = 'POSIX'
        }

        // The executable JAR that contains the application.
        //  
        mainJar {
          path = 'path/to/app.jar'
        }

        // Defines a list of additional JARs as globs.
        // 
        jars {
          // The pattern to use.
          // May use glob or regex pattern syntax.
          //  
          pattern = 'path/to/**/*.jar'
        }

        // 
        java {
          // Name of main module (if any).
          // Define only if the application is modular.
          // 
          mainModule = 'com.acme.demo'

          // The application's entry point.
          // If left undefined, will use `#{project.java.mainClass}`.
          // 
          mainClass = 'com.acme.Main'

          // Maven coordinates = groupId.
          // If left undefined, will use `#{project.java.groupId}`.
          // 
          groupId = 'com.acme'

          // Maven coordinates = artifactId.
          // If left undefined, will use `#{project.java.artifactId}`.
          // 
          artifactId = 'app'

          // The minimum Java version required by consumers to run the application.
          // If left undefined, will use `#{project.java.version}`.
          // 
          version = '8'

          // Identifies the project as being member of a multi-project build.
          // If left undefined, will use `#{project.java.multiProject}`.
          // 
          multiProject = false

          // Additional properties used when evaluating templates.
          // Key will be capitalized and prefixed with `java`, i.e, `javaFoo`.
          // 
          extraProperties.put('foo', 'bar')
        }

        // Directory with file templates used to prepare the assembler.
        // Defaults to `src/jreleaser/assemblers/#{distribution.name}/jlink`.
        // If specified, path must exist.
        // 
        templateDirectory = 'path/to/jlink/templates'

        // List of template files to be skipped.
        // Value may be an exact match or a regex.
        // 
        skipTemplate('README.md.tpl')

        // Defines a list of additional files as artifacts.
        // These files will be added to the assembled archive.
        //  
        artifact {
          path = 'path/to/file'
        }
        artifact {
          path = 'path/to/another_file'
          transform = 'path/inside/archive'
        }
        artifact {
          path = 'path/to/platform/specific/file'
          platform = 'osx-x86_64'
        }

        // Defines a list of additional files as globs.
        // These files will be added to the assembled archive.
        // 
        files {
          // The pattern to use.
          // May use glob or regex pattern syntax.
          //  
          pattern = 'path/to/**/*.txt'
        }

        // Defines a list of additional files as filesets.
        // These files will be added to the assembled archive.
        // 
        fileSet {
          // The input directory to copy files from.
          //  
          input = 'path/to/input/directory'

          // The target path inside the archive.
          // If left undefined, defaults to the root of the archive.
          //  
          output = 'path/to/archive/entry'

          // Fail if the given `input` does not exist.
          // Defaults to `true`.
          // 
          failOnMissingInput = false

          // A set of files and directory to include.
          //  
          includes = ['name_or_regex']

          // A set of files and directory to exclude.
          //  
          excludes = ['name_or_regex']

          // Additional properties used when evaluating templates.
          // Key will be capitalized and prefixed with `artifact`, i.e, `artifactFoo`.
          //  
          extraProperties.put('foo', 'bar')
        }
      }
    }
  }
}

Environment

When not explicitly set, the value of the following properties may be resolved from an environment variable or a system property as shown in the table. The system property takes precedence over the environment variable.

System Property Environment Variable

active

jreleaser.assemble.jlink.${name}.active
jreleaser.assemble.jlink.active

JRELEASER_ASSEMBLE_JLINK_${name}_ACTIVE
JRELEASER_ASSEMBLE_JLINK_ACTIVE

Archive Format

By default all archives use the Zip format, however you may change this by setting and extra property named archiveFormat on a given targetJdk. the Jlink assembler will use it as a hint to select the appropriate archiving format, for example here’s how the format may be changed for archives that target Linux platforms:

assemble:
  jlink:
    app:
      active: ALWAYS
      targetJdks:
        - path: '{{jdkPathPrefix}}/zulu17Osx/{{jdkFilePrefix}}-macosx_x64/zulu-17.jdk/Contents/Home'
          platform: 'osx-x86_64'
        - path: '{{jdkPathPrefix}}/zulu17Linux/{{jdkFilePrefix}}-linux_x64'
          platform: 'linux-x86_64'
          extraProperties:
            archiveFormat: TGZ
        - path: '{{jdkPathPrefix}}/zulu17LinuxMusl/{{jdkFilePrefix}}-linux_musl_x64'
          platform: 'linux_musl-x86_64'
          extraProperties:
            archiveFormat: TGZ
        - path: '{{jdkPathPrefix}}/zulu17Windows/{{jdkFilePrefix}}-win_x64'
          platform: 'windows-x86_64'

Supported values for the archiveFormat property are [ZIP, TAR, TAR_BZ2, TAR_GZ, TAR_XZ, TBZ2, TGZ, TXZ], with ZIP being the default if left unspecified.

Substitute ${name} for the value of the named instance.

Space (' '), underscore (_), and dash (-) will be replaced by dot (.) to separate tokens in the System property. Space (' '), dash (-), and dot (.) will be replaced by underscore (_) to separate tokens in the environment variable, such that:

${name} System Property Environment Variable

foobar

foobar

FOOBAR

fooBar

foobar

FOOBAR

foo bar

foo.bar

FOO_BAR

foo-bar

foo.bar

FOO_BAR

foo_bar

foo.bar

FOO_BAR

foo.bar

foo.bar

FOO_BAR

JDKs

You may specify a value for both jdk and targetJdks, either, or none. The following rules apply when resolving which JDKs will be used to generate custom Java runtimes:

  1. If both jdk and targetJdks are specified then they must match the same major version.

  2. If only jdk is specified then the targetJdks will contain a single entry matching the given jdk.

  3. If no jdk is specified then a matching JDK will be searched in targetJdks.

  4. If no match is found in rule #3 then the currently executing JDK will be used leading to the same result as rule #2.

Paths for jdk and targetJdks must exist in the file system. You may use the maven jdks-maven-plugin or gradle jdks-gradle-plugin to download required JDKs.

Templates

The default location for templates is:

src/jreleaser/assemblers/<distribution-name>/jlink

The following list shows the filenames that may be used to override default templates:

  • bin/launcher.tpl

  • bin/launcher.bat.tpl

Any additional files found in the template directories will be copied as is unless their filename ends with .tpl in which case Name Templates substitution will take place.

Skip Templates

You may skip any template files by defining a set of skip rules in the skipTemplates property. For example, you may use any of these expressions to skip a template named README.md.tpl:

  • README.md.tpl: matches the full template name

  • README.md: matches the transformed template name

  • README.*: matches using a regex

Additional Files

There are several ways to define additional files that may be handled by this assembler.

Templates

  • You may use Name Templates inside the files to be copied.

  • They retain directory structure that is, a template found at {templateDirectory}/foo.txt.tpl will be copied as foo.txt while a template such as {templateDirectory}/docs/bar.md.tpl will be copied to docs/bar.md.

FileSets

  • May use globs or regexes to define files to be included from a starting directory.

  • They retain directory structure.

  • May rename the target parent directory.

Files

  • May use globs or regexes to define files to be included from a starting directory.

  • They do not retain directory structure. Only filenames are copied.

Artifacts

  • They do not retain directory structure by default. An artifact with path set to bin/launcher.sh will be copied to launcher.sh.

  • May use the transform property to define the target path. An artifact with path set to bin/launcher.sh and transform set to bin/{{projectName}} will be copied to bin/app [assuming projectName resolves to app].

  • May use the platform property to filter files per matching platform. An artifact with platform set to windows-x86_64 will only be copied when the matching platform is compatible with windows-x86_64.

  • Artifacts without an explicit platform won’t be filtered.