Warp4j

Turn JAR (java archive) into self-contained executable in a single command.

Features

downloads java runtimes automatically
makes runtimes optimized for your application
creates self-contained binaries for Linux, macOS and Windows using warp-packer
works on Linux, macOS and Windows (with Windows Subsystem for Linux)
supports cross "compilation"

TL;DR

Just put both warp4j and warp-packer somewhere in your PATH and run warp4j app.jar.

Install

One-liner

Installs latest versions of both warp4j and warp-packer:

$ bash -c "$(curl -fsSL https://raw.githubusercontent.com/guziks/warp4j/master/install)"

Manual

First install warp-packer and ensure other common tools available: awk, curl, grep, sed, sort, tar, unzip, optional: zip. Then install warp4j like this:

$ LOCATION=/usr/local/bin \
LINK=https://raw.githubusercontent.com/guziks/warp4j/master/warp4j \
TEMP_LOCATION=/tmp/warp4j \
bash -c 'curl -fsSL -o $TEMP_LOCATION $LINK && \
sudo install -D \
  --mode=755 \
  --owner=root \
  --group=root \
  "$TEMP_LOCATION" "$LOCATION"'

Previous command can be also used to upgrade to the latest version.

Usage

$ ls
my-app.jar

$ warp4j my-app.jar
...
...
...

$ ls -1
my-app.jar
warped

$ ls warped
my-app-linux
my-app-linux-x64.tar.gz
my-app-macos
my-app-macos-x64.tar.gz
my-app-windows.exe
my-app-windows-x64.zip

See help:

$ wapr4j --help

Usage: warp4j [options] <app.jar>

Turn JAR (java archive) into self-contained executable

Options:
  -j, --java-version   <version>
                       override JDK/JRE version
                       examples: "11", "11.0", "11.0.2", "11.0.2+9"
                       (default: 11)
  -o, --output         <directory>
                       override output directory;
                       this is relative to current PWD
                       (default: ./warped)
  --no-optimize        use JRE instead of optimized JDK;
                       by default jdeps and jlink are used to create
                       optimized JDK for the partiular jar,
                       JRE is always used for java 8
  --pull               check if more recent JDK/JRE distro is available;
                       by default latest cached version that matches
                       "--java-version" is used
  --target-linux       create binary for Linux
  --target-macos       create binary for macOS
  --target-windows     create binary for Windows
                       if no targets are specified then binaries for
                       all targets are created
  --jvm-impl           jvm implementation: hotspot or openj9
                       (default: hotspot)
  --jvm-options        <options>
                       passed to java like this:
                       "java <options> -jar <jar file>"
                       use quotes when passing multiple options
                       example: '-Xms512m -Xmx1024m'
  -h, --help           show this message

Compatibility

Tested on the following operating systems:

Ubuntu 18.04
macOS Mojave
Windows Subsystem for Linux with Ubuntu 14.04

Cache Location

Downloaded runtimes and prepared bundles are here:

Linux: $HOME/.local/share/warp4j
macOS: $HOME/Library/Application Support/warp4j

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