warp4j/README.md

# Warp4j

Turn JAR (java archive) into self-contained executable. 

## Features

- automatically downloads java runtimes
- creates runtimes optimized for your application
- creates self-contained binaries for Linux, macOS and Windows using [warp-packer](https://github.com/dgiagio/warp)

## TL;DR

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

## Install

First install [warp-packer](https://github.com/dgiagio/warp/releases) and ensure other common tools available: `curl`, `awk`, `sed`. 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 && \
chmod 755 $TEMP_LOCATION && \
sudo mkdir -p $LOCATION && \
sudo mv $TEMP_LOCATION $LOCATION/warp4j'
```

## 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
  --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 specified then create for all
  --jvm-impl           jvm implementation: hotspot or openj9
                       default: hotspot
  --jvm-options        <options>
                       passed to java like this:
                       "java <options> -jar <jar file>"
                       use quotes, for example:
                       '-Xms512m -Xmx1024m'
  -h, --help           show this message
```

## Cache Location

Downloaded runtimes and prepared bundles are here:

- Linux: `$HOME/.local/share/warp4j`
- macOS: `$HOME/Library/Application Support/warp4j`
- Windows: `%LOCALAPPDATA%\warp4j`