JarManager

JarManager is a java library that allows you un-pack jar files to a directory, pack directories to a jar and relocate packages inside a jar using jar-relocator.

The library is simple to use and doesn't require much configuration.

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Installation

Firstly, add our Maven to your build.gradle file.

repositories {
    mavenCentral()
    
    // Your other repos might be here
    
    maven {
        url "https://maven.firstdarkdev.xyz/releases"
    }
}

Next, add the library to your build.gradle file.

View the latest version on our Maven or use the version in the badge above

dependencies {
    // Existing dependencies
    implementation "com.hypherionmc:jarmanager:1.0.0"
}

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Using the library

Once you have the library added to your project, using it is really simple.

Unpacking a Jar file

public void unpackJar() throws IOException {
        File testDirectory = new File("testdir");
        File outputDirectory = new File(testDirectory, "output");

        if (!outputDirectory.exists())
        outputDirectory.mkdirs();

        // Create a JarManager instance
        JarManager manager = JarManager.getInstance();

        // Unpack the Jar
        manager.unpackJar(new File(testDirectory, "input.jar"), outputDirectory);
        }

Repacking a Jar file

public void repackJar() throws IOException {
        File testDirectory = new File("testdir");
        File inputDirectory = new File(testDirectory, "output");

        // Create a JarManager instance
        JarManager manager = JarManager.getInstance();

        // Pack the Jar
        manager.packJar(inputDirectory, new File(testDirectory, "output.jar"));
    }

Relocating Packages

public void remapJar() throws IOException {
        File testDirectory = new File("testdir");
        File inputFile = new File(testDirectory, "input.jar");

        // Create a JarManager instance
        JarManager manager = JarManager.getInstance();

        // Remap the Jar
        HashMap<String, String> rl = new HashMap<>();
        rl.put("com.gitlab.cdagaming", "test.com.gitlab.cdagaming");
        manager.remapJar(inputFile, new File(testDirectory, "remapped.jar"), rl);
    }

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Licenses

JarManager is licensed under the MIT License.

JarManager includes the following embedded libraries:

• jar-relocator A fork of the original with additional features - Licensed under Apache-2.0 License
• OW2 ASM - Licensed under BSD 3-Clause License