This small repository contains examples on how to use a code differencing tool GumTreeDiff (GTD) from Java source code through APIs.

Folder gumtreediff-api-examples-maven contains a sample maven project that runs API use examples.

SDK version 11+ (these projects are developed with java-11-openjdk-amd64).

These projects are built with maven version 3.6.3.

Before building and running any of the projects for the first time please configure the maven workflow for GTD:

Step 0

If you do not yet have a GitHub account, register there.

Step 1

Go to your account and generate a personal access token (if you already have it, make sure it has all necessary permissions - see below):

1. Follow the instructions here

2. In step 6 of the above instructions set the token name to github-GTD or any other of your choice

3. In step 7 of the above instructions set at least the following permissions: repo, read:packages

Step 2

Configure maven to authenticate GithubPackages as a valid package source:

1. Full instructions are available here, section Authenticating to GitHub Packages/Authenticating with a personal access token, but the relevant steps are:

2. Create or edit the ~/.m2/settings.xml from the template provided in the above instructions

3. Update repository and server sections of the settings.xml to the following values:

<repository>
  <id>github</id>
  <name>GitHub GumTreeDiff Apache Maven Packages</name>
  <url>https://maven.pkg.github.com/gumtreediff/gumtree</url>
  <releases><enabled>true</enabled></releases>
  <snapshots><enabled>true</enabled></snapshots>
</repository>

<server>
  <id>github</id>
  <username>HERE_YOUR_GITHUB_USERNAME</username>
  <password>HERE_YOUR_GITHUB_PERSONAL_ACCESS_TOKEN</password>
</server>

The projects are developed in IntelliJ IDEA 2020.3.3 (Community Edition), so there are various build and run configurations available for each project in respective gumtreediff-examples/PROJECTNAME/.idea/runConfigurations/ folders.