https://github.com/xanonymous-github/gumtree

The implementation of GumTree algorithm.
https://github.com/xanonymous-github/gumtree

antlr ast-differencing coroutines gumtree jvm kotlin kotlin-dsl kover ktlint tree-diffing

Last synced: about 1 month ago
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The implementation of GumTree algorithm.

• Host: GitHub
• URL: https://github.com/xanonymous-github/gumtree
• Owner: Xanonymous-GitHub
• License: gpl-3.0
• Created: 2024-07-14T21:39:03.000Z (5 months ago)
• Default Branch: main
• Last Pushed: 2024-11-11T15:24:22.000Z (about 1 month ago)
• Last Synced: 2024-11-11T16:29:50.073Z (about 1 month ago)
• Topics: antlr, ast-differencing, coroutines, gumtree, jvm, kotlin, kotlin-dsl, kover, ktlint, tree-diffing
• Language: Kotlin
• Homepage:
• Size: 402 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 5
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# GumTree

[![codecov](https://codecov.io/github/Xanonymous-GitHub/gumtree/graph/badge.svg?token=APHSDWWVC4)](https://codecov.io/github/Xanonymous-GitHub/gumtree)

**Description:**

GumTree is a Kotlin library for implementing the GumTree algorithm.

The origin paper can be found at [here](https://doi.org/10.1145/2642937.2642982)

**Getting Started**

1. **Prerequisites:**

    * **JDK:** Gumtree requires JDK 21 to build and run. 

2. **Clone the Repository:**

   ```bash

   git clone [email protected]:Xanonymous-GitHub/gumtree.git

   ```

3. **Build the Project:**

   ```bash

   ./gradlew build

   ```

> [!NOTE]

> This also runs the tests.

4. **Run Unit Tests:**

   ```bash

   ./gradlew test

   ```

> [!TIP]

> Human-readable unit tests report generated by Kover can be found in `build/reports/kover/html/index.html`.

> The build folder is generated in each Gradle subproject after running the `test` task.

**Usages**

This project currently supports converting ANTLR's parse tree to `GumTree`.

Assume we have a file, and `UrlLexer` and `UrlParser` are the lexer and parser for URLs.

Then we can convert the file to a `GumTree` as follows:

```kotlin

// This API is defined in the `antlr-bridge` module.

val file = File("src/test/kotlin/data/urls.txt")

val inputStream = file.inputStream()

runBlocking {

    GumTreeConverter.convertFrom(inputStream, ::UrlLexer, ::UrlParser, UrlParser::url)

}

```

You can use the `DiffCalculator` class to compute the edit script between two `GumTree`s.

```kotlin

val (tree1, tree2) = treePair

val calculator = DiffCalculator()

runBlocking {

    val editScript = calculator.computeEditScriptFrom(tree1 to tree2)

    assertEquals(7, editScript.size)

}

```