Files
regorus/bindings/java/README.md
Anand Krishnamoorthi 6dc505c88b build: Add xtask automation for binding version management (#491)
* build: Add xtask automation for binding version management

Introduces a dedicated xtask crate that keeps language binding versions
in sync with the core regorus crate, following the workflow pattern used
by rust-analyzer, gitoxide, and ripgrep.

Key features:
- Git-based change detection: compares binding source files against a
  base ref (merge-base with origin/main by default) plus unstaged/
  untracked files to identify which bindings have been modified
- SemVer-aware bumping: binding edits trigger a minor version increment
  (e.g. 0.5.1 → 0.6.0) under pre-1.0 semantics, signaling potential
  breaking changes; clean bindings simply align to the root version
- Multi-language support: updates Cargo manifests (Rust FFI, Java,
  Python, WASM, Ruby), Maven pom.xml (Java), Ruby version constants,
  and C# project files in a single pass
- CI integration: --check mode fails fast when manifests are out of
  sync, ensuring pre-commit and release-plz workflows catch stale
  versions before merge

Integration points:
- release-plz.toml: runs cargo xtask bindings --base-ref origin/main
  after bumping the root crate, so binding versions are updated
  atomically during the release process
- scripts/pre-commit: invokes cargo xtask bindings --check to block
  commits that would leave bindings out of sync
- .cargo/config.toml: defines cargo xtask alias for convenience

Documentation includes inline examples showing how version bumps behave
when bindings are ahead/behind the root, and notes that the minor
field acts as the major version under SemVer 0.y.z initial development
phase.

Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>

* build: refresh xtask tooling, workflows, and locks

- cargo xtask bindings: keep the binding version-sync pipeline intact
- cargo xtask update-deps: new helper to regenerate workspace/binding Cargo.lock files
- workflows: auto-detect the Java jar version in CI and temporarily disable the Ruby workflow
- lock files: refresh root + binding snapshots after the dependency sweep

Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>

---------

Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>
2025-10-28 16:10:54 -05:00

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2.1 KiB
Markdown

# Regorus Java
<!-- Trivial change to trigger version bump test -->
**Regorus** is
- *Rego*-*Rus(t)* - A fast, light-weight [Rego](https://www.openpolicyagent.org/docs/latest/policy-language/)
interpreter written in Rust.
- *Rigorous* - A rigorous enforcer of well-defined Rego semantics.
See main [Regorus page](https://github.com/microsoft/regorus) for more details about the project.
## Building
Due to operational overhead we don't publish Java bindings to Maven Central
currently (see https://github.com/microsoft/regorus/issues/237) and you need to build from source to use it.
In order to build Regorus Java for a target platform, you need to install Rust target for that platform first:
```bash
$ rustup target add aarch64-apple-darwin
```
Afterwards, you can build native library for that target using:
```bash
$ cargo build --release --target aarch64-apple-darwin
```
You will then have a native library at `target/aarch64-apple-darwin/release/libregorus_java.dylib` depending on your target.
You then need to build Java bindings using:
```bash
$ mvn package
```
And you will have a JAR at `./target/regorus-java-0.1.5.jar`.
## Usage
You can use Regorus Java bindings as:
```java
import com.microsoft.regorus.Engine;
public class Test {
public static void main(String[] args) {
try (Engine engine = new Engine()) {
engine.addPolicy(
"hello.rego",
"package test\nmessage = concat(\", \", [input.message, data.message])"
);
engine.addDataJson("{\"message\":\"World!\"}");
engine.setInputJson("{\"message\":\"Hello\"}");
String resJson = engine.evalQuery("data.test.message");
System.out.println(resJson);
}
}
}
```
You need to ensure artifacts built in [previous section](#building) are in Java's classpath.
For example with `java` CLI:
```bash
$ java -Djava.library.path=../../target/aarch64-apple-darwin/release/ -cp target/regorus-java-0.1.5.jar Test.java
```
should gave you the output:
```
{"result":[{"expressions":[{"value":"Hello, World!","text":"data.test.message","location":{"row":1,"col":1}}]}]}
```