# Bill of Materials

Tracking multiple add-on versions for your project can quickly become cumbersome. In that situation, you can use the convenient [Result Library Bill of Materials](https://github.com/LeakyAbstractions/result-bom) to centralize and align their versions. This ensures compatibility and simplifies dependency maintenance.

{% hint style="info" %}
[Maven](https://maven.apache.org/)'s Bill of Materials POMs are special POM files that group dependency versions known to be valid and tested to work together, reducing the chances of having version mismatches.
{% endhint %}

The basic idea is that instead of specifying a version number for each Result library in your project, you can use this BOM to get a complete set of consistent versions.

## How to Use this Add-On

Add this Maven dependency to your build:

| Group ID                | Artifact ID  | Latest Version                                                                                    |
| ----------------------- | ------------ | ------------------------------------------------------------------------------------------------- |
| `com.leakyabstractions` | `result-bom` | ![](https://img.shields.io/endpoint?url=https://dev.leakyabstractions.com/result-bom/latest.json) |

### Maven

To [import the BOM using Maven](https://maven.apache.org/guides/introduction/introduction-to-dependency-mechanism.html#bill-of-materials-bom-poms), use the following:

```xml
<!-- Import the BOM -->
<dependencyManagement>
  <dependencies>
    <dependency>
      <groupId>com.leakyabstractions</groupId>
      <artifactId>result-bom</artifactId>
      <version>1.0.0.0</version>
      <scope>import</scope>
      <type>pom</type>
    </dependency>
  </dependencies>
</dependencyManagement>

<!-- Define dependencies without version numbers -->
<dependencies>
  <dependency>
    <groupId>com.leakyabstractions</groupId>
    <artifactId>result</artifactId>
  </dependency>
  <dependency>
    <groupId>com.leakyabstractions</groupId>
    <artifactId>result-assertj</artifactId>
    <scope>test</scope>
  </dependency>
</dependencies>
```

### Gradle

To [import the BOM using Gradle](https://docs.gradle.org/current/userguide/platforms.html#sub:bom_import), use the following:

```groovy
dependencies {
  // Import the BOM
  implementation platform("com.leakyabstractions:result-bom:1.0.0.0")

  // Define dependencies without version numbers
  implementation("com.leakyabstractions:result")
  testImplementation("com.leakyabstractions:result-assertj")
}
```

## Conclusion

We discussed the benefits of using the Bill of Materials for managing dependencies in your project. With the BOM, you can eliminate the hassle of manually specifying version numbers, ensuring consistency and compatibility across all Result libraries.


---

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