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# API Reference

- [Basic functions](#basic-functions)
  - [artifact](#artifact)
    - [Parameters](#parameters)
  - [maven_install](#maven_install)
    - [Parameters](#parameters-1)
- [Maven specification functions](#maven-specification-functions)
  - [maven.repository](#mavenrepository)
    - [Parameters](#parameters-2)
  - [maven.artifact](#mavenartifact)
    - [Parameters](#parameters-3)
  - [maven.exclusion](#mavenexclusion)
    - [Parameters](#parameters-4)

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# Basic functions

These are the basic functions to get started.

To use these functions, load them at the top of your BUILD file. For example:

```python
load("@rules_jvm_external//:defs.bzl", "maven_install", "artifact")
```
## artifact

<pre>
artifact(<a href="#artifact-coordinates">coordinates</a>, <a href="#artifact-repository_name">repository_name</a>)
</pre>

A helper macro to translate Maven coordinates into a Bazel target label.

For example:

`artifact("com.google.guava:guava")` translates into `@maven//:com_google_guava_guava`

`artifact("com.google.guava:guava", repository_name = "custom_maven")` translates into `@custom_maven//:com_google_guava_guava`


### Parameters

<table class="params-table">
  <colgroup>
    <col class="col-param" />
    <col class="col-description" />
  </colgroup>
  <tbody>
    <tr id="artifact-coordinates">
      <td><code>coordinates</code></td>
      <td>
        required.
      </td>
    </tr>
    <tr id="artifact-repository_name">
      <td><code>repository_name</code></td>
      <td>
        optional. default is <code>"maven"</code>
        <p>
          The name of the `maven_install` declaration in the WORKSPACE file containing this artifact.
        </p>
      </td>
    </tr>
  </tbody>
</table>


## maven_install

<pre>
maven_install(<a href="#maven_install-name">name</a>, <a href="#maven_install-repositories">repositories</a>, <a href="#maven_install-artifacts">artifacts</a>, <a href="#maven_install-fetch_sources">fetch_sources</a>, <a href="#maven_install-use_unsafe_shared_cache">use_unsafe_shared_cache</a>)
</pre>

Resolves and fetches artifacts transitively from Maven repositories.

This macro runs a repository rule that invokes the Coursier CLI to resolve
and fetch Maven artifacts transitively.


### Parameters

<table class="params-table">
  <colgroup>
    <col class="col-param" />
    <col class="col-description" />
  </colgroup>
  <tbody>
    <tr id="maven_install-name">
      <td><code>name</code></td>
      <td>
        optional. default is <code>"maven"</code>
        <p>
          A unique name for this Bazel external repository.
        </p>
      </td>
    </tr>
    <tr id="maven_install-repositories">
      <td><code>repositories</code></td>
      <td>
        optional. default is <code>[]</code>
        <p>
          A list of Maven repository URLs, specified in lookup order.

  Supports URLs with HTTP Basic Authentication, e.g. "https://username:password@example.com".
        </p>
      </td>
    </tr>
    <tr id="maven_install-artifacts">
      <td><code>artifacts</code></td>
      <td>
        optional. default is <code>[]</code>
        <p>
          A list of Maven artifact coordinates in the form of `group-id:artifact-id:version`.
        </p>
      </td>
    </tr>
    <tr id="maven_install-fetch_sources">
      <td><code>fetch_sources</code></td>
      <td>
        optional. default is <code>False</code>
        <p>
          Additionally fetch source JARs.
        </p>
      </td>
    </tr>
    <tr id="maven_install-use_unsafe_shared_cache">
      <td><code>use_unsafe_shared_cache</code></td>
      <td>
        optional. default is <code>False</code>
        <p>
          Download artifacts into a persistent shared cache on disk. Unsafe as Bazel is
  currently unable to detect modifications to the cache.
        </p>
      </td>
    </tr>
  </tbody>
</table>


# Maven specification functions

These are helper functions to specify more information about Maven artifacts and
repositories in `maven_install`.

To use these functions, load the `maven` struct at the top of your BUILD file:

```python
load("@rules_jvm_external//:specs.bzl", "maven")
```
## maven.repository

<pre>
maven.repository(<a href="#maven.repository-url">url</a>, <a href="#maven.repository-user">user</a>, <a href="#maven.repository-password">password</a>)
</pre>

Generates the data map for a Maven repository specifier given the available information.

If both a user and password are given as arguments, it will include the
access credentials in the repository spec. If one or both are missing, it
will just generate the repository url.


### Parameters

<table class="params-table">
  <colgroup>
    <col class="col-param" />
    <col class="col-description" />
  </colgroup>
  <tbody>
    <tr id="maven.repository-url">
      <td><code>url</code></td>
      <td>
        required.
        <p>
          A string containing the repository url (ex: "https://maven.google.com/").
        </p>
      </td>
    </tr>
    <tr id="maven.repository-user">
      <td><code>user</code></td>
      <td>
        optional. default is <code>None</code>
        <p>
          A username for this Maven repository, if it requires authentication (ex: "johndoe").
        </p>
      </td>
    </tr>
    <tr id="maven.repository-password">
      <td><code>password</code></td>
      <td>
        optional. default is <code>None</code>
        <p>
          A password for this Maven repository, if it requires authentication (ex: "example-password").
        </p>
      </td>
    </tr>
  </tbody>
</table>


## maven.artifact

<pre>
maven.artifact(<a href="#maven.artifact-group">group</a>, <a href="#maven.artifact-artifact">artifact</a>, <a href="#maven.artifact-version">version</a>, <a href="#maven.artifact-packaging">packaging</a>, <a href="#maven.artifact-classifier">classifier</a>, <a href="#maven.artifact-override_license_types">override_license_types</a>, <a href="#maven.artifact-exclusions">exclusions</a>)
</pre>

Generates the data map for a Maven artifact given the available information about its coordinates.

### Parameters

<table class="params-table">
  <colgroup>
    <col class="col-param" />
    <col class="col-description" />
  </colgroup>
  <tbody>
    <tr id="maven.artifact-group">
      <td><code>group</code></td>
      <td>
        required.
        <p>
          The Maven artifact coordinate group name (ex: "com.google.guava").
        </p>
      </td>
    </tr>
    <tr id="maven.artifact-artifact">
      <td><code>artifact</code></td>
      <td>
        required.
        <p>
          The Maven artifact coordinate artifact name (ex: "guava").
        </p>
      </td>
    </tr>
    <tr id="maven.artifact-version">
      <td><code>version</code></td>
      <td>
        required.
        <p>
          The Maven artifact coordinate version name (ex: "27.0-jre").
        </p>
      </td>
    </tr>
    <tr id="maven.artifact-packaging">
      <td><code>packaging</code></td>
      <td>
        optional. default is <code>None</code>
        <p>
          The Maven packaging specifier (ex: "jar").
        </p>
      </td>
    </tr>
    <tr id="maven.artifact-classifier">
      <td><code>classifier</code></td>
      <td>
        optional. default is <code>None</code>
        <p>
          The Maven artifact classifier (ex: "javadoc").
        </p>
      </td>
    </tr>
    <tr id="maven.artifact-override_license_types">
      <td><code>override_license_types</code></td>
      <td>
        optional. default is <code>None</code>
        <p>
          An array of Bazel license type strings to use for this artifact's rules (overrides autodetection) (ex: ["notify"]).
        </p>
      </td>
    </tr>
    <tr id="maven.artifact-exclusions">
      <td><code>exclusions</code></td>
      <td>
        optional. default is <code>None</code>
        <p>
          An array of exclusion objects to create exclusion specifiers for this artifact (ex: maven.exclusion("junit", "junit")).
        </p>
      </td>
    </tr>
  </tbody>
</table>


## maven.exclusion

<pre>
maven.exclusion(<a href="#maven.exclusion-group">group</a>, <a href="#maven.exclusion-artifact">artifact</a>)
</pre>

Generates the data map for a Maven artifact exclusion.

### Parameters

<table class="params-table">
  <colgroup>
    <col class="col-param" />
    <col class="col-description" />
  </colgroup>
  <tbody>
    <tr id="maven.exclusion-group">
      <td><code>group</code></td>
      <td>
        required.
        <p>
          The Maven group name of the dependency to exclude, e.g. "com.google.guava".
        </p>
      </td>
    </tr>
    <tr id="maven.exclusion-artifact">
      <td><code>artifact</code></td>
      <td>
        required.
        <p>
          The Maven artifact name of the dependency to exclude, e.g. "guava".
        </p>
      </td>
    </tr>
  </tbody>
</table>