This task will check if any of the specified dependencies, and their dependencies are missing or updated, and download them if necessary. The dependencies will be made available as a fileset or path reference.
The dependencies task accepts the following attributes:
| Attribute | Description | Required | Since |
| filesetId | The reference ID to store a fileset under, for the resolved dependencies. | No | |
| javadocFilesetId | The reference ID to store a fileset under, for the javadoc attachments of the resolved dependencies. | No | 2.0.9 |
| pathId | The reference ID to store a path under, for the resolved dependencies. | No | |
| pomRefId | The reference ID from a POM datatype defined earlier in the build file. | Yes, either this or a pom nested element or one or more dependency nested elements | |
| settingsFile | The settings file to use. Defaults to ${user.home}/.ant/settings.xml or if that doesn't exist ${user.home}/.m2/settings.xml. | No | 2.0.6 |
| sourcesFilesetId | The reference ID to store a fileset under, for the sources attachments of the resolved dependencies. | No | 2.0.6 |
| type | A comma separated list of artifact types to be retrieved. By default all artifact types will be included. | No | |
| pathType | A comma separated list of artifact types to be added to the path object. By default all artifact types will be included. | No | |
| useScope | Follows the Maven scope behaviour. Can be set to compile, runtime, or test. If no value is provided, all scopes will be included. | No | |
| scopes | A comma separated list of specific scopes to be retrieved. If no value is provided, all scopes will be included. | No | 2.0.10 |
| versionsId | The property ID to store the versions of the resolved dependencies, for use by a VersionMapper. | No | 2.0.7 |
| cacheDependencyRefs | If set to true, will generate an Ant build file that contains properties and fileset references for the dependencies. Then try to load information from this file in subsequent builds. Default is false. | No | 2.1.0 |
| addArtifactFileSetRefs | Deprecated Add a fileset for each resolved dependency. The fileset has an id of groupId:artifactId:type[:classifier]. Default is true (was false in 2.0.10). | No | 2.0.10 |
| verbose | Deprecated in version 2.1.0. Use the Ant command line -v option for verbose output. | No |
The task can include the dependency nested type, in addition to the other shared types localRepository, pom and remoteRepository, which will be explained later.
You must include either a single pom element or a pomRefId attribute or one or more dependency elements.
If you have set a value for versionsId, you can later use VersionMapper.
(since 2.0.8) For each dependency resolved, the property groupId:artifactId:type[:classifier] is defined pointing to the corresponding file.
Dependency definition is done in Maven Ant Tasks exactly like it is done in Maven: it is summarized here, but you can look at the reference documentation for more information.
| Attribute | Description | Required |
| groupId | The group ID of the dependency. | Yes |
| artifactId | The artifact ID of the dependency. | Yes |
| version | The version of the dependency. | Yes |
| type | The type of the dependency. The default is jar. | No |
| classifier | The classifier of the dependency. | No |
| scope | The scope of the usage of the dependency, which affects which of that dependency's own dependencies are also retrieved. This can be compile (default), runtime, test, provided or system. | No |
| systemPath | FOR SYSTEM SCOPE ONLY. This specifies the path on the filesystem for this dependency. | No |
The dependency can also nest multiple exclusion elements.
Dependencies that use the system scope specify a path on the local system that may be outside of the local maven repository. An Ant fileset only allows a single base directory, so these dependencies will not be included in the generated fileset for resolved dependencies. They will, however, be included in the path object.
These tasks will install/deploy the given file into the local/remote repository. It is stored using the information in the supplied POM. Multiple artifacts can be attached during install/deploy using attach elements.
| Attribute | Description | Required | Since |
| file | The file to install in the repository. | Yes, unless an attached artifact is specified | |
| pomRefId | The reference ID from a POM datatype defined earlier in the build file. | Yes, unless a pom nested element is provided instead | |
| settingsFile | The settings file to use. Defaults to ${user.home}/.ant/settings.xml or if that doesn't exist ${user.home}/.m2/settings.xml. | No | 2.0.6 |
| uniqueVersion | (deploy only) Whether to assign snapshots a unique version comprised of the timestamp and build number, or to use the same version each time | No, the default is true. |
The task must take either a nested pom element, or a pomRefId attribute. Both release and -SNAPSHOT versions are supported. The task can have an optional localRepository nested element.
deploy can have an optional remoteRepository nested element. If no remoteRepository nested element is given, the distributionManagement section of the POM is used.
This task will install a Wagon provider, to add support for more protocols.
| Attribute | Description | Required | Since |
| artifactId | The artifact ID of the provider to install. | Yes | |
| groupId | The group ID of the provider to install. The default is org.apache.maven.wagon. | No | 2.0.7 |
| version | The version of the provider to install. | Yes |
This task will write a POM object to a file.
| Attribute | Description | Required |
| pomRefId | The ID of the POM to write. | Yes |
| file | The name of the file to write the POM | Yes |
| trim | A boolean value to determine whether unnecessary information should be removed from the POM. Defaults to true. | No |
This task will run a Maven process either from a specific Maven Home, or by downloading the required version and running from the local repository directly. The task extends th java task with the following additional attributes.
| Attribute | Description | Required | Since |
| pom | The pom.xml file to use. If not specified Maven will look for a pom.xml in the current directory | No | 2.0.10 |
| mavenHome | The MAVEN_HOME of the version of Maven to launch. If not specified then mavenVersion will control the version of Maven that is launched. | No | 2.0.10 |
| mavenVersion | The version of Maven to launch. The required dependencies will be resolved and Maven will be launched directly from the local repository. There is no requirement to have Maven installed locally. This is ignored if mavenHome is specified. The default value is 2.0.10. Prior to Maven Ant Tasks 2.1.2 only Maven versions in the range [2.0.10,2.2.1] could be launched. Since Maven Ant Tasks 2.1.2 the range has been extended to [2.0.10,3.0.2] newer versions of Maven will probably also work but are untested at this time. | No | 2.0.10 |
| localRepository | The location of the local repository to be used by Maven. | No | 2.0.10 |
| batchMode | Whether to launch Maven in batch mode or not. Defaults to true. | No | 2.0.10 |
Specifies the location of the local repository of artifacts.
| Attribute | Description | Required | Since |
| layout | The layout of the local repository. The valid options are legacy (Maven 1), or default (Maven 2). Defaults to default. | No | |
| path | The directory of the local repository. | Yes | 2.0.7 |
Note: until 2.0.6, attribute path was named location, but this changed in 2.0.7 to solve a conflict with Ant 1.7.
Specifies the location of a remote repository.
| Attribute | Description | Required |
| id | A unique ID of the repository. | Yes |
| url | The URL of the repository. | Yes |
| layout | The layout of the remote repository. The valid options are legacy (Maven 1), or default (Maven 2). Defaults to default. | No |
A remoteRepository can have the following nested elements: releases, snapshots, authentication and proxy.
Policies about downloading different types of artifacts.
| Attribute | Description | Required |
| checksumPolicy | How to treat missing or incorrect checksums for the dependencies that are downloaded. Valid values are warn (default) and fail. | No |
| enabled | Whether to download this type of artifact from the repository. Default is true. | No |
| updatePolicy | How often to check for updates on dependencies that are snapshots or include a range of versions. Valid values are never, interval:MINUTES, daily (default), always. | No |
The authentication element is used for passing a username, password and other credentials to the repository either on upload or download. The content is the same as for server in the settings reference.
The proxy element is typically used for HTTP repositories. The content is the same as for proxy in the settings reference.
The POM element will load a POM file and make it available as a reference for the other tasks or as properties.
| Attribute | Description | Required | Since |
| file | The file of the POM to load. | Yes | |
| id | The reference ID of this POM. | No | |
| refid | The reference ID to use a previously defined POM. | No | |
| inheritAllProperties | If set to true, all Ant properties will be passed to the Maven POM. If set to false, only user (command-line) properties will be passed. Defaults to true. | No | 2.1.0 |
| settingsFile | The settings file to use. Defaults to ${user.home}/.ant/settings.xml or if that doesn't exist ${user.home}/.m2/settings.xml. | No | 2.0.6 |
Multiple profile elements can be nested within the pom element. By default the profile will be activated. If active is set to false, then the profile will be explicitly deactivated.
| Attribute | Description | Required |
| id | The id of the profile to be activated/deactivated. | Yes |
| active | Set to true or false to determine whether the profile should be active. Default is true. | No |
This is a filename mapper that removes version info from the filename when copying dependencies. It can also, optionally, remove the directory info from the filename.
The full class name to use in classname attribute of <mapper> element is org.apache.maven.artifact.ant.VersionMapper.
| Attribute | Description | Required |
| from | The versions of the dependencies, as set by versionsId attribute of dependencies task. | Yes |
| to | If this is set to flatten the directory info is also removed from the filename. | No |
You can see a full working example in the examples.