# configure

The `configure` task is used to configure Ivy with a settings XML file.

See Settings Files for details about the settings file itself.

[since 2.0]

The file loaded used to be called configuration file in versions prior to 2.0. The name settings and the use of the `ivy.settings.file` is new to 2.0.

It is also possible to configure Ivy with the settings declaration. The difference with this task is that when using the settings declaration, the configuration of Ivy will be done when the settings are first needed (for instance, when you do a resolve), while the configure task will perform a configuration of Ivy instantly, which makes it easier to see the problem if something goes wrong.

## Attributes

Attribute | Description | Required
--- | --- | ---
settingsId | The settings id usable in the `settingsRef` attributes of the Ivy task that needs a setting. | No, defaults to `ivy.instance`
file | path to the settings file to use | No. If a file is provided, URL is ignored. If none are provided, then it attempts to find a file at `${ivy.settings.file}`, and if this file does not exist, it uses `${ivy.settings.url}` (since 2.3) or a default settings file
url | URL of the settings file to use

override

Specify what to do when another settings with the same id has already been loaded.
* `true`: the current settings will take precedence over any previously defined setting with this id
* `false`: the current settings will not override a previously defined setting with this id
* `notallowed`: an error is raised if a settings has already been defined with this id

No, defaults to `notallowed`

host | HTTP authentication host | No, unless authentication is required
realm | HTTP authentication realm
username | HTTP authentication user name
passwd | HTTP authentication password

## HTTP Authentication

If any of the URLs you use in Ivy (especially in dependency resolvers) needs HTTP authentication, then you have to provide the `host`, `realm`, `username` and `passwd` attributes of the configure task. These settings will then be used in any further call to Ivy tasks.

(since 1.4) It’s also possible to configure authentication settings for multiple URLs. This can be done with the `<credentials>` subelements. See the examples for more details.

## Examples

### Simplest settings

    <ivy:configure/>

Use either `${ivy.settings.file}` if it exists, or the default settings file

### Configure with a file

    <ivy:configure file="myconffile.xml"/>

### Configure with an URL

    <ivy:configure url="http://mysite.com/myconffile.xml"/>

### Configure multiple URLs which require authentication

    <ivy:configure file="path/to/my/ivysettings.xml">
      <credentials host="myhost.com" realm="My Realm" username="myuser" passwd="mypasswd"/>
      <credentials host="yourhost.com" realm="Your Realm" username="myuser" passwd="myotherpasswd"/>
    </ivy:configure>