SCP Task

## SCP

### Description

since Ant 1.6

Copies a file or FileSet to or from a (remote) machine running an SSH daemon. FileSet only works for copying files from the local machine to a remote machine.

Note: This task depends on external libraries not included in the Ant distribution. See Library Dependencies for more information. This task has been tested with jsch-0.1.2 and later.

See also the sshexec task

### Parameters

Attribute | Description | Required
file | The file to copy. This can be a local path or a remote path of the form user[:password]@host:/directory/path. :password can be omitted if you use key based authentication or specify the password attribute. The way remote path is recognized is whether it contains @ character or not. This will not work if your localPath contains @ character. | Yes, unless a nested `<fileset>` element is used.
localFile | This is an alternative to the file attribute. But this must always point to a local file. The reason this was added was that when you give file attribute it is treated as remote if it contains @ character. This character can exist also in local paths. since Ant 1.6.2 | Alternative to file attribute.
remoteFile | This is an alternative to the file attribute. But this must always point to a remote file. since Ant 1.6.2 | Alternative to file attribute.
todir | The directory to copy to. This can be a local path or a remote path of the form user[:password]@host:/directory/path. :password can be omitted if you use key based authentication or specify the password attribute. The way remote path is recognized is whether it contains @ character or not. This will not work if your localPath contains @ character. | Yes
localTodir | This is an alternative to the todir attribute. But this must always point to a local directory. The reason this was added was that when you give todir attribute it is treated as remote if it contains @ character. This character can exist also in local paths. since Ant 1.6.2 | Alternative to todir attribute.
localTofile | Changes the file name to the given name while receiving it, only useful if receiving a single file. since Ant 1.6.2 | Alternative to todir attribute.
remoteTodir | This is an alternative to the todir attribute. But this must always point to a remote directory. since Ant 1.6.2 | Alternative to todir attribute.
remoteTofile | Changes the file name to the given name while sending it, only useful if sending a single file. since Ant 1.6.2 | Alternative to todir attribute.
port | The port to connect to on the remote host. | No, defaults to 22.
trust | This trusts all unknown hosts if set to yes/true. Note If you set this to false (the default), the host you connect to must be listed in your knownhosts file, this also implies that the file exists. | No, defaults to No.
knownhosts | This sets the known hosts file to use to validate the identity of the remote host. This must be a SSH2 format file. SSH1 format is not supported. | No, defaults to ${user.home}/.ssh/known_hosts.
failonerror | Whether to halt the build if the transfer fails. | No; defaults to true.
password | The password. | Not if you are using key based authentication or the password has been given in the file or todir attribute.
keyfile | Location of the file holding the private key. | Yes, if you are using key based authentication.
passphrase | Passphrase for your private key. | No, defaults to an empty string.
verbose | Determines whether SCP outputs verbosely to the user. Currently this means outputting dots/stars showing the progress of a file transfer. since Ant 1.6.2 | No; defaults to false.
sftp | Determines whether SCP uses the sftp protocol. The sftp protocol is the file transfer protocol of SSH2. It is recommended that this be set to true if you are copying to/from a server that doesn't support scp1. since Ant 1.7 | No; defaults to false.
preserveLastModified | Determines whether the last modification timestamp of downloaded files is preserved. It only works when transferring from a remote to a local system and probably doesn't work with a server that doesn't support SSH2. since Ant 1.8.0 | No; defaults to false.

### Parameters specified as nested elements

#### fileset

FileSets are used to select sets of files to copy. To use a fileset, the `todir` attribute must be set.

### Examples

Copy a single local file to a remote machine

      <scp file="myfile.txt" todir="user:password@somehost:/home/chuck"/>

Copy a single local file to a remote machine with separate password attribute

      <scp file="myfile.txt" todir="user@somehost:/home/chuck" password="password"/>

Copy a single local file to a remote machine using key base authentication.

      <scp file="myfile.txt"
           todir="user@somehost:/home/chuck"
           keyfile="${user.home}/.ssh/id_dsa"
           passphrase="my extremely secret passphrase"
      />

Copy a single remote file to a local directory

      <scp file="user:password@somehost:/home/chuck/myfile.txt" todir="../some/other/dir"/>

Copy a remote directory to a local directory

      <scp file="user:password@somehost:/home/chuck/*" todir="/home/sara"/>

Copy a local directory to a remote directory

      <scp todir="user:password@somehost:/home/chuck/">
        <fileset dir="src_dir"/>
      </scp>

Copy a set of files to a directory

      <scp todir="user:password@somehost:/home/chuck">
        <fileset dir="src_dir">
          <include name="**/*.java"/>
        </fileset>
      </scp>

      <scp todir="user:password@somehost:/home/chuck">
        <fileset dir="src_dir" excludes="**/*.java"/>
      </scp>

Security Note: Hard coding passwords and/or usernames in scp task can be a serious security hole. Consider using variable substitution and include the password on the command line. For example:

        <scp todir="${username}:${password}@host:/dir" ...>

Invoking ant with the following command line:

        ant -Dusername=me -Dpassword=mypassword target1 target2

Is slightly better, but the username/password is exposed to all users on an Unix system (via the ps command). The best approach is to use the `<input>` task and/or retrieve the password from a (secured) .properties file.

Unix Note: File permissions are not retained when files are copied; they end up with the default `UMASK` permissions instead. This is caused by the lack of any means to query or set file permissions in the current Java runtimes. If you need a permission- preserving copy function, use `<exec executable="scp" ... >` instead.