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<h2><a name="tar">Tar</a></h2>
<h3>Description</h3>
<p>Creates a tar archive.</p>
<p>The <i>basedir</i> attribute is the reference directory from where to tar.</p>
<p>This task is a <a href="../dirtasks.html#directorybasedtasks">directory based task</a>
and, as such, forms an implicit <a href="../CoreTypes/fileset.html">Fileset</a>. This
defines which files, relative to the <i>basedir</i>, will be included in the
archive. The tar task supports all the attributes of Fileset to refine the
set of files to be included in the implicit fileset.</p>

<p>In addition to the implicit fileset, the tar task supports nested filesets. These
filesets are extended to allow control over the access mode, username and groupname
to be applied to the tar entries. This is useful, for example, when preparing archives for
Unix systems where some files need to have execute permission.</p>

<p>Early versions of tar did not support path lengths greater than 100
characters. Modern versions of tar do so, but in incompatible ways.
The behaviour of the tar task when it encounters such paths is
controlled by the <i>longfile</i> attribute.
If the longfile attribute is set to <code>fail</code>, any long paths will
cause the tar task to fail.  If the longfile attribute is set to
<code>truncate</code>, any long paths will be truncated to the 100 character
maximum length prior to adding to the archive. If the value of the longfile
attribute is set to <code>omit</code> then files containing long paths will be
omitted from the archive.  Either option ensures that the archive can be
untarred by any compliant version of tar. If the loss of path or file
information is not acceptable, and it rarely is, longfile may be set to the
value <code>gnu</code>. The tar task will then produce a GNU tar file which
can have arbitrary length paths. Note however, that the resulting archive will
only be able to be untarred with GNU tar.  The default for the longfile
attribute is <code>warn</code> which behaves just like the gnu option except
that it produces a warning for each file path encountered that does not match
the limit.</p>

<p>This task can perform compression by setting the compression attribute to "gzip"
or "bzip2".</p>

<h3>Parameters</h3>
<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td valign="top" align="center"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">destfile</td>
    <td valign="top">the tar-file to create.</td>
    <td align="center" valign="top">Yes</td>
  </tr>
  <tr>
    <td valign="top">basedir</td>
    <td valign="top">the directory from which to zip the files.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">longfile</td>
    <td valign="top">Determines how long files (&gt;100 chars) are to be
       handled.  Allowable values are &quot;truncate&quot;, &quot;fail&quot;,
       &quot;warn&quot;, &quot;omit&quot; and &quot;gnu&quot;.  Default is
       &quot;warn&quot;.</td>
    <td valign="top" align="center">No</td>
  </tr>
  <tr>
    <td valign="top">includes</td>
    <td valign="top">comma separated list of patterns of files that must be
      included. All files are included when omitted.</td>
    <td valign="top" align="center">No</td>
  </tr>
  <tr>
    <td valign="top">includesfile</td>
    <td valign="top">the name of a file. Each line of this file is
      taken to be an include pattern</td>
    <td valign="top" align="center">No</td>
  </tr>
  <tr>
    <td valign="top">excludes</td>
    <td valign="top">comma separated list of patterns of files that must be
      excluded. No files (except default excludes) are excluded when omitted.</td>
    <td valign="top" align="center">No</td>
  </tr>
  <tr>
    <td valign="top">excludesfile</td>
    <td valign="top">the name of a file. Each line of this file is
      taken to be an exclude pattern</td>
    <td valign="top" align="center">No</td>
  </tr>
  <tr>
    <td valign="top">defaultexcludes</td>
    <td valign="top">indicates whether default excludes should be used or not
      (&quot;yes&quot;/&quot;no&quot;). Default excludes are used when omitted.</td>
    <td valign="top" align="center">No</td>
  </tr>
  <tr>
    <td valign="top">compression</td>
    <td valign="top">compression method.  Allowable values are 
       &quot;none&quot;, &quot;gzip&quot; and &quot;bzip2&quot;.  Default is
       &quot;none&quot;.</td>
    <td valign="top" align="center">No</td>
  </tr>
</table>

<h3>Nested Elements</h3>
The tar task supports nested <a href="../CoreTypes/fileset.html">tarfileset</a> elements. These are
extended Filesets which, in addition to the standard fileset elements, support three additional
attributes

<table border="1" cellpadding="2" cellspacing="0">
  <tr>
    <td valign="top"><b>Attribute</b></td>
    <td valign="top"><b>Description</b></td>
    <td valign="top" align="center"><b>Required</b></td>
  </tr>
  <tr>
    <td valign="top">mode</td>
    <td valign="top">An 3 digit octal string, specify the user, group and other modes in
                     the standard Unix fashion</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">username</td>
    <td valign="top">The username for the tar entry. This is not the same as the UID, which is
                     not currently set by the tar task.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">group</td>
    <td valign="top">The groupname for the tar entry. This is not the same as the GID, which is
                     not currently set by the tar task.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">prefix</td>
    <td valign="top">If the prefix attribute is set, all files in the fileset
    are prefixed with that path in the archive.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">fullpath</td>
    <td valign="top">If the fullpath attribute is set, the file in the fileset
    is written with that path in the archive. The prefix attribute, if specified, is
    ignored. It is an error to have more than one file specified in
    such a fileset.</td>
    <td align="center" valign="top">No</td>
  </tr>
  <tr>
    <td valign="top">preserveLeadingSlashes</td>
    <td valign="top">Indicates whether leading `/'s should
    be preserved in the file names. Default is <code>false</code>.</td>
    <td align="center" valign="top">No</td>
  </tr>
</table>

<h3>Examples</h3>
<pre>  &lt;tar tarfile=&quot;${dist}/manual.tar&quot; basedir=&quot;htdocs/manual&quot;/&gt;
  &lt;gzip zipfile=&quot;${dist}/manual.tar.gz&quot; src=&quot;${dist}/manual.tar&quot;/&gt;</pre>
<p>tars all files in the <code>htdocs/manual</code> directory into a file called <code>manual.tar</code>
in the <code>${dist}</code>  directory, then applies the gzip task to compress
it.</p>
<pre>  &lt;tar destfile=&quot;${dist}/manual.tar&quot;
       basedir=&quot;htdocs/manual&quot;
       excludes=&quot;mydocs/**, **/todo.html&quot;
  /&gt;</pre>
<p>tars all files in the <code>htdocs/manual</code> directory into a file called <code>manual.tar</code>
in the <code>${dist}</code> directory. Files in the directory <code>mydocs</code>,
or files with the name <code>todo.html</code> are excluded.</p>

<pre>
&lt;tar destfile=&quot;${basedir}/docs.tar&quot;&gt;
  &lt;tarfileset dir=&quot;${dir.src}/docs&quot;
              fullpath=&quot;/usr/doc/ant/README&quot;
              preserveLeadingSlashes=&quot;true&quot;&gt;
    &lt;include name=&quot;readme.txt&quot;/&gt;
  &lt;/tarfileset&gt;
  &lt;tarfileset dir=&quot;${dir.src}/docs&quot;
              prefix=&quot;/usr/doc/ant&quot;
              preserveLeadingSlashes=&quot;true&quot;&gt;
    &lt;include name=&quot;*.html&quot;/&gt;
  &lt;/tarfileset&gt;
&lt;/tar&gt;</pre>

<p>
  Writes the file <code>docs/readme.txt</code> as
  <code>/usr/doc/ant/README</code> into the archive. All
  <code>*.html</code> files in the <code>docs</code> directory are
  prefixed by <code>/usr/doc/ant</code>, so for example
  <code>docs/index.html</code> is written as
  <code>/usr/doc/ant/index.html</code> to the archive.
</p>


<pre>&lt;tar longfile=&quot;gnu&quot;
     destfile=&quot;${dist.base}/${dist.name}-src.tar&quot; &gt;
  &lt;tarfileset dir=&quot;${dist.name}/..&quot; mode=&quot;755&quot; username=&quot;ant&quot; group=&quot;ant&quot;&gt;
    &lt;include name=&quot;${dist.name}/bootstrap.sh&quot;/&gt;
    &lt;include name=&quot;${dist.name}/build.sh&quot;/&gt;
  &lt;/tarfileset&gt;
  &lt;tarfileset dir=&quot;${dist.name}/..&quot; username=&quot;ant&quot; group=&quot;ant&quot;&gt;
    &lt;include name=&quot;${dist.name}/**&quot;/&gt;
    &lt;exclude name=&quot;${dist.name}/bootstrap.sh&quot;/&gt;
    &lt;exclude name=&quot;${dist.name}/build.sh&quot;/&gt;
  &lt;/tarfileset&gt;
&lt;/tar&gt; </pre>

<p>This example shows building a tar which uses the GNU extensions for long paths and
where some files need to be marked as executable (mode 755)
and the rest are use the default mode (read-write by owner). The first
fileset selects just the executable files. The second fileset must exclude
the executable files and include all others. </p>

<p><strong>Note: </strong> The tar task does not ensure that a file is only selected
by one fileset. If the same file is selected by more than one fileset, it will be included in the
tar file twice, with the same path.</p>

<p><strong>Note:</strong> The patterns in the include and exclude
elements are considered to be relative to the corresponding dir
attribute as with all other filesets.  In the example above,
<code>${dist.name}</code> is not an absolute path, but a simple name
of a directory, so <code>${dist.name}</code> is a valid path relative
to <code>${dist.name}/..</code>.</p>

<hr>
<p align="center">Copyright &copy; 2000-2002 Apache Software Foundation. All rights
Reserved.</p>

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