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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>Note that this task does not perform compression. You might want to use the 
<a href="gzip.html">GZip</a> task to prepare a .tar.gz package.</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">tarfile</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>
</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>
</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 tarfile=&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 longfile=&quot;gnu&quot;
     tarfile=&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; 2000,2001 Apache Software Foundation. All rights
Reserved.</p>

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