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<h5 class="subsubsection">16.9.2.5 Output parsers</h5>

<p class="noindent">There are cases in which GPS needs to parse the output of the VCS
commands: when querying the status, or when &ldquo;annotating&rdquo; a
file.

   <p>The following parsers can be implemented in the <code>vcs</code> node.

     <dl>
   <dt><code>&lt;status_parser&gt;</code><b>, </b><code>&lt;local_status_parser&gt;</code><b> and </b><code>&lt;update_parser&gt;</code><dd>These parsers are used by the command VCS.status_parse, to parse a string for
the status of files controlled by a VCS.

     <p>They accept the following child nodes:

          <dl>
  <dt><code>&lt;regexp&gt;</code><b> (mandatory)</b><dd>Indicates the regular expression to match. 
  <br><dt><code>&lt;file_index&gt;</code><dd>An index of a parenthesized expression in <code>regexp</code> that contains the name
of a file. 
  <br><dt><code>&lt;status_index&gt;</code><dd>An index of a parenthesized expression in <code>regexp</code> that contains the file
status. This status is passed through the regular expressions defined in the
<code>status_matcher</code> nodes, see below. 
  <br><dt><code>&lt;local_revision_index&gt;</code><dd>An index of a parenthesized expression in <code>regexp</code> that contains the name
of the local revision (the version of the file that was checked out). 
  <br><dt><code>&lt;repository_revision_index&gt;</code><dd>An index of a parenthesized expression in <code>regexp</code> that contains the name
of the repository revision (the latest version of the file in the VCS).

          <br><dt><code>&lt;status_matcher&gt;</code><dd>A regular expression which, when matching an expressions, identifies the status
passed in the node attribute <code>label</code>. 
</dl>

     <br><dt><code>&lt;annotations_parser&gt;</code><dd>This parser is used by the command VCS.annotations_parse, to parse a string for
annotations in a file controlled by a VCS.

     <p>It accepts the following child nodes:

          <dl>
  <dt><code>&lt;regexp&gt;</code><b> (mandatory)</b><dd>Indicates the regular expression to match.

          <br><dt><code>&lt;repository_revision_index&gt;</code><b> (mandatory)</b><dd>An index of a parenthesized expression in <code>regexp</code> that contains the
repository revision of the line.

          <br><dt><code>&lt;author_index&gt;</code><dd>An index of a parenthesized expression in <code>regexp</code> that contains the
author of the line.

          <br><dt><code>&lt;date_index&gt;</code><dd>An index of a parenthesized expression in <code>regexp</code> that contains the
date of the line.

          <br><dt><code>&lt;file_index&gt;</code><dd>An index of a parenthesized expression in <code>regexp</code> that indicates the
part of the line that belongs to the file.

          <br><dt><code>&lt;tooltip_pattern&gt;</code><dd>A template pattern that will be used to format the tooltip information. 
It can contain text and reference parenthesized expressions in
<code>regexp</code> using \<code>n</code> (where <code>n</code> represents the nth
expression in <code>regexp</code>).

     </dl>

     <br><dt><code>&lt;log_parser&gt;</code><dd>This parser is used by the command VCS.log_parse, to parse a string for
revision histories in a file controlled by a VCS.

     <p>It accepts the following child nodes:

          <dl>
  <dt><code>&lt;regexp&gt;</code><b> (mandatory)</b><dd>Indicates the regular expression to match.

          <br><dt><code>&lt;repository_revision_index&gt;</code><b> (mandatory)</b><dd>An index of a parenthesized expression in <code>regexp</code> that contains the
repository revision of the log.

          <br><dt><code>&lt;author_index&gt;</code><dd>An index of a parenthesized expression in <code>regexp</code> that contains the
author of the log.

          <br><dt><code>&lt;date_index&gt;</code><dd>An index of a parenthesized expression in <code>regexp</code> that contains the
date of the log.

          <br><dt><code>&lt;log_index&gt;</code><dd>An index of a parenthesized expression in <code>regexp</code> that contains the
actual text of the log. 
</dl>

     <br><dt><code>&lt;revision_parser&gt;</code><dd>This parser is used by the command VCS.revision_parse, to parse a string for
revision tags and branches in a file controlled by a VCS.

     <p>It accepts the following child nodes:

          <dl>
  <dt><code>&lt;regexp&gt;</code><b> (mandatory)</b><dd>Indicates the regular expression to match.

          <br><dt><code>&lt;sym_index&gt;</code><b> (mandatory)</b><dd>An index of a parenthesized expression in <code>regexp</code> that contains the
tags or branches symbolic name of the revision.

          <br><dt><code>&lt;repository_revision_index&gt;</code><b> (mandatory)</b><dd>An index of a parenthesized expression in <code>regexp</code> that contains the
repository revision number of the revision.

     </dl>

   </dl>

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