* doc/apt-key.8.xml:

[apt.git] / doc / apt_preferences.5.xml

diff --git a/doc/apt_preferences.5.xml b/doc/apt_preferences.5.xml
index 54c01100c05866e16c9abeffd56329efbf63a127..1f953029eb521469677353925321c55813b54d80 100644 (file)
--- a/doc/apt_preferences.5.xml
+++ b/doc/apt_preferences.5.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8" standalone="no"?>
-<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
-  "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd" [
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
+  "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
 
 <!ENTITY % aptent SYSTEM "apt.ent">
 %aptent;
@@ -17,7 +17,7 @@
    &apt-email;
    &apt-product;
    <!-- The last update date -->
-   <date>16 February 2010</date>
+   <date>2010-02-16T00:00:00Z</date>
  </refentryinfo>
 
  <refmeta>
@@ -69,10 +69,12 @@ You have been warned.</para>
 
 <para>Note that the files in the <filename>/etc/apt/preferences.d</filename>
 directory are parsed in alphanumeric ascending order and need to obey the
-following naming convention: The files have no or "<literal>pref</literal>"
-as filename extension and which only contain alphanumeric,  hyphen (-),
-underscore (_) and period (.) characters - otherwise they will be silently
-ignored.</para>
+following naming convention: The files have either no or "<literal>pref</literal>"
+as filename extension and only contain alphanumeric, hyphen (-),
+underscore (_) and period (.) characters.
+Otherwise APT will print a notice that it has ignored a file if the file
+doesn't match a pattern in the <literal>Dir::Ignore-Files-Silently</literal>
+configuration list - in this case it will be silently ignored.</para>
 
 <refsect2><title>APT's Default Priority Assignments</title>
 
@@ -103,12 +105,16 @@ algorithm to set the priorities of the versions of a package.  Assign:
 <varlistentry>
 <term>priority 1</term>
 <listitem><simpara>to the versions coming from archives which in their <filename>Release</filename>
-files are marked as "NotAutomatic: yes" like the debian experimental archive.</simpara></listitem>
+files are marked as "NotAutomatic: yes" but <emphasis>not</emphasis> as "ButAutomaticUpgrades: yes"
+like the debian <literal>experimental</literal> archive.</simpara></listitem>
 </varlistentry>
 
 <varlistentry>
 <term>priority 100</term>
-<listitem><simpara>to the version that is already installed (if any).</simpara></listitem>
+<listitem><simpara>to the version that is already installed (if any) and to the versions coming
+from archives which in their <filename>Release</filename> files are marked as "NotAutomatic: yes" and
+"ButAutomaticUpgrades: yes" like the debian backports archive since <literal>squeeze-backports</literal>.
+</simpara></listitem>
 </varlistentry>
 
 <varlistentry>
@@ -125,9 +131,10 @@ files are marked as "NotAutomatic: yes" like the debian experimental archive.</s
 
 <para>If the target release has not been specified then APT simply assigns
 priority 100 to all installed package versions and priority 500 to all
-uninstalled package versions, expect versions coming from archives which
+uninstalled package versions, except versions coming from archives which
 in their <filename>Release</filename> files are marked as "NotAutomatic: yes" -
-these versions get the priority 1.</para>
+these versions get the priority 1 or priority 100 if it is additionally marked
+as "ButAutomaticUpgrades: yes".</para>
 
 <para>APT then applies the following rules, listed in order of precedence,
 to determine which version of a package to install.
@@ -252,6 +259,50 @@ Pin-Priority: 500
 
 </refsect2>
 
+<refsect2><title>Regular expressions and glob() syntax</title>
+<para>
+APT also supports pinning by glob() expressions and regular
+expressions surrounded by /. For example, the following
+example assigns the priority 500 to all packages from
+experimental where the name starts with gnome (as a glob()-like
+expression) or contains the word kde (as a POSIX extended regular
+expression surrounded by slashes).
+</para>
+
+<programlisting>
+Package: gnome* /kde/
+Pin: release n=experimental
+Pin-Priority: 500
+</programlisting>
+
+<para>
+The rule for those expressions is that they can occur anywhere
+where a string can occur. Thus, the following pin assigns the
+priority 990 to all packages from a release starting with karmic.
+</para>
+
+<programlisting>
+Package: *
+Pin: release n=karmic*
+Pin-Priority: 990
+</programlisting>
+
+<para>
+If a regular expression occurs in a <literal>Package</literal> field,
+the behavior is the same as if this regular expression were replaced
+with a list of all package names it matches. It is undecided whether
+this will change in the future, thus you should always list wild-card
+pins first, so later specific pins override it.
+
+The pattern "<literal>*</literal>" in a Package field is not considered
+a glob() expression in itself.
+</para>
+</refsect2>
+
+
+
+
+
 <refsect2>
 <title>How APT Interprets Priorities</title>
 
@@ -409,7 +460,7 @@ Pin: release n=&testing-codename;
 <varlistentry>
 <term>the <literal>Version:</literal> line</term>
 <listitem><simpara>names the release version.  For example, the
-packages in the tree might belong to Debian GNU/Linux release
+packages in the tree might belong to Debian release
 version 3.0.  Note that there is normally no version number for the
 <literal>testing</literal> and <literal>unstable</literal> distributions because they
 have not been released yet.  Specifying this in the APT preferences