[ABI break] Allow pinning by codename (closes: #97564)

3 files changed, 95 insertions, 6 deletions

diff --git a/doc/apt-get.8.xml b/doc/apt-get.8.xml
index c1b3470ef..c63b2a6c6 100644
--- a/doc/apt-get.8.xml
+++ b/doc/apt-get.8.xml
@@ -53,6 +53,9 @@
 			  <arg choice='plain'>
 				  <replaceable>target_release_number_expression</replaceable>
 			  </arg>
+			  <arg choice='plain'>
+				  <replaceable>target_release_codename</replaceable>
+			  </arg>
 		  </group>
       </arg>
 
@@ -71,6 +74,9 @@
 						<arg choice='plain'>
 							/<replaceable>target_release_name</replaceable>
 						</arg>
+						<arg choice='plain'>
+							/<replaceable>target_release_codename</replaceable>
+						</arg>
 					</group>
 				</arg>
 			 </arg>
@@ -455,7 +461,8 @@
      of this option. In short, this option
      lets you have simple control over which distribution packages will be
      retrieved from. Some common examples might be 
-     <option>-t '2.1*'</option> or <option>-t unstable</option>.
+     <option>-t '2.1*'</option>, <option>-t unstable</option>
+     or <option>-t sid</option>.
      Configuration Item: <literal>APT::Default-Release</literal>;
      see also the &apt-preferences; manual page.</para></listitem>
      </varlistentry>
diff --git a/doc/apt.conf.5.xml b/doc/apt.conf.5.xml
index 74966c5b3..fb2be9a28 100644
--- a/doc/apt.conf.5.xml
+++ b/doc/apt.conf.5.xml
@@ -110,7 +110,7 @@ DPkg::Pre-Install-Pkgs {"/usr/sbin/dpkg-preconfigure --apt";};
      
      <varlistentry><term>Default-Release</term>
 	 <listitem><para>Default release to install packages from if more than one
-	 version available. Contains release name or release version. Examples: 'stable', 'testing', 'unstable', '4.0', '5.0*'. Release codenames ('etch', 'lenny' etc.) are not allowed now. See also &apt-preferences;.</para></listitem>
+	 version available. Contains release name, codename or release version. Examples: 'stable', 'testing', 'unstable', 'lenny', 'squeeze', '4.0', '5.0*'. See also &apt-preferences;.</para></listitem>
      </varlistentry>
      
      <varlistentry><term>Ignore-Hold</term>
diff --git a/doc/apt_preferences.5.xml b/doc/apt_preferences.5.xml
index 162c2f00e..ff63f1dd3 100644
--- a/doc/apt_preferences.5.xml
+++ b/doc/apt_preferences.5.xml
@@ -14,7 +14,7 @@
    &apt-email;
    &apt-product;
    <!-- The last update date -->
-   <date>29 February 2004</date>
+   <date>04 May 2009</date>
  </refentryinfo>
 
  <refmeta>
@@ -191,6 +191,15 @@ Pin-Priority: 50
 </programlisting>
 
 <simpara>The following record assigns a high priority to all package versions
+belonging to any distribution whose Codename is "<literal>squeeze</literal>".</simpara>
+
+<programlisting>
+Package: *
+Pin: release n=squeeze
+Pin-Priority: 900
+</programlisting>
+
+<simpara>The following record assigns a high priority to all package versions
 belonging to any release whose Archive name is "<literal>stable</literal>"
 and whose release Version number is "<literal>3.0</literal>".</simpara>
 
@@ -327,10 +336,11 @@ file are relevant for setting APT priorities:
 
 <variablelist>
 <varlistentry>
-<term>the <literal>Archive:</literal> line</term>
+<term>the <literal>Archive:</literal> or <literal>Suite:</literal> line</term>
 <listitem><simpara>names the archive to which all the packages
 in the directory tree belong.  For example, the line
-"Archive: stable"
+"Archive: stable" or
+"Suite: stable"
 specifies that all of the packages in the directory
 tree below the parent of the <filename>Release</filename> file are in a
 <literal>stable</literal> archive.  Specifying this value in the APT preferences file
@@ -343,6 +353,22 @@ Pin: release a=stable
 </varlistentry>
 
 <varlistentry>
+<term>the <literal>Codename:</literal> line</term>
+<listitem><simpara>names the codename to which all the packages
+in the directory tree belong.  For example, the line
+"Codename: squeeze"
+specifies that all of the packages in the directory
+tree below the parent of the <filename>Release</filename> file belong to a version named
+<literal>squeeze</literal>.  Specifying this value in the APT preferences file
+would require the line:
+</simpara>
+<programlisting>
+Pin: release n=squeeze
+</programlisting>
+</listitem>
+</varlistentry>
+
+<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
@@ -522,7 +548,64 @@ version.
 apt-get install <replaceable>package</replaceable>/unstable
 </programlisting>
 </para>
+</refsect2>
+
+
+<refsect2>
+<title>Tracking the evolution of a codename release</title>
+
+<para>The following APT preferences file will cause APT to assign a
+priority higher than the default (500) to all package versions belonging
+to a specified codename of a distribution and a prohibitively low priority to
+package versions belonging to other <literal>Debian</literal> distributions,
+codenames and archives.
+Note that with this APT preference APT will follow the migration of a release
+from the archive <literal>testing</literal> to <literal>stable</literal> and
+later <literal>oldstable</literal>. If you want to follow for example the progress
+in <literal>testing</literal> notwithstanding the codename changes you should use
+the example configurations above.
+
+<programlisting>
+Explanation: Uninstall or do not install any Debian-originated package versions
+Explanation: other than those in the distribution codenamed with squeeze or sid
+Package: *
+Pin: release n=squeeze
+Pin-Priority: 900
+
+Explanation: Debian unstable is always codenamed with sid
+Package: *
+Pin: release a=sid
+Pin-Priority: 800
+
+Package: *
+Pin: release o=Debian
+Pin-Priority: -10
+</programlisting>
+</para>
+
+<para>With a suitable &sources-list; file and the above preferences file,
+any of the following commands will cause APT to upgrade to the
+latest version(s) in the release codenamed with <literal>squeeze</literal>.
+
+<programlisting>
+apt-get install <replaceable>package-name</replaceable>
+apt-get upgrade
+apt-get dist-upgrade
+</programlisting>
+</para>
+
+<para>The following command will cause APT to upgrade the specified
+package to the latest version from the <literal>sid</literal> distribution.
+Thereafter, <command>apt-get upgrade</command> will upgrade
+the package to the most recent <literal>squeeze</literal> version if that is
+more recent than the installed version, otherwise, to the most recent
+<literal>sid</literal> version if that is more recent than the installed
+version.
 
+<programlisting>
+apt-get install <replaceable>package</replaceable>/sid
+</programlisting>
+</para>
 </refsect2>
 </refsect1>
 
@@ -535,4 +618,3 @@ apt-get install <replaceable>package</replaceable>/unstable
  &manbugs;
 
 </refentry>
-