[apt-pkg] allow also codenames for specifying a release

* MatchType::Release checks first for archive than for codename equality
* new n= option in apt_preference to be able to pin based on a codeName

apt-pkg/cacheiterators.h

@@ -333,6 +333,7 @@ class pkgCache::PkgFileIterator
    inline const char *Component() const {return File->Component == 0?0:Owner->StrP + File->Component;};
    inline const char *Version() const {return File->Version == 0?0:Owner->StrP + File->Version;};
    inline const char *Origin() const {return File->Origin == 0?0:Owner->StrP + File->Origin;};
+   inline const char *Codename() const {return File->Codename ==0?0:Owner->StrP + File->Codename;};
    inline const char *Label() const {return File->Label == 0?0:Owner->StrP + File->Label;};
    inline const char *Site() const {return File->Site == 0?0:Owner->StrP + File->Site;};
    inline const char *Architecture() const {return File->Architecture == 0?0:Owner->StrP + File->Architecture;};

apt-pkg/deb/deblistparser.cc

@@ -637,6 +637,8 @@ bool debListParser::LoadReleaseInfo(pkgCache::PkgFileIterator FileI,
       FileI->Version = WriteUniqString(Start,Stop - Start);
    if (Section.Find("Origin",Start,Stop) == true)
       FileI->Origin = WriteUniqString(Start,Stop - Start);
+   if (Section.Find("Codename",Start,Stop) == true)
+      FileI->Codename = WriteUniqString(Start,Stop - Start);
    if (Section.Find("Label",Start,Stop) == true)
       FileI->Label = WriteUniqString(Start,Stop - Start);
    if (Section.Find("Architecture",Start,Stop) == true)

apt-pkg/pkgcache.cc

@@ -607,6 +607,8 @@ string pkgCache::PkgFileIterator::RelStr()
       Res = Res + (Res.empty() == true?"o=":",o=")  + Origin();
    if (Archive() != 0)
       Res = Res + (Res.empty() == true?"a=":",a=")  + Archive();
+   if (Codename() != 0)
+      Res = Res + (Res.empty() == true?"n=":",n=")  + Codename();
    if (Label() != 0)
       Res = Res + (Res.empty() == true?"l=":",l=")  + Label();
    if (Component() != 0)

apt-pkg/pkgcache.h

@@ -223,6 +223,7 @@ struct pkgCache::PackageFile
    // Names
    map_ptrloc FileName;        // Stringtable
    map_ptrloc Archive;         // Stringtable
+   map_ptrloc Codename;        // Stringtable
    map_ptrloc Component;       // Stringtable
    map_ptrloc Version;         // Stringtable
    map_ptrloc Origin;          // Stringtable

apt-pkg/versionmatch.cc

@@ -63,8 +63,8 @@ pkgVersionMatch::pkgVersionMatch(string Data,MatchType Type) : Type(Type)
 	 if (isdigit(Data[0]))
 	    RelVerStr = Data;
 	 else
-	    RelArchive = Data;
-	 
+	    RelRelease = Data;
+
 	 if (RelVerStr.length() > 0 && RelVerStr.end()[-1] == '*')
 	 {
 	    RelVerPrefixMatch = true;
@@ -87,19 +87,21 @@ pkgVersionMatch::pkgVersionMatch(string Data,MatchType Type) : Type(Type)
       {
 	 if (strlen(Fragments[J]) < 3)
 	    continue;
-	    
+
 	 if (stringcasecmp(Fragments[J],Fragments[J]+2,"v=") == 0)
 	    RelVerStr = Fragments[J]+2;
 	 else if (stringcasecmp(Fragments[J],Fragments[J]+2,"o=") == 0)
 	    RelOrigin = Fragments[J]+2;
 	 else if (stringcasecmp(Fragments[J],Fragments[J]+2,"a=") == 0)
 	    RelArchive = Fragments[J]+2;
+	 else if (stringcasecmp(Fragments[J],Fragments[J]+2,"n=") == 0)
+	    RelCodename = Fragments[J]+2;
 	 else if (stringcasecmp(Fragments[J],Fragments[J]+2,"l=") == 0)
 	    RelLabel = Fragments[J]+2;
 	 else if (stringcasecmp(Fragments[J],Fragments[J]+2,"c=") == 0)
 	    RelComponent = Fragments[J]+2;
       }
-      
+
       if (RelVerStr.end()[-1] == '*')
       {
 	 RelVerPrefixMatch = true;
@@ -169,15 +171,16 @@ bool pkgVersionMatch::FileMatch(pkgCache::PkgFileIterator File)
    {
       if (MatchAll == true)
 	 return true;
-      
+
 /*      cout << RelVerStr << ',' << RelOrigin << ',' << RelArchive << ',' << RelLabel << endl;
       cout << File.Version() << ',' << File.Origin() << ',' << File.Archive() << ',' << File.Label() << endl;*/
-      
+
       if (RelVerStr.empty() == true && RelOrigin.empty() == true &&
 	  RelArchive.empty() == true && RelLabel.empty() == true &&
+	  RelRelease.empty() == true && RelCodename.empty() == true &&
 	  RelComponent.empty() == true)
 	 return false;
-      
+
       if (RelVerStr.empty() == false)
 	 if (File->Version == 0 ||
 	     MatchVer(File.Version(),RelVerStr,RelVerPrefixMatch) == false)
@@ -187,11 +190,19 @@ bool pkgVersionMatch::FileMatch(pkgCache::PkgFileIterator File)
 	     stringcasecmp(RelOrigin,File.Origin()) != 0)
 	    return false;
       if (RelArchive.empty() == false)
-      {
-	 if (File->Archive == 0 || 
+	 if (File->Archive == 0 ||
 	     stringcasecmp(RelArchive,File.Archive()) != 0)
-	    return false;
-      }      
+            return false;
+      if (RelCodename.empty() == false)
+	 if (File->Codename == 0 ||
+	     stringcasecmp(RelCodename,File.Codename()) != 0)
+            return false;
+      if (RelRelease.empty() == false)
+	 if ((File->Archive == 0 ||
+	     stringcasecmp(RelRelease,File.Archive()) != 0) &&
+             (File->Codename == 0 ||
+	      stringcasecmp(RelRelease,File.Codename()) != 0))
+	       return false;
       if (RelLabel.empty() == false)
 	 if (File->Label == 0 ||
 	     stringcasecmp(RelLabel,File.Label()) != 0)
@@ -202,7 +213,7 @@ bool pkgVersionMatch::FileMatch(pkgCache::PkgFileIterator File)
 	    return false;
       return true;
    }
-   
+
    if (Type == Origin)
    {
       if (OrSite.empty() == false) {
@@ -213,7 +224,7 @@ bool pkgVersionMatch::FileMatch(pkgCache::PkgFileIterator File)
 	    return false;
       return (OrSite == File.Site());		/* both strings match */
    }
-   
+
    return false;
 }
 									/*}}}*/

apt-pkg/versionmatch.h

@@ -3,29 +3,32 @@
 // $Id: versionmatch.h,v 1.4 2001/05/29 03:07:12 jgg Exp $
 /* ######################################################################
 
-   Version Matching 
-   
+   Version Matching
+
    This module takes a matching string and a type and locates the version
    record that satisfies the constraint described by the matching string.
 
      Version: 1.2*
      Release: o=Debian,v=2.1*,c=main
      Release: v=2.1*
+     Release: a=testing
+     Release: n=squeeze
      Release: *
      Origin: ftp.debian.org
-   
+
    Release may be a complex type that can specify matches for any of:
       Version (v= with prefix)
       Origin (o=)
-      Archive (a=)
+      Archive (a=) eg, unstable, testing, stable
+      Codename (n=) e.g. etch, lenny, squeeze, sid
       Label (l=)
       Component (c=)
    If there are no equals signs in the string then it is scanned in short
-   form - if it starts with a number it is Version otherwise it is an 
-   Archive.
-   
+   form - if it starts with a number it is Version otherwise it is an
+   Archive or a Codename.
+
    Release may be a '*' to match all releases.
-   
+
    ##################################################################### */
 									/*}}}*/
 #ifndef PKGLIB_VERSIONMATCH_H
@@ -47,6 +50,8 @@ class pkgVersionMatch
    string RelVerStr;
    bool RelVerPrefixMatch;
    string RelOrigin;
+   string RelRelease;
+   string RelCodename;
    string RelArchive;
    string RelLabel;
    string RelComponent;

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>

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>

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>
@@ -190,6 +190,15 @@ Pin: release a=unstable
 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
@@ -342,6 +352,22 @@ Pin: release a=stable
 </listitem>
 </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
@@ -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>
-