* [BREAK] merged lp:~mvo/apt/history

[apt.git] / apt-pkg / policy.cc

diff --git a/apt-pkg/policy.cc b/apt-pkg/policy.cc
index 8b083fd444aa80e8d8b9c4314a12a7802c879470..f9901bc9af183c1e1c6e669730e22356f483307f 100644 (file)
--- a/apt-pkg/policy.cc
+++ b/apt-pkg/policy.cc
@@ -27,9 +27,10 @@
 #include <apt-pkg/configuration.h>
 #include <apt-pkg/tagfile.h>
 #include <apt-pkg/strutl.h>
+#include <apt-pkg/fileutl.h>
 #include <apt-pkg/error.h>
 #include <apt-pkg/sptr.h>
-    
+
 #include <apti18n.h>
 
 #include <iostream>
@@ -120,6 +121,14 @@ pkgCache::VerIterator pkgPolicy::GetCandidateVer(pkgCache::PkgIterator Pkg)
    signed Max = GetPriority(Pkg);
    pkgCache::VerIterator Pref = GetMatch(Pkg);
 
+   // no package = no candidate version
+   if (Pkg.end() == true)
+      return Pref;
+
+   // packages with a pin lower than 0 have no newer candidate than the current version
+   if (Max < 0)
+      return Pkg.CurrentVer();
+
    /* Falling through to the default version.. Setting Max to zero
       effectively excludes everything <= 0 which are the non-automatic
       priorities.. The status file is given a prio of 100 which will exclude
@@ -239,7 +248,47 @@ signed short pkgPolicy::GetPriority(pkgCache::PkgIterator const &Pkg)
    return 0;
 }
                                                                        /*}}}*/
+// PreferenceSection class - Overriding the default TrimRecord method  /*{{{*/
+// ---------------------------------------------------------------------
+/* The preference file is a user generated file so the parser should
+   therefore be a bit more friendly by allowing comments and new lines
+   all over the place rather than forcing a special format */
+class PreferenceSection : public pkgTagSection
+{
+   void TrimRecord(bool BeforeRecord, const char* &End)
+   {
+      for (; Stop < End && (Stop[0] == '\n' || Stop[0] == '\r' || Stop[0] == '#'); Stop++)
+        if (Stop[0] == '#')
+           Stop = (const char*) memchr(Stop,'\n',End-Stop);
+   }
+};
+                                                                       /*}}}*/
+// ReadPinDir - Load the pin files from this dir into a Policy         /*{{{*/
+// ---------------------------------------------------------------------
+/* This will load each pin file in the given dir into a Policy. If the
+   given dir is empty the dir set in Dir::Etc::PreferencesParts is used.
+   Note also that this method will issue a warning if the dir does not
+   exists but it will return true in this case! */
+bool ReadPinDir(pkgPolicy &Plcy,string Dir)
+{
+   if (Dir.empty() == true)
+      Dir = _config->FindDir("Dir::Etc::PreferencesParts");
+
+   if (FileExists(Dir) == false)
+   {
+      _error->WarningE("FileExists",_("Unable to read %s"),Dir.c_str());
+      return true;
+   }
 
+   vector<string> const List = GetListOfFilesInDir(Dir, "pref", true, true);
+
+   // Read the files
+   for (vector<string>::const_iterator I = List.begin(); I != List.end(); I++)
+      if (ReadPinFile(Plcy, *I) == false)
+        return false;
+   return true;
+}
+                                                                       /*}}}*/
 // ReadPinFile - Load the pin file into a Policy                       /*{{{*/
 // ---------------------------------------------------------------------
 /* I'd like to see the preferences file store more than just pin information
@@ -259,12 +308,12 @@ bool ReadPinFile(pkgPolicy &Plcy,string File)
    if (_error->PendingError() == true)
       return false;
    
-   pkgTagSection Tags;
+   PreferenceSection Tags;
    while (TF.Step(Tags) == true)
    {
       string Name = Tags.FindS("Package");
       if (Name.empty() == true)
-        return _error->Error(_("Invalid record in the preferences file, no Package header"));
+        return _error->Error(_("Invalid record in the preferences file %s, no Package header"), File.c_str());
       if (Name == "*")
         Name = string();