add volatile sources support in libapt-pkg

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

diff --git a/apt-pkg/policy.cc b/apt-pkg/policy.cc
index 2d1f2a5d4cd4bb5b9881e1a70844e74df6837420..170da7c6383e26e193604d8c3ec81aefbabefeba 100644 (file)
--- a/apt-pkg/policy.cc
+++ b/apt-pkg/policy.cc
@@ -26,6 +26,7 @@
 #include <apt-pkg/cacheiterators.h>
 #include <apt-pkg/pkgcache.h>
 #include <apt-pkg/versionmatch.h>
+#include <apt-pkg/version.h>
 
 #include <ctype.h>
 #include <stddef.h>
@@ -44,7 +45,7 @@ using namespace std;
 // ---------------------------------------------------------------------
 /* Set the defaults for operation. The default mode with no loaded policy
    file matches the V0 policy engine. */
-pkgPolicy::pkgPolicy(pkgCache *Owner) : Pins(0), PFPriority(0), Cache(Owner)
+pkgPolicy::pkgPolicy(pkgCache *Owner) : Pins(0), PFPriority(0), Cache(Owner), d(NULL)
 {
    if (Owner == 0)
       return;
@@ -131,6 +132,10 @@ bool pkgPolicy::InitDefaults()
    best package is. */
 pkgCache::VerIterator pkgPolicy::GetCandidateVer(pkgCache::PkgIterator const &Pkg)
 {
+   if (_config->FindI("APT::Policy", 1) >= 1) {
+      return GetCandidateVerNew(Pkg);
+   }
+
    // Look for a package pin and evaluate it.
    signed Max = GetPriority(Pkg);
    pkgCache::VerIterator Pref = GetMatch(Pkg);
@@ -217,6 +222,36 @@ pkgCache::VerIterator pkgPolicy::GetCandidateVer(pkgCache::PkgIterator const &Pk
 
    return Pref;
 }
+
+// Policy::GetCandidateVer - Get the candidate install version         /*{{{*/
+// ---------------------------------------------------------------------
+/* Evaluate the package pins and the default list to deteremine what the
+   best package is. */
+pkgCache::VerIterator pkgPolicy::GetCandidateVerNew(pkgCache::PkgIterator const &Pkg)
+{
+   // TODO: Replace GetCandidateVer()
+   pkgCache::VerIterator cand;
+   pkgCache::VerIterator cur = Pkg.CurrentVer();
+   int candPriority = -1;
+   pkgVersioningSystem *vs = Cache->VS;
+
+   for (pkgCache::VerIterator ver = Pkg.VersionList(); ver.end() == false; ver++) {
+      int priority = GetPriority(ver);
+
+        if (priority == 0 || priority <= candPriority)
+           continue;
+
+        // TODO: Maybe optimize to not compare versions
+        if (!cur.end() && priority < 1000
+           && (vs->CmpVersion(ver.VerStr(), cur.VerStr()) < 0))
+           continue;
+
+      candPriority = priority;
+      cand = ver;
+   }
+
+   return cand;
+}
                                                                        /*}}}*/
 // Policy::CreatePin - Create an entry in the pin table..              /*{{{*/
 // ---------------------------------------------------------------------
@@ -341,8 +376,17 @@ APT_PURE signed short pkgPolicy::GetPriority(pkgCache::VerIterator const &Ver)
    int priority = INT_MIN;
    for (pkgCache::VerFileIterator file = Ver.FileList(); file.end() == false; file++)
    {
-        if (GetPriority(file.File()) > priority)
-           priority = GetPriority(file.File());
+      /* If this is the status file, and the current version is not the
+         version in the status file (ie it is not installed, or somesuch)
+         then it is not a candidate for installation, ever. This weeds
+         out bogus entries that may be due to config-file states, or
+         other. */
+      if (file.File().Flagged(pkgCache::Flag::NotSource) && Ver.ParentPkg().CurrentVer() != Ver) {
+        if (priority < 0)
+              priority = 0;
+      } else if (GetPriority(file.File()) > priority) {
+        priority = GetPriority(file.File());
+      }
    }
 
    return priority == INT_MIN ? 0 : priority;
@@ -352,21 +396,6 @@ APT_PURE signed short pkgPolicy::GetPriority(pkgCache::PkgFileIterator const &Fi
    return PFPriority[File->ID];
 }
                                                                        /*}}}*/
-// 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
@@ -411,8 +440,8 @@ bool ReadPinFile(pkgPolicy &Plcy,string File)
    pkgTagFile TF(&Fd);
    if (_error->PendingError() == true)
       return false;
-   
-   PreferenceSection Tags;
+
+   pkgUserTagSection Tags;
    while (TF.Step(Tags) == true)
    {
       // can happen when there are only comments in a record