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);
-
- // Alternatives in case we can not find our package pin (Bug#512318).
- signed MaxAlt = 0;
- pkgCache::VerIterator PrefAlt;
-
- // 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
- not-automatic sources, except in a single shot not-installed mode.
-
- The user pin is subject to the same priority rules as default
- selections. Thus there are two ways to create a pin - a pin that
- tracks the default when the default is taken away, and a permanent
- pin that stays at that setting.
- */
- bool PrefSeen = false;
- for (pkgCache::VerIterator Ver = Pkg.VersionList(); Ver.end() == false; ++Ver)
- {
- /* Lets see if this version is the installed version */
- bool instVer = (Pkg.CurrentVer() == Ver);
-
- if (Pref == Ver)
- PrefSeen = true;
-
- for (pkgCache::VerFileIterator VF = Ver.FileList(); VF.end() == false; ++VF)
- {
- /* 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 (VF.File().Flagged(pkgCache::Flag::NotSource) && instVer == false)
- continue;
-
- signed Prio = PFPriority[VF.File()->ID];
- if (Prio > Max)
- {
- Pref = Ver;
- Max = Prio;
- PrefSeen = true;
- }
- if (Prio > MaxAlt)
- {
- PrefAlt = Ver;
- MaxAlt = Prio;
- }
- }
-
- if (instVer == true && Max < 1000)
- {
- /* Not having seen the Pref yet means we have a specific pin below 1000
- on a version below the current installed one, so ignore the specific pin
- as this would be a downgrade otherwise */
- if (PrefSeen == false || Pref.end() == true)
- {
- Pref = Ver;
- PrefSeen = true;
- }
- /* Elevate our current selection (or the status file itself) so that only
- a downgrade can override it from now on */
- Max = 999;
-
- // Fast path optimize.
- if (StatusOverride == false)
- break;
- }
- }
- // If we do not find our candidate, use the one with the highest pin.
- // This means that if there is a version available with pin > 0; there
- // will always be a candidate (Closes: #512318)
- if (!Pref.IsGood() && MaxAlt > 0)
- Pref = PrefAlt;
-
- return Pref;
-}
- /*}}}*/
-// Policy::GetCandidateVerNew - 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;
if (!ConsiderFiles)
return 0;
- int priority = std::numeric_limits<int>::min();
+ // priorities are short ints, but we want to pick a value outside the valid range here
+ auto priority = std::numeric_limits<signed int>::min();
for (pkgCache::VerFileIterator file = Ver.FileList(); file.end() == false; file++)
{
/* If this is the status file, and the current version is not the
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) {
- // Ignore
- } else if (GetPriority(file.File()) > priority) {
- priority = GetPriority(file.File());
- }
+ if (file.File().Flagged(pkgCache::Flag::NotSource) && Ver.ParentPkg().CurrentVer() != Ver)
+ priority = std::max(priority, static_cast<decltype(priority)>(-1));
+ else
+ priority = std::max(priority, static_cast<decltype(priority)>(GetPriority(file.File())));
}
- return priority == std::numeric_limits<int>::min() ? 0 : priority;
+ return priority == std::numeric_limits<decltype(priority)>::min() ? 0 : priority;
}
APT_PURE signed short pkgPolicy::GetPriority(pkgCache::PkgFileIterator const &File)
{
bool ReadPinDir(pkgPolicy &Plcy,string Dir)
{
if (Dir.empty() == true)
- Dir = _config->FindDir("Dir::Etc::PreferencesParts");
+ Dir = _config->FindDir("Dir::Etc::PreferencesParts", "/dev/null");
if (DirectoryExists(Dir) == false)
{
- if (Dir != "/dev/null")
+ if (APT::String::Endswith(Dir, "/dev/null") == false)
_error->WarningE("DirectoryExists",_("Unable to read %s"),Dir.c_str());
return true;
}
+ _error->PushToStack();
vector<string> const List = GetListOfFilesInDir(Dir, "pref", true, true);
+ bool const PendingErrors = _error->PendingError();
+ _error->MergeWithStack();
+ if (PendingErrors)
+ return false;
// Read the files
for (vector<string>::const_iterator I = List.begin(); I != List.end(); ++I)
projects / apt.git / blobdiff