add APT::FTPArchive::AlwaysStat to disable the too aggressive

caching if versions are build multiply times (not recommend)
Patch by Christoph Goehre, thanks! (Closes: #463260)

4 files changed, 15 insertions, 9 deletions

diff --git a/ftparchive/cachedb.cc b/ftparchive/cachedb.cc
index dfda827b..c352aa53 100644
--- a/ftparchive/cachedb.cc
+++ b/ftparchive/cachedb.cc
@@ -102,9 +102,9 @@ bool CacheDB::OpenFile()
 // ---------------------------------------------------------------------
 /* This gets the size from the database if it's there.  If we need
  * to look at the file, also get the mtime from the file. */
-bool CacheDB::GetFileStat()
+bool CacheDB::GetFileStat(bool const &doStat)
 {
-	if ((CurStat.Flags & FlSize) == FlSize)
+	if ((CurStat.Flags & FlSize) == FlSize && doStat == false)
 	{
 		/* Already worked out the file size */
 	}
@@ -162,7 +162,7 @@ bool CacheDB::GetCurStat()
 // ---------------------------------------------------------------------
 bool CacheDB::GetFileInfo(string FileName, bool DoControl, bool DoContents,
 				bool GenContentsOnly, 
-				bool DoMD5, bool DoSHA1, bool DoSHA256)
+				bool DoMD5, bool DoSHA1, bool DoSHA256, bool const &checkMtime)
 {
 	this->FileName = FileName;
 
@@ -171,14 +171,18 @@ bool CacheDB::GetFileInfo(string FileName, bool DoControl, bool DoContents,
 		return false;
    }   
    OldStat = CurStat;
-	
-	if (GetFileStat() == false)
+
+	if (GetFileStat(checkMtime) == false)
 	{
 		delete Fd;
 		Fd = NULL;
 		return false;	
 	}
 
+    /* if mtime changed, update CurStat from disk */
+    if (checkMtime == true && OldStat.mtime != CurStat.mtime)
+        CurStat.Flags = FlSize;
+
 	Stats.Bytes += CurStat.FileSize;
 	Stats.Packages++;
 
diff --git a/ftparchive/cachedb.h b/ftparchive/cachedb.h
index c10f41ec..15add459 100644
--- a/ftparchive/cachedb.h
+++ b/ftparchive/cachedb.h
@@ -63,7 +63,7 @@ class CacheDB
       return true;
    }
    bool OpenFile();
-   bool GetFileStat();
+   bool GetFileStat(bool const &doStat = false);
    bool GetCurStat();
    bool LoadControl();
    bool LoadContents(bool GenOnly);
@@ -125,7 +125,7 @@ class CacheDB
    
    bool SetFile(string FileName,struct stat St,FileFd *Fd);
    bool GetFileInfo(string FileName, bool DoControl, bool DoContents,
-		   bool GenContentsOnly, bool DoMD5, bool DoSHA1, bool DoSHA256);
+		   bool GenContentsOnly, bool DoMD5, bool DoSHA1, bool DoSHA256, bool const &checkMtime = false);
    bool Finish();   
    
    bool Clean();
diff --git a/ftparchive/writer.cc b/ftparchive/writer.cc
index b2ebdca8..6756021f 100644
--- a/ftparchive/writer.cc
+++ b/ftparchive/writer.cc
@@ -306,6 +306,7 @@ PackagesWriter::PackagesWriter(string DB,string Overrides,string ExtOverrides,
    DoMD5 = _config->FindB("APT::FTPArchive::MD5",true);
    DoSHA1 = _config->FindB("APT::FTPArchive::SHA1",true);
    DoSHA256 = _config->FindB("APT::FTPArchive::SHA256",true);
+   DoAlwaysStat = _config->FindB("APT::FTPArchive::AlwaysStat", false);
    DoContents = _config->FindB("APT::FTPArchive::Contents",true);
    NoOverride = _config->FindB("APT::FTPArchive::NoOverrideMsg",false);
    LongDescription = _config->FindB("APT::FTPArchive::LongDescription",true);
@@ -360,7 +361,7 @@ bool FTWScanner::SetExts(string Vals)
 bool PackagesWriter::DoPackage(string FileName)
 {      
    // Pull all the data we need form the DB
-   if (Db.GetFileInfo(FileName, true, DoContents, true, DoMD5, DoSHA1, DoSHA256) 
+   if (Db.GetFileInfo(FileName, true, DoContents, true, DoMD5, DoSHA1, DoSHA256, DoAlwaysStat)
 		  == false)
    {
       return false;
@@ -753,7 +754,7 @@ ContentsWriter::ContentsWriter(string DB) :
    determine what the package name is. */
 bool ContentsWriter::DoPackage(string FileName,string Package)
 {
-   if (!Db.GetFileInfo(FileName, Package.empty(), true, false, false, false, false))
+   if (!Db.GetFileInfo(FileName, Package.empty(), true, false, false, false, false, false))
    {
       return false;
    }
diff --git a/ftparchive/writer.h b/ftparchive/writer.h
index e7643890..8864461d 100644
--- a/ftparchive/writer.h
+++ b/ftparchive/writer.h
@@ -84,6 +84,7 @@ class PackagesWriter : public FTWScanner
    bool DoMD5;
    bool DoSHA1;
    bool DoSHA256;
+   bool DoAlwaysStat;
    bool NoOverride;
    bool DoContents;
    bool LongDescription;