Clean support

Author: jgg
Date: 1999-02-01 08:11:57 GMT
Clean support

1 files changed, 111 insertions, 0 deletions

diff --git a/apt-pkg/clean.cc b/apt-pkg/clean.cc
new file mode 100644
index 000000000..db47b1cc4
--- /dev/null
+++ b/apt-pkg/clean.cc
@@ -0,0 +1,111 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+// $Id: clean.cc,v 1.1 1999/02/01 08:11:57 jgg Exp $
+/* ######################################################################
+
+   Clean - Clean out downloaded directories
+   
+   ##################################################################### */
+									/*}}}*/
+// Includes								/*{{{*/
+#ifdef __GNUG__
+#pragma implementation "apt-pkg/clean.h"
+#endif
+
+#include <apt-pkg/clean.h>
+#include <apt-pkg/strutl.h>
+#include <apt-pkg/error.h>
+
+#include <dirent.h>
+#include <sys/stat.h>
+#include <unistd.h>
+									/*}}}*/
+
+// ArchiveCleaner::Go - Perform smart cleanup of the archive		/*{{{*/
+// ---------------------------------------------------------------------
+/* Scan the directory for files to erase, we check the version information
+   against our database to see if it is interesting */
+bool pkgArchiveCleaner::Go(string Dir,pkgCache &Cache)
+{
+   DIR *D = opendir(Dir.c_str());   
+   if (D == 0)
+      return _error->Errno("opendir","Unable to read %s",Dir.c_str());
+   
+   string StartDir = SafeGetCWD();
+   if (chdir(Dir.c_str()) != 0)
+   {
+      closedir(D);
+      return _error->Errno("chdir","Unable to change to ",Dir.c_str());
+   }
+   
+   for (struct dirent *Dir = readdir(D); Dir != 0; Dir = readdir(D))
+   {
+      // Skip some files..
+      if (strcmp(Dir->d_name,"lock") == 0 ||
+	  strcmp(Dir->d_name,"partial") == 0 ||
+	  strcmp(Dir->d_name,".") == 0 ||
+	  strcmp(Dir->d_name,"..") == 0)
+	 continue;
+
+      struct stat St;
+      if (stat(Dir->d_name,&St) != 0)
+	 return _error->Errno("stat","Unable to stat %s.",Dir->d_name);
+
+      // Grab the package name
+      const char *I = Dir->d_name;
+      for (; *I != 0 && *I != '_';I++);
+      if (*I != '_')
+	 continue;
+      string Pkg = DeQuoteString(string(Dir->d_name,I-Dir->d_name));
+
+      // Grab the version
+      const char *Start = I + 1;
+      for (I = Start; *I != 0 && *I != '_';I++);
+      if (*I != '_')
+	 continue;
+      string Ver = DeQuoteString(string(Start,I-Start));
+  
+      // Grab the arch
+      Start = I + 1;
+      for (I = Start; *I != 0 && *I != '.' ;I++);
+      if (*I != '.')
+	 continue;
+      string Arch = DeQuoteString(string(Start,I-Start));
+            
+      // Lookup the package
+      pkgCache::PkgIterator P = Cache.FindPkg(Pkg);
+      if (P.end() != true)
+      {
+	 pkgCache::VerIterator V = P.VersionList();
+	 for (; V.end() == false; V++)
+	 {
+	    // See if we can fetch this version at all
+	    bool IsFetchable = false;
+	    for (pkgCache::VerFileIterator J = V.FileList(); 
+		 J.end() == false; J++)
+	    {
+	       if ((J.File()->Flags & pkgCache::Flag::NotSource) != 0)
+		  continue;
+	       IsFetchable = true;
+	       break;
+	    }
+	    
+	    // See if this verison matches the file
+	    if (IsFetchable == true && Ver == V.VerStr())
+	       break;
+	 }
+	 
+	 // We found a match, keep the file
+	 if (V.end() == false)
+	    continue;
+      }
+            
+      Erase(Dir->d_name,Pkg,Ver,St);
+      unlink(Dir->d_name);
+   };
+   
+   chdir(StartDir.c_str());
+   closedir(D);
+   return true;   
+}
+									/*}}}*/