* make apt-get source smarter about not downloading the same sources twice

[apt.git] / cmdline / apt-get.cc

diff --git a/cmdline/apt-get.cc b/cmdline/apt-get.cc
index 3475d79aed757f9f1dfd71e5ff344c982c22e46d..5ff6d2f8f3a5c6a0804dbdffdcf8949abda2bfa2 100644 (file)
--- a/cmdline/apt-get.cc
+++ b/cmdline/apt-get.cc
@@ -38,6 +38,7 @@
 #include <apt-pkg/version.h>
 #include <apt-pkg/cachefile.h>
 #include <apt-pkg/sptr.h>
+#include <apt-pkg/md5.h>
 #include <apt-pkg/versionmatch.h>
     
 #include <config.h>
@@ -45,6 +46,7 @@
 
 #include "acqprogress.h"
 
+#include <set>
 #include <locale.h>
 #include <langinfo.h>
 #include <fstream>
@@ -1200,7 +1202,7 @@ pkgSrcRecords::Parser *FindSrc(const char *Name,pkgRecords &Recs,
       VerTag = string(TmpSrc.begin() + Slash + 1,TmpSrc.end());
       TmpSrc = string(TmpSrc.begin(),TmpSrc.begin() + Slash);
    } 
-   else  if(DefRel.empty() == false) 
+   else  if(!Pkg.end() && DefRel.empty() == false)
    {
       // we have a default release, try to locate the pkg. we do it like
       // this because GetCandidateVer() will not "downgrade", that means
@@ -1899,6 +1901,9 @@ bool DoSource(CommandLine &CmdL)
 
    DscFile *Dsc = new DscFile[CmdL.FileSize()];
    
+   // insert all downloaded uris into this set to avoid downloading them
+   // twice
+   set<string> queued;
    // Load the requestd sources into the fetcher
    unsigned J = 0;
    for (const char **I = CmdL.FileList + 1; *I != 0; I++, J++)
@@ -1935,7 +1940,28 @@ bool DoSource(CommandLine &CmdL)
         if (_config->FindB("APT::Get::Tar-Only",false) == true &&
             I->Type != "tar")
            continue;
-        
+
+        // don't download the same uri twice (should this be moved to
+        // the fetcher interface itself?)
+        if(queued.find(Last->Index().ArchiveURI(I->Path)) != queued.end())
+           continue;
+        queued.insert(Last->Index().ArchiveURI(I->Path));
+           
+        // check if we have a file with that md5 sum already localy
+        if(!I->MD5Hash.empty() && FileExists(flNotDir(I->Path)))  
+        {
+           FileFd Fd(flNotDir(I->Path), FileFd::ReadOnly);
+           MD5Summation sum;
+           sum.AddFD(Fd.Fd(), Fd.Size());
+           Fd.Close();
+           if((string)sum.Result() == I->MD5Hash) 
+           {
+              ioprintf(c1out,_("Skiping already downloaded file '%s'\n"),
+                       flNotDir(I->Path).c_str());
+              continue;
+           }
+        }
+
         new pkgAcqFile(&Fetcher,Last->Index().ArchiveURI(I->Path),
                        I->MD5Hash,I->Size,
                        Last->Index().SourceInfo(*Last,*I),Src);