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// Includes /*{{{*/
#include <apt-pkg/acquire-item.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/mmap.h>
#include <apt-pkg/error.h>
#include <apt-pkg/acquire-method.h>
#include <apt-pkg/strutl.h>
#include <apt-pkg/hashes.h>
#include <apt-pkg/init.h>
#include <sys/stat.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <unistd.h>
#include <utime.h>
#include <stdio.h>
#include <errno.h>
#include <zlib.h>
#include <apti18n.h>
#include <stdlib.h>
#include <iostream>
#include <fstream>
using namespace std;
/*}}}*/
/** \brief DebdeltaMethod - TODO: say something about debdelta here!
* */
class DebdeltaMethod : public pkgAcqMethod {
bool Debug;
string DebdeltaFile;
string FromFile;
string ToFile;
string DebpatchOutput;
protected:
// the main(i.e. most important) method of the debdelta method.
virtual bool Fetch(FetchItem *Itm);
public:
DebdeltaMethod() : pkgAcqMethod("1.1", SingleInstance | SendConfig) {};
void MakeToFile();
};
bool DebdeltaMethod::Fetch(FetchItem *Itm) /*{{{*/
{
/// Testing only...
//FetchResult ResTest;
//ResTest.Filename = "/home/ishan/devel/apt/testrepo/binary/gcc-4.6-base_4.6.0-7_amd64.deb";
//URIDone(ResTest);
//return true;
///
Debug = _config->FindB("Debug::pkgAcquire::Debdelta", false);
FromFile = Itm->DestFile;
URI U(Itm->Uri);
DebdeltaFile = U.Path;
if (flExtension(FromFile) != "deb" || !FileExists(FromFile))
FromFile = "/";
if (!FileExists(DebdeltaFile))
return _error->Error("\n[Debdelta] Could not find a debdelta file.");
MakeToFile();
if (FileExists(ToFile))
return _error->Error("\n[Debdelta] New .deb already exists.");
if (Debug == true)
{
std::cerr << "\n[Debdelta] FromFile: " << FromFile
<< "\n ToFile: " << ToFile
<< "\n DebdelatFile: " << DebdeltaFile << std::endl;
}
int Fd[2];
if (pipe(Fd) != 0)
return _error->Error("[Debdelta] Could not create the pipe.");
_config->Set("APT::Keep-Fds", Fd[0]);
_config->Set("APT::Keep-Fds", Fd[1]);
pid_t Process = ExecFork();
_config->Clear("APT::Keep-Fds", Fd[0]);
_config->Clear("APT::Keep-Fds", Fd[1]);
if (Process == 0)
{
// redirect debpatch's stdout,stderr to the pipe
close(Fd[0]);
close(1);
dup(Fd[1]);
close(2);
dup(Fd[1]);
// make the debpatch command and run it.
int n = 0;
const char* Args[6] = {0};
Args[n++] = "/usr/bin/debpatch";
if (!FileExists(Args[0]))
return _error->Error("[Debdelta] Could not find debpatch.");
Args[n++] = "-A";
Args[n++] = DebdeltaFile.c_str();
Args[n++] = FromFile.c_str();
Args[n++] = ToFile.c_str();
if (Debug == true)
{
std::cerr << "\n[Debdelta] Command:" << std::endl;
std::cerr << Args[0] << " " << Args[1] << " " << Args[2] << " " << Args[3] << " "
<< Args[4] << std::endl;
}
std::cerr << "\n\n[Debdelta] Patching " << ToFile << "..." << std::endl;
execv(Args[0], (char **)Args);
return _error->Error("[Debdelta] Could not execv debpatch.");
}
if (ExecWait(Process, "debpatch", false))
{
// read the stderr,stdout outputs of debpatch
size_t LineSize = 1024;
char *Line = (char *)malloc(LineSize + 1);
close(Fd[1]);
FILE *fp = fdopen(Fd[0], "r");
DebpatchOutput = "";
while (getline(&Line, &LineSize, fp) != EOF)
DebpatchOutput += string(Line);
fclose(fp);
if (!FileExists(ToFile))
return _error->Error("\n[Debdelta] Failed to patch %s", ToFile.c_str());
// move the .deb to Dir::Cache::Archives
string FinalFile = _config->FindDir("Dir::Cache::Archives") + flNotDir(ToFile);
Rename(ToFile, FinalFile);
ToFile = FinalFile;
FetchResult Res;
Res.Filename = ToFile;
if (Queue != 0)
URIDone(Res);
else
std::cout << "Filename: " << Res.Filename << std::endl;
return true;
}
return false;
}
void DebdeltaMethod::MakeToFile()
{
string DebdeltaName = flNotDir(DebdeltaFile);
int NewBegin = DebdeltaName.find("_", 0);
string PkgName = DebdeltaName.substr(0, NewBegin);
NewBegin = DebdeltaName.find("_", NewBegin + 1);
int NewEnd = DebdeltaName.find("_", NewBegin + 1);
string NewVersion = DebdeltaName.substr(NewBegin + 1, NewEnd - NewBegin - 1);
string Arch = DebdeltaName.substr(NewEnd + 1, DebdeltaName.find(".", NewEnd + 1) - NewEnd - 1);
ToFile = _config->FindDir("Dir::Cache::Archives") + "partial/"
+ PkgName + "_" + NewVersion + "_" + Arch + ".deb";
}
/*}}}*/
/** \brief Wrapper class for testing debdelta */ /*{{{*/
class TestDebdeltaMethod : public DebdeltaMethod {
public:
/** \brief Run debdelta in debug test mode
*
* This method can be used to run the debdelta method outside
* of the "normal" acquire environment for easier testing.
*
* \param base basename of all files involved in this debdelta test
*/
bool Run(char const *DebdeltaFile, char const *FromFile)
{
if (pkgInitConfig(*_config) == false ||
pkgInitSystem(*_config,_system) == false)
{
std::cerr << "[Debdelta] E: Could not initialize the system/configuration." << std::endl;
_error->DumpErrors();
return 100;
}
_config->CndSet("Debug::pkgAcquire::Debdetla", "true");
FetchItem *Test = new FetchItem;
Test->DestFile = FromFile;
Test->Uri = "debdelta://" + string(DebdeltaFile);
Test->FailIgnore = false;
Test->IndexFile = false;
Test->Next = 0;
return Fetch(Test);
}
};
/*}}}*/
/** \brief Starter for the debdelta method (or its test method) {{{
*
* Used without parameters is the normal behavior for methods for
* the APT acquire system. While this works great for the acquire system
* it is very hard to test the method and therefore the method also
* accepts one parameter which will switch it directly to debug test mode:
*/
int main(int argc, char *argv[])
{
if (argc <= 1)
{
DebdeltaMethod Mth;
return Mth.Run();
}
else
{
TestDebdeltaMethod Mth;
bool result = Mth.Run(argv[1], argv[2]);
_error->DumpErrors();
return result;
}
}
/*}}}*/
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