source/tar.cpp

   1 #include <cstring>
   2 #include <msp/fs/stat.h>
   3 #include <msp/fs/utils.h>
   4 #include <msp/io/file.h>
   5 #include <msp/io/print.h>
   6 #include "builder.h"
   7 #include "sourcepackage.h"
   8 #include "tar.h"
   9 #include "tarball.h"
  10
  11 using namespace std;
  12 using namespace Msp;
  13
  14 Tar::Tar(Builder &b):
  15         Tool(b, "TAR")
  16 { }
  17
  18 Target *Tar::create_target(const list<Target *> &sources, const string &arg) const
  19 {
  20         if(!sources.front()->get_package())
  21                 throw invalid_argument("Tar::create_target");
  22
  23         TarBall *tarball = new TarBall(builder, *sources.front()->get_package(), arg);
  24         for(list<Target *>::const_iterator i=sources.begin(); i!=sources.end(); ++i)
  25                 tarball->add_depend(**i);
  26
  27         return tarball;
  28 }
  29
  30 Task *Tar::run(const Target &target) const
  31 {
  32         const TarBall &tarball = dynamic_cast<const TarBall &>(target);
  33         Worker *worker = new Worker(tarball);
  34         return new InternalTask(worker);
  35 }
  36
  37
  38 Tar::Worker::Worker(const TarBall &tb):
  39         tarball(tb)
  40 { }
  41
  42 void Tar::Worker::main()
  43 {
  44         const FS::Path &pkg_src = tarball.get_package()->get_source();
  45         FS::Path basedir = FS::basepart(FS::basename(tarball.get_path()));
  46
  47         IO::File out(tarball.get_path().str(), IO::M_WRITE);
  48         const Target::Dependencies &deps = tarball.get_depends();
  49         for(Target::Dependencies::const_iterator i=deps.begin(); i!=deps.end(); ++i)
  50         {
  51                 FileTarget *ft = dynamic_cast<FileTarget *>(*i);
  52                 if(!ft)
  53                         continue;
  54
  55                 char buf[4096];
  56                 memset(buf, 0, 512);
  57
  58                 string rel_path = (basedir/relative(ft->get_path(), pkg_src)).str();
  59                 if(rel_path.size()>99)
  60                 {
  61                         IO::print("Can't store %s in tar archive - too long name\n", rel_path);
  62                         status = Task::ERROR;
  63                         return;
  64                 }
  65
  66                 memcpy(buf, rel_path.data(), rel_path.size());
  67
  68                 FS::Stat st = FS::stat(ft->get_path());
  69                 store_number(buf+100, 0666, 7);
  70                 store_number(buf+108, 0, 7);
  71                 store_number(buf+116, 0, 7);
  72                 store_number(buf+124, st.get_size(), 11);
  73                 store_number(buf+136, st.get_modify_time().to_unixtime(), 11);
  74                 buf[156] = '0';
  75
  76                 memset(buf+148, ' ', 8);
  77                 unsigned chk = 0;
  78                 for(unsigned j=0; j<512; ++j)
  79                         chk += static_cast<unsigned char>(buf[j]);
  80                 store_number(buf+148, chk, 7);
  81                 buf[155] = 0;
  82
  83                 out.write(buf, 512);
  84                 IO::File in(ft->get_path().str());
  85                 for(unsigned j=0; j<st.get_size(); j+=4096)
  86                 {
  87                         unsigned len = in.read(buf, 4096);
  88                         len += ((~len)+1)&0777;
  89                         out.write(buf, len);
  90                 }
  91         }
  92
  93         status = Task::SUCCESS;
  94 }
  95
  96 void Tar::Worker::store_number(char *buf, unsigned value, unsigned length)
  97 {
  98         for(unsigned i=length; i--;)
  99         {
 100                 buf[i] = '0'+value%8;
 101                 value /= 8;
 102         }
 103 }