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)
  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_dependency(**i);
  26
  27         tarball->set_tool(*this);
  28
  29         return tarball;
  30 }
  31
  32 Task *Tar::run(const Target &target) const
  33 {
  34         const TarBall &tarball = dynamic_cast<const TarBall &>(target);
  35         Worker *worker = new Worker(tarball);
  36         return new InternalTask(worker);
  37 }
  38
  39
  40 Tar::Worker::Worker(const TarBall &tb):
  41         tarball(tb)
  42 { }
  43
  44 void Tar::Worker::main()
  45 {
  46         const FS::Path &pkg_src = tarball.get_package()->get_source_directory();
  47         FS::Path basedir = FS::basepart(FS::basename(tarball.get_path()));
  48
  49         IO::File out(tarball.get_path().str(), IO::M_WRITE);
  50         const Target::Dependencies &deps = tarball.get_dependencies();
  51         for(Target::Dependencies::const_iterator i=deps.begin(); i!=deps.end(); ++i)
  52         {
  53                 FileTarget *ft = dynamic_cast<FileTarget *>(*i);
  54                 if(!ft)
  55                         continue;
  56
  57                 char buf[4096];
  58                 memset(buf, 0, 512);
  59
  60                 string rel_path = (basedir/relative(ft->get_path(), pkg_src)).str();
  61                 if(rel_path.size()>99)
  62                 {
  63                         IO::print("Can't store %s in tar archive - too long name\n", rel_path);
  64                         status = Task::ERROR;
  65                         return;
  66                 }
  67
  68                 memcpy(buf, rel_path.data(), rel_path.size());
  69
  70                 FS::Stat st = FS::stat(ft->get_path());
  71                 store_number(buf+100, 0666, 7);
  72                 store_number(buf+108, 0, 7);
  73                 store_number(buf+116, 0, 7);
  74                 store_number(buf+124, st.get_size(), 11);
  75                 store_number(buf+136, st.get_modify_time().to_unixtime(), 11);
  76                 buf[156] = '0';
  77
  78                 memset(buf+148, ' ', 8);
  79                 unsigned chk = 0;
  80                 for(unsigned j=0; j<512; ++j)
  81                         chk += static_cast<unsigned char>(buf[j]);
  82                 store_number(buf+148, chk, 7);
  83                 buf[155] = 0;
  84
  85                 out.write(buf, 512);
  86                 IO::File in(ft->get_path().str());
  87                 for(unsigned j=0; j<st.get_size(); j+=4096)
  88                 {
  89                         unsigned len = in.read(buf, 4096);
  90                         len += ((~len)+1)&0777;
  91                         out.write(buf, len);
  92                 }
  93         }
  94
  95         status = Task::SUCCESS;
  96 }
  97
  98 void Tar::Worker::store_number(char *buf, unsigned value, unsigned length)
  99 {
 100         for(unsigned i=length; i--;)
 101         {
 102                 buf[i] = '0'+value%8;
 103                 value /= 8;
 104         }
 105 }