source/copy.cpp

   1 #include <unistd.h>
   2 #include <sys/stat.h>
   3 #include <msp/fs/dir.h>
   4 #include <msp/fs/stat.h>
   5 #include <msp/fs/utils.h>
   6 #include <msp/io/file.h>
   7 #include <msp/io/print.h>
   8 #include "builder.h"
   9 #include "copy.h"
  10 #include "installedfile.h"
  11
  12 using namespace std;
  13 using namespace Msp;
  14
  15 Copy::Copy(Builder &b):
  16         Tool(b, "CP")
  17 { }
  18
  19 Target *Copy::create_target(const list<Target *> &sources, const string &arg)
  20 {
  21         FileTarget &file_tgt = dynamic_cast<FileTarget &>(*sources.front());
  22         InstalledFile *inst = new InstalledFile(builder, *file_tgt.get_package(), file_tgt, arg);
  23         inst->set_tool(*this);
  24         return inst;
  25 }
  26
  27 Task *Copy::run(const Target &target) const
  28 {
  29         const InstalledFile &install = dynamic_cast<const InstalledFile &>(target);
  30         Worker *worker = new Worker(install);
  31         InternalTask *task = new InternalTask(worker);
  32         task->add_file(install.get_path());
  33         task->set_unlink();
  34         return task;
  35 }
  36
  37
  38 Copy::Worker::Worker(const InstalledFile &t):
  39         target(t)
  40 { }
  41
  42 void Copy::Worker::main()
  43 {
  44         const FileTarget &source = target.get_source();
  45         const FS::Path &src_path = source.get_path();
  46         const FS::Path &dst_path = target.get_path();
  47
  48         try
  49         {
  50                 IO::File in(src_path.str());
  51                 IO::File out(dst_path.str(), IO::M_WRITE);
  52
  53                 // Actual transfer loop
  54                 char buf[16384];
  55                 while(!in.eof())
  56                 {
  57                         unsigned len = in.read(buf, sizeof(buf));
  58                         out.write(buf, len);
  59                 }
  60         }
  61         catch(const exception &e)
  62         {
  63                 IO::print(IO::cerr, "%s\n", e.what());
  64                 status = Task::ERROR;
  65                 return;
  66         }
  67
  68         // Preserve file permissions
  69         struct stat st;
  70         if(stat(src_path.str().c_str(), &st)==0)
  71                 chmod(dst_path.str().c_str(), st.st_mode&0777);
  72
  73         const FS::Path &link = target.get_symlink();
  74         if(!link.empty())
  75         {
  76                 FS::Path relpath = FS::relative(dst_path, FS::dirname(link));
  77                 if(FS::exists(link))
  78                         FS::unlink(link);
  79                 symlink(relpath.str().c_str(), link.str().c_str());
  80         }
  81
  82         status = Task::SUCCESS;
  83 }