source/copy.cpp

   1 /* $Id$
   2
   3 This file is part of builder
   4 Copyright © 2006-2007 Mikko Rasa, Mikkosoft Productions
   5 Distributed under the LGPL
   6 */
   7
   8 #include <errno.h>
   9 #include <fstream>
  10 #include <iostream>
  11 #include <msp/fs/dir.h>
  12 #include <msp/fs/stat.h>
  13 #include <msp/fs/utils.h>
  14 #include "builder.h"
  15 #include "copy.h"
  16 #include "package.h"
  17
  18 using namespace std;
  19 using namespace Msp;
  20
  21 Copy::Copy(Builder &b, const Package &pkg, const FS::Path &s, const FS::Path &d):
  22         InternalAction(b),
  23         src(s),
  24         dest(d)
  25 {
  26         announce(pkg.get_name(), "COPY", dest[-1]);
  27         if(builder.get_verbose()>=2)
  28                 cout<<s<<" -> "<<d<<'\n';
  29
  30         if(!builder.get_dry_run())
  31                 worker=new Worker(*this);
  32 }
  33
  34
  35 Copy::Worker::Worker(Copy &c):
  36         copy(c)
  37 {
  38         launch();
  39 }
  40
  41 void Copy::Worker::main()
  42 {
  43         FS::mkpath(FS::dirname(copy.dest), 0755);
  44
  45         try
  46         {
  47                 // Remove old file.  Not doing this would cause Bad Stuff when installing libraries.
  48                 unlink(copy.dest);
  49         }
  50         catch(const SystemError &e)
  51         {
  52                 if(e.get_error_code()!=ENOENT)
  53                 {
  54                         cerr<<e.what()<<'\n';
  55                         done=error=true;
  56                         return;
  57                 }
  58         }
  59
  60         ifstream in(copy.src.str().c_str());
  61         if(!in)
  62         {
  63                 cerr<<"Can't open "<<copy.src<<" for reading\n";
  64                 done=error=true;
  65                 return;
  66         }
  67
  68         ofstream out(copy.dest.str().c_str());
  69         if(!out)
  70         {
  71                 cerr<<"Can't open "<<copy.dest<<" for writing\n";
  72                 done=error=true;
  73                 return;
  74         }
  75
  76         // Actual transfer loop
  77         char buf[16384];
  78         while(!in.eof())
  79         {
  80                 in.read(buf, sizeof(buf));
  81                 out.write(buf, in.gcount());
  82         }
  83
  84         // Preserve file permissions
  85         struct stat st=FS::stat(copy.src);
  86         chmod(copy.dest.str().c_str(), st.st_mode&0777);
  87
  88         done=true;
  89 }