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/path/utils.h>
  12 #include "builder.h"
  13 #include "copy.h"
  14 #include "package.h"
  15
  16 using namespace std;
  17 using namespace Msp;
  18
  19 Copy::Copy(Builder &b, const Package &pkg, const Path::Path &s, const Path::Path &d):
  20         InternalAction(b),
  21         src(s),
  22         dest(d)
  23 {
  24         announce(pkg.get_name(), "COPY", dest[-1]);
  25         if(builder.get_verbose()>=2)
  26                 cout<<s<<" -> "<<d<<'\n';
  27
  28         if(!builder.get_dry_run())
  29                 worker=new Worker(*this);
  30 }
  31
  32
  33 Copy::Worker::Worker(Copy &c):
  34         copy(c)
  35 {
  36         launch();
  37 }
  38
  39 void Copy::Worker::main()
  40 {
  41         Path::mkpath(copy.dest.subpath(0, copy.dest.size()-1), 0755);
  42
  43         // Remove old file.  Not doing this would cause Bad Stuff when installing libraries.
  44         if(unlink(copy.dest.str().c_str())<0 && errno!=ENOENT)
  45         {
  46                 int err=errno;
  47                 cerr<<"Can't unlink "<<copy.dest<<": "<<strerror(err)<<'\n';
  48                 done=error=true;
  49                 return;
  50         }
  51
  52         ifstream in(copy.src.str().c_str());
  53         if(!in)
  54         {
  55                 cerr<<"Can't open "<<copy.src<<" for reading\n";
  56                 done=error=true;
  57                 return;
  58         }
  59
  60         ofstream out(copy.dest.str().c_str());
  61         if(!out)
  62         {
  63                 cerr<<"Can't open "<<copy.dest<<" for writing\n";
  64                 done=error=true;
  65                 return;
  66         }
  67
  68         // Actual transfer loop
  69         char buf[16384];
  70         while(!in.eof())
  71         {
  72                 in.read(buf, sizeof(buf));
  73                 out.write(buf, in.gcount());
  74         }
  75
  76         // Preserve file permissions
  77         struct stat st;
  78         Path::stat(copy.src, st);
  79         chmod(copy.dest.str().c_str(), st.st_mode&0777);
  80
  81         done=true;
  82 }