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 &s, const 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         mkpath(copy.dest.subpath(0, copy.dest.size()-1), 0755);
  42
  43         try
  44         {
  45                 // Remove old file.  Not doing this would cause Bad Stuff when installing libraries.
  46                 unlink(copy.dest);
  47         }
  48         catch(const SystemError &e)
  49         {
  50                 if(e.get_error_code()!=ENOENT)
  51                 {
  52                         cerr<<e.what()<<'\n';
  53                         done=error=true;
  54                         return;
  55                 }
  56         }
  57
  58         ifstream in(copy.src.str().c_str());
  59         if(!in)
  60         {
  61                 cerr<<"Can't open "<<copy.src<<" for reading\n";
  62                 done=error=true;
  63                 return;
  64         }
  65
  66         ofstream out(copy.dest.str().c_str());
  67         if(!out)
  68         {
  69                 cerr<<"Can't open "<<copy.dest<<" for writing\n";
  70                 done=error=true;
  71                 return;
  72         }
  73
  74         // Actual transfer loop
  75         char buf[16384];
  76         while(!in.eof())
  77         {
  78                 in.read(buf, sizeof(buf));
  79                 out.write(buf, in.gcount());
  80         }
  81
  82         // Preserve file permissions
  83         struct stat st=stat(copy.src);
  84         chmod(copy.dest.str().c_str(), st.st_mode&0777);
  85
  86         done=true;
  87 }