// depexpand_t.cxx

#include <iostream>
#include <stdlib.h>
#include <fstream>
#include <cassert>

using std::string;
using std::cout;
using std::endl;
using std::ifstream;
using std::ofstream;
using std::istream;

void msg(string txt) {
  cout << "--- ";
  cout << txt;
  cout << " ---" << endl;
}

void checkread(istream& out, string exp) {
  string pkg;
  assert( out.good() || out.eof() );
  out >> pkg;
  assert( out.good() || out.eof() );
  if ( pkg == exp ) {
    cout << "|  " << pkg << endl;
  } else {
    cout << "|  " << pkg << " != " << exp << endl;
    assert(false);
  }
}

int runcom(string command) {
  cout << command << endl;
  string fullcom = command;
  fullcom += " >out.dat; echo $? >stat.dat";
  system(fullcom.c_str());
  ifstream fin("stat.dat");
  int stat;
  fin >> stat;
  return stat;
}
  
int depexpand_t() {

  msg("Create directories");
  system("rm -rf dev");
  system("mkdir -p dev/pkg10/spkg11");
  system("mkdir -p dev/pkg10/spkg12");
  system("mkdir -p dev/pkg10/spkg13");
  system("mkdir -p dev/pkg10/spkg14");
  system("mkdir -p dev/pkg10/spkg15");
  system("mkdir -p dev/pkg20");
  ofstream f11("dev/pkg10/spkg11/DEPS");
  ofstream f12("dev/pkg10/spkg12/DEPS");
  ofstream f13("dev/pkg10/spkg13/DEPS");
  ofstream f14("dev/pkg10/spkg14/DEPS");
  ofstream f15("dev/pkg10/spkg15/DEPS");
  ofstream f20("dev/pkg20/DEPS");
  f12 << "pkg10/spkg11" << endl;
  f13 << "pkg10/spkg12" << endl;
  f13 << "pkg20" << endl;
  f20 << "pkg10/spkg11" << endl;
  f20 << "pkg10/spkg12" << endl;
  f14 << "pkg10/spkg15" << endl;
  f15 << "pkg10/spkg14" << endl;

  msg("Expand spkg11");
  assert( runcom("depexpand DEPS pkg10/spkg11 dev dev2") == 0 );
  {
    ifstream fout("out.dat");
    checkread(fout, "pkg10/spkg11");
    checkread(fout, "");
  }

  msg("Expand spkg12");
  assert( runcom("depexpand DEPS pkg10/spkg12 dev dev2") == 0 );
  {
    ifstream fout("out.dat");
    checkread(fout, "pkg10/spkg11");
    checkread(fout, "pkg10/spkg12");
    checkread(fout, "");
  }

  msg("Expand pkg20");
  assert( runcom("depexpand DEPS pkg20 dev dev2") == 0 );
  {
    ifstream fout("out.dat");
    checkread(fout, "pkg10/spkg11");
    checkread(fout, "pkg10/spkg12");
    checkread(fout, "pkg20");
    checkread(fout, "");
  }

  msg("Expand spkg13");
  assert( runcom("depexpand DEPS pkg10/spkg13 dev dev2") == 0 );
  {
    ifstream fout("out.dat");
    checkread(fout, "pkg10/spkg11");
    checkread(fout, "pkg10/spkg12");
    checkread(fout, "pkg20");
    checkread(fout, "pkg10/spkg13");
    checkread(fout, "");
  }

  msg("Expand spkg14 (circular)");
  assert( runcom("depexpand DEPS pkg10/spkg14 dev dev2") != 0 );
  {
    ifstream fout("out.dat");
    checkread(fout, "");
  }

  return 0;
}

#ifdef CTEST_MAIN
int main() {
  return depexpand_t();
}
#endif