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// file : bbot/agent.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2017 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#ifndef _WIN32
# include <signal.h> // signal()
#else
# include <stdlib.h> // getenv(), _putenv()
#endif
#include <iostream>
#include <butl/pager>
#include <bbot/types>
#include <bbot/utility>
#include <bbot/diagnostics>
#include <bbot/agent-options>
using namespace std;
using namespace butl;
using namespace bbot;
int
main (int argc, char* argv[])
try
{
// This is a little hack to make out baseutils for Windows work when called
// with absolute path. In a nutshell, MSYS2's exec*p() doesn't search in the
// parent's executable directory, only in PATH. And since we are running
// without a shell (that would read /etc/profile which sets PATH to some
// sensible values), we are only getting Win32 PATH values. And MSYS2 /bin
// is not one of them. So what we are going to do is add /bin at the end of
// PATH (which will be passed as is by the MSYS2 machinery). This will make
// MSYS2 search in /bin (where our baseutils live). And for everyone else
// this should be harmless since it is not a valid Win32 path.
//
#ifdef _WIN32
{
string mp ("PATH=");
if (const char* p = getenv ("PATH"))
{
mp += p;
mp += ';';
}
mp += "/bin";
_putenv (mp.c_str ());
}
#endif
// On POSIX ignore SIGPIPE which is signaled to a pipe-writing process if
// the pipe reading end is closed. Note that by default this signal
// terminates a process. Also note that there is no way to disable this
// behavior on a file descriptor basis or for the write() function call.
//
#ifndef _WIN32
if (signal (SIGPIPE, SIG_IGN) == SIG_ERR)
fail << "unable to ignore broken pipe (SIGPIPE) signal: "
<< system_error (errno, generic_category ()); // Sanitize.
#endif
cli::argv_scanner scan (argc, argv, true);
agent_options ops (scan);
// Version.
//
if (ops.version ())
{
cout << "bbot-agent " << BBOT_VERSION_STR << endl
<< "libbbot " << LIBBBOT_VERSION_STR << endl
<< "libbutl " << LIBBUTL_VERSION_STR << endl
<< "Copyright (c) 2014-2017 Code Synthesis Ltd" << endl
<< "MIT; see accompanying LICENSE file" << endl;
return 0;
}
// Help.
//
if (ops.help ())
{
pager p ("bbot-agent help", false);
print_bbot_agent_usage (p.stream ());
// If the pager failed, assume it has issued some diagnostics.
//
return p.wait () ? 0 : 1;
}
}
catch (const failed&)
{
return 1; // Diagnostics has already been issued.
}
catch (const cli::exception& e)
{
error << e;
return 1;
}
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