1 files changed, 102 insertions, 0 deletions
diff --git a/bbot/agent.cxx b/bbot/agent.cxx
new file mode 100644
index 0000000..54940f4
--- /dev/null
+++ b/bbot/agent.cxx
@@ -0,0 +1,102 @@
+// 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/bbot-version>
+
+#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;
+}