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// file : build/b.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2015 Code Synthesis Tools CC
// license : MIT; see accompanying LICENSE file
#include <time.h> // tzset()
#include <string.h> // strerror()
#include <stdlib.h> // getenv()
#include <unistd.h> // getuid()
#include <sys/types.h> // uid_t
#include <pwd.h> // struct passwd, getpwuid()
#include <vector>
#include <cassert>
#include <fstream>
#include <iostream> //@@ TMP, for dump()
#include <typeinfo>
#include <system_error>
#include <build/scope>
#include <build/target>
#include <build/prerequisite>
#include <build/rule>
#include <build/algorithm>
#include <build/process>
#include <build/diagnostics>
#include <build/context>
#include <build/utility>
#include <build/dump>
#include <build/lexer>
#include <build/parser>
using namespace std;
namespace build
{
void
dump ()
{
cout << endl;
for (const auto& pt: targets)
{
target& t (*pt);
cout << t << ':';
for (const auto& p: t.prerequisites)
{
cout << ' ' << p;
}
cout << endl;
}
cout << endl;
}
}
#include <build/native>
#include <build/cxx/target>
#include <build/cxx/rule>
using namespace build;
int
main (int argc, char* argv[])
{
try
{
tracer trace ("main");
// Initialize time conversion data that is used by localtime_r().
//
tzset ();
// Trace verbosity.
//
verb = 5;
// Register target types.
//
target_types.insert (file::static_type);
target_types.insert (dir::static_type);
target_types.insert (fsdir::static_type);
target_types.insert (exe::static_type);
target_types.insert (obj::static_type);
target_types.insert (cxx::h::static_type);
target_types.insert (cxx::c::static_type);
target_types.insert (cxx::cxx::static_type);
target_types.insert (cxx::hxx::static_type);
target_types.insert (cxx::ixx::static_type);
target_types.insert (cxx::txx::static_type);
// Figure out directories: work, home, and {src,out}_{root,base}.
//
work = path::current ();
if (const char* h = getenv ("HOME"))
home = path (h);
else
{
struct passwd* pw (getpwuid (getuid ()));
if (pw == nullptr)
{
const char* msg (strerror (errno));
fail << "unable to determine home directory: " << msg;
}
home = path (pw->pw_dir);
}
//@@ Must be normalized.
//
out_base = work;
src_base = out_base;
// The project's root directory is the one that contains the build/
// sub-directory which contains the pre.build file.
//
for (path d (src_base); !d.root () && d != home; d = d.directory ())
{
path f (d / path ("build/pre.build"));
if (path_mtime (f) != timestamp_nonexistent)
{
src_root = d;
break;
}
}
if (src_root.empty ())
{
src_root = src_base;
out_root = out_base;
}
else
out_root = out_base.directory (src_base.leaf (src_root));
if (verb >= 4)
{
trace << "work dir: " << work.string ();
trace << "home dir: " << home.string ();
trace << "out_base: " << out_base.string ();
trace << "src_base: " << src_base.string ();
trace << "out_root: " << out_root.string ();
trace << "src_root: " << src_root.string ();
}
// Create root scope. For Win32 we use the empty path since there
// is no such "real" root path. On POSIX, however, this is a real
// path. See the comment in <build/path-map> for details.
//
#ifdef _WIN32
root_scope = &scopes[path ()];
#else
root_scope = &scopes[path ("/")];
#endif
// Parse buildfile.
//
path bf ("buildfile");
ifstream ifs (bf.string ());
if (!ifs.is_open ())
fail << "unable to open " << bf;
ifs.exceptions (ifstream::failbit | ifstream::badbit);
parser p;
try
{
p.parse (ifs, bf, scopes[out_base]);
}
catch (const std::ios_base::failure&)
{
fail << "failed to read from " << bf;
}
dump_scopes ();
dump ();
// Register rules.
//
cxx::link cxx_link;
rules[typeid (exe)].emplace ("cxx.gnu.link", cxx_link);
cxx::compile cxx_compile;
rules[typeid (obj)].emplace ("cxx.gnu.compile", cxx_compile);
dir_rule dir_r;
rules[typeid (dir)].emplace ("dir", dir_r);
fsdir_rule fsdir_r;
rules[typeid (fsdir)].emplace ("fsdir", fsdir_r);
path_rule path_r;
rules[typeid (path_target)].emplace ("path", path_r);
// Build.
//
if (default_target == nullptr)
fail << "no default target";
target& d (*default_target);
match (d);
dump ();
switch (update (d))
{
case target_state::uptodate:
{
info << "target " << d << " is up to date";
break;
}
case target_state::updated:
break;
case target_state::failed:
case target_state::unknown:
assert (false);
}
}
catch (const failed&)
{
return 1; // Diagnostics has already been issued.
}
catch (const std::exception& e)
{
error << e.what ();
return 1;
}
}
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