void split_paths(
const filesystem::path& p1,
const filesystem::path& p2,
filesystem::path& common,
filesystem::path& r1,
filesystem::path& r2)
{
assert(common.empty());
assert(r1.empty());
assert(r2.empty());
filesystem::path::const_iterator i1 = p1.begin();
filesystem::path::const_iterator i2 = p2.begin();
while (i1 != p1.end() && i2 != p2.end())
{
if (*i1 != *i2)
break;
if ((p1.has_filename() && succ(i1) == p1.end()) ||
(p2.has_filename() && succ(i2) == p2.end()))
break;
common /= *i1;
++i1, ++i2;
}
while (i1 != p1.end())
r1 /= *i1++;
while (i2 != p2.end())
r2 /= *i2++;
}
fs::path mpw_path() {
static fs::path path;
if (path.empty()) {
std::error_code ec;
const char *cp = getenv("PATH");
if (!cp) cp = _PATH_DEFPATH;
std::string s(cp);
string_splitter ss(s, ':');
for (; ss; ++ss) {
if (ss->empty()) continue;
fs::path p(*ss);
p /= "mpw";
if (fs::is_regular_file(p, ec)) {
path = std::move(p);
break;
}
}
//also check /usr/local/bin
if (path.empty()) {
fs::path p = "/usr/local/bin/mpw";
if (fs::is_regular_file(p, ec)) {
path = std::move(p);
}
}
if (path.empty()) {
fs::path p = root() / "bin/mpw";
if (fs::is_regular_file(p, ec)) {
path = std::move(p);
}
}
if (path.empty()) {
fprintf(stderr, "Unable to find mpw executable\n");
fprintf(stderr, "PATH = %s\n", s.c_str());
path = "mpw";
}
}
return path;
}
promise< std::pair< std::int64_t, int > >
process::create( const filesystem::path &exe, const std::vector< std::string > &args, const env_t &env, const filesystem::path &working_directory, pid_t &pid, input_f stdin_handler, output_f stdout_handler, output_f stderr_handler )
{
auto context = std::unique_ptr< process_s, std::function< void ( process_s* )> >( new process_s(), []( auto handle )
{
uv_close( reinterpret_cast< uv_handle_t* >( handle ), []( auto handle )
{
auto context = reinterpret_cast< process_s* >( handle );
delete context;
} );
} );
#if defined( WIN32 )
auto env_vec = std::vector< std::string >();
#endif
auto c_args = std::vector< const char* >();
auto c_env = std::vector< const char* >();
auto ret = promise< std::pair< std::int64_t, int > >();
context->stdin_handler = stdin_handler;
context->stdout_handler = stdout_handler;
context->stderr_handler = stderr_handler;
context->ret = ret;
c_args.push_back( exe.c_str() );
for ( auto &arg : args )
{
c_args.push_back( arg.c_str() );
}
c_args.push_back( nullptr );
context->options.file = exe.c_str();
context->options.args = const_cast< char** >( c_args.data() );
#if defined( WIN32 )
context->options.flags = UV_PROCESS_DETACHED;
#endif
if ( !env.empty() )
{
#if defined( WIN32 )
# undef GetEnvironmentStrings
auto strings = GetEnvironmentStrings();
auto prev = 0;
for ( auto i = 0; ; i++ )
{
if ( strings[ i ] == '\0' )
{
env_vec.emplace_back( strings + prev, strings + i );
prev = i;
if ( strings[ i + 1 ] == '\0' )
{
break;
}
}
}
FreeEnvironmentStringsA( strings );
for ( auto &string : env_vec )
{
c_env.push_back( string.c_str() );
}
#else
for ( int i = 0; environ[ i ] != nullptr; i++ )
{
c_env.push_back( environ[ i ] );
}
#endif
for ( auto it = env.begin(); it != env.end(); it++ )
{
c_env.push_back( it->c_str() );
}
c_env.push_back( nullptr );
context->options.env = const_cast< char** >( c_env.data() );
}
if ( !working_directory.empty() )
{
context->options.cwd = working_directory.c_str();
}
context->options.exit_cb = exit_cb;
auto err = uv_spawn( uv_default_loop(), context.get(), &context->options );
ncheck_error_action( err == 0, ret.reject( std::error_code( err, libuv::error_category() ) ), exit );
if ( stdin_handler )
{
auto str = stdin_handler();
auto buf = uv_buf_init( const_cast< char* >( str.data() ), str.size() );
auto req = new uv_write_t;
auto err = std::error_code( uv_write( req, reinterpret_cast< uv_stream_t* >( context->in ), &buf, 1, on_write ), libuv::error_category() );
}
err = uv_read_start( reinterpret_cast< uv_stream_t* >( context->out ), on_alloc_stdout, on_read_stdout );
ncheck_error_action( err == 0, ret.reject( std::error_code( err, libuv::error_category() ) ), exit );
err = uv_read_start( reinterpret_cast< uv_stream_t* >( context->err ), on_alloc_stderr, on_read_stderr );
ncheck_error_action( err == 0, ret.reject( std::error_code( err, libuv::error_category() ) ), exit );
pid = context->pid;
context.release();
exit:
return ret;
}