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// file : build/cli/module.cxx -*- C++ -*-
// copyright : Copyright (c) 2014-2015 Code Synthesis Ltd
// license : MIT; see accompanying LICENSE file
#include <build/cli/module>
#include <butl/process>
#include <butl/fdstream>
#include <build/scope>
#include <build/target>
#include <build/variable>
#include <build/diagnostics>
#include <build/cxx/target>
#include <build/config/utility>
#include <build/cli/target>
#include <build/cli/rule>
using namespace std;
using namespace butl;
namespace build
{
namespace cli
{
static compile compile_;
extern "C" bool
cli_init (scope& root,
scope& base,
const location& loc,
std::unique_ptr<module>&,
bool first,
bool)
{
tracer trace ("cli::init");
level5 ([&]{trace << "for " << base.out_path ();});
// Make sure the cxx module has been loaded since we need its
// targets types (?xx{}). Note that we don't try to load it
// ourselves because of the non-trivial variable merging
// semantics. So it is better to let the user load cxx
// explicitly.
//
{
auto l (base["cxx.loaded"]);
if (!l || !as<bool> (*l))
fail (loc) << "cxx module must be loaded before cli";
}
// Register target types.
//
{
auto& tts (base.target_types);
tts.insert<cli> ();
tts.insert<cli_cxx> ();
}
// Register our rules.
//
{
auto& rs (base.rules);
rs.insert<cli_cxx> (perform_id, update_id, "cli", compile_);
rs.insert<cli_cxx> (perform_id, clean_id, "cli", compile_);
rs.insert<cxx::hxx> (perform_id, update_id, "cli", compile_);
rs.insert<cxx::hxx> (perform_id, clean_id, "cli", compile_);
rs.insert<cxx::cxx> (perform_id, update_id, "cli", compile_);
rs.insert<cxx::cxx> (perform_id, clean_id, "cli", compile_);
rs.insert<cxx::ixx> (perform_id, update_id, "cli", compile_);
rs.insert<cxx::ixx> (perform_id, clean_id, "cli", compile_);
// Other rules (e.g., cxx::compile) may need to have the group
// members resolved. Looks like a general pattern: groups should
// resolve on configure(update).
//
rs.insert<cli_cxx> (configure_id, update_id, "cli", compile_);
}
// Enter module variables.
//
if (first)
{
var_pool.find ("config.cli", string_type); //@@ VAR type
var_pool.find ("config.cli.options", strings_type);
var_pool.find ("cli.options", strings_type);
}
// Configure.
//
// config.cli
//
if (first)
{
auto p (config::required (root, "config.cli", "cli"));
// If we actually set a new value, test it by trying to execute.
//
if (p.second)
{
const string& cli (as<string> (p.first));
const char* args[] = {cli.c_str (), "--version", nullptr};
if (verb >= 2)
print_process (args);
else if (verb)
text << "test " << cli;
string ver;
try
{
process pr (args, 0, -1); // Open pipe to stdout.
ifdstream is (pr.in_ofd);
// The version should be the last word on the first line.
//
string l;
getline (is, l);
auto p (l.rfind (' '));
if (p != string::npos)
ver = string (l, p + 1);
is.close (); // Don't block the other end.
if (!pr.wait ())
throw failed ();
if (ver.empty ())
fail << "unexpected output from " << cli;
}
catch (const process_error& e)
{
error << "unable to execute " << cli << ": " << e.what ();
if (e.child ())
exit (1);
throw failed ();
}
if (verb >= 2)
text << cli << " " << ver;
}
}
// config.cli.options
//
// This one is optional. We also merge it into the corresponding
// cli.* variables. See the cxx module for more information on
// this merging semantics and some of its tricky aspects.
//
if (const value& v = config::optional (root, "config.cli.options"))
base.assign ("cli.options") += as<strings> (v);
return true;
}
}
}
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