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// file : libbuild2/build/script/runner.cxx -*- C++ -*-
// license : MIT; see accompanying LICENSE file
#include <libbuild2/build/script/runner.hxx>
#include <libbutl/filesystem.mxx>
#include <libbuild2/target.hxx>
#include <libbuild2/script/run.hxx>
using namespace butl;
namespace build2
{
namespace build
{
namespace script
{
void default_runner::
enter (environment& env, const location& ll)
{
// Create the temporary directory for this run regardless of the
// dry-run mode, since some commands still can be executed (see run()
// for details). This also a reason for not using the build2
// filesystem API that considers the dry-run mode.
//
// Note that the directory auto-removal is active.
//
dir_path& td (env.temp_dir.path);
try
{
td = dir_path::temp_path ("build2-build-script");
}
catch (const system_error& e)
{
// While there can be no fault of the script being currently
// executed let's add the location anyway to ease the
// troubleshooting. And let's stick to that principle down the road.
//
fail (ll) << "unable to obtain temporary directory for buildscript "
<< "execution" << e;
}
mkdir_status r;
try
{
r = try_mkdir (td);
}
catch (const system_error& e)
{
fail(ll) << "unable to create temporary directory '" << td << "': "
<< e << endf;
}
// Note that the temporary directory can potentially stay after some
// abnormally terminated script run. Clean it up and reuse if that's
// the case.
//
if (r == mkdir_status::already_exists)
try
{
butl::rmdir_r (td, false /* dir */);
}
catch (const system_error& e)
{
fail (ll) << "unable to cleanup temporary directory '" << td
<< "': " << e;
}
if (verb >= 3)
text << "mkdir " << td;
}
void default_runner::
leave (environment& env, const location& ll)
{
// Drop cleanups of target paths.
//
for (auto i (env.cleanups.begin ()); i != env.cleanups.end (); )
{
const target* m (&env.target);
for (; m != nullptr; m = m->adhoc_member)
{
if (const path_target* pm = m->is_a<path_target> ())
if (i->path == pm->path ())
break;
}
if (m != nullptr)
i = env.cleanups.erase (i);
else
++i;
}
clean (env, ll);
// Note that since the temporary directory may only contain special
// files that are created and registered for cleanup by the script
// running machinery and should all be removed by the above clean()
// function call, its removal failure may not be the script fault but
// potentially a bug or a filesystem problem. Thus, we don't ignore
// the errors and report them.
//
env.temp_dir.cancel ();
const dir_path& td (env.temp_dir.path);
try
{
// Note that the temporary directory must be empty to date.
//
rmdir_status r (try_rmdir (td));
if (r != rmdir_status::success)
{
diag_record dr (fail (ll));
dr << "temporary directory '" << td
<< (r == rmdir_status::not_exist
? "' does not exist"
: "' is not empty");
if (r == rmdir_status::not_empty)
build2::script::print_dir (dr, td, ll);
}
}
catch (const system_error& e)
{
fail (ll) << "unable to remove temporary directory '" << td << "': "
<< e;
}
if (verb >= 3)
text << "rmdir " << td;
}
void default_runner::
run (environment& env,
const command_expr& expr,
size_t li,
const location& ll)
{
if (verb >= 3)
text << ": " << expr;
// Run the expression if we are not in the dry-run mode or if it
// executes the set or exit builtin and just print the expression
// otherwise at verbosity level 2 and up.
//
if (!env.context.dry_run ||
find_if (expr.begin (), expr.end (),
[] (const expr_term& et)
{
const string& p (et.pipe.back ().program.string ());
return p == "set" || p == "exit";
}) != expr.end ())
build2::script::run (env, expr, li, ll);
else if (verb >= 2)
text << expr;
}
bool default_runner::
run_if (environment& env,
const command_expr& expr,
size_t li, const location& ll)
{
if (verb >= 3)
text << ": ?" << expr;
return build2::script::run_if (env, expr, li, ll);
}
}
}
}
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