#!/usr/bin/python

# Copyright 2007 Rene Rivera.
# Copyright 2011 Steven Watanabe
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)

#   Added to guard against a bug causing targets to be used before they
# themselves have finished building. This used to happen for targets built by a
# multi-file action that got triggered by another target.
#
# Example:
#   When target A and target B were declared as created by a single action and
# target A triggered running that action then, while the action was still
# running, target B was already reporting as being built causing other targets
# depending on target A to be built prematurely.

import BoostBuild

t = BoostBuild.Tester(pass_toolset=0, pass_d0=False)

t.write("sleep.bat", """\
::@timeout /T %1 /NOBREAK >nul
@ping 127.0.0.1 -n 2 -w 1000 >nul
@ping 127.0.0.1 -n %1 -w 1000 >nul
@exit /B 0
""")

t.write("file.jam", """\
if $(NT)
{
    SLEEP = @call sleep.bat ;
}
else
{
    SLEEP = sleep ;
}

actions .gen.
{
    echo 001
    $(SLEEP) 4
    echo 002
}
rule .use.1 { DEPENDS $(<) : $(>) ; }
actions .use.1
{
    echo 003
}

rule .use.2 { DEPENDS $(<) : $(>) ; }
actions .use.2
{
    $(SLEEP) 1
    echo 004
}

.gen. g1.generated g2.generated ;
.use.1 u1.user : g1.generated ;
.use.2 u2.user : g2.generated ;

DEPENDS all : u1.user u2.user ;
""")

t.run_build_system(["-ffile.jam", "-j2"], stdout="""\
...found 5 targets...
...updating 4 targets...
.gen. g1.generated
001
002
.use.1 u1.user
003
.use.2 u2.user
004
...updated 4 targets...
""")

t.cleanup()