boost/tools/build/test/rebuilds.py

#!/usr/bin/python

# Copyright 2005 Dave Abrahams
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE_1_0.txt or copy at
# http://www.boost.org/LICENSE_1_0.txt)

import BoostBuild


def wait_for_bar(t):
    """
      Wait to make the test system correctly recognize the 'bar' file as
    touched after the next build run. Without the wait, the next build run may
    rebuild the 'bar' file with the new and the old file modification timestamp
    too close to each other - which could, depending on the currently supported
    file modification timestamp resolution, be detected as 'no change' by the
    testing system.

    """
    t.wait_for_time_change("bar", touch=False)


t = BoostBuild.Tester(["-ffile.jam", "-d+3", "-d+12", "-d+13"], pass_d0=False,
    pass_toolset=0)

t.write("file.jam", """\
rule make
{
    DEPENDS $(<) : $(>) ;
    DEPENDS all : $(<) ;
}
actions make
{
    echo "******" making $(<) from $(>) "******"
    echo made from $(>) > $(<)
}

make aux1 : bar ;
make foo : bar ;
REBUILDS foo : bar ;
make bar : baz ;
make aux2 : bar ;
""")

t.write("baz", "nothing")

t.run_build_system(["bar"])
t.expect_addition("bar")
t.expect_nothing_more()

wait_for_bar(t)
t.run_build_system(["foo"])
t.expect_touch("bar")
t.expect_addition("foo")
t.expect_nothing_more()

t.run_build_system()
t.expect_addition(["aux1", "aux2"])
t.expect_nothing_more()

t.touch("bar")
wait_for_bar(t)
t.run_build_system()
t.expect_touch(["foo", "bar", "aux1", "aux2"])
t.expect_nothing_more()

t.cleanup()