test/Decider/content-timestamp-symlink.py

   1 #!/usr/bin/env python
   2 #
   3 # Copyright The SCons Foundation
   4 #
   5 # Permission is hereby granted, free of charge, to any person obtaining
   6 # a copy of this software and associated documentation files (the
   7 # "Software"), to deal in the Software without restriction, including
   8 # without limitation the rights to use, copy, modify, merge, publish,
   9 # distribute, sublicense, and/or sell copies of the Software, and to
  10 # permit persons to whom the Software is furnished to do so, subject to
  11 # the following conditions:
  12 #
  13 # The above copyright notice and this permission notice shall be included
  14 # in all copies or substantial portions of the Software.
  15 #
  16 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
  17 # KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
  18 # WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  19 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  20 # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  21 # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  22 # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23
  24 """
  25 Test the content-timestamp decider (formerly known as md5-timestamp)
  26 correctly detects modification of a source file which is a symlink.
  27 """
  28
  29 import TestSCons
  30
  31 _python_ = TestSCons._python_
  32
  33 test = TestSCons.TestSCons()
  34
  35 if not test.platform_has_symlink():
  36     test.skip_test('Symbolic links not reliably available on this platform, skipping test.\n')
  37
  38 # a dummy "compiler" for the builder
  39 test.write('build.py', r"""
  40 import sys
  41
  42 with open(sys.argv[1], 'wb') as ofp:
  43     for infile in sys.argv[2:]:
  44         with open (infile, 'rb') as ifp:
  45             ofp.write(ifp.read())
  46 sys.exit(0)
  47 """)
  48
  49 test.write('SConstruct', """
  50 DefaultEnvironment(tools=[])
  51 Build = Builder(action=r'%(_python_)s build.py $TARGET $SOURCES')
  52 env = Environment(tools=[], BUILDERS={'Build': Build})
  53 env.Decider('content-timestamp')
  54 env.Build(target='match1.out', source='match1.in')
  55 env.Build(target='match2.out', source='match2.in')
  56 """ % locals())
  57
  58 test.write('match1.in', 'match1.in\n')
  59 test.symlink('match1.in', 'match2.in')
  60
  61 test.run(arguments='.')
  62 test.must_match('match1.out', 'match1.in\n')
  63 test.must_match('match2.out', 'match1.in\n')
  64
  65 # first make sure some time has elapsed, so a low-granularity timestamp
  66 # doesn't fail to trigger
  67 test.sleep()
  68 # Now update the source file contents, both targets should rebuild
  69 test.write('match1.in', 'match2.in\n')
  70
  71 test.run(arguments='.')
  72 test.must_match('match1.out', 'match2.in\n', message="match1.out not rebuilt\n")
  73 test.must_match('match2.out', 'match2.in\n', message="match2.out not rebuilt\n")
  74
  75 test.pass_test()
  76
  77 # Local Variables:
  78 # tab-width:4
  79 # indent-tabs-mode:nil
  80 # End:
  81 # vim: set expandtab tabstop=4 shiftwidth=4: