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      1 #!/usr/bin/env python
      2 
      3 # Copyright (c) 2015 Google Inc. All rights reserved.
      4 # Use of this source code is governed by a BSD-style license that can be
      5 # found in the LICENSE file.
      6 
      7 """
      8 Test that RelativePath(s, d) doesn't return a path starting with '..' when
      9 s is textually below d, but is also a symlink to a file that is not below d.
     10 
     11 Returning .. in this case would break the Ninja generator in such a case,
     12 because it computes output directories by concatenating paths, and concat'ing
     13 a path starting with .. can unexpectedly erase other parts of the path. It's
     14 difficult to test this directly since the test harness assumes toplevel_dir is
     15 the root of the repository, but this test should at least verify that the
     16 required behavior doesn't change.
     17 """
     18 
     19 import TestGyp
     20 import os
     21 import sys
     22 import tempfile
     23 
     24 if sys.platform != 'win32':
     25   test = TestGyp.TestGyp()
     26 
     27   # Copy hello.gyp and hello.c to temporary named files, which will then be
     28   # symlinked back and processed. Note that we don't ask gyp to touch the
     29   # original files at all; they are only there as source material for the copy.
     30   # That's why hello.gyp references symlink_hello.c instead of hello.c.
     31   with tempfile.NamedTemporaryFile() as gyp_file:
     32     with tempfile.NamedTemporaryFile() as c_file:
     33       with open('hello.gyp') as orig_gyp_file:
     34         gyp_file.write(orig_gyp_file.read())
     35         gyp_file.flush()
     36       with open('hello.c') as orig_c_file:
     37         c_file.write(orig_c_file.read())
     38         c_file.flush()
     39       # We need to flush the files because we want to read them before closing
     40       # them, since when they are closed they will be deleted.
     41 
     42       # Don't proceed with the test on a system that doesn't let you read from
     43       # a still-open temporary file.
     44       if os.path.getsize(gyp_file.name) == 0:
     45         raise OSError("Copy to temporary file didn't work.")
     46 
     47       symlink_gyp = test.built_file_path('symlink_hello.gyp')
     48       symlink_c = test.built_file_path('symlink_hello.c')
     49       outdir = os.path.dirname(symlink_gyp)
     50 
     51       # Make sure the outdir exists.
     52       try:
     53         os.makedirs(outdir)
     54       except OSError:
     55         if not os.path.isdir(outdir):
     56           raise
     57       os.symlink(gyp_file.name, symlink_gyp)
     58       os.symlink(c_file.name, symlink_c)
     59 
     60       # Run gyp on the symlinked files.
     61       test.run_gyp(symlink_gyp, chdir=outdir)
     62       test.build(symlink_gyp, chdir=outdir)
     63       test.run_built_executable('symlink_hello', stdout="Hello, world!\n",
     64                                 chdir=outdir)
     65 
     66       test.pass_test()
     67