#!/usr/bin/env python
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__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"

"""
Verify accessing cache works even if it's read-only.
"""

import glob
import os
import TestSCons
import time
from stat import *

test = TestSCons.TestSCons()

test.write(['SConstruct'], """\
DefaultEnvironment(tools=[])
CacheDir('cache')
Command('file.out', 'file.in', Copy('$TARGET', '$SOURCE'))
""")

test.write('file.in', "file.in\n")

test.run(arguments = '--debug=explain --cache-debug=- .')

cachefile = glob.glob("cache/??/*")[0]

time0 = os.stat(cachefile).st_mtime

time.sleep(.1)

test.unlink('file.out')

test.run(arguments = '--debug=explain --cache-debug=- .')

time1  = os.stat(cachefile).st_mtime

# make sure that mtime has been updated on cache use
if time1 <= time0:
    test.fail_test()

test.unlink('file.out')

for root, dirs, files in os.walk("cache", topdown=False):
    for file in files:
        os.chmod(os.path.join(root,file), 0o444)
    for dir in dirs:
        os.chmod(os.path.join(root,dir), 0o555)

test.run(arguments = '--debug=explain --cache-debug=- .')

test.pass_test()

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