[CMake] Problem setting ENVIRONMENT for ctest

[Johannes Wienke]

Hey,

thanks for the quick reply.

Am 03.12.2010 19:12 schrieb David Cole:
> What version of cmake/ctest are you using?
> (i.e. -- send the output of "cmake --version")

On the windows machine (32 bit) where the problem is visible it is
2.8.3. I could also verify the generated CTestTestfile on linux 64 bit
with 2.8.0.

> What does CTestTestfile.cmake contain if you change your CMakeLists
> file to use set_property(TEST ...) instead of set_tests_properties()?

The same content that does not work.

> This should work as expected in CMake. We have a test in the test
> suite that tests the ENVIRONMENT test property at
> CMake/Tests/Environment/CMakeLists.txt -- the test uses
> set_tests_properties.

I took a look at the contents of that test and transferred it to my
project printing out the PATH environment variable. There I found two
things: a) an inconsistent behavior and b) the real problem. ;)

a)
I had the correct path required for running the tests exported on the
shell prior to calling ctest. With the SET_TESTS_PROPERTIES test file
version generated by cmake this is ignored (PATH is completely replaced
by the contents of the test file) whereas the SET_PROPERTIES(TEST...)
version (modified by hand) seems to append to the current path instead
of replacing it and hence passed through the correct export from my
shell to the test executable.

b)
The real problem is that the system path of my machine contains an entry
that ends with a slash (completely legal):

...tem32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\...
(end of the powershell entry)

Using the regular expression above to escape the semicolons results in:

...tem32\Wbem\;C:\Windows\System32\WindowsPowerShell\v1.0\\;C:\...

You see the double-slash.
Using this string again in the SET_TESTS_PROPERTIES macro again results
in a path truncated after this entry because everything after the
powershell entry is misinterpreted by the macro as a new environment
variable or I don't know.

So the real question is how to handle this case correctly? The need to
escape the semicolons seems to be a burden for users that isn't event
documented and in this case results in a error which requires strange
corner cases routines.

Regards,
Johannes

> On Fri, Dec 3, 2010 at 12:37 PM, Johannes Wienke
> <jwienke at techfak.uni-bielefeld.de> wrote:
>> Dear all,
>>
>> I am try to set the PATH environment variable on windows for running the
>> unit tests through ctest. The ctest file is generated by the cmake scripts.
>> The PATH is required to for finding additional dlls required by the tests.
>>
>> I tried to set the PATH using this cmake code:
>>
>> SET(PATH_STRING "$ENV{PATH};${Boost_LIBRARY_DIRS}")
>> STRING(REPLACE ";" "\\;" PATH_STRING "${PATH_STRING}")
>> SET_TESTS_PROPERTIES(rsbtest PROPERTIES ENVIRONMENT "PATH=${PATH_STRING}")
>>
>> This is done according to this list posting some time ago:
>> http://www.cmake.org/pipermail/cmake/2009-May/029464.html
>>
>> However, it does not work for me. PATH is not changed when calling ctest and
>> the dlls are not found. I investigated a bit and found out that the
>> resulting CTestTestfile.cmake file contains these lines for every specified
>> test:
>>
>> ADD_TEST(rsbtest "<correct binary>")
>> SET_TESTS_PROPERTIES(rsbtest PROPERTIES  ENVIRONMENT "PATH=<correct path
>> with correct escapes>")
>>
>> However, "man ctest" does not even document that SET_TESTS_PROPERTIES is a
>> valid command for ctest. Instead SET_PROPERTY(TEST...) is explained. So I
>> changed the generated CTestTestfile.cmake according to this information to:
>>
>> ADD_TEST(rsbtest "<correct binary>")
>> SET_PROPERTY(TEST rsbtest PROPERTY ENVIRONMENT "PATH=<correct path with
>> correct escapes>")
>>
>> Afterwards all unit tests run as expected.
>>
>> What am I doing wrong here? Or is this a bug in cmake?
>>
>> Thanks for any help!
>> Johannes
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