[cmake-developers] execute_process inconsitancy

[David Cole]

OK... Is hg.exe in the PATH? Do you get different results if you use
the full path to hg.exe rather than just "hg"?


On Mon, Sep 3, 2012 at 5:48 PM, J Decker <d3ck0r at gmail.com> wrote:
> dir "c:\Program Files\tortoisehg
>  Volume in drive C has no label.
>  Volume Serial Number is F05B-C5AF
>
>  Directory of c:\Program Files\tortoisehg
> ....
> 08/20/2012  10:47 PM            33,544 hg.exe
> ....
>
> I don't know what hy.py would be .....
>
> On Mon, Sep 3, 2012 at 2:37 PM, David Cole <david.cole at kitware.com> wrote:
>> On Mon, Sep 3, 2012 at 5:15 PM, J Decker <d3ck0r at gmail.com> wrote:
>>> On Mon, Sep 3, 2012 at 1:04 PM, Brad King <brad.king at kitware.com> wrote:
>>>> On 09/03/2012 03:04 PM, J Decker wrote:
>>>>> I use this command to get the current repository version number.
>>>>>
>>>>> Under windows I have to use 'cmd /c ...'
>>>>> under linux or I obviously can't use that.
>>>>>
>>>>> Is there a test I can do in a cmakelists to test the shell processor?
>>>>>
>>>>> Is there something I can do to make this the same command?
>>>>>
>>>>> Under windows, without cmd /c .... the output variable is blank.
>>>>>
>>>>>
>>>>> if( WIN32 )
>>>>>
>>>>> execute_process( COMMAND cmd /c hg id -i WORKING_DIRECTORY
>>>>> ${CMAKE_SOURCE_DIR} OUTPUT_VARIABLE TMP_CURRENT_REPO_REVISION )
>>>>>
>>>>> else( WIN32 )
>>>>>
>>>>> execute_process( COMMAND hg id -i WORKING_DIRECTORY
>>>>> ${CMAKE_SOURCE_DIR} OUTPUT_VARIABLE TMP_CURRENT_REPO_REVISION )
>>>>>
>>>
>>> execute_process( COMMAND hg id -i WORKING_DIRECTORY
>>> ${CMAKE_SOURCE_DIR} OUTPUT_VARIABLE TMP_CURRENT_REPO_REVISION
>>> ERROR_VARIABLE TMP_CURRENT_REPO_REVISION2 )
>>> message( "1)" ${TMP_CURRENT_REPO_REVISION} )
>>> message( "1)" ${TMP_CURRENT_REPO_REVISION2} )
>>>
>>> both revision and revision2 are blank, (without cmd /c before)
>>>
>>>>> endif( WIN32 )
>>>>
>>>> The command operates the same way on both platforms.
>>>> My guess is that "hg" is printing to stderr on Windows.
>>>> Try this:
>>>>
>>>>  execute_process(
>>>>    COMMAND hg id -i
>>>>    WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
>>>>    OUTPUT_VARIABLE TMP_CURRENT_REPO_REVISION
>>>>    ERROR_VARIABLE TMP_CURRENT_REPO_REVISION
>>>>    )
>>>>
>>>> -Brad
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>>
>>
>> On Windows, "hg" is not an executable file, so execute_process is
>> probably not even running it. If you instead say:
>>
>>   COMMAND C:/python26/python.exe C:/path/to/hg.py (... args ...)
>>
>> does that work?