[CMake] Issues with execute_process and svn

[aaron.meadows at thomsonreuters.com]

Ah, so does that mean that it is escaping the space, similar to --username\ MyUserName ?

Aaron Meadows


-----Original Message-----
From: David Cole [mailto:david.cole at kitware.com] 
Sent: Wednesday, July 13, 2011 4:09 PM
To: Meadows, Aaron C.
Cc: cmake at cmake.org
Subject: Re: [CMake] Issues with execute_process and svn

It boils down to this:

set(args --username MyUserName)
# sets args to a list with two elements

set(args "--username MyUserName")
# sets args to a list with one element: a string containing a space

execute_process(COMMAND blah ${args})
# calls the command "blah" expanding the n-element CMake list variable
"args" such that each list element is a separate arg to
execute_process, and hence a separate arg to the blah command


HTH,
David


On Wed, Jul 13, 2011 at 4:20 PM,  <aaron.meadows at thomsonreuters.com> wrote:
> That works!  Thanks!
>
> Any idea why the other way was causing issues?
>
> Aaron Meadows
>
>
> -----Original Message-----
> From: David Cole [mailto:david.cole at kitware.com]
> Sent: Wednesday, July 13, 2011 1:06 PM
> To: Meadows, Aaron C.
> Cc: cmake at cmake.org
> Subject: Re: [CMake] Issues with execute_process and svn
>
> Take the double quotes off the set commands for your args variables.
> And put spaces in between the dereferences of those vars in the
> execute_process command.
>
> Like this:
>
> # No double quotes here:
> if(NOT $ENV{CMAKE_SVN_USERNAME} STREQUAL "")
>  set(_SvnCredPart --no-auth-cache)
>  set(_SvnUserPart --username $ENV{CMAKE_SVN_USERNAME})
> endif()
> if(NOT $ENV{CMAKE_SVN_PASSWORD} STREQUAL "")
>  set(_SvnCredPart --no-auth-cache)
>  set(_SvnPassPart --password $ENV{CMAKE_SVN_PASSWORD})
> endif()
>
> # Spaces in between dereferenced vars here:
> execute_process(COMMAND "${svnexe}" --non-interactive
>  ${_SvnCredPart} ${_SvnUserPart} ${_SvnPassPart}
>  info .
>  OUTPUT_VARIABLE _out
>  ERROR_VARIABLE _err
>  RESULT_VARIABLE _res)
>
> message(STATUS "out: ${_out}")
> message(STATUS "err: ${_err}")
> message(STATUS "res: ${_res}")
>
>
> HTH,
> David
>
>
> On Wed, Jul 13, 2011 at 1:57 PM,  <aaron.meadows at thomsonreuters.com> wrote:
>> Hi all,
>>
>>
>>
>> I've been having a devil of a time with executing SVN with execute_process.
>> Basically, I need to read environment variables to specify the username and
>> password for builds on our build server (where we do not cache credentials).
>>
>>
>>
>> I've made several attempts at this, and have been foiled continually by one
>> problem, exemplified in the attached CMakeLists.txt.  If I build arguments
>> in variables and then specify them in the execute_process, I get an error
>> like this:
>>
>>
>>
>> -- err: svn.exe: invalid option: --no-auth-cache --username foo --password
>> bar
>>
>> Type 'svn help' for usage.
>>
>>
>>
>> However, if I write the identical command to a file and execute that, I get
>> no issue.  I've narrowed it down to the <space> between --username and foo,
>> but can't seem to figure out what the deal is.  I've tried replacing them
>> with a value from string(ASCI 32 _sep), but that didn't change the
>> behavior.  I've tried this on Windows 7 and Windows Server 2008, and both
>> behave the same way.
>>
>>
>>
>> You can try these two methods out on the CMakeLists.txt.  By default, it
>> will use the straight execute_process.  If you call cmake with -D TestFile=1
>> it will write the commands to a file and execute that.  (in which case
>> you'll get svn: '.' is not a working copy and not the invalid option issue)
>>
>>
>>
>> Thanks for any help you can provide!
>>
>>
>>
>> Aaron Meadows
>> Software Engineer
>>
>> Thomson Reuters
>>
>> Phone: 314.468.3530
>> Mobile: 636.541.6139
>> aaron.meadows at thomsonreuters.com
>> thomsonreuters.com
>>
>>
>>
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