[CMake] Handling real-time output from execute_process

[Person Withhats]

1) I want output in real time on a Windows system(no tail), and piping
output to a file then reading it is a very poor solution. 'just check the
contents in note pad'....
2) This is a general-purpose solution and not something I'm making just for
myself, hacky fixes are not an option.

On Fri, Dec 21, 2018 at 7:26 PM frodak17 <frodak17 at gmail.com> wrote:

>
>
> On Fri, Dec 21, 2018 at 8:30 PM Person Withhats <personwithhats2 at gmail.com>
> wrote:
>
>> Hey there!
>>
>> I'm running a script that downloads some files and untars them. This
>> takes a while but it outputs progress. Unfortunately I can't get the output
>> to show up in real-time with CMake GUI or CLI.
>>
>> Current workaround to see output live, loses it in log though......
>>     execute_process(COMMAND "cmd" /c "start /wait download_sdks.exe"
>>     WORKING_DIRECTORY "${SCRIPT_DIR}"
>>     OUTPUT_VARIABLE OUT
>>     RESULT_VARIABLE RES)
>>
>> Exit code is always 0 no matter what I do or how I get this set up. I
>> want to see the output as it's running (preferably in same cmake window)
>> and for the GUI stop-button to properly stop the script instead of hanging
>> until script ends by itself.
>>
>> Right now I can get the output at the end but after 1.5 hours of
>> untarring/etc. I'd be worried if it wasn't just frozen......
>>
>> This is for windows 10 ofc and the .exe file is PyInstalled. Works fine
>> double-clicking (launches terminal/etc.) but Cmake....ugh......
>>
>> tl;dr script runs and works fine as usual but I can't see output *while*
>> it's running instead of after.
>>
>
> How about use OUTPUT_FILE instead. Then while CMake is running you can do
> a tail -f on the output file in a different window or just check the
> contents in notepad. I don’t know what happens if you don’t redirect
> standard output from CMake maybe it shows in terminal.
>
>>
>>
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