Right, that's indeed what is (very sadly) happening. It turned out that the
stderr output is the part that I really need in this case.
The only working solution I found was to do
run(pipeline(ignorestatus(cmd), stdout=DevNull, stderr="errs.txt"))
t = readall("errs.txt");
but it's annoying having to write a disk file and read its contents.
Had some hope on this one, but no way too
julia> readall(run(pipeline(ignorestatus(cm), STDOUT, STDOUT)))
Image Difference (RootMeanSquaredError):
Normalized Absolute
============ ==========
Red: 0.3709618690 24311.0
Green: 0.3611391197 23667.3
Blue: 0.2638682470 17292.6
Total: 0.3354900017 21986.3
C:/programs/GraphicsMagick/gm.exe compare: image difference exceeds limit
(0.33549 > 0.001).
ERROR: MethodError: `readall` has no method matching readall(::Void)
and this one completely hangs the REPL giviing me no choice but killing the
shell window
rd,wr=redirect_stderr();
run(pipeline(ignorestatus(cmd), stdout=DevNull, stderr=rd))
now if try to read from 'rd'
readall(rd) # ---> IceAge
sábado, 12 de Setembro de 2015 às 15:35:39 UTC+1, Miguel Bazdresch escreveu:
>
> What could be happening is that `gm.exe` is printing that message to
> STDERR, which is not captured by `readall()`. In theory, the new pipeline
> infrastructure should let you capture STDERR, but I haven't had the time to
> figure out exactly how. Maybe somebody who knows will chime in.
>
> -- mb
>
> On Fri, Sep 11, 2015 at 9:17 PM, J Luis <[email protected] <javascript:>>
> wrote:
>
>> Found a ignorestatus function. Better, but not yet good enough. It still
>> prints a message even if using a suppression ';'
>>
>> julia> readall(ignorestatus(cm));
>> C:/programs/GraphicsMagick/gm.exe compare: image difference exceeds limit
>> (0.336711 > 0.001).
>>
>>
>> sábado, 12 de Setembro de 2015 às 02:00:25 UTC+1, J Luis escreveu:
>>>
>>> Thanks. It turned out my main error was that I was build the Cmd object
>>> by first creating the command as a string and after wrapping it in back
>>> ticks.
>>>
>>> But I continue in troubles. Right, I can run the command, a
>>> GraphicsMagic image comparison command, but when that comparison say the
>>> two images are different gm.exe returns an error code != 0 and Julia
>>> interprets it a command error. But it isn't, it only means the two images
>>> are different. As a consequence the julia function where this happens
>>> aborts (an example in REPL bellow).
>>>
>>> I tried with a try catch but not even that prevented the function
>>> abortion. How can I get out of this one?
>>>
>>> julia> readall(cm)
>>> C:/programs/GraphicsMagick/gm.exe compare: image difference exceeds
>>> limit (0.33549 > 0.001).
>>> ERROR: failed process: Process(`C:/programs/GraphicsMagick/gm.exe
>>> compare -density 200 -maximum-error 0.001 -highlight-color magenta
>>> -highlight-style assign -metric rmse -file V:/example_02.png
>>> C:/progs_cygw/GMTdev/gmt5/branches/5.2.0/doc/examples/ex02/example_02.ps
>>> V:/example_02.ps`, ProcessExited(1)) [1]
>>> in pipeline_error at process.jl:548
>>>
>>> sábado, 12 de Setembro de 2015 às 01:17:57 UTC+1, Simon Kornblith
>>> escreveu:
>>>>
>>>> readall(`cat test`) or similar
>>>>
>>>> On Friday, September 11, 2015 at 7:56:43 PM UTC-4, J Luis wrote:
>>>>>
>>>>> Ok, I've spend about an hour around "run" "open", "run(pipeline(..."
>>>>> but no way.
>>>>> In Matlab I would do
>>>>>
>>>>> [status, cmdout] = system(cmd);
>>>>>
>>>>> but in Julia the most a can reach is to run the command
>>>>>
>>>>> com = "C:/programs/GraphicsMagick/gm.exe compare -density 200 ...
>>>>>
>>>>> run(`com')
>>>>>
>>>>> but I need the result of that execution.
>>>>> How to?
>>>>>
>>>>> Thanks
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>
