#ruby on 2022-08-31 — irc logs at libera.irclog.whitequark.org

2022-04-12 14:08 jhass[m] changed the topic of #ruby to: Rules: https://ruby-community.com | Ruby 3.1.2, 3.0.4, 2.7.6: https://www.ruby-lang.org | Paste 4+ lines to: https://gist.github.com | Books: https://goo.gl/wpGhoQ

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04:59 <madprops> so to get the wait_thr i need popen3 instead of capture3 (it seems). but seems the only way to feed it stdin is wtih the callback, stdin.write(s) but now the information is not shown instantly upon starting the command

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10:40 <madprops> what's the deal with top 2 ruby extensions on vscode

10:40 <madprops> they point to the same repo

10:40 <madprops> but are made by 2 different people

10:41 <madprops> one by Peng Lv and the other by Stafford Brunk

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10:51 <adam12> madprops: Hard to say about your popen3 without seeing the source code.

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10:52 <madprops> adam12, https://gist.github.com/madprops/e7287c454b1b9900082b4eece9679cd3

10:52 <madprops> you'd need rofi installed to check it

10:53 <adam12> madprops: What do you want to do with the output of rofi?

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10:54 <madprops> in some cases I make it return the index, to know what item the user picked. also would need the return code. Like so (in python) https://gist.github.com/madprops/44e27f25a2b22562c0a05faf76fccc33

10:55 <madprops> adam12,

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10:55 <madprops> basically the only issue is that there's a slight delay when showing rofi in the ruby version

10:55 <madprops> as if it first loads rofi, then takes the stdin

10:55 <adam12> madprops: Do you close it after they've picked their data?

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10:56 <madprops> yes

10:57 <madprops> the user hits enter, rofi stops and responds

10:57 <madprops> or responds and stops*

11:03 <madprops> puts stdout.read

11:03 <madprops> puts wait_thr.value.exitstatus

11:03 <madprops> i can use that to get the info

11:03 <madprops> just don't know how to fill rofi instantly like i do with my other python scripts

11:04 <madprops> there's like a 150ms delay

11:04 <adam12> I can't get rofi installed on this machine to play with it, but the strange (imho) part is having two mechanisms of stdin.

11:04 <adam12> I wonder how the Python call is handling that.

11:05 <madprops> in python my full proc line looks like:

11:05 <madprops> proc = Popen(f'{prompt} -format i {rofi_style} -selected-row {selected}', stdout=PIPE, stdin=PIPE, shell=True, text=True)

11:06 <madprops> oh it's in the gist

11:06 <adam12> Do you know if Python is making an IO pipe and then creating threads to buffer between them?

11:06 <adam12> Maybe that's unnecessary work. And it's early here, my brain might not be functioning right.

11:07 <madprops> https://docs.python.org/3/library/subprocess.html#subprocess.Popen.communicate

11:08 <madprops> im gonna ask in python

11:09 <adam12> https://github.com/python/cpython/blob/29f1b0bb1ff73dcc28f0ca7e11794141b6de58c9/Lib/subprocess.py#L1554

11:10 <adam12> Seems they are using threads.

11:11 <madprops> hmm

11:11 <adam12> I guess you could create a pipe for stdin. Pass the reader side of the pipe to popen3. Write your pre-load data into the writable side of the pipe, then spawn a thread that reads from $stdin and writes to the writable side of the buffer.

11:11 <adam12> s/buffer/pipe

11:12 <adam12> then just wait for thread exit?

11:31 <madprops> adam12, turns out it was a rofi thing. If I add the option -selected-row 0 to it, it loads instantly. Not sure why

11:31 <adam12> madprops: Weird. And everything else works as expeted?

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11:35 <madprops> sorry my computer crashed

11:35 <madprops> https://gist.github.com/madprops/8dd2d267e8f0b87053eb677d0f1b63ab

11:35 <madprops> after attempting to run that

11:36 <madprops> i know exitcode should be exitstatus there

11:36 <madprops> but not sure that would cause the crash

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11:39 <adam12> madprops: I'm not sure why it would crash.

11:39 <adam12> It looks OK

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11:47 <madprops> tried again and it hanged as well

11:47 <madprops> but changing to another tty worked this time

11:47 <madprops> and i killed rofi

11:48 <madprops> seems this line is doing it: puts wait_thr.value.exitstatus

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11:55 <madprops> if i remove the -selected-row option, it works ok

11:55 <madprops> probably a rofi bug

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15:09 <madprops> adam12, got some closure on the rofi thing. https://github.com/davatorium/rofi/discussions/1692

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15:12 <adam12> madprops: ah. interesting...

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