scopatz/xonsh

xonsh is a Python-powered, cross-platform, Unix-gazing shell language and command prompt

Anthony Scopatz

@scopatz

:tada:!

Austin Bingham

@abingham

When I use xontrib load vox_tabcomplete I trigger an assertion ("/usr/local/Cellar/xonsh/0.9.23/libexec/lib/python3.9/site-packages/xonsh/parsers/base.py", line 2215, in apply_trailers assert False). Any idea what's going on?

2 replies

eggcaker

@eggcaker

hi all, is there a way to capture the command result , i has a cmd build with python mode like : cmd = 'ssh user@sshserver.com cat ~/myfile' , then i want to capture the result the cmd returns , but if i ran ``` result = $(@(cmd)) i got command not found

Anthony Scopatz

@scopatz

@eggcaker - in that example, cmd should be a list of str.

cmd = 'ssh user@sshserver.com cat ~/myfile'.split()
$(@(cmd))

should work

eggcaker

@eggcaker

@scopatz how about pipeline ?

Anthony Scopatz

@scopatz

I think it would have to be something like $(@(cmd1) | @(cmd2))

eggcaker

@eggcaker

mean , I cannot include the "|" inside the cmd

Anthony Scopatz

@scopatz

That's right. The pipe joins commands

eggcaker

@eggcaker

like : cmd = '.... myfile | rg my_search'.split()?

Anthony Scopatz

@scopatz

At least, that is how it is implemented now

You could use execx or similar to execute a block of code, but that wouldn't capture in the way that you want

hmmm actually

You might be able to create an ExecAlias out of the command, and then capture the alias

This is little hacky but it would look something like:

aliases['__my_piped_cmd__'] = '.... myfile | rg my_search'
$(__my_piped_cmd__)

I haven't tried that, but it might work

eggcaker

@eggcaker

yes , i known that way, it's works well, this time i just write some script quickly just want concat the command generate with python loop and run that command capture the result

David Strobach

@laloch

The following forks for me:

$ cmd = "cat ~/.xonshrc | grep '^$.*='"
$ execx(f"cmdout=$({cmd})", glbs=globals())
$ echo @(cmdout)

eggcaker

@eggcaker

Thanks @laloch this way works

eggcaker

@eggcaker

with $(@(cmd1) | @(cmd2)) seems not working

wait .. maybe not ...

eggcaker

@eggcaker

@scopatz $(@(cmd1) | @(cmd2)) works too ,my bad thanks @scopatz @laloch

Anthony Scopatz

@scopatz

cool thanks!

matrixbot

@matrixbot

Phase Hi, I would like to give a try to xonsh... would you have a website, wiki, sort of knowledge base with those kind of tricks? It looks feasible but strange for someone with a bash background :)

David Strobach

@laloch

Yeah, there's https://xon.sh with quite a lot of documentation at https://xon.sh/contents.html#guides.

David Strobach

@laloch

btw, as far as I can tell, the above in-place variable expansion with complex command pipeline is not possible in bash either.

Anthony Scopatz

@scopatz

@laloch - yeah it isn't.... it is super hard to pull off because the parser has to delay evaluating certain tokens until the after the parsing is done

It is kind of a catch-22 which is why I haven't seen a language that is able to actually implement it

matrixbot

@matrixbot

Phase I haven't read in detail but it looks like eval "$cmd1 | $cmd2" . Anyway. Thx!

Anthony Scopatz

@scopatz

BTW folks I am hoping to do a weekly release tonight

anki-code

@anki-code

great!

Anthony Scopatz

@scopatz

v0.9.24 is out!

anki-code

@anki-code

:tada: :muscle: :rocket: :tada:

anki-code

@anki-code

:newspaper: I found xontribs on Github and ask the authors to add xontrib topic and preview images to the xontrib repos. As result we have 34 xontribs in Github Topics - https://github.com/topics/xontrib - and part of them have cute preview images. Take a minute to look and star most interesting!

:bookmark: Also I improved Cookiecutter template to create xontribs and you can find the one minute way to create xontrib, publish it to PyPi and the list of actions to promote xontrib in the template README. Feel free to xontribution!

Anthony Scopatz

@scopatz

Thanks for the updates @anki-code!

anki-code

@anki-code

:new: New concept of the introduction image (it's not 4 images, it's one image with 4 blocks):

(https://github.com/xonsh/xonsh/issues/3706#issuecomment-711097143)

CaféHaine

@cafehaine

v0.1.3 of xontrib-xlsd is now released ! with support for $LS_COLORS, a bugfix for circular symlinks, and a screenshot in the README to fulfill your daily need of pretty pictures!

anki-code

@anki-code

cool xontrib! :tada:

Anthony Scopatz

@scopatz

xlsd is great! Thanks for the really nice release @cafehaine!

anki-code

@anki-code

I've added xonsh to many awesome lists on github and one of the major list is "awesome-python".
:star: Please like the first comment in this PR -> vinta/awesome-python#1623 or add new comment like "Yeah I'm using xonsh!" or just "+1".
Starring the awesome-python repo will be good too.

anki-code

@anki-code

:new: I rewrited all my xontribs from xsh to py that enables compilation the files to pyc and work faster.
And now I've made "The pack of ergonomic xontribs" - xontrib-ergopack - meta package that includes all my xontribs. To install and load all xontribs just run pip install xontrib-ergopack && xontrib load ergopack.

1 reply

AlexeyKlimov

@AlexeyKlimov

Hello all. I'd like to switch from bash to xonsh for scripting and I'm worried that because of a typo my python command could be interpreted in subprocess mode and would do smth dangerous. Is there a way to force explicit calling of subprocess commands (e.g. ![ls -l])? Is this really a problem in real life xonsh scripting, btw?

anki-code

@anki-code

@AlexeyKlimov I'm not so old user of xonsh and writed around 10 thousands of lines and use it as the main shell prompt. And my answer: just start writing. During my experience I never have any problems with subproc vs Python mode.

Yes, you can use ![] calls to be sure that you're in subprocess mode.

anki-code

@anki-code

from bash to xonsh

Moreover I believe that the question around "xonsh VS bash VS zsh VS etc" is wrong because xonsh has abilities to live with sh-shells under one umbrella. The question is how to use "xonsh AND bash AND zsh and ..." during the work and what is the good patterns of work for this.

For example if you have strong muscle memory on writing bash spells you can just do in xonsh prompt:

bash -c! echo 'spell on bash'

Or use xontrib-sh for short command.

AlexeyKlimov

@AlexeyKlimov

@anki-code I'm perfectly fine with writing scripts in python, since I know python and don't like using bash at all. I'm just scared that I could mistype var name in xonsh script and my python line becomes a valid sh line that's able to delete smth

anki-code

@anki-code

I think you can't give me an example )

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