Add $RANDOM

[ksaj]

Hello! I have an idea!

Under bash, zsh, and probably others, if you type "echo $RANDOM" you get a random number. It is a different random number each time it is echoed.

I thought this should be a thing in Xonsh because this post from It's FOSS on Mastodon treats it as a given that "echo $RANDOM" on the (unnamed) CLI will have this effect, but this is not the case for Xonsh.

https://infosec.exchange/deck/@itsfoss@mastodon.social/111277379265186528

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[AstraLuma]

Xonsh is not a bourne-ish shell. You want @(random.random()).

[anki-code]

Hello @ksaj!
In xonsh there are many ways to achieve this.

1. Using alias:

aliases['rnd'] = lambda: __import__('random').randint(0,100) # one liner implementation
echo $(rnd)
# 23
echo $(rnd)
# 43

2. Using function:

RND = lambda: __import__('random').randint(0,100)
echo @(RND())
# 43
echo @(RND())
# 53

See xonsh-cheetsheet for more ways.

[HLSSLenda]

@ksaj You can use a @events.on_pre_prompt on your .xonshrc to emulate $RANDOM.

@events.on_pre_prompt
def _():
    import random
    return random.randint(0, 32767)

Now you can use $RANDOM like you would do in bash.

16:48:50 47% jorge@localhost ~ @ $RANDOM
20034
16:48:51 47% jorge@localhost ~ @