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Show HN: Bash Screensavers

(github.com)
225 points attogram | 7 comments | 28 Oct 25 11:12 UTC | HN request time: 1.076s | source | bottom

A github project to collect a bunch of bash-based screensavers/visualizations.
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alejoar ◴[28 Oct 25 12:09 UTC] No.45731748[source]▶
Doesn't work for me on MacOS:

I get "mapfile: command not found"

replies(5): >>45731825 #>>45731919 #>>45733380 #>>45733582 #>>45736773 #
SeeManDo ◴[28 Oct 25 12:17 UTC] No.45731825[source]▶
Same here
replies(1): >>45731837 #
1. SeeManDo ◴[28 Oct 25 12:18 UTC] No.45731837[source]▶
Bash Screensavers v0.0.27 (Mystic Shine)

./screensaver.sh: line 79: mapfile: command not found 1 .

(Press ^C to exit)

Choose your screensaver: 1 404 Screensaver Not Found:

Oh no! Screensaver had trouble! Error code: 1

replies(2): >>45731944 #>>45732065 #
2. seba_dos1 ◴[28 Oct 25 12:28 UTC] No.45731944[source]▶
Get a Bash that's not ancient. mapfile is there since version 4.0 from 2009.
replies(1): >>45732195 #
3. SeeManDo ◴[28 Oct 25 12:40 UTC] No.45732065[source]▶
Seems to be a old version of bash installed and used by default on macos
replies(1): >>45732161 #
4. SeeManDo ◴[28 Oct 25 12:49 UTC] No.45732161[source]▶
Even after updating still getting the same error

checked active bash version:

echo $BASH_VERSION

5.3.3(1)-release

replies(1): >>45732400 #
5. ◴[28 Oct 25 12:52 UTC] No.45732195[source]▶
6. seba_dos1 ◴[28 Oct 25 13:09 UTC] No.45732400{3}[source]▶
What's relevant is whether "/usr/bin/env bash" runs the correct one.
replies(1): >>45738395 #
7. kridsdale3 ◴[28 Oct 25 20:06 UTC] No.45738395{4}[source]▶
I used "brew install bash && brew info bash" to get the path, then ran that shell (zsh doesn't work), then inside that new bash, ran the screensaver app.

I found the 4k fullscreen perf in iTerm2 to be not-great, so I did it again in the kitty (GPU powered) terminal macos app, and it was good.