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Gregory_M

Member

Registered: 2024-11-30

Posts: 35

Potential Suggestion Regarding Use of "eval" by makepkg

Oils shell, "osh" is designed to be "bash" shell compatible.

I changed a copy of Arch Linux "makepkg" script to use osh instead of "bash" in the shebang line.
Testing on a PKGBUILD: 10 errors or so, about "eval".

I think that osh purposefully avoids implementation of "eval" in favor of better methods.

https://stackoverflow.com/questions/183 … d-practice

Last edited by Gregory_M (2025-11-07 00:53:51)

Allan

Pacman

From: Brisbane, AU

Registered: 2007-06-09

Posts: 11,607

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Re: Potential Suggestion Regarding Use of "eval" by makepkg

If osh does not implement eval, then it is not bash compatible.   I just looked at the eval use in makepkg and it all is mostly being done as eval is intended to be used. There are a few places where we could use bash-4.3+ features to avoid the eval, but these are in the minority, and makepkg has only recently bumped the bash requirement that recent.

BTW, your link is about eval in python.

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WorMzy

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From: Scotland

Registered: 2010-06-16

Posts: 13,112

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Re: Potential Suggestion Regarding Use of "eval" by makepkg

Mod note: moving to Pacman discussion.

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Gregory_M

Member

Registered: 2024-11-30

Posts: 35

Re: Potential Suggestion Regarding Use of "eval" by makepkg

There are a few places where we could use bash-4.3+ features to avoid the eval, but these are in the minority, and makepkg has only recently bumped the bash requirement that recent.

Thanks kindly for info.

If osh does not implement eval, then it is not bash compatible.

Thank you. I thought the issue was eval missing, but looking further, osh appears to have eval, so I pursued your sound reasoning path there and am discussing with the osh developers.

Ignore of course, unless curious...
This shows the errors that I encountered using osh: https://github.com/oils-for-unix/oils/issues/2556

I'm happy to post back here if I am able run a successful makepkg using osh (in case interesting to know).

Last edited by Gregory_M (2025-11-07 08:20:24)

twelveeighty

Member

Registered: 2011-09-04

Posts: 1,412

Re: Potential Suggestion Regarding Use of "eval" by makepkg

Is there a debug mode for osh? Because the error you have in that Github issue post contradicts itself - it expects a "Str", but got a "Str":

Keys op expected Str, BashArray, or BashAssoc, got Str

Btw: if I read their "Project Goals" correctly, they are NOT aiming to be Bash compatible, but rather an extension similar to Typescript being an extension to JavaScript. But this is the first I heard of osh, so I could be wrong.

Gregory_M

Member

Registered: 2024-11-30

Posts: 35

Re: Potential Suggestion Regarding Use of "eval" by makepkg

Is there a debug mode for osh? Because the error you have in that Github issue post contradicts itself - it expects a "Str", but got a "Str":

Keys op expected Str, BashArray, or BashAssoc, got Str

Hi, yes, the error itself needs improvement. I am a fellow victim of the confusing message, not the spokesperson for osh. :-)  (RE: osh bash compatibility, yes, it's intended. [Off topic, unless using for Arch, e.g. makepkg] Refer to osh for info. pacman shows link.)

pacman -Si oil

Last edited by Gregory_M (2025-11-12 01:24:58)