Why should I bother with POSIX compliant scripting?

[CaffeineAddict]

I agree it slows things down. But at least it usually finds it.

So it's the same thing as ensuring that bash is in PATH so that it can be found?

 

[f33dm3bits]

bash already does those things by default. I have noticed some distro do have an auto-complete plugin for bash.

I knew that one existed but none like these:

zsh-history-substring-search
zsh-syntax-highlighting

I have looked for them in the past for bash and because I couldn't find anything like them I switched to zsh at some point.

 

[f33dm3bits]

zsh-history-substring-search zsh-syntax-highlightingI have looked for them in the past for bash and because I couldn't find anything like them I switched to zsh at some point.

Fish shell has these out of the box but doesn't play well with bash.

fish shell

A smart and user-friendly command line shell

fishshell.com

 

[osprey]

Some clarifying information which may be of interest:

This is from debian's wiki:

The default non-interactive shell on POSIX environments is an executable located on the filesystem at /bin/sh, which is a symbolic link to the default shell. Most system scripts use this, via the #!/bin/sh shebang. Changing a system's default non-interactive shell is simply a matter of changing that symbolic link to target a different executable.

In all releases up to and including DebianLenny, Bash was the default non-interactive shell. Beginning with DebianSqueeze, Debian uses Dash (the Debian Almquist shell) as the target of the /bin/sh symlink. Dash lacks many of the features one would expect in an interactive shell, which allows it to be faster and more memory efficient than Bash.

See: https://wiki.debian.org/Shell

According to wikipedia here: https://en.wikipedia.org/wiki/Almquist_shell, dash is almost compliant with POSIX but doesn't include these features required by POSIX:
internationalization and localization, and multi-byte character encoding.

Zsh appears not to be POSIX compliant. From the zsh docs about zsh on page 1:

It does not provide compatibility with POSIX or other shells in its default operating mode.

See: https://zsh.sourceforge.io/Doc/zsh_a4.pdf

Zsh can be made to be POSIX compliant according to arch by use of the "emulate sh" option. See: https://wiki.archlinux.org/title/Zsh

It may also be possible by use of the environment variable: POSIX_BUILTINS. See: https://zsh.sourceforge.io/Guide/zshguide02.html#l10

Bash has the --posix option about which the man page informs:

Change the behavior of bash where the default operation differs from the POSIX standard to match the standard (posix mode)

 

[spacebanana]

You are making something for yourself, you can use whatever you want to, you don't have to use something that is POSIX-compliant if you don't want to