Make Updater.sh shell agnostic

[asimovc]

My distros use busybox ash and the Updater.sh is using bash to work. I think making shell agnostic is better for just works in all systems.

Wha i expect is it just run as normal and i get this instead.

env: can't execute 'bash': No such file or directory

[yusuf-daglioglu]

Not all bash scripts are compatible with Shell: https://www.gnu.org/software/bash/manual/html_node/Shell-Compatibility-Mode.html

Therefore all script file should tested before run other interpreters.

But ash is a shell implementation. Most of OS put /bin/sh to reference to default interpreter (which in your case /bin/ash). So for temporary solution on your local machine you try to change first line:

https://github.com/arkenfox/user.js/blob/master/updater.sh#L1

as:

#!/bin/sh

or

#!/usr/bin/env sh

And run the script directly from your terminal. Then you can tell us the results please :) You will be the first tester :)

[sertonix]

The current scripts uses a lot more bash extensions than supported by busybox ash. You check that with shellcheck 0.10.0+ quit easily: shellcheck -s busybox -S error -e SC3036 *.sh

Compatibility with more shells would only work when using a simpler standard like POSIX shell.

[asimovc]

@yusufdaglioglu when i put #!/usr/bin/env sh i get this

./updater.sh: line 20: syntax error: bad substitution
./updater.sh: line 21: syntax error: bad substitution

[MagicalDrizzle]

checkbashisms and shellcheck would be useful if anyone is willing to port the script. (former is just a perl script, latter is both cross-platform and has a browser version).
currently the script does make use of select which doesn't have any pure sh equivalent, so unfortunately it's not trivial...