Support zsh in call_host.sh

[clelange]

I'm using zsh for most of my work, which is currently not supported by the call_host.sh script. I've made it work by identifying the bash-specific parts and changing those to functions. I've also introduced a function to identify if zsh is used and another one to prevent duplicating the bind paths when accidentally sourcing the call_host.sh script more than once.

[kpedro88]

@clelange thanks for this contribution! tagging @NJManganelli here because he had also expressed interest in zsh support.

I won't have time to review this in depth until next week, but I wanted to acknowledge receipt.

[kpedro88]

In the meantime, you can try to placate shellcheck...

[NJManganelli]

I had hacked together a minimal translation and had no time to clean it up, but even at a glance this is better and more functional. I can hopefully test it as a replacement for my hacked version later

[clelange]

In the meantime, you can try to placate shellcheck...

This should be OK now.

[clelange]

Thanks for the careful review. I'm not sure I'll be able to address everything this week, but if not, I'll pick this up in the second half of next week.

[kpedro88]

@clelange just checking on this

[clelange]

Hey, yes, it's on my list but I haven't managed to get back to it yet.

[clelange]

I hope I have managed to address all suggestions @kpedro88

[kpedro88]

@clelange everything looks good except the one remaining eval that still seems unnecessary to me

[clelange]

You're right, I've fixed that and gave it another pass, which led to another grep-related fix of a bug that I had introduced.