zshrc: add special code for cdt() for FreeBSD

[moviuro]

While there, fix whitespace

--

root@fbsd ~ # which cdt
cdt () {
        local -a cdttemplate
        if [ "$#" -eq 1 ]
        then
                if isfreebsd
                then
                        cdttemplate=(-t "$1") 
                else
                        cdttemplate=(-t "$1".XXXXXXX) 
                fi
        fi
        builtin cd "$(mktemp -d ${cdttemplate[@]})"
        builtin pwd
}
root@fbsd ~ # cdt grml
/tmp/grml.YFIkcJQw71
root@fbsd /tmp/grml.YFIkcJQw71 # uname -a
FreeBSD fbsd.local 14.2-RELEASE-p1 FreeBSD 14.2-RELEASE-p1 GENERIC amd64

Improves #203

[zeha]

Could I ask you explain the FreeBSD behaviour? From just the manual page link I don't understand what the difference is between coreutils mktemp and freebsd mktemp.

[zeha]

okay, i got myself a freebsd VM.

the problem is:

root@freebsd:~ # mktemp -d -t test.XXXXXX
/tmp/test.XXXXXX.Z0aj1NfauX

where with coreutils:

% mktemp -d -t test.XXXXXX
/tmp/test.Wi46it

what an annoying difference. should probably still put some details into the comment

[mika]

Wow, TIL. LGTM, though I'm a huge fan of having details like "what's broken/why this change/..." in the commit message! :) (Please consider this a nitpick from my side only :))