Make output truncation behavior more flexible

[rh-jkangas]

(Feature request)

Currently commands like jmp get exporters truncate output based on the terminal width:

$ stty -a | head -1
speed 38400 baud; rows 30; columns 67; line = 0;
$ jmp get exporters -l device=nxp-s32g-vnp-rdb3-01
NAME                  LABELS
nxp-s32g-vnp-rdb3-01  board-type=nxp-s32g-vnp-rdb3,device=nxp-s32g…

But it'd be nice to have a couple of options here:

1. If stdout isn't a terminal, don't truncate the output by default, like other CLI tools typically do.

2. Allow overriding the default behavior from the command line. E.g., --width|-w (-1|positive_int). Manually overriding COLUMNS can also do this, although it feels a little hacky:

   $ COLUMNS=9999 jmp get exporters -l device=nxp-s32g-vnp-rdb3-01
   NAME                  LABELS
   nxp-s32g-vnp-rdb3-01  board-type=nxp-s32g-vnp-rdb3,device=nxp-s32g-vnp-rdb3-01,enabled=true,<snip>
   

[mangelajo]

I agree, this is not ideal :)

for automation we always have -o yaml / -o json + yq/jq

But sometimes it's just a pipeline somewhere where you just don't want truncation.

[rh-jkangas]

As a hacky workaround for the piping bit, I put this in my .bash_aliases and it's saved me some typing 😛

jmp() {
    if [ -t 1 ]; then
        command jmp "$@"
    else
        COLUMNS=9999 command jmp "$@"
    fi
}