Files

#!/bin/bash
shopt -s inherit_errexit
set -euo pipefail
IFS=$'\n\t'

source `type -P argmod`
# sourcing this gets you a function "_argmod"

# "Files" is somewhat unique, in the sense that it is pasted from the
# output of `diff -qr`, which does NOT quote the filenames if they have
# spaces in them.  Extracting the filenames separately allows us to deal
# with them; if you extracted them together, as "%1 %2", you wouldn't know
# where one filename ended and the other began if either or both the filenames
# had spaces in them.

_argmod "$@" <<<"%% and %% differ => %1"; f1="${args[@]}"
_argmod "$@" <<<"%% and %% differ => %2"; f2="${args[@]}"

totalsize=$(wc -c "$f1" "$f2"| grep total | cut -f1 -d' ')
#                 50..MB..
[[ $totalsize -gt 50000000 ]] && {
    ls -al  "$f1" "$f2"
    cmp     "$f1" "$f2"
    return
}

vimdiff "$f1" "$f2"