On Fri, 2021-11-12 at 19:48 +0100, Andreas Schwab wrote:
> FILE1 -nt FILE2 True if file1 is newer than file2 (according to
> modification date).
>
> Andreas.
>
So now we have a relation for 'older than' and for 'newer than', but how about
'oldest' (executable), and 'newest' (executable)?
I could only come up with this:
unset y; for x in $(find bin -mindepth 1 -name "*"); do if [[ ${x} -nt ${y} ]];
then y=${x}; fi; done; echo newest: ${y};
y="bin"; for x in $(find bin -mindepth 1 -name "*"); do if [[ ${x} -ot ${y} ]];
then y=${x}; fi; done; echo oldest: ${y};
As you can see, the way the commands are initialized is not identical, because:
'-nt' returns a true when 'if file1 exists and file2 does not' (y in
initialized by the first condition evaluated)
'-ot' returns a true when 'if file2 exists and file1 does not' (y is not
initialized by the first condition evaluated)
When you try to selectively link new executables, I think it is important that
you do not only have relations for 'older than' and 'newer than', but also
consistent (identically initializated)
relations for 'oldest' and 'newest'.
Mischa.
