How to increment version number in a shell script?

Question

The following simple version control script is meant to find the last version number of a given file, increment it, run a given command with the newly created file (e.g., ed

Answer 1

Tired of bash? Why not try Perl?

$ cat versions
1.2.3.44
1.2.3.9
1.2.3
9

$ cat versions | perl -ne 'chomp; print join(".", splice(@{[split/\./,$_]}, 0, -1), map {++$_} pop @{[split/\./,$_]}), "\n";'
1.2.3.45
1.2.3.10
1.2.4
10

Not quite in compliance with the requirement, of course.