tree 8ccd27a24002f60afa2ea532dffe75cc3108200e
parent bcad037697bf062dc1f3471893c6225dd42dfffc
author Ian Wienand <iwienand@redhat.com> 1447296756 +1100
committer Ian Wienand <iwienand@redhat.com> 1447886253 +1100

Add vercmp function

The existing vercmp_numbers function only handles, as the name says,
numbers.  I noticed that "sort" has had a version sort for a long time
[1] and, rather than re-implement it badly, use this as a version of
vercmp that works a bit more naturally.

This is intended to be used in an "if" statement as in

  prog_ver=$(prog_ver --version | grep ...)
  if vercmp $prog_ver "<" 2.0; then
     ...
  fi

A test-case is added to test the basic features and some edge-cases.

[1] http://git.savannah.gnu.org/gitweb/?p=coreutils.git;a=commitdiff;h=4c9fae4e97d95a9f89d1399a8aeb03051f0fec96

Change-Id: Ie55283acdc40a095b80b2631a55310072883ad0d