GetOpt::Long optional arguments using a colon instead of an equal sign

Instead of writing `foo|f=s` you can also write `foo|f:s` for a GetOpt::Long
option spec [1], thus making the argument optional.

The current implementation of `_spec_to_help` will wrongly render this as two
long options:

    --dirport, --d:9030
       directory port

instead of a short and a long one:

    -d, --dirport=INTEGER
       directory port

This commit fixes the the parsing of the spec, detection of the type and adds
tests for a few common cases this could be used in.

[1] http://perldoc.perl.org/Getopt/Long.html#Summary-of-Option-Specifications

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/Monitoring/Plugin/Getopt.pm b/lib/Monitoring/Plugin/Getopt.pm
index ebdd559..e09ff62 100644
--- a/lib/Monitoring/Plugin/Getopt.pm
+++ b/lib/Monitoring/Plugin/Getopt.pm
@@ -81,7 +81,7 @@ sub _spec_to_help
 {
   my ($self, $spec, $label) = @_;
 
-  my ($opts, $type) = split /=/, $spec, 2;
+  my ($opts, $type) = split /=|:/, $spec, 2;
   my (@short, @long);
   for (split /\|/, $opts) {
     if (length $_ == 1) {
@@ -97,7 +97,7 @@ sub _spec_to_help
       $help .= '=' . $label;
     }
     else {
-      $help .= $type eq 'i' ? '=INTEGER' : '=STRING';
+      $help .= ($type eq 'i' || $type eq '+' || $type =~ /\d+/) ? '=INTEGER' : '=STRING';
     }
   }
   elsif ($label) {