View the most recent changes for the oniguruma5 port at: oniguruma5.darwinports.com/diff
Scroll down toward the bottom of the page to get installation instructions for oniguruma5.
The raw portfile for oniguruma5 5.9.1 is located here:
http://oniguruma5.darwinports.com/dports/devel/oniguruma5/Portfile
Find related portfiles with the unique DarwinPorts.com search feature.
Check for any related Fink projects here: pdb.finkproject.org/pdb/package.php/oniguruma5

The oniguruma5 Portfile 37089 2008-05-26 16:35:42Z simon macports.org $

PortSystem 1.0
Name: oniguruma5
Version: 5.9.1
Maintainers: nomaintainer
Category: devel
Platform: darwin
Homepage: http://www.geocities.jp/kosako3/oniguruma/

Description: A regular expressions library.
Long Description: Oniguruma is a regular expressions library in which different character encoding can be specified for every expression. Supports Unicode Porperty/Script. N.B. 5.x is unrelated to Ruby.

distname onig-${version}
Master Sites: http://www.geocities.jp/kosako3/oniguruma/archive/
Checksums: md5 5ce5f9bba5e83f0ea6ec24e1ac77091c

If you haven't already installed Darwin Ports, you can find easy instructions for doing so at the main Darwin Ports page.
Once Darwin Ports has been installed, in a terminal window and while online, type the following and hit return:

%  cd /opt/local/bin/portslocation/dports/oniguruma5
%  sudo port install oniguruma5  
Password: 

You will then be prompted for your root password, which you should enter. You may have to wait for a few minutes while the software is retrieved from the network and installed for you. Y ou should see something that looks similar to:

--->  Fetching oniguruma5
--->  Verifying checksum for oniguruma5
--->  Extracting oniguruma5
--->  Configuring oniguruma5
--->  Building oniguruma5 with target all

--->  Staging oniguruma5 into destroot

--->  Installing oniguruma5

- Make sure that you do not close the terminal window while Darwin Ports is working. Once the software has been installed, you can find further information about using oniguruma5 with these commands:

%  man oniguruma5
%  apropos oniguruma5
%  which oniguruma5
%  locate oniguruma5

 Where to find more information: