Open sources.conf in a text editor. For example, to open it into TextEdit:

%% open -e ${prefix}/etc/macports/sources.conf

Insert a URL pointing to your local repository location before the rsync URL as shown.

file:///Users/julesverne/ports
rsync://rsync.macports.org/macports/release/tarballs/ports.tar [default]

Place the Portfiles you create inside a directory whose name matches the port, which should in turn be placed inside a directory that reflects the port's primary category (the first category entry in the Portfile). For example, to create the directory for a hypothetical port “bestevergame” and to begin editing its Portfile in TextEdit, you can use these commands:

%% mkdir -p ~/ports/games/bestevergame
%% cd ~/ports/games/bestevergame
%% touch Portfile
%% open -e Portfile

See other sections in the Guide for help writing Portfiles. If you've already written the Portfile elsewhere, you can instead copy the Portfile into this directory.

If your Portfile needs to apply any patches to the port's source files, create a files directory and place the patchfiles in it, and reference the patchfiles in your Portfile, as explained in Creating Source Code Patches.

After you create or update your Portfile, use portindex in the local repository's directory to create or update the index of the ports in your local repository.

%% cd ~/ports
%% portindex

Creating software index in /Users/julesverne/ports
Adding port games/bestevergame

Total number of ports parsed:   1
Ports successfully parsed:      1
Ports failed:                   0