Many languages are in the parrot repository, to show, as we add more and more features, how to implement languages. As parrot nears 1.0, these languages are encouraged to leave the nest and find their own repositories. We may keep some educational "how to" languages in the repository as guides for new language developers.
Here are some tips for finding your own place (basically, "this is what partcl did.")
What do you rely on parrot's infrastructure for?
Ticketing? Mailing lists? Version control?
If you're not sure where to go for these things, I recommend setting up a new project using googlecode. The project will give you a ticketing system, a wiki, a subversion repository; you can easily setup mailing lists via google groups.
You don't even need to setup your own repository. If you have a small language and don't need much in the way of infrastructure, you can join squawk and share that repository. This option probably makes sense for the smaller languages.
When partcl left, we abandoned our svn history.
We kept the same licensing and copyright as parrot to keep things simple.
Working with parrot once you're out of the repository
See http://code.google.com/p/partcl/wiki/PartclSource - We have two versions of the project, one to work against a specific release version of parrot (hopefully the latest), and another to work against trunk. This insulates your users from changes in your code or parrot's code, and lets you work against a stable version without having things change out from under you. We
Don't rely on Parrot's top level Configure
Grab a copy of another language's Configure.pl, copy into your directory and update it for your language. This allows you to regenerate your makefile without relying on a top level Configure.pl run.
[2009-03-12, pmichaud]: Languages might want to take a look at the Configure.pl being used for Rakudo's configuration. It provides a --gen-parrot option that automatically downloads and builds the version of parrot specified in build/PARROT_REVISION, then generates a Makefile using that. (Note you will also need the build/gen_parrot.pl script from Rakudo as well to do this.)
As you leave
Once you're in your repository, you should remove your language from the parrot repository. Don't forget to remove your language from the languages makefile and initial configuration.
Moving to github.com: How Parrot Pipp did it
http://github.com is another option for where to fly to after leaving the nest. That's what I, barney, did for Pipp.
Create your local git repository
Mark Glines is maintaining a readonly mirror of the trunk of Parrot's svn repository. This means that the commit history of trunk, but not the branches, is available. So you can relax, the bulk of the work is already done.
cd ~ mkdir git cd git git clone git://squawk.glines.org/parrot-trunk cd parrot-trunk git filter-branch --subdirectory-filter languages/pipp
This leaves you with a git repository containing the content and history of 'languages/pipp'.
Create an account on github.com, if you don't have one yet
github.com offers a public plan with 300 MB diskspace. For creating an account you need to supply an username, your Email-adress and a public SSH-key.
Create an empty repository
In your github startpage there is a link labelled 'Create a Repository'. Click that and follow the instructions for creating an empty repository called 'pipp'. Don't worry too much about the name, you can always change it later.
Push your local repository onto github
github offers instruction for starting am empty initial repository. We already have code and history, so we need to do things a little bit differently.
Pushing the project onto github can then be done with:
cd ~/git/parrot-trunk git remote rm origin git remote add origin firstname.lastname@example.org:bschmalhofer/pipp.git git remote show origin git status git push origin master
See the result on http://github.com/bschmalhofer/pipp/tree/master.
Usually one would want to stick with Artistic License 2.0. Added a LICENSE file.
Nor sure, whether copyright messages should be added.
Removal from the SVN repository
For removing the language from SVN, I recommend to work on a svn-checkout of the repository. Remove the language from svn by doing 'ack-grep -ial pipp' and remove the references to the language. The language directory can be deleted with 'svn del languages/pipp'. I left the occurences of 'eclectus' in 'ports/cygwin' intact, as I didn't want to break patch files. Also I edited the svn:ignore list: 'svn pe svn:ignore languages', as pipp will be checked out into 'languages'. Make sure that you have run 'perl tools/dev/mk_manifest_and_skip.pl' before submitting the changes.
Make it easy for others to checkout the new repository
Added the target 'co-pipp' and ammended the target 'co-all' in 'config/gen/makefiles/languages.in'. Added the target 'up-pipp' and ammended the target 'up-all' in 'config/gen/makefiles/languages.in'.
Tell the world about it
Edit https://trac.parrot.org/parrot/wiki/Languages and write about it in your blog.