|Version 16 (modified by bgamari, 15 months ago)|
Quick Start hacking guide
This page describes the new Hackage server.
To build the latest Hackage code:
darcs get http://code.haskell.org/hackage-server/ cd hackage-server cabal install http://code.haskell.org/~duncan/HTTP-4000.1.3.20111008.tar.gz cabal install --only-dependencies [--dry-run] cabal configure -O0 cabal build
Yes, you do need the snapshot of the HTTP package, at least until version 4000.1.3 or later is released. It has some fixes that the mirror client requires.
The following commands run the server in the current build tree:
dist/build/hackage-server/hackage-server init --static-dir=static/ dist/build/hackage-server/hackage-server run --static-dir=static/
By default the server runs on port 8080 with the following settings:
URL: http://localhost:8080/ username: admin password: admin
To specify something different, see hackage-server init --help for details.
The server can be killed by using:
This will save the current state and shutdown cleanly. Running again will resume with the same state.
To reset everything, kill the server and delete the server state:
rm -rf state/
Note that the static/ and state/ directories differ: static is for static html and other files. The state directory holds information about the database, using acid-state.
Creating users & uploading packages
List of registered users:
Register new users:
Currently there is no restriction on registering, but only an admin user can grant privileges to registered users e.g. by adding them to other groups. In particular there are groups:
- admins http://localhost:8080/users/admins/ -- administrators can do things with user accounts like disabling, deleting, changing other groups etc.
- trustees http://localhost:8080/packages/trustees/ -- trustees can do janitorial work on all packages
- mirrors http://localhost:8080/packages/mirrorers/ -- for special mirroring clients that are trusted to upload packages
- per-package maintainer groups http://localhost:8080/package/foo/maintainers -- users allowed to upload packages
Currently any registered user can upload new packages i.e. new names (we may want to review this), but only people in the package maintainer group can upload new versions of existing packages.
There is a program included in the hackage-server package called hackage-mirror. This should now work OK. It's intended to enable syncing all the packages from one server to another, e.g. getting all the packages from the old hackage and uploading them to a local instance of a hackage-server. The mirror client basically works, though it does not yet copy over the name of the original uploader or original upload date. In addition, not all packages can be mirrored yet because the new server rejects packages that use non-standard tar formats. That will need to be fixed in the tar package and in the server (we want to keep strict checking for ordinary uploads, just not for old existing packages).
To try it out:
- Make sure you have built the mirror-client against a version of HTTP with the latest patches applied, e.g. http://code.haskell.org/~duncan/HTTP-4000.1.3.20111008.tar.gz
- Add a user to the mirrorers group by navigating to http://localhost:8080/packages/mirrorers/
- Run the client with the two server URLs and credentials for the server you want to mirror to. For example, if the server is running locally and your mirrorer is the default "admin" user with password "admin" then do:
hackage-mirror http://hackage.haskell.org http://admin:admin@localhost:8080
This will do a one-time sync, and will bail out at the first sign of trouble. You can also do more robust and continuous mirroring. Use the flag --continuous. It will sync every 30 minutes (configurable with --interval). In this mode it carries on even when some packages cannot be mirrored for some reason and remembers them so it doesn't try them again and again. You can force it to try again by deleting the state files it mentions.
- Change the server to allow the mirror client to set the upload user name and date. Change the mirror client to copy the upload name and date from the source index. The point is, mirrored packages should have the info from the original package, and not appear to have been uploaded by the mirroring client itself.
- HackageDB and HackageToDo
- HackageDB/2.0/OldURIs - the documents and scripts in hackage-scripts' directory tree
- HackageDB/2.0/URIs - the planned new URIs and how to interact with them
- HackageDB/2.0/Architecture - ideas and implementations for internal code organization
- HackageDB/2.0/CommandLine - how to use the command line interface
- HackageDB/2.0/Switchover - Roadmap for hackage-server and the eventual switch to it.
- update use of acid-state so that it's properly modular, rather than the current monolithic shim.
- convert to modular use of type-safe URLs
People to ask
You should join the cabal-devel mailing list. There are a number of people there who are interested or are working on bits of hackage. That's the place to ask questions, post patches for review etc.
As for specific people, ask Duncan (dcoutts on irc) and Matt (Gracenotes on irc). Duncan knows the general design ideas and strategy. Matt did his GSoC project last year on improving the server.
There is a #hackage irc channel where you will find some interested people. * rio bouygues