bzr-plugin-info [suggest plugins at runtime]
robertc at robertcollins.net
Mon Mar 1 08:18:37 GMT 2010
So a while back we had this plan, to scan plugins for metadata, build a
db, and advertise plugins in the client.
It kindof stalled, but I found time to move it forward a bit again
bzr-plugin-info now hooks get_missing_command, and has the ability to
write a db from its 'plugin-info' command. If you install bzr-plugin
info and try something like 'bzr git-import' or 'bzr up-thread' when you
have neither bzr-git or bzr-loom installed, you should get something
$ bzr git-import
Command 'git-import' is not available at the moment.
The following plugins include this command:
* git (branch available ../../git/trunk)
The ../../path is because I scanned locally. Many plugins are missing
metadata, and a number couldn't be scanned. So I've improved plugin-info
to scan successfully in more cases, and submitted patches so that
scanning does not error to all the plugins I had locally.
What does this mean to you, as a plugin author?
For the docs: you should advertise the commands you ship,the formats you
provide or can read, so that bzr plugin-info can scan your plugin.
To test, just point it at your local disk:
bzr plugin-info .
I think a sensible next step would be to expand the metadata spec to
accommodate hooks as well as some advertising docs, home page etc. (Some
of these are available from setup.py PKG_INFO, but you have to build
that to get at it: perhaps we should teach plugin-info how to do that as
I'd like to see this (with a better list of urls) shipped to users by
default in Lucid; we don't need it to be much more comprehensive; we
don't need to have this perfect first, after all.
We could ship it by default a few different ways:
- bundle as a plugin in core
- recommend: in the binary packaging (and suggest other platforms do
I don't have a strong preference. I have a weak preference to keep it
outside the core: its been good for the core to prepare for this plugin,
and I like to keep that clarity.
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