Add support for multiple [[lib]]s in a package.

[huonw]

This is totally the naivest method possible for allowing multiple [[lib]]s (change &libs[0] to a loop over libs) and so is likely incorrect. Feel free to reject.

[wycats]

I'd rather support multi-package repos than multi-lib packages.

[huonw]

Discussed on IRC.

[steveklabnik]

Maybe link to the log while it's handy, for posterity?

[huonw]

I don't think #cargo has logging yet; here's the transcript:

[09:28:13] <huon> wycats: acrichto: r? https://github.com/rust-lang/cargo/pull/79
[09:28:29] <wycats> I'm not actually in favor of this :P
[09:28:37] <wycats> I think we should support multi-package repos
[09:28:42] <wycats> not multi-lib packages
[09:28:51] <wycats> huon: ^
[09:29:04] <o11c> wycats: but syntax extensions
[09:29:13] <wycats> o11c: put them in a separate package in the same repo
[09:29:21] <huon> wycats: yeah, I assumed that there'd be something like that
[09:29:29] <wycats> huon: I want [meta-package]
[09:29:30] <o11c> multi-lib package conceptually sounds better for that case
[09:29:33] <huon> since the implementation was so simple
[09:29:47] <wycats> which just lists out the package roots contained in the repo
[09:29:52] <wycats> and then the PathSource can use that
[09:29:59] <wycats> (GitSource uses PathSource)
[09:30:09] <wycats> to return a list of packages rather than one
[09:30:16] <huon> as background: why are binaries different to libs in this case?
[09:30:26] <wycats> because you extern libs
[09:30:29] <wycats> but not bins
[09:31:04] <wycats> if I have a package foo
[09:31:10] <wycats> I can easily map extern crate foo if there's one lib
[09:31:15] <wycats> if there are two libs, which one do I pull in?
[09:31:22] <wycats> (there are several issues along those lines)
[09:31:31] <wycats> (I think it's cleaner for packages to represent a single crate)
[09:31:35] <wycats> (so the names are ==)
[09:31:55] <o11c> hm, does cargo have a way to do handle demos?
[09:32:19] <huon> wycats: ah, then why does [[lib]] have a name field?
[09:32:31] <wycats> huon: in theory it should not
[09:32:35] <wycats> but [[lib]] // no contents
[09:32:37] <wycats> seems O_O
[09:32:40] <huon> haha
[09:32:45] <wycats> all of this can be addressed once the metadata RFC lands
[09:32:48] <wycats> which will allow src/lib.rs
[09:32:52] <wycats> and just inferring the info
[09:32:52] <huon> ok, cool.

[wycats]

Can we get logging? Who do we have to ask?

[steveklabnik]

23:47 < huon> does #cargo have logging?
23:48 -!- Rym [y@3198499C.452D6F23.8772DA20.IP] has quit [Ping timeout]
23:49 < steveklabnik> huon: <3. https://botbot.me/mozilla/cargo/
23:49 < steveklabnik> apparently not?
23:49 -!- Rym [y@3198499C.452D6F23.8772DA20.IP] has joined #cargo
23:49 < steveklabnik> but yeah, i've had 'discussed on campfire' come back and bite 
                      me
23:49 < steveklabnik> heh
23:49 < huon> yay for copy-paste :)
23:50 < steveklabnik> https://botbot.me/request/
23:50 < steveklabnik> looks like
23:50 < steveklabnik> who has op?

😉 ❤️

[wycats]

can haz log? 👍