rustpkg incorrectly assumes packages have a crate file at the top level

[catamorphism]

Steps to reproduce:

1. mkdir -p $HOME/workspace/src
2. cd $HOME/workspace/src
3. declare -x RUST_PATH=$HOME/workspace
4. git clone github.com/bjz/gl-rs
5. Edit github.com/bjz/gl-rs/src/gen/registry.rs to replace extern mod sax; with extern mod sax = "github.com/bjz/sax-rs";
6. cd ..
7. rustpkg install gl-rs/src/gen

You will see:

task '<unnamed>' failed at 'assertion failed: pkg_src.start_dir.join(p).exists()', /Users/tjc/rust/src/librustpkg/lib.rs:520
task '<unnamed>' failed at 'receiving on closed channel', /Users/tjc/rust/src/libstd/rt/comm.rs:198

The problem is that rustpkg is assuming there is a gl-rs/main.rs file, when actually the crate file is gl-rs/src/gen/main.rs. The package ID tells us everything we need to know here, but rustpkg is ignoring that.

cc @bjz

[brendanzab]

I also got this:

$ mkdir ~/.rust
$ export RUST_PATH=$~/.rust
$ cd ~/dev/rust
$ git clone github.com/bjz/sax-rs
$ cd sax-rs/src/sax
$ rustpkg install
WARNING: The Rust package manager is experimental and may be unstable
note: Installed package sax-0.1 to /Users/brendan/.rust
$ cd ~/dev/rust
$ git clone github.com/bjz/gl-rs
$ cd gl-rs/src/gen
$ rustpkg install
WARNING: The Rust package manager is experimental and may be unstable
task '<unnamed>' failed at 'assertion failed: pkg_src.start_dir.join(p).exists()', /Users/brendan/dev/rust/rust/src/librustpkg/lib.rs:520
task '<unnamed>' failed at 'receiving on closed channel', /Users/brendan/dev/rust/rust/src/libstd/rt/comm.rs:198

I was trying to work around the fact that rustpkg assumes the top level directory has a crate file. Is this because it is working off the git repo's root directory?

[alexcrichton]

rustpkg has been removed.