[illuminati pants (master)]$ rm -rf ~/.cache
[illuminati pants (master)]$ ./pants
A pants owned rustup installation could not be found, installing via the instructions at <https://www.rustup.rs> ...
info: downloading installer
info: syncing channel updates for 'stable-x86_64-apple-darwin'
info: downloading component 'rustc'
 31.9 MiB /  31.9 MiB (100 %)  13.1 MiB/s ETA:   0 s                
info: downloading component 'rust-std'
 42.4 MiB /  42.4 MiB (100 %)  11.6 MiB/s ETA:   0 s                
info: downloading component 'cargo'
info: installing component 'rustc'
info: installing component 'rust-std'
info: installing component 'cargo'
info: default toolchain set to 'stable'

  stable installed - rustc 1.15.1 (021bd294c 2017-02-08)

info: using existing install for 'stable-x86_64-apple-darwin'
info: override toolchain for '/Users/kwilson/dev/pants' set to 'stable-x86_64-apple-darwin'

  stable-x86_64-apple-darwin unchanged - rustc 1.15.1 (021bd294c 2017-02-08)

    Updating git repository `<https://github.com/stuhood/futures-rs>`
    Updating registry `<https://github.com/rust-lang/crates.io-index>`
 Downloading crossbeam v0.2.10
 Downloading lazy_static v0.2.2
 Downloading fnv v1.0.5
 Downloading log v0.3.6
 Downloading num_cpus v1.2.1
 Downloading libc v0.2.20
   Compiling engine v0.0.1 (file:///Users/kwilson/dev/pants/src/rust/engine)
warning: type alias is never used: `Rule`, #[warn(dead_code)] on by default
   --> src/rust/engine/src/rule_graph.rs:134:1
    |
134 | type Rule = Task;
    | ^^^^^^^^^^^^^^^^^

    Finished release [optimized + debuginfo] target(s) in 28.55 secs
No goals specified.
Use `pants goals` to list goals.
Use `pants help` to get help.
[illuminati pants (master)]$ git rev-parse HEAD
b0b1adaae3389e77354062f259f2d65f17efae0c