wip: build rust project & travis CI setup

[awerlang]

This is a work in progress. This needs some help to get it done.

• output is inside vendor/release/build: the gotcha is the filename isn't deterministic, something random is appended to it
• Travis CI doesn't supports Windows builds
• AppVeyor does, but doesn't support Rust
• No NPM publishing yet but it should be part of it I guess
• At least it should now be possible to build on Windows locally, given Rust & dependencies are installed

Closes #4

[fhemberger]

Wow, thanks! This looks great already.

So I think the only thing I need to add is:

• instead of ls vendor/release/build,

  mkdir bin && mv vendor/release/build/dssim-* bin/dssim-`uname | tr '[:upper:]' '[:lower:]'`

  adds darwin or linux (can't use TRAVIS_OS_NAME in this case) – precompiled binaries should be included in the release

• In lib/install.js, check if there's already a file dssim-${process.platform} and skip compilation
• Get the binaries into the npm release, https://docs.travis-ci.com/user/deployment/npm/

Right?

[awerlang]

The current issue is identifying the correct output

• cargo build --release
  • produces dssim-abfa771b3e367bdd and dssim-b570b544a7581cc3
• cargo build --release --bin dssim
  • error: no bin target named dssim
• cargo build --release --bin main
  • error: no bin target named main
• cargo build --release --bins
  • no output

It may be related to a convention where programs should be placed inside src/bin but in the archive both main.rs and lib.rs are in the same directory.

After this, is it possible to deploy to npm binaries produced in separate jobs (linux & os x) straight from travis?

[fhemberger]

Ok, found one source of the problem. You were still pulling v1.3.3 of dssim, not the 2.x release. I map the dssim version number to the version of the npm package.

Updating to the current 2.9.4 release gives me a proper binary: vendor/release/dssim. See https://github.com/fhemberger/dssim-bin/pull/6 for my test PR.

[awerlang]

You're right! But still this is the output in travis:

$ ls vendor/release/build
rayon-core-29a42b65b777dc05  rayon-core-af02fc9cf039ecce

[awerlang]

Another option, as suggested to me on S.O., is to use the cargo install command directly.

cargo install dssim --version ${version}

Only I don't know how we could pass the version to travis.

[fhemberger]

Binary is in vendor/release, not vendor/release/build.

[awerlang]

Great

[fhemberger]

@awerlang Sorry it took so long, merged your PR. Thanks! I'm not sure yet how to proceed with the Rust build.