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Work In Progress: Quick prototype of a cargo_crate repository rule #100

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Work In Progress: Quick prototype of a cargo_crate repository rule #100

wants to merge 2 commits into from

Commits on Jun 14, 2018

  1. Set the Rust target platform triplet using the toolchain description 

    This change add a 'triplet' information to the toolchain that is
then used to specify the target platform to Rust.
    @damienmg
    damienmg committed Jun 14, 2018
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  2. Quick and dirty prototype of a cargo_crate repository rule 

    This rule would allow cargo raze to just output a bzl file in remote mode
and then rely on the rule to generate the correct BUILD files.

An exemple of rule that cargo raze could generate would looks like:

```python
cargo_crate(
  name = "ansi_term",  # The crate name
  version = "0.11.0",  # The crate version
  # List of resolved dependency version.
  # If a dependency is needed by the library and absent from this list
  # the cargo_crate rule will emit a warning and not add the dependency in
  # the build rule, making it potentially unable to compile.
  locked_deps = {"winapi": "0.3.5"},
  # Other optional attributes:
  #  - flags: contains a list of rustc flags to add to the rust_{library,binary} rules.
  #  - data: contains the data attribute to propagate to the rust_{library,binary} rules.
  #  - sha256: SHA-256 checksum of the crate, recommended since it enhance Bazel caching.
)
```

To-do:

  [ ] Stabilize API
  [ ] Document
  [ ] Add automated tests
    @damienmg
    damienmg committed Jun 14, 2018
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