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Using the OCaml compiler

Package​

esy installs the OCaml compiler packaged for NPM. While, as a user, this shouldn't affect your workflow, here are the reasons why esy doesn't use the compiler packages from Opam repository.

  1. When esy project was started, the compiler wasn't available on OPAM
  2. esy doesn't use the compiler variants layout
  3. Makes it easy to use the solver.

Version​

Since the package is hosted on NPM, it's also necessary to use semver to specify the compiler version. We recommend that users specify only the major version to easily get the patch and minor releases

Example: 4.x, 5.x, 5.1.x

We advise against specifying the full version (eg: 4.14.0) as patches released by wont be seen by the solver.

Compiler variants​

To install variants of the compiler like flambda, musl-static etc, specify the semver tag.

{
  "ocaml": "4.10.1002-musl.static.flambda",
}

Note that the compiler doesn't need patches to work with esy