proto-lens-setup

This package provides Cabal support for the proto-lens package. It automatically generates Haskell source files from protocol buffer files (.proto).

To generate Haskell modules for a Cabal package, import Data.ProtoLens.Setup from the Setup.hs file. For example:

import Data.ProtoLens.Setup -- Here, "src" is the directory where .proto source files may be found main = defaultMainGeneratingProtos "src"

Then, edit the .cabal file of your project to:

Specify build-type: Custom, and add a custom-setup clause that depends on proto-lens-setup. List the .proto files in extra-source-files. Note that the field belongs at the top level of the .cabal file, rather than once per library/executable/etc. List the generated modules (e.g. Proto.Foo.Bar) in exposed-modules or other-modules of the rule(s) that use them (e.g. the library or executables). Additionally, add proto-lens-runtime to the build-depends of those rules.

For example, in foo-bar-proto.cabal:

build-type: Custom extra-source-files: src/foo/bar.proto ... custom-setup setup-depends: base, Cabal, proto-lens-setup

library exposed-modules: Proto.Foo.Bar, Proto.Foo.Bar_Fields autogen-modules: Proto.Foo.Bar, Proto.Foo.Bar_Fields build-depends: proto-lens-runtime, ...