load(
    "@io_tweag_rules_haskell//haskell:haskell.bzl",
    "haskell_library",
    "haskell_test",
)

package(
    default_testonly = 1,
    default_visibility = ["//visibility:public"],
)

genrule(
    name = "generate-genmodule",
    outs = ["src/GenModule.hs"],
    cmd = "printf 'module GenModule where\na = 1 :: Int' > $@",
)

haskell_library(
    name = "GenModule",
    srcs = [":generate-genmodule"],
    src_strip_prefix = "src",
    deps = ["//tests/hackage:base"],
)

genrule(
    name = "generate-binmodule",
    outs = ["src/BinModule.hs"],
    cmd = "printf 'module BinModule where\nb = 2 :: Int' > $@",
    output_to_bindir = 1,
)

haskell_library(
    name = "BinModule",
    srcs = [":generate-binmodule"],
    src_strip_prefix = "src",
    deps = ["//tests/hackage:base"],
)

genrule(
    name = "generate-main",
    outs = ["src/Main.hs"],
    cmd = "printf 'module Main where\nimport GenModule\nimport BinModule\n" +
          "main = print (a+b) :: IO ()' > $@",
)

haskell_test(
    name = "generated-modules",
    size = "small",
    srcs = [":generate-main"],
    src_strip_prefix = "src",
    deps = [
        ":BinModule",
        ":GenModule",
        "//tests/hackage:base",
    ],
)