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feat(third_party/bazel): Check in rules_haskell from Tweag

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Vincent Ambo 2019-07-04 11:18:12 +01:00
parent 2eb1dc26e4
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46
third_party/bazel/rules_haskell/tools/runfiles/BUILD.bazel vendored Normal file
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load(
"@io_tweag_rules_haskell//haskell:haskell.bzl",
"haskell_library",
"haskell_test",
)
haskell_library(
name = "runfiles",
srcs = ["src/Bazel/Runfiles.hs"],
src_strip_prefix = "src",
visibility = ["//visibility:public"],
deps = [
"@hackage//:base",
"@hackage//:directory",
"@hackage//:filepath",
],
)
haskell_test(
name = "bin",
testonly = 1,
srcs = ["bin/Bin.hs"],
data = ["bin-data.txt"],
src_strip_prefix = "bin",
deps = [
":runfiles",
"@hackage//:base",
"@hackage//:filepath",
],
)
haskell_test(
name = "test",
srcs = ["test/Test.hs"],
data = [
"test-data.txt",
":bin",
],
src_strip_prefix = "test",
deps = [
":runfiles",
"@hackage//:base",
"@hackage//:filepath",
"@hackage//:process",
],
)

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# Bazel Runfiles
This is a small utility to enable discovery of the Bazel runfiles location. This is useful in tests for example.
```haskell
module Main (main) where
import qualified Bazel.Runfiles as Runfiles
import Control.Monad (when)
import System.Process (callProcess)
main :: IO ()
main = do
r <- Runfiles.create
foo <- readFile (Runfiles.rlocation r "io_tweag_rules_haskell/tools/runfiles/test-data.txt")
when (lines foo /= ["foo"]) -- ignore trailing newline
$ error $ "Incorrect contents: got: " ++ show foo
callProcess (Runfiles.rlocation r "io_tweag_rules_haskell/tools/runfiles/bin") []
```

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third_party/bazel/rules_haskell/tools/runfiles/bazel-runfiles.cabal vendored Normal file
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-- This file has been generated from package.yaml by hpack version 0.28.2.
--
-- see: https://github.com/sol/hpack
--
-- hash: bd1c2ce5b0ffa0157650e1c2409d31b818889736ef09aaf51de71e54d9a7d3fc
name: bazel-runfiles
version: 0.7.0.1
synopsis: Locate Bazel runfiles location
description: Please see the README on GitHub at <https://github.com/tweag/rules_haskell/blob/master/tools/runfiles/README.md>
category: Build Tool
homepage: https://github.com/tweag/rules_haskell#readme
bug-reports: https://github.com/tweag/rules_haskell/issues
author: Tweag I/O Limited
maintainer: m@tweag.io
copyright: 2018 Tweag I/O Limited
license: Apache-2.0
license-file: LICENSE
build-type: Simple
cabal-version: >= 1.10
extra-source-files:
LICENSE
README.md
source-repository head
type: git
location: https://github.com/tweag/rules_haskell
library
exposed-modules:
Bazel.Runfiles
other-modules:
Paths_bazel_runfiles
hs-source-dirs:
src
build-depends:
base >=4.7 && <5
, directory
, filepath
default-language: Haskell2010
executable bazel-runfiles-exe
main-is: Bin.hs
other-modules:
Paths_bazel_runfiles
hs-source-dirs:
bin
ghc-options: -threaded -rtsopts -with-rtsopts=-N
build-depends:
base
, bazel-runfiles
, filepath
default-language: Haskell2010

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bar

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module Main (main) where
import qualified Bazel.Runfiles as Runfiles
import Control.Monad (when)
import System.FilePath ((</>))
main :: IO ()
main = do
r <- Runfiles.create
bar <- readFile (Runfiles.rlocation r "io_tweag_rules_haskell/tools/runfiles/bin-data.txt")
when (lines bar /= ["bar"]) -- ignore trailing newline
$ error $ "Incorrect contents: got: " ++ show bar

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third_party/bazel/rules_haskell/tools/runfiles/package.yaml vendored Normal file
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name: bazel-runfiles
version: 0.7.0.1
github: "tweag/rules_haskell"
license: Apache-2.0
author: "Tweag I/O Limited"
maintainer: "m@tweag.io"
copyright: "2018 Tweag I/O Limited"
extra-source-files:
- README.md
- LICENSE
synopsis: Locate Bazel runfiles location
category: Build Tool
# To avoid duplicated efforts in documentation and dealing with the
# complications of embedding Haddock markup inside cabal files, it is
# common to point users to the README.md file.
description: Please see the README on GitHub at <https://github.com/tweag/rules_haskell/blob/master/tools/runfiles/README.md>
dependencies:
- base >= 4.7 && < 5
library:
source-dirs: src
dependencies:
- directory
- filepath
exposed-modules:
- Bazel.Runfiles
executables:
bazel-runfiles-exe:
main: Bin.hs
source-dirs: bin
ghc-options:
- -threaded
- -rtsopts
- -with-rtsopts=-N
dependencies:
- base
- bazel-runfiles
- filepath

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third_party/bazel/rules_haskell/tools/runfiles/src/Bazel/Runfiles.hs vendored Normal file
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-- | This module enables finding data dependencies ("runfiles") of Haskell
-- binaries at runtime.
--
-- For more information, see: https://github.com/bazelbuild/bazel/issues/4460
--
-- Note: this does not currently support the RUNFILES_MANIFEST environmental
-- variable. However, that's only necessary on Windows, which rules_haskell
-- doesn't support yet.
--
-- Additionally, this is not yet supported by the REPL.
module Bazel.Runfiles
( Runfiles
, create
, rlocation
, env
) where
import System.Directory (doesDirectoryExist)
import System.Environment (getExecutablePath, lookupEnv)
import System.FilePath (FilePath, (</>), (<.>))
-- | A path to a directory tree containing runfiles for the given
newtype Runfiles = Runfiles FilePath
deriving Show
-- | Construct a path to a data dependency within the given runfiles.
--
-- For example: @rlocation \"myworkspace/mypackage/myfile.txt\"@
rlocation :: Runfiles -> FilePath -> FilePath
rlocation (Runfiles f) g = f </> g
-- | Set environmental variables for locating the given runfiles directory.
--
-- Note that Bazel will set these automatically when it runs tests
-- (@bazel test@). However, it will not automatically set them
-- during "bazel run"; thus, non-test binaries should set the
-- environment manually for processes that they call.
env :: Runfiles -> [(String, String)]
env (Runfiles f) = [(runfilesDirEnv, f)]
runfilesDirEnv :: String
runfilesDirEnv = "RUNFILES_DIR"
-- | Locate the runfiles directory for the current binary.
--
-- This behaves according to the specification in:
-- https://docs.google.com/document/d/e/2PACX-1vSDIrFnFvEYhKsCMdGdD40wZRBX3m3aZ5HhVj4CtHPmiXKDCxioTUbYsDydjKtFDAzER5eg7OjJWs3V/pub
--
-- Note: it does not currently support the @RUNFILES_MANIFEST@ environmental
-- variable. However, that's only necessary on Windows, which rules_haskell
-- doesn't support yet anyway.
create :: IO Runfiles
create = do
exeRunfilesPath <- fmap (<.> "runfiles") getExecutablePath
exeRunfilesExists <- doesDirectoryExist exeRunfilesPath
if exeRunfilesExists
then return $ Runfiles exeRunfilesPath
else do
envDir <- lookupEnv runfilesDirEnv
case envDir of
Just f -> return $ Runfiles f
Nothing -> error "Unable to locate runfiles directory"

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resolver: lts-12.16
packages:
- .

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foo

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module Main (main) where
import qualified Bazel.Runfiles as Runfiles
import Control.Monad (when)
import System.Process (callProcess)
main :: IO ()
main = do
r <- Runfiles.create
foo <- readFile (Runfiles.rlocation r "io_tweag_rules_haskell/tools/runfiles/test-data.txt")
when (lines foo /= ["foo"]) -- ignore trailing newline
$ error $ "Incorrect contents: got: " ++ show foo
callProcess (Runfiles.rlocation r "io_tweag_rules_haskell/tools/runfiles/bin") []