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authorVincent Ambo <tazjin@google.com>2019-07-04T10·18+0100
committerVincent Ambo <tazjin@google.com>2019-07-04T10·18+0100
commitf723b8b878a3c4a4687b9e337a875500bebb39b1 (patch)
treee85204cf042c355e90cff61c111e7d8cd15df311 /third_party/bazel/rules_haskell/tools/runfiles/README.md
parent2eb1dc26e42ffbdc168f05ef744bd4b4f3e4c36f (diff)
feat(third_party/bazel): Check in rules_haskell from Tweag r/17
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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") []
+```