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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/tests/ghc/ghc.bzl
parent2eb1dc26e42ffbdc168f05ef744bd4b4f3e4c36f (diff)
feat(third_party/bazel): Check in rules_haskell from Tweag r/17
Diffstat (limited to 'third_party/bazel/rules_haskell/tests/ghc/ghc.bzl')
-rw-r--r--third_party/bazel/rules_haskell/tests/ghc/ghc.bzl19
1 files changed, 19 insertions, 0 deletions
diff --git a/third_party/bazel/rules_haskell/tests/ghc/ghc.bzl b/third_party/bazel/rules_haskell/tests/ghc/ghc.bzl
new file mode 100644
index 000000000000..443f04e7be63
--- /dev/null
+++ b/third_party/bazel/rules_haskell/tests/ghc/ghc.bzl
@@ -0,0 +1,19 @@
+"""Runs ghc --help"""
+
+hs_toolchain = "@io_tweag_rules_haskell//haskell:toolchain"
+
+def _impl(ctx):
+    output = ctx.outputs.out
+    ghc = ctx.toolchains[hs_toolchain].tools.ghc
+    ctx.actions.run_shell(
+        inputs = [ghc],
+        outputs = [output],
+        progress_message = "Printing ghc help message",
+        command = "%s --help > %s" % (ghc.path, output.path),
+    )
+
+ghc_help = rule(
+    implementation = _impl,
+    outputs = {"out": "out_file"},
+    toolchains = [hs_toolchain],
+)