Use ghcopts instead of compiler_flags

docs/haskell.rst

@@ -239,7 +239,7 @@ a single ``BUILD.bazel`` as follows::
   haskell_binary(
       name = "demorgan",
       srcs = ["Main.hs"],
-      compiler_flags = ["-threaded"],
+      ghcopts = ["-threaded"],
       deps = [":base", ":booleans"],
   )
 
@@ -317,7 +317,7 @@ And at the ``main/BUILD.bazel`` file::
   haskell_binary(
       name = "demorgan",
       srcs = ["Main.hs"],
-      compiler_flags = ["-threaded"],
+      ghcopts = ["-threaded"],
       deps = [":base", "//lib:booleans"],
   )
 

rules_haskell_tests/tests/repl-flags/BUILD.bazel

@@ -13,8 +13,8 @@ haskell_test(
     name = "compiler_flags",
     srcs = ["CompilerFlags.hs"],
 
-    # This also ensure that local `compiler_flags` does not override the `global ones`
-    compiler_flags = ["-XOverloadedStrings"],
+    # This also ensure that local `ghcopts` does not override the `global ones`
+    ghcopts = ["-XOverloadedStrings"],
     visibility = ["//visibility:public"],
     deps = [
         "//tests/hackage:base",

rules_haskell_tests/tests/repl-make-variables/BUILD.bazel

@@ -4,13 +4,13 @@ package(default_testonly = 1)
 
 # Regression tests for https://github.com/tweag/rules_haskell/issues/1377
 
-# Test that make variable expension is performed on `compiler_flags` forwarded
+# Test that make variable expension is performed on `ghcopts` forwarded
 # to the REPL.
 haskell_test(
     name = "test-compiler-flags",
     srcs = ["Main.hs"],
-    compiler_flags = ['-DDATA="$(rootpath data.txt)"'],
     data = ["data.txt"],
+    ghcopts = ['-DDATA="$(rootpath data.txt)"'],
     visibility = ["//tests/asterius/repl-make-variables:__pkg__"],
     deps = [
         "//tests/hackage:base",

rules_haskell_tests/tests/sandwich/BUILD.bazel

@@ -15,7 +15,7 @@ cc_library(
 haskell_library(
     name = "testlib",
     srcs = ["Lib.hs"],
-    compiler_flags = [
+    ghcopts = [
         "-Wall",
         "-Werror",
     ],
@@ -28,7 +28,7 @@ haskell_library(
 haskell_test(
     name = "test",
     srcs = ["Main.hs"],
-    compiler_flags = [
+    ghcopts = [
         "-Wall",
         "-Werror",
     ],