Make nixpkgs GHC 9.6.x work

.github/workflows/workflow.yaml

@@ -50,13 +50,16 @@ jobs:
         ghc:
           - 9.2.8
           - 9.4.6
+          - 9.6.2
         exclude:
           - module: rules_haskell_nix
             bzlmod: false
           # TODO: in a MODULE.bazel file we declare version specific dependencies, would need to use stack snapshot json
           #       and stack config per GHC version
           - ghc: 9.4.6
             bzlmod: true
+          - ghc: 9.6.2
+            bzlmod: true
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4

haskell/cabal.bzl

@@ -289,6 +289,15 @@ def _prepare_cabal_inputs(
     ]
     extra_args = ["--flags=" + " ".join(flags)]
 
+    if hs.toolchain.is_darwin:
+        # assume `otool` and `install_name_tool` are available at the same location as `ar`
+        ar_bindir = paths.dirname(cc.tools.ar)
+
+        extra_args.append("--ghc-option=-pgmotool=" + paths.join(ar_bindir, "otool"))
+        extra_args.append("--ghc-option=-pgminstall_name_tool=" + paths.join(ar_bindir, "install_name_tool"))
+        extra_args.append("--haddock-option=--optghc=-pgmotool=" + paths.join(ar_bindir, "otool"))
+        extra_args.append("--haddock-option=--optghc=-pgminstall_name_tool=" + paths.join(ar_bindir, "install_name_tool"))
+
     ghc_version = [int(x) for x in hs.toolchain.version.split(".")]
     if dynamic_file:
         # See Note [No PIE when linking] in haskell/private/actions/link.bzl

haskell/experimental/private/module.bzl

@@ -302,6 +302,13 @@ def _build_haskell_module(
     args.add_all(hs.toolchain.ghcopts)
     args.add_all(user_ghcopts)
 
+    if hs.toolchain.is_darwin:
+        # assume `otool` and `install_name_tool` are available at the same location as `ar`
+        ar_bindir = paths.dirname(cc.tools.ar)
+
+        args.add(paths.join(ar_bindir, "otool"), format = "-pgmotool=%s")
+        args.add(paths.join(ar_bindir, "install_name_tool"), format = "-pgminstall_name_tool=%s")
+
     if plugins and not enable_th:
         # For #1681. These suppresses bogus warnings about missing libraries which
         # aren't really needed.

haskell/private/actions/compile.bzl

@@ -124,6 +124,15 @@ def _compilation_defaults(
     compile_flags += hs.toolchain.ghcopts
     compile_flags += user_compile_flags
 
+    if hs.toolchain.is_darwin:
+        # assume `otool` and `install_name_tool` are available at the same location as `ar`
+        ar_bindir = paths.dirname(cc.tools.ar)
+
+        compile_flags += [
+            "-pgmotool=" + paths.join(ar_bindir, "otool"),
+            "-pgminstall_name_tool=" + paths.join(ar_bindir, "install_name_tool"),
+        ]
+
     package_ids = []
     all_plugins = plugins + non_default_plugins
     for plugin in all_plugins:

haskell/private/actions/link.bzl

@@ -133,6 +133,14 @@ def link_binary(
     args.add_all(cc.linker_flags, format_each = "-optl%s")
     if with_profiling:
         args.add("-prof")
+
+    if hs.toolchain.is_darwin:
+        # assume `otool` and `install_name_tool` are available at the same location as `ar`
+        ar_bindir = paths.dirname(cc.tools.ar)
+
+        args.add(paths.join(ar_bindir, "otool"), format = "-pgmotool=%s")
+        args.add(paths.join(ar_bindir, "install_name_tool"), format = "-pgminstall_name_tool=%s")
+
     args.add_all(hs.toolchain.ghcopts)
     args.add_all(compiler_flags)
 
@@ -366,6 +374,14 @@ def link_library_dynamic(hs, cc, posix, dep_info, extra_srcs, object_files, my_p
     args = hs.actions.args()
     args.add_all(cc.linker_flags, format_each = "-optl%s")
     args.add_all(["-shared", "-dynamic"])
+
+    if hs.toolchain.is_darwin:
+        # assume `otool` and `install_name_tool` are available at the same location as `ar`
+        ar_bindir = paths.dirname(cc.tools.ar)
+
+        args.add(paths.join(ar_bindir, "otool"), format = "-pgmotool=%s")
+        args.add(paths.join(ar_bindir, "install_name_tool"), format = "-pgminstall_name_tool=%s")
+
     args.add_all(hs.toolchain.ghcopts)
     args.add_all(compiler_flags)
 

haskell/private/pkgdb_to_bzl.py

@@ -21,15 +21,43 @@
 if len(sys.argv) == 3:
     repo_dir = "external/" + sys.argv[1]
     topdir = sys.argv[2]
+
+    if os.path.exists(os.path.join(topdir, 'package.conf.d')):
+        package_conf_dir = os.path.join(topdir, 'package.conf.d')
+    elif os.path.exists(os.path.join(topdir, 'lib', 'package.conf.d')):
+        topdir = os.path.join(topdir, 'lib')
+        package_conf_dir = os.path.join(topdir, 'package.conf.d')
+    else:
+        sys.exit("could not find package.conf.d directory at {}".format(topdir))
+    repo_root = os.getcwd()
 else:
     sys.exit("Usage: pkgdb_to_bzl.py <REPO_NAME> <TOPDIR>")
 
+def resolve(path, pkgroot):
+    """Resolve references to ${pkgroot} with the given value, resolve $topdir with `topdir`"""
+    if path.find("${pkgroot}") != -1:
+        norm_path = os.path.normpath(path.strip("\"").replace("${pkgroot}", pkgroot))
+        if not os.path.isabs(norm_path) and norm_path.startswith('..'):
+            return resolve(path, os.path.realpath(pkgroot))
+        else:
+            return norm_path
+    elif path.startswith("$topdir"):
+        return os.path.normpath(path.replace("$topdir", topdir)).replace('\\', '/')
+    else:
+        return path
+
 def path_to_label(path, pkgroot):
     """Substitute one pkgroot for another relative one to obtain a label."""
     if path.find("${pkgroot}") != -1:
-        return os.path.normpath(path.strip("\"").replace("${pkgroot}", topdir)).replace('\\', '/')
+        # determine if the given path is inside the repository root
+        # if it is not, return None to signal it needs to be symlinked into the
+        # repository
+        norm_path = os.path.normpath(resolve(path, pkgroot))
+        relative_path = os.path.relpath(norm_path, start=repo_root)
+
+        return None if relative_path.startswith('..') else relative_path.replace('\\', '/')
 
-    topdir_relative_path = path.replace(pkgroot, "$topdir")
+    topdir_relative_path = path.replace(os.path.realpath(pkgroot), "$topdir")
     if topdir_relative_path.find("$topdir") != -1:
         return os.path.normpath(topdir_relative_path.replace("$topdir", topdir)).replace('\\', '/')
 
@@ -79,15 +107,17 @@ def hs_library_pattern(name, mode = "static", profiling = False):
 
 # Accumulate package id to package name mappings.
 pkg_id_map = []
-for conf in glob.glob(os.path.join(topdir, "package.conf.d", "*.conf")):
+
+# pkgroot is not part of .conf files. It's a computed value. It is
+# defined to be the directory enclosing the package database
+# directory.
+pkgroot = os.path.dirname(package_conf_dir)
+
+
+for conf in glob.glob(os.path.join(package_conf_dir, '*.conf')):
     with open(conf, 'r') as f:
         pkg = package_configuration.parse_package_configuration(f)
 
-    # pkgroot is not part of .conf files. It's a computed value. It is
-    # defined to be the directory enclosing the package database
-    # directory.
-    pkgroot = os.path.dirname(os.path.dirname(os.path.realpath(conf)))
-
     pkg_id_map.append((pkg.name, pkg.id))
 
     # Haddock handling
@@ -105,31 +135,45 @@ def hs_library_pattern(name, mode = "static", profiling = False):
     haddock_html = None
 
     if pkg.haddock_html:
-        haddock_html = path_to_label(pkg.haddock_html, pkgroot)
         # We check if the file exists because cabal will unconditionally
         # generate the database entry even if no haddock was generated.
-        if not haddock_html and os.path.exists(pkg.haddock_html):
-            haddock_html = os.path.join("haddock", "html", pkg.name)
-            output.append("#SYMLINK: {} {}".format(pkg.haddock_html, haddock_html))
+        resolved_haddock_html = resolve(pkg.haddock_html, pkgroot)
+
+        if not os.path.exists(resolved_haddock_html):
+            # try to resolve relative to the package.conf.d dir
+            # see https://gitlab.haskell.org/ghc/ghc/-/issues/23476
+            resolved_haddock_html = resolve(pkg.haddock_html, package_conf_dir)
+
+        if os.path.exists(resolved_haddock_html):
+            haddock_html = path_to_label(pkg.haddock_html, pkgroot)
+            if not haddock_html:
+                haddock_html = os.path.join("haddock", "html", pkg.name)
+                output.append("#SYMLINK: {} {}".format(resolved_haddock_html.replace('\\', '/'), haddock_html))
 
     # If there is many interfaces, we give them a number
     interface_id = 0
     haddock_interfaces = []
     for interface_path in pkg.haddock_interfaces:
-        interface = path_to_label(interface_path, pkgroot)
+        resolved_path = resolve(interface_path, pkgroot).replace('\\', '/')
+
+        if not os.path.exists(resolved_path):
+            # try to resolve relative to the package.conf.d dir
+            # see https://gitlab.haskell.org/ghc/ghc/-/issues/23476
+            resolved_path = resolve(interface_path, package_conf_dir)
 
         # We check if the file exists because cabal will unconditionally
         # generate the database entry even if no haddock was generated.
-        if not os.path.exists(interface or interface_path):
-            continue
+        if not os.path.exists(resolved_path): continue
+
+        interface = path_to_label(interface_path, pkgroot)
 
         if not interface:
             interface = os.path.join(
                 "haddock",
                 "interfaces",
                 pkg.name + "_" + str(interface_id) + ".haddock",
             )
-            output.append("#SYMLINK: {} {}".format(interface_path, interface))
+            output.append("#SYMLINK: {} {}".format(resolved_path, interface))
             interface_id += 1
         haddock_interfaces.append(interface)
 

rules_haskell_tests/tests/BUILD.bazel

@@ -248,9 +248,7 @@ rule_test(
             "haddock/testsZShaddockZShaddock-lib-b",
             "haddock/testsZShaddockZShaddock-lib-deep",
         ],
-    }[TEST_GHC_VERSION] + ([
-        "haddock/rts-1.0.2",
-    ] if is_windows else []),
+    }[TEST_GHC_VERSION],
     rule = "//tests/haddock",
 )
 

rules_haskell_tests/tests/RunTests.hs

@@ -10,6 +10,7 @@ import System.Directory (copyFile)
 import System.FilePath ((</>))
 import System.Info (os)
 import System.IO.Temp (withSystemTempDirectory)
+import System.Environment (lookupEnv)
 
 import qualified System.Process as Process
 import Test.Hspec.Core.Spec (SpecM)
@@ -26,11 +27,15 @@ main = hspec $ do
     assertSuccess (bazel ["test", "//..."])
 
   it "bazel test prof" $ do
+    ghcVersion <- lookupEnv "GHC_VERSION"
+
     -- In .github/workflows/workflow.yaml we specify --test_tag_filters
     -- -dont_test_on_darwin. However, specifiying --test_tag_filters
     -- -requires_dynamic here alone would override that filter. So,
     -- we have to duplicate that filter here.
-    let tagFilter | os == "darwin" = "-dont_test_on_darwin,-requires_dynamic,-skip_profiling"
+    let tagFilter | os == "darwin" = "-dont_test_on_darwin,-requires_dynamic,-skip_profiling" ++ (
+                      -- skip tests for specific GHC version, see https://github.com/tweag/rules_haskell/issues/2073
+                      maybe "" (",-dont_build_on_macos_with_ghc_" ++) ghcVersion)
                   | otherwise      = "-requires_dynamic,-skip_profiling"
     assertSuccess (bazel ["test", "-c", "dbg", "//...", "--build_tag_filters", tagFilter, "--test_tag_filters", tagFilter])
 

rules_haskell_tests/tests/haskell_module/dep-narrowing-th/BUILD.bazel

@@ -94,6 +94,11 @@ haskell_library(
     narrowed_deps = [
         ":TestLib2",
     ],
+    tags = [
+        # skip building this target on macos with GHC 9.6.2 since it crashes ghc-iserv
+        # see https://github.com/tweag/rules_haskell/issues/2073
+        "dont_build_on_macos_with_ghc_9.6.2",
+    ],
     deps = [
         ":NonModulesTestLib",
         ":TestLib",
@@ -113,6 +118,11 @@ haskell_test(
     name = "Test",
     modules = [":TestBinModule"],
     narrowed_deps = [":lib"],
+    tags = [
+        # skip testing this target on macos with GHC 9.6.2 since it crashes ghc-iserv
+        # see https://github.com/tweag/rules_haskell/issues/2073
+        "dont_build_on_macos_with_ghc_9.6.2",
+    ],
     visibility = ["//visibility:public"],
     deps = [
         "//tests/hackage:base",