1 files changed, 112 insertions, 0 deletions
diff --git a/third_party/bazel/rules_haskell/tests/library-linkstatic-flag/BUILD.bazel b/third_party/bazel/rules_haskell/tests/library-linkstatic-flag/BUILD.bazel
new file mode 100644
index 0000000000..0b7cae3d7a
--- /dev/null
+++ b/third_party/bazel/rules_haskell/tests/library-linkstatic-flag/BUILD.bazel
@@ -0,0 +1,112 @@
+load(
+    "@io_tweag_rules_haskell//haskell:haskell.bzl",
+    "haskell_library",
+)
+load("//tests:inline_tests.bzl", "sh_inline_test")
+load(":get_library_files.bzl", "get_libraries_as_runfiles")
+
+# test whether `linkstatic` works as expected
+package(default_testonly = 1)
+
+# only .a files
+haskell_library(
+    name = "library-static-only",
+    srcs = ["Lib.hs"],
+    linkstatic = True,  # <--
+    visibility = ["//visibility:public"],
+    deps = [
+        "//tests/hackage:base",
+        "//tests/hackage:bytestring",
+    ],
+)
+
+# both .a and .so files
+haskell_library(
+    name = "library-static-and-dynamic",
+    srcs = ["Lib.hs"],
+    linkstatic = False,  # <--
+    visibility = ["//visibility:public"],
+    deps = [
+        "//tests/hackage:base",
+        "//tests/hackage:bytestring",
+    ],
+)
+
+# extract all libraries from the haskell_library
+get_libraries_as_runfiles(
+    name = "library-static-only-libraries",
+    library = ":library-static-only",
+)
+
+get_libraries_as_runfiles(
+    name = "library-static-and-dynamic-libraries",
+    library = ":library-static-and-dynamic",
+)
+
+# sh_test’s `data` doesn’t add stuff to runfiles :(
+# sh_library can bundle different targets as runfiles for sh_test
+# TODO(Profpatsch): add functionality to sh_inline_test by default?
+sh_library(
+    name = "bundled-dependency-files-static-only",
+    data = [":library-static-only-libraries"],
+)
+
+sh_library(
+    name = "bundled-dependency-files-static-and-dynamic",
+    data = [":library-static-and-dynamic-libraries"],
+)
+
+# ensure that linkstatic=True only creates only .a, no .so
+sh_inline_test(
+    name = "library-linkstatic-flag",
+    size = "small",
+    # pass the file names as arguments
+    args = ["$(rootpaths :library-static-only-libraries)"],
+    data = [
+        # for rootpaths
+        ":library-static-only-libraries",
+        # to actually get the files …
+        ":bundled-dependency-files-static-only",
+    ],
+    script = """
+set -euo pipefail
+for f in "$@"; do
+    if ! [[ "$f" =~ .a$ ]]; then
+      echo "not a static library: $f"
+      exit 1
+    fi
+done
+""",
+)
+
+# test whether .so is linked dynamically and .a statically
+sh_inline_test(
+    name = "test-libraries-static-and-dynamic",
+    size = "small",
+    # pass the file names as arguments
+    args = ["$(rootpaths :library-static-and-dynamic-libraries)"],
+    data = [
+        # for rootpaths
+        ":library-static-and-dynamic-libraries",
+        # to actually get the files …
+        ":bundled-dependency-files-static-and-dynamic",
+    ],
+    script = """
+set -euo pipefail
+is_dynamic () {
+    # taken from https://github.com/NixOS/nixpkgs/blob/0b3f50f844e2a6b507b18d7c5259bb850b382f87/pkgs/build-support/setup-hooks/auto-patchelf.sh#L167-L170
+    readelf -l -- "$1" | grep -q "^ *INTERP\\>"
+}
+
+for f in "$@"; do
+    if [[ "$f" =~ .a$ ]] && is_dynamic "$f"; then
+        echo "should be a static executable: $f"
+        exit 1
+    fi
+    if [[ "$f" =~ .so$ ]] && ! is_dynamic "$f"; then
+        echo "should be a dynamic executable: $f"
+        exit 1
+    fi
+done
+""",
+)