windows tests: move tests, get rid of wine-binfmt

This removes all other Bazel test commands, so all tests can be again
tested with `bazel test ...`.

Also, fixes linux-arm64 glibc tests. Until now they've worked only in
CI. Now they work everywhere I tried.

.build.yml

@@ -5,7 +5,7 @@ packages:
   - qemu-user-static
   - binfmt-support
   - moreutils
-  - wine-binfmt
+  - wine64
 sources:
   - https://git.sr.ht/~motiejus/bazel-zig-cc
 environment:

ci/test

@@ -1,13 +1,4 @@
 #!/bin/bash
-set -euo pipefail
+set -xeuo pipefail
 
 bazel test ...
-
-# Windows tests
-# Unfortunately wine-binfmt breaks within the bazel sandbox, so we disable it
-# to run this test.
-bazel test //test/c:winver_windows_amd64 \
-    --spawn_strategy=standalone
-# There is no no easy way to run windows_arm64 binaries on Linux, so we just
-# cross compile one for testing.
-bazel build //test/c:winver_windows_arm64

rules/platform.bzl

@@ -1,3 +1,10 @@
+def _vars_script(env, run_under, cmd):
+    ret = ["#!/bin/sh"]
+    for k, v in env.items():
+        ret += ['export {}="{}"'.format(k, v)]
+    ret += ['exec {} {} "$@"'.format(run_under, cmd)]
+    return "\n".join(ret) + "\n"  # trailing newline is easier on the eyes
+
 def _platform_transition_impl(settings, attr):
     _ignore = settings
     return {
@@ -17,16 +24,18 @@ def _platform_binary_impl(ctx):
 
     executable = None
     if source_info.files_to_run and source_info.files_to_run.executable:
+        command = _vars_script(ctx.attr.env, ctx.attr.run_under, source_info.files_to_run.executable.short_path)
         executable = ctx.actions.declare_file("{}_{}".format(ctx.file.src.basename, ctx.attr.platform))
-        ctx.actions.run_shell(
-            command = "cp {} {}".format(source_info.files_to_run.executable.path, executable.path),
-            inputs = [source_info.files_to_run.executable],
-            outputs = [executable],
+        ctx.actions.write(
+            output = executable,
+            content = command,
+            is_executable = True,
         )
 
     return [DefaultInfo(
-        files = depset(ctx.files.src),
         executable = executable,
+        files = depset([executable]),
+        runfiles = ctx.runfiles(files = ctx.files.src),
     )]
 
 _attrs = {
@@ -38,6 +47,12 @@ _attrs = {
     "platform": attr.string(
         doc = "The platform to build the target for.",
     ),
+    "run_under": attr.string(
+        doc = "wrapper executable",
+    ),
+    "env": attr.string_dict(
+        doc = "Environment variables for the test",
+    ),
     "_allowlist_function_transition": attr.label(
         default = "@bazel_tools//tools/allowlists/function_transition_allowlist",
     ),

test/c/BUILD

@@ -1,4 +1,4 @@
-load("@bazel-zig-cc//rules:platform.bzl", "platform_binary", "platform_test")
+load("@bazel-zig-cc//rules:platform.bzl", "platform_binary")
 
 cc_binary(
     name = "which_libc",
@@ -13,7 +13,9 @@ cc_binary(
         platform_binary(
             name = "which_libc_{}".format(name),
             src = "which_libc",
+            env = {"QEMU_LD_PREFIX": "/usr/aarch64-linux-gnu"} if is_arm64 else {},
             platform = platform,
+            run_under = "qemu-aarch64-static" if is_arm64 else "",
         ),
         sh_test(
             name = "test_libc_{}".format(name),
@@ -25,34 +27,12 @@ cc_binary(
             },
         ),
     )
-    for name, platform, want in [
-        ("linux_amd64_musl", "//libc_aware/platform:linux_amd64_musl", "non-glibc"),
-        ("linux_amd64_gnu.2.19", "//libc_aware/platform:linux_amd64_gnu.2.19", "glibc_2.19"),
-        ("linux_amd64_gnu.2.28", "//libc_aware/platform:linux_amd64_gnu.2.28", "glibc_2.28"),
-        ("linux_amd64_gnu.2.31", "//libc_aware/platform:linux_amd64_gnu.2.31", "glibc_2.31"),
-        ("linux_amd64", "//platform:linux_amd64", "glibc_2.19"),
-        ("linux_arm64", "//platform:linux_arm64", "glibc_2.28"),
+    for name, platform, want, is_arm64 in [
+        ("linux_amd64_musl", "//libc_aware/platform:linux_amd64_musl", "non-glibc", False),
+        ("linux_amd64_gnu.2.19", "//libc_aware/platform:linux_amd64_gnu.2.19", "glibc_2.19", False),
+        ("linux_amd64_gnu.2.28", "//libc_aware/platform:linux_amd64_gnu.2.28", "glibc_2.28", False),
+        ("linux_amd64_gnu.2.31", "//libc_aware/platform:linux_amd64_gnu.2.31", "glibc_2.31", False),
+        ("linux_amd64", "//platform:linux_amd64", "glibc_2.19", False),
+        ("linux_arm64", "//platform:linux_arm64", "glibc_2.28", True),
     ]
 ]
-
-cc_binary(
-    name = "winver",
-    srcs = ["main_winver.c"],
-    target_compatible_with = [
-        "@platforms//os:windows",
-    ],
-)
-
-platform_test(
-    name = "winver_windows_amd64",
-    src = "winver",
-    platform = "//platform:windows_amd64",
-    tags = ["manual"],
-)
-
-platform_binary(
-    name = "winver_windows_arm64",
-    src = "winver",
-    platform = "//platform:windows_arm64",
-    tags = ["manual"],
-)

test/c/test.sh

@@ -1,10 +1,11 @@
-#/bin/bash
+#!/bin/bash
 
 set -euo pipefail
 
+# shellcheck disable=SC2153
 want=$WANT
+# shellcheck disable=SC2153
 binary=$BINARY
-
 got=$($binary)
 
 if [[ "$got" != "$want" ]]; then

test/cgo/BUILD

@@ -41,12 +41,14 @@ go_binary(
     platform_test(
         name = "cgo_test_{}".format(name),
         src = "cgo_test",
+        env = {"QEMU_LD_PREFIX": "/usr/aarch64-linux-gnu"} if is_arm64 else {},
         platform = platform,
+        run_under = "qemu-aarch64-static" if is_arm64 else "",
     )
-    for name, platform in [
-        ("linux_amd64_musl", "//libc_aware/platform:linux_amd64_musl"),
-        ("linux_amd64_gnu.2.19", "//libc_aware/platform:linux_amd64_gnu.2.19"),
-        ("linux_arm64_musl", "//libc_aware/platform:linux_arm64_musl"),
-        ("linux_arm64_gnu.2.28", "//libc_aware/platform:linux_arm64_gnu.2.28"),
+    for name, platform, is_arm64 in [
+        ("linux_amd64_musl", "//libc_aware/platform:linux_amd64_musl", False),
+        ("linux_amd64_gnu.2.19", "//libc_aware/platform:linux_amd64_gnu.2.19", False),
+        ("linux_arm64_musl", "//libc_aware/platform:linux_arm64_musl", True),
+        ("linux_arm64_gnu.2.28", "//libc_aware/platform:linux_arm64_gnu.2.28", True),
     ]
 ]

test/windows/BUILD

@@ -0,0 +1,21 @@
+load("@bazel-zig-cc//rules:platform.bzl", "platform_binary", "platform_test")
+
+cc_binary(
+    name = "winver",
+    srcs = ["main.c"],
+    tags = ["manual"],
+)
+
+platform_test(
+    name = "winver_windows_amd64",
+    src = "winver",
+    platform = "//platform:windows_amd64",
+    run_under = "wine64-stable",
+    tags = ["no-sandbox"],
+)
+
+platform_binary(
+    name = "winver_windows_arm64",
+    src = "winver",
+    platform = "//platform:windows_arm64",
+)