replace buildkite with github actions

Thus we gain Windows and MacOS hosts.

.github/workflows/ci.yaml

@@ -0,0 +1,62 @@
+---
+name: ci
+on:
+  push:
+  pull_request:
+defaults:
+  run:
+    shell: bash
+concurrency:
+  # Cancels pending runs when a PR gets updated.
+  group: ${{ github.head_ref || github.run_id }}-${{ github.actor }}
+  cancel-in-progress: true
+jobs:
+
+  build-and-test:
+    strategy:
+      matrix:
+        os: [windows-latest, ubuntu-latest, macos-13, macos-14]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          fetch-tags: true
+      - uses: actions/cache@v4
+        name: cache bazelisk and zig-cache directories
+        with:
+          key: cache-${{ runner.os }}-${{ hashFiles('.bazelversion', 'toolchain/private/zig_sdk.bzl', '.github/workflows/ci.yaml') }}
+          path: |
+            ${{ runner.os == 'Windows' && 'C:\Temp\hermetic_cc_toolchain' || '/tmp/zig-cache' }}
+            ${{ runner.os == 'Windows' && '~\AppData\Local\bazelisk' || '~/.cache/bazelisk' }}
+
+      - run: brew install bash
+        if: runner.os == 'macOS'
+
+      # Linux, macOS and Windows
+      - run: ci/list_toolchains_platforms
+      - run: ci/zig-utils
+
+      # Linux and macOS
+      - run: ci/release
+        if: runner.os == 'Linux' || runner.os == 'macOS'
+      - run: ci/lint
+        if: runner.os == 'Linux' || runner.os == 'macOS'
+      # TODO: releaser is broken on windows
+      - run: ci/prepare_git && ci/test_example rules_cc override_repository
+        if: runner.os == 'Linux' || runner.os == 'macOS'
+
+      # Linux and Windows
+      - run: tools/bazel build --config=darwin_toolchains //...
+        if: runner.os == 'Linux' || runner.os == 'Windows'
+
+      # Linux
+      - run: ci/test --config=darwin_toolchains
+        if: runner.os == 'Linux'
+      # TODO windows: broken releaser. MacOS: cgo.
+      - run: ci/prepare_git && ci/test_example bzlmod override_module
+        if: runner.os == 'Linux'
+
+      # macOS
+      - run: tools/bazel build --config=darwin_toolchains --build_tag_filters=darwin_c //...
+        if: runner.os == 'macOS'

ci/zig-utils

@@ -1,43 +1,10 @@
 #!/usr/bin/env bash
 
-# Copyright 2023 Uber Technologies, Inc.
-# Licensed under the MIT License
-
 set -xeuo pipefail
 
 echo "--- which zig"
 ZIG=${ZIG:-$(tools/bazel run "$@" --run_under=echo @zig_sdk//:zig)}
 
 for zigfile in $(git ls-files '*.zig'); do
-    echo "--- compile $zigfile for various architectures"
-    for target in \
-        aarch64-linux-gnu.2.28 \
-        aarch64-macos-none \
-        x86_64-linux-gnu.2.28 \
-        x86_64-macos-none \
-        x86_64-windows-gnu
-    do
-        if [[ $target == aarch64-macos-none ]]; then
-            mcpu=apple_a14
-        else
-            mcpu=baseline
-        fi
-        $ZIG build-exe -fno-emit-bin -target $target -mcpu=$mcpu "$zigfile"
-    done
-
-
-    # until hermetic_cc_toolchain gets a zig toolchain, run zig programs' unit tests here.
-    echo "--- zig test $zigfile"
-    $ZIG test "$zigfile"
-
-    # as of 2023-10 yours truly (@motiejus) was not able to install wine64
-    # on CI. See the commit message for details.
-    if [[ -z "${HERMETIC_CC_TOOLCHAIN_SKIP_WINE:-}" ]]; then
-        echo "--- test $zigfile via wine64"
-        $ZIG test \
-            -target x86_64-windows-gnu \
-            --test-cmd wine64-stable \
-            --test-cmd-bin \
-            "$zigfile"
-    fi
+  $ZIG test "$zigfile"
 done

test/gorace/BUILD

@@ -9,6 +9,11 @@ go_library(
     # keep
     cgo = True,
     importpath = "github.com/uber/hermetic_cc_toolchain/test/gorace",
+    # TODO lld-link: error: undefined symbol: WaitOnAddress on Windows
+    target_compatible_with = [
+        "@platforms//os:linux",
+        "@platforms//os:macos",
+    ],
     visibility = ["//visibility:private"],
 )