enhance: add macOS VM executor backend

Replace the Tart-based prototype with a runner-oriented macOS VM
executor backed by runner-executor-macos and Apple Virtualization.

Assisted-by: Codet:MODEL_VERSION
This commit is contained in:
Lunny Xiao
2026-09-05 13:20:03 -07:00
parent 1745c7c841
commit 2db24c7401
18 changed files with 1167 additions and 15 deletions
+73
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// Copyright 2026 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package container
import (
"context"
"encoding/json"
"errors"
"fmt"
"os/exec"
"strings"
"time"
)
type macOSVM struct {
Name string `json:"name"`
State string `json:"state"`
Running bool `json:"running"`
AccessedAt string `json:"accessed_at"`
}
// CleanupOrphanMacOSVMs deletes local macOS VMs left behind by this runner that
// have not been accessed since cutoff.
func CleanupOrphanMacOSVMs(ctx context.Context, executorPath, uuid string, cutoff time.Time) error {
if uuid == "" {
return nil
}
output, err := exec.CommandContext(ctx, executorPath, "list", "--format", "json").Output()
if err != nil {
return fmt.Errorf("list macOS VMs: %w", err)
}
var vms []macOSVM
if err := json.Unmarshal(output, &vms); err != nil {
return fmt.Errorf("parse macOS VM list: %w", err)
}
var errs []error
for _, name := range macOSVMsToDelete(vms, uuid, cutoff) {
if err := exec.CommandContext(ctx, executorPath, "destroy", name).Run(); err != nil {
errs = append(errs, fmt.Errorf("destroy macOS VM %s: %w", name, err))
}
}
return errors.Join(errs...)
}
func macOSVMsToDelete(vms []macOSVM, uuid string, cutoff time.Time) []string {
prefix := "GITEA-MACOS-VM-" + uuid + "-"
var stale []string
for _, vm := range vms {
if vm.Running || !strings.HasPrefix(vm.Name, prefix) {
continue
}
accessed, err := parseMacOSVMTime(vm.AccessedAt)
if err != nil || accessed.After(cutoff) {
continue
}
stale = append(stale, vm.Name)
}
return stale
}
func parseMacOSVMTime(raw string) (time.Time, error) {
if raw == "" {
return time.Time{}, errors.New("empty access time")
}
if parsed, err := time.Parse(time.RFC3339Nano, raw); err == nil {
return parsed, nil
}
return time.Parse(time.RFC3339, raw)
}
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// Copyright 2026 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package container
import (
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestMacOSVMsToDelete(t *testing.T) {
cutoff := time.Date(2026, 9, 5, 10, 0, 0, 0, time.UTC)
vms := []macOSVM{
{Name: "GITEA-MACOS-VM-runner-1-stale", AccessedAt: "2026-09-04T10:00:00Z"},
{Name: "GITEA-MACOS-VM-runner-1-running", AccessedAt: "2026-09-04T10:00:00Z", Running: true},
{Name: "GITEA-MACOS-VM-runner-1-fresh", AccessedAt: "2026-09-05T11:00:00Z"},
{Name: "GITEA-MACOS-VM-runner-2-stale", AccessedAt: "2026-09-04T10:00:00Z"},
}
assert.Equal(t, []string{"GITEA-MACOS-VM-runner-1-stale"}, macOSVMsToDelete(vms, "runner-1", cutoff))
}
func TestParseMacOSVMTime(t *testing.T) {
parsed, err := parseMacOSVMTime("2026-09-05T10:00:00Z")
require.NoError(t, err)
assert.Equal(t, time.Date(2026, 9, 5, 10, 0, 0, 0, time.UTC), parsed)
parsed, err = parseMacOSVMTime("2026-09-05T10:00:00.123456789Z")
require.NoError(t, err)
assert.Equal(t, time.Date(2026, 9, 5, 10, 0, 0, 123456789, time.UTC), parsed)
_, err = parseMacOSVMTime("")
require.Error(t, err)
}
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// Copyright 2026 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package container
import (
"archive/tar"
"context"
"errors"
"fmt"
"io"
"maps"
"os/exec"
"path"
"path/filepath"
"runtime"
"slices"
"strconv"
"strings"
"time"
"gitea.com/gitea/runner/act/common"
"gitea.com/gitea/runner/act/filecollector"
"github.com/go-git/go-billy/v5/helper/polyfill"
"github.com/go-git/go-billy/v5/osfs"
"github.com/go-git/go-git/v5/plumbing/format/gitignore"
)
const (
defaultMacOSVMBootTimeout = 5 * time.Minute
macOSVMReadyPollInterval = 500 * time.Millisecond
macOSVMStopWaitTimeout = 10 * time.Second
)
// MacOSVMEnvironment runs workflow steps in an ephemeral macOS VM.
type MacOSVMEnvironment struct {
Path string // guest scratch directory
TmpDir string // guest temp directory
ToolCache string // guest tool cache directory
Workdir string // host-side workspace path
GuestWorkdir string // guest-side workspace path
ActPath string // guest act directory
Image string
VMName string
ExecutorPath string
CPU int
Memory int
BootTimeout time.Duration
Stdout io.Writer
Stderr io.Writer
executorPath string
running bool
runCmd *exec.Cmd
runDone chan struct{}
runErr error
}
// MacOSVMEnvironmentInput is the input for NewMacOSVMEnvironment.
type MacOSVMEnvironmentInput struct {
Path string
TmpDir string
ToolCache string
Workdir string
GuestWorkdir string
ActPath string
Image string
VMName string
ExecutorPath string
CPU int
Memory int
BootTimeout time.Duration
Stdout io.Writer
Stderr io.Writer
}
func NewMacOSVMEnvironment(input MacOSVMEnvironmentInput) (*MacOSVMEnvironment, error) {
if input.Image == "" {
return nil, errors.New("macOS VM image is required")
}
if input.VMName == "" {
return nil, errors.New("macOS VM name is required")
}
if input.BootTimeout <= 0 {
input.BootTimeout = defaultMacOSVMBootTimeout
}
if input.ExecutorPath == "" {
input.ExecutorPath = "runner-executor-macos"
}
return &MacOSVMEnvironment{
Path: input.Path,
TmpDir: input.TmpDir,
ToolCache: input.ToolCache,
Workdir: input.Workdir,
GuestWorkdir: input.GuestWorkdir,
ActPath: input.ActPath,
Image: input.Image,
VMName: input.VMName,
ExecutorPath: input.ExecutorPath,
CPU: input.CPU,
Memory: input.Memory,
BootTimeout: input.BootTimeout,
Stdout: input.Stdout,
Stderr: input.Stderr,
executorPath: input.ExecutorPath,
}, nil
}
var _ ExecutionsEnvironment = &MacOSVMEnvironment{}
func (e *MacOSVMEnvironment) Create(_, _ []string) common.Executor {
return func(ctx context.Context) error {
if common.Dryrun(ctx) {
return nil
}
// A previous run can leave the deterministic job VM behind. Destroy it first.
_ = e.runExecutor(ctx, nil, io.Discard, io.Discard, "destroy", e.VMName)
args := []string{"provision", e.Image, e.VMName}
if e.CPU > 0 {
args = append(args, "--cpu", strconv.Itoa(e.CPU))
}
if e.Memory > 0 {
args = append(args, "--memory", strconv.Itoa(e.Memory))
}
return e.runExecutor(ctx, nil, e.Stdout, e.Stderr, args...)
}
}
func (e *MacOSVMEnvironment) Copy(destPath string, files ...*FileEntry) common.Executor {
return func(ctx context.Context) error {
if common.Dryrun(ctx) {
return nil
}
for _, file := range files {
dest := path.Join(destPath, file.Name)
script := `mkdir -p "$1" && cat > "$2" && chmod "$3" "$2"`
mode := file.Mode
if mode == 0 {
mode = 0o644
}
args := []string{"exec", "--stdin", e.VMName, "/bin/sh", "-c", script, "sh", path.Dir(dest), dest, strconv.FormatInt(mode, 8)}
if err := e.runExecutor(ctx, strings.NewReader(file.Body), e.Stdout, e.Stderr, args...); err != nil {
return err
}
}
return nil
}
}
func (e *MacOSVMEnvironment) CopyDir(destPath, srcPath string, useGitIgnore bool) common.Executor {
return func(ctx context.Context) error {
if common.Dryrun(ctx) {
return nil
}
pipeReader, pipeWriter := io.Pipe()
writeDone := make(chan error, 1)
go func() {
err := e.writeTar(ctx, pipeWriter, srcPath, useGitIgnore)
_ = pipeWriter.CloseWithError(err)
writeDone <- err
}()
script := `mkdir -p "$1" && /usr/bin/tar -xf - -C "$1"`
cmdErr := e.runExecutor(ctx, pipeReader, e.Stdout, e.Stderr, "exec", "--stdin", e.VMName, "/bin/sh", "-c", script, "sh", destPath)
_ = pipeReader.Close()
writeErr := <-writeDone
return errors.Join(cmdErr, writeErr)
}
}
func (e *MacOSVMEnvironment) writeTar(ctx context.Context, writer io.Writer, srcPath string, useGitIgnore bool) error {
tarWriter := tar.NewWriter(writer)
defer tarWriter.Close()
srcPrefix := filepath.Dir(srcPath)
if !strings.HasSuffix(srcPrefix, string(filepath.Separator)) {
srcPrefix += string(filepath.Separator)
}
var ignorer gitignore.Matcher
if useGitIgnore {
patterns, err := gitignore.ReadPatterns(polyfill.New(osfs.New(srcPath)), nil)
if err != nil {
common.Logger(ctx).Debugf("Error loading .gitignore: %v", err)
}
ignorer = gitignore.NewMatcher(patterns)
}
collector := &filecollector.FileCollector{
Ignorer: ignorer,
SrcPath: srcPath,
SrcPrefix: srcPrefix,
Handler: &filecollector.TarCollector{TarWriter: tarWriter},
}
return filepath.Walk(srcPath, collector.CollectFiles(ctx, []string{}))
}
func (e *MacOSVMEnvironment) GetContainerArchive(ctx context.Context, srcPath string) (io.ReadCloser, error) {
if common.Dryrun(ctx) {
return nil, errors.New("DRYRUN is not supported in GetContainerArchive")
}
cmd := exec.CommandContext(ctx, e.executorPath, "exec", e.VMName, "/usr/bin/tar", "-cf", "-", srcPath)
stdout, err := cmd.StdoutPipe()
if err != nil {
return nil, err
}
cmd.Stderr = e.Stderr
if err := cmd.Start(); err != nil {
return nil, err
}
return &macOSVMArchiveReader{ReadCloser: stdout, cmd: cmd}, nil
}
type macOSVMArchiveReader struct {
io.ReadCloser
cmd *exec.Cmd
}
func (r *macOSVMArchiveReader) Close() error {
closeErr := r.ReadCloser.Close()
return errors.Join(closeErr, r.cmd.Wait())
}
func (e *MacOSVMEnvironment) Inspect(ctx context.Context) (*Info, error) {
if common.Dryrun(ctx) {
return &Info{Health: HealthNone, Ports: map[string]string{}}, nil
}
state := "exited"
if e.running {
state = StateRunning
}
return &Info{ID: e.VMName, State: state, Health: HealthNone, Ports: map[string]string{}}, nil
}
func (e *MacOSVMEnvironment) DumpLogs(context.Context) error {
return nil
}
func (e *MacOSVMEnvironment) Pull(forcePull bool) common.Executor {
return func(ctx context.Context) error {
if common.Dryrun(ctx) {
return nil
}
return nil
}
}
func (e *MacOSVMEnvironment) Start(bool) common.Executor {
return func(ctx context.Context) error {
if common.Dryrun(ctx) {
return nil
}
cmd := exec.Command(e.executorPath, "start", "--no-graphics", e.VMName)
cmd.Stdout = e.Stdout
cmd.Stderr = e.Stderr
if err := cmd.Start(); err != nil {
return err
}
e.runCmd = cmd
e.runDone = make(chan struct{})
go func() {
e.runErr = cmd.Wait()
close(e.runDone)
}()
e.running = true
return e.waitReady(ctx)
}
}
func (e *MacOSVMEnvironment) waitReady(ctx context.Context) error {
ctx, cancel := context.WithTimeout(ctx, e.BootTimeout)
defer cancel()
var lastErr error
for {
if err := e.runExecutor(ctx, nil, io.Discard, io.Discard, "exec", e.VMName, "/bin/true"); err == nil {
return nil
} else {
lastErr = err
}
select {
case <-ctx.Done():
return fmt.Errorf("macOS VM %s did not become ready: %w", e.VMName, lastErr)
case <-e.runDone:
if e.runErr != nil {
return fmt.Errorf("macOS VM start exited before the VM became ready: %w", e.runErr)
}
return errors.New("macOS VM start exited before the VM became ready")
case <-time.After(macOSVMReadyPollInterval):
}
}
}
func (e *MacOSVMEnvironment) Exec(command []string, env map[string]string, _, workdir string) common.Executor {
return func(ctx context.Context) error {
if common.Dryrun(ctx) {
return nil
}
err := e.runExecutor(ctx, nil, e.Stdout, e.Stderr, macOSVMExecArgs(e.VMName, command, env, e.resolveWorkdir(workdir))...)
if exitErr, ok := errors.AsType[*exec.ExitError](err); ok {
return ExitCodeError(exitErr.ExitCode())
}
return err
}
}
func macOSVMExecArgs(vmName string, command []string, env map[string]string, workdir string) []string {
args := []string{"exec", vmName, "/usr/bin/env"}
for _, key := range slices.Sorted(maps.Keys(env)) {
args = append(args, key+"="+env[key])
}
args = append(args, "/bin/sh", "-c", `cd "$1" && shift && exec "$@"`, "sh", workdir)
return append(args, command...)
}
func (e *MacOSVMEnvironment) resolveWorkdir(workdir string) string {
switch {
case workdir == "":
return e.GuestWorkdir
case strings.HasPrefix(workdir, "/"):
return workdir
default:
return path.Join(e.GuestWorkdir, workdir)
}
}
func (e *MacOSVMEnvironment) UpdateFromEnv(srcPath string, env *map[string]string) common.Executor {
return parseEnvFile(e, srcPath, env)
}
func (e *MacOSVMEnvironment) UpdateFromImageEnv(*map[string]string) common.Executor {
return func(context.Context) error {
return nil
}
}
func (e *MacOSVMEnvironment) Remove() common.Executor {
return func(ctx context.Context) error {
if common.Dryrun(ctx) {
return nil
}
cleanCtx, cancel := context.WithTimeout(context.WithoutCancel(ctx), time.Minute)
defer cancel()
if e.runCmd != nil && e.runDone != nil {
select {
case <-e.runDone:
default:
if err := e.runExecutor(cleanCtx, nil, e.Stdout, e.Stderr, "stop", e.VMName, "--timeout", "20"); err != nil {
common.Logger(ctx).Debugf("macOS VM stop failed for VM %s: %v", e.VMName, err)
}
select {
case <-e.runDone:
case <-time.After(macOSVMStopWaitTimeout):
if e.runCmd.Process != nil {
_ = e.runCmd.Process.Kill()
}
common.Logger(ctx).Warnf("timed out waiting for macOS VM start to exit for VM %s", e.VMName)
}
}
}
e.running = false
if err := e.runExecutor(cleanCtx, nil, e.Stdout, e.Stderr, "destroy", e.VMName); err != nil {
common.Logger(ctx).Warnf("failed to destroy macOS VM %s: %v", e.VMName, err)
}
return nil
}
}
func (e *MacOSVMEnvironment) Close() common.Executor {
return func(ctx context.Context) error {
if common.Dryrun(ctx) {
return nil
}
if e.runCmd != nil && e.runCmd.Process != nil {
_ = e.runCmd.Process.Kill()
}
e.runCmd = nil
return nil
}
}
func (e *MacOSVMEnvironment) ReplaceLogWriter(stdout, stderr io.Writer) (io.Writer, io.Writer) {
oldOut := e.Stdout
oldErr := e.Stderr
e.Stdout = stdout
e.Stderr = stderr
return oldOut, oldErr
}
func (e *MacOSVMEnvironment) ToContainerPath(hostPath string) string {
if filepath.Clean(hostPath) == filepath.Clean(e.Workdir) {
return e.GuestWorkdir
}
if rel, err := filepath.Rel(e.Workdir, hostPath); err == nil && rel != "." && rel != ".." && !strings.HasPrefix(rel, ".."+string(filepath.Separator)) {
return path.Join(e.GuestWorkdir, filepath.ToSlash(rel))
}
return filepath.ToSlash(hostPath)
}
func (e *MacOSVMEnvironment) GetActPath() string {
return e.ActPath
}
func (*MacOSVMEnvironment) GetPathVariableName() string {
return "PATH"
}
func (*MacOSVMEnvironment) DefaultPathVariable() string {
return "/usr/local/bin:/opt/homebrew/bin:/usr/bin:/bin:/usr/sbin:/sbin"
}
func (*MacOSVMEnvironment) JoinPathVariable(paths ...string) string {
return strings.Join(paths, ":")
}
func (e *MacOSVMEnvironment) GetRunnerContext(context.Context) map[string]any {
return map[string]any{
"os": "macOS",
"arch": goArchToActionArch(runtime.GOARCH),
"temp": e.TmpDir,
"tool_cache": e.ToolCache,
}
}
func (*MacOSVMEnvironment) IsEnvironmentCaseInsensitive() bool {
return false
}
func (e *MacOSVMEnvironment) runExecutor(ctx context.Context, stdin io.Reader, stdout, stderr io.Writer, args ...string) error {
if stdout == nil {
stdout = e.Stdout
}
if stderr == nil {
stderr = e.Stderr
}
cmd := exec.CommandContext(ctx, e.executorPath, args...)
cmd.Stdin = stdin
cmd.Stdout = stdout
cmd.Stderr = stderr
if err := cmd.Run(); err != nil {
return fmt.Errorf("macOS VM executor %s: %w", args[0], err)
}
return nil
}
@@ -0,0 +1,89 @@
//go:build macos_vm_integration
// Copyright 2026 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package container
import (
"archive/tar"
"bytes"
"context"
"fmt"
"io"
"os"
"os/exec"
"runtime"
"testing"
"time"
"github.com/stretchr/testify/require"
)
func TestMacOSVMEnvironmentIntegration(t *testing.T) {
if runtime.GOOS != "darwin" {
t.Skip("macOS VMs run on macOS")
}
if _, err := exec.LookPath("runner-executor-macos"); err != nil {
t.Skip("runner-executor-macos executable not found")
}
image := os.Getenv("MACOS_VM_TEST_IMAGE")
if image == "" {
t.Skip("set MACOS_VM_TEST_IMAGE to a macOS VM image to run this test")
}
ctx := context.Background()
vmName := fmt.Sprintf("gitea-runner-test-%d", time.Now().UnixNano())
env, err := NewMacOSVMEnvironment(MacOSVMEnvironmentInput{
Path: "/Users/admin/runner/scratch/" + vmName,
TmpDir: "/Users/admin/runner/scratch/" + vmName + "/tmp",
ToolCache: "/Users/admin/runner/scratch/" + vmName + "/tool_cache",
Workdir: t.TempDir(),
GuestWorkdir: "/Users/admin/runner/workspace/" + vmName,
ActPath: "/Users/admin/runner/scratch/" + vmName + "/act",
Image: image,
VMName: vmName,
ExecutorPath: "runner-executor-macos",
BootTimeout: 10 * time.Minute,
Stdout: io.Discard,
Stderr: io.Discard,
})
require.NoError(t, err)
t.Cleanup(func() {
_ = env.Remove()(context.Background())
})
require.NoError(t, env.Create(nil, nil)(ctx))
require.NoError(t, env.Start(false)(ctx))
require.NoError(t, env.Copy("/tmp", &FileEntry{
Name: "gitea-runner-macos.txt",
Mode: 0o644,
Body: "hello from macos-vm",
})(ctx))
archive, err := env.GetContainerArchive(ctx, "/tmp/gitea-runner-macos.txt")
require.NoError(t, err)
body := readFirstTarFile(t, archive)
require.NoError(t, archive.Close())
require.Equal(t, "hello from macos-vm", body)
var output bytes.Buffer
oldOut, oldErr := env.ReplaceLogWriter(&output, &output)
defer env.ReplaceLogWriter(oldOut, oldErr)
require.NoError(t, env.Exec([]string{"/usr/bin/uname", "-s"}, nil, "", "")(ctx))
require.Contains(t, output.String(), "Darwin")
require.NoError(t, env.Remove()(ctx))
}
func readFirstTarFile(t *testing.T, archive io.Reader) string {
t.Helper()
reader := tar.NewReader(archive)
header, err := reader.Next()
require.NoError(t, err)
require.Contains(t, header.Name, "gitea-runner-macos.txt")
body, err := io.ReadAll(reader)
require.NoError(t, err)
return string(body)
}
@@ -0,0 +1,91 @@
// Copyright 2026 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package container
import (
"context"
"io"
"runtime"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestNewMacOSVMEnvironment(t *testing.T) {
env, err := NewMacOSVMEnvironment(MacOSVMEnvironmentInput{
Image: "ghcr.io/cirruslabs/macos-sonoma-base:latest",
VMName: "job-vm",
})
require.NoError(t, err)
assert.Equal(t, "ghcr.io/cirruslabs/macos-sonoma-base:latest", env.Image)
assert.Equal(t, "job-vm", env.VMName)
assert.Equal(t, defaultMacOSVMBootTimeout, env.BootTimeout)
assert.Equal(t, "runner-executor-macos", env.executorPath)
_, err = NewMacOSVMEnvironment(MacOSVMEnvironmentInput{VMName: "job-vm"})
require.Error(t, err)
_, err = NewMacOSVMEnvironment(MacOSVMEnvironmentInput{Image: "macos"})
require.Error(t, err)
}
func TestMacOSVMExecArgs(t *testing.T) {
args := macOSVMExecArgs("vm", []string{"bash", "-c", "echo hi"}, map[string]string{"B": "two", "A": "one"}, "/Users/admin/work")
assert.Equal(t, []string{
"exec", "vm", "/usr/bin/env",
"A=one", "B=two",
"/bin/sh", "-c", `cd "$1" && shift && exec "$@"`, "sh", "/Users/admin/work",
"bash", "-c", "echo hi",
}, args)
args = macOSVMExecArgs("vm", []string{"true"}, nil, "")
assert.Equal(t, []string{
"exec", "vm", "/usr/bin/env",
"/bin/sh", "-c", `cd "$1" && shift && exec "$@"`, "sh", "",
"true",
}, args)
}
func TestMacOSVMEnvironmentResolveWorkdir(t *testing.T) {
env := &MacOSVMEnvironment{GuestWorkdir: "/Users/admin/work"}
assert.Equal(t, "/Users/admin/work", env.resolveWorkdir(""))
assert.Equal(t, "/Users/admin/work/sub", env.resolveWorkdir("sub"))
assert.Equal(t, "/tmp", env.resolveWorkdir("/tmp"))
}
func TestMacOSVMEnvironmentToContainerPath(t *testing.T) {
env := &MacOSVMEnvironment{Workdir: "/workspace/owner/repo", GuestWorkdir: "/Users/admin/work/owner/repo"}
assert.Equal(t, "/Users/admin/work/owner/repo", env.ToContainerPath("/workspace/owner/repo"))
assert.Equal(t, "/Users/admin/work/owner/repo/sub", env.ToContainerPath("/workspace/owner/repo/sub"))
assert.Equal(t, "/elsewhere", env.ToContainerPath("/elsewhere"))
}
func TestMacOSVMEnvironmentGetRunnerContext(t *testing.T) {
env := &MacOSVMEnvironment{
TmpDir: "/Users/admin/scratch/tmp",
ToolCache: "/Users/admin/scratch/tool_cache",
}
ctx := env.GetRunnerContext(context.Background())
assert.Equal(t, "macOS", ctx["os"])
assert.Equal(t, goArchToActionArch(runtime.GOARCH), ctx["arch"])
assert.Equal(t, "/Users/admin/scratch/tmp", ctx["temp"])
assert.Equal(t, "/Users/admin/scratch/tool_cache", ctx["tool_cache"])
}
func TestMacOSVMEnvironmentReplaceLogWriter(t *testing.T) {
oldOut := io.Discard
oldErr := io.Discard
env := &MacOSVMEnvironment{Stdout: oldOut, Stderr: oldErr}
newOut, newErr := env.ReplaceLogWriter(io.Discard, io.Discard)
assert.Equal(t, oldOut, newOut)
assert.Equal(t, oldErr, newErr)
}
func TestMacOSVMEnvironmentDefaultPathVariable(t *testing.T) {
env := &MacOSVMEnvironment{}
assert.Equal(t, "PATH", env.GetPathVariableName())
assert.Equal(t, "/usr/local/bin:/opt/homebrew/bin:/usr/bin:/bin:/usr/sbin:/sbin", env.DefaultPathVariable())
assert.Equal(t, "/a:/b", env.JoinPathVariable("/a", "/b"))
assert.False(t, env.IsEnvironmentCaseInsensitive())
}