feat: make Virtualization Framework default (#956)

README.md

@@ -150,16 +150,24 @@ creds_helpers:
 additional_directories:
   # the path of each additional directory.
   - path: /Volumes
-# vmType (Experimental): sets which Hypervisor to use to launch the VM. (optional)
+# vmType: sets which Hypervisor to use to launch the VM. (optional)
 # Only takes effect when a new VM is launched (only on vm init).
 # One of: "qemu", "vz".
-#   - "qemu" (default): Uses QEMU as the Hypervisor.
-#   - "vz": Uses Virtualization.framework as the Hypervisor.
-vmType: "qemu"
-# rosetta (Experimental): sets whether to enable Rosetta as the binfmt_misc handler inside the VM. (optional)
+#   - "qemu": Uses QEMU as the Hypervisor.
+#   - "vz" (default): Uses Virtualization.framework as the Hypervisor.
+#
+# NOTE: prior to version 1.2.0, "qemu" was the default, and it will still be the default for
+# macOS versions that do not support Virtualization.framework (pre-13.0.0).
+vmType: "vz"
+# rosetta: sets whether to enable Rosetta as the binfmt_misc handler for x86_64 
+# binaries inside the VM, as an alternative to qemu user mode emulation. (optional)
 # Only takes effect when a new VM is launched (only on vm init).
 # Only available when using vmType "vz" on Apple Silicon running macOS 13+.
 # If true, also sets vmType to "vz".
+#
+# NOTE: while Rosetta is generally faster than qemu user mode emulation, it causes
+# some performance regressions, as noted in this issue:
+# https://github.com/lima-vm/lima/issues/1269
 rosetta: false
 ```
 

cmd/finch/main.go

@@ -56,12 +56,29 @@ func xmain(logger flog.Logger,
 	if err != nil {
 		return fmt.Errorf("failed to get finch root path: %w", err)
 	}
-	fc, err := config.Load(fs, fp.ConfigFilePath(finchRootPath), logger, loadCfgDeps, mem)
+	ecc := command.NewExecCmdCreator()
+	fc, err := config.Load(
+		fs,
+		fp.ConfigFilePath(finchRootPath),
+		logger,
+		loadCfgDeps,
+		mem,
+		ecc,
+	)
 	if err != nil {
 		return fmt.Errorf("failed to load config: %w", err)
 	}
 
-	return newApp(logger, fp, fs, fc, stdOut, home, finchRootPath).Execute()
+	return newApp(
+		logger,
+		fp,
+		fs,
+		fc,
+		stdOut,
+		home,
+		finchRootPath,
+		ecc,
+	).Execute()
 }
 
 var newApp = func(
@@ -72,6 +89,7 @@ var newApp = func(
 	stdOut io.Writer,
 	home,
 	finchRootPath string,
+	ecc command.Creator,
 ) *cobra.Command {
 	usage := fmt.Sprintf("%v <command>", finchRootCmd)
 	rootCmd := &cobra.Command{
@@ -93,7 +111,6 @@ var newApp = func(
 		return nil
 	}
 
-	ecc := command.NewExecCmdCreator()
 	lcc := command.NewLimaCmdCreator(ecc,
 		logger,
 		fp.LimaHomePath(),
@@ -129,7 +146,7 @@ var newApp = func(
 
 func initializeNerdctlCommands(
 	lcc command.LimaCmdCreator,
-	ecc *command.ExecCmdCreator,
+	ecc command.Creator,
 	logger flog.Logger,
 	fs afero.Fs,
 	fc *config.Finch,

cmd/finch/main_darwin.go

@@ -19,7 +19,7 @@ import (
 )
 
 func dependencies(
-	ecc *command.ExecCmdCreator,
+	ecc command.Creator,
 	fc *config.Finch,
 	fp path.Finch,
 	fs afero.Fs,

cmd/finch/main_test.go

@@ -193,10 +193,11 @@ func TestNewApp(t *testing.T) {
 	fp := path.Finch("")
 	fs := afero.NewMemMapFs()
 	stdOut := os.Stdout
+	ecc := mocks.NewCommandCreator(ctrl)
 
 	require.NoError(t, afero.WriteFile(fs, "/real/config.yaml", []byte(configStr), 0o600))
 
-	cmd := newApp(l, fp, fs, &config.Finch{}, stdOut, "", "")
+	cmd := newApp(l, fp, fs, &config.Finch{}, stdOut, "", "", ecc)
 
 	assert.Equal(t, cmd.Name(), finchRootCmd)
 	assert.Equal(t, cmd.Version, version.Version)

cmd/finch/main_windows.go

@@ -20,7 +20,7 @@ import (
 )
 
 func dependencies(
-	ecc *command.ExecCmdCreator,
+	ecc command.Creator,
 	fc *config.Finch,
 	fp path.Finch,
 	fs afero.Fs,

cmd/finch/virtual_machine.go

@@ -100,7 +100,7 @@ func virtualMachineCommands(
 	logger flog.Logger,
 	fp path.Finch,
 	lcc command.LimaCmdCreator,
-	ecc *command.ExecCmdCreator,
+	ecc command.Creator,
 	fs afero.Fs,
 	fc *config.Finch,
 	home string,

e2e/vm/virtualization_framework_rosetta_darwin_test.go

@@ -18,20 +18,20 @@ import (
 	"github.com/runfinch/finch/pkg/config"
 )
 
-var testVirtualizationFrameworkAndRosetta = func(o *option.Option, installed bool) {
-	ginkgo.Describe("Virtualization framework", ginkgo.Ordered, func() {
+var testNonDefaultOptions = func(o *option.Option, installed bool) {
+	ginkgo.Describe("Non-default options", ginkgo.Ordered, func() {
 		supportsVz, supportsVzErr := config.SupportsVirtualizationFramework(finch_cmd.NewExecCmdCreator())
 		gomega.Expect(supportsVzErr).ShouldNot(gomega.HaveOccurred())
 
-		ginkgo.Describe("Virtualization framework", ginkgo.Ordered, func() {
+		ginkgo.Describe("QEMU", ginkgo.Ordered, func() {
 			ginkgo.BeforeAll(func() {
 				if !supportsVz {
-					ginkgo.Skip("Skipping because system does not support Virtualization.framework")
+					ginkgo.Skip("Skipping because default for this system is already QEMU")
 				}
 
 				resetVM(o)
 				resetDisks(o, installed)
-				writeFile(finchConfigFilePath, []byte("memory: 4GiB\ncpus: 6\nvmType: vz\nrosetta: false"))
+				writeFile(finchConfigFilePath, []byte("memory: 4GiB\ncpus: 6\nvmType: qemu\nrosetta: false"))
 				// vm init with VZ set sometimes takes 2 minutes just to convert the disk to raw
 				command.New(o, virtualMachineRootCmd, "init").WithoutCheckingExitCode().WithTimeoutInSeconds(240).Run()
 				tests.SetupLocalRegistry(o)
@@ -46,7 +46,7 @@ var testVirtualizationFrameworkAndRosetta = func(o *option.Option, installed boo
 			tests.Port(o)
 		})
 
-		ginkgo.Describe("Virtualization framework and Rosetta", ginkgo.Ordered, func() {
+		ginkgo.Describe("Virtualization framework with Rosetta", ginkgo.Ordered, func() {
 			ginkgo.BeforeAll(func() {
 				if !supportsVz || runtime.GOOS != "darwin" || runtime.GOARCH != "arm64" {
 					ginkgo.Skip("Skipping because system does not support Rosetta")

e2e/vm/vm_darwin_test.go

@@ -66,7 +66,7 @@ func TestVM(t *testing.T) {
 		testConfig(o, *e2e.Installed)
 		testFinchConfigFile(o)
 		testVersion(o)
-		testVirtualizationFrameworkAndRosetta(o, *e2e.Installed)
+		testNonDefaultOptions(o, *e2e.Installed)
 		testSupportBundle(o)
 		testCredHelper(o, *e2e.Installed, *e2e.Registry)
 		testSoci(o, *e2e.Installed)

pkg/config/config.go

@@ -18,6 +18,7 @@ import (
 	"github.com/spf13/afero"
 	"gopkg.in/yaml.v3"
 
+	"github.com/runfinch/finch/pkg/command"
 	"github.com/runfinch/finch/pkg/flog"
 	"github.com/runfinch/finch/pkg/fmemory"
 	"github.com/runfinch/finch/pkg/system"
@@ -135,12 +136,19 @@ func ensureConfigDir(fs afero.Fs, path string, log flog.Logger) error {
 }
 
 // Load loads Finch's configuration from a YAML file and initializes default values.
-func Load(fs afero.Fs, cfgPath string, log flog.Logger, systemDeps LoadSystemDeps, mem fmemory.Memory) (*Finch, error) {
+func Load(
+	fs afero.Fs,
+	cfgPath string,
+	log flog.Logger,
+	systemDeps LoadSystemDeps,
+	mem fmemory.Memory,
+	ecc command.Creator,
+) (*Finch, error) {
 	b, err := afero.ReadFile(fs, cfgPath)
 	if err != nil {
 		if errors.Is(err, afero.ErrFileNotFound) {
 			log.Infof("Using default values due to missing config file at %q", cfgPath)
-			defCfg := applyDefaults(&Finch{}, systemDeps, mem)
+			defCfg := applyDefaults(&Finch{}, systemDeps, mem, ecc)
 			if err := ensureConfigDir(fs, filepath.Dir(cfgPath), log); err != nil {
 				return nil, fmt.Errorf("failed to ensure %q directory: %w", cfgPath, err)
 			}
@@ -157,7 +165,7 @@ func Load(fs afero.Fs, cfgPath string, log flog.Logger, systemDeps LoadSystemDep
 		return nil, fmt.Errorf("failed to unmarshal config file: %w", err)
 	}
 
-	defCfg := applyDefaults(&cfg, systemDeps, mem)
+	defCfg := applyDefaults(&cfg, systemDeps, mem, ecc)
 	if err := writeConfig(defCfg, fs, cfgPath); err != nil {
 		return nil, err
 	}