diff --git a/bundle/config/mutator/configure_wsfs.go b/bundle/config/mutator/configure_wsfs.go index 1d1bec58..110e1a38 100644 --- a/bundle/config/mutator/configure_wsfs.go +++ b/bundle/config/mutator/configure_wsfs.go @@ -5,14 +5,12 @@ import ( "strings" "github.com/databricks/cli/bundle" + "github.com/databricks/cli/libs/dbr" "github.com/databricks/cli/libs/diag" - "github.com/databricks/cli/libs/env" "github.com/databricks/cli/libs/filer" "github.com/databricks/cli/libs/vfs" ) -const envDatabricksRuntimeVersion = "DATABRICKS_RUNTIME_VERSION" - type configureWSFS struct{} func ConfigureWSFS() bundle.Mutator { @@ -32,7 +30,7 @@ func (m *configureWSFS) Apply(ctx context.Context, b *bundle.Bundle) diag.Diagno } // The executable must be running on DBR. - if _, ok := env.Lookup(ctx, envDatabricksRuntimeVersion); !ok { + if !dbr.RunsOnRuntime(ctx) { return nil } diff --git a/bundle/config/mutator/configure_wsfs_test.go b/bundle/config/mutator/configure_wsfs_test.go new file mode 100644 index 00000000..6f76293e --- /dev/null +++ b/bundle/config/mutator/configure_wsfs_test.go @@ -0,0 +1,65 @@ +package mutator_test + +import ( + "context" + "runtime" + "testing" + + "github.com/databricks/cli/bundle" + "github.com/databricks/cli/bundle/config/mutator" + "github.com/databricks/cli/libs/dbr" + "github.com/databricks/cli/libs/vfs" + "github.com/databricks/databricks-sdk-go/config" + "github.com/databricks/databricks-sdk-go/experimental/mocks" + "github.com/stretchr/testify/assert" +) + +func mockBundleForConfigureWSFS(t *testing.T, syncRootPath string) *bundle.Bundle { + // The native path of the sync root on Windows will never match the /Workspace prefix, + // so the test case for nominal behavior will always fail. + if runtime.GOOS == "windows" { + t.Skip("this test is not applicable on Windows") + } + + b := &bundle.Bundle{ + SyncRoot: vfs.MustNew(syncRootPath), + } + + w := mocks.NewMockWorkspaceClient(t) + w.WorkspaceClient.Config = &config.Config{} + b.SetWorkpaceClient(w.WorkspaceClient) + + return b +} + +func TestConfigureWSFS_SkipsIfNotWorkspacePrefix(t *testing.T) { + b := mockBundleForConfigureWSFS(t, "/foo") + originalSyncRoot := b.SyncRoot + + ctx := context.Background() + diags := bundle.Apply(ctx, b, mutator.ConfigureWSFS()) + assert.Empty(t, diags) + assert.Equal(t, originalSyncRoot, b.SyncRoot) +} + +func TestConfigureWSFS_SkipsIfNotRunningOnRuntime(t *testing.T) { + b := mockBundleForConfigureWSFS(t, "/Workspace/foo") + originalSyncRoot := b.SyncRoot + + ctx := context.Background() + ctx = dbr.MockRuntime(ctx, false) + diags := bundle.Apply(ctx, b, mutator.ConfigureWSFS()) + assert.Empty(t, diags) + assert.Equal(t, originalSyncRoot, b.SyncRoot) +} + +func TestConfigureWSFS_SwapSyncRoot(t *testing.T) { + b := mockBundleForConfigureWSFS(t, "/Workspace/foo") + originalSyncRoot := b.SyncRoot + + ctx := context.Background() + ctx = dbr.MockRuntime(ctx, true) + diags := bundle.Apply(ctx, b, mutator.ConfigureWSFS()) + assert.Empty(t, diags) + assert.NotEqual(t, originalSyncRoot, b.SyncRoot) +} diff --git a/cmd/root/root.go b/cmd/root/root.go index 7059586f..e6f66f12 100644 --- a/cmd/root/root.go +++ b/cmd/root/root.go @@ -11,6 +11,7 @@ import ( "github.com/databricks/cli/internal/build" "github.com/databricks/cli/libs/cmdio" + "github.com/databricks/cli/libs/dbr" "github.com/databricks/cli/libs/log" "github.com/spf13/cobra" ) @@ -73,6 +74,9 @@ func New(ctx context.Context) *cobra.Command { // get the context back ctx = cmd.Context() + // Detect if the CLI is running on DBR and store this on the context. + ctx = dbr.DetectRuntime(ctx) + // Configure our user agent with the command that's about to be executed. ctx = withCommandInUserAgent(ctx, cmd) ctx = withCommandExecIdInUserAgent(ctx) diff --git a/libs/dbr/context.go b/libs/dbr/context.go new file mode 100644 index 00000000..7512c0fe --- /dev/null +++ b/libs/dbr/context.go @@ -0,0 +1,49 @@ +package dbr + +import "context" + +// key is a package-local type to use for context keys. +// +// Using an unexported type for context keys prevents key collisions across +// packages since external packages cannot create values of this type. +type key int + +const ( + // dbrKey is the context key for the detection result. + // The value of 1 is arbitrary and can be any number. + // Other keys in the same package must have different values. + dbrKey = key(1) +) + +// DetectRuntime detects whether or not the current +// process is running inside a Databricks Runtime environment. +// It return a new context with the detection result set. +func DetectRuntime(ctx context.Context) context.Context { + if v := ctx.Value(dbrKey); v != nil { + panic("dbr.DetectRuntime called twice on the same context") + } + return context.WithValue(ctx, dbrKey, detect(ctx)) +} + +// MockRuntime is a helper function to mock the detection result. +// It returns a new context with the detection result set. +func MockRuntime(ctx context.Context, b bool) context.Context { + if v := ctx.Value(dbrKey); v != nil { + panic("dbr.MockRuntime called twice on the same context") + } + return context.WithValue(ctx, dbrKey, b) +} + +// RunsOnRuntime returns the detection result from the context. +// It expects a context returned by [DetectRuntime] or [MockRuntime]. +// +// We store this value in a context to avoid having to use either +// a global variable, passing a boolean around everywhere, or +// performing the same detection multiple times. +func RunsOnRuntime(ctx context.Context) bool { + v := ctx.Value(dbrKey) + if v == nil { + panic("dbr.RunsOnRuntime called without calling dbr.DetectRuntime first") + } + return v.(bool) +} diff --git a/libs/dbr/context_test.go b/libs/dbr/context_test.go new file mode 100644 index 00000000..fc53cf13 --- /dev/null +++ b/libs/dbr/context_test.go @@ -0,0 +1,59 @@ +package dbr + +import ( + "context" + "testing" + + "github.com/stretchr/testify/assert" +) + +func TestContext_DetectRuntimePanics(t *testing.T) { + ctx := context.Background() + + // Run detection. + ctx = DetectRuntime(ctx) + + // Expect a panic if the detection is run twice. + assert.Panics(t, func() { + ctx = DetectRuntime(ctx) + }) +} + +func TestContext_MockRuntimePanics(t *testing.T) { + ctx := context.Background() + + // Run detection. + ctx = MockRuntime(ctx, true) + + // Expect a panic if the mock function is run twice. + assert.Panics(t, func() { + MockRuntime(ctx, true) + }) +} + +func TestContext_RunsOnRuntimePanics(t *testing.T) { + ctx := context.Background() + + // Expect a panic if the detection is not run. + assert.Panics(t, func() { + RunsOnRuntime(ctx) + }) +} + +func TestContext_RunsOnRuntime(t *testing.T) { + ctx := context.Background() + + // Run detection. + ctx = DetectRuntime(ctx) + + // Expect no panic because detection has run. + assert.NotPanics(t, func() { + RunsOnRuntime(ctx) + }) +} + +func TestContext_RunsOnRuntimeWithMock(t *testing.T) { + ctx := context.Background() + assert.True(t, RunsOnRuntime(MockRuntime(ctx, true))) + assert.False(t, RunsOnRuntime(MockRuntime(ctx, false))) +} diff --git a/libs/dbr/detect.go b/libs/dbr/detect.go new file mode 100644 index 00000000..d8b4dfe2 --- /dev/null +++ b/libs/dbr/detect.go @@ -0,0 +1,35 @@ +package dbr + +import ( + "context" + "os" + "runtime" + + "github.com/databricks/cli/libs/env" +) + +// Dereference [os.Stat] to allow mocking in tests. +var statFunc = os.Stat + +// detect returns true if the current process is running on a Databricks Runtime. +// Its return value is meant to be cached in the context. +func detect(ctx context.Context) bool { + // Databricks Runtime implies Linux. + // Return early on other operating systems. + if runtime.GOOS != "linux" { + return false + } + + // Databricks Runtime always has the DATABRICKS_RUNTIME_VERSION environment variable set. + if value, ok := env.Lookup(ctx, "DATABRICKS_RUNTIME_VERSION"); !ok || value == "" { + return false + } + + // Expect to see a "/databricks" directory. + if fi, err := statFunc("/databricks"); err != nil || !fi.IsDir() { + return false + } + + // All checks passed. + return true +} diff --git a/libs/dbr/detect_test.go b/libs/dbr/detect_test.go new file mode 100644 index 00000000..3a4a43a7 --- /dev/null +++ b/libs/dbr/detect_test.go @@ -0,0 +1,83 @@ +package dbr + +import ( + "context" + "io/fs" + "runtime" + "testing" + + "github.com/databricks/cli/libs/env" + "github.com/databricks/cli/libs/fakefs" + "github.com/stretchr/testify/assert" +) + +func requireLinux(t *testing.T) { + if runtime.GOOS != "linux" { + t.Skipf("skipping test on %s", runtime.GOOS) + } +} + +func configureStatFunc(t *testing.T, fi fs.FileInfo, err error) { + originalFunc := statFunc + statFunc = func(name string) (fs.FileInfo, error) { + assert.Equal(t, "/databricks", name) + return fi, err + } + + t.Cleanup(func() { + statFunc = originalFunc + }) +} + +func TestDetect_NotLinux(t *testing.T) { + if runtime.GOOS == "linux" { + t.Skip("skipping test on Linux OS") + } + + ctx := context.Background() + assert.False(t, detect(ctx)) +} + +func TestDetect_Env(t *testing.T) { + requireLinux(t) + + // Configure other checks to pass. + configureStatFunc(t, fakefs.FileInfo{FakeDir: true}, nil) + + t.Run("empty", func(t *testing.T) { + ctx := env.Set(context.Background(), "DATABRICKS_RUNTIME_VERSION", "") + assert.False(t, detect(ctx)) + }) + + t.Run("non-empty cluster", func(t *testing.T) { + ctx := env.Set(context.Background(), "DATABRICKS_RUNTIME_VERSION", "15.4") + assert.True(t, detect(ctx)) + }) + + t.Run("non-empty serverless", func(t *testing.T) { + ctx := env.Set(context.Background(), "DATABRICKS_RUNTIME_VERSION", "client.1.13") + assert.True(t, detect(ctx)) + }) +} + +func TestDetect_Stat(t *testing.T) { + requireLinux(t) + + // Configure other checks to pass. + ctx := env.Set(context.Background(), "DATABRICKS_RUNTIME_VERSION", "non-empty") + + t.Run("error", func(t *testing.T) { + configureStatFunc(t, nil, fs.ErrNotExist) + assert.False(t, detect(ctx)) + }) + + t.Run("not a directory", func(t *testing.T) { + configureStatFunc(t, fakefs.FileInfo{}, nil) + assert.False(t, detect(ctx)) + }) + + t.Run("directory", func(t *testing.T) { + configureStatFunc(t, fakefs.FileInfo{FakeDir: true}, nil) + assert.True(t, detect(ctx)) + }) +} diff --git a/libs/fakefs/fakefs.go b/libs/fakefs/fakefs.go new file mode 100644 index 00000000..2f475697 --- /dev/null +++ b/libs/fakefs/fakefs.go @@ -0,0 +1,55 @@ +package fakefs + +import ( + "io/fs" + "time" +) + +// DirEntry is a fake implementation of [fs.DirEntry]. +type DirEntry struct { + FileInfo +} + +func (entry DirEntry) Type() fs.FileMode { + typ := fs.ModePerm + if entry.FakeDir { + typ |= fs.ModeDir + } + return typ +} + +func (entry DirEntry) Info() (fs.FileInfo, error) { + return entry.FileInfo, nil +} + +// FileInfo is a fake implementation of [fs.FileInfo]. +type FileInfo struct { + FakeName string + FakeSize int64 + FakeDir bool + FakeMode fs.FileMode +} + +func (info FileInfo) Name() string { + return info.FakeName +} + +func (info FileInfo) Size() int64 { + return info.FakeSize +} + +func (info FileInfo) Mode() fs.FileMode { + return info.FakeMode +} + +func (info FileInfo) ModTime() time.Time { + return time.Now() +} + +func (info FileInfo) IsDir() bool { + return info.FakeDir +} + +func (info FileInfo) Sys() any { + return nil +}