Add initial distributor CLI skeleton

internal/app/app.go

@@ -0,0 +1,14 @@
+package app
+
+import "errors"
+
+const Name = "distributor"
+
+// Version can be replaced at build time with -ldflags "-X .../internal/app.Version=<value>".
+var Version = "dev"
+
+var ErrNotImplemented = errors.New("not implemented")
+
+func VersionString() string {
+	return Name + " " + Version
+}

internal/app/app_test.go

@@ -0,0 +1,16 @@
+package app
+
+import "testing"
+
+func TestVersionString(t *testing.T) {
+	oldVersion := Version
+	t.Cleanup(func() {
+		Version = oldVersion
+	})
+
+	Version = "1.2.3"
+
+	if got, want := VersionString(), "distributor 1.2.3"; got != want {
+		t.Fatalf("VersionString() = %q, want %q", got, want)
+	}
+}

internal/app/inspect.go

@@ -0,0 +1,14 @@
+package app
+
+import (
+	"context"
+	"fmt"
+)
+
+type InspectOptions struct {
+	Path string
+}
+
+func Inspect(context.Context, InspectOptions) error {
+	return fmt.Errorf("inspect command: %w", ErrNotImplemented)
+}

internal/app/pipeline.go

@@ -0,0 +1,5 @@
+package app
+
+type Pipeline struct {
+	ID string
+}

internal/app/run.go

@@ -0,0 +1,12 @@
+package app
+
+import (
+	"context"
+	"fmt"
+)
+
+type RunOptions struct{}
+
+func Run(context.Context, RunOptions) error {
+	return fmt.Errorf("run command: %w", ErrNotImplemented)
+}

internal/app/validate.go

@@ -0,0 +1,14 @@
+package app
+
+import (
+	"context"
+	"fmt"
+)
+
+type ValidateOptions struct {
+	Path string
+}
+
+func Validate(context.Context, ValidateOptions) error {
+	return fmt.Errorf("validate command: %w", ErrNotImplemented)
+}