Report engine: terraform in bundle debug list-targets

acceptance/bundle/debug/list-targets-root-engine/databricks.yml

@@ -0,0 +1,11 @@
+bundle:
+  name: test-bundle
+  engine: terraform
+
+targets:
+  inherited:
+    default: true
+  uses_direct:
+    bundle:
+      engine: direct
+  null_target:

acceptance/bundle/debug/list-targets-root-engine/out.test.toml

@@ -0,0 +1,2 @@
+Cloud = false
+EnvMatrix.DMS = ["", "true"]

acceptance/bundle/debug/list-targets-root-engine/output.txt

@@ -0,0 +1,23 @@
+
+>>> [CLI] bundle debug list-targets
+inherited (default) engine:terraform
+null_target engine:terraform
+uses_direct
+
+>>> [CLI] bundle debug list-targets --output json
+{
+  "targets": [
+    {
+      "name": "inherited",
+      "default": true,
+      "engine": "terraform"
+    },
+    {
+      "name": "null_target",
+      "engine": "terraform"
+    },
+    {
+      "name": "uses_direct"
+    }
+  ]
+}

acceptance/bundle/debug/list-targets-root-engine/script

@@ -0,0 +1,2 @@
+trace $CLI bundle debug list-targets
+trace $CLI bundle debug list-targets --output json

acceptance/bundle/debug/list-targets/databricks.yml

@@ -20,6 +20,12 @@ targets:
     mode: production
     workspace:
       host: https://prod.example.com
+  uses_terraform:
+    bundle:
+      engine: terraform
+  uses_direct:
+    bundle:
+      engine: direct
   with_vars:
     default: ${var.is_default}
     mode: ${var.target_mode}

acceptance/bundle/debug/list-targets/output.txt

@@ -3,6 +3,8 @@
 dev (default) development https://dev.example.com
 prod production https://prod.example.com
 staging
+uses_direct
+uses_terraform engine:terraform
 with_vars ${var.target_mode} ${var.target_host}
 
 >>> [CLI] bundle debug list-targets --output json
@@ -22,6 +24,13 @@ with_vars ${var.target_mode} ${var.target_host}
     {
       "name": "staging"
     },
+    {
+      "name": "uses_direct"
+    },
+    {
+      "name": "uses_terraform",
+      "engine": "terraform"
+    },
     {
       "name": "with_vars",
       "mode": "${var.target_mode}",

cmd/bundle/debug/list_targets.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/databricks/cli/bundle"
 	"github.com/databricks/cli/bundle/config"
+	"github.com/databricks/cli/bundle/config/engine"
 	"github.com/databricks/cli/bundle/phases"
 	"github.com/databricks/cli/cmd/root"
 	"github.com/databricks/cli/libs/cmdio"
@@ -23,13 +24,18 @@ type targetInfo struct {
 	Default bool        `json:"default,omitempty"`
 	Mode    config.Mode `json:"mode,omitempty"`
 	Host    string      `json:"host,omitempty"`
+
+	// Engine is only reported for targets that use the removed Terraform engine.
+	Engine engine.EngineType `json:"engine,omitempty"`
 }
 
 type listTargetsOutput struct {
 	Targets []targetInfo `json:"targets"`
 }
 
-func collectTargets(targets map[string]*config.Target) []targetInfo {
+// collectTargets returns the targets sorted by name. The engine of a target is
+// its own bundle.engine if set, otherwise the top-level bundle.engine.
+func collectTargets(targets map[string]*config.Target, rootEngine engine.EngineType) []targetInfo {
 	names := slices.Sorted(maps.Keys(targets))
 
 	result := make([]targetInfo, 0, len(names))
@@ -38,7 +44,7 @@ func collectTargets(targets map[string]*config.Target) []targetInfo {
 		// YAML decoding can leave a nil entry in the map when a target is
 		// declared with a null value. Skip rather than dereference and panic.
 		if t == nil {
-			result = append(result, targetInfo{Name: name})
+			result = append(result, targetInfo{Name: name, Engine: terraformOnly(rootEngine)})
 			continue
 		}
 		info := targetInfo{
@@ -49,13 +55,25 @@ func collectTargets(targets map[string]*config.Target) []targetInfo {
 		if t.Workspace != nil {
 			info.Host = t.Workspace.Host
 		}
+		targetEngine := rootEngine
+		if t.Bundle != nil && t.Bundle.Engine != engine.EngineNotSet {
+			targetEngine = t.Bundle.Engine
+		}
+		info.Engine = terraformOnly(targetEngine)
 		result = append(result, info)
 	}
 	return result
 }
 
+func terraformOnly(e engine.EngineType) engine.EngineType {
+	if e == engine.EngineTerraform {
+		return e
+	}
+	return engine.EngineNotSet
+}
+
 // NewListTargetsCommand returns a command that lists all bundle targets
-// with their name, default, mode, and workspace host fields.
+// with their name, default, mode, workspace host, and (if terraform) engine fields.
 func NewListTargetsCommand() *cobra.Command {
 	cmd := &cobra.Command{
 		Use:    "list-targets",
@@ -79,7 +97,7 @@ func NewListTargetsCommand() *cobra.Command {
 			return root.ErrAlreadyPrinted
 		}
 
-		targets := collectTargets(b.Config.Targets)
+		targets := collectTargets(b.Config.Targets, b.Config.Bundle.Engine)
 
 		switch root.OutputType(cmd) {
 		case flags.OutputText:
@@ -94,6 +112,9 @@ func NewListTargetsCommand() *cobra.Command {
 				if t.Host != "" {
 					parts = append(parts, t.Host)
 				}
+				if t.Engine != "" {
+					parts = append(parts, "engine:"+string(t.Engine))
+				}
 				cmdio.LogString(ctx, strings.Join(parts, " "))
 			}
 		case flags.OutputJSON: