Fix bundle generate job to preserve nested notebook directory structure

acceptance/bundle/generate/job_nested_notebooks/databricks.yml

@@ -0,0 +1,2 @@
+bundle:
+  name: nested_notebooks

acceptance/bundle/generate/job_nested_notebooks/out.job.yml

@@ -0,0 +1,11 @@
+resources:
+  jobs:
+    out:
+      name: dev.my_repo.my_job
+      tasks:
+        - task_key: my_notebook_task
+          notebook_task:
+            notebook_path: src/my_folder/my_notebook.py
+        - task_key: other_notebook_task
+          notebook_task:
+            notebook_path: src/other_folder/other_notebook.py

acceptance/bundle/generate/job_nested_notebooks/output.txt

@@ -0,0 +1,5 @@
+File successfully saved to src/my_folder/my_notebook.py
+File successfully saved to src/other_folder/other_notebook.py
+Job configuration successfully saved to out.job.yml
+src/my_folder/my_notebook.py
+src/other_folder/other_notebook.py

acceptance/bundle/generate/job_nested_notebooks/script

@@ -0,0 +1,2 @@
+$CLI bundle generate job --existing-job-id 1234 --config-dir . --key out --force --source-dir src 2>&1 | sort
+find src -type f | sort

acceptance/bundle/generate/job_nested_notebooks/test.toml

@@ -0,0 +1,42 @@
+Ignore = ["src"]
+
+[[Server]]
+Pattern = "GET /api/2.2/jobs/get"
+Response.Body = '''
+{
+    "job_id": 11223344,
+    "settings": {
+        "name": "dev.my_repo.my_job",
+        "tasks": [
+            {
+                "task_key": "my_notebook_task",
+                "notebook_task": {
+                    "notebook_path": "/my_data_product/dev/my_folder/my_notebook"
+                }
+            },
+            {
+                "task_key": "other_notebook_task",
+                "notebook_task": {
+                    "notebook_path": "/my_data_product/dev/other_folder/other_notebook"
+                }
+            }
+        ]
+    }
+}
+'''
+
+[[Server]]
+Pattern = "GET /api/2.0/workspace/get-status"
+Response.Body = '''
+{
+    "object_type": "NOTEBOOK",
+    "language": "PYTHON",
+    "repos_export_format": "SOURCE"
+}
+'''
+
+[[Server]]
+Pattern = "GET /api/2.0/workspace/export"
+Response.Body = '''
+print("Hello, World!")
+'''

bundle/generate/downloader.go

@@ -207,6 +207,52 @@ func (n *Downloader) markNotebookForDownload(ctx context.Context, notebookPath *
 	return nil
 }
 
+func (n *Downloader) MarkTasksForDownload(ctx context.Context, tasks []jobs.Task) error {
+	var paths []string
+	for _, task := range tasks {
+		if task.NotebookTask != nil {
+			paths = append(paths, task.NotebookTask.NotebookPath)
+		}
+	}
+	if len(paths) > 0 {
+		n.basePath = commonDirPrefix(paths)
+	}
+	for i := range tasks {
+		if err := n.MarkTaskForDownload(ctx, &tasks[i]); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// commonDirPrefix returns the longest common directory-aligned prefix of the given paths.
+func commonDirPrefix(paths []string) string {
+	if len(paths) == 0 {
+		return ""
+	}
+	if len(paths) == 1 {
+		return path.Dir(paths[0])
+	}
+
+	prefix := paths[0]
+	for _, p := range paths[1:] {
+		for !strings.HasPrefix(p, prefix) {
+			prefix = prefix[:len(prefix)-1]
+			if prefix == "" {
+				return ""
+			}
+		}
+	}
+
+	// Truncate to last '/' to ensure directory alignment.
+	if i := strings.LastIndex(prefix, "/"); i >= 0 {
+		prefix = prefix[:i]
+	} else {
+		prefix = ""
+	}
+	return prefix
+}
+
 func (n *Downloader) relativePath(fullPath string) string {
 	basePath := path.Dir(fullPath)
 	if n.basePath != "" {

bundle/generate/downloader_test.go

@@ -2,10 +2,15 @@ package generate
 
 import (
 	"context"
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
 	"path/filepath"
 	"testing"
 
+	"github.com/databricks/databricks-sdk-go"
 	"github.com/databricks/databricks-sdk-go/experimental/mocks"
+	"github.com/databricks/databricks-sdk-go/service/jobs"
 	"github.com/databricks/databricks-sdk-go/service/workspace"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
@@ -94,3 +99,158 @@ func TestDownloader_DoesNotRecurseIntoNodeModules(t *testing.T) {
 	assert.Contains(t, downloader.files, filepath.Join(sourceDir, "app.py"))
 	assert.Contains(t, downloader.files, filepath.Join(sourceDir, "src/index.js"))
 }
+
+func TestCommonDirPrefix(t *testing.T) {
+	tests := []struct {
+		name  string
+		paths []string
+		want  string
+	}{
+		{
+			name:  "empty",
+			paths: nil,
+			want:  "",
+		},
+		{
+			name:  "single path",
+			paths: []string{"/a/b/c"},
+			want:  "/a/b",
+		},
+		{
+			name:  "shared parent",
+			paths: []string{"/a/b/c", "/a/b/d"},
+			want:  "/a/b",
+		},
+		{
+			name:  "root divergence",
+			paths: []string{"/x/y", "/z/w"},
+			want:  "",
+		},
+		{
+			name:  "partial dir name safety",
+			paths: []string{"/a/bc/d", "/a/bd/e"},
+			want:  "/a",
+		},
+		{
+			name:  "nested shared prefix",
+			paths: []string{"/Users/user/project/etl/extract", "/Users/user/project/reporting/dashboard"},
+			want:  "/Users/user/project",
+		},
+		{
+			name:  "identical paths",
+			paths: []string{"/a/b/c", "/a/b/c"},
+			want:  "/a/b",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			assert.Equal(t, tt.want, commonDirPrefix(tt.paths))
+		})
+	}
+}
+
+func newTestWorkspaceClient(t *testing.T, handler http.HandlerFunc) *databricks.WorkspaceClient {
+	server := httptest.NewServer(handler)
+	t.Cleanup(server.Close)
+
+	w, err := databricks.NewWorkspaceClient(&databricks.Config{
+		Host:  server.URL,
+		Token: "test-token",
+	})
+	require.NoError(t, err)
+	return w
+}
+
+func notebookStatusHandler(t *testing.T) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/api/2.0/workspace/get-status" {
+			t.Fatalf("unexpected request path: %s", r.URL.Path)
+		}
+		resp := workspaceStatus{
+			Language:     workspace.LanguagePython,
+			ObjectType:   workspace.ObjectTypeNotebook,
+			ExportFormat: workspace.ExportFormatSource,
+		}
+		w.Header().Set("Content-Type", "application/json")
+		err := json.NewEncoder(w).Encode(resp)
+		if err != nil {
+			t.Fatal(err)
+		}
+	}
+}
+
+func TestDownloader_MarkTasksForDownload_PreservesStructure(t *testing.T) {
+	ctx := context.Background()
+	w := newTestWorkspaceClient(t, notebookStatusHandler(t))
+
+	dir := "base/dir"
+	sourceDir := filepath.Join(dir, "source")
+	configDir := filepath.Join(dir, "config")
+	downloader := NewDownloader(w, sourceDir, configDir)
+
+	tasks := []jobs.Task{
+		{
+			TaskKey: "extract_task",
+			NotebookTask: &jobs.NotebookTask{
+				NotebookPath: "/Users/user/project/etl/extract",
+			},
+		},
+		{
+			TaskKey: "dashboard_task",
+			NotebookTask: &jobs.NotebookTask{
+				NotebookPath: "/Users/user/project/reporting/dashboard",
+			},
+		},
+	}
+
+	err := downloader.MarkTasksForDownload(ctx, tasks)
+	require.NoError(t, err)
+
+	assert.Equal(t, filepath.FromSlash("../source/etl/extract.py"), tasks[0].NotebookTask.NotebookPath)
+	assert.Equal(t, filepath.FromSlash("../source/reporting/dashboard.py"), tasks[1].NotebookTask.NotebookPath)
+	assert.Len(t, downloader.files, 2)
+}
+
+func TestDownloader_MarkTasksForDownload_SingleNotebook(t *testing.T) {
+	ctx := context.Background()
+	w := newTestWorkspaceClient(t, notebookStatusHandler(t))
+
+	dir := "base/dir"
+	sourceDir := filepath.Join(dir, "source")
+	configDir := filepath.Join(dir, "config")
+	downloader := NewDownloader(w, sourceDir, configDir)
+
+	tasks := []jobs.Task{
+		{
+			TaskKey: "task1",
+			NotebookTask: &jobs.NotebookTask{
+				NotebookPath: "/Users/user/project/notebook",
+			},
+		},
+	}
+
+	err := downloader.MarkTasksForDownload(ctx, tasks)
+	require.NoError(t, err)
+
+	// Single notebook: basePath = path.Dir => same as old behavior.
+	assert.Equal(t, filepath.FromSlash("../source/notebook.py"), tasks[0].NotebookTask.NotebookPath)
+	assert.Len(t, downloader.files, 1)
+}
+
+func TestDownloader_MarkTasksForDownload_NoNotebooks(t *testing.T) {
+	ctx := context.Background()
+	w := newTestWorkspaceClient(t, func(w http.ResponseWriter, r *http.Request) {
+		t.Fatalf("unexpected request: %s %s", r.Method, r.URL.Path)
+	})
+
+	downloader := NewDownloader(w, "source", "config")
+
+	tasks := []jobs.Task{
+		{TaskKey: "spark_task"},
+		{TaskKey: "python_wheel_task"},
+	}
+
+	err := downloader.MarkTasksForDownload(ctx, tasks)
+	require.NoError(t, err)
+	assert.Empty(t, downloader.files)
+}

cmd/bundle/generate/job.go

@@ -92,11 +92,9 @@ After generation, you can deploy this job to other targets using:
 		if job.Settings.GitSource != nil {
 			cmdio.LogString(ctx, "Job is using Git source, skipping downloading files")
 		} else {
-			for _, task := range job.Settings.Tasks {
-				err := downloader.MarkTaskForDownload(ctx, &task)
-				if err != nil {
-					return err
-				}
+			err = downloader.MarkTasksForDownload(ctx, job.Settings.Tasks)
+			if err != nil {
+				return err
 			}
 		}