Added support for glob patterns in pipeline libraries section (#833)

## Changes
Now it's possible to specify glob pattern in pipeline libraries section
and DAB will add all matched files as libraries

```
  pipelines:
    dummy:
      name: " DLT with Python files"
      target: "dlt_python_files"
      libraries:
        - file:
            path: ./*.py
```

## Tests
Added unit test

bundle/config/mutator/expand_pipeline_glob_paths.go

@@ -0,0 +1,89 @@
+package mutator
+
+import (
+	"context"
+	"fmt"
+	"path/filepath"
+
+	"github.com/databricks/cli/bundle"
+	"github.com/databricks/cli/bundle/libraries"
+	"github.com/databricks/databricks-sdk-go/service/pipelines"
+)
+
+type expandPipelineGlobPaths struct{}
+
+func ExpandPipelineGlobPaths() bundle.Mutator {
+	return &expandPipelineGlobPaths{}
+}
+
+func (m *expandPipelineGlobPaths) Apply(_ context.Context, b *bundle.Bundle) error {
+	for key, pipeline := range b.Config.Resources.Pipelines {
+		dir, err := pipeline.ConfigFileDirectory()
+		if err != nil {
+			return fmt.Errorf("unable to determine directory for pipeline %s: %w", key, err)
+		}
+
+		expandedLibraries := make([]pipelines.PipelineLibrary, 0)
+		for i := 0; i < len(pipeline.Libraries); i++ {
+
+			library := &pipeline.Libraries[i]
+			path := getGlobPatternToExpand(library)
+			if path == "" || !libraries.IsLocalPath(path) {
+				expandedLibraries = append(expandedLibraries, *library)
+				continue
+			}
+
+			matches, err := filepath.Glob(filepath.Join(dir, path))
+			if err != nil {
+				return err
+			}
+
+			for _, match := range matches {
+				m, err := filepath.Rel(dir, match)
+				if err != nil {
+					return err
+				}
+				expandedLibraries = append(expandedLibraries, cloneWithPath(library, m))
+			}
+		}
+		pipeline.Libraries = expandedLibraries
+	}
+
+	return nil
+}
+
+func getGlobPatternToExpand(library *pipelines.PipelineLibrary) string {
+	if library.File != nil {
+		return library.File.Path
+	}
+
+	if library.Notebook != nil {
+		return library.Notebook.Path
+	}
+
+	return ""
+}
+
+func cloneWithPath(library *pipelines.PipelineLibrary, path string) pipelines.PipelineLibrary {
+	if library.File != nil {
+		return pipelines.PipelineLibrary{
+			File: &pipelines.FileLibrary{
+				Path: path,
+			},
+		}
+	}
+
+	if library.Notebook != nil {
+		return pipelines.PipelineLibrary{
+			Notebook: &pipelines.NotebookLibrary{
+				Path: path,
+			},
+		}
+	}
+
+	return pipelines.PipelineLibrary{}
+}
+
+func (*expandPipelineGlobPaths) Name() string {
+	return "ExpandPipelineGlobPaths"
+}

bundle/config/mutator/expand_pipeline_glob_paths_test.go

@@ -0,0 +1,154 @@
+package mutator
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/databricks/cli/bundle"
+	"github.com/databricks/cli/bundle/config"
+	"github.com/databricks/cli/bundle/config/paths"
+	"github.com/databricks/cli/bundle/config/resources"
+	"github.com/databricks/databricks-sdk-go/service/compute"
+	"github.com/databricks/databricks-sdk-go/service/pipelines"
+	"github.com/stretchr/testify/require"
+)
+
+func touchEmptyFile(t *testing.T, path string) {
+	err := os.MkdirAll(filepath.Dir(path), 0700)
+	require.NoError(t, err)
+	f, err := os.Create(path)
+	require.NoError(t, err)
+	f.Close()
+}
+
+func TestExpandGlobPathsInPipelines(t *testing.T) {
+	dir := t.TempDir()
+
+	touchEmptyFile(t, filepath.Join(dir, "test1.ipynb"))
+	touchEmptyFile(t, filepath.Join(dir, "test/test2.ipynb"))
+	touchEmptyFile(t, filepath.Join(dir, "test/test3.ipynb"))
+	touchEmptyFile(t, filepath.Join(dir, "test1.jar"))
+	touchEmptyFile(t, filepath.Join(dir, "test/test2.jar"))
+	touchEmptyFile(t, filepath.Join(dir, "test/test3.jar"))
+	touchEmptyFile(t, filepath.Join(dir, "test1.py"))
+	touchEmptyFile(t, filepath.Join(dir, "test/test2.py"))
+	touchEmptyFile(t, filepath.Join(dir, "test/test3.py"))
+
+	b := &bundle.Bundle{
+		Config: config.Root{
+			Path: dir,
+			Resources: config.Resources{
+				Pipelines: map[string]*resources.Pipeline{
+					"pipeline": {
+						Paths: paths.Paths{
+							ConfigFilePath: filepath.Join(dir, "resource.yml"),
+						},
+						PipelineSpec: &pipelines.PipelineSpec{
+							Libraries: []pipelines.PipelineLibrary{
+								{
+									Notebook: &pipelines.NotebookLibrary{
+										Path: "./**/*.ipynb",
+									},
+								},
+								{
+									Jar: "./*.jar",
+								},
+								{
+									File: &pipelines.FileLibrary{
+										Path: "./**/*.py",
+									},
+								},
+								{
+									Maven: &compute.MavenLibrary{
+										Coordinates: "org.jsoup:jsoup:1.7.2",
+									},
+								},
+								{
+									Notebook: &pipelines.NotebookLibrary{
+										Path: "./test1.ipynb",
+									},
+								},
+								{
+									Notebook: &pipelines.NotebookLibrary{
+										Path: "/Workspace/Users/me@company.com/test.ipynb",
+									},
+								},
+								{
+									Notebook: &pipelines.NotebookLibrary{
+										Path: "dbfs:/me@company.com/test.ipynb",
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	m := ExpandPipelineGlobPaths()
+	err := bundle.Apply(context.Background(), b, m)
+	require.NoError(t, err)
+
+	libraries := b.Config.Resources.Pipelines["pipeline"].Libraries
+	require.Len(t, libraries, 9)
+
+	// Making sure glob patterns are expanded correctly
+	require.True(t, containsNotebook(libraries, filepath.Join("test", "test2.ipynb")))
+	require.True(t, containsNotebook(libraries, filepath.Join("test", "test3.ipynb")))
+	require.True(t, containsFile(libraries, filepath.Join("test", "test2.py")))
+	require.True(t, containsFile(libraries, filepath.Join("test", "test3.py")))
+
+	// Making sure exact file references work as well
+	require.True(t, containsNotebook(libraries, "test1.ipynb"))
+
+	// Making sure absolute pass to remote FS file references work as well
+	require.True(t, containsNotebook(libraries, "/Workspace/Users/me@company.com/test.ipynb"))
+	require.True(t, containsNotebook(libraries, "dbfs:/me@company.com/test.ipynb"))
+
+	// Making sure other libraries are not replaced
+	require.True(t, containsJar(libraries, "./*.jar"))
+	require.True(t, containsMaven(libraries, "org.jsoup:jsoup:1.7.2"))
+}
+
+func containsNotebook(libraries []pipelines.PipelineLibrary, path string) bool {
+	for _, l := range libraries {
+		if l.Notebook != nil && l.Notebook.Path == path {
+			return true
+		}
+	}
+
+	return false
+}
+
+func containsJar(libraries []pipelines.PipelineLibrary, path string) bool {
+	for _, l := range libraries {
+		if l.Jar == path {
+			return true
+		}
+	}
+
+	return false
+}
+
+func containsMaven(libraries []pipelines.PipelineLibrary, coordinates string) bool {
+	for _, l := range libraries {
+		if l.Maven != nil && l.Maven.Coordinates == coordinates {
+			return true
+		}
+	}
+
+	return false
+}
+
+func containsFile(libraries []pipelines.PipelineLibrary, path string) bool {
+	for _, l := range libraries {
+		if l.File != nil && l.File.Path == path {
+			return true
+		}
+	}
+
+	return false
+}

bundle/libraries/libraries.go

@@ -161,6 +161,10 @@ func isLocalLibrary(library *compute.Library) bool {
 		return false
 	}
 
+	return IsLocalPath(path)
+}
+
+func IsLocalPath(path string) bool {
 	if isExplicitFileScheme(path) {
 		return true
 	}

bundle/phases/initialize.go

@@ -31,6 +31,7 @@ func Initialize() bundle.Mutator {
 			),
 			mutator.OverrideCompute(),
 			mutator.ProcessTargetMode(),
+			mutator.ExpandPipelineGlobPaths(),
 			mutator.TranslatePaths(),
 			python.WrapperWarning(),
 			terraform.Initialize(),