Allow referencing local Python wheels without artifacts section defined (#703)

## Changes
Now if the user reference local Python wheel files and do not specify
"artifacts" section, this file will be automatically uploaded by CLI.

Fixes #693 

## Tests
Added unit tests

Ran bundle deploy for this configuration
```
resources:
  jobs:
    some_other_job:
      name: "[${bundle.environment}] My Wheel Job"
      tasks:
        - task_key: TestTask
          existing_cluster_id: ${var.job_existing_cluster}
          python_wheel_task:
            package_name: "my_test_code"
            entry_point: "run"
          libraries:
          - whl: ./dist/*.whl
 ```
 
 Result
 
 ```
andrew.nester@HFW9Y94129 wheel % databricks bundle deploy
artifacts.whl.AutoDetect: Detecting Python wheel project...
artifacts.whl.AutoDetect: No Python wheel project found at bundle root folder
Starting upload of bundle files
Uploaded bundle files at /Users/andrew.nester@databricks.com/.bundle/wheel-task/default/files!

artifacts.Upload(my_test_code-0.0.1-py3-none-any.whl): Uploading...
artifacts.Upload(my_test_code-0.0.1-py3-none-any.whl): Upload succeeded
 
 ```

bundle/artifacts/autodetect.go

@@ -28,5 +28,6 @@ func (m *autodetect) Apply(ctx context.Context, b *bundle.Bundle) error {
 
 	return bundle.Apply(ctx, b, bundle.Seq(
 		whl.DetectPackage(),
+		whl.DefineArtifactsFromLibraries(),
 	))
 }

bundle/artifacts/infer.go

@@ -47,7 +47,11 @@ func (m *infer) Apply(ctx context.Context, b *bundle.Bundle) error {
 		return fmt.Errorf("artifact doesn't exist: %s", m.name)
 	}
 
-	if artifact.BuildCommand != "" {
+	// only try to infer command if it's not already defined
+	// and there is no explicitly files defined which means
+	// that the package is built outside of bundle cycles
+	// manually by customer
+	if artifact.BuildCommand != "" || len(artifact.Files) > 0 {
 		return nil
 	}
 

bundle/artifacts/whl/from_libraries.go

@@ -0,0 +1,56 @@
+package whl
+
+import (
+	"context"
+	"path/filepath"
+
+	"github.com/databricks/cli/bundle"
+	"github.com/databricks/cli/bundle/config"
+	"github.com/databricks/cli/bundle/libraries"
+	"github.com/databricks/cli/libs/log"
+)
+
+type fromLibraries struct{}
+
+func DefineArtifactsFromLibraries() bundle.Mutator {
+	return &fromLibraries{}
+}
+
+func (m *fromLibraries) Name() string {
+	return "artifacts.whl.DefineArtifactsFromLibraries"
+}
+
+func (*fromLibraries) Apply(ctx context.Context, b *bundle.Bundle) error {
+	if len(b.Config.Artifacts) != 0 {
+		log.Debugf(ctx, "Skipping defining artifacts from libraries because artifacts section is explicitly defined")
+		return nil
+	}
+
+	tasks := libraries.FindAllWheelTasks(b)
+	for _, task := range tasks {
+		for _, lib := range task.Libraries {
+			matches, err := filepath.Glob(filepath.Join(b.Config.Path, lib.Whl))
+			// File referenced from libraries section does not exists, skipping
+			if err != nil {
+				continue
+			}
+
+			for _, match := range matches {
+				name := filepath.Base(match)
+				if b.Config.Artifacts == nil {
+					b.Config.Artifacts = make(map[string]*config.Artifact)
+				}
+
+				log.Debugf(ctx, "Adding an artifact block for %s", match)
+				b.Config.Artifacts[name] = &config.Artifact{
+					Files: []config.ArtifactFile{
+						{Source: match},
+					},
+					Type: config.ArtifactPythonWheel,
+				}
+			}
+		}
+	}
+
+	return nil
+}

bundle/tests/bundle/python_wheel_no_artifact_no_setup/.gitignore

@@ -0,0 +1,3 @@
+build/
+*.egg-info
+.databricks

bundle/tests/bundle/python_wheel_no_artifact_no_setup/bundle.yml

@@ -0,0 +1,22 @@
+bundle:
+  name: python-wheel-local
+
+resources:
+  jobs:
+    test_job:
+      name: "[${bundle.environment}] My Wheel Job"
+      tasks:
+        - task_key: TestTask
+          existing_cluster_id: "0717-aaaaa-bbbbbb"
+          python_wheel_task:
+            package_name: "my_test_code"
+            entry_point: "run"
+          libraries:
+          - whl: ./package/*.whl
+        - task_key: TestTask2
+          existing_cluster_id: "0717-aaaaa-bbbbbb"
+          python_wheel_task:
+            package_name: "my_test_code"
+            entry_point: "run"
+          libraries:
+          - whl: ./non-existing/*.whl

bundle/tests/bundle/wheel_test.go

@@ -60,3 +60,29 @@ func TestBundlePythonWheelWithDBFSLib(t *testing.T) {
 	err = match.Apply(ctx, b)
 	require.NoError(t, err)
 }
+
+func TestBundlePythonWheelBuildNoBuildJustUpload(t *testing.T) {
+	ctx := context.Background()
+	b, err := bundle.Load(ctx, "./python_wheel_no_artifact_no_setup")
+	require.NoError(t, err)
+
+	m := phases.Build()
+	err = m.Apply(ctx, b)
+	require.NoError(t, err)
+
+	match := libraries.MatchWithArtifacts()
+	err = match.Apply(ctx, b)
+	require.ErrorContains(t, err, "./non-existing/*.whl")
+
+	require.NotZero(t, len(b.Config.Artifacts))
+
+	artifact := b.Config.Artifacts["my_test_code-0.0.1-py3-none-any.whl"]
+	require.NotNil(t, artifact)
+	require.Empty(t, artifact.BuildCommand)
+	require.Contains(t, artifact.Files[0].Source, filepath.Join(
+		b.Config.Path,
+		"package",
+		"my_test_code-0.0.1-py3-none-any.whl",
+	))
+	require.True(t, artifact.Files[0].NeedsUpload())
+}