Use env vars to read profile if databricks.yml is absent (#70)

Tested manually and by running sync_test.go integration test bricks sync
works

project/config.go

@@ -77,7 +77,16 @@ func IsDatabricksProject() bool {
 }
 
 func loadProjectConf(root string) (c Config, err error) {
-	config, err := os.Open(filepath.Join(root, ConfigFile))
+	configFilePath := filepath.Join(root, ConfigFile)
+
+	if _, err := os.Stat(configFilePath); errors.Is(err, os.ErrNotExist) {
+		baseDir := filepath.Base(root)
+		// If bricks config file is missing we assume the project root dir name
+		// as the name of the project
+		return Config{Name: baseDir}, nil
+	}
+
+	config, err := os.Open(configFilePath)
 	if err != nil {
 		return
 	}

project/project.go

@@ -58,7 +58,16 @@ func Initialize(ctx context.Context, root string) (context.Context, error) {
 		config: &config,
 	}
 
-	p.wsc = workspaces.New(&databricks.Config{Profile: config.Profile})
+	if config.Profile == "" {
+		// Bricks config doesn't define the profile to use, so go sdk will figure
+		// out the auth credentials based on the enviroment.
+		// eg. DATABRICKS_CONFIG_PROFILE can be used to select which profile to use or
+		// DATABRICKS_HOST and DATABRICKS_TOKEN can be used to set the workspace auth creds
+		p.wsc = workspaces.New()
+	} else {
+		p.wsc = workspaces.New(&databricks.Config{Profile: config.Profile})
+	}
+
 	return context.WithValue(ctx, &projectKey, &p), nil
 }