Add the support for delete of the bitbucket file (drone#139)

* Add the support for delete of the bitbucket

* Removed the print statements

* Fix the delete file in bitbucket test

scm/driver/bitbucket/bitbucket.go

@@ -98,6 +98,36 @@ func (c *wrapper) do(ctx context.Context, method, path string, in, out interface
 			req.Header = map[string][]string{
 				"Content-Type": {w.FormDataContentType()},
 			}
+		case *contentDelete:
+			body := &bytes.Buffer{}
+			writer := multipart.NewWriter(body)
+			fw, err := writer.CreateFormField("files")
+			_, err = io.Copy(fw, strings.NewReader(content.File))
+			if err != nil {
+				return nil, err
+			}
+			fw, err = writer.CreateFormField("message")
+			_, err = io.Copy(fw, strings.NewReader(content.Message))
+			if err != nil {
+				return nil, err
+			}
+			fw, err = writer.CreateFormField("author")
+			_, err = io.Copy(fw, strings.NewReader(content.Author))
+			if err != nil {
+				return nil, err
+			}
+			if content.Branch != "" {
+				fw, err = writer.CreateFormField("branch")
+				_, err = io.Copy(fw, strings.NewReader(content.Branch))
+				if err != nil {
+					return nil, err
+				}
+			}
+			writer.Close()
+			req.Body = bytes.NewReader(body.Bytes())
+			req.Header = map[string][]string{
+				"Content-Type": {writer.FormDataContentType()},
+			}
 		default:
 			buf := new(bytes.Buffer)
 			json.NewEncoder(buf).Encode(in)

scm/driver/bitbucket/content.go

@@ -68,7 +68,17 @@ func (s *contentService) Update(ctx context.Context, repo, path string, params *
 }
 
 func (s *contentService) Delete(ctx context.Context, repo, path string, params *scm.ContentParams) (*scm.Response, error) {
-	return nil, scm.ErrNotSupported
+	author := fmt.Sprintf("%s <%s>", params.Signature.Name, params.Signature.Email)
+	endpoint := fmt.Sprintf("/2.0/repositories/%s/src", repo)
+	in := &contentDelete{
+		File:    path,
+		Branch:  params.Branch,
+		Message: params.Message,
+		Sha:     params.Sha,
+		Author:  author,
+	}
+	res, err := s.client.do(ctx, "POST", endpoint, in, nil)
+	return res, err
 }
 
 func (s *contentService) List(ctx context.Context, repo, path, ref string, opts scm.ListOptions) ([]*scm.ContentInfo, *scm.Response, error) {
@@ -109,6 +119,14 @@ type contentCreateUpdate struct {
 	Author  string `json:"author"`
 }
 
+type contentDelete struct {
+	File    string `json:"file"`
+	Branch  string `json:"branch"`
+	Message string `json:"message"`
+	Sha     string `json:"sha"`
+	Author  string `json:"author"`
+}
+
 func convertContentInfoList(from *contents) []*scm.ContentInfo {
 	to := []*scm.ContentInfo{}
 	for _, v := range from.Values {

scm/driver/bitbucket/content_test.go

@@ -183,10 +183,36 @@ func TestContentUpdateBadCommitID(t *testing.T) {
 }
 
 func TestContentDelete(t *testing.T) {
-	content := new(contentService)
-	_, err := content.Delete(context.Background(), "atlassian/atlaskit", "README", &scm.ContentParams{})
-	if err != scm.ErrNotSupported {
-		t.Errorf("Expect Not Supported error")
+	defer gock.Off()
+
+	gock.New("https://api.bitbucket.org").
+		Post("/2.0/repositories/atlassian/atlaskit/src").
+		Reply(201).
+		Type("application/json")
+
+	params := &scm.ContentParams{
+		Message: "my commit message",
+		Signature: scm.Signature{
+			Name:  "Monalisa Octocat",
+			Email: "[email protected]",
+		},
+	}
+
+	client := NewDefault()
+	res, err := client.Contents.Update(
+		context.Background(),
+		"atlassian/atlaskit",
+		"test/hello",
+		params,
+	)
+
+	if err != nil {
+		t.Error(err)
+		return
+	}
+
+	if res.Status != 201 {
+		t.Errorf("Unexpected Results")
 	}
 }