Add Makefile / .drone.yml, use go module with vendor (#20)

* add Makefile / .drone.yml, use go module with vendor

* Update .drone.yml

Co-Authored-By: lunny <xiaolunwen@gmail.com>

vendor/code.gitea.io/sdk/gitea/repo_collaborator.go

@@ -0,0 +1,57 @@
+// Copyright 2016 The Gogs Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+package gitea
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+)
+
+// ListCollaborators list a repository's collaborators
+func (c *Client) ListCollaborators(user, repo string) ([]*User, error) {
+	collaborators := make([]*User, 0, 10)
+	err := c.getParsedResponse("GET",
+		fmt.Sprintf("/repos/%s/%s/collaborators", user, repo),
+		nil, nil, &collaborators)
+	return collaborators, err
+}
+
+// IsCollaborator check if a user is a collaborator of a repository
+func (c *Client) IsCollaborator(user, repo, collaborator string) (bool, error) {
+	status, err := c.getStatusCode("GET",
+		fmt.Sprintf("/repos/%s/%s/collaborators/%s", user, repo, collaborator),
+		nil, nil)
+	if err != nil {
+		return false, err
+	}
+	if status == 204 {
+		return true, nil
+	}
+	return false, nil
+}
+
+// AddCollaboratorOption options when adding a user as a collaborator of a repository
+type AddCollaboratorOption struct {
+	Permission *string `json:"permission"`
+}
+
+// AddCollaborator add some user as a collaborator of a repository
+func (c *Client) AddCollaborator(user, repo, collaborator string, opt AddCollaboratorOption) error {
+	body, err := json.Marshal(&opt)
+	if err != nil {
+		return err
+	}
+	_, err = c.getResponse("PUT", fmt.Sprintf("/repos/%s/%s/collaborators/%s", user, repo, collaborator), nil, bytes.NewReader(body))
+	return err
+}
+
+// DeleteCollaborator remove a collaborator from a repository
+func (c *Client) DeleteCollaborator(user, repo, collaborator string) error {
+	_, err := c.getResponse("DELETE",
+		fmt.Sprintf("/repos/%s/%s/collaborators/%s", user, repo, collaborator),
+		nil, nil)
+	return err
+}