bump code.gitea.io/sdk/gitea from untaged to 0.11.0 (#92)

bump code.gitea.io/sdk/gitea from untaged to 0.11.0

Co-authored-by: 6543 <6543@obermui.de>
Reviewed-on: https://gitea.com/gitea/tea/pulls/92
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Reviewed-by: Andrew Thornton <art27@cantab.net>

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

@@ -1,4 +1,5 @@
 // Copyright 2014 The Gogs Authors. All rights reserved.
+// Copyright 2020 The Gitea Authors. All rights reserved.
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
@@ -12,6 +13,9 @@ import (
 	"io/ioutil"
 	"net/http"
 	"strings"
+	"sync"
+
+	"github.com/hashicorp/go-version"
 )
 
 var jsonHeader = http.Header{"content-type": []string{"application/json"}}
@@ -21,12 +25,16 @@ func Version() string {
 	return "0.12.3"
 }
 
-// Client represents a Gogs API client.
+// Client represents a Gitea API client.
 type Client struct {
-	url         string
-	accessToken string
-	sudo        string
-	client      *http.Client
+	url           string
+	accessToken   string
+	username      string
+	password      string
+	sudo          string
+	client        *http.Client
+	serverVersion *version.Version
+	versionLock   sync.RWMutex
 }
 
 // NewClient initializes and returns a API client.
@@ -45,6 +53,11 @@ func NewClientWithHTTP(url string, httpClient *http.Client) *Client {
 	return client
 }
 
+// SetBasicAuth sets basicauth
+func (c *Client) SetBasicAuth(username, password string) {
+	c.username, c.password = username, password
+}
+
 // SetHTTPClient replaces default http.Client with user given one.
 func (c *Client) SetHTTPClient(client *http.Client) {
 	c.client = client
@@ -63,6 +76,9 @@ func (c *Client) doRequest(method, path string, header http.Header, body io.Read
 	if len(c.accessToken) != 0 {
 		req.Header.Set("Authorization", "token "+c.accessToken)
 	}
+	if len(c.username) != 0 {
+		req.SetBasicAuth(c.username, c.password)
+	}
 	if c.sudo != "" {
 		req.Header.Set("Sudo", c.sudo)
 	}

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

@@ -0,0 +1,24 @@
+// Copyright 2020 The Gitea 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 (
+	"fmt"
+)
+
+// GitBlobResponse represents a git blob
+type GitBlobResponse struct {
+	Content  string `json:"content"`
+	Encoding string `json:"encoding"`
+	URL      string `json:"url"`
+	SHA      string `json:"sha"`
+	Size     int64  `json:"size"`
+}
+
+// GetBlob get the blob of a repository file
+func (c *Client) GetBlob(user, repo, sha string) (*GitBlobResponse, error) {
+	blob := new(GitBlobResponse)
+	return blob, c.getParsedResponse("GET", fmt.Sprintf("/repos/%s/%s/git/blobs/%s", user, repo, sha), nil, nil, blob)
+}

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

@@ -1,3 +1,8 @@
 module code.gitea.io/sdk/gitea
 
 go 1.12
+
+require (
+	github.com/hashicorp/go-version v1.2.0
+	github.com/stretchr/testify v1.4.0
+)

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

@@ -0,0 +1,13 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/hashicorp/go-version v1.2.0 h1:3vNe/fWF5CBgRIguda1meWhsZHy3m8gCJ5wx+dIzX/E=
+github.com/hashicorp/go-version v1.2.0/go.mod h1:fltr4n8CU8Ke44wwGCBoEymUuxUHl09ZGVZPK5anwXA=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.4.0 h1:2E4SXV/wtOkTonXsotYi4li6zVWxYlZuYNCXe9XRJyk=
+github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

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

@@ -9,6 +9,7 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
+	"net/url"
 	"time"
 )
 
@@ -44,26 +45,81 @@ type Issue struct {
 
 // ListIssueOption list issue options
 type ListIssueOption struct {
-	Page  int
-	State string
+	Page int
+	// open, closed, all
+	State   string
+	Labels  []string
+	KeyWord string
+}
+
+// QueryEncode turns options into querystring argument
+func (opt *ListIssueOption) QueryEncode() string {
+	query := make(url.Values)
+	if opt.Page > 0 {
+		query.Add("page", fmt.Sprintf("%d", opt.Page))
+	}
+	if len(opt.State) > 0 {
+		query.Add("state", opt.State)
+	}
+
+	if opt.Page > 0 {
+		query.Add("page", fmt.Sprintf("%d", opt.Page))
+	}
+	if len(opt.State) > 0 {
+		query.Add("state", opt.State)
+	}
+	if len(opt.Labels) > 0 {
+		var lq string
+		for _, l := range opt.Labels {
+			if len(lq) > 0 {
+				lq += ","
+			}
+			lq += l
+		}
+		query.Add("labels", lq)
+	}
+	if len(opt.KeyWord) > 0 {
+		query.Add("q", opt.KeyWord)
+	}
+
+	return query.Encode()
 }
 
 // ListIssues returns all issues assigned the authenticated user
 func (c *Client) ListIssues(opt ListIssueOption) ([]*Issue, error) {
+	link, _ := url.Parse("/repos/issues/search")
 	issues := make([]*Issue, 0, 10)
-	return issues, c.getParsedResponse("GET", fmt.Sprintf("/issues?page=%d", opt.Page), nil, nil, &issues)
+	link.RawQuery = opt.QueryEncode()
+	return issues, c.getParsedResponse("GET", link.String(), jsonHeader, nil, &issues)
 }
 
 // ListUserIssues returns all issues assigned to the authenticated user
 func (c *Client) ListUserIssues(opt ListIssueOption) ([]*Issue, error) {
+	// WARNING: "/user/issues" API is not implemented jet!
+	allIssues, err := c.ListIssues(opt)
+	if err != nil {
+		return nil, err
+	}
+	user, err := c.GetMyUserInfo()
+	if err != nil {
+		return nil, err
+	}
+	// Workaround: client sort out non user related issues
 	issues := make([]*Issue, 0, 10)
-	return issues, c.getParsedResponse("GET", fmt.Sprintf("/user/issues?page=%d", opt.Page), nil, nil, &issues)
+	for _, i := range allIssues {
+		if i.ID == user.ID {
+			issues = append(issues, i)
+		}
+	}
+	return issues, nil
 }
 
 // ListRepoIssues returns all issues for a given repository
 func (c *Client) ListRepoIssues(owner, repo string, opt ListIssueOption) ([]*Issue, error) {
+	link, _ := url.Parse(fmt.Sprintf("/repos/%s/%s/issues", owner, repo))
 	issues := make([]*Issue, 0, 10)
-	return issues, c.getParsedResponse("GET", fmt.Sprintf("/repos/%s/%s/issues?page=%d", owner, repo, opt.Page), nil, nil, &issues)
+	link.RawQuery = opt.QueryEncode()
+	return issues, c.getParsedResponse("GET", link.String(), jsonHeader, nil, &issues)
 }
 
 // GetIssue returns a single issue for a given repository
@@ -119,19 +175,3 @@ func (c *Client) EditIssue(owner, repo string, index int64, opt EditIssueOption)
 	return issue, c.getParsedResponse("PATCH", fmt.Sprintf("/repos/%s/%s/issues/%d", owner, repo, index),
 		jsonHeader, bytes.NewReader(body), issue)
 }
-
-// StartIssueStopWatch starts a stopwatch for an existing issue for a given
-// repository
-func (c *Client) StartIssueStopWatch(owner, repo string, index int64) error {
-	_, err := c.getResponse("POST", fmt.Sprintf("/repos/%s/%s/issues/%d/stopwatch/start", owner, repo, index),
-		jsonHeader, nil)
-	return err
-}
-
-// StopIssueStopWatch stops an existing stopwatch for an issue in a given
-// repository
-func (c *Client) StopIssueStopWatch(owner, repo string, index int64) error {
-	_, err := c.getResponse("POST", fmt.Sprintf("/repos/%s/%s/issues/%d/stopwatch/stop", owner, repo, index),
-		jsonHeader, nil)
-	return err
-}

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

@@ -0,0 +1,98 @@
+// Copyright 2020 The Gitea 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"
+	"time"
+)
+
+// Reaction contain one reaction
+type Reaction struct {
+	User     *User     `json:"user"`
+	Reaction string    `json:"content"`
+	Created  time.Time `json:"created_at"`
+}
+
+// GetIssueReactions get a list reactions of an issue
+func (c *Client) GetIssueReactions(owner, repo string, index int64) ([]*Reaction, error) {
+	if err := c.CheckServerVersionConstraint(">=1.11.0"); err != nil {
+		return nil, err
+	}
+	reactions := make([]*Reaction, 0, 10)
+	return reactions, c.getParsedResponse("GET", fmt.Sprintf("/repos/%s/%s/issues/%d/reactions", owner, repo, index), nil, nil, &reactions)
+}
+
+// GetIssueCommentReactions get a list of reactions from a comment of an issue
+func (c *Client) GetIssueCommentReactions(owner, repo string, commentID int64) ([]*Reaction, error) {
+	if err := c.CheckServerVersionConstraint(">=1.11.0"); err != nil {
+		return nil, err
+	}
+	reactions := make([]*Reaction, 0, 10)
+	return reactions, c.getParsedResponse("GET", fmt.Sprintf("/repos/%s/%s/issues/comments/%d/reactions", owner, repo, commentID), nil, nil, &reactions)
+}
+
+// editReactionOption contain the reaction type
+type editReactionOption struct {
+	Reaction string `json:"content"`
+}
+
+// PostIssueReaction add a reaction to an issue
+func (c *Client) PostIssueReaction(owner, repo string, index int64, reaction string) (*Reaction, error) {
+	if err := c.CheckServerVersionConstraint(">=1.11.0"); err != nil {
+		return nil, err
+	}
+	reactionResponse := new(Reaction)
+	body, err := json.Marshal(&editReactionOption{Reaction: reaction})
+	if err != nil {
+		return nil, err
+	}
+	return reactionResponse, c.getParsedResponse("POST", fmt.Sprintf("/repos/%s/%s/issues/%d/reactions", owner, repo, index),
+		jsonHeader, bytes.NewReader(body), reactionResponse)
+}
+
+// DeleteIssueReaction remove a reaction from an issue
+func (c *Client) DeleteIssueReaction(owner, repo string, index int64, reaction string) error {
+	if err := c.CheckServerVersionConstraint(">=1.11.0"); err != nil {
+		return err
+	}
+	body, err := json.Marshal(&editReactionOption{Reaction: reaction})
+	if err != nil {
+		return err
+	}
+	_, err = c.getResponse("DELETE", fmt.Sprintf("/repos/%s/%s/issues/%d/reactions", owner, repo, index), jsonHeader, bytes.NewReader(body))
+	return err
+}
+
+// PostIssueCommentReaction add a reaction to a comment of an issue
+func (c *Client) PostIssueCommentReaction(owner, repo string, commentID int64, reaction string) (*Reaction, error) {
+	if err := c.CheckServerVersionConstraint(">=1.11.0"); err != nil {
+		return nil, err
+	}
+	reactionResponse := new(Reaction)
+	body, err := json.Marshal(&editReactionOption{Reaction: reaction})
+	if err != nil {
+		return nil, err
+	}
+	return reactionResponse, c.getParsedResponse("POST", fmt.Sprintf("/repos/%s/%s/issues/comments/%d/reactions", owner, repo, commentID),
+		jsonHeader, bytes.NewReader(body), reactionResponse)
+}
+
+// DeleteIssueCommentReaction remove a reaction from a comment of an issue
+func (c *Client) DeleteIssueCommentReaction(owner, repo string, commentID int64, reaction string) error {
+	if err := c.CheckServerVersionConstraint(">=1.11.0"); err != nil {
+		return err
+	}
+	// swagger:operation DELETE /repos/{owner}/{repo}/issues/comments/{id}/reactions issue issueDeleteCommentReaction
+	body, err := json.Marshal(&editReactionOption{Reaction: reaction})
+	if err != nil {
+		return err
+	}
+	_, err = c.getResponse("DELETE", fmt.Sprintf("/repos/%s/%s/issues/comments/%d/reactions", owner, repo, commentID),
+		jsonHeader, bytes.NewReader(body))
+	return err
+}

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

@@ -0,0 +1,42 @@
+// Copyright 2020 The Gitea 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 (
+	"fmt"
+	"time"
+)
+
+// StopWatch represents a running stopwatch of an issue / pr
+type StopWatch struct {
+	Created    time.Time `json:"created"`
+	IssueIndex int64     `json:"issue_index"`
+}
+
+// GetMyStopwatches list all stopwatches
+func (c *Client) GetMyStopwatches() ([]*StopWatch, error) {
+	stopwatches := make([]*StopWatch, 0, 1)
+	return stopwatches, c.getParsedResponse("GET", "/user/stopwatches", nil, nil, &stopwatches)
+}
+
+// DeleteIssueStopwatch delete / cancel a specific stopwatch
+func (c *Client) DeleteIssueStopwatch(owner, repo string, index int64) error {
+	_, err := c.getResponse("DELETE", fmt.Sprintf("/repos/%s/%s/issues/%d/stopwatch/delete", owner, repo, index), nil, nil)
+	return err
+}
+
+// StartIssueStopWatch starts a stopwatch for an existing issue for a given
+// repository
+func (c *Client) StartIssueStopWatch(owner, repo string, index int64) error {
+	_, err := c.getResponse("POST", fmt.Sprintf("/repos/%s/%s/issues/%d/stopwatch/start", owner, repo, index), nil, nil)
+	return err
+}
+
+// StopIssueStopWatch stops an existing stopwatch for an issue in a given
+// repository
+func (c *Client) StopIssueStopWatch(owner, repo string, index int64) error {
+	_, err := c.getResponse("POST", fmt.Sprintf("/repos/%s/%s/issues/%d/stopwatch/stop", owner, repo, index), nil, nil)
+	return err
+}

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

@@ -0,0 +1,54 @@
+// Copyright 2020 The Gitea 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 (
+	"fmt"
+)
+
+// GetIssueSubscribers get list of users who subscribed on an issue
+func (c *Client) GetIssueSubscribers(owner, repo string, index int64) ([]*User, error) {
+	if err := c.CheckServerVersionConstraint(">=1.11.0"); err != nil {
+		return nil, err
+	}
+	subscribers := make([]*User, 0, 10)
+	return subscribers, c.getParsedResponse("GET", fmt.Sprintf("/repos/%s/%s/issues/%d/subscriptions", owner, repo, index), nil, nil, &subscribers)
+}
+
+// AddIssueSubscription Subscribe user to issue
+func (c *Client) AddIssueSubscription(owner, repo string, index int64, user string) error {
+	if err := c.CheckServerVersionConstraint(">=1.11.0"); err != nil {
+		return err
+	}
+	_, err := c.getResponse("PUT", fmt.Sprintf("/repos/%s/%s/issues/%d/subscriptions/%s", owner, repo, index, user), nil, nil)
+	return err
+}
+
+// DeleteIssueSubscription unsubscribe user from issue
+func (c *Client) DeleteIssueSubscription(owner, repo string, index int64, user string) error {
+	if err := c.CheckServerVersionConstraint(">=1.11.0"); err != nil {
+		return err
+	}
+	_, err := c.getResponse("DELETE", fmt.Sprintf("/repos/%s/%s/issues/%d/subscriptions/%s", owner, repo, index, user), nil, nil)
+	return err
+}
+
+// IssueSubscribe subscribe current user to an issue
+func (c *Client) IssueSubscribe(owner, repo string, index int64) error {
+	u, err := c.GetMyUserInfo()
+	if err != nil {
+		return err
+	}
+	return c.AddIssueSubscription(owner, repo, index, u.UserName)
+}
+
+// IssueUnSubscribe unsubscribe current user from an issue
+func (c *Client) IssueUnSubscribe(owner, repo string, index int64) error {
+	u, err := c.GetMyUserInfo()
+	if err != nil {
+		return err
+	}
+	return c.DeleteIssueSubscription(owner, repo, index, u.UserName)
+}

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

@@ -37,6 +37,12 @@ func (c *Client) GetRepoTrackedTimes(owner, repo string) ([]*TrackedTime, error)
 	return times, c.getParsedResponse("GET", fmt.Sprintf("/repos/%s/%s/times", owner, repo), nil, nil, &times)
 }
 
+// ListTrackedTimes list tracked times of a single issue for a given repository
+func (c *Client) ListTrackedTimes(owner, repo string, index int64) ([]*TrackedTime, error) {
+	times := make([]*TrackedTime, 0, 10)
+	return times, c.getParsedResponse("GET", fmt.Sprintf("/repos/%s/%s/issues/%d/times", owner, repo, index), nil, nil, &times)
+}
+
 // GetMyTrackedTimes list tracked times of the current user
 func (c *Client) GetMyTrackedTimes() ([]*TrackedTime, error) {
 	times := make([]*TrackedTime, 0, 10)
@@ -64,8 +70,14 @@ func (c *Client) AddTime(owner, repo string, index int64, opt AddTimeOption) (*T
 		jsonHeader, bytes.NewReader(body), t)
 }
 
-// ListTrackedTimes get tracked times of one issue via issue id
-func (c *Client) ListTrackedTimes(owner, repo string, index int64) ([]*TrackedTime, error) {
-	times := make([]*TrackedTime, 0, 5)
-	return times, c.getParsedResponse("GET", fmt.Sprintf("/repos/%s/%s/issues/%d/times", owner, repo, index), nil, nil, &times)
+// ResetIssueTime reset tracked time of a single issue for a given repository
+func (c *Client) ResetIssueTime(owner, repo string, index int64) error {
+	_, err := c.getResponse("DELETE", fmt.Sprintf("/repos/%s/%s/issues/%d/times", owner, repo, index), nil, nil)
+	return err
+}
+
+// DeleteTime delete a specific tracked time by id of a single issue for a given repository
+func (c *Client) DeleteTime(owner, repo string, index, timeID int64) error {
+	_, err := c.getResponse("DELETE", fmt.Sprintf("/repos/%s/%s/issues/%d/times/%d", owner, repo, index, timeID), nil, nil)
+	return err
 }

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

@@ -1,13 +0,0 @@
-// Copyright 2015 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
-
-// ServerVersion returns the version of the server
-func (c *Client) ServerVersion() (string, error) {
-	var v = struct {
-		Version string `json:"version"`
-	}{}
-	return v.Version, c.getParsedResponse("GET", "/version", nil, nil, &v)
-}

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

@@ -9,6 +9,7 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
+	"net/url"
 	"time"
 )
 
@@ -58,18 +59,36 @@ type PullRequest struct {
 
 // ListPullRequestsOptions options for listing pull requests
 type ListPullRequestsOptions struct {
-	Page  int    `json:"page"`
+	Page int `json:"page"`
+	// open, closed, all
 	State string `json:"state"`
+	// oldest, recentupdate, leastupdate, mostcomment, leastcomment, priority
+	Sort      string `json:"sort"`
+	Milestone int64  `json:"milestone"`
 }
 
 // ListRepoPullRequests list PRs of one repository
 func (c *Client) ListRepoPullRequests(owner, repo string, opt ListPullRequestsOptions) ([]*PullRequest, error) {
-	body, err := json.Marshal(&opt)
-	if err != nil {
-		return nil, err
-	}
+	// declare variables
+	link, _ := url.Parse(fmt.Sprintf("/repos/%s/%s/pulls", owner, repo))
 	prs := make([]*PullRequest, 0, 10)
-	return prs, c.getParsedResponse("GET", fmt.Sprintf("/repos/%s/%s/pulls", owner, repo), jsonHeader, bytes.NewReader(body), &prs)
+	query := make(url.Values)
+	// add options to query
+	if opt.Page > 0 {
+		query.Add("page", fmt.Sprintf("%d", opt.Page))
+	}
+	if len(opt.State) > 0 {
+		query.Add("state", opt.State)
+	}
+	if len(opt.Sort) > 0 {
+		query.Add("sort", opt.Sort)
+	}
+	if opt.Milestone > 0 {
+		query.Add("milestone", fmt.Sprintf("%d", opt.Milestone))
+	}
+	link.RawQuery = query.Encode()
+	// request
+	return prs, c.getParsedResponse("GET", link.String(), jsonHeader, nil, &prs)
 }
 
 // GetPullRequest get information of one PR

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

@@ -1,4 +1,4 @@
-// Copyright 2016 The Gogs Authors. All rights reserved.
+// Copyright 2019 The Gitea Authors. All rights reserved.
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 

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

@@ -0,0 +1,57 @@
+// Copyright 2020 The Gitea 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 (
+	"fmt"
+
+	"github.com/hashicorp/go-version"
+)
+
+// ServerVersion returns the version of the server
+func (c *Client) ServerVersion() (string, error) {
+	var v = struct {
+		Version string `json:"version"`
+	}{}
+	return v.Version, c.getParsedResponse("GET", "/version", nil, nil, &v)
+}
+
+// CheckServerVersionConstraint validates that the login's server satisfies a
+// given version constraint such as ">= 1.11.0+dev"
+func (c *Client) CheckServerVersionConstraint(constraint string) error {
+	c.versionLock.RLock()
+	if c.serverVersion == nil {
+		c.versionLock.RUnlock()
+		if err := c.loadClientServerVersion(); err != nil {
+			return err
+		}
+	} else {
+		c.versionLock.RUnlock()
+	}
+
+	check, err := version.NewConstraint(constraint)
+	if err != nil {
+		return err
+	}
+	if !check.Check(c.serverVersion) {
+		return fmt.Errorf("gitea server at %s does not satisfy version constraint %s", c.url, constraint)
+	}
+	return nil
+}
+
+// loadClientServerVersion init the serverVersion variable
+func (c *Client) loadClientServerVersion() error {
+	c.versionLock.Lock()
+	defer c.versionLock.Unlock()
+
+	raw, err := c.ServerVersion()
+	if err != nil {
+		return err
+	}
+	if c.serverVersion, err = version.NewVersion(raw); err != nil {
+		return err
+	}
+	return nil
+}