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/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
+}