Adds vendor data

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

@@ -0,0 +1,101 @@
+// 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, *Response, error) {
+	var v = struct {
+		Version string `json:"version"`
+	}{}
+	resp, err := c.getParsedResponse("GET", "/version", nil, nil, &v)
+	return v.Version, resp, err
+}
+
+// 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 {
+	if err := c.loadServerVersion(); err != nil {
+		return err
+	}
+
+	check, err := version.NewConstraint(constraint)
+	if err != nil {
+		return err
+	}
+	if !check.Check(c.serverVersion) {
+		c.mutex.RLock()
+		url := c.url
+		c.mutex.RUnlock()
+		return fmt.Errorf("gitea server at %s does not satisfy version constraint %s", url, constraint)
+	}
+	return nil
+}
+
+// SetGiteaVersion configures the Client to assume the given version of the
+// Gitea server, instead of querying the server for it when initializing.
+// Use "" to skip all canonical ways in the SDK to check for versions
+func SetGiteaVersion(v string) ClientOption {
+	if v == "" {
+		return func(c *Client) error {
+			c.ignoreVersion = true
+			return nil
+		}
+	}
+	return func(c *Client) (err error) {
+		c.getVersionOnce.Do(func() {
+			c.serverVersion, err = version.NewVersion(v)
+			return
+		})
+		return
+	}
+}
+
+// predefined versions only have to be parsed by library once
+var (
+	version1_11_0, _ = version.NewVersion("1.11.0")
+	version1_12_0, _ = version.NewVersion("1.12.0")
+	version1_13_0, _ = version.NewVersion("1.13.0")
+	version1_14_0, _ = version.NewVersion("1.14.0")
+	version1_15_0, _ = version.NewVersion("1.15.0")
+)
+
+// checkServerVersionGreaterThanOrEqual is the canonical way in the SDK to check for versions for API compatibility reasons
+func (c *Client) checkServerVersionGreaterThanOrEqual(v *version.Version) error {
+	if c.ignoreVersion {
+		return nil
+	}
+	if err := c.loadServerVersion(); err != nil {
+		return err
+	}
+
+	if !c.serverVersion.GreaterThanOrEqual(v) {
+		c.mutex.RLock()
+		url := c.url
+		c.mutex.RUnlock()
+		return fmt.Errorf("gitea server at %s is older than %s", url, v.Original())
+	}
+	return nil
+}
+
+// loadServerVersion init the serverVersion variable
+func (c *Client) loadServerVersion() (err error) {
+	c.getVersionOnce.Do(func() {
+		raw, _, err2 := c.ServerVersion()
+		if err2 != nil {
+			err = err2
+			return
+		}
+		if c.serverVersion, err = version.NewVersion(raw); err != nil {
+			return
+		}
+	})
+	return
+}