traefik/version/version.go

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package version
import (
"context"
"net/http"
"net/url"
"github.com/containous/mux"
"github.com/containous/traefik/log"
"github.com/google/go-github/github"
goversion "github.com/hashicorp/go-version"
"github.com/unrolled/render"
)
var (
// Version holds the current version of traefik.
Version = "dev"
// Codename holds the current version codename of traefik.
Codename = "cheddar" // beta cheese
// BuildDate holds the build date of traefik.
BuildDate = "I don't remember exactly"
)
// Handler expose version routes
type Handler struct{}
var (
templatesRenderer = render.New(render.Options{
Directory: "nowhere",
})
)
// AddRoutes add version routes on a router
func (v Handler) AddRoutes(router *mux.Router) {
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router.Methods(http.MethodGet).Path("/api/version").
HandlerFunc(func(response http.ResponseWriter, request *http.Request) {
v := struct {
Version string
Codename string
}{
Version: Version,
Codename: Codename,
}
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if err := templatesRenderer.JSON(response, http.StatusOK, v); err != nil {
log.Error(err)
}
})
}
// CheckNewVersion checks if a new version is available
func CheckNewVersion() {
if Version == "dev" {
return
}
client := github.NewClient(nil)
updateURL, err := url.Parse("https://update.traefik.io")
if err != nil {
log.Warnf("Error checking new version: %s", err)
return
}
client.BaseURL = updateURL
releases, resp, err := client.Repositories.ListReleases(context.Background(), "containous", "traefik", nil)
if err != nil {
log.Warnf("Error checking new version: %s", err)
return
}
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if resp.StatusCode != http.StatusOK {
log.Warnf("Error checking new version: status=%s", resp.Status)
return
}
currentVersion, err := goversion.NewVersion(Version)
if err != nil {
log.Warnf("Error checking new version: %s", err)
return
}
for _, release := range releases {
releaseVersion, err := goversion.NewVersion(*release.TagName)
if err != nil {
log.Warnf("Error checking new version: %s", err)
return
}
if len(currentVersion.Prerelease()) == 0 && len(releaseVersion.Prerelease()) > 0 {
continue
}
if releaseVersion.GreaterThan(currentVersion) {
log.Warnf("A new release has been found: %s. Please consider updating.", releaseVersion.String())
return
}
}
}