forked from redhat-developer/odo
/
notify.go
59 lines (48 loc) · 1.67 KB
/
notify.go
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package notify
import (
"io/ioutil"
"net/http"
"strings"
"github.com/blang/semver"
"github.com/pkg/errors"
)
const (
// VersionFetchURL is the URL to fetch latest version number
VersionFetchURL = "https://raw.githubusercontent.com/openshift/odo/master/build/VERSION"
// InstallScriptURL is URL of the installation shell script
InstallScriptURL = "https://raw.githubusercontent.com/openshift/odo/master/scripts/installer.sh"
)
// getLatestReleaseTag polls odo's upstream GitHub repository to get the
// tag of the latest release
func getLatestReleaseTag() (string, error) {
resp, err := http.Get(VersionFetchURL)
if err != nil {
return "", errors.Wrap(err, "error getting latest release")
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return "", errors.Wrap(err, "error getting latest release")
}
return strings.TrimSuffix(string(body), "\n"), nil
}
// CheckLatestReleaseTag returns the latest release tag if a newer latest
// release is available, else returns an empty string
func CheckLatestReleaseTag(currentVersion string) (string, error) {
currentSemver, err := semver.Make(strings.TrimPrefix(currentVersion, "v"))
if err != nil {
return "", errors.Wrapf(err, "unable to make semver from the current version: %v", currentVersion)
}
latestTag, err := getLatestReleaseTag()
if err != nil {
return "", errors.Wrap(err, "unable to get latest release tag")
}
latestSemver, err := semver.Make(strings.TrimPrefix(latestTag, "v"))
if err != nil {
return "", errors.Wrapf(err, "unable to make semver from the latest release tag: %v", latestTag)
}
if currentSemver.LT(latestSemver) {
return latestTag, nil
}
return "", nil
}