mirror of
https://github.com/cloudnativelabs/kube-router.git
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95ac4b5a3e
This gives us an easy to use way to communicate with users for specific version periods. Fixes: #1555
69 lines
1.7 KiB
Go
69 lines
1.7 KiB
Go
package version
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import (
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"fmt"
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"os"
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"runtime"
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"github.com/hashicorp/go-version"
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"k8s.io/klog/v2"
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)
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type versionMessage struct {
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minVersionInclusive string
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maxVersionExclusive string
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message string
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}
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// Version and BuildDate are injected at build time via ldflags
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var (
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BuildDate string
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Version string
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msgVersionArr = []versionMessage{
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{
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minVersionInclusive: "v2.0.0",
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maxVersionExclusive: "v2.1.0",
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message: "Version v2.X introduces backward compatibility breaking changes, the kube-router project " +
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"recommends that you read the release notes carefully before deploying: " +
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"https://github.com/cloudnativelabs/kube-router/releases/tag/v2.0.0",
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},
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}
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)
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func (ver versionMessage) versionApplicable(testVerStr string) bool {
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minVer, err1 := version.NewVersion(ver.minVersionInclusive)
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maxVer, err2 := version.NewVersion(ver.maxVersionExclusive)
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testVer, err3 := version.NewVersion(testVerStr)
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// When in doubt return false
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if err1 != nil || err2 != nil || err3 != nil {
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klog.Warningf("encountered an error while trying to parse version numbers: %v - %v - %v", err1, err2, err3)
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return false
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}
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return testVer.GreaterThanOrEqual(minVer) && testVer.LessThan(maxVer)
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}
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func PrintVersion(logOutput bool) {
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output := fmt.Sprintf("Running %v version %s, built on %s, %s\n", os.Args[0], Version, BuildDate, runtime.Version())
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outputToStream(output, logOutput)
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}
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func PrintVersionMessages(logOutput bool) {
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for _, verMsg := range msgVersionArr {
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if verMsg.versionApplicable(Version) {
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outputToStream(verMsg.message, logOutput)
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}
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}
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}
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func outputToStream(output string, logOutput bool) {
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if !logOutput {
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_, _ = fmt.Fprintf(os.Stderr, "%s", output)
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} else {
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klog.Info(output)
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}
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}
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