fix(manifest): Sort index manifest entries after update

Signed-off-by: Alexander Jung <alex@unikraft.io>

go.mod

@@ -7,6 +7,7 @@ require (
 	github.com/AlecAivazis/survey/v2 v2.3.7
 	github.com/LastPossum/kamino v0.0.2
 	github.com/MakeNowJust/heredoc v1.0.0
+	github.com/Masterminds/semver v1.5.0
 	github.com/Masterminds/semver/v3 v3.3.1
 	github.com/acorn-io/baaah v0.0.0-20230522221318-afcc93619e30
 	github.com/anchore/stereoscope v0.0.11

go.sum

@@ -56,6 +56,8 @@ github.com/LastPossum/kamino v0.0.2 h1:Zry5lS7x7TTU1hzzk3Utnp+rX8kk/wWhuW52Ha9As
 github.com/LastPossum/kamino v0.0.2/go.mod h1:H8Qm+6DGeNOoXk9hHIOEAQWS9nbo0YwK32pC/7REsOE=
 github.com/MakeNowJust/heredoc v1.0.0 h1:cXCdzVdstXyiTqTvfqk9SDHpKNjxuom+DOlyEeQ4pzQ=
 github.com/MakeNowJust/heredoc v1.0.0/go.mod h1:mG5amYoWBHf8vpLOuehzbGGw0EHxpZZ6lCpQ4fNJ8LE=
+github.com/Masterminds/semver v1.5.0 h1:H65muMkzWKEuNDnfl9d70GUjFniHKHRbFPGBuZ3QEww=
+github.com/Masterminds/semver v1.5.0/go.mod h1:MB6lktGJrhw8PrUyiEoblNEGEQ+RzHPF078ddwwvV3Y=
 github.com/Masterminds/semver/v3 v3.3.1 h1:QtNSWtVZ3nBfk8mAOu/B6v7FMJ+NHTIgUPi7rj+4nv4=
 github.com/Masterminds/semver/v3 v3.3.1/go.mod h1:4V+yj/TJE1HU9XfppCwVMZq3I84lprf4nC11bSS5beM=
 github.com/Microsoft/go-winio v0.4.11/go.mod h1:VhR8bwka0BXejwEJY73c50VrPtXAaKcyvVC4A4RozmA=

manifest/manager.go

@@ -12,9 +12,11 @@ import (
 	"path/filepath"
 	"sort"
 	"strconv"
+	"strings"
 	"time"
 	"unicode"
 
+	"github.com/Masterminds/semver"
 	"github.com/gobwas/glob"
 	"github.com/sirupsen/logrus"
 
@@ -121,6 +123,43 @@ func (m *manifestManager) update(ctx context.Context) (*ManifestIndex, error) {
 		index.Manifests = append(index.Manifests, manifests...)
 	}
 
+	// Sort manifests by name
+	sort.Slice(index.Manifests, func(i, j int) bool {
+		return index.Manifests[i].Name < index.Manifests[j].Name
+	})
+
+	for i := range index.Manifests {
+		// Sort manifest versions by version
+		sort.Slice(index.Manifests[i].Versions, func(j, k int) bool {
+			jstr := index.Manifests[i].Versions[j].Version
+			if !strings.HasPrefix(jstr, "v") {
+				jstr = "v" + jstr
+			}
+
+			jSemVer, err := semver.NewVersion(jstr)
+			if err != nil {
+				return index.Manifests[i].Versions[j].Version < index.Manifests[i].Versions[k].Version
+			}
+
+			kstr := index.Manifests[i].Versions[j].Version
+			if !strings.HasPrefix(kstr, "v") {
+				kstr = "v" + kstr
+			}
+
+			kSemVer, err := semver.NewVersion(kstr)
+			if err != nil {
+				return index.Manifests[i].Versions[j].Version < index.Manifests[i].Versions[k].Version
+			}
+
+			return jSemVer.LessThan(kSemVer)
+		})
+
+		// Sort manifest channels by name
+		sort.Slice(index.Manifests[i].Channels, func(j, k int) bool {
+			return index.Manifests[i].Channels[j].Name < index.Manifests[i].Channels[k].Name
+		})
+	}
+
 	return index, nil
 }