From 29010b2a1b434002a7e9e60516b8fcf7f63f1807 Mon Sep 17 00:00:00 2001
From: Mikhail Klementev <blame@dumpstack.io>
Date: Sat, 13 May 2023 19:48:01 +0000
Subject: [PATCH] feat: support getting cached kernels

---
 distro/debian/kernel.go | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/distro/debian/kernel.go b/distro/debian/kernel.go
index e083339..36f41d9 100644
--- a/distro/debian/kernel.go
+++ b/distro/debian/kernel.go
@@ -103,6 +103,38 @@ func GetDebianKernel(version string) (dk DebianKernel, err error) {
 	return
 }
 
+// GetCachedKernel by deb package name
+func GetCachedKernel(deb string) (dk DebianKernel, err error) {
+	c, err := NewCache(CachePath)
+	if err != nil {
+		log.Error().Err(err).Msg("cache")
+		return
+	}
+	defer c.Close()
+
+	versions, err := c.GetVersions()
+	if err != nil {
+		log.Error().Err(err).Msg("get source package versions from cache")
+		return
+	}
+
+	for _, version := range versions {
+		var tmpdk DebianKernel
+		tmpdk, err = c.Get(version)
+		if err != nil {
+			continue
+		}
+
+		switch deb {
+		case tmpdk.Image.Deb.Name, tmpdk.Headers.Deb.Name:
+			dk = tmpdk
+			return
+		}
+	}
+
+	return
+}
+
 func GetKernels(c *Cache, refetchDays int) (kernels []DebianKernel, err error) {
 	versions, err := snapshot.SourcePackageVersions("linux")
 	if err != nil {
@@ -110,6 +142,12 @@ func GetKernels(c *Cache, refetchDays int) (kernels []DebianKernel, err error) {
 		return
 	}
 
+	err = c.PutVersions(versions)
+	if err != nil {
+		log.Error().Err(err).Msg("put source package versions to cache")
+		return
+	}
+
 	for i, version := range versions {
 		slog := log.With().Str("version", version).Logger()
 		slog.Debug().Msgf("%03d/%03d", i, len(versions))