Use relative name for cache repo

cmd/kaniko-docker/main.go

@@ -143,6 +143,9 @@ func run(c *cli.Context) error {
 			Labels:        c.StringSlice("custom-labels"),
 			SkipTlsVerify: c.Bool("skip-tls-verify"),
 			SnapshotMode:  c.String("snapshot-mode"),
+			EnableCache:   c.Bool("enable-cache"),
+			CacheRepo:     c.String("cache-repo"),
+			CacheTTL:      c.Int("cache-ttl"),
 		},
 	}
 	return plugin.Exec()

cmd/kaniko-ecr/main.go

@@ -101,7 +101,7 @@ func main() {
 		},
 		cli.StringFlag{
 			Name:   "cache-repo",
-			Usage:  "Remote repository that will be used to store cached layers. enable-cache needs to be set to use this flag",
+			Usage:  "Remote repository that will be used to store cached layers. Cache repo should be present in specified registry. enable-cache needs to be set to use this flag",
 			EnvVar: "PLUGIN_CACHE_REPO",
 		},
 		cli.IntFlag{
@@ -132,6 +132,9 @@ func run(c *cli.Context) error {
 			Repo:         fmt.Sprintf("%s/%s", c.String("registry"), c.String("repo")),
 			Labels:       c.StringSlice("custom-labels"),
 			SnapshotMode: c.String("snapshot-mode"),
+			EnableCache:  c.Bool("enable-cache"),
+			CacheRepo:    fmt.Sprintf("%s/%s", c.String("registry"), c.String("cache-repo")),
+			CacheTTL:     c.Int("cache-ttl"),
 		},
 	}
 	return plugin.Exec()

cmd/kaniko-gcr/main.go

@@ -97,7 +97,7 @@ func main() {
 		},
 		cli.StringFlag{
 			Name:   "cache-repo",
-			Usage:  "Remote repository that will be used to store cached layers. enable-cache needs to be set to use this flag",
+			Usage:  "Remote repository that will be used to store cached layers. Cache repo should be present in specified registry. enable-cache needs to be set to use this flag",
 			EnvVar: "PLUGIN_CACHE_REPO",
 		},
 		cli.IntFlag{
@@ -132,6 +132,9 @@ func run(c *cli.Context) error {
 			Repo:         fmt.Sprintf("%s/%s", c.String("registry"), c.String("repo")),
 			Labels:       c.StringSlice("custom-labels"),
 			SnapshotMode: c.String("snapshot-mode"),
+			EnableCache:  c.Bool("enable-cache"),
+			CacheRepo:    fmt.Sprintf("%s/%s", c.String("registry"), c.String("cache-repo")),
+			CacheTTL:     c.Int("cache-ttl"),
 		},
 	}
 	return plugin.Exec()