add cache clean

README.md

@@ -20,3 +20,20 @@ The above command runs the checks in the default namespace. If you want to speci
 Packaging of Qlik Sense on Kubernetes is done through a [Porter](https://porter.sh/) definition in the [Qlik Sense on Kubernetes configuration repository](https://github.com/qlik-oss/qliksense-k8s/blob/master/porter.yaml), the resulting bundle published on DockerHub as a [Cloud Natvie Application Bundle](https://cnab.io/) called [qliksense-cnab-bundle](https://hub.docker.com/r/qlik/qliksense-cnab-bundle).
 ### Versioning
 A version of [qliksense-cnab-bundle](https://hub.docker.com/r/qlik/qliksense-cnab-bundle) is published corresponding to an edge release. To get the latest edge release simply specify `qliksense-cnab-bundle:latest`
+
+## Known Issues
+
+if you see the error message like this
+
+```console
+invoking custom action about on Qliksense...
+Unable to find image 'qlik/qliksense-cnab-bundle@sha256:b41a3be13914daee9fb5b9b2d39e68aa99526600d9a99448b346992d6de48171' locally
+Error: 1 error occurred:
+	* failed to invoke the bundle: Error response from daemon: manifest for qlik/qliksense-cnab-bundle@sha256:b41a3be13914daee9fb5b9b2d39e68aa99526600d9a99448b346992d6de48171 not found: manifest unknown: manifest unknown
+```
+
+please issue this command
+
+```console
+qliksense cache clear
+```

cmd/qliksense/root.go

@@ -46,8 +46,8 @@ func installPorter() (string, error) {
 	var (
 		porterPermaLink = pkg.Version
 		//porterPermaLink                                          = "v0.3.0"
-		destination, homeDir, mixin, mixinOpts, qlikSenseHome, porterExe, ext string
-		mixinsVar                                                             = map[string]string{
+		destination, mixin, mixinOpts, qlikSenseHome, porterExe, ext string
+		mixinsVar                                                    = map[string]string{
 			"kustomize":  "-v 0.2-beta-3-0e19ca4 --url https://github.com/donmstewart/porter-kustomize/releases/download",
 			"qliksense":  "-v v0.14.0 --url https://github.com/qlik-oss/porter-qliksense/releases/download",
 			"exec":       "-v latest",
@@ -68,14 +68,8 @@ func installPorter() (string, error) {
 	if runtime.GOOS == "windows" {
 		porterExe = porterExe + ".exe"
 	}
-	if qlikSenseHome = os.Getenv(qlikSenseHomeVar); qlikSenseHome == "" {
-		if homeDir, err = homedir.Dir(); err != nil {
-			return "", err
-		}
-		if homeDir, err = homedir.Expand(homeDir); err != nil {
-			return "", err
-		}
-		qlikSenseHome = filepath.Join(homeDir, qlikSenseDirVar)
+	if qlikSenseHome, err = getQliksenseHomeDir(); err != nil {
+		return "", err
 	}
 	os.Setenv(porterHomeVar, qlikSenseHome)
 	//TODO: Check if porter version is one alreadu is one for this build
@@ -157,6 +151,30 @@ var versionCmd = &cobra.Command{
 	},
 }
 
+var cacheClearCmd = &cobra.Command{
+	Use:   "clear",
+	Short: "Clear the qliksense loacal cache",
+	Long:  `Remove the everything from ~/.qliksense/cache directory`,
+	Run: func(cmd *cobra.Command, args []string) {
+		qsHome, err := getQliksenseHomeDir()
+		if err != nil {
+			fmt.Println("Cannot find qliksense home diretory")
+			return
+		}
+		cacheDir := filepath.Join(qsHome, "cache")
+		if _, err = os.Stat(cacheDir); err != nil {
+			// cache directory not exist
+			fmt.Println("Cache Cleaned")
+			return
+		}
+		if err = os.RemoveAll(cacheDir); err != nil {
+			fmt.Println("cannot remove cache", err)
+			return
+		}
+		fmt.Println("Cache Cleaned")
+	},
+}
+
 func rootCmd(p *qliksense.Qliksense) *cobra.Command {
 	var (
 		cmd, porterCmd, alias *cobra.Command
@@ -185,6 +203,11 @@ func rootCmd(p *qliksense.Qliksense) *cobra.Command {
 	}
 	// add version command
 	cmd.AddCommand(versionCmd)
+	// add cache command
+	var cahcheCommand = &cobra.Command{Use: "cache", Short: "Perform operations on cache"}
+	cmd.AddCommand(cahcheCommand)
+	cahcheCommand.AddCommand(cacheClearCmd)
+
 	viper.SetEnvKeyReplacer(strings.NewReplacer("-", "_"))
 
 	return cmd
@@ -248,3 +271,19 @@ func copy(src, dst string) (int64, error) {
 	nBytes, err = io.Copy(destination, source)
 	return nBytes, err
 }
+
+func getQliksenseHomeDir() (string, error) {
+	var qlikSenseHome string
+	if qlikSenseHome = os.Getenv(qlikSenseHomeVar); qlikSenseHome == "" {
+		var homeDir string
+		var err error
+		if homeDir, err = homedir.Dir(); err != nil {
+			return "", err
+		}
+		if homeDir, err = homedir.Expand(homeDir); err != nil {
+			return "", err
+		}
+		qlikSenseHome = filepath.Join(homeDir, qlikSenseDirVar)
+	}
+	return qlikSenseHome, nil
+}