[#88148] devices: linux-client: Get metadata from file

Signed-off-by: Anna Roszkiewicz <[email protected]>

Author: anroszkiewicz

devices/linux-client/conf/config.go

@@ -39,6 +39,7 @@ const DEFAULT_FILESYSTEM_ENABLE = true
 const DEFAULT_FILESYSTEM_BASE_DIR = "/"
 const DEFAULT_VERIFICATION_SCRIPT_PATH = ""
 const DEFAULT_UPDATE_PROGRESS_ENABLE = true
+const DEFAULT_METADATA_FILE_PATH = ""
 
 type RDFMConfig struct {
 	// Path to the device type file
@@ -101,6 +102,9 @@ type RDFMConfig struct {
 
 	// Is reporting update progress enabled? Default: true
 	UpdateProgressEnable bool `json:",omitempty"`
+
+	// Path to the file with device metadata. Default: ""
+	MetadataFilePath string `json:",omitempty"`
 }
 
 var rdfmConfigInstance *RDFMConfig
@@ -152,6 +156,7 @@ func LoadConfig(mainConfigFile string, overlayConfigFile string) (*RDFMConfig, *
 		FileSystemBaseDir:         DEFAULT_FILESYSTEM_BASE_DIR,
 		VerificationScriptPath:    DEFAULT_VERIFICATION_SCRIPT_PATH,
 		UpdateProgressEnable:      DEFAULT_UPDATE_PROGRESS_ENABLE,
+		MetadataFilePath:          DEFAULT_METADATA_FILE_PATH,
 	}
 
 	// Load Mender config
@@ -227,3 +232,21 @@ func LoadTagsConfig(path string) ([]string, error) {
 
 	return config, nil
 }
+
+func LoadMetadataFile(path string) (map[string]interface{}, error) {
+	if _, err := os.Stat(path); errors.Is(err, os.ErrNotExist) {
+		return make(map[string]interface{}), errors.New(err.Error())
+	}
+
+	content, err := ioutil.ReadFile(path)
+	if err != nil {
+		return make(map[string]interface{}), errors.New(err.Error())
+	}
+
+	var metadata map[string]interface{}
+	if err := json.Unmarshal(content, &metadata); err != nil {
+		return make(map[string]interface{}), errors.New("Error parsing metadata file: " + err.Error())
+	}
+
+	return metadata, nil
+}

devices/linux-client/daemon/device.go

@@ -658,6 +658,11 @@ func (d *Device) authenticateDeviceWithServer() error {
 
 // collectMetadata gathers the RDFM metadata for this device.
 func (d *Device) collectMetadata() (map[string]interface{}, error) {
+	metadata, err := conf.LoadMetadataFile(d.rdfmCtx.RdfmConfig.MetadataFilePath)
+	if err != nil {
+		log.Warnln("Error collecting metadata: failed to get base metadata file:", err)
+	}
+
 	// make sure we have a MAC
 	if d.macAddr == "" {
 		mac, err := netUtils.GetUniqueId()
@@ -693,7 +698,10 @@ func (d *Device) collectMetadata() (map[string]interface{}, error) {
 	if len(tags) == 0 {
 		delete(m, "rdfm.software.tags")
 	}
-	return m, nil
+	for k, v := range m {
+		metadata[k] = v
+	}
+	return metadata, nil
 }
 
 func (d *Device) requestUpdateCheck() {