feat(prepare): allow to specify additional files to download (#1526)

api/config/config.go

@@ -52,6 +52,14 @@ type Config struct {
 	// CUDA
 	// Explicitly enable CUDA or not (some backends might need it)
 	CUDA bool `yaml:"cuda"`
+
+	DownloadFiles []File `yaml:"download_files"`
+}
+
+type File struct {
+	Filename string `yaml:"filename" json:"filename"`
+	SHA256   string `yaml:"sha256" json:"sha256"`
+	URI      string `yaml:"uri" json:"uri"`
 }
 
 type VallE struct {
@@ -272,10 +280,29 @@ func (cm *ConfigLoader) Preload(modelPath string) error {
 	cm.Lock()
 	defer cm.Unlock()
 
+	status := func(fileName, current, total string, percent float64) {
+		utils.DisplayDownloadFunction(fileName, current, total, percent)
+	}
+
 	log.Info().Msgf("Preloading models from %s", modelPath)
 
 	for i, config := range cm.configs {
 
+		// Download files and verify their SHA
+		for _, file := range config.DownloadFiles {
+			log.Debug().Msgf("Checking %q exists and matches SHA", file.Filename)
+
+			if err := utils.VerifyPath(file.Filename, modelPath); err != nil {
+				return err
+			}
+			// Create file path
+			filePath := filepath.Join(modelPath, file.Filename)
+
+			if err := utils.DownloadFile(file.URI, filePath, file.SHA256, status); err != nil {
+				return err
+			}
+		}
+
 		modelURL := config.PredictionOptions.Model
 		modelURL = utils.ConvertURL(modelURL)
 
@@ -285,9 +312,7 @@ func (cm *ConfigLoader) Preload(modelPath string) error {
 
 			// check if file exists
 			if _, err := os.Stat(filepath.Join(modelPath, md5Name)); errors.Is(err, os.ErrNotExist) {
-				err := utils.DownloadFile(modelURL, filepath.Join(modelPath, md5Name), "", func(fileName, current, total string, percent float64) {
-					utils.DisplayDownloadFunction(fileName, current, total, percent)
-				})
+				err := utils.DownloadFile(modelURL, filepath.Join(modelPath, md5Name), "", status)
 				if err != nil {
 					return err
 				}