refactor: move remaining api packages to core (#1731)

* core 1

* api/openai/files fix

* core 2 - core/config

* move over core api.go and tests to the start of core/http

* move over localai specific endpoints to core/http, begin the service/endpoint split there

* refactor big chunk on the plane

* refactor chunk 2 on plane, next step: port and modify changes to request.go

* easy fixes for request.go, major changes not done yet

* lintfix

* json tag lintfix?

* gitignore and .keep files

* strange fix attempt: rename the config dir?

core/startup/startup.go

@@ -0,0 +1,128 @@
+package startup
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/go-skynet/LocalAI/core/config"
+	"github.com/go-skynet/LocalAI/core/services"
+	"github.com/go-skynet/LocalAI/internal"
+	"github.com/go-skynet/LocalAI/pkg/assets"
+	"github.com/go-skynet/LocalAI/pkg/model"
+	pkgStartup "github.com/go-skynet/LocalAI/pkg/startup"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/log"
+)
+
+func Startup(opts ...config.AppOption) (*config.BackendConfigLoader, *model.ModelLoader, *config.ApplicationConfig, error) {
+	options := config.NewApplicationConfig(opts...)
+
+	zerolog.SetGlobalLevel(zerolog.InfoLevel)
+	if options.Debug {
+		zerolog.SetGlobalLevel(zerolog.DebugLevel)
+	}
+
+	log.Info().Msgf("Starting LocalAI using %d threads, with models path: %s", options.Threads, options.ModelPath)
+	log.Info().Msgf("LocalAI version: %s", internal.PrintableVersion())
+
+	// Make sure directories exists
+	if options.ModelPath == "" {
+		return nil, nil, nil, fmt.Errorf("options.ModelPath cannot be empty")
+	}
+	err := os.MkdirAll(options.ModelPath, 0755)
+	if err != nil {
+		return nil, nil, nil, fmt.Errorf("unable to create ModelPath: %q", err)
+	}
+	if options.ImageDir != "" {
+		err := os.MkdirAll(options.ImageDir, 0755)
+		if err != nil {
+			return nil, nil, nil, fmt.Errorf("unable to create ImageDir: %q", err)
+		}
+	}
+	if options.AudioDir != "" {
+		err := os.MkdirAll(options.AudioDir, 0755)
+		if err != nil {
+			return nil, nil, nil, fmt.Errorf("unable to create AudioDir: %q", err)
+		}
+	}
+	if options.UploadDir != "" {
+		err := os.MkdirAll(options.UploadDir, 0755)
+		if err != nil {
+			return nil, nil, nil, fmt.Errorf("unable to create UploadDir: %q", err)
+		}
+	}
+
+	//
+	pkgStartup.PreloadModelsConfigurations(options.ModelLibraryURL, options.ModelPath, options.ModelsURL...)
+
+	cl := config.NewBackendConfigLoader()
+	ml := model.NewModelLoader(options.ModelPath)
+
+	if err := cl.LoadBackendConfigsFromPath(options.ModelPath); err != nil {
+		log.Error().Msgf("error loading config files: %s", err.Error())
+	}
+
+	if options.ConfigFile != "" {
+		if err := cl.LoadBackendConfigFile(options.ConfigFile); err != nil {
+			log.Error().Msgf("error loading config file: %s", err.Error())
+		}
+	}
+
+	if err := cl.Preload(options.ModelPath); err != nil {
+		log.Error().Msgf("error downloading models: %s", err.Error())
+	}
+
+	if options.PreloadJSONModels != "" {
+		if err := services.ApplyGalleryFromString(options.ModelPath, options.PreloadJSONModels, cl, options.Galleries); err != nil {
+			return nil, nil, nil, err
+		}
+	}
+
+	if options.PreloadModelsFromPath != "" {
+		if err := services.ApplyGalleryFromFile(options.ModelPath, options.PreloadModelsFromPath, cl, options.Galleries); err != nil {
+			return nil, nil, nil, err
+		}
+	}
+
+	if options.Debug {
+		for _, v := range cl.ListBackendConfigs() {
+			cfg, _ := cl.GetBackendConfig(v)
+			log.Debug().Msgf("Model: %s (config: %+v)", v, cfg)
+		}
+	}
+
+	if options.AssetsDestination != "" {
+		// Extract files from the embedded FS
+		err := assets.ExtractFiles(options.BackendAssets, options.AssetsDestination)
+		log.Debug().Msgf("Extracting backend assets files to %s", options.AssetsDestination)
+		if err != nil {
+			log.Warn().Msgf("Failed extracting backend assets files: %s (might be required for some backends to work properly, like gpt4all)", err)
+		}
+	}
+
+	// turn off any process that was started by GRPC if the context is canceled
+	go func() {
+		<-options.Context.Done()
+		log.Debug().Msgf("Context canceled, shutting down")
+		ml.StopAllGRPC()
+	}()
+
+	if options.WatchDog {
+		wd := model.NewWatchDog(
+			ml,
+			options.WatchDogBusyTimeout,
+			options.WatchDogIdleTimeout,
+			options.WatchDogBusy,
+			options.WatchDogIdle)
+		ml.SetWatchDog(wd)
+		go wd.Run()
+		go func() {
+			<-options.Context.Done()
+			log.Debug().Msgf("Context canceled, shutting down")
+			wd.Shutdown()
+		}()
+	}
+
+	log.Info().Msg("core/startup process completed!")
+	return cl, ml, options, nil
+}