feat: Add '/version' endpoint and display it in the CLI (#679)

Makefile

@@ -19,7 +19,13 @@ CUDA_LIBPATH?=/usr/local/cuda/lib64/
 STABLEDIFFUSION_VERSION?=d89260f598afb809279bc72aa0107b4292587632
 GO_TAGS?=
 BUILD_ID?=git
+
+VERSION?=$(shell git describe --always --tags --dirty || echo "dev" )
+# go tool nm ./local-ai | grep Commit
 LD_FLAGS?=
+override LD_FLAGS += -X "github.com/go-skynet/LocalAI/internal.Version=$(VERSION)"
+override LD_FLAGS += -X "github.com/go-skynet/LocalAI/internal.Commit=$(shell git rev-parse HEAD)"
+
 OPTIONAL_TARGETS?=
 ESPEAK_DATA?=
 
@@ -244,6 +250,8 @@ build: prepare ## Build the project
 	$(info ${GREEN}I local-ai build info:${RESET})
 	$(info ${GREEN}I BUILD_TYPE: ${YELLOW}$(BUILD_TYPE)${RESET})
 	$(info ${GREEN}I GO_TAGS: ${YELLOW}$(GO_TAGS)${RESET})
+	$(info ${GREEN}I LD_FLAGS: ${YELLOW}$(LD_FLAGS)${RESET})
+
 	CGO_LDFLAGS="$(CGO_LDFLAGS)" C_INCLUDE_PATH=${C_INCLUDE_PATH} LIBRARY_PATH=${LIBRARY_PATH} $(GOCMD) build -ldflags "$(LD_FLAGS)" -tags "$(GO_TAGS)" -o $(BINARY_NAME) ./
 ifeq ($(BUILD_TYPE),metal)
 	cp go-llama/build/bin/ggml-metal.metal .

api/api.go

@@ -3,6 +3,7 @@ package api
 import (
 	"errors"
 
+	"github.com/go-skynet/LocalAI/internal"
 	"github.com/go-skynet/LocalAI/pkg/assets"
 	"github.com/gofiber/fiber/v2"
 	"github.com/gofiber/fiber/v2/middleware/cors"
@@ -105,6 +106,12 @@ func App(opts ...AppOption) (*fiber.App, error) {
 	applier := newGalleryApplier(options.loader.ModelPath)
 	applier.start(options.context, cm)
 
+	app.Get("/version", func(c *fiber.Ctx) error {
+		return c.JSON(struct {
+			Version string `json:"version"`
+		}{Version: internal.PrintableVersion()})
+	})
+
 	app.Post("/models/apply", applyModelGallery(options.loader.ModelPath, cm, applier.C, options.galleries))
 	app.Get("/models/available", listModelFromGallery(options.galleries, options.loader.ModelPath))
 	app.Get("/models/jobs/:uuid", getOpStatus(applier))

internal/version.go

@@ -0,0 +1,10 @@
+package internal
+
+import "fmt"
+
+var Version = ""
+var Commit = ""
+
+func PrintableVersion() string {
+	return fmt.Sprintf("LocalAI %s (%s)", Version, Commit)
+}

main.go

@@ -7,6 +7,7 @@ import (
 	"path/filepath"
 
 	api "github.com/go-skynet/LocalAI/api"
+	"github.com/go-skynet/LocalAI/internal"
 	"github.com/go-skynet/LocalAI/pkg/gallery"
 	model "github.com/go-skynet/LocalAI/pkg/model"
 	"github.com/rs/zerolog"
@@ -24,8 +25,9 @@ func main() {
 	}
 
 	app := &cli.App{
-		Name:  "LocalAI",
-		Usage: "OpenAI compatible API for running LLaMA/GPT models locally on CPU with consumer grade hardware.",
+		Name:    "LocalAI",
+		Version: internal.PrintableVersion(),
+		Usage:   "OpenAI compatible API for running LLaMA/GPT models locally on CPU with consumer grade hardware.",
 		Flags: []cli.Flag{
 			&cli.BoolFlag{
 				Name:    "f16",