feat!: add support for model configuration and persistent history sto…

…rage

README.md

@@ -8,41 +8,90 @@ A command-line interface (CLI) for [Google Gemini](https://deepmind.google/techn
 Google Gemini is a family of multimodal artificial intelligence (AI) large language models that have
 capabilities in language, audio, code and video understanding.
 
-The current version only supports multi-turn conversations (chat), using the `gemini-pro` model.
+This application offers a command-line interface for interacting with various generative models through
+multi-turn chat. Model selection is controlled via [system command](#system-commands) inputs.
 
 ## Installation
-Choose a binary from the [releases](https://github.com/reugn/gemini-cli/releases).
+Choose a binary from [releases](https://github.com/reugn/gemini-cli/releases).
 
 ### Build from Source
 Download and [install Go](https://golang.org/doc/install).
 
 Install the application:
-
 ```sh
 go install github.com/reugn/gemini-cli/cmd/gemini@latest
 ```
 
 See the [go install](https://go.dev/ref/mod#go-install) instructions for more information about the command.
 
 ## Usage
+> [!NOTE]
+> For information on the available regions for the Gemini API and Google AI Studio,
+> see [here](https://ai.google.dev/available_regions#available_regions).
 
 ### API key
 To use `gemini-cli`, you'll need an API key set in the `GEMINI_API_KEY` environment variable.
 If you don't already have one, create a key in [Google AI Studio](https://makersuite.google.com/app/apikey).
 
-> [!NOTE]
-> For information on the available regions for the Gemini API and Google AI Studio, see [here](https://ai.google.dev/available_regions#available_regions).
+To set the environment variable in the terminal:
+```console
+export GEMINI_API_KEY=<your_api_key>
+```
 
 ### System commands
 The system chat message must begin with an exclamation mark and is used for internal operations.
 A short list of supported system commands:
 
-| Command | Description                                          |
-|---------|------------------------------------------------------|
-| !q      | Quit the application                                 |
-| !p      | Delete the history used as chat context by the model |
-| !i      | Toggle input mode (single-line <-> multi-line)       |
-| !m      | Select generative model                              |
+| Command | Description                                        |
+|---------|----------------------------------------------------|
+| !q      | Quit the application                               |
+| !p      | Select the system prompt for the chat <sup>1</sup> |
+| !i      | Toggle input mode (single-line <-> multi-line)     |
+| !m      | Select a model operation <sup>2</sup>              |
+| !h      | Select a history operation <sup>3</sup>            |
+
+<sup>1</sup> System instruction (also known as "system prompt") is a more forceful prompt to the model.
+The model will adhere the instructions more strongly than if they appeared in a normal prompt.
+The system instructions must be specified by the user in the [configuration file](#configuration-file).
+
+<sup>2</sup> Model operations:
+* Select a generative model from the list of available models
+* Show the selected model information
+
+<sup>3</sup> History operations:
+* Clear the chat history
+* Store the chat history to the configuration file
+* Load a chat history record from the configuration file
+* Delete all history records from the configuration file
+
+### Configuration file
+The application uses a configuration file to store generative model settings and chat history. This file is optional.
+If it doesn't exist, the application will attempt to create it using default values. You can use the
+[config flag](#cli-help) to specify the location of the configuration file.
+
+An example of basic configuration:
+```json
+{
+  "SystemPrompts": {
+    "Software Engineer": "You are an experienced software engineer.",
+    "Technical Writer": "Act as a tech writer. I will provide you with the basic steps of an app functionality, and you will come up with an engaging article on how to do those steps."
+  },
+  "SafetySettings": [
+    {
+      "Category": 7,
+      "Threshold": 1
+    },
+    {
+      "Category": 10,
+      "Threshold": 1
+    }
+  ],
+  "History": {
+  }
+}
+```
+Upon user request, the `History` map will be populated with records. Note that the chat history is stored in plain
+text format. See [history operations](#system-commands) for details.
 
 ### CLI help
 ```console
@@ -53,13 +102,13 @@ Usage:
    [flags]
 
 Flags:
-  -f, --format         render markdown-formatted response (default true)
-  -h, --help           help for this command
-  -m, --model string   generative model name (default "gemini-pro")
-      --multiline      read input as a multi-line string
-  -s, --style string   markdown format style (ascii, dark, light, pink, notty, dracula) (default "auto")
-  -t, --term string    multi-line input terminator (default "$")
-  -v, --version        version for this command
+  -c, --config string   path to configuration file in JSON format (default "gemini_cli_config.json")
+  -h, --help            help for this command
+  -m, --model string    generative model name (default "gemini-pro")
+      --multiline       read input as a multi-line string
+  -s, --style string    markdown format style (ascii, dark, light, pink, notty, dracula) (default "auto")
+  -t, --term string     multi-line input terminator (default "$")
+  -v, --version         version for this command
 ```
 
 ## License

cmd/gemini/.gitignore

@@ -1 +1,2 @@
 gemini
+*.json

cmd/gemini/main.go

@@ -6,13 +6,15 @@ import (
 	"os/user"
 
 	"github.com/reugn/gemini-cli/gemini"
-	"github.com/reugn/gemini-cli/internal/cli"
+	"github.com/reugn/gemini-cli/internal/chat"
+	"github.com/reugn/gemini-cli/internal/config"
 	"github.com/spf13/cobra"
 )
 
 const (
-	version   = "0.3.1"
-	apiKeyEnv = "GEMINI_API_KEY" //nolint:gosec
+	version           = "0.3.1"
+	apiKeyEnv         = "GEMINI_API_KEY" //nolint:gosec
+	defaultConfigPath = "gemini_cli_config.json"
 )
 
 func run() int {
@@ -21,26 +23,39 @@ func run() int {
 		Version: version,
 	}
 
-	var opts cli.ChatOpts
-	rootCmd.Flags().StringVarP(&opts.Model, "model", "m", gemini.DefaultModel, "generative model name")
-	rootCmd.Flags().BoolVarP(&opts.Format, "format", "f", true, "render markdown-formatted response")
+	var opts chat.Opts
+	var configPath string
+	rootCmd.Flags().StringVarP(&opts.GenerativeModel, "model", "m", gemini.DefaultModel,
+		"generative model name")
 	rootCmd.Flags().StringVarP(&opts.Style, "style", "s", "auto",
 		"markdown format style (ascii, dark, light, pink, notty, dracula)")
-	rootCmd.Flags().BoolVar(&opts.Multiline, "multiline", false, "read input as a multi-line string")
-	rootCmd.Flags().StringVarP(&opts.Terminator, "term", "t", "$", "multi-line input terminator")
+	rootCmd.Flags().BoolVar(&opts.Multiline, "multiline", false,
+		"read input as a multi-line string")
+	rootCmd.Flags().StringVarP(&opts.LineTerminator, "term", "t", "$",
+		"multi-line input terminator")
+	rootCmd.Flags().StringVarP(&configPath, "config", "c", defaultConfigPath,
+		"path to configuration file in JSON format")
 
 	rootCmd.RunE = func(_ *cobra.Command, _ []string) error {
+		configuration, err := config.NewConfiguration(configPath)
+		if err != nil {
+			return err
+		}
+
+		modelBuilder := gemini.NewGenerativeModelBuilder().
+			WithName(opts.GenerativeModel).
+			WithSafetySettings(configuration.Data.SafetySettings)
 		apiKey := os.Getenv(apiKeyEnv)
-		chatSession, err := gemini.NewChatSession(context.Background(), opts.Model, apiKey)
+		chatSession, err := gemini.NewChatSession(context.Background(), modelBuilder, apiKey)
 		if err != nil {
 			return err
 		}
 
-		chat, err := cli.NewChat(getCurrentUser(), chatSession, &opts)
+		chatHandler, err := chat.New(getCurrentUser(), chatSession, configuration, os.Stdout, &opts)
 		if err != nil {
 			return err
 		}
-		chat.StartChat()
+		chatHandler.Start()
 
 		return chatSession.Close()
 	}

gemini/chat_session.go

@@ -2,6 +2,8 @@ package gemini
 
 import (
 	"context"
+	"encoding/json"
+	"fmt"
 	"sync"
 
 	"github.com/google/generative-ai-go/genai"
@@ -15,23 +17,28 @@ type ChatSession struct {
 	ctx context.Context
 
 	client  *genai.Client
+	model   *genai.GenerativeModel
 	session *genai.ChatSession
 
 	loadModels sync.Once
 	models     []string
 }
 
 // NewChatSession returns a new [ChatSession].
-func NewChatSession(ctx context.Context, model, apiKey string) (*ChatSession, error) {
+func NewChatSession(
+	ctx context.Context, modelBuilder *GenerativeModelBuilder, apiKey string,
+) (*ChatSession, error) {
 	client, err := genai.NewClient(ctx, option.WithAPIKey(apiKey))
 	if err != nil {
 		return nil, err
 	}
 
+	generativeModel := modelBuilder.build(client)
 	return &ChatSession{
 		ctx:     ctx,
 		client:  client,
-		session: client.GenerativeModel(model).StartChat(),
+		model:   generativeModel,
+		session: generativeModel.StartChat(),
 	}, nil
 }
 
@@ -45,14 +52,33 @@ func (c *ChatSession) SendMessageStream(input string) *genai.GenerateContentResp
 	return c.session.SendMessageStream(c.ctx, genai.Text(input))
 }
 
-// SetGenerativeModel sets the name of the generative model for the chat.
-// It preserves the history from the previous chat session.
-func (c *ChatSession) SetGenerativeModel(model string) {
+// SetModel sets a new generative model configured with the builder and starts
+// a new chat session. It preserves the history of the previous chat session.
+func (c *ChatSession) SetModel(modelBuilder *GenerativeModelBuilder) {
 	history := c.session.History
-	c.session = c.client.GenerativeModel(model).StartChat()
+	c.model = modelBuilder.build(c.client)
+	c.session = c.model.StartChat()
 	c.session.History = history
 }
 
+// CopyModelBuilder returns a copy builder for the chat generative model.
+func (c *ChatSession) CopyModelBuilder() *GenerativeModelBuilder {
+	return newCopyGenerativeModelBuilder(c.model)
+}
+
+// ModelInfo returns information about the chat generative model in JSON format.
+func (c *ChatSession) ModelInfo() (string, error) {
+	modelInfo, err := c.model.Info(c.ctx)
+	if err != nil {
+		return "", err
+	}
+	encoded, err := json.MarshalIndent(modelInfo, "", "  ")
+	if err != nil {
+		return "", fmt.Errorf("error encoding model info: %w", err)
+	}
+	return string(encoded), nil
+}
+
 // ListModels returns a list of the supported generative model names.
 func (c *ChatSession) ListModels() []string {
 	c.loadModels.Do(func() {
@@ -69,7 +95,17 @@ func (c *ChatSession) ListModels() []string {
 	return c.models
 }
 
-// ClearHistory clears chat history.
+// GetHistory returns the chat session history.
+func (c *ChatSession) GetHistory() []*genai.Content {
+	return c.session.History
+}
+
+// SetHistory sets the chat session history.
+func (c *ChatSession) SetHistory(content []*genai.Content) {
+	c.session.History = content
+}
+
+// ClearHistory clears the chat session history.
 func (c *ChatSession) ClearHistory() {
 	c.session.History = make([]*genai.Content, 0)
 }