feat: add -a command on the ask subcommand to pass in a suffix

ask_cmd.go

@@ -3,6 +3,8 @@ package main
 import (
 	"context"
 	"fmt"
+	"io"
+	"os"
 	"strings"
 
 	"github.com/PullRequestInc/go-gpt3"
@@ -30,17 +32,48 @@ type askCmd struct {
 	Temperature float32  `default:"0.7"`
 	Bash        bool     `arg:"--bash" help:"output only valid bash"`
 	Model       string   `arg:"--model,-m" help:"set openai model"`
+	Attach      []string `arg:"--attach,-a" help:"attach additional files at the end of the message"`
 }
 
-func (args *askCmd) messages() []gpt3.ChatCompletionRequestMessage {
+func (args *askCmd) buildContent(ctx context.Context) (string, error) {
+	var sb strings.Builder
+	for idx, q := range args.Question {
+		if idx != 0 {
+			sb.WriteRune(' ')
+		}
+		sb.WriteString(q)
+	}
+
+	if len(args.Question) > 0 &&
+		!strings.HasSuffix(args.Question[len(args.Question)-1], "\n") {
+		sb.WriteRune('\n')
+	}
+
+	for _, a := range args.Attach {
+		sb.WriteRune('\n')
+		file, err := os.Open(a)
+		if err != nil {
+			return "", err
+		}
+		defer file.Close()
+		_, err = io.Copy(&sb, file)
+		if err != nil {
+			return "", err
+		}
+	}
+
+	return sb.String(), nil
+}
+
+func (args *askCmd) messages(content string) []gpt3.ChatCompletionRequestMessage {
 	if args.Bash {
 		return []gpt3.ChatCompletionRequestMessage{
 			{Role: "system", Content: systemMessage},
-			{Role: "user", Content: strings.Join(args.Question, " ")},
+			{Role: "user", Content: content},
 		}
 	} else {
 		return []gpt3.ChatCompletionRequestMessage{
-			{Role: "system", Content: strings.Join(args.Question, " ")},
+			{Role: "system", Content: content},
 		}
 	}
 
@@ -54,8 +87,12 @@ func (args *askCmd) Execute(ctx context.Context, config *config) error {
 	client := config.Client()
 
 	lastMessage := ""
-	err := client.ChatCompletionStream(ctx, gpt3.ChatCompletionRequest{
-		Messages:    args.messages(),
+	content, err := args.buildContent(ctx)
+	if err != nil {
+		return fmt.Errorf("cannot build message: %w", err)
+	}
+	err = client.ChatCompletionStream(ctx, gpt3.ChatCompletionRequest{
+		Messages:    args.messages(content),
 		MaxTokens:   args.MaxTokens,
 		Temperature: &args.Temperature,
 		Stream:      true,