Create "local git client" and "openai client"

OpenAIClient can be used to interact with OpenAI's API. Untested at the
moment (except with an API key that does not yet have perms)
Local git client splits the "git" functionality (e.g. make commits,
checkout branches, etc...) away from the "github" client

I also removed a lot of duplicate code for the different commands in cmd
And created a basic "local issue" command to send a "code change
request" to the llm, and receive a code change response. Eventually, I
want this to make the corresponding local git changes, for the user to
check.

TODO: github client should only be responsible for github-specific
actions, e.g. opening a PR or listing issues/comments

pullpal/common.go

@@ -3,6 +3,7 @@ package pullpal
 import (
 	"context"
 	"errors"
+	"fmt"
 	"io/ioutil"
 	"strings"
 
@@ -22,21 +23,29 @@ type PullPal struct {
 	ctx context.Context
 	log *zap.Logger
 
-	vcClient vc.VCClient
+	vcClient       vc.VCClient
+	localGitClient *vc.LocalGitClient
+	openAIClient   *llm.OpenAIClient
 }
 
 // NewPullPal creates a new "pull pal service", including setting up local version control and LLM integrations.
-func NewPullPal(ctx context.Context, log *zap.Logger, self vc.Author, repo vc.Repository) (*PullPal, error) {
+func NewPullPal(ctx context.Context, log *zap.Logger, self vc.Author, repo vc.Repository, openAIToken string) (*PullPal, error) {
 	ghClient, err := vc.NewGithubClient(ctx, log, self, repo)
 	if err != nil {
 		return nil, err
 	}
+	localGitClient, err := vc.NewLocalGitClient(self, repo)
+	if err != nil {
+		return nil, err
+	}
 
 	return &PullPal{
 		ctx: ctx,
 		log: log,
 
-		vcClient: ghClient,
+		vcClient:       ghClient,
+		localGitClient: localGitClient,
+		openAIClient:   llm.NewOpenAIClient(openAIToken),
 	}, nil
 }
 
@@ -180,3 +189,43 @@ func (p *PullPal) ListComments(changeID string, handles []string) ([]vc.Comment,
 
 	return comments, nil
 }
+
+func (p *PullPal) MakeLocalChange(issue vc.Issue) error {
+	// remove file list from issue body
+	// TODO do this better
+	parts := strings.Split(issue.Body, "Files:")
+	issue.Body = parts[0]
+
+	fileList := []string{}
+	if len(parts) > 1 {
+		fileList = strings.Split(parts[1], ",")
+	}
+
+	// get file contents from local git repository
+	files := []llm.File{}
+	for _, path := range fileList {
+		path = strings.TrimSpace(path)
+		nextFile, err := p.vcClient.GetLocalFile(path)
+		if err != nil {
+			return err
+		}
+		files = append(files, nextFile)
+	}
+
+	changeRequest := llm.CodeChangeRequest{
+		Subject: issue.Subject,
+		Body:    issue.Body,
+		IssueID: issue.ID,
+		Files:   files,
+	}
+
+	res, err := p.openAIClient.EvaluateCCR(p.ctx, changeRequest)
+	if err != nil {
+		return err
+	}
+
+	fmt.Println("response from openai")
+	fmt.Println(res)
+
+	return nil
+}