refactor(git): replace go-git library with os/exec for staged diff retrieval

Author: m7medVision

internal/git/git.go

@@ -4,72 +4,29 @@ import (
 	"bytes"
 	"fmt"
 
-	"github.com/go-git/go-git/v5"
+	"os/exec"
 )
 
 // GetStagedDiff returns the diff of the staged files.
 func GetStagedDiff() (string, error) {
-	repo, err := git.PlainOpen(".")
+	cmd := exec.Command("git", "diff", "--cached")
+	var out bytes.Buffer
+	cmd.Stdout = &out
+	err := cmd.Run()
 	if err != nil {
-		return "", fmt.Errorf("error opening repository: %w", err)
+		return "", fmt.Errorf("error running git diff --cached: %w", err)
 	}
-
-	// Get the worktree to access the staging area
-	w, err := repo.Worktree()
-	if err != nil {
-		return "", fmt.Errorf("error getting worktree: %w", err)
-	}
-
-	// Get the status to see what's staged
-	status, err := w.Status()
-	if err != nil {
-		return "", fmt.Errorf("error getting status: %w", err)
-	}
-
-	// Create a buffer to store the diff
-	var diff bytes.Buffer
-
-	// For each staged file, get its diff
-	for path, change := range status {
-		if change.Staging != git.Unmodified {
-			// For a more complete implementation, we would compare the staged version
-			// with the HEAD version, but for now we'll just note that files are staged
-			diff.WriteString(fmt.Sprintf("Staged file: %s\n", path))
-		}
-	}
-
-	return diff.String(), nil
+	return out.String(), nil
 }
 
 // GetWorkingTreeDiff returns the diff of the working tree.
 func GetWorkingTreeDiff() (string, error) {
-	repo, err := git.PlainOpen(".")
+	cmd := exec.Command("git", "diff")
+	var out bytes.Buffer
+	cmd.Stdout = &out
+	err := cmd.Run()
 	if err != nil {
-		return "", fmt.Errorf("error opening repository: %w", err)
+		return "", fmt.Errorf("error running git diff: %w", err)
 	}
-
-	// Get the worktree
-	w, err := repo.Worktree()
-	if err != nil {
-		return "", fmt.Errorf("error getting worktree: %w", err)
-	}
-
-	// Get the status
-	status, err := w.Status()
-	if err != nil {
-		return "", fmt.Errorf("error getting status: %w", err)
-	}
-
-	// Create a buffer for the diff
-	var diff bytes.Buffer
-
-	// For each modified file, get its diff
-	for path, change := range status {
-		if change.Worktree != git.Unmodified {
-			// Note that files are modified
-			diff.WriteString(fmt.Sprintf("Modified file: %s\n", path))
-		}
-	}
-
-	return diff.String(), nil
+	return out.String(), nil
 }