codecrafters submit [skip ci]

1 files changed, 34 insertions, 0 deletions

diff --git a/cmd/mygit/main.go b/cmd/mygit/main.go
index 2abec34..bbdb4a9 100644
--- a/cmd/mygit/main.go
+++ b/cmd/mygit/main.go
@@ -1,7 +1,10 @@
 package main
 
 import (
+	"bytes"
+	"compress/zlib"
 	"fmt"
+	"io"
 	"os"
 )
 
@@ -26,6 +29,37 @@ func main() {
 
 		fmt.Println("Initialized git directory")
 
+	case "cat-file":
+		object := os.Args[3]
+		filePath := fmt.Sprintf(".git/objects/%s/%s", object[:2], object[2:])
+		file, err := os.Open(filePath)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Error opening file: %s\n", err)
+			os.Exit(1)
+		}
+		defer file.Close()
+
+		r, err := zlib.NewReader(file)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Error creating zlib reader: %s\n", err)
+			os.Exit(1)
+		}
+		defer r.Close()
+
+		w, err := io.ReadAll(r)
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "Error reading zlib data: %s\n", err)
+			os.Exit(1)
+		}
+
+		parts := bytes.Split(w, []byte("\x00"))
+		if len(parts) < 2 {
+			fmt.Fprintf(os.Stderr, "Invalid zlib data\n")
+			os.Exit(1)
+		}
+
+		fmt.Print(string(parts[1]))
+
 	default:
 		fmt.Fprintf(os.Stderr, "Unknown command %s\n", command)
 		os.Exit(1)