From 8b862f8b87b9f6d55c46100861e5ed0dfd26fb69 Mon Sep 17 00:00:00 2001
From: lisk77 <lisk77@protonmail.com>
Date: Tue, 19 Aug 2025 23:20:28 +0200
Subject: [PATCH] feat(cli): added init command to create a merk repository in
 the local directory

---
 src/main.c | 47 ++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 38 insertions(+), 9 deletions(-)

diff --git a/src/main.c b/src/main.c
index 2483906..71a38b5 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,15 +1,17 @@
-#include "action_list.h"
-#include "file.h"
-#include "myers.h"
-#include "utilities.h"
-// main.c
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #include <errno.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "action_list.h"
+#include "file.h"
+#include "myers.h"
+#include "utilities.h"
 
 static void usage(int exitcode) {
-    printf("usage: merk <command> [<args>]\n\n  diff     Displays the difference between the given two files\n");
+    printf("usage: merk <command> [<args>]\n\n  init     Initializes a repository in the current directory\n  diff     Displays the difference between the given two files\n");
     exit(exitcode);
 }
 
@@ -20,19 +22,45 @@ int main(int argc, char **argv) {
 
     const char* subcmd = argv[1];
 
-    if (strcmp(subcmd, "diff") != 0) {
+    if (strcmp(subcmd, "diff") != 0 && strcmp(subcmd, "init") != 0) {
         fprintf(stderr, "ERROR: Unknown subcommand: '%s'\n", subcmd);
         usage(2);
     }
 
-    if (strcmp(subcmd, "diff") == 0) {
+    // Initializes a merk repository in the current directory
+    if (strcmp(subcmd, "init") == 0) {
+        if (argc != 2) {
+            printf("ERROR: too many agruments given!\n");
+            printf("Usage: merk init");
+            exit(1);
+        }
+
+        if (mkdir(".merk", 0700) == 0) {
+            printf("Initialized merk repository\n");
+        }
+
+        if (errno == EEXIST) {
+            struct stat st;
+            if (stat(".merk", &st) == 0 && S_ISDIR(st.st_mode)) {
+                printf("This directory is already a merk repository\n");
+                return 0;
+            }
+        }
+
+        mkdir(".merk/files", 0700);
+        mkdir(".merk/trees", 0700);
+        mkdir(".merk/branches", 0700);
+    }
+
+    // Prints out a visual representation of the diff of the files provided
+    else if (strcmp(subcmd, "diff") == 0) {
         if (argc != 4) {
             printf("ERROR: too many/too little arguments given!\n");
             printf("Usage: merk diff <PATH> <PATH>");
             exit(1);
         }
 
-        File* file1; 
+        File* file1;
         switch (get_path_type(argv[2])) {
             case PT_FILE: file1 = new_file(argv[2]); break;
             case PT_DIR: file1 = NULL; printf("ERROR: first path is a directory and no file!"); break;
@@ -40,6 +68,7 @@ int main(int argc, char **argv) {
             default: file1 = NULL; printf("ERROR: unknown first path!");
         }
         if (!file1) exit(1);
+
         File* file2;
         switch (get_path_type(argv[3])) {
             case PT_FILE: file2 = new_file(argv[3]); break;