codecrafters submit [skip ci]

2 files changed, 18 insertions, 1 deletions

diff --git a/src/builtins.zig b/src/builtins.zig
index ea34f19..07c278b 100644
--- a/src/builtins.zig
+++ b/src/builtins.zig
@@ -1,7 +1,7 @@
 const std = @import("std");
 const path = @import("path.zig");
 
-const BUILTINS = [_][]const u8{ "exit", "echo", "type", "pwd" };
+const BUILTINS = [_][]const u8{ "exit", "echo", "type", "pwd", "cd" };
 
 pub const CommandResult = enum {
     continue_loop,
@@ -33,6 +33,18 @@ pub fn executePwd(allocator: std.mem.Allocator, stdout: anytype) !void {
     try stdout.print("{s}\n", .{cwd});
 }
 
+pub fn executeCd(stdout: anytype, args: ?[]const u8) !void {
+    if (args == null or args.?.len == 0) {
+        try stdout.print("cd: missing argument\n", .{});
+        return;
+    }
+
+    const dir = std.mem.trim(u8, args.?, " ");
+    std.posix.chdir(dir) catch {
+        try stdout.print("cd: {s}: No such file or directory\n", .{dir});
+    };
+}
+
 pub fn executeType(allocator: std.mem.Allocator, stdout: anytype, args: ?[]const u8) !void {
     if (args) |a| {
         if (isBuiltin(a)) {
diff --git a/src/shell.zig b/src/shell.zig
index 2494fda..56ca991 100644
--- a/src/shell.zig
+++ b/src/shell.zig
@@ -22,6 +22,11 @@ pub fn executeCommand(
         return .continue_loop;
     }
 
+    if (std.mem.eql(u8, cmd_name, "cd")) {
+        try builtins.executeCd(stdout, args);
+        return .continue_loop;
+    }
+
     if (std.mem.eql(u8, cmd_name, "type")) {
         try builtins.executeType(allocator, stdout, args);
         return .continue_loop;