codecrafters submit [skip ci]

2 files changed, 20 insertions, 1 deletions

diff --git a/src/builtins.zig b/src/builtins.zig
index a0d844b..8ce4a6f 100644
--- a/src/builtins.zig
+++ b/src/builtins.zig
@@ -168,3 +168,16 @@ pub fn executeHistoryRead(allocator: std.mem.Allocator, stdout: anytype, file_pa
         }
     }
 }
+
+pub fn executeHistoryWrite(stdout: anytype, file_path: []const u8, history_list: []const []const u8) !void {
+    const file = std.fs.cwd().createFile(file_path, .{}) catch {
+        try stdout.print("history: cannot write to {s}: error\n", .{file_path});
+        return;
+    };
+    defer file.close();
+
+    for (history_list) |cmd| {
+        try file.writeAll(cmd);
+        try file.writeAll("\n");
+    }
+}
diff --git a/src/shell.zig b/src/shell.zig
index fd72288..5a848af 100644
--- a/src/shell.zig
+++ b/src/shell.zig
@@ -24,7 +24,7 @@ pub fn executeCommand(
     if (std.mem.eql(u8, cmd_name, "exit")) return builtins.executeExit();
 
     if (std.mem.eql(u8, cmd_name, "history")) {
-        // Check if args contain -r flag for reading from file
+        // Check if args contain -r or -w flag for reading/writing file
         if (args) |a| {
             const trimmed = std.mem.trim(u8, a, " ");
             if (std.mem.startsWith(u8, trimmed, "-r ")) {
@@ -33,6 +33,12 @@ pub fn executeCommand(
                     try builtins.executeHistoryRead(allocator, stdout, file_path, history);
                 }
                 return .continue_loop;
+            } else if (std.mem.startsWith(u8, trimmed, "-w ")) {
+                const file_path = std.mem.trim(u8, trimmed[3..], " ");
+                if (file_path.len > 0) {
+                    try builtins.executeHistoryWrite(stdout, file_path, history.items);
+                }
+                return .continue_loop;
             }
         }