Fixes for passing in sqlite file name

src/http_handler.zig

@@ -14,18 +14,47 @@ const note = @import("routes/shared_note.zig");
 
 const Db = @import("db/db.zig").Db;
 
-var db: Db = undefined;
+var db: ?Db = null;
 
 pub fn getDb() *Db {
-    return &db;
+    return &db.?;
 }
 
 pub fn startHttpServer() !void {
     var gpa = std.heap.GeneralPurposeAllocator(.{}){};
     const allocator = gpa.allocator();
 
-    db = try Db.init(allocator, null);
-    defer db.deinit();
+    // db = try Db.init(allocator, null);
+    // defer db.deinit();
+    var args = try std.process.argsWithAllocator(allocator);
+
+    // skip program name
+    _ = args.skip();
+    while (args.next()) |arg| {
+        if (std.mem.eql(u8, arg, "--db_path")) {
+            const path = args.next();
+            // std.debug.print("Got path: {any}", .{path});
+            if (path) |db_path| {
+                db = try Db.init(allocator, db_path, null);
+            } else {
+                std.log.err("Db path not provided after arg", .{});
+                return;
+            }
+        }
+        if (std.mem.eql(u8, arg, "--make-migration")) {
+            if (db == null) {
+                std.log.err("Cannot migrate, provide db path first", .{});
+                return;
+            }
+            try db.?.wipeAndMigrateDb();
+        }
+    }
+
+    if (db == null) {
+        db = try Db.init(allocator, null, null);
+    }
+
+    defer db.?.deinit();
 
     var server = try httpz.Server().init(allocator, .{ .port = 8081 });