move off of deprecated APIs

codegen/src/main.zig

@@ -387,7 +387,10 @@ fn generateServices(
     file: std.fs.File,
     writer: *std.Io.Writer,
 ) ![][]const u8 {
-    const json = try file.readToEndAlloc(allocator, 1024 * 1024 * 1024);
+    var fbuf: [1024]u8 = undefined;
+    var freader = file.reader(&fbuf);
+    var reader = &freader.interface;
+    const json = try reader.allocRemaining(allocator, .limited(1024 * 1024 * 1024));
     defer allocator.free(json);
     const model = try smithy.parse(allocator, json);
     defer model.deinit();

src/aws_credentials.zig

@@ -463,7 +463,10 @@ const PartialCredentials = struct {
 };
 fn credsForFile(allocator: std.mem.Allocator, file: ?std.fs.File, profile: []const u8) !PartialCredentials {
     if (file == null) return PartialCredentials{};
-    const text = try file.?.readToEndAlloc(allocator, std.math.maxInt(usize));
+    var fbuf: [1024]u8 = undefined;
+    var freader = file.?.reader(&fbuf);
+    var reader = &freader.interface;
+    const text = try reader.allocRemaining(allocator, .unlimited);
     defer allocator.free(text);
     const partial_creds = try credsForText(text, profile);
     var ak: ?[]const u8 = null;

src/aws_test.zig

@@ -382,7 +382,7 @@ const TestSetup = struct {
         self.request_actuals = acts;
         return acts.request.*;
     }
-    fn sendBodyComplete(self_ptr: usize, body: []u8) std.io.Writer.Error!void {
+    fn sendBodyComplete(self_ptr: usize, body: []u8) std.Io.Writer.Error!void {
         const self: *Self = @ptrFromInt(self_ptr);
         if (self.request_actuals == null) return error.WriteFailed; // invalid state - must be called after request
         self.request_actuals.?.body = self.allocator.dupe(u8, body) catch return error.WriteFailed;