Google/auto: collection of source code generators for Java
2 points · Open discussiongoogle
auto
Java2013–2024
google / auto
auto
A collection of source code generators for Java.
25Distinct people
26Mentions
0Explicit recommenders
10.6KGitHub stars
What to know before exploring
What it is
A collection of source code generators for Java.
GitHub
Where it is used
No documented product use was verified in the last source check.
What people are saying
No recommendation phrase was found in the indexed comments.
No classified warning is attached to this page. Read the discussions before treating silence as approval.
Also in these discussions
No other repository is repeatedly linked in the same discussions.
This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 11:23:53 PM UTC.
No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.
Mentions over time
HN mentions by year26 dated mentions
Observed mentions: 2013-11-15 14:14:27 UTC to 2024-11-10 18:16:38 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2013 | 2013-01-01 00:00:00 UTC | 2014-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2014 | 2014-01-01 00:00:00 UTC | 2015-01-01 00:00:00 UTC | 3 | 0 | 3 |
| 2015 | 2015-01-01 00:00:00 UTC | 2016-01-01 00:00:00 UTC | 7 | 0 | 7 |
| 2016 | 2016-01-01 00:00:00 UTC | 2017-01-01 00:00:00 UTC | 2 | 1 | 1 |
| 2017 | 2017-01-01 00:00:00 UTC | 2018-01-01 00:00:00 UTC | 3 | 0 | 3 |
| 2018 | 2018-01-01 00:00:00 UTC | 2019-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2019 | 2019-01-01 00:00:00 UTC | 2020-01-01 00:00:00 UTC | 3 | 0 | 3 |
| 2020 | 2020-01-01 00:00:00 UTC | 2021-01-01 00:00:00 UTC | 1 | 0 | 1 |
| 2021 | 2021-01-01 00:00:00 UTC | 2022-01-01 00:00:00 UTC | 2 | 1 | 1 |
| 2022 | 2022-01-01 00:00:00 UTC | 2023-01-01 00:00:00 UTC | 2 | 0 | 2 |
| 2023 | 2023-01-01 00:00:00 UTC | 2024-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2024 | 2024-01-01 00:00:00 UTC | 2025-01-01 00:00:00 UTC | 1 | 0 | 1 |
From the project README
An excerpt from the repository, fetched Nov 13, 2026.
Read the project’s introduction
Auto
A collection of source code generators for Java.
Overview
Java is full of code that is mechanical, repetitive, typically untested
and sometimes the source of subtle bugs. Sounds like a job for robots!
The Auto subprojects are a collection of code generators that automate those
types of tasks. They create the code you would have written, but without the
bugs.
Save time. Save code. Save sanity.
Subprojects
AutoFactory - JSR-330-compatible factories
AutoService - Provider-configuration files for ServiceLoader
AutoValue - Immutable value-type code generation for Java 8+.
Common - Helper utilities for writing annotation processors.
License
Copyright 2013 Google LLC
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
Read the full README on GitHubWhat Hacker News says
2 sourcesYes but there is also abuse and or complexity that doesn't make it easy. One of the classic examples for me at least is OCaml's Camlp. For Lisp like languages it is easier to have a macro language but for typed languages I think it becomes far more difficult both to implement and understand.
A lot of people don't realize that Java offers a macro/preprocess like system (APT) and it is even sort of hygienic (an example project is Google's Auto [1]).
APT is not that powerful but it gets you quite far and going back to OCaml the new ppx language extension is actually fairly similar (ie annotation processing instead of a complete macro/preprocessing language). .NET has something analogous but even more powerful (IIRC as well as the whole access to the AST aka LINQ style).
> Then you get IDE plugins for writing boilerplate (for, say, JEE). Then
Read the rest
you end up with a XML preprocessing pass that writes Java code (XDoclet).
2001 called and wants it example back :) . Yes APT didn't exist for a while. Tangental but XDoclet sort of reminds me of Go's very weak annotation system. And again It takes time to get a macro/preprocessing engine right particularly for typed
languages. e.g. Rust has had some fair challenges getting this right and even their macro system is not completely hygenic IIRC.
[1]: https://github.com/google/auto