Is there any idea for maintaining a offical docker image

[okhowang]

there is three docker image wrapper now.
https://hub.docker.com/search?q=clang-format-checker&type=image

[Sarcasm]

Ah, thanks for the head up, it's good to know.
However, I'm not sure I want to maintain an image that I have no use for.
For me, run-clang-format.py should be hard-copied into a project, and developers should be able to run it on a project without other requirements than having clang-format installed on the system.
Putting it in a docker image, might make it more difficult for developers to use verify the code locally unless docker is already required even locally.

[okhowang]

copy is simple and useful.

but developer may or may not keep update for the script.

docker image is useful in CI. which is called more simplely.

clang-format is not like compiler, has not project-level dependencies. developer should use latest version, for less bug and more feature.