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I'm using Tramp to edit files on a remote machine, and when I run clang-format-buffer, it doesn't actually format the buffer. I get a message (clang-format: success) in the minibuffer, but the expected changes are not made in the buffer. If I use clang-format-buffer on a local copy of the file, it formats the file correctly.
What am I missing to get it to operate correctly on the buffer in Emacs using Tramp?
I don't know which package you are using, but I guess it is clang-format-20191121.1708 from MELPA. I've inspected the source code, and it uses call-process-region internally. call-process is agnostic to remote files, I suggest you contact the author of that package for supporting of remote files.
