如何在OCaml项目的vendor目录中禁用ocamlformat？

问题说明 #

我有一个OCaml项目，vendor目录存放第三方非自研库，希望跳过对这些库的ocamlformat格式化。已配置以下文件：

# .ocamlformat
profile = default
version = 0.24.1

# .ocamlformat-ignore
vendor/*

但执行dune build @fmt时，出现大量与vendor目录相关的版本冲突错误：

(cd _build/default && /home/geckos/.opam/coq-of-solidity/bin/ocamlformat --intf vendor/ocaml-solidity/src/solidity-typechecker/solidity_typechecker.mli) > _build/default/vendor/ocaml-solidity/src/solidity-typechecker/.formatted/solidity_typechecker.mli
ocamlformat: Error while parsing /home/geckos/code/coq-of-solidity/_build/default/vendor/ocaml-solidity/.ocamlformat:
             Project should be formatted using ocamlformat version "0.15.0", but the installed version is "0.24.1"
             For option "align-cases": This option has been removed in version 0.22.
             For option "align-constructors-decl": This option has been removed in version 0.22.
             For option "align-variants-decl": This option has been removed in version 0.22.
             For option "let-open": This option has been removed in version 0.17. Concrete syntax will now always be preserved.

核心原因是vendor目录内的第三方库自带旧版本.ocamlformat配置，与当前安装的ocamlformat版本冲突，且原忽略规则未覆盖递归目录。

解决方法 #

1. 修正.ocamlformat-ignore匹配规则 #

原vendor/*仅匹配vendor下直接子目录，无法递归覆盖深层文件。改为递归匹配所有vendor内容：

# .ocamlformat-ignore
./vendor/**

2. 通过dune配置完全排除vendor #

在项目根目录的dune-project或dune文件中添加配置，让dune跳过vendor目录的所有处理：

(ignore_subdirs vendor)

3. 手动指定格式化范围 #

若不想修改配置，可直接指定仅格式化自研代码目录（假设代码在src下）：

dune build @./src/fmt

内容的提问来源于stack exchange，提问作者geckos