ripgrep -u 参数详解：忽略 .gitignore、隐藏文件及二进制搜索

-u, --unrestricted
This flag reduces the level of "smart" filtering. Repeated uses (up to 3) reduces the filtering even more. When repeated three times, ripgrep will search every file in a directory tree.

    A single -u/--unrestricted flag is equivalent to --no-ignore. Two -u/--unrestricted flags is equivalent to --no-ignore -./--hidden. Three -u/--unrestricted flags is equivalent to --no-ignore -./--hidden --binary.

    The only filtering ripgrep still does when -uuu is given is to skip symbolic links and to avoid printing matches from binary files. Symbolic links can be followed via the -L/--follow flag, and binary files can be treated as text files via the -a/--text flag.

核心含义拆解

1. 总体概念

This flag reduces the level of "smart" filtering. Repeated uses (up to 3) reduces the filtering even more. 意思：这个标志降低了'智能'过滤的级别。重复使用它（最多 3 次）会进一步减少过滤。

2. 三个级别的具体定义

文档明确列出了 -u 叠加三次的等价效果：

• -u (输入一次)

  • 原文：equivalent to --no-ignore
  • 意思：不再理会忽略规则。即使写在 .gitignore 或 .ignore 里的文件，也会被搜索。
  • *场景：你想搜 node_modules 或构建目录里的代码。

• -uu (输入两次)

  • 原文：equivalent to --no-ignore -./--hidden
  • 意思：包含隐藏文件。除了忽略 .gitignore，还会搜索以 开头的文件（如 , ）。