git - 将模式附加到默认差异 header 模式 (diff.cpp.xfuncname)

Question

我想扩展(但不替换)C 文件的默认差异 header 模式。根据这个post :

you are stuck with extracting the builtin value (which annoyingly, you cannot even get without looking at the source code!), and repeating it in your config file.

然而，内置值在 C 中看起来像这样:

PATTERNS("cpp",
     /* Jump targets or access declarations */
     "!^[ \t]*[A-Za-z_][A-Za-z_0-9]*:[[:space:]]*($|/[/*])\n"
     /* functions/methods, variables, and compounds at top level */
     "^((::[[:space:]]*)?[A-Za-z_].*)$",
     /* -- */
     "[a-zA-Z_][a-zA-Z0-9_]*"
     "|[-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lLuU]*"
     "|[-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->\\*?|\\.\\*"),

我不确定如何在 .gitconfig 文件中呈现。

我试过了

xfuncname = "(!^[ \t]*[A-Za-z_][A-Za-z_0-9]*:[[:space:]]*($|/[/*])\n)|(^((::[[:space:]]*)?[A-Za-z_].*)$\n)|([a-zA-Z_][a-zA-Z0-9_]*)|([-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lLuU]*)|([-+*/<>%&^|=!]=|--|\\+\\+|<<=?|>>=?|&&|\\|\\||::|->\\*?|\\.\\*)"

这给了我 fatal: Invalid regexp to look for hunk header: (!^[ ]*[A-Za-z_][A-Za-z_0-9]*:[[:space:]] *($|/[/*]) 运行 git diff 时。

双反斜杠也不起作用:

xfuncname = "(!^[ \\t]*[A-Za-z_][A-Za-z_0-9]*:[[:space:]]*($|/[/*])\\n)|(^((::[[:space:]]*)?[A-Za-z_].*)$\\n)|([a-zA-Z_][a-zA-Z0-9_]*)|([-+0-9.e]+[fFlL]?|0[xXbB]?[0-9a-fA-F]+[lLuU]*)|([-+*/<>%&^|=!]=|--|\\\\+\\\\+|<<=?|>>=?|&&|\\\\|\\\\||::|->\\\\*?|\\\\.\\\\*)"

没有错误，但是差异 header 是空白的，即它无法匹配任何内容。

Answer 1

至少尝试将 \ 加倍。
gitattributes确实提到:

[diff "tex"]
    xfuncname = "^(\\\\(sub)*section\\{.*)$"

Note. A single level of backslashes are eaten by the configuration file parser, so you would need to double the backslashes; the pattern above picks a line that begins with a backslash, and zero or more occurrences of sub followed by section followed by open brace, to the end of line.