如何使用正则表达式选择标题下包含关键字的 Markdown 文本？

Question

当标题包含

[[Wikilink]]

关键字时，我尝试匹配特定标题级别下的内容（用例：黑曜石）

我希望它匹配较低级别的标题。

示例

[[Wikilink]]

位于H2中，然后匹配下面的所有内容，直到h2或更高版本或文件末尾

难度：

[[Wikilink]]

H级未知。正则表达式应该能够解析多个不一致的文件，其中

[[Wikilink]]

可以是 H1、H2、H3 等。

我当前的正则表达式在遇到任何标题时都会失败：

(^#+ )[^\[]*?\[\[Wikilink]\][^\n]*?\n([\S\s]*?)(?1)

沙箱：https://regex101.com/r/bLdifP/1

不知何故与这个问题有关：正则表达式匹配降价标题和嵌套在特定标题下的文本

Answer 1

尝试以下正则表达式。

^(#+) .*\[\[Wikilink\]\].*$(?=([\S\s]*?)(?:^(?!\1#+)#+ |\z))

正则表达式可以分解如下。

^                        the beginning of a "line"
--------------------------------------------------------------------
(                        group and capture to \1:
--------------------------------------------------------------------
  #+                       '#' (1 or more times (matching the most
                           amount possible))
--------------------------------------------------------------------
)                        end of \1
--------------------------------------------------------------------
                         ' '
--------------------------------------------------------------------
.*                       any character except \n (0 or more times
                         (matching the most amount possible))
--------------------------------------------------------------------
\[                       '['
--------------------------------------------------------------------
\[                       '['
--------------------------------------------------------------------
Wikilink                 'Wikilink'
--------------------------------------------------------------------
\]                       ']'
--------------------------------------------------------------------
\]                       ']'
--------------------------------------------------------------------
.*                       any character except \n (0 or more times
                         (matching the most amount possible))
--------------------------------------------------------------------
$                        before an optional \n, and the end of a
                         "line"
--------------------------------------------------------------------
(?=                      look ahead to see if there is:
--------------------------------------------------------------------
  (                        group and capture to \2:
--------------------------------------------------------------------
    [\S\s]*?                 any character of: non-whitespace (all
                             but \n, \r, \t, \f, and " "),
                             whitespace (\n, \r, \t, \f, and " ")
                             (0 or more times (matching the least
                             amount possible))
--------------------------------------------------------------------
  )                        end of \2
--------------------------------------------------------------------
  (?:                      group, but do not capture:
--------------------------------------------------------------------
    ^                        the beginning of a "line"
--------------------------------------------------------------------
    (?!                      look ahead to see if there is not:
--------------------------------------------------------------------
      \1                       what was matched by capture \1
--------------------------------------------------------------------
      #+                       '#' (1 or more times (matching the
                               most amount possible))
--------------------------------------------------------------------
    )                        end of look-ahead
--------------------------------------------------------------------
    #+                       '#' (1 or more times (matching the
                             most amount possible))
--------------------------------------------------------------------
                             ' '
--------------------------------------------------------------------
   |                        OR
--------------------------------------------------------------------
    \z                       the end of the string
--------------------------------------------------------------------
  )                        end of grouping
--------------------------------------------------------------------
)                        end of look-ahead