How can the regex be applied to match from a certain pattern until either an empty line or the occurrence of the next pattern?

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You can use the following regex to match from a certain pattern until either an empty line or the occurrence of the next pattern:

pattern[\s\S]*?(?=\n\s*\n|\n\s*pattern|$)

Here, "pattern" refers to the specific pattern you want to match.

Explanation: - [\s\S]*? matches any character (including line breaks) zero or more times lazily (i.e., the shortest possible match). - (?=\n\s*\n|\n\s*pattern|$) is a positive lookahead that checks for either an empty line (\n\s*\n), the occurrence of the next pattern (\n\s*pattern), or the end of the string ($).

Once you apply this regex, you should get a match that includes the entire block of text starting from the pattern and ending at the empty line or next occurrence of the pattern.