Function createFilepathRegexp

extensions/copilot/src/util/common/markdown.ts:26–41

(languageId?: string)

export const filepathCodeBlockMarker = 'filepath:';

export function createFilepathRegexp(languageId?: string): RegExp {
	const language = getLanguage(languageId);
	const prefixes: string[] = ['#', '\\/\\/']; // always allow # and // as comment start
	const suffixes: string[] = [];
	function add(lineComment: { start: string; end?: string }) {
		prefixes.push(escapeRegExpCharacters(lineComment.start));
		if (lineComment.end) {
			suffixes.push(escapeRegExpCharacters(lineComment.end));
		}
	}
	add(language.lineComment);
	language.alternativeLineComments?.forEach(add);
	const startMatch = `(?:${prefixes.join('|')})`;
	const optionalEndMatch = suffixes.length ? `(?:\\s*${suffixes.join('|')})?` : '';
	return new RegExp(`^\\s*${startMatch}\\s*${filepathCodeBlockMarker}\\s*(.*?)${optionalEndMatch}\\s*$`);
}

/**
 * Create a markdown code block with an optional language id and an optional file path.