Function addLineNumbers

src/integrations/misc/extract-text.ts:136–160

(content: string, startLine: number = 1)

}

export function addLineNumbers(content: string, startLine: number = 1): string {
	// If content is empty, return empty string - empty files should not have line numbers
	// If content is empty but startLine > 1, return "startLine | " because we know the file is not empty
	// but the content is empty at that line offset
	if (content === "") {
		return startLine === 1 ? "" : `${startLine} | \n`
	}

	// Split into lines and handle trailing line feeds (\n)
	const lines = content.split("\n")
	const lastLineEmpty = lines[lines.length - 1] === ""
	if (lastLineEmpty) {
		lines.pop()
	}

	const maxLineNumberWidth = String(startLine + lines.length - 1).length
	const numberedContent = lines
		.map((line, index) => {
			const lineNumber = String(startLine + index).padStart(maxLineNumberWidth, " ")
			return `${lineNumber} | ${line}`
		})
		.join("\n")

	return numberedContent + "\n"
}
// Checks if every line in the content has line numbers prefixed (e.g., "1 | content" or "123 | content")
// Line numbers must be followed by a single pipe character (not double pipes)
export function everyLineHasLineNumbers(content: string): boolean {