Function computeUnifiedDiffStats

src/core/diff/stats.ts:24–50

(diff?: string)

 * Compute +/− counts from a unified diff (ignores headers/hunk lines)
 */
export function computeUnifiedDiffStats(diff?: string): DiffStats | null {
	if (!diff) return null

	try {
		const patches = parsePatch(diff)
		if (!patches || patches.length === 0) return null

		let added = 0
		let removed = 0

		for (const p of patches) {
			for (const h of (p as any).hunks ?? []) {
				for (const l of h.lines ?? []) {
					const ch = (l as string)[0]
					if (ch === "+") added++
					else if (ch === "-") removed++
				}
			}
		}

		if (added > 0 || removed > 0) return { added, removed }
		return { added: 0, removed: 0 }
	} catch {
		// If parsing fails for any reason, signal no stats
		return null
	}
}

/**
 * Compute diff stats from any supported diff format (unified or search-replace)