/**
* Expo/Metro log capture and parsing
*/
import { logger, type LogEntry } from "../core/logger.js";
export interface ExpoLogEntry {
timestamp: string;
level: "info" | "warn" | "error" | "debug";
message: string;
source: "metro" | "expo" | "app";
}
// Patterns to categorize log lines
const LOG_PATTERNS = {
error: [/error:/i, /❌/, /failed/i, /exception/i, /crash/i],
warn: [/warning:/i, /⚠️/, /deprecated/i, /caution/i],
debug: [/debug:/i, /verbose:/i],
};
export function parseLogLine(line: string): ExpoLogEntry {
const timestamp = new Date().toISOString();
let level: ExpoLogEntry["level"] = "info";
let source: ExpoLogEntry["source"] = "expo";
// Determine log level
for (const pattern of LOG_PATTERNS.error) {
if (pattern.test(line)) {
level = "error";
break;
}
}
if (level === "info") {
for (const pattern of LOG_PATTERNS.warn) {
if (pattern.test(line)) {
level = "warn";
break;
}
}
}
if (level === "info") {
for (const pattern of LOG_PATTERNS.debug) {
if (pattern.test(line)) {
level = "debug";
break;
}
}
}
// Determine source
if (line.includes("Metro") || line.includes("bundle")) {
source = "metro";
} else if (line.includes("LOG") || line.includes("console.")) {
source = "app";
}
return {
timestamp,
level,
message: line,
source,
};
}
export function processExpoOutput(
output: string,
type: "stdout" | "stderr"
): void {
const lines = output.split("\n").filter((line) => line.trim());
for (const line of lines) {
const entry = parseLogLine(line);
// Log to the expo ring buffer
switch (entry.level) {
case "error":
logger.error("expo", entry.message, { source: entry.source });
break;
case "warn":
logger.warn("expo", entry.message, { source: entry.source });
break;
case "debug":
logger.debug("expo", entry.message, { source: entry.source });
break;
default:
logger.info("expo", entry.message, { source: entry.source });
}
}
}
export function getExpoLogs(lines: number = 100): LogEntry[] {
return logger.tail("expo", lines);
}
export function formatExpoLogsForEvidence(lines: number = 150): string {
return logger.formatForEvidence("expo", lines);
}
