winston-transport-logtail/dist/es6/context.js

logtail.com transport for winston v3 logger

import { dirname, relative } from "path";
import stackTrace from "stack-trace";
/**
 * Determines the file name and the line number from which the log
 * was initiated (if we're able to tell).
 *
 * @returns Context The caller's filename and the line number
 */
export function getStackContext(logtail) {
    const stackFrame = getCallingFrame(logtail);
    if (stackFrame === null)
        return {};
    return {
        context: {
            runtime: {
                file: relativeToMainModule(stackFrame.getFileName()),
                type: stackFrame.getTypeName(),
                method: stackFrame.getMethodName(),
                function: stackFrame.getFunctionName(),
                line: stackFrame.getLineNumber(),
                column: stackFrame.getColumnNumber(),
            },
            system: {
                pid: process.pid,
                main_file: mainFileName(),
            },
        },
    };
}
function getCallingFrame(logtail) {
    for (let fn of [
        logtail.info,
        logtail.warn,
        logtail.error,
        logtail.log,
        logtail,
    ]) {
        const stack = stackTrace.get(fn);
        if (stack.length > 0) {
            return stack[0];
        }
    }
    return null;
}
function relativeToMainModule(fileName) {
    if (typeof fileName !== "string") {
        return null;
    }
    else if (fileName.startsWith("file:/")) {
        const url = new URL(fileName);
        return url.pathname;
    }
    else {
        const rootPath = dirname(mainFileName());
        return relative(rootPath, fileName);
    }
}
function mainFileName() {
    var _a, _b;
    return (_b = (_a = require === null || require === void 0 ? void 0 : require.main) === null || _a === void 0 ? void 0 : _a.filename) !== null && _b !== void 0 ? _b : "";
}
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