@logtail/node/dist/es6/context.js

Better Stack Node.js logger (formerly Logtail)

import { dirname, relative } from "path";
import stackTrace from "stack-trace";
const mainFile = mainFileName();
/**
 * 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, stackContextHint) {
    const stackFrame = getCallingFrame(logtail, stackContextHint);
    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: mainFile,
            },
        },
    };
}
function getCallingFrame(logtail, stackContextHint) {
    for (let fn of [logtail.warn, logtail.error, logtail.info, logtail.debug, logtail.log]) {
        const stack = stackTrace.get(fn);
        if ((stack === null || stack === void 0 ? void 0 : stack.length) > 0)
            return getRelevantStackFrame(stack, stackContextHint);
    }
    return null;
}
function getRelevantStackFrame(frames, stackContextHint) {
    if (stackContextHint) {
        frames.reverse();
        let index = frames.findIndex((frame) => {
            var _a;
            return (((_a = frame.getFileName()) === null || _a === void 0 ? void 0 : _a.includes(stackContextHint.fileName)) &&
                (stackContextHint.methodNames.includes(frame.getMethodName()) ||
                    stackContextHint.methodNames.includes(frame.getFunctionName())));
        });
        if (index > 0) {
            return frames[index - 1];
        }
        if (stackContextHint.required) {
            return null;
        }
        return frames[frames.length - 1];
    }
    return frames[0];
}
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() {
    let argv = process === null || process === void 0 ? void 0 : process.argv;
    if (argv === undefined)
        return "";
    // return first js file argument - arg ending in .js
    for (const arg of argv) {
        if (typeof arg !== "string" || arg.startsWith("-")) {
            // break on first option
            break;
        }
        if (arg.endsWith(".js")) {
            return arg;
        }
    }
    return "";
}
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