JLog

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Swift logging to Stderr as well as to rotated log file. works on apple and linux platforms.
jollyjinx/JLog

JLog - Jollys simple logger for swift

  • Logs to both ~/Library/Logs/programname/programname.log as well as to stderr
  • Logrotation
  • Loglevel can be changed

It uses swift-log as well as swift-log-format-and-pipe

Example progam in Sources/JLogExample uses ArgumentParser:

import Foundation
import ArgumentParser
import JLog

struct JLogExample: ParsableCommand
{
    @Flag(name: .shortAndLong, help: "optional debug output")
    var debug: Int

    mutating func run() throws
    {
        if debug > 0
        {
            JLog.loglevel =  debug > 1 ? .trace : .debug
        }

        JLog.notice("notice")
        JLog.info("info")
        JLog.warning("warning")
        JLog.error("error")
        JLog.debug("debug")
        JLog.trace("tracing")
    }
}
JLogExample.main()

For commandline utilities output looks like:

tin>swift 'build' -c release                                                                                                                                                           [0/0] Build complete!

tin>./.build/release/JLogExample
2021-08-07T19:59:11+02:00 ▶ warning ▶ /Users/jolly/Documents/GitHub/JLog/Sources/JLogExample/main.swift:19 ▶ run() ▶ warning
2021-08-07T19:59:11+02:00 ▶ error ▶ /Users/jolly/Documents/GitHub/JLog/Sources/JLogExample/main.swift:20 ▶ run() ▶ error

tin>./.build/release/JLogExample -d
2021-08-07T19:59:23+02:00 ▶ notice ▶ /Users/jolly/Documents/GitHub/JLog/Sources/JLogExample/main.swift:17 ▶ run() ▶ notice
2021-08-07T19:59:23+02:00 ▶ info ▶ /Users/jolly/Documents/GitHub/JLog/Sources/JLogExample/main.swift:18 ▶ run() ▶ info
2021-08-07T19:59:23+02:00 ▶ warning ▶ /Users/jolly/Documents/GitHub/JLog/Sources/JLogExample/main.swift:19 ▶ run() ▶ warning
2021-08-07T19:59:23+02:00 ▶ error ▶ /Users/jolly/Documents/GitHub/JLog/Sources/JLogExample/main.swift:20 ▶ run() ▶ error
2021-08-07T19:59:23+02:00 ▶ debug ▶ /Users/jolly/Documents/GitHub/JLog/Sources/JLogExample/main.swift:21 ▶ run() ▶ debug

tin>./.build/release/JLogExample -dd
2021-08-07T19:59:36+02:00 ▶ notice ▶ /Users/jolly/Documents/GitHub/JLog/Sources/JLogExample/main.swift:17 ▶ run() ▶ notice
2021-08-07T19:59:36+02:00 ▶ info ▶ /Users/jolly/Documents/GitHub/JLog/Sources/JLogExample/main.swift:18 ▶ run() ▶ info
2021-08-07T19:59:36+02:00 ▶ warning ▶ /Users/jolly/Documents/GitHub/JLog/Sources/JLogExample/main.swift:19 ▶ run() ▶ warning
2021-08-07T19:59:36+02:00 ▶ error ▶ /Users/jolly/Documents/GitHub/JLog/Sources/JLogExample/main.swift:20 ▶ run() ▶ error
2021-08-07T19:59:36+02:00 ▶ debug ▶ /Users/jolly/Documents/GitHub/JLog/Sources/JLogExample/main.swift:21 ▶ run() ▶ debug
2021-08-07T19:59:36+02:00 ▶ trace ▶ /Users/jolly/Documents/GitHub/JLog/Sources/JLogExample/main.swift:22 ▶ run() ▶ tracing

Description

  • Swift Tools 5.3.0
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Dependencies

Last updated: Wed Apr 10 2024 18:06:05 GMT-0900 (Hawaii-Aleutian Daylight Time)