imported logging module

logger/go.mod

@@ -1,3 +1,12 @@
 module git.haelnorr.com/haelnorr/golibh/logger
 
 go 1.25.5
+
+require github.com/rs/zerolog v1.34.0
+
+require (
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.19 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	golang.org/x/sys v0.12.0 // indirect
+)

logger/go.sum

@@ -0,0 +1,16 @@
+github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
+github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
+github.com/mattn/go-colorable v0.1.13 h1:fFA4WZxdEF4tXPZVKMLwD8oUnCTTo08duU7wxecdEvA=
+github.com/mattn/go-colorable v0.1.13/go.mod h1:7S9/ev0klgBDR4GtXTXX8a3vIGJpMovkB8vQcUbaXHg=
+github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
+github.com/mattn/go-isatty v0.0.19 h1:JITubQf0MOLdlGRuRq+jtsDlekdYPia9ZFsB8h/APPA=
+github.com/mattn/go-isatty v0.0.19/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/rs/xid v1.6.0/go.mod h1:7XoLgs4eV+QndskICGsho+ADou8ySMSjJKDIan90Nz0=
+github.com/rs/zerolog v1.34.0 h1:k43nTLIwcTVQAncfCw4KZ2VY6ukYoZaBPNOE8txlOeY=
+github.com/rs/zerolog v1.34.0/go.mod h1:bJsvje4Z08ROH4Nhs5iH600c3IkWhwp44iRc54W6wYQ=
+golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.12.0 h1:CM0HF96J0hcLAwsHPJZjfdNzs0gftsLfgKt57wWHJ0o=
+golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=

logger/logger.go

@@ -0,0 +1,84 @@
+package logging
+
+import (
+	"io"
+	"os"
+	"path/filepath"
+
+	"github.com/pkg/errors"
+	"github.com/rs/zerolog"
+	"github.com/rs/zerolog/pkgerrors"
+)
+
+// Takes a log level as string and converts it to a zerolog.Level interface.
+// If the string is not a valid input it will return zerolog.InfoLevel
+func GetLogLevel(level string) zerolog.Level {
+	levels := map[string]zerolog.Level{
+		"trace": zerolog.TraceLevel,
+		"debug": zerolog.DebugLevel,
+		"info":  zerolog.InfoLevel,
+		"warn":  zerolog.WarnLevel,
+		"error": zerolog.ErrorLevel,
+		"fatal": zerolog.FatalLevel,
+		"panic": zerolog.PanicLevel,
+	}
+	logLevel, valid := levels[level]
+	if !valid {
+		return zerolog.InfoLevel
+	}
+	return logLevel
+}
+
+// Returns a pointer to a new log file with the specified path.
+// Remember to call file.Close() when finished writing to the log file
+func GetLogFile(path string) (*os.File, error) {
+	logPath := filepath.Join(path, "server.log")
+	file, err := os.OpenFile(
+		logPath,
+		os.O_APPEND|os.O_CREATE|os.O_WRONLY,
+		0663,
+	)
+	if err != nil {
+		return nil, errors.Wrap(err, "os.OpenFile")
+	}
+	return file, nil
+}
+
+// Get a pointer to a new zerolog.Logger with the specified level and output
+// Can provide a file, writer or both. Must provide at least one of the two
+func GetLogger(
+	logLevel zerolog.Level,
+	w io.Writer,
+	logFile *os.File,
+	logDir string,
+) (*zerolog.Logger, error) {
+	if w == nil && logFile == nil {
+		return nil, errors.New("No Writer provided for log output.")
+	}
+
+	zerolog.TimeFieldFormat = zerolog.TimeFormatUnix
+	zerolog.ErrorStackMarshaler = pkgerrors.MarshalStack
+
+	var consoleWriter zerolog.ConsoleWriter
+	if w != nil {
+		consoleWriter = zerolog.ConsoleWriter{Out: w}
+	}
+
+	var output io.Writer
+	if logFile != nil {
+		if w != nil {
+			output = zerolog.MultiLevelWriter(logFile, consoleWriter)
+		} else {
+			output = logFile
+		}
+	} else {
+		output = consoleWriter
+	}
+	logger := zerolog.New(output).
+		With().
+		Timestamp().
+		Logger().
+		Level(logLevel)
+
+	return &logger, nil
+}