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// Package dexlogconfig is a policy package to configure xlog as I like it.
package dexlogconfig
import "github.com/hlandau/xlog"
import "gopkg.in/hlandau/easyconfig.v1/cflag"
import "os"
import _ "github.com/hlandau/buildinfo"
import "gopkg.in/hlandau/svcutils.v1/systemd"
var (
flagGroup = cflag.NewGroup(nil, "xlog")
logSeverityFlag = cflag.String(flagGroup, "severity", "NOTICE", "Log severity (any syslog severity name or number)")
logFileFlag = cflag.String(flagGroup, "file", "", "Log to filename")
fileSeverityFlag = cflag.String(flagGroup, "fileseverity", "TRACE", "File logging severity limit")
logStderrFlag = cflag.Bool(flagGroup, "stderr", true, "Log to stderr?")
stderrSeverityFlag = cflag.String(flagGroup, "stderrseverity", "TRACE", "stderr logging severity limit")
)
func openStderr() {
if logStderrFlag.Value() {
if sev, ok := xlog.ParseSeverity(stderrSeverityFlag.Value()); ok {
xlog.StderrSink.SetSeverity(sev)
}
if systemd.IsRunningUnder() {
xlog.StderrSink.Systemd = true
}
return
}
xlog.RootSink.Remove(xlog.StderrSink)
}
func openFile() {
fn := logFileFlag.Value()
if fn == "" {
return
}
f, err := os.Create(fn)
if err != nil {
return
}
sink := xlog.NewWriterSink(f)
if sev, ok := xlog.ParseSeverity(fileSeverityFlag.Value()); ok {
sink.SetSeverity(sev)
}
xlog.RootSink.Add(sink)
}
func setSeverity() {
sevs := logSeverityFlag.Value()
sev, ok := xlog.ParseSeverity(sevs)
if !ok {
return
}
xlog.Root.SetSeverity(sev)
xlog.VisitSites(func(s xlog.Site) error {
s.SetSeverity(sev)
return nil
})
}
// Parse registered configurables and setup logging.
func Init() {
setSeverity()
openStderr()
openSyslog()
openJournal()
openFile()
}
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