rclone/vendor/bazil.org/fuse/fs/fstestutil/debug.go

66 lines
1.2 KiB
Go

package fstestutil
import (
"flag"
"log"
"strconv"
"bazil.org/fuse"
)
type flagDebug bool
var debug flagDebug
var _ = flag.Value(&debug)
func (f *flagDebug) IsBoolFlag() bool {
return true
}
func nop(msg interface{}) {}
func (f *flagDebug) Set(s string) error {
v, err := strconv.ParseBool(s)
if err != nil {
return err
}
*f = flagDebug(v)
if v {
fuse.Debug = logMsg
} else {
fuse.Debug = nop
}
return nil
}
func (f *flagDebug) String() string {
return strconv.FormatBool(bool(*f))
}
func logMsg(msg interface{}) {
log.Printf("FUSE: %s\n", msg)
}
func init() {
flag.Var(&debug, "fuse.debug", "log FUSE processing details")
}
// DebugByDefault changes the default of the `-fuse.debug` flag to
// true.
//
// This package registers a command line flag `-fuse.debug` and when
// run with that flag (and activated inside the tests), logs FUSE
// debug messages.
//
// This is disabled by default, as most callers probably won't care
// about FUSE details. Use DebugByDefault for tests where you'd
// normally be passing `-fuse.debug` all the time anyway.
//
// Call from an init function.
func DebugByDefault() {
f := flag.Lookup("fuse.debug")
f.DefValue = "true"
f.Value.Set(f.DefValue)
}