Adding GetDebug method to loggers.

For when you need a Logger but don't want one. ;)

logging/doc.go

@@ -3,18 +3,19 @@ Package logging implements and presents various loggers under a unified interfac
 
 These particular loggers (logging.Logger) available are:
 
+	NullLogger
 	StdLogger
 	FileLogger
 	SystemDLogger (Linux only)
 	SyslogLogger (Linux only)
 	WinLogger (Windows only)
 
-There is a sixth type of logging.Logger, MultiLogger, that allows for multiple loggers to be written to with a single call.
+There is a seventh type of logging.Logger, MultiLogger, that allows for multiple loggers to be written to with a single call.
+As you may have guessed, NullLogger doesn't actually log anything but is fully "functional" as a logging.Logger.
 
 Note that for some Loggers, the prefix may be modified - "literal" loggers (StdLogger and FileLogger) will append a space to the end of the prefix.
 If this is undesired (unlikely), you will need to modify (Logger).Prefix and run (Logger).Logger.SetPrefix(yourPrefixHere) for the respective logger.
 
-
 Every logging.Logger type has the following methods that correspond to certain "levels".
 
 	Alert(s string, v ...interface{}) (err error)
@@ -36,6 +37,7 @@ Note that in the case of a MultiLogger, err (if not nil) will be a (r00t2.io/gou
 logging.Logger types also have the following methods:
 
 	DoDebug(d bool) (err error)
+	GetDebug() (d bool)
 	SetPrefix(p string) (err error)
 	GetPrefix() (p string, err error)
 	Setup() (err error)

logging/funcs_file.go

@@ -1,12 +1,12 @@
 package logging
 
 import (
-	`errors`
+	"errors"
 	"fmt"
-	`io/fs`
+	"io/fs"
 	"log"
 	"os"
-	`strings`
+	"strings"
 )
 
 // Setup sets up/configures a FileLogger and prepares it for use.
@@ -65,6 +65,14 @@ func (l *FileLogger) DoDebug(d bool) (err error) {
 	return
 }
 
+// GetDebug returns the debug status of this FileLogger.
+func (l *FileLogger) GetDebug() (d bool) {
+
+	d = l.EnableDebug
+
+	return
+}
+
 /*
 SetPrefix sets the prefix for this FileLogger.
 err will always be nil; it's there for interface-compat.

logging/funcs_multilogger.go

@@ -1,11 +1,11 @@
 package logging
 
 import (
-	`errors`
+	"errors"
-	`fmt`
+	"fmt"
-	`sync`
+	"sync"
 
-	`r00t2.io/goutils/multierr`
+	"r00t2.io/goutils/multierr"
 )
 
 // Setup sets up/configures a MultiLogger (and all its MultiLogger.Loggers) and prepares it for use.
@@ -114,6 +114,14 @@ func (m *MultiLogger) DoDebug(d bool) (err error) {
 	return
 }
 
+// GetDebug returns the debug status of this MultiLogger.
+func (m *MultiLogger) GetDebug() (d bool) {
+
+	d = m.EnableDebug
+
+	return
+}
+
 /*
 SetPrefix sets the prefix for this MultiLogger (and all its MultiLogger.Loggers).
 

logging/funcs_multilogger_mgr.go

@@ -1,10 +1,10 @@
 package logging
 
 import (
-	`path`
+	"path"
 
-	`github.com/google/uuid`
+	"github.com/google/uuid"
-	`r00t2.io/sysutils/paths`
+	"r00t2.io/sysutils/paths"
 )
 
 /*
@@ -145,6 +145,40 @@ func (m *MultiLogger) AddFileLogger(identifier string, logFlags int, logfilePath
 	return
 }
 
+/*
+	AddNullLogger adds a NullLogger to a MultiLogger.
+
+	identifier is a string to use to identify the added NullLogger in MultiLogger.Loggers.
+	If empty, one will be automatically generated.
+*/
+func (m *MultiLogger) AddNullLogger(identifier string) (err error) {
+
+	var exists bool
+	var prefix string
+
+	if identifier == "" {
+		identifier = uuid.New().String()
+	}
+
+	if _, exists = m.Loggers[identifier]; exists {
+		err = ErrExistingLogger
+		return
+	}
+
+	m.Loggers[identifier] = &NullLogger{}
+	if err = m.Loggers[identifier].Setup(); err != nil {
+		return
+	}
+
+	if prefix, err = m.Loggers[identifier].GetPrefix(); err != nil {
+		return
+	}
+
+	m.Loggers[identifier].Debug("logger initialized of type %T with prefix %v", m.Loggers[identifier], prefix)
+
+	return
+}
+
 // RemoveLogger will let you remove a Logger from MultiLogger.Loggers.
 func (m *MultiLogger) RemoveLogger(identifier string) (err error) {
 

logging/funcs_nulllogger.go

@@ -0,0 +1,74 @@
+package logging
+
+// Setup does nothing at all; it's here for interface compat. 🙃
+func (l *NullLogger) Setup() (err error) {
+	return
+}
+
+// DoDebug does nothing at all; it's here for interface compat. 🙃
+func (l *NullLogger) DoDebug(d bool) (err error) {
+	return
+}
+
+// GetDebug returns the debug status of this NullLogger. It will always return true. 🙃
+func (n *NullLogger) GetDebug() (d bool) {
+
+	d = true
+
+	return
+}
+
+// SetPrefix does nothing at all; it's here for interface compat. 🙃
+func (l *NullLogger) SetPrefix(p string) (err error) {
+	return
+}
+
+// GetPrefix does nothing at all; it's here for interface compat. 🙃
+func (l *NullLogger) GetPrefix() (p string, err error) {
+	return
+}
+
+// Shutdown does nothing at all; it's here for interface compat. 🙃
+func (l *NullLogger) Shutdown() (err error) {
+	return
+}
+
+// Alert does nothing at all; it's here for interface compat. 🙃
+func (l *NullLogger) Alert(s string, v ...interface{}) (err error) {
+	return
+}
+
+// Crit does nothing at all; it's here for interface compat. 🙃
+func (l *NullLogger) Crit(s string, v ...interface{}) (err error) {
+	return
+}
+
+// Debug does nothing at all; it's here for interface compat. 🙃
+func (l *NullLogger) Debug(s string, v ...interface{}) (err error) {
+	return
+}
+
+// Emerg does nothing at all; it's here for interface compat. 🙃
+func (l *NullLogger) Emerg(s string, v ...interface{}) (err error) {
+	return
+}
+
+// Err does nothing at all; it's here for interface compat. 🙃
+func (l *NullLogger) Err(s string, v ...interface{}) (err error) {
+	return
+}
+
+// Info does nothing at all; it's here for interface compat. 🙃
+func (l *NullLogger) Info(s string, v ...interface{}) (err error) {
+	return
+}
+
+// Notice does nothing at all; it's here for interface compat. 🙃
+func (l *NullLogger) Notice(s string, v ...interface{}) (err error) {
+	return
+}
+
+// Warning does nothing at all; it's here for interface compat. 🙃
+func (l *NullLogger) Warning(s string, v ...interface{}) (err error) {
+	return
+}

logging/funcs_std.go

@@ -2,10 +2,10 @@ package logging
 
 import (
 	"fmt"
-	`io`
+	"io"
-	`log`
+	"log"
-	`os`
+	"os"
-	`strings`
+	"strings"
 )
 
 /*
@@ -80,6 +80,14 @@ func (l *StdLogger) DoDebug(d bool) (err error) {
 	return
 }
 
+// GetDebug returns the debug status of this StdLogger.
+func (l *StdLogger) GetDebug() (d bool) {
+
+	d = l.EnableDebug
+
+	return
+}
+
 /*
 SetPrefix sets the prefix for this StdLogger.
 err will always be nil; it's there for interface-compat.

logging/funcs_sysd_linux.go

@@ -52,6 +52,14 @@ func (l *SystemDLogger) DoDebug(d bool) (err error) {
 	return
 }
 
+// GetDebug returns the debug status of this SystemDLogger.
+func (l *SystemDLogger) GetDebug() (d bool) {
+
+	d = l.EnableDebug
+
+	return
+}
+
 /*
 SetPrefix sets the prefix for this SystemDLogger.
 err will always be nil; it's there for interface-compat.

logging/funcs_syslog_linux.go

@@ -5,7 +5,7 @@ import (
 	"log"
 	"log/syslog"
 
-	`r00t2.io/goutils/multierr`
+	"r00t2.io/goutils/multierr"
 )
 
 // Setup sets up/configures a SyslogLogger and prepares it for use.
@@ -95,6 +95,14 @@ func (l *SyslogLogger) DoDebug(d bool) (err error) {
 	return
 }
 
+// GetDebug returns the debug status of this SyslogLogger.
+func (l *SyslogLogger) GetDebug() (d bool) {
+
+	d = l.EnableDebug
+
+	return
+}
+
 // SetPrefix sets the prefix for this SyslogLogger.
 func (l *SyslogLogger) SetPrefix(prefix string) (err error) {
 

logging/funcs_winlogger_windows.go

@@ -1,15 +1,15 @@
 package logging
 
 import (
-	`errors`
+	"errors"
-	`fmt`
+	"fmt"
-	`os`
+	"os"
-	`os/exec`
+	"os/exec"
-	`syscall`
+	"syscall"
 
-	`golang.org/x/sys/windows/registry`
+	"golang.org/x/sys/windows/registry"
-	`golang.org/x/sys/windows/svc/eventlog`
+	"golang.org/x/sys/windows/svc/eventlog"
-	`r00t2.io/sysutils/paths`
+	"r00t2.io/sysutils/paths"
 )
 
 /*
@@ -150,6 +150,14 @@ func (l *WinLogger) DoDebug(d bool) (err error) {
 	return
 }
 
+// GetDebug returns the debug status of this WinLogger.
+func (l *WinLogger) GetDebug() (d bool) {
+
+	d = l.EnableDebug
+
+	return
+}
+
 // SetPrefix sets the prefix for this WinLogger.
 func (l *WinLogger) SetPrefix(prefix string) (err error) {
 

logging/types.go

@@ -2,7 +2,7 @@ package logging
 
 import (
 	"log"
-	`os`
+	"os"
 )
 
 /*
@@ -18,6 +18,7 @@ type Logger interface {
 	Notice(s string, v ...interface{}) (err error)
 	Warning(s string, v ...interface{}) (err error)
 	DoDebug(d bool) (err error)
+	GetDebug() (d bool)
 	SetPrefix(p string) (err error)
 	GetPrefix() (p string, err error)
 	Setup() (err error)
@@ -86,6 +87,9 @@ type FileLogger struct {
 	writer *os.File
 }
 
+// NullLogger is used mainly for test implementations, mockup code, etc. It does absolutely nothing with all messages sent to it.
+type NullLogger struct{}
+
 // MultiLogger is used to contain one or more Loggers and present them all as a single Logger.
 type MultiLogger struct {
 	/*