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-rw-r--r--internal/toggledlog/log.go65
1 files changed, 65 insertions, 0 deletions
diff --git a/internal/toggledlog/log.go b/internal/toggledlog/log.go
new file mode 100644
index 0000000..4a2ad03
--- /dev/null
+++ b/internal/toggledlog/log.go
@@ -0,0 +1,65 @@
+package toggledlog
+
+import (
+ "encoding/json"
+ "fmt"
+ "log"
+ "os"
+)
+
+const (
+ ProgramName = "gocryptfs"
+)
+
+func JSONDump(obj interface{}) string {
+ b, err := json.MarshalIndent(obj, "", "\t")
+ if err != nil {
+ return err.Error()
+ } else {
+ return string(b)
+ }
+}
+
+// toggledLogger - a Logger than can be enabled and disabled
+type toggledLogger struct {
+ // Enable or disable output
+ Enabled bool
+ // Panic after logging a message, useful in regression tests
+ PanicAfter bool
+ *log.Logger
+}
+
+func (l *toggledLogger) Printf(format string, v ...interface{}) {
+ if !l.Enabled {
+ return
+ }
+ l.Logger.Printf(format, v...)
+ if l.PanicAfter {
+ panic("PanicAfter: " + fmt.Sprintf(format, v...))
+ }
+}
+func (l *toggledLogger) Println(v ...interface{}) {
+ if !l.Enabled {
+ return
+ }
+ l.Logger.Println(v...)
+ if l.PanicAfter {
+ panic("PanicAfter: " + fmt.Sprintln(v...))
+ }
+}
+
+// As defined by http://elinux.org/Debugging_by_printing#Log_Levels
+// Debug messages
+var Debug *toggledLogger
+
+// Informational message e.g. startup information
+var Info *toggledLogger
+
+// A warning, meaning nothing serious by itself but might indicate problems
+var Warn *toggledLogger
+
+func init() {
+ Debug = &toggledLogger{false, false, log.New(os.Stdout, "", 0)}
+ Info = &toggledLogger{true, false, log.New(os.Stdout, "", 0)}
+ Warn = &toggledLogger{true, false, log.New(os.Stderr, "", 0)}
+}