Files
OpsLog/internal/cat/log.go
T
2026-06-03 21:53:31 +02:00

61 lines
1.7 KiB
Go

package cat
import (
"log"
"os"
"path/filepath"
)
// LogSink, when set by the host app at startup, receives every CAT debug
// line so they land in the unified app log (opslog.log) alongside the rest
// of OpsLog's diagnostics. Until it's wired we fall back to a dedicated
// cat.log file so early-startup lines aren't lost.
var LogSink func(format string, args ...any)
// catLogger forwards Printf either to the host LogSink (preferred) or to a
// local file/stderr fallback. Keeps the call sites (debugLog.Printf(...))
// unchanged.
type catLogger struct{ fallback *log.Logger }
func (c *catLogger) Printf(format string, args ...any) {
if LogSink != nil {
LogSink("cat: "+format, args...)
return
}
if c.fallback != nil {
c.fallback.Printf(format, args...)
}
}
// debugLog writes CAT debug events so users can diagnose mode/freq mismatches
// without rebuilding with a console. Once LogSink is set, lines flow into the
// main opslog.log.
var debugLog = &catLogger{fallback: openFallbackLog()}
func openFallbackLog() *log.Logger {
base, err := os.UserConfigDir()
if err != nil {
return log.Default()
}
dir := filepath.Join(base, "OpsLog")
if err := os.MkdirAll(dir, 0o755); err != nil {
return log.Default()
}
f, err := os.OpenFile(filepath.Join(dir, "cat.log"),
os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0o644)
if err != nil {
return log.Default()
}
return log.New(f, "", log.LstdFlags|log.Lmicroseconds)
}
// DebugLogPath returns where the fallback cat.log lives, for surfacing in the
// UI / docs. When LogSink is wired, CAT lines are in the main app log instead.
func DebugLogPath() string {
base, err := os.UserConfigDir()
if err != nil {
return ""
}
return filepath.Join(base, "OpsLog", "cat.log")
}