dump output as JSON to file for inspection

logger-dump.go

package logger

import (
	"encoding/json"
	"fmt"
	"os"
	"path"
	"path/filepath"
)

func DumpFile(path string, data ...any) error {
	dir := filepath.Dir(path)
	if _, err := os.Stat(dir); err != nil {
		return err
	}

	f, err := os.OpenFile(path, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600)
	if err != nil {
		return err
	}

	defer f.Close()

	for _, d := range data {
		s, err := json.MarshalIndent(d, "", "\t")
		if err != nil {
			return err
		}
		if _, err = fmt.Fprintf(f, "%+v\n", string(s)); err != nil {
			return err
		}
	}
	return nil
}

func Dump(data any) error {
	directory, err := currentExecutableDirectory()
	if err != nil {
		return err
	}
	p := path.Join(directory, "dump")
	return DumpFile(p, data)
}

func currentExecutableDirectory() (string, error) {
	ex, err := os.Executable()
	if err != nil {
		return "", err
	}
	return path.Dir(ex), nil
}