src

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git clone git://code.dwrz.net/src
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config.go (1308B)

      1 package config
      2 
      3 import (
      4 	"flag"
      5 	"fmt"
      6 	"os"
      7 	"time"
      8 
      9 	"code.dwrz.net/src/pkg/dqs/entry"
     10 )
     11 
     12 const (
     13 	defaultDir = ""
     14 	dirUsage   = "the path to the dqs directory"
     15 
     16 	defaultDate = ""
     17 	dateUsage   = "the entry date to use, formatted as YYYYMMDD"
     18 )
     19 
     20 type Config struct {
     21 	Date time.Time
     22 	Dir  string
     23 }
     24 
     25 func Get() (*Config, error) {
     26 	var (
     27 		cfg  = &Config{}
     28 		date string
     29 	)
     30 
     31 	flag.StringVar(&cfg.Dir, "dir", defaultDir, dirUsage)
     32 	flag.StringVar(&date, "d", defaultDate, dateUsage)
     33 	flag.StringVar(&date, "date", defaultDate, dateUsage)
     34 
     35 	flag.Parse()
     36 
     37 	// If unset, use the default directory.
     38 	if cfg.Dir == "" {
     39 		dir, err := DefaultDirectory()
     40 		if err != nil {
     41 			return nil, err
     42 		}
     43 
     44 		cfg.Dir = dir
     45 	}
     46 
     47 	// Parse and set the date.
     48 	// If unset, use the current date.
     49 	switch date {
     50 	case defaultDate:
     51 		now := time.Now()
     52 		cfg.Date = time.Date(
     53 			now.Year(), now.Month(), now.Day(),
     54 			0, 0, 0, 0, time.Local,
     55 		)
     56 	default:
     57 		var err error
     58 		cfg.Date, err = time.Parse(entry.DateFormat, date)
     59 		if err != nil {
     60 			return nil, fmt.Errorf("invalid date: %w", err)
     61 		}
     62 	}
     63 
     64 	return cfg, nil
     65 }
     66 
     67 func DefaultDirectory() (string, error) {
     68 	dir, err := os.UserConfigDir()
     69 	if err != nil {
     70 		return "", fmt.Errorf(
     71 			"failed to get user config dir: %w", err,
     72 		)
     73 	}
     74 
     75 	return fmt.Sprintf("%s/dqs", dir), nil
     76 }