git.giacomolli.uk - onechat/blob - datadir.go

   1 package main
   2
   3 import (
   4         "fmt"
   5         "os"
   6         "path/filepath"
   7 )
   8
   9 // dataDir returns the data directory and creates it with mode 0700 when it does
  10 // not exist. It is ONECHAT_DIR when that is set. Otherwise it is
  11 // $XDG_DATA_HOME/onechat when XDG_DATA_HOME is an absolute path, or else
  12 // ~/.local/share/onechat.
  13 func dataDir() (string, error) {
  14         dir := os.Getenv("ONECHAT_DIR")
  15         if dir == "" {
  16                 var err error
  17
  18                 dir, err = defaultDataDir()
  19                 if err != nil {
  20                         return "", err
  21                 }
  22         }
  23
  24         err := os.MkdirAll(dir, 0o700)
  25         if err != nil {
  26                 return "", fmt.Errorf("create data directory: %w", err)
  27         }
  28
  29         return dir, nil
  30 }
  31
  32 // defaultDataDir returns the data directory for an unset ONECHAT_DIR. The XDG
  33 // specification says to ignore a relative XDG_DATA_HOME.
  34 func defaultDataDir() (string, error) {
  35         xdg := os.Getenv("XDG_DATA_HOME")
  36         if filepath.IsAbs(xdg) {
  37                 return filepath.Join(xdg, "onechat"), nil
  38         }
  39
  40         home, err := os.UserHomeDir()
  41         if err != nil {
  42                 return "", fmt.Errorf("find data directory: set ONECHAT_DIR: %w", err)
  43         }
  44
  45         return filepath.Join(home, ".local", "share", "onechat"), nil
  46 }