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                 dir, err = defaultDataDir()
  18                 if err != nil {
  19                         return "", err
  20                 }
  21         }
  22
  23         err := os.MkdirAll(dir, 0o700)
  24         if err != nil {
  25                 return "", fmt.Errorf("create data directory: %w", err)
  26         }
  27
  28         return dir, nil
  29 }
  30
  31 // defaultDataDir returns the data directory for an unset ONECHAT_DIR. The XDG
  32 // specification says to ignore a relative XDG_DATA_HOME.
  33 func defaultDataDir() (string, error) {
  34         xdg := os.Getenv("XDG_DATA_HOME")
  35         if filepath.IsAbs(xdg) {
  36                 return filepath.Join(xdg, "onechat"), nil
  37         }
  38
  39         home, err := os.UserHomeDir()
  40         if err != nil {
  41                 return "", fmt.Errorf("find data directory: set ONECHAT_DIR: %w", err)
  42         }
  43
  44         return filepath.Join(home, ".local", "share", "onechat"), nil
  45 }