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// Package basedir provides access to XDG base directory spec. For more
// information, please see the spec:
// https://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
package basedir
import (
"os"
"os/user"
"path/filepath"
)
var (
// Home is the user's home directory.
Home string
// DataHome is the path to the directory where user data files
// should be written.
DataHome string
// ConfigHome is the path to the directory where user
// configuration files should be written.
ConfigHome string
// CacheHome is the path to the directory where non-essential
// (cached) data should be written.
CacheHome string
// RuntimeDir is the path to the directory where runtime files
// should be placed.
RuntimeDir string
// DataDirs is a slice of paths that should be searched for data
// files.
DataDirs []string
// ConfigDirs is a slice of paths that should be searched for
// configuration files.
ConfigDirs []string
)
func init() {
Home = os.Getenv("HOME")
if Home == "" {
u, err := user.Current()
if err == nil {
Home = u.HomeDir
} else {
Home = filepath.Join(os.TempDir(), os.Args[0])
}
}
DataHome = getPath("XDG_DATA_HOME", filepath.Join(Home, ".local/share"))
ConfigHome = getPath("XDG_CONFIG_HOME", filepath.Join(Home, ".config"))
CacheHome = getPath("XDG_CACHE_HOME", filepath.Join(Home, ".cache"))
RuntimeDir = getPath("XDG_RUNTIME_DIR", CacheHome)
DataDirs = getPathList("XDG_DATA_DIRS", []string{"/usr/local/share", "/usr/share"})
ConfigDirs = getPathList("XDG_CONFIG_DIRS", []string{"/etc/xdg"})
}
func getPath(env, def string) string {
path := os.Getenv(env)
if path == "" || !filepath.IsAbs(path) {
return def
}
return path
}
func getPathList(env string, def []string) []string {
paths := filepath.SplitList(os.Getenv(env))
for i := 0; i < len(paths); i++ {
// If the path isn't absolute, we need to ignore it.
if !filepath.IsAbs(paths[i]) {
paths = append(paths[:i], paths[i+1:]...)
}
}
if len(paths) == 0 {
return def
}
return paths
}
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