locale_config/
unix.rs

1//! Inspect Unix system for locale configuration
2
3use std::env;
4use super::{LanguageRange,Locale};
5
6fn tag(s: &str) -> super::Result<LanguageRange> {
7    LanguageRange::from_unix(s).or_else(|_| LanguageRange::new(s))
8}
9
10// TODO: Read /etc/locale.alias
11fn tag_inv(s: &str) -> LanguageRange {
12    tag(s).unwrap_or(LanguageRange::invariant())
13}
14
15pub fn system_locale() -> Option<Locale> {
16    // LC_ALL overrides everything
17    if let Ok(all) = env::var("LC_ALL") {
18        if let Ok(t) = tag(all.as_ref()) {
19            return Some(Locale::from(t));
20        }
21    }
22    // LANG is default
23    let mut loc =
24        if let Ok(lang) = env::var("LANG") {
25            Locale::from(tag_inv(lang.as_ref()))
26        } else {
27            Locale::invariant()
28        };
29    // category overrides
30    for &(cat, var) in [
31        ("ctype",       "LC_CTYPE"),
32        ("numeric",     "LC_NUMERIC"),
33        ("time",        "LC_TIME"),
34        ("collate",     "LC_COLLATE"),
35        ("monetary",    "LC_MONETARY"),
36        ("messages",    "LC_MESSAGES"),
37        ("paper",       "LC_PAPER"),
38        ("name",        "LC_NAME"),
39        ("address",     "LC_ADDRESS"),
40        ("telephone",   "LC_TELEPHONE"),
41        ("measurement", "LC_MEASUREMENT"),
42    ].iter() {
43        if let Ok(val) = env::var(var) {
44            if let Ok(tag) = tag(val.as_ref())
45            {
46                loc.add_category(cat, &tag);
47            }
48        }
49    }
50    // LANGUAGE defines fallbacks
51    if let Ok(langs) = env::var("LANGUAGE") {
52        for i in langs.split(':') {
53            if i != "" {
54                if let Ok(tag) = tag(i) {
55                    loc.add(&tag);
56                }
57            }
58        }
59    }
60    if loc.as_ref() != "" {
61        return Some(loc);
62    } else {
63        return None;
64    }
65}
locale_config/unix.rs

locale_config/
unix.rs
