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Use the LANG environment variable on Linux #1308

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Use the LANG environment variable on Linux #1308

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24 changes: 24 additions & 0 deletions Sources/FoundationEssentials/Locale/Locale_Cache.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -287,6 +287,30 @@ struct LocaleCache : Sendable, ~Copyable {
}
return preferredLocaleID
}
#elseif os(Linux)
func preferences() -> (LocalePreferences, Bool) {
var prefs = LocalePreferences()
// TODO: Fill other preference values from LC_* and LANGUAGE variables: https://github.com/swiftlang/swift-foundation/issues/717
if let lang = ProcessInfo.processInfo.environment["LANG"],
!lang.isEmpty
{
prefs.locale = lang
prefs.languages = [fixed(lang).languageCode ?? "en-001"]
} else {
prefs.locale = "en_001"
prefs.languages = ["en-001"]
}
return (prefs, true)
}

func preferredLanguages(forCurrentUser: Bool) -> [String] {
// TODO: Override with LANGUAGE variable: https://github.com/swiftlang/swift-foundation/issues/717
[Locale.canonicalLanguageIdentifier(from: current.languageCode ?? "en-001")]
}

func preferredLocale() -> String? {
current.identifier
}
#else
func preferences() -> (LocalePreferences, Bool) {
var prefs = LocalePreferences()
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