Use $TZDIR to search for time-zone data. Thus avoid depending on package
"tzdata", which often introduces changes with near-immediate effects, so it's
important to be able to update it fast.
Based on a patch fron NixOS.
===================================================================
--- qtbase-opensource-src-5.14.2.orig/src/corelib/time/qtimezoneprivate_tz.cpp
+++ qtbase-opensource-src-5.15.2/src/corelib/time/qtimezoneprivate_tz.cpp
@@ -70,7 +70,11 @@
// Parse zone.tab table, assume lists all installed zones, if not will need to read directories
static QTzTimeZoneHash loadTzTimeZones()
{
- QString path = QStringLiteral("/usr/share/zoneinfo/zone.tab");
+ // Try TZDIR first, in case we're running on GuixSD.
+ QString path = QFile::decodeName(qgetenv("TZDIR")) + QStringLiteral("/zone.tab");
+ // Fallback to traditional paths in case we are not on GuixSD.
+ if (!QFile::exists(path))
+ path = QStringLiteral("/usr/share/zoneinfo/zone.tab");
if (!QFile::exists(path))
path = QStringLiteral("/usr/lib/zoneinfo/zone.tab");
@@ -645,6 +649,9 @@
if (!tzif.open(QIODevice::ReadOnly))
return;
} else {
+ // Try TZDIR first, in case we're running on GuixSD.
+ tzif.setFileName(QFile::decodeName(qgetenv("TZDIR")) + QStringLiteral("/") + QString::fromLocal8Bit(ianaId));
+ if (!tzif.open(QIODevice::ReadOnly)) {
// Open named tz, try modern path first, if fails try legacy path
tzif.setFileName(QLatin1String("/usr/share/zoneinfo/") + QString::fromLocal8Bit(ianaId));
if (!tzif.open(QIODevice::ReadOnly)) {
@@ -652,6 +659,7 @@
if (!tzif.open(QIODevice::ReadOnly))
return;
}
+ }
}
QDataStream ds(&tzif);
>