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Custom compiled tzdb location #579

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Custom compiled tzdb location #579

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15 changes: 15 additions & 0 deletions src/tz.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -349,6 +349,13 @@ discover_tz_dir()
{
struct stat sb;
using namespace std;

#if !TARGET_OS_IPHONE
auto tz_dir_env = getenv("TZDIR");
if (tz_dir_env != nullptr)
return tz_dir_env;
#endif

# ifndef __APPLE__
CONSTDATA auto tz_dir_default = "/usr/share/zoneinfo";
CONSTDATA auto tz_dir_buildroot = "/usr/share/zoneinfo/uclibc";
Expand Down Expand Up @@ -3731,6 +3738,14 @@ sniff_realpath(const char* timezone)
const time_zone*
tzdb::current_zone() const
{
// If used in a docker instance with no timezone info set in the regular place,
// provide an environment variable to set the current timezone
{
static auto tz_local_env = getenv("TZ");
if (tz_local_env != nullptr)
return locate_zone(tz_local_env);
}

// On some OS's a file called /etc/localtime may
// exist and it may be either a real file
// containing time zone details or a symlink to such a file.
Expand Down