From 541c9bae715876691ea8274de8072a1a0654f6c9 Mon Sep 17 00:00:00 2001
From: Paul Dicker <paul@pitdicker.nl>
Date: Tue, 19 Mar 2024 15:47:10 +0100
Subject: [PATCH] Check `TZDIR` environment variable

---
 src/offset/local/unix.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/offset/local/unix.rs b/src/offset/local/unix.rs
index 58a29924a6..208d1fe948 100644
--- a/src/offset/local/unix.rs
+++ b/src/offset/local/unix.rs
@@ -189,6 +189,16 @@ impl CachedTzInfo {
         const ZONE_INFO_DIRECTORIES: [&str; 4] =
             ["/usr/share/zoneinfo", "/share/zoneinfo", "/etc/zoneinfo", "/usr/share/lib/zoneinfo"];
 
+        // Use the value of the `TZDIR` environment variable if set.
+        if let Some(tz_dir) = env::var_os("TZDIR") {
+            if !tz_dir.is_empty() {
+                let path = PathBuf::from(tz_dir);
+                if path.exists() {
+                    return Ok(path);
+                }
+            }
+        }
+
         for dir in &ZONE_INFO_DIRECTORIES {
             let path = PathBuf::from(dir);
             if path.exists() {