luatz/tzcache: Allow absolute paths

diff --git a/doc/index.md b/doc/index.md
index bb796417c6fd1781f9d6bc0b36c8b8e119546611..09e7d7dcce12f8a766ecbc68615aef70292dd8b4 100644 (file)
--- a/doc/index.md
+++ b/doc/index.md
@@ -18,6 +18,7 @@ See `gettime` for more information.
 
 Returns a timezone object (see `tzinfo` documentation) for the given `timezone_name`.
 If `timezone_name` is `nil` then the local timezone is used.
+If `timezone_name` is an absolute path, then that `tzinfo` file is used
 
 This uses the local [zoneinfo database](https://www.iana.org/time-zones); 
 names are usually of the form `Country/Largest_City` e.g. "America/New_York".

diff --git a/luatz/tzcache.lua b/luatz/tzcache.lua
index 25a664dffd12e19605787959f896eae604e7d59f..98ced26947a3d84e012cf1f4099e67c44a79899b 100644 (file)
--- a/luatz/tzcache.lua
+++ b/luatz/tzcache.lua
@@ -5,10 +5,12 @@ local local_zoneinfo_path = "/etc/localtime"
 local tz_cache = { }
 
 local function name_to_zoneinfo_path ( name )
-       if name then
-               return base_zoneinfo_path .. name
-       else
+       if name == nil then
                return local_zoneinfo_path
+       elseif name:sub ( 1 , 1 ) == "/" then
+               return name
+       else
+               return base_zoneinfo_path .. name
        end
 end