Hi all!

I am fairly new to the elixir ecosystem and I’m working on my first library, weather. It’s a simple library that fetches and displays weather information, and it’s packaged as an escript.

In order to support displaying times in the correct zone for the weather data, I’ve added:

config :elixir, :time_zone_database, Tz.TimeZoneDatabase

to my config/config.exs.

Something strange I’ve noticed: when I install the escript via hex, the times are returned in UTC which leads me to believe the config.exs is not being evaluated.

$ mix escript.install hex weather 0.3.7
$ weather --test clear

🌞 10:17AM | 🌚 1:25AM
# THESE ARE UTC TIMES. THEY SHOULD BE 3PM, 6PM, 9PM,12AM,3AM
76°  ⬇   74°  ⬇   64°  ⬇   60°  ⬇   58°
8PM      11PM     2AM      5AM      8AM

77° | scattered clouds | 37% humidity

However, when installing via github, the times are reported in their correct zone, leading me to believe the config.exs is being evaluated in that case:

$ mix escript.install github spencerolson/weather tag v0.3.7
$ weather --test clear

🌞 5:17AM | 🌚 8:25PM

# THESE TIMES ARE IN THE CORRECT ZONE
76°  ⬇   74°  ⬇   64°  ⬇   60°  ⬇   58°
3PM      6PM      9PM      12AM     3AM

77° | scattered clouds | 37% humidity

Can someone help me understand what’s going on? Is it expected that I’d get different results when installing the escript from different locations? I’ve also tried installing without specifying a tag, and I run into the same issues.

Thanks in advance!