`stamp` returning correct output in macOS but not in Docker

[markhwhiteii]

I am using lubridate::stamp in a Shiny app that I am deploying using a Docker container. The base image I am using is rocker/shiny: https://hub.docker.com/r/rocker/shiny/~/dockerfile/

When I run the app locally, I get, for example:

> stamp("Jan 1", "%Ob %d", locale = "en_US.UTF-8")(ymd("2018-09-10"))
Using: "%Ob %d"
[1] "Sep 10"

However, when I run the app in the Docker container, stamp("Jan 1", "%Ob %d", locale = "en_US.UTF-8")(ymd("2018-09-10")) written into my app gives me "%Ob 10"

[vspinu]

Probably obvious, but are versions of lubridate on both machines the same?

[markhwhiteii]

Yes, 1.7.4

[vspinu]

Hmm. That means locale is not propagated correctly. Will have a look when time comes but not very soon unfortunately. Loaded with tons of stuff atm.

Do you really need Ob format? Or b would work just fine?

You can also try multiple format sets like stamp("Jan 1", c("bd", "Obd"), locale = "en_US.UTF-8"))

[markhwhiteii]

I get the same thing when trying multiple format sets. I switched to Bd for now, which somehow works just fine. No worries, I'm sure other things are more important, but I thought I'd rase the issue nonetheless.

[hadley]

Now tracking all localisation issues in #815