Set TZDIR on M1 only, update installation for M1s

docs/faq.md

@@ -230,6 +230,7 @@
     In RAPIDS v0.1.0 we replaced `RMySQL` R package with `RMariaDB`, this error means your R virtual environment is out of date, to update it run `snakemake -j1 renv_restore`
     
 ## Unrecognized output timezone "America/New_York"
+
 ???+ failure "Problem"
     When running RAPIDS with R 4.0.3 on MacOS on M1, lubridate may throw an error associated with the timezone.
     ```bash
@@ -241,6 +242,7 @@
    This is because R timezone library is not set. Please add `Sys.setenv(“TZDIR” = file.path(R.home(), “share”, “zoneinfo”))` to the file active.R in renv folder to set the timezone library. For further details on how to test if `TZDIR` is properly set, please refer to `https://github.com/tidyverse/lubridate/issues/928#issuecomment-720059233`. 
    
 ## Unimplemented MAX_NO_FIELD_TYPES
+
 ???+ failure "Problem"
     You get the following error when downloading Fitbit data:
     ```bash
@@ -251,6 +253,7 @@
     At the moment RMariaDB [cannot handle](https://github.com/r-dbi/RMariaDB/issues/127) MySQL columns of JSON type. Change the type of your Fitbit data column to `longtext` (note that the content will not change and will still be a JSON object just interpreted as a string).
     
 ## Running RAPIDS on Apple Silicon M1 Mac
+
 ???+ failure "Problem"
      You get the following error when installing pandoc or running rapids:
      ```bash

docs/setup/installation.md

@@ -48,7 +48,13 @@ You can install RAPIDS using Docker (the fastest), or native instructions for Ma
         If you installed RAPIDS using Docker for Windows on Windows 10, the container will have [limits](https://stackoverflow.com/questions/43460770/docker-windows-container-memory-limit) on the amount of RAM it can use. If you find that RAPIDS crashes due to running out of memory, [increase](https://stackoverflow.com/a/56583203/6030343) this limit.
 
 === "MacOS"
-    We tested these instructions in Catalina
+    We tested these instructions in Catalina and Big Sur
+
+    ??? info "M1 Macs"
+        RAPIDS can run on M1 Macs, the only changes as of Feb 21, 2021 are:
+
+        - R needs to be installed via brew under Rosetta (x86 arch) due to incompatibility issues with some R libraries. To do this, run your terminal [via Rosetta](https://www.youtube.com/watch?v=nv2ylxro7rM&t=138s), then proceed with the usual brew installation command. Use x86 brew to install R and restore RAPIDS' packages (`snakemake -j1 renv_install & snakemake -j1 renv_restore`). 
+        - There is a bug related to timezone codes. We set the correct `TZ_DIR` in `renv/activate.R` (line #19) `Sys.setenv("TZDIR" = file.path(R.home(), "share", "zoneinfo"))` (RAPIDS does this automatically).
 
     1.  Install [brew](https://brew.sh/)
 

renv/activate.R

@@ -15,8 +15,8 @@ local({
   Sys.setenv("RENV_R_INITIALIZING" = "true")
   on.exit(Sys.unsetenv("RENV_R_INITIALIZING"), add = TRUE)
   
-  # Uncomment the line below line if you are using an M1 Mac
-  # Sys.setenv("TZDIR" = file.path(R.home(), "share", "zoneinfo"))
+  if(grepl("Darwin", Sys.info()["sysname"], fixed = TRUE) & grepl("ARM64", Sys.info()["version"], fixed = TRUE)) # M1 Macs
+    Sys.setenv("TZDIR" = file.path(R.home(), "share", "zoneinfo"))
 
   # signal that we've consented to use renv
   options(renv.consent = TRUE)