## Customize flags given to the VM: https://www.erlang.org/doc/apps/erts/erl_cmd.html

## Do not set -name or -sname here. Prefer configuring them at runtime
## Configure -setcookie in the mix.exs release section or at runtime

## Number of dirty schedulers doing IO work (file, sockets, and others)
##+SDio 5

## Increase number of concurrent ports/sockets
##+Q 65536

## Tweak GC to run more often
##-env ERL_FULLSWEEP_AFTER 10

## Use Ctrl-C to interrupt the current shell rather than invoking the emulator's
## break handler and possibly exiting the VM.
+Bc

## Require an initialization handshake within 10 minutes from the startup guard
## See https://hexdocs.pm/nerves_runtime/readme.html#assisted-firmware-validation-and-automatic-revert
-env HEART_INIT_TIMEOUT 600

# Allow time warps so that the Erlang system time can more closely match the
# OS system time.
+C multi_time_warp

## Choose whether to load all code at system startup
## See https://www.erlang.org/doc/system/system_principles.html#code-loading-strategy
## Slow devices sometimes benefit from choosing embedded mode
##-mode interactive

# Load code as per the boot script since not using archives
# See https://www.erlang.org/doc/man/init.html#command-line-flags
-code_path_choice strict

## Disable scheduler busy wait to reduce idle CPU usage and avoid delaying
## other OS processes. See https://www.erlang.org/doc/apps/erts/erl_cmd.html#+sbwt
+sbwt none
+sbwtdcpu none
+sbwtdio none

## Save the shell history between reboots
## See https://www.erlang.org/doc/apps/kernel/kernel_app for additional options
-kernel shell_history enabled

## Enable heartbeat monitoring of the Erlang runtime system
-heart -env HEART_BEAT_TIMEOUT 30

## Start the Elixir shell

-noshell<%= if Version.match?(System.version(), ">= 1.15.0") do %>
-user elixir
-run elixir <%= if Version.match?(System.version(), ">= 1.17.0"), do: "start_cli", else: "start_iex" %>
<% else %>
-user Elixir.IEx.CLI
<% end %>
## Enable colors in the shell
-elixir ansi_enabled true

## Options added after -extra are interpreted as plain arguments and can be
## retrieved using :init.get_plain_arguments(). Options before the "--" are
## interpreted by Elixir and anything afterwards is left around for other IEx
## and user applications.
-extra --no-halt
--
--dot-iex /etc/iex.exs