joaohf

In order to create a private hexpm follow the steps from: https://hex.pm/docs/self-hosting

Once you get the file server running, it's time to configure your rebar.config like the following:

```
{erl_opts, [debug_info]}.
{deps, [decimal, relsyncd]}.

{shell, [
  % {config, "config/sys.config"},

joaohf

meta-erlang talk. It's not about metaprogramming. meta-erlang is an opensource project that helps
building embedded products based on Yocto Project and Linux kernel. It might sounds a bit disconnected
but when we consider the full product (hardware + software or only software) lifecycle it makes a lot of sense.
We will discuss Erlang and the BEAM context into Linux embedded world. How is it possible to create
a full stack solution (from a linux distro up an application written in any BEAM language) ?. 
Moreover, how could a group of developers create a SDK (Software Development Kits) within all components needed
(compilers, libraries, etc) ?. The talk also covers some additional subjects like Erlang/OTP building steps for embedded;
challenges on testing and patching OTP; some exta patches tailored for embedded tweaks; building for multiplatform;
not only for embedded context but also for building services for cloud environments like Amazon Graviton instances.
Worth mention some other possibilities like runnin

joaohf

  def project do
    [
    ...
      docs: docs(),
    ...
    ]
  end

  defp docs do
    [

joaohf

cp /home/joaohf/work/opensource/meta/meta-erlang/build/tmp/deploy/images/qemux86/core-image-minimal-qemux86.ext4 /tmp/core-image-minimal-qemux86.ext4.0
cp /home/joaohf/work/opensource/meta/meta-erlang/build/tmp/deploy/images/qemux86/core-image-minimal-qemux86.ext4 /tmp/core-image-minimal-qemux86.ext4.1
cp /home/joaohf/work/opensource/meta/meta-erlang/build/tmp/deploy/images/qemux86/core-image-minimal-qemux86.ext4 /tmp/core-image-minimal-qemux86.ext4.2

sudo  ../poky/scripts/runqemu-gen-tapdevs 1000 1000 6 tmp/sysroots-components/x86_64/qemu-helper-native/usr/bin/

sudo /home/joaohf/work/opensource/meta/meta-erlang/build/tmp/work/x86_64-linux/qemu-helper-native/1.0-r1/recipe-sysroot-native/usr/bin/qemu-system-i386 -device virtio-net-pci,netdev=net1,mac=52:54:00:12:34:03 -netdev tap,id=net1,ifname=tap2,script=no,downscript=no -drive file=/tmp/core-image-minimal-qemux86.ext4.0,if=virtio,format=raw -vga vmware -show-cursor -usb -device usb-tablet -device virtio-rng-pci   -cpu pentium2 -enable-kvm -m 256 -serial m

joaohf

environment :prod do
  # MIX_TARGET_INCLUDE_ERTS is set by meta-erlang/classes/mix.bbclass
  set include_erts: System.get_env("MIX_TARGET_INCLUDE_ERTS")
  set include_src: false
  set cookie: :"d.K@rG|YpY`|?i&]Fsdljji)JMhk)%j)}f|Y6cquU!He<]u=sHp`.o2p[I3ee]gD"
  set vm_args: "rel/vm.args"
end

joaohf

{relx, ...
        {include_erts, true},
        {system_libs, true},
...
}.

joaohf

REBAR3_PROFILE ?= ""
REBAR3_RELEASE_NAME ?= "${BPN}-${@get_erlang_release("${PV}")}"

export REBAR3_TARGET_INCLUDE_ERTS = "${STAGING_LIBDIR}/erlang"
export REBAR3_TARGET_SYSTEM_LIBS = "${STAGING_LIBDIR}/erlang"

export ERLANG_ERTS = "$(erl -version 2>&1 | gawk '{print $NF}' | tr -d '\n\r')"

joaohf

ReplaceIncludeErts =
fun(Path, Config) ->
    ReplaceRelx(include_erts, Path, Config)
end,

ReplaceSystemLibs =
fun(Path, Config) ->
    ReplaceRelx(system_libs, Path, Config)
end,