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nerves_bootstrap
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Nerves mix integration bootstrap and new project generator
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lib/nerves_bootstrap/aliases.ex
defmodule Nerves.Bootstrap.Aliases do
@moduledoc false
def init() do
with %{} <- Mix.ProjectStack.peek(),
%{name: name, config: config, file: file} <- Mix.ProjectStack.pop(),
nil <- Mix.ProjectStack.peek() do
config =
config
|> host_config()
|> target_config(Nerves.Bootstrap.mix_target())
Mix.ProjectStack.push(name, config, file)
else
# We are not at the top of the stack. Do nothing.
_ ->
:noop
end
end
def host_config(config) do
update_in(config, [:aliases], &add_host_aliases(&1))
end
def target_config(config, :host), do: config
def target_config(config, _target) do
update_in(config, [:aliases], &add_target_aliases(&1))
end
def add_aliases(aliases) do
aliases
|> add_host_aliases()
|> add_target_aliases()
end
def add_host_aliases(aliases) do
aliases
|> append("deps.get", "nerves.deps.get")
|> replace("deps.update", &Nerves.Bootstrap.Aliases.deps_update/1)
end
def add_target_aliases(aliases) do
aliases
|> prepend("deps.loadpaths", "nerves.loadpaths")
|> prepend("deps.compile", "nerves.loadpaths")
|> replace("run", &Nerves.Bootstrap.Aliases.run/1)
end
def run(args) do
case Nerves.Bootstrap.mix_target() do
:host ->
Mix.Tasks.Run.run(args)
target ->
Mix.Nerves.IO.shell_warn("""
You are trying to run code compiled for #{target}
on your host. Please unset MIX_TARGET to run in host mode.
""")
end
end
def deps_update(args) do
Mix.Tasks.Deps.Update.run(args)
Mix.Tasks.Nerves.Deps.Get.run([])
end
defp append(aliases, a, na) do
key = String.to_atom(a)
Keyword.update(aliases, key, [a, na], &(drop(&1, na) ++ [na]))
end
defp prepend(aliases, a, na) do
key = String.to_atom(a)
Keyword.update(aliases, key, [na, a], &[na | drop(&1, na)])
end
defp replace(aliases, a, fun) do
key = String.to_atom(a)
Keyword.update(aliases, key, [fun], &(drop(&1, fun) ++ [fun]))
end
defp drop(aliases, a) do
Enum.reject(aliases, &(&1 === a))
end
end