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Build and Deploy Elixir releases to Kubernetes via Helm

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mandrag lib mix tasks mandrag.upgrade.hot.ex
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lib/mix/tasks/mandrag.upgrade.hot.ex 

defmodule Mix.Tasks.Mandrag.Upgrade.Hot do

  use Mix.Task

  import Mandrag



  def run(_) do

    message "Performing hot upgrade. Updating #{name} to #{version}."

    upgrade(location)

    run_command("upgrade '#{version}'")

  end



  defp upgrade(:local) do

    ssh "mkdir #{name}/releases/#{version}"

    scp "rel/#{name}/releases/#{version}/#{name}.tar.gz", "#{name}/releases/#{version}/#{name}.tar.gz"

  end



  defp upgrade(:remote) do

    ssh "mkdir #{name}/run/releases/#{version}"

    ssh "cp #{name}/rel/#{name}/releases/#{version}/#{name}.tar.gz #{name}/run/releases/#{version}/"

    scp "config/prod.secret.exs", "#{name}/config/prod.secret.exs"

  end

end