Igniter installer

(install igniter: mix archive.install hex igniter_new)

you can try
mix igniter.new my_project --install exatomvm@github:petermm/exatomvm && cd my_project

adds dependency and atomvm project config and the start function.

early days in igniter world, but should be good to go.

Signed-off-by: Peter M <[email protected]>

Author: petermm

lib/mix/tasks/ExAtomVM.install.ex

@@ -0,0 +1,91 @@
+defmodule Mix.Tasks.Exatomvm.Install do
+  use Igniter.Mix.Task
+
+  @example "mix igniter.new my_project --install exatomvm@github:atomvm/exatomvm && cd my_project"
+
+  @shortdoc "Add and config AtomVM"
+  @moduledoc """
+  #{@shortdoc}
+
+  ## Example
+
+  ```bash
+  #{@example}
+  ```
+
+  """
+
+  @impl Igniter.Mix.Task
+  def info(_argv, _composing_task) do
+    %Igniter.Mix.Task.Info{
+      # Groups allow for overlapping arguments for tasks by the same author
+      # See the generators guide for more.
+      group: :exatomvm,
+      # dependencies to add
+      adds_deps: [],
+      # dependencies to add and call their associated installers, if they exist
+      installs: [],
+      # An example invocation
+      example: @example,
+      # A list of environments that this should be installed in.
+      only: nil,
+      # a list of positional arguments, i.e `[:file]`
+      positional: [],
+      # Other tasks your task composes using `Igniter.compose_task`, passing in the CLI argv
+      # This ensures your option schema includes options from nested tasks
+      composes: [],
+      # `OptionParser` schema
+      schema: [],
+      # Default values for the options in the `schema`
+      defaults: [],
+      # CLI aliases
+      aliases: [],
+      # A list of options in the schema that are required
+      required: []
+    }
+  end
+
+  @impl Igniter.Mix.Task
+  def igniter(igniter) do
+    Igniter.update_elixir_file(igniter, "mix.exs", fn zipper ->
+      with {:ok, zipper} <- Igniter.Code.Function.move_to_def(zipper, :project, 0),
+           {:ok, zipper} <-
+             Igniter.Code.Keyword.put_in_keyword(
+               zipper,
+               [:atomvm],
+               start: Igniter.Project.Module.module_name_prefix(igniter),
+               esp32_flash_offset: 0x250000,
+               stm32_flash_offset: 0x8080000,
+               chip: "auto",
+               port: "auto"
+             ) do
+        {:ok, zipper}
+      end
+    end)
+    |> Igniter.Project.Module.find_and_update_module!(
+      Igniter.Project.Module.module_name_prefix(igniter),
+      fn zipper ->
+        case Igniter.Code.Function.move_to_def(zipper, :start, 0) do
+          :error ->
+            # start not available
+            zipper =
+              Igniter.Code.Common.add_code(
+                zipper,
+                """
+                def start do
+                  IO.inspect("Hello AtomVM!")
+                  :ok
+                end
+                """,
+                :before
+              )
+
+            {:ok, zipper}
+
+          _ ->
+            {:ok, zipper}
+        end
+      end
+    )
+  end
+end

mix.exs

@@ -21,7 +21,8 @@ defmodule ExAtomVM.MixProject do
   # Run "mix help deps" to learn about dependencies.
   defp deps do
     [
-      {:uf2tool,  "1.1.0"}
+      {:uf2tool, "1.1.0"},
+      {:igniter, "~> 0.4"}
       # {:dep_from_hexpm, "~> 0.3.0"},
       # {:dep_from_git, git: "https://github.com/elixir-lang/my_dep.git", tag: "0.1.0"}
     ]