Extractly (Extractly v0.5.0) View Source

Provide easy access to information inside the templates rendered by mix xtra

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Functions

Emits a comment including a message not to edit the created file, as it will be recreated from this template.

Returns docstring of a function Ex

Returns docstring of a macro

Returns docstring of a module Ex

Returns the output of a mix task Ex

A convenience method to access this libraries version

Link to this section Functions

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do_not_edit_warning(opts \\ [])

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Emits a comment including a message not to edit the created file, as it will be recreated from this template.

It is a convenience to include this into your templates as follows

      <%= xtra.do_not_edit_warning %>

or I18n'ed

      <%= xtra.do_not_edit_warning, lang: :fr %>

If you are not generating html or markdown the comment can be parametrized

      <%= xtra.do_not_edit_warning, comment_start: "-- ", comment_end: "" %>

If you want to include the name of the source template use template: template option, so a call may be as complex as:

      <%= xtra.do_not_edit_warning, comment_start: "-- ", comment_end: "", template: template, lang: :it %>
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functiondoc(name, opts \\ [])

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Returns docstring of a function Ex:

  iex(0)> {:ok, lines} = Extractly.functiondoc("Extractly.moduledoc/2") |> hd()
  ...(0)> lines |> String.split("\n") |> Enum.take(3)
  ["  Returns docstring of a module", "  Ex:", ""]

We can also pass a list of functions to get their docs concatenated

  iex(1)> [{:ok, moduledoc}, {:error, message}] = Extractly.functiondoc(["Extractly.moduledoc/2", "Extactly.functiondoc/2"])
  ...(1)> moduledoc |> String.split("\n") |> Enum.take(4)
  [ "  Returns docstring of a module",
    "  Ex:",
    "",
    "      Extractly.moduledoc(\"Extractly\")"]
  iex(2)> message
  "Function doc for function Extactly.functiondoc/2 not found"

If all the functions are in the same module the following form can be used

  iex(3)> [{:ok, out}, _] = Extractly.functiondoc(["moduledoc/2", "functiondoc/2"], module: "Extractly")
  ...(3)> String.split(out, "\n") |> hd()
  "  Returns docstring of a module"

However it is convenient to add a markdown headline before each functiondoc, especially in these cases, it can be done by indicating the headline: level option

  iex(4)> [{:ok, moduledoc}, {:ok, functiondoc}] = Extractly.functiondoc(["moduledoc/2", "functiondoc/2"], module: "Extractly", headline: 2)
  ...(4)> moduledoc |> String.split("\n") |> Enum.take(3)
  [ "## Extractly.moduledoc/2",
    "",
    "  Returns docstring of a module"]
  iex(5)> functiondoc |> String.split("\n") |> Enum.take(3)
  [ "## Extractly.functiondoc/2",
    "",
    "  Returns docstring of a function"]

Often times we are interested by all public functiondocs...

  iex(6)> [{:ok, out}|_] = Extractly.functiondoc(:all, module: "Extractly", headline: 2)
  ...(6)> String.split(out, "\n") |> Enum.take(3)
  [ "## Extractly.do_not_edit_warning/1",
    "",
    "  Emits a comment including a message not to edit the created file, as it will be recreated from this template."]

We can specify a language to wrap indented code blocks into ```elixir\n...\n```

Here is an example

  iex(7)> [ok: doc] = Extractly.functiondoc("Extractly.functiondoc/2", wrap_code_blocks: "elixir")
  ...(7)> doc |> String.split("\n") |> Enum.take(10)
  [ "  Returns docstring of a function",
    "  Ex:",
    "",
    "```elixir",
    "      iex(0)> {:ok, lines} = Extractly.functiondoc(\"Extractly.moduledoc/2\") |> hd()",
    "      ...(0)> lines |> String.split(\"\\n\") |> Enum.take(3)",
    "      [\"  Returns docstring of a module\", \"  Ex:\", \"\"]",
    "```",
    "",
    "  We can also pass a list of functions to get their docs concatenated"]
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macrodoc(name, opts \\ [])

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Returns docstring of a macro

Same naming convention for macros as for functions.

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moduledoc(name, opts \\ [])

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Returns docstring of a module Ex:

  Extractly.moduledoc("Extractly")

Returns the output of a mix task Ex:

iex(8)> Extractly.task("cmd", ~W[echo 42])
"42\n"

iex(9)> try do
...(9)>   Extractly.task("xxx")
...(9)> rescue
...(9)>   e in RuntimeError -> e.message |> String.split("\n") |> hd()
...(9)> end
"The following output was produced wih error code 1"

A convenience method to access this libraries version