defmodule Mix.Tasks.Pandoc do
@moduledoc """
Invokes pandoc with the given args.
Usage:
$ mix pandoc TASK_OPTIONS PROFILE PANDOC_ARGS
Example:
$ mix pandoc default documents/hello.md -o priv/static/posts/hello.html
If pandoc is not installed, it is automatically downloaded. Note the
arguments given to this task will be appended to any configured arguments.
## Options
* `--runtime-config` - load the runtime configuration
before executing command
Note flags to control this Mix task must be given before the profile:
$ mix pandoc --runtime-config default documents/hello.md
"""
@shortdoc "Invokes pandoc with the profile and args"
@compile {:no_warn_undefined, Mix}
use Mix.Task
@impl true
def run(args) do
switches = [runtime_config: :boolean]
{opts, remaining_args} = OptionParser.parse_head!(args, switches: switches)
if function_exported?(Mix, :ensure_application!, 1) do
Mix.ensure_application!(:inets)
Mix.ensure_application!(:ssl)
end
if opts[:runtime_config] do
Mix.Task.run("app.config")
else
Mix.Task.run("loadpaths")
Application.ensure_all_started(:pandoc)
end
Mix.Task.reenable("pandoc")
install_and_run(remaining_args)
end
defp install_and_run([profile | args] = all) do
case Pandoc.install_and_run(String.to_atom(profile), args) do
0 -> :ok
status -> Mix.raise("`mix pandoc #{Enum.join(all, " ")}` exited with #{status}")
end
end
defp install_and_run([]) do
Mix.raise("`mix pandoc` expects the profile as argument")
end
end