From b8d8b3dbd88ab42fc8f050af0d18fc4dd66d7ffe Mon Sep 17 00:00:00 2001
From: Catalin Mititiuc
Date: Thu, 9 Jan 2025 11:25:52 -0800
Subject: Handle installing Pandoc
---
lib/mix/tasks/pandoc.install.ex | 70 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 70 insertions(+)
create mode 100644 lib/mix/tasks/pandoc.install.ex
(limited to 'lib/mix/tasks/pandoc.install.ex')
diff --git a/lib/mix/tasks/pandoc.install.ex b/lib/mix/tasks/pandoc.install.ex
new file mode 100644
index 0000000..1e36696
--- /dev/null
+++ b/lib/mix/tasks/pandoc.install.ex
@@ -0,0 +1,70 @@
+defmodule Mix.Tasks.Pandoc.Install do
+ @moduledoc """
+ Installs pandoc under `_build`.
+
+ ```bash
+ $ mix pandoc.install
+ $ mix pandoc.install --if-missing
+ ```
+
+ By default, it installs #{Pandoc.latest_version()} but you can configure it
+ in your config files, such as:
+
+ config :pandoc, :version, "#{Pandoc.latest_version()}"
+
+ ## Options
+
+ * `--runtime-config` - load the runtime configuration before executing
+ command
+
+ * `--if-missing` - install only if the given version does not exist
+ """
+
+ @shortdoc "Installs pandoc under _build"
+ @compile {:no_warn_undefined, Mix}
+
+ use Mix.Task
+
+ @impl true
+ def run(args) do
+ valid_options = [runtime_config: :boolean, if_missing: :boolean]
+
+ {opts, base_url} =
+ case OptionParser.parse_head!(args, strict: valid_options) do
+ {opts, []} ->
+ {opts, Pandoc.default_base_url()}
+
+ {opts, [base_url]} ->
+ {opts, base_url}
+
+ {_, _} ->
+ Mix.raise("""
+ Invalid arguments to pandoc.install, expected one of:
+
+ mix pandoc.install
+ mix pandoc.install 'https://github.com/jgm/pandoc/releases/download/$version/pandoc-$version-$target.tar.gz'
+ mix pandoc.install --runtime-config
+ mix pandoc.install --if-missing
+ """)
+ end
+
+ if opts[:runtime_config], do: Mix.Task.run("app.config")
+
+ if opts[:if_missing] && latest_version?() do
+ :ok
+ else
+ if function_exported?(Mix, :ensure_application!, 1) do
+ Mix.ensure_application!(:inets)
+ Mix.ensure_application!(:ssl)
+ end
+
+ Mix.Task.run("loadpaths")
+ Pandoc.install(base_url)
+ end
+ end
+
+ defp latest_version?() do
+ version = Pandoc.configured_version()
+ match?({:ok, ^version}, Pandoc.bin_version())
+ end
+end
--
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