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cli.ex
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100 lines (84 loc) · 2.42 KB
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defmodule ElixirScript.CLI do
@moduledoc false
@app_version Mix.Project.config()[:version]
@switches [
output: :binary, elixir: :boolean,
help: :boolean, core_path: :binary,
full_build: :boolean, version: :boolean,
watch: :boolean
]
@aliases [
o: :output, ex: :elixir, h: :help, v: :version
]
def main(argv) do
argv
|> parse_args
|> process
end
def parse_args(args) do
parse = OptionParser.parse(args, switches: @switches, aliases: @aliases)
case parse do
{ [help: true] , _ , _ } -> :help
{ [version: true] , _ , _ } -> :version
{ options , [input], _ } -> { input, options }
_ -> :help
end
end
def help_message() do
"""
usage: elixirscript <input> [options]
<input> path to elixir files or
the elixir code string if the -ex flag is used
options:
-o --output [path] places output at the given path
-ex --elixir read input as elixir code string
--full-build informs the compiler to do a full build instead of an incremental one
only used when output is specified
--core-path es6 import path to the elixirscript standard lib
only used with the [output] option. When used, Elixir.js is not exported
-v --version the current version number
-h --help this message
"""
end
def process(:help) do
IO.write help_message
end
def process(:version) do
IO.write @app_version
end
def process({ input, options }) do
if options_contains_unknown_values(options) do
process(:help)
else
do_process(input, options)
end
end
def do_process(input, options) do
{watch, options} = Keyword.pop(options, :watch, false)
compile_opts = %{
include_path: true,
core_path: Keyword.get(options, :core_path, "Elixir.Bootstrap"),
full_build: Keyword.get(options, :full_build, false),
output: Keyword.get(options, :output, :stdout)
}
case options[:elixir] do
true ->
ElixirScript.compile(input, compile_opts)
_ ->
ElixirScript.compile_path(input, compile_opts)
if watch do
ElixirScript.Watcher.start_link(input, compile_opts)
:timer.sleep :infinity
end
end
end
defp options_contains_unknown_values(options) do
Enum.any?(options, fn({key, _value}) ->
if key in Keyword.keys(@switches) do
false
else
true
end
end)
end
end