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26 changes: 21 additions & 5 deletions lib/caramel.ex
Original file line number Diff line number Diff line change
Expand Up @@ -12,16 +12,32 @@ defmodule Caramel do
IO.puts("🍬 Using Caramel #{version}")
end

def compile([]), do: :ok
def compile(files) do
def compile(files, opts \\ [])
def compile([], _opts), do: :ok
def compile(files, opts) do
bin = Path.expand(@caramel_bin)
Mix.Shell.cmd(
"#{@caramel_bin} compile " <> Enum.join(files, " "),
[],
"#{bin} compile " <> Enum.join(files, " "),
opts,
fn res -> IO.puts(res) end
)

target_dir = Path.join(opts[:cd] || ".", "src")

if not File.dir?(target_dir) do
Mix.raise "caramel: target dir `#{target_dir}` is not a diretory"
end


# move the given files to target directory
basedir = Path.dirname(target_dir)
erlfiles =
for file <- files do
Path.join(basedir, Path.basename(file, Path.extname(file)) <> ".erl")
end

Mix.Shell.cmd(
"mv *.erl src",
"mv #{Enum.join(erlfiles, " ")} #{target_dir}",
[],
fn _ -> :ok end
)
Expand Down
5 changes: 5 additions & 0 deletions lib/caramel/installer.ex
Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,11 @@ defmodule Caramel.Installer do
def download_caramel(version, tarball_name, release_url) do
IO.puts("📦 Installing Caramel #{version}...")
Mix.Shell.cmd("wget " <> release_url, [], fn _ -> :ok end)

if not File.exists?(tarball_name) do
Mix.raise("carmel: failed to download release tarball for #{version}.")
end

Mix.Shell.cmd("tar -xzf " <> tarball_name, [], fn _ -> :ok end)
Mix.Shell.cmd("rm " <> tarball_name, [], fn _ -> :ok end)
Mix.Shell.cmd("mv caramel _build/", [], fn _ -> :ok end)
Expand Down
72 changes: 67 additions & 5 deletions lib/mix/tasks/compiler/caramel.ex
Original file line number Diff line number Diff line change
@@ -1,13 +1,75 @@
defmodule Mix.Tasks.Compile.Caramel do
use Mix.Task.Compiler

require Logger

def run(_) do
project = Mix.Project.config()
source_paths = project[:caramel_paths]
version = project[:caramel_release]
:ok = Caramel.ensure_version(version)
version = project[:caramel_release] || current_version

# If we're running in an umbrella project we need to specify exactly
# where each source file it within apps path. This has the sideeffect
# of compiling all files accross all umbrella projects instead of
# compiling one by one
if Mix.Project.umbrella?(project) do
for {_app, path} <- Mix.Project.apps_paths(project) do
compile(version, sources: project[:caramel_paths], path: path)
end
:ok
else
:ok = compile(version, sources: project[:caramel_paths])
end
end

defp compile(version, opts \\ []) do
source_paths = opts[:source] || ["src"]

if nil == source_paths do
Mix.raise("Caramel configuration error: `caramel_paths` not set in mix.config")
end

if nil == version do
Mix.raise("Caramel configuration error: `caramel_release` not set in mix.config")
end


Mix.Compilers.Erlang.assert_valid_erlc_paths(source_paths)
files = Mix.Utils.extract_files(source_paths, [:ml, :mli, :re, :rei])
:ok = Caramel.compile(files)

if opts[:path] do
len = byte_size(opts[:path])
source_paths = for s <- source_paths, do: Path.join(opts[:path], s)
files = Mix.Utils.extract_files(source_paths, [:ml, :mli, :re, :rei])

if files != source_paths do
files =
for f <- files do
<<_ :: binary-size(len), "/", file :: binary()>> = f
file
end

if files != [] do
:ok = Caramel.ensure_version(version)
end

Caramel.compile(files, cd: opts[:path])
end
else
files = Mix.Utils.extract_files(source_paths, [:ml, :mli, :re, :rei])

if files != [] do
:ok = Caramel.ensure_version(version)
end

Caramel.compile(files)
end


end

defp current_version() do
case System.shell("command -v caramel > /dev/null && caramel version") do
{"v" <> _ = buf, 0} -> List.last(String.split(buf))
_ -> nil
end
end
end