/
compile.elixir.ex
123 lines (99 loc) · 3.82 KB
/
compile.elixir.ex
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defmodule Mix.Tasks.Compile.Elixir do
use Mix.Task.Compiler
@recursive true
@manifest "compile.elixir"
@moduledoc """
Compiles Elixir source files.
Elixir is smart enough to recompile only files that have changed
and their dependencies. This means if `lib/a.ex` is invoking
a function defined over `lib/b.ex`, whenever `lib/b.ex` changes,
`lib/a.ex` is also recompiled.
Note it is important to recompile a file's dependencies as
there are often compile time dependencies between them.
## Command line options
* `--verbose` - prints each file being compiled
* `--force` - forces compilation regardless of modification times
* `--docs` (`--no-docs`) - attaches (or not) documentation to compiled modules
* `--debug-info` (`--no-debug-info`) - attaches (or not) debug info to compiled modules
* `--ignore-module-conflict` - does not emit warnings if a module was previously defined
* `--warnings-as-errors` - treats warnings in the current project as errors and
return a non-zero exit code
* `--long-compilation-threshold N` - sets the "long compilation" threshold
(in seconds) to `N` (see the docs for `Kernel.ParallelCompiler.compile/2`)
* `--profile` - if set to `time`, outputs timing information of compilation steps
* `--all-warnings` - prints warnings even from files that do not need to be recompiled
* `--tracer` - adds a compiler tracer in addition to any specified in the `mix.exs` file
## Configuration
* `:elixirc_paths` - directories to find source files.
Defaults to `["lib"]`.
* `:elixirc_options` - compilation options that apply to Elixir's compiler.
See `Code.put_compiler_option/2` for a complete list of options. These
options are often overridable from the command line using the switches
above.
"""
@switches [
force: :boolean,
docs: :boolean,
warnings_as_errors: :boolean,
ignore_module_conflict: :boolean,
debug_info: :boolean,
verbose: :boolean,
long_compilation_threshold: :integer,
profile: :string,
all_warnings: :boolean,
tracer: :keep
]
@impl true
def run(args) do
{opts, _, _} = OptionParser.parse(args, switches: @switches)
project = Mix.Project.config()
dest = Mix.Project.compile_path(project)
srcs = project[:elixirc_paths]
unless is_list(srcs) do
Mix.raise(":elixirc_paths should be a list of paths, got: #{inspect(srcs)}")
end
manifest = manifest()
configs = [Mix.Project.config_mtime() | Mix.Tasks.Compile.Erlang.manifests()]
force = opts[:force] || Mix.Utils.stale?(configs, [manifest])
opts =
(project[:elixirc_options] || [])
|> Keyword.merge(opts)
|> xref_exclude_opts(project)
|> tracers_opts()
|> profile_opts()
Mix.Compilers.Elixir.compile(manifest, srcs, dest, [:ex], force, opts)
end
@impl true
def manifests, do: [manifest()]
defp manifest, do: Path.join(Mix.Project.manifest_path(), @manifest)
@impl true
def clean do
dest = Mix.Project.compile_path()
Mix.Compilers.Elixir.clean(manifest(), dest)
end
# TODO: Deprecate project[:xref][:exclude] in v1.14
defp xref_exclude_opts(opts, project) do
exclude = List.wrap(project[:xref][:exclude])
if exclude == [] do
opts
else
Keyword.update(opts, :no_warn_undefined, exclude, &(List.wrap(&1) ++ exclude))
end
end
defp tracers_opts(opts) do
case Keyword.pop_values(opts, :tracer) do
{[], opts} ->
opts
{tracers, opts} ->
tracers = Enum.map(tracers, &Module.concat([&1]))
Keyword.update(opts, :tracers, tracers, &(tracers ++ &1))
end
end
defp profile_opts(opts) do
case Keyword.fetch(opts, :profile) do
{:ok, "time"} -> Keyword.put(opts, :profile, :time)
{:ok, _} -> Keyword.delete(opts, :profile)
:error -> opts
end
end
end