Mix v1.6.0-dev mix escript.build View Source
Builds an escript for the project.
An escript is an executable that can be invoked from the command line. An escript can run on any machine that has Erlang installed and by default does not require Elixir to be installed, as Elixir is embedded as part of the escript.
This task guarantees the project and its dependencies are
compiled and packages them inside an escript. Before invoking
mix escript.build, it is only necessary to define a
key with a
:main_module option in your
escript: [main_module: MyApp.CLI]
By default, this task removes documentation and debugging
chunks from the compiled
.beam files to reduce the size of
the escript. If this is not desired, check the
Note: escripts do not support projects and dependencies that need to store or read artifacts from the priv directory.
--force- forces compilation regardless of modification times
--no-compile- skips compilation to .beam files
The following option must be specified in your
:main_module- the module to be invoked once the escript starts. The module must contain a function named
main/1that will receive the command line arguments as binaries.
The remaining options can be specified to further customize the escript:
:name- the name of the generated escript. Defaults to app name.
:path- the path to write the escript to. Defaults to app name.
:app- the app to start with the escript. Defaults to app name. Set it to
nilif no application should be started.
truestrips BEAM code in the escript to remove chunks unnecessary at runtime, such as debug information and documentation. Defaults to
trueembeds Elixir and its children apps (
mix, etc.) mentioned in the
:applicationslist inside the
truefor Elixir projects,
falsefor Erlang projects.
Note: if you set this to
falsefor an Elixir project, you will have to add paths to Elixir’s
ERL_LIBSenvironment variable when running the resulting escript, in order for the code loader to be able to find
:elixirapplication and its children applications (if they are used).
:shebang- shebang interpreter directive used to execute the escript. Defaults to
"#! /usr/bin/env escript\n".
:comment- comment line to follow shebang directive in the escript. Defaults to
:emu_args- emulator arguments to embed in the escript file. Defaults to
There is one project-level option that affects how the escript is generated:
language: :elixir | :erlang- set it to
:erlangfor Erlang projects managed by Mix. Doing so will ensure Elixir is not embedded by default. Your app will still be started as part of escript loading, with the config used during build.
defmodule MyApp.Mixfile do use Mix.Project def project do [ app: :my_app, version: "0.0.1", escript: escript() ] end def escript do [main_module: MyApp.CLI] end end defmodule MyApp.CLI do def main(_args) do IO.puts("Hello from MyApp!") end end