Starts a task for parallel compilation.

If you have a file that needs to compile other modules in parallel, the spawned processes need to be aware of the compiler environment. This function allows a developer to create a task that is aware of those environments.

See Task.async/1 for more information. The task spawned must be always awaited on by calling Task.await/1

Compiles the given files.

Those files are compiled in parallel and can automatically detect dependencies between them. Once a dependency is found, the current file stops being compiled until the dependency is resolved.

It returns {:ok, modules, warnings} or {:error, errors, warnings}.

Both errors and warnings are a list of three-element tuples containing the file, line and the formatted error/warning.

Options

• :each_file - for each file compiled, invokes the callback passing the file

• :each_long_compilation - for each file that takes more than a given timeout (see the :long_compilation_threshold option) to compile, invoke this callback passing the file as its argument

• :each_module - for each module compiled, invokes the callback passing the file, module and the module bytecode

• :each_cycle - after the given files are compiled, invokes this function that should return the following values:

  • {:compile, modules} - to continue compilation with a list of further modules to compile
  • {:runtime, modules} - to stop compilation and verify the list of modules because dependent modules have changed

• :long_compilation_threshold - the timeout (in seconds) after the :each_long_compilation callback is invoked; defaults to 15

• :profile - if set to :time measure the compilation time of each compilation cycle and group pass checker

• :dest - the destination directory for the BEAM files. When using compile/2, this information is only used to properly annotate the BEAM files before they are loaded into memory. If you want a file to actually be written to dest, use compile_to_path/3 instead.

• :beam_timestamp - the modification timestamp to give all BEAM files

Requires the given files in parallel.

Opposite to compile, dependencies are not attempted to be automatically solved between files.

It returns {:ok, modules, warnings} or {:error, errors, warnings}.

Both errors and warnings are a list of three-element tuples containing the file, line and the formatted error/warning.

Options

• :each_file - for each file compiled, invokes the callback passing the file

• :each_module - for each module compiled, invokes the callback passing the file, module and the module bytecode