Idris includes a simple build system for building packages and executables from a named package description file. These files can be used with the Idris compiler to manage the development process .

Package Descriptions

A package description includes the following:

  • A header, consisting of the keyword package followed by the package name.
  • Fields describing package contents, <field> = <value>

At least one field must be the modules field, where the value is a comma separated list of modules. For example, given an idris package maths that has modules Maths.idr, Maths.NumOps.idr, Maths.BinOps.idr, and Maths.HexOps.idr, the corresponding package file would be:

package maths

modules = Maths
        , Maths.NumOps
        , Maths.BinOps
        , Maths.HexOps

Other examples of package files can be found in the libs directory of the main Idris repository, and in third-party libraries. More details including a complete listing of available fields can be found in Packages.

Using Package files

Given an Idris package file maths.ipkg it can be used with the Idris compiler as follows:

  • idris --build maths.ipkg will build all modules in the package
  • idris --install maths.ipkg will install the package, making it accessible by other Idris libraries and programs.
  • idris --clean maths.ipkg will delete all intermediate code and executable files generated when building.
  • idris --mkdoc maths.ipkg will build HTML documentation for your package in the folder maths_doc in your project’s root directory.
  • idris --checkpkg maths.ipkg will type check all modules in the package only. This differs from build that type checks and generates code.
  • idris --testpkg maths.ipkg will compile and run any embedded tests you have specified in the tests paramater. More information about testing is given in the next section.

Once the maths package has been installed, the command line option --package maths makes it accessible (abbreviated to -p maths). For example:

idris -p maths Main.idr