idris-lang/Idris2
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Idris2/INSTALL.md
Edwin Brady ad9a2a187f Fix Char casting 
For the same behaviour as Idris 1, the primitive cast should return 0 if
the integer is out of bounds. (We should probably drop the Cast
implementation though, since ideally they won't be lossy in general, but
that's an issue for another time...)

All the tests pass in racket now, for me.
2020-05-23 22:19:10 +01:00

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Installing

The easiest way to install is via the existing generated Scheme code. The requirements are:

  • A Scheme compiler; either Chez Scheme (default), or Racket
  • bash, with realpath. On Linux, you probably already have this. On a Mac, you can install this with brew install coreutils.

On Windows, it has been reported that installing via MSYS2 works (https://www.msys2.org/). On Raspberry Pi, you can bootstrap via Racket.

By default, code generation is via Chez Scheme. You can use Racket instead, by setting the environment variable IDRIS2_CG=racket before running make.

1: Set the PREFIX

  • Change the PREFIX in config.mk. The default is to install in $HOME/.idris2

If you have an existing Idris 2, go to the alternative Step 2. Otherwise, read on...

Make sure that:

  • $PREFIX/bin is in your PATH
  • $PREFIX/lib is in your LD_LIBRARY_PATH or DYLD_LIBRARY_PATH if on macOS (so that the system knows where to look for library support code)

2: Installing without an existing Idris 2

If you don't have Idris-2-in-Idris-1 installed, you can build from pre-built Chez Scheme source, as long as you have Chez Scheme installed (or, alternatively, Racket). To do this, enter one of the following:

  • make bootstrap SCHEME=chez
  • make bootstrap-racket

chez is the executable name of the Chez Scheme compiler. You may need to replace this with the executable for Chez Scheme on your system. This could be scheme, chezscheme or chezscheme9.5 or something else, depending on your system and the Chez Scheme version.

This builds an Idris 2 compiler from scheme code output from a working Idris 2 compiler (which isn't necessarily up to date, but is up to date enough to build the current repository). It then rebuilds using the result, and runs the tests.

If all is well, to install, type:

  • make install

(Alternative 2: Installing with an existing Idris 2)

If you have Idris-2-in-Idris-1 installed:

  • make all IDRIS2_BOOT=idris2boot
  • make install IDRIS2_BOOT=idris2boot

If you have an earlier version of this Idris 2 installer

  • make all
  • make install

3: (Optional) Self-hosting step

As a final step, you can rebuild from the newly installed Idris 2 to verify that everything has worked correctly. Assuming that idris2 is in your PATH.

  • make clean -- to make sure you're building everything with the new version
  • make all && make install

4: Running tests

After make all, type make test to check everything works. This uses the executable in ./build/exec.

5: (Optional) Installing the Idris 2 API

You'll only need this if you're developing support tools, such as an external code generator. To do so, once everything is successfully installed, type:

  • make install-api

The API will only work if you've completed the self-hosting step, step 3, since the intermediate code versions need to be consistent throughout.