effektivecompile2riscv: A Compiler for Risc-V written in Effekt

Credits: This project uses the following effekt project template: https://github.com/jiribenes/effekt-template

Table of contents

• Setup for testing the riscv assembly code
• Useful commands
  • Effekt commands
  • Nix-related commands
• Repository structure
• CI

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Setup for testing the riscv assembly code

To be able to run the binaries you have to follow these steps:

1. Install the RiscV toolchain: https://github.com/riscv-collab/riscv-gnu-toolchain
   Wichtig: Es wird die ELF Version mit newlib benötigt.
2. Install an Emulator like Quemu: https://www.qemu.org/download/
3. Run the following commands to run a test riscv assembly:

riscv64-unknown-elf-as -o test.o test.s

riscv64-unknown-elf-gcc -o test test.o

./test 
# or if you dont have qemu-user-binfmt installed 
#qemu-riscv64 ./test

Overview

A project overview can be found here.

Useful commands

Effekt commands

Run the main file:

effekt src/main.effekt

This (like many other Effekt commands) uses the JavaScript backend by default. To use a different backend, add the --backend <backend> flag.

Run the tests:

effekt src/test.effekt

Open the REPL:

effekt

Build the project:

effekt --build src/main.effekt

This builds the project into the out/ directory, creating a runnable file out/main.

To see all available options and backends, run:

effekt --help

Nix-related commands

While Nix installation is optional, it provides several benefits:

Update dependencies (also runs automatically in CI):

nix flake update

Open a shell with all necessary dependencies:

nix develop

Run the main entry point:

nix run

Build the project (output in result/bin/):

nix build

Repository structure

• .github/workflows/*.yml: Contains the CI definitions
• src/: Contains the source code
  • main.effekt: Main entry point
  • test.effekt: Entry point for tests
  • lib.effekt: Library code imported by main and test
• flake.nix: Package configuration in a Nix flake
• flake.lock: Auto-generated lockfile for dependencies
• LICENSE: Project license
• README: This README file

CI

Two GitHub Actions are set up:

1. flake-check:

   • Checks the flake.nix file, builds and tests the project
   • Runs on demand, on main, and on PRs
   • To run custom commands, add a step using:
     • nix run -- <ARGS> to run the main entry point with the given arguments
     • nix develop -c '<bash command to run>' to run commands in the correct environment

2. update-flake-lock:

   • Updates package versions in flake.nix
   • Runs on demand and weekly (Tuesdays at 00:00 UTC)