.envrc

#!/usr/bin/env bash

# This file provides some tooling on an opt-in basis via `direnv`
# (https://direnv.net/)

# To use the functionality here, create an `.envrc.local` file in this folder
# that runs the functions you need.
# There is an example in `.envrc.local.example` you can start with

# `use nvm`
# if `nvm` is installed, use it to select the right node.js version
# as defined in the `.nvmrc` file
use_nvm() {
  local NVM_DIR
  if [[ -z "${XDG_CONFIG_HOME:-}" ]]; then
    NVM_DIR="${HOME}/.nvm"
  else
    NVM_DIR="${XDG_CONFIG_HOME}/nvm"
  fi
  if ! [[ -d "$NVM_DIR" ]]; then
    echo >&2 "ERROR: nvm not found. Could not set the node.js version."
    return 1
  fi

  # shellcheck source=/dev/null
  [[ -s "$NVM_DIR/nvm.sh" ]] && \. "$NVM_DIR/nvm.sh" # This loads nvm
  nvm use
}

# `use ghcup`
# if `ghcup` is available, use it to install and set the GHC version
# as defined in the `.ghcversion` file
use_ghcup() {
  local GHC_VERSION GHCUP_PATH
  GHC_VERSION="$(<.ghcversion)"
  GHCUP_PATH="$(which ghcup)"
  if [[ -z "$GHC_VERSION" ]]; then
    echo >&2 'ERROR: Required GHC version not found.'
    return 1
  fi
  if [[ -z "$GHCUP_PATH" ]]; then
    echo 'ERROR: ghcup not found. Could not set the GHC version.'
    return 1
  fi

  if ! ghcup whereis ghc "$GHC_VERSION" &> /dev/null; then
    ghcup install ghc "$GHC_VERSION"
  fi
  ghcup set ghc "$GHC_VERSION"
}

# this line sources your `.envrc.local` file
source_env_if_exists .envrc.local