#!/usr/bin/env bash
#
# a simple complement to bild which only deals with launching repls
#
# > repl <target>
#
# Starts a repl/shell for target.
#
#  - if target.hs, load ghci
#  - TODO: if target.scm, load scheme repl
#  - TODO: if target.nix, load 'nix repl'
##
  set -e
  target=${1:?}
  json=$(bild --json "$target")
  langdeps=$(jq --raw-output '.[].langdeps | join(" ")' <<< $json)
  case $target in
    *.hs)
       nix-shell \
         --packages "(import $BIZ_ROOT/Biz/Bild.nix {}).ghcWith (h: with h; [$langdeps])" \
         --command "ghci -i$BIZ_ROOT -ghci-script $BIZ_ROOT/.ghci $target"
    ;;
    *.scm)
      echo "scheme repl not supported yet: $target"
      exit 1
    ;;
    *)
      echo "unsupported target: $target"
      exit 1
    ;;
  esac
##