#!/usr/bin/env bash
#
# a simple complement to bild which only deals with launching repls
#
# > repl <target..>
#
# Starts a repl/shell for one or more targets. (Currently, all targets must have
# the same extension for this to work.)
##
  set -e
  targets=${@:?}
  json=$(bild --json ${targets[@]})
  langdeps=$(jq --raw-output '.langdeps | join(" ")' <<< $json)
  exts=$(jq --raw-output '.namespace.ext' <<< $json | sort | uniq)
  case $exts in
    Hs)
      nix-shell \
        --packages "(import $BIZ_ROOT/Biz/Bild.nix {}).private.ghcWith (h: with h; [$langdeps])" \
        --command "ghci -i$BIZ_ROOT -ghci-script $BIZ_ROOT/.ghci ${targets[@]}"
    ;;
    Scm)
      flags=()
      for lib in ${langdeps[@]}; do
        flags+=(--packages "(import $BIZ_ROOT/Biz/Bild.nix {}).private.nixpkgs.guile-${lib}")
      done
      nix-shell \
        --packages "(import $BIZ_ROOT/Biz/Bild.nix {}).private.nixpkgs.guile_3_0" \
        ${flags[@]} \
        --command "guile -L $BIZ_ROOT -C $BIZ_ROOT/_/int --r7rs --listen"
    ;;
    Lisp)
      nix-shell \
        --packages "(import $BIZ_ROOT/Biz/Bild.nix {}).private.sbclWith (p: with p; [asdf swank $langdeps])" \
        --command "sbcl --eval '(require :asdf)' --eval '(require :swank)' --eval '(swank:create-server)' --load $targets"
    ;;
    *)
      echo "unsupported targets: ${targets[@]}"
      exit 1
    ;;
  esac
##