#! /bin/sh
set -euf
main() {
  case "$PWD" in
    "$HOME/src/"[0-9A-Za-z-]*)
      name=$(basename "$PWD")
      exe=$(findexe "$name" | highest_version)
      if test -z "$exe"; then
        echo2 "load-env-$name: no such executable"
      else
        echo2 "run $exe"
        exec "$exe" "$@"
      fi
      ;;
    "$HOME/src/"*) echo2 "bad basename: $(basename "$PWD")";;
    *) echo2 "load-env only knows about stuff below ~/src";;
  esac
  exit 23
}
echo2() { echo "$*" >&2; }
findexe() {
  ( IFS=:
    find $PATH \
        -regextype posix-extended \
        -regex ".*/load-env-$1(-[0-9.]+)?$" \
        2>/dev/null )
}
highest_version() {
  sort -V | tail -n 1
}
main "$@"