onyx

#!/usr/bin/env bash

################## https://github.com/mkropat/sh-realpath #####################
#
# The MIT License (MIT)
#
# Copyright (c) 2014 Michael Kropat
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.

realpath() {
    canonicalize_path "$(resolve_symlinks "$1")"
}

resolve_symlinks() {
    _resolve_symlinks "$1"
}

_resolve_symlinks() {
    _assert_no_path_cycles "$@" || return

    local dir_context path
    path=$(readlink -- "$1")
    if [ $? -eq 0 ]; then
        dir_context=$(dirname -- "$1")
        _resolve_symlinks "$(_prepend_dir_context_if_necessary "$dir_context" "$path")" "$@"
    else
        printf '%s\n' "$1"
    fi
}

_prepend_dir_context_if_necessary() {
    if [ "$1" = . ]; then
        printf '%s\n' "$2"
    else
        _prepend_path_if_relative "$1" "$2"
    fi
}

_prepend_path_if_relative() {
    case "$2" in
        /* ) printf '%s\n' "$2" ;;
         * ) printf '%s\n' "$1/$2" ;;
    esac
}

_assert_no_path_cycles() {
    local target path

    target=$1
    shift

    for path in "$@"; do
        if [ "$path" = "$target" ]; then
            return 1
        fi
    done
}

canonicalize_path() {
    if [ -d "$1" ]; then
        _canonicalize_dir_path "$1"
    else
        _canonicalize_file_path "$1"
    fi
}

_canonicalize_dir_path() {
    (cd "$1" 2>/dev/null && pwd -P)
}

_canonicalize_file_path() {
    local dir file
    dir=$(dirname -- "$1")
    file=$(basename -- "$1")
    (cd "$dir" 2>/dev/null && printf '%s/%s\n' "$(pwd -P)" "$file")
}

##############################################################################

# Based on http://stackoverflow.com/a/2108540/2199687
remove_path_item() {
  local path item work

  path="$1"
  item="$2"

  work=":$path:"
  work="${work/:$item:/:}"
  work="${work%:}"
  work="${work#:}"

  echo "$work"
}

##############################################################################

SCRIPT_PATH="$(realpath "$0")"
SCRIPT_ROOT="$(dirname "$SCRIPT_PATH")"
CRYSTAL_ROOT="$(dirname "$SCRIPT_ROOT")"
CRYSTAL_DIR="$CRYSTAL_ROOT/.build"

export CRYSTAL_PATH=$CRYSTAL_ROOT/src:libs

if [ -x "$CRYSTAL_DIR/onyx" ]
then
  # echo -e "\x1B[33mUsing compiled compiler at .build/onyx\x1B[0m"
  exec "$CRYSTAL_DIR/onyx" "$@"
elif ! command -v onyx > /dev/null
then
  echo -e "\x1B[31mYou need to have a onyx executable in your path!\x1B[0m" 1>&2
  exit 1
elif [ "$(command -v onyx)" = "$SCRIPT_PATH" ] || [ "$(command -v onyx)" = "bin/onyx" ]
then
  export PATH="$(remove_path_item "$(remove_path_item "$PATH" "$SCRIPT_ROOT")" "bin")"
  exec "$SCRIPT_PATH" "$@"
else
  exec onyx "$@"
fi