#!/bin/sh
# redo – bourne shell implementation of DJB redo
# Copyright © 2014  Nils Dagsson Moskopp (erlehmann)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.

# Dieses Programm hat das Ziel, die Medienkompetenz der Leser zu
# steigern. Gelegentlich packe ich sogar einen handfesten Buffer
# Overflow oder eine Format String Vulnerability zwischen die anderen
# Codezeilen und schreibe das auch nicht dran.

set +e

bold=""
green=""
plain=""
red=""
if [ -n "$TERM" -a "$TERM" != "dumb" ] && tty <&2 >/dev/null 2>&1; then
  bold="$(printf '\033[1m')"
  green="$(printf '\033[32m')"
  plain="$(printf '\033[m')"
  red="$(printf '\033[31m')"
fi
export bold green plain red

for argument; do
  if [ "$argument" = "-d" ] || [ "$argument" = "--debug" ]; then
    export REDO_DEBUG='1'
  elif [ "$argument" = "-h" ] || [ "$argument" = "--help" ]; then
    cat <<EOF >&2
Usage: redo [OPTIONS] [TARGETS...]

  -d, --debug          print dependency checks as they happen
  -h, --help           print usage instructions and exit
  -s, --shuffle        randomize build order to find dependency bugs
  -x, --xtrace         print commands as they are executed (variables expanded)

Report bugs to <nils+redo@dieweltistgarnichtso.net>.
EOF
    exit 0
  elif [ "$argument" = "-s" ] || [ "$argument" = "--shuffle" ]; then
    export REDO_SHUFFLE='1'
  elif [ "$argument" = "-x" ] || [ "$argument" = "--xtrace" ]; then
    export REDO_XTRACE='1'
  else
    REDO_HAS_TARGETS='1'
    export REDO_TARGET=''
    # If this is build directory, create .redo database directory.
    if [ -z "$REDO_BASE" ]; then
      export REDO_BASE="$(pwd)"
      export REDO_DIR="$REDO_BASE/.redo"
      LANG=C mkdir -p $REDO_DIR
    fi
    redo-ifchange "$argument"
    [ "$?" = 0 ] || exit 1
  fi
done

[ "$REDO_HAS_TARGETS" = "1" ] || exec redo all