#-*-mode:sh;indent-tabs-mode:nil;tab-width:2;coding:utf-8-*-┐
#───vi: set net ft=sh ts=2 sts=2 fenc=utf-8 :vi─────────────┘
#
# OVERVIEW
#
#   GNU Archiver Veneer
#
# DESCRIPTION
#
#   This script wraps normal archive commands that're transparently
#   passed-through. It adds value too, by addressing difficulties
#   that would normally cause a developer to need `make clean`.
#
# EXAMPLE
#
#   build/archive ar rcsD library.a foo.o ...

if [ ! -d o/third_party/gcc ]; then
  third_party/gcc/unbundle.sh
fi

export LC_ALL=C
RM=${RM:-$(command -v rm) -f} || exit
MKDIR=${MKDIR:-$(command -v mkdir) -p} || exit

AR=$1
ARFLAGS=$2
OUT=$3
shift 3

# remove directory arguments (having .a targets depend on dirs is what
# lets them be invalidated by deleted files)
FIRST=1
for x; do
  if [ $FIRST -eq 1 ]; then
    set --
    FIRST=0
  fi
  if [ -d "$x" ]; then
    if [ -f "$OUT" ] && [ "$x" -nt "$OUT" ]; then
      $RM "$OUT"
    fi
    continue
  fi
  if [ "$x" != "${x%.o}" ]; then
    set -- "$@" "$x"
  fi
done

set -- "$AR" "$ARFLAGS" "$OUT" "$@"
printf %s\\n "$*" >"$OUT.cmd"

OUTDIR="${OUT%/*}"
if [ "$OUTDIR" != "$OUT" ] && [ ! -d "$OUTDIR" ]; then
  $MKDIR "$OUTDIR" || exit 2
fi

printf "$LOGFMT" "${ACTION:-ARCHIVE.a}" "$OUT" >&2
# if [ "$SILENT" = "0" ]; then
#   # some of these windows nt archives are quite huge
#   COLUMNS=${COLUMNS:-80}
#   COLUMNS=$((COLUMNS - 4))
#   printf "%s\n" "$*" |
#     /usr/bin/fold -s -w $COLUMNS |
#     sed -e '1bb' -e 's/^/  /' -e ':b' -e '$b' -e 's/$/ \\/' >&2
# else
#   printf "$LOGFMT" "${ACTION:-ARCHIVE.a}" "$OUT" >&2
# fi

REASON=failed
trap REASON=interrupted INT

"$@" >/dev/null && exit

if [ "$TERM" = "dumb" ]; then
  f='%s %s\r\n\r\n'
else
  f='\033[91m%s\033[39m \033[94m%s\033[39m\r\n\r\n'
fi
printf "$f" "archive $REASON:" "$*" >&2
exit 1