#!/usr/bin/env bash

set -eu

dir=$1
if ! [ -d "$dir/sysroot" ]; then
    echo "No such sysroot directory: $dir/sysroot" >&2
    exit 1
fi
title=${2:-$1}

rm -rf $dir.size
cp -r $dir/sysroot $dir.size
(
    cd $dir.size
    find . \
        -name '*.a' \
        -o -name '*.o' \
        -print0 \
    | xargs --null rm
    find . \
        -type d \
        '(' -name include -o -name info -o -name i18n ')' \
        -print0 \
    | xargs --null rm -rf
    strip $(find . -name '*.so' ! -name libc.so ! -name libpthread.so)
    find sbin usr/bin usr/sbin usr/libexec -type f \
         ! -name tzselect ! -name ldd ! -name catchsegv ! -name '[xm]trace' \
    | xargs strip
)

(
    du -s "$dir.size"
    size "$dir.size/lib/libc.so.6"
    echo $title
) \
| awk '
  NR == 1 { treekiB = $1 }
  NR == 3 { libcB = $4 }
  NR == 4 {
    sub (/option-groups-/, "");
    sub (/\.config/, "");
    sub (/no-OPTION_EGLIBC_/, "");
    title = $0
  }
  END {
# full_treekiB = 94756 # with locale data
full_treekiB = 31236 # without locale data
full_libcB = 1254017.0
print treekiB, libcB
printf "%-40s", title
printf "%2.1f MiB (%3.0f%%)  ", treekiB / 1024, (treekiB * 100 / full_treekiB)
printf "%4.0f KiB (%3.0f%%)  ", libcB / 1024, (libcB * 100 / full_libcB)
printf "\n"
  }
'