#!/bin/sh
# Alternative to build0 that supports a --until flag to include only a subset
# of layers.
#   $ ./build1 --until 050
UNTIL_LAYER=${2:-zzz}

set -v
set -e  # stop immediately on error

# Some environment variables that can be passed in. For example, to turn off
# optimization:
#   $ CFLAGS=-g ./build1
test "$CXX" || export CXX=c++
test "$CC" || export CC=cc
test "$CFLAGS" || export CFLAGS="-g -O3"
export CFLAGS="$CFLAGS -Wall -Wextra -ftrapv -fno-strict-aliasing"

# Outline:
# [0-9]*.cc -> mu.cc -> mu_bin
# (layers)   |        |
#          tangle   $CXX

$CXX $CFLAGS enumerate/enumerate.cc -o enumerate/enumerate

cd tangle
  # auto-generate various lists (ending in '_list' by convention) {
  # list of types
  {
    grep -h "^struct .* {" [0-9]*.cc  |sed 's/\(struct *[^ ]*\).*/\1;/'
    grep -h "^typedef " [0-9]*.cc
  }  > type_list
  # list of function declarations, so I can define them in any order
  grep -h "^[^ #].*) {" [0-9]*.cc  |sed 's/ {.*/;/'  > function_list
  # list of code files to compile
  ls [0-9]*.cc  |grep -v "\.test\.cc$"  |sed 's/.*/#include "&"/'  > file_list
  # list of test files to compile
  ls [0-9]*.test.cc  |sed 's/.*/#include "&"/'  > test_file_list
  # list of tests to run
  grep -h "^[[:space:]]*void test_" [0-9]*.cc  |sed 's/^\s*void \(.*\)() {$/\1,/'  > test_list
  # }
  # Now that we have all the _lists, compile 'tangle'
  $CXX $CFLAGS boot.cc -o tangle
cd ..

cd termbox
  $CC $CFLAGS -c termbox.c
  $CC $CFLAGS -c utf8.c
  ar rcs libtermbox.a *.o
cd ..

LAYERS=$(./enumerate/enumerate --until $UNTIL_LAYER  |grep '\.cc$')
./tangle/tangle $LAYERS  > mu.cc
# auto-generate function declarations, so I can define them in any order
# functions start out unindented, have all args on the same line, and end in ') {'
#
#                                      \/ ignore methods
grep -h "^[^[:space:]#].*) {$" mu.cc  |grep -v ":.*("  |sed 's/ {.*/;/'  > function_list
# auto-generate list of tests to run
grep -h "^\s*void test_" mu.cc  |sed 's/^\s*void \(.*\)() {.*/\1,/'  > test_list
$CXX $CFLAGS mu.cc termbox/libtermbox.a -o mu_bin

## [0-9]*.mu -> core.mu

MU_LAYERS=$(./enumerate/enumerate --until $UNTIL_LAYER  |grep '\.mu$') || exit 0  # ok if no .mu files
cat $MU_LAYERS  > core.mu