build

#!/usr/bin/env bash

cd "$(dirname "$0")"

# ed keeps its text in ed/1-buffer and nowhere else: every layer above asks
# through rows/line/lineLen/mapLine and never names lines itself. tangle
# stitches ed into one package, so nothing in Go holds that line — this does.
# ed/N-*/ is the layers, however deep; the tangled ed/main.go is not one.
shopt -s globstar nullglob
stray=$(grep -n '\.lines' ed/[0-9]-*/**/*.go | grep -v '^ed/1-buffer/')
if [ -n "$stray" ]; then
	echo "build: ed/1-buffer's lines reached from outside it:" >&2
	echo "$stray" >&2
	exit 1
fi

mkdir -p bin
cp sh/* bin/
[ -x bin/tangle ] || go build -o bin/tangle tangle/main.go
t=(tangle fm ed)
[ $# -gt 0 ] && t=("$@")
for x in "${t[@]}"; do
	(cd "$x" && ../bin/tangle && go build -o "../bin/$x" main.go)
done