jpp

#!/usr/bin/env bash
# jpp — write J++, run it on the FPGA. No hex, no python commands.
#
#   ./jpp                 REPL: type code, then  /run  to run it on the board
#   ./jpp program.jpp     compile + run a file
#
# REPL commands:  /run  /show  /clear  /quit
# Env: READ=N  (# reply bytes to read, default 2 = one per core)
set -euo pipefail
cd "$(dirname "$0")"
SW=software
READ=${READ:-2}
TMP=$(mktemp -d); trap 'rm -rf "$TMP"' EXIT

run_program() {   # $1 = J++ source file
  if ! ( cd "$SW" && cargo run --quiet --bin jpp -- "$1" "$TMP/p.asm" >/dev/null 2>"$TMP/err" \
                  && cargo run --quiet -- "$TMP/p.asm" "$TMP/p.hex" >/dev/null 2>>"$TMP/err" ); then
    echo "compile error:"; cat "$TMP/err"; return 1
  fi
  local out
  out=$( cd "$SW" && python3 send_kernel.py "$TMP/p.hex" --read "$READ" 2>&1 )
  if echo "$out" | grep -q decimal; then
    echo "$out" | sed -n 's/.*decimal *: */→ /p'   # just the reply, e.g. "→  42  42"
  else
    echo "$out"                                     # board error / timeout: show it
  fi
}

# File mode
if [ $# -ge 1 ]; then run_program "$1"; exit $?; fi

# REPL mode
echo "J++ REPL — type code, /run to run on the FPGA, /show, /clear, /quit"
: > "$TMP/buf.jpp"
while IFS= read -rep "jpp> " line; do
  case "$line" in
    /run)        run_program "$TMP/buf.jpp" || true ;;
    /show)       cat "$TMP/buf.jpp" ;;
    /clear)      : > "$TMP/buf.jpp"; echo "(cleared)" ;;
    /quit|/exit) break ;;
    "")          ;;
    /*)          echo "commands: /run /show /clear /quit" ;;
    *)           printf '%s\n' "$line" >> "$TMP/buf.jpp" ;;
  esac
done