#!/usr/bin/env bash
# Shim that caps ninja's parallelism before handing off to the real binary.
#
# `flutter run`/`flutter build` for the linux target invoke bare `ninja -C
# <dir> install` with no -j flag (flutter_tools gives no way to pass one), so
# ninja defaults to nproc+2 concurrent compile/link jobs. On this machine
# (6 cores, 7.6GiB RAM) that's enough parallel clang jobs -- especially
# linking the sqlite3 amalgamation with debug info -- to trip systemd-oomd
# well before swap fills up. Capping jobs here keeps `task` usable without
# patching flutter_tools.
#
# Override with NINJA_JOBS=N if this box has more headroom.
set -euo pipefail

self_dir=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)

real_ninja=""
IFS=':' read -ra path_dirs <<< "$PATH"
for dir in "${path_dirs[@]}"; do
  if [[ "$dir" != "$self_dir" && -x "$dir/ninja" ]]; then
    real_ninja="$dir/ninja"
    break
  fi
done

if [[ -z "$real_ninja" ]]; then
  echo "ninja-jcap: couldn't find a real ninja later in PATH" >&2
  exit 1
fi

exec "$real_ninja" -j "${NINJA_JOBS:-2}" "$@"