image-processing

#!/usr/bin/env bash
set -euo pipefail

bin_name="image-processing"
crate_name="nils-image-processing"
args=("$@")

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

mode="${NILS_WRAPPER_MODE:-auto}"
install_prefix="${NILS_WRAPPER_INSTALL_PREFIX:-$HOME/.local/nils-cli}"

if [[ "$install_prefix" == "~" ]]; then
  install_prefix="$HOME"
elif [[ "$install_prefix" == "~/"* ]]; then
  install_prefix="$HOME/${install_prefix#~/}"
fi

if [[ "$mode" != "auto" && "$mode" != "debug" && "$mode" != "installed" ]]; then
  echo "${bin_name}: invalid NILS_WRAPPER_MODE='${mode}' (expected: auto|debug|installed)" >&2
  exit 64
fi

emit_status() {
  if [[ "${NILS_WRAPPER_STATUS_HINTS:-1}" == "0" ]]; then
    return 0
  fi

  echo "$*" >&2
}

is_self_candidate() {
  local candidate="$1"
  [[ -n "$candidate" && -e "$candidate" && "$candidate" -ef "$self_path" ]]
}

resolve_installed() {
  local candidate=""

  candidate="${install_prefix}/${bin_name}"
  if [[ -x "$candidate" ]] && ! is_self_candidate "$candidate"; then
    printf '%s\n' "$candidate"
    return 0
  fi

  candidate="$(command -v "$bin_name" 2>/dev/null || true)"
  if [[ -n "$candidate" && -x "$candidate" ]] && ! is_self_candidate "$candidate"; then
    printf '%s\n' "$candidate"
    return 0
  fi

  return 1
}

run_debug() {
  if command -v cargo >/dev/null 2>&1; then
    emit_status "${bin_name}: exec=cargo mode=${mode} crate=${crate_name} (cargo -q: build may stay silent while compiling)"
    exec cargo run -q -p "$crate_name" -- "${args[@]}"
  fi

  echo "${bin_name}: cargo not found (required when NILS_WRAPPER_MODE=debug)" >&2
  exit 1
}

run_installed() {
  local installed=""
  if installed="$(resolve_installed)"; then
    emit_status "${bin_name}: exec=installed mode=${mode} path=${installed}"
    exec "$installed" "${args[@]}"
  fi

  echo "${bin_name}: installed binary not found (NILS_WRAPPER_MODE=installed)" >&2
  echo "${bin_name}: expected ${install_prefix}/${bin_name} or a PATH entry" >&2
  exit 1
}

case "$mode" in
  debug)
    run_debug
    ;;
  installed)
    run_installed
    ;;
esac

installed=""
if installed="$(resolve_installed)"; then
  emit_status "${bin_name}: exec=installed mode=${mode} path=${installed}"
  exec "$installed" "${args[@]}"
fi

if command -v cargo >/dev/null 2>&1; then
  emit_status "${bin_name}: exec=cargo mode=${mode} crate=${crate_name} (cargo -q: build may stay silent while compiling)"
  exec cargo run -q -p "$crate_name" -- "${args[@]}"
fi

echo "${bin_name}: binary not found (install via cargo install or build the workspace)" >&2
exit 1