nex-pkg 0.8.2

Package manager UX for nix-darwin + homebrew
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#!/usr/bin/env bash
# Mock brew binary for integration tests.
# Handles: --version, info, list, leaves
set -euo pipefail

# Exit immediately if brew is supposed to be unavailable
if [[ "${MOCK_BREW_UNAVAILABLE:-}" == "1" ]]; then
  exit 127
fi

# Cask database: name → version
declare -A CASKS=(
  [firefox]="128.0.3"
  [slack]="4.39.0"
  [spotify]="1.2.40"
  [docker]="4.30.0"
  [visual-studio-code]="1.89.1"
)

# Formula database: name → version
declare -A FORMULAE=(
  [wget]="1.24.5"
  [rustup]="1.27.1"
  [cmake]="3.29.3"
)

# Installed casks (simulate what's on disk)
INSTALLED_CASKS=(slack spotify docker)

# Installed formula leaves (top-level, not deps)
INSTALLED_LEAVES=(wget rustup cmake)

cmd="${1:-}"

case "$cmd" in
  --version)
    echo "Homebrew 4.4.0"
    exit 0
    ;;

  info)
    shift
    json_flag=false
    kind=""
    pkg=""
    for arg in "$@"; do
      case "$arg" in
        --json=v2) json_flag=true ;;
        --cask)    kind="cask" ;;
        --formula) kind="formula" ;;
        *)         pkg="$arg" ;;
      esac
    done

    if [[ "$kind" == "cask" ]]; then
      if [[ -n "${CASKS[$pkg]+set}" ]]; then
        ver="${CASKS[$pkg]}"
        cat <<EOF
{"casks":[{"token":"${pkg}","version":"${ver}","name":["${pkg}"],"desc":"Mock cask"}]}
EOF
        exit 0
      else
        exit 1
      fi
    elif [[ "$kind" == "formula" ]]; then
      if [[ -n "${FORMULAE[$pkg]+set}" ]]; then
        ver="${FORMULAE[$pkg]}"
        cat <<EOF
{"formulae":[{"name":"${pkg}","versions":{"stable":"${ver}"},"desc":"Mock formula"}]}
EOF
        exit 0
      else
        exit 1
      fi
    fi
    exit 1
    ;;

  list)
    shift
    kind=""
    for arg in "$@"; do
      case "$arg" in
        --cask)    kind="cask" ;;
        --formula) kind="formula" ;;
      esac
    done

    if [[ "$kind" == "cask" ]]; then
      printf '%s\n' "${INSTALLED_CASKS[@]}"
    elif [[ "$kind" == "formula" ]]; then
      printf '%s\n' "${INSTALLED_LEAVES[@]}"
    fi
    exit 0
    ;;

  leaves)
    printf '%s\n' "${INSTALLED_LEAVES[@]}"
    exit 0
    ;;

  *)
    echo "mock brew: unknown command '$cmd'" >&2
    exit 1
    ;;
esac