fox

#!/usr/bin/env bash
#
# Fox: Android reverse-engineering toolkit.

set -euo pipefail

FOX_VERSION="1.0.0"
SELF_PATH="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd -P)"
CMDS_PATH="${SELF_PATH}/cmds"

panic() {
    printf 'fox: %s\n' "$*" >&2
    exit 1
}

install() {
    "${SELF_PATH}/extras/install" "$@"
}

version() {
    printf 'fox version %s\n' "${FOX_VERSION}"
}

help() {
    [[ -d "${CMDS_PATH}" ]] || panic "commands directory is missing"

    cat <<'EOF'
usage: fox <command> [args]

Core commands:
  version                 Show Fox version.
  install [directory]     Install/symlink bundled tools (default: ~/.local/bin).
  doctor                  Validate the local toolchain and print versions.
  help                    Show this help.

Android analysis commands:
  decrom                  Decompile APK/JAR/DEX and ART OAT/ODEX images.
  dump                    Regenerate Android framework-constant maps from SDK sources.
  fixsrc                  Improve selected literals in JADX Java output.
  replace                 Overlay source/resource trees by basename.
  xmlcp                   Copy matching XML entries into companion XML files.
  update                  Fast-forward Fox from its Git remote (legacy command).
EOF

    local command
    while IFS= read -r command; do
        printf '  %s\n' "$(basename "${command}")"
    done < <(find "${CMDS_PATH}" -maxdepth 1 -type f -perm -u+x -print | sort)
}

doctor() {
    "${SELF_PATH}/cmds/doctor"
}

execute() {
    local action="${1:-}"
    [[ -n "${action}" ]] || {
        help
        return 1
    }

    local command="${CMDS_PATH}/${action}"
    [[ -f "${command}" && -x "${command}" ]] || panic "'${action}' is not a fox command. See 'fox help'."
    shift
    exec "${command}" "$@"
}

action="${1:-}"
if [[ $# -gt 0 ]]; then
    shift
fi

case "${action}" in
    version|-V|--version)
        version
        ;;
    help|-h|--help)
        help
        ;;
    install)
        install "$@"
        ;;
    doctor)
        doctor
        ;;
    "")
        help
        ;;
    *)
        execute "${action}" "$@"
        ;;
esac