diff --git a/.gitignore b/.gitignore
index c06902b..84287ed 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,6 @@ log/
 prezto/
 tmux/t-theme/
 .directory
+scripts/server_bin/adb
+scripts/server_bin/Archipelago_0.4.2_linux-x86_64.AppImage
+scripts/server_bin/nvim
diff --git a/scripts/server_bin/betterdiscordctl b/scripts/server_bin/betterdiscordctl
new file mode 100755
index 0000000..bed7c1c
--- /dev/null
+++ b/scripts/server_bin/betterdiscordctl
@@ -0,0 +1,670 @@
+#!/usr/bin/env bash
+
+set -ueo pipefail
+shopt -s dotglob extglob nullglob
+
+# Constants
+VERSION=2.0.1
+SOURCE=$(readlink -f "${BASH_SOURCE[0]}")
+DISABLE_SELF_UPGRADE=
+
+# Options
+cmd=
+verbosity=0
+d_flavors=('' canary ptb development)
+d_modules=
+bd_remote=github
+bd_remote_dir=
+bd_remote_url=
+bd_remote_github_owner=BetterDiscord
+bd_remote_github_repo=BetterDiscord
+bd_remote_github_release=latest
+bd_remote_asar=betterdiscord.asar
+d_install=traditional
+flatpak_bin=flatpak
+snap_bin=snap
+self_upgrade_url='https://github.com/bb010g/betterdiscordctl/raw/master/betterdiscordctl'
+
+# Variables
+d_flavor=
+d_core=
+xdg_config=
+bdc_data=${XDG_DATA_HOME:-$HOME/.local/share}/betterdiscordctl
+d_config=
+bd_config=
+bd_asar=
+bd_asar_escaped=
+bd_asar_name=
+
+show_help() {
+  cat << EOF
+Usage: ${0##*/} [-f d_flavors] \\
+  [-D <bd_r_dir>|-U <bd_r_url>|-H <bd_r_github>] \\
+  [-i (traditional|flatpak|snap)] <command>
+
+Manage BetterDiscord installations on Linux.
+
+Options:
+  -V, --version                 display version info and exit
+  -h, --help                    display this help message and exit
+  -v, --verbose                 increase verbosity
+  -q, --quiet                   decrease verbosity
+  -f, --d-flavors <d_flavors>   discover Discord installations with the
+                                colon-separated list of suffixes <d_flavors>.
+                                Defaults to ':canary:ptb:development'. Flavors
+                                must be lowercase. Stable is flavor '', as
+                                it's unsuffixed. Flavors shouldn't include
+                                spaces.
+  -m, --d-modules <d_modules>   use Discord modules in directory <d_modules>.
+                                Defaults to discovery. Discord's user-specific
+                                storage directory should contain <d_modules>.
+  -D, --bd-remote-dir           reference BetterDiscord files at directory
+    <bd_r_dir>                  <bd_r_dir>. Overrides earlier --bd-remote-url
+                                or --bd-remote-github. An empty string keeps a
+                                previous value.
+  -U, --bd-remote-url           download BetterDiscord files at base URL
+    <bd_r_url>                  <bd_r_url>. Overrides earlier --bd-remote-dir
+                                or --bd-remote-github. An empty string keeps a
+                                previous value. Works like --bd-remote-dir
+                                with files downloaded into BetterDiscord's
+                                data directory.
+  -H, --bd-remote-github        download BetterDiscord files at GitHub
+    <bd_r_github>               repository release <bd_r_github>, of form
+                                [~<owner>][/<repo>][#<release>]. Defaults to
+                                '~BetterDiscord/BetterDiscord#latest'. Overrides
+                                earlier --bd-remote-dir or --bd-remote-github.
+                                An omitted part keeps a previous value.
+                                <owner> and <repo> must not contain '~', '/',
+                                or '#'. Works like --bd-remote-url with a
+                                GitHub repository release download base URL.
+  --bd-remote-asar <bd_r_asar>  finds "betterdiscord.asar" at path <bd_r_asar>
+                                relative to remote. Defaults to
+                                'betterdiscord.asar'.
+  -i, --d-install traditional   use a traditional Discord install. Default.
+  -i, --d-install flatpak       use a Discord Flatpak app
+  -i, --d-install snap          use a Discord Snap app
+  --flatpak-bin <flatpak>       invoke Flatpak executable <flatpak>. Defaults
+                                to 'flatpak'.
+  --snap-bin <snap>             invoke Snap executable <snap>. Defaults to
+                                'snap'.
+  --self-upgrade-url            query <self_upgrade_url> for self-upgrades
+    <self_upgrade_url>
+
+Commands:
+  status                        show the current Discord patch state
+  install                       install BetterDiscord
+  reinstall                     reinstall BetterDiscord
+  uninstall                     uninstall BetterDiscord
+  self-upgrade                  upgrade this program
+EOF
+}
+
+verbose() {
+  if (( verbosity >= $1 )); then
+    shift
+    >&2 printf '%s\n' "$1"
+  fi
+}
+
+die() {
+  while (( $# > 0 )); do
+    >&2 printf '%s\n' "$1"
+    shift
+  done
+  exit 1
+}
+
+die_with_help() {
+  die "$@" "Use \`${0##*/} --help\` for more information."
+}
+
+die_option() {
+  die_with_help "ERROR: \"$1\" requires an option argument."
+}
+
+die_non_empty_option() {
+  die_with_help "ERROR: \"$1\" requires a non-empty option argument."
+}
+
+die_non_empty_option_part() {
+  die_with_help "ERROR: \"$1\" requires a non-empty $2 option argument part."
+}
+
+# arg parsing: top-level: options
+while :; do
+  if [[ -z ${1+x} ]]; then break; fi
+  case $1 in
+    -V|--version)
+      >&2 printf 'betterdiscordctl %s\n' "$VERSION"
+      exit
+      ;;
+    -h|-\?|--help)
+      show_help; exit
+      ;;
+    -v|--verbose)
+      ((verbosity++)) || :
+      ;;
+    -q|--quiet)
+      ((verbosity--)) || :
+      ;;
+    -f|--d-flavors)
+      if [[ ${2+x} ]]; then
+        if [[ $2 != "${2,,}" ]]; then
+          die_with_help "ERROR: Discord flavors list must be lowercase: $2"
+        else
+          IFS=':' read -ra d_flavors <<< "$2:"; shift
+        fi
+      else die_option "$1"; fi
+      ;;
+    -m|--d-modules)
+      if [[ ${2:+x} ]]; then d_modules=$2; shift
+      else die_non_empty_option "$1"; fi
+      ;;
+    -D|--bd-remote-dir)
+      bd_remote=dir
+      if [[ ${2+x} ]]; then [[ ${2:+x} ]] && bd_remote_dir=$2; shift
+      else die_option "$1"; fi
+      ;;
+    -U|--bd-remote-url)
+      bd_remote=url
+      if [[ ${2+x} ]]; then [[ ${2:+x} ]] && bd_remote_url=$2; shift
+      else die_option "$1"; fi
+      ;;
+    -H|--bd-remote-github)
+      bd_remote=github
+      if [[ ${2+x} ]]; then
+        if [[ ! $2 =~ (~?[^~/#]*)(/?[^~/#]*)(#?.*) ]]; then
+          die_with_help "ERROR: \"$1\" requires a valid option argument."
+        fi
+        if [[ ${BASH_REMATCH[1]} ]]; then
+          [[ ${BASH_REMATCH[2]} != '~' ]] || die_non_empty_option_part "$1" '<owner>'
+          bd_remote_github_owner=${BASH_REMATCH[1]:1}
+        fi
+        if [[ ${BASH_REMATCH[2]} ]]; then
+          [[ ${BASH_REMATCH[2]} != '/' ]] || die_non_empty_option_part "$1" '<repo>'
+          bd_remote_github_repo=${BASH_REMATCH[2]:1}
+        fi
+        if [[ ${BASH_REMATCH[3]} ]]; then
+          [[ ${BASH_REMATCH[3]} != '#' ]] || die_non_empty_option_part "$1" '<release>'
+          bd_remote_github_release=${BASH_REMATCH[3]:1}
+        fi
+        shift
+      else die_option "$1"; fi
+      ;;
+    --bd-remote-asar)
+      if [[ ${2:+x} ]]; then bd_remote_asar=$2; shift
+      else die_non_empty_option "$1"; fi
+      ;;
+    -i|--d-install)
+      if [[ ${2:+x} ]]; then case "$2" in
+        traditional|flatpak|snap) d_install=$2 ;;
+        *) die_with_help "ERROR: Unknown top-level $1 value: $2" ;;
+      esac; shift; else die_non_empty_option "$1"; fi
+      ;;
+    --flatpak-bin)
+      if [[ ${2:+x} ]]; then flatpak_bin=$2; shift
+      else die_non_empty_option "$1"; fi
+      ;;
+    --snap-bin)
+      if [[ ${2:+x} ]]; then snap_bin=$2; shift
+      else die_non_empty_option "$1"; fi
+      ;;
+    --self-upgrade-url)
+      if [[ ${2:+x} ]]; then self_upgrade_url=$2; shift
+      else die_non_empty_option "$1"; fi
+      ;;
+    # footer
+    -*=*) die "ERROR: Keyed options must not be separated by equals: $1" ;;
+    --) shift; break ;;
+    -?|--*) die_with_help "ERROR: Unknown top-level option: $1" ;;
+    -??*) die "ERROR: Switches must not be ran together: $1" ;;
+    *) break
+  esac
+  shift
+done
+# arg parsing: top-level: arguments
+while :; do
+  if [[ -z ${1+x} ]]; then break; fi
+  case "$1" in
+    status|install|reinstall|uninstall|self-upgrade)
+      cmd=$1
+      shift
+      break
+      ;;
+    *) die_with_help "ERROR: Unknown top-level argument: $1"
+  esac
+  shift
+done
+# arg parsing: top-level: validation
+case "$bd_remote" in
+  github)
+    [[ $bd_remote_github_owner ]] || die_non_empty_option_part '--bd-remote-github' '<owner>'
+    [[ $bd_remote_github_repo ]] || die_non_empty_option_part '--bd-remote-github' '<repo>'
+    [[ $bd_remote_github_release ]] || die_non_empty_option_part '--bd-remote-github' '<release>'
+    ;;
+  url)
+    [[ $bd_remote_url ]] || die_non_empty_option '--bd-remote-url'
+    ;;
+  dir)
+    [[ $bd_remote_dir ]] || die_non_empty_option '--bd-remote-dir'
+    ;;
+esac
+# arg parsing: top-level: command dispatch
+case "$cmd" in
+  status|install|reinstall|uninstall|self-upgrade)
+    # arg parsing: (status|install|reinstall|uninstall|self-upgrade): options
+    while :; do
+      if [[ -z ${1+x} ]]; then break; fi
+        case "$1" in
+          # footer
+          -*=*) die "ERROR: Keyed options must not be separated by equals: $1" ;;
+          --) shift; break ;;
+          -?|--*) die_with_help "ERROR: Unknown |$cmd| option: $1" ;;
+          -??*) die "ERROR: Switches must not be ran together: $1" ;;
+        esac
+      shift
+    done
+    # arg parsing: (status|install|reinstall|uninstall|self-upgrade): arguments
+    if [[ -n ${1+x} ]]; then
+      die_with_help "ERROR: Unknown |$cmd| argument: $1"
+    fi
+    ;;
+  '')
+    die_with_help "ERROR: Specify a non-empty command."
+    ;;
+  *) die "ERROR: [arg parsing: top-level: command dispatch] Unknown command: $cmd" ;;
+esac
+
+# currently unused
+# mkdir -p "$bdc_data"
+
+# Commands
+
+bdc_status() {
+  declare asar_install bd_remote_status index_mod
+  asar_install=no
+  index_mod=no
+  verbose 2 "VV: BetterDiscord asar installation: $bd_asar"
+  if [[ -h $bd_asar && ! -f $bd_asar ]]; then
+    asar_install='(broken link) no'
+  elif [[ -f $bd_asar ]]; then
+    asar_install='(symbolic link) yes'
+  elif [[ -d $bd_config ]]; then
+    asar_install='(missing) no'
+  fi
+  if grep -Fq "$bd_asar_escaped" "$d_core/index.js"; then
+    index_mod=yes
+  elif grep -Fq "$bd_asar_name" "$d_core/index.js"; then
+    index_mod=noncompliant
+  elif grep -Fq 'betterdiscord.asar' "$d_core/index.js"; then
+    index_mod=noncompliant
+  fi
+
+  bd_remote_status="$bd_remote"
+  case "$bd_remote" in
+    github)
+      bd_remote_status+="
+BetterDiscord remote GitHub: ~$bd_remote_github_owner/$bd_remote_github_repo#$bd_remote_github_release"
+      ;;
+    url)
+      bd_remote_status+="
+BetterDiscord remote URL: $bd_remote_url"
+      ;;
+    dir)
+      bd_remote_status+="
+BetterDiscord remote directory: $bd_remote_dir"
+      ;;
+  esac
+
+  printf 'Discord install: %s
+Discord flavor: %s
+Discord modules: %s
+BetterDiscord directory: %s
+BetterDiscord asar installed: %s
+Discord "index.js" injected: %s
+BetterDiscord remote: %s
+' "$d_install" "$d_flavor" "$d_modules" "$bd_config" "$asar_install" \
+    "$index_mod" "$bd_remote_status"
+}
+
+bdc_install() {
+  grep -Fq "$bd_asar_escaped" "$d_core/index.js" && die 'ERROR: Already installed.'
+  bdc_clean_legacy
+
+  bd_remote_install
+  bd_install
+
+  >&2 printf 'Installed. (Restart Discord if necessary.)\n'
+}
+
+bdc_reinstall() {
+  grep -Fq "$bd_asar_name" "$d_core/index.js" || die 'ERROR: Not installed.'
+  bdc_clean_legacy
+
+  bdc_kill
+
+  bd_remote_install
+  bd_install
+
+  >&2 printf 'Reinstalled.\n'
+}
+
+bdc_uninstall() {
+  grep -Fq "$bd_asar_name" "$d_core/index.js" || die 'ERROR: Not installed.'
+  bdc_clean_legacy
+
+  bdc_kill
+  bd_uninstall
+
+  >&2 printf 'Uninstalled.\n'
+}
+
+bdc_self_upgrade() {
+  if [[ $DISABLE_SELF_UPGRADE ]]; then
+    die 'ERROR: Self-upgrading has been disabled.' \
+        'If you installed this from a package, its maintainer should keep it up to date.'
+  fi
+
+  declare self_upgrade_version semver_diff
+  self_upgrade_version=$(curl -NLSs "$self_upgrade_url" | sed -n 's/^VERSION=//p')
+  if [[ ${PIPESTATUS[0]} -ne 0 ]]; then
+    die "ERROR: The remote script URL couldn't be reached to check the version."
+  fi
+  verbose 2 "VV: Local script location: $SOURCE"
+  verbose 2 "VV: Remote script URL: $self_upgrade_url"
+  verbose 1 "V: Local version: $VERSION"
+  verbose 1 "V: Remote version: $self_upgrade_version"
+  semver_diff=$(Semver::compare "$self_upgrade_version" "$VERSION")
+  if [[ $semver_diff -eq 1 ]]; then
+    >&2 printf 'Downloading betterdiscordctl...\n'
+    if curl -LSso "$SOURCE" "$self_upgrade_url"; then
+      >&2 printf 'Successfully self-upgraded betterdiscordctl.\n'
+    else
+      die 'ERROR: Failed to self-upgrade betterdiscordctl.' \
+          "You may want to rerun this command with \`sudo\`."
+    fi
+  else
+    if [[ $semver_diff -eq 0 ]]; then
+      >&2 printf 'betterdiscordctl is already the latest version (%s).\n' \
+          "$VERSION"
+    else
+      >&2 printf 'Local version (%s) is higher than remote version (%s).\n' \
+          "$VERSION" "$self_upgrade_version"
+    fi
+  fi
+}
+
+# Implementation functions
+
+bdc_main() {
+  xdg_discover_config
+  bdc_discover
+  d_core=$d_modules/discord_desktop_core
+  [[ -d $d_core ]] || die "ERROR: Directory 'discord_desktop_core' not found in: $d_modules"
+  bd_remote_init
+  bd_asar=$bd_config/data/$bd_asar_name
+  bd_asar_escaped=${bd_asar/\\/\\\\}
+}
+
+xdg_discover_config() {
+  case "$d_install" in
+    traditional)
+      xdg_config=${XDG_CONFIG_HOME:-$HOME/.config}
+      ;;
+    snap)
+      # shellcheck disable=SC2016
+      # Expansion should happen inside snap's shell.
+      xdg_config=$("$snap_bin" run --shell discord \
+          <<< $'printf -- \'%s/.config\n\' "$SNAP_USER_DATA" 1>&3' 3>&1)
+      ;;
+    flatpak)
+      # shellcheck disable=SC2016
+      # Expansion should happen inside flatpak's shell.
+      xdg_config=$("$flatpak_bin" run --command=sh com.discordapp.Discord \
+          -c $'printf -- \'%s\n\' "$XDG_CONFIG_HOME"')
+      xdg_config=${xdg_config:-$HOME/.var/app/com.discordapp.Discord/config}
+      ;;
+    *) die "ERROR: [xdg_discover_config] Unknown Discord install variant: $d_install" ;;
+  esac
+  [[ $xdg_config ]] || >&2 printf "WARN: XDG user config directory (\$XDG_CONFIG_HOME) not found.\n"
+}
+
+bdc_discover() {
+  d_discover_config
+  bd_discover_config
+  bdc_find_modules
+}
+
+bdc_find_modules() {
+  if [[ $d_modules ]]; then
+    [[ -d $d_modules ]] || die "ERROR: Discord modules directory not found: $d_modules"
+    d_flavor=${d_modules%/*/modules}
+    d_flavor=${d_flavor##*/discord}
+  else
+    [[ -d $d_config ]] || die "ERROR: Discord $d_flavor config directory not found: $d_config"
+    declare -a all_d_modules
+    all_d_modules=("$d_config/"+([0-9]).+([0-9]).+([0-9])/modules)
+    ((${#all_d_modules[@]})) || die 'ERROR: Discord modules directory not found.' \
+        'Try specifying it with --d-modules.'
+    d_modules=${all_d_modules[-1]}
+    verbose 1 "V: Found modules in $d_modules"
+  fi
+}
+
+bdc_kill() {
+  >&2 printf 'Killing Discord %s processes...\n' "$d_flavor"
+  pkill -exi -KILL "discord${d_flavor:0:8}" || >&2 printf 'No active processes found.\n'
+}
+
+d_discover_config() {
+  [[ $xdg_config ]] || die "ERROR: XDG user config directory (\$XDG_CONFIG_HOME) not found."
+  case "$d_install" in
+    traditional)
+      for d_flavor in "${d_flavors[@]}"; do
+        verbose 2 "VV: Trying flavor '$d_flavor'"
+        d_config=$xdg_config/discord${d_flavor,,}
+        if [[ -d $d_config ]]; then
+          break
+        fi
+        >&2 printf 'WARN: Discord %s config directory not found (%s).\n' \
+            "$d_flavor" "$d_config"
+      done
+      ;;
+    snap|flatpak)
+      d_config=$xdg_config/discord
+      if [[ ! -d $d_config ]]; then
+        >&2 printf 'WARN: Discord %s config directory not found (%s).\n' \
+            "$d_install" "$d_config"
+      fi
+      ;;
+    *) die "ERROR: [d_discover_config] Unknown Discord install variant: $d_install" ;;
+  esac
+}
+
+bd_discover_config() {
+  [[ $xdg_config ]] || die "ERROR: XDG user config directory (\$XDG_CONFIG_HOME) not found."
+  case "$d_install" in
+    traditional|snap|flatpak)
+      bd_config=$xdg_config/BetterDiscord
+      ;;
+    *) die "ERROR: [bd_discover_config] Unknown Discord install variant: $d_install" ;;
+  esac
+}
+
+# TODO: Integrate $bd_remote into main & install
+
+bd_remote_init() {
+  case "$bd_remote" in
+    github) bd_remote_init_github ;;
+    url) bd_remote_init_url ;;
+    dir) bd_remote_init_dir ;;
+    *) die "ERROR: [bd remote init] Unknown remote type: $bd_remote" ;;
+  esac
+  verbose 2 "VV: BetterDiscord remote asar path: $bd_remote_asar"
+  bd_asar_name=${bd_remote_asar##*/}
+}
+bd_remote_init_github() {
+  bd_remote_url=https://github.com/$bd_remote_github_owner/$bd_remote_github_repo/releases/$bd_remote_github_release/download
+  verbose 2 "VV: BetterDiscord remote GitHub repository owner: $bd_remote_github_owner"
+  verbose 2 "VV: BetterDiscord remote GitHub repository name: $bd_remote_github_repo"
+  verbose 2 "VV: BetterDiscord remote GitHub repository release: $bd_remote_github_release"
+  bd_remote_init_url
+}
+bd_remote_init_url() {
+  bd_remote_dir=$bd_config/data
+  verbose 2 "VV: BetterDiscord remote URL: $bd_remote_url"
+  bd_remote_init_dir
+}
+bd_remote_init_dir() {
+  verbose 2 "VV: BetterDiscord remote directory: $bd_remote_dir"
+}
+
+bd_remote_install() {
+  case "$bd_remote" in
+    github) bd_remote_install_github ;;
+    url) bd_remote_install_url ;;
+    dir) bd_remote_install_dir ;;
+    *) die "ERROR: [bd remote install] Unknown remote type: $bd_remote" ;;
+  esac
+}
+bd_remote_install_github() {
+  verbose 2 "VV: Installing remote BetterDiscord (GitHub)..."
+  bd_remote_install_url
+}
+bd_remote_install_url() {
+  verbose 2 "VV: Installing remote BetterDiscord (URL)..."
+  verbose 1 "V: Downloading BetterDiscord asar..."
+  curl -LSso "$bd_remote_dir/$bd_remote_asar" --create-dirs \
+      "$bd_remote_url/$bd_remote_asar"
+  bd_remote_install_dir
+}
+bd_remote_install_dir() {
+  verbose 2 "VV: Installing remote BetterDiscord (directory)..."
+  if [[ "$bd_remote_dir/$bd_remote_asar" != "$bd_asar" ]]; then
+    verbose 1 "V: Copying BetterDiscord asar..."
+    install -Dm 644 "$bd_remote_dir/$bd_remote_asar" "$bd_asar"
+  fi
+}
+
+bdc_clean_legacy() {
+  if [[ -d $d_core/core ]]; then
+    >&2 printf 'Removing legacy core directory...\n'
+    rm -rf "$d_core/core"
+  fi
+  if [[ -d $d_core/injector ]]; then
+    >&2 printf 'Removing legacy injector directory...\n'
+    rm -rf "$d_core/injector"
+  fi
+  if [[ -d $bdc_data ]]; then
+    if [[ -f "$bdc_data/bd_map" || -d "$bdc_data/bd" ]]; then
+      >&2 printf 'Removing legacy machine-specific data...\n'
+      rm -rf "$bdc_data/bd_map" "$bdc_data/bd"
+    fi
+  fi
+}
+
+bd_install() {
+  verbose 1 'V: Injecting into index.js...'
+  printf $'require("%s");
+module.exports = require(\'./core.asar\');
+' "$bd_asar_escaped" > "$d_core/index.js"
+}
+
+bd_uninstall() {
+  verbose 1 'V: Removing BetterDiscord injection...'
+  printf $'module.exports = require(\'./core.asar\');
+' > "$d_core/index.js"
+}
+
+# Included from https://github.com/bb010g/Semver.sh , under the MIT License.
+
+Semver::validate() {
+  [[ $1 =~ ^([^+-.]*)\.?([^+-.]*)\.?([^+-]*)(-?)([^+]*)(\+?)(.*)$ ]]
+  declare -a ver; ver=("${BASH_REMATCH[@]:1}")
+
+  if [[ ${ver[0]} != +([0-9]) ]]; then printf '%s\n' "Semver::validate: invalid major: ${ver[0]}" >&2; return 1; fi
+  if [[ ${ver[1]} != +([0-9]) ]]; then printf '%s\n' "Semver::validate: invalid minor: ${ver[1]}" >&2; return 1; fi
+  if [[ ${ver[2]} != +([0-9]) ]]; then printf '%s\n' "Semver::validate: invalid patch: ${ver[2]}" >&2; return 1; fi
+
+  if [[ ${ver[3]} == '-' && ${ver[4]} != +([0-9A-Za-z-])*(.+([0-9A-Za-z-])) ]]; then
+    printf '%s\n' "Semver::validate: invalid pre-release: ${ver[4]}" >&2; return 1
+  fi
+  if [[ ${ver[5]} == '+' && ${ver[6]} != +([0-9A-Za-z-])*(.+([0-9A-Za-z-])) ]]; then
+    printf '%s\n' "Semver::validate: invalid build metadata: ${ver[6]}" >&2; return 1
+  fi
+
+  if [[ -n $2 ]]; then
+    printf '%s\n' "$2=(${ver[0]@Q} ${ver[1]@Q} ${ver[2]@Q} ${ver[4]@Q} ${ver[6]@Q})"
+  else
+    printf '%s\n' "$1"
+  fi
+}
+
+Semver::compare() {
+  declare -a xs ys
+  eval "$(Semver::validate "$1" xs)"
+  eval "$(Semver::validate "$2" ys)"
+
+  declare i x y
+  for i in 0 1 2; do
+    x=${xs[i]}; y=${ys[i]}
+    if [[ $x -eq $y ]]; then continue; fi
+    if [[ $x -gt $y ]]; then echo 1; return; fi
+    if [[ $x -lt $y ]]; then echo -1; return; fi
+  done
+
+  x=${xs[3]}; y=${ys[3]}
+  if [[ -z $x && -n $y ]]; then echo 1; return; fi
+  if [[ -n $x && -z $y ]]; then echo -1; return; fi
+
+  declare -a x_pre; declare x_len
+  declare -a y_pre; declare y_len
+  IFS=. read -ra x_pre <<< "$x."; x_len=${#x_pre[@]}
+  IFS=. read -ra y_pre <<< "$y."; y_len=${#y_pre[@]}
+
+  if (( x_len > y_len )); then echo 1; return; fi
+  if (( x_len < y_len )); then echo -1; return; fi
+
+  for (( i=0; i < x_len; i++ )); do
+    x=${x_pre[i]}; y=${y_pre[i]}
+    if [[ $x == "$y" ]]; then continue; fi
+
+    if [[ $x == +([0-9]) ]]; then
+      if [[ $y == +([0-9]) ]]; then
+        if [[ $x -gt $y ]]; then echo 1; return; fi
+        if [[ $x -lt $y ]]; then echo -1; return; fi
+      else echo -1; return; fi
+    elif [[ $y == +([0-9]) ]]; then echo 1; return
+    else
+      if [[ $x > $y ]]; then echo 1; return; fi
+      if [[ $x < $y ]]; then echo -1; return; fi
+    fi
+  done
+
+  echo 0
+}
+
+# Run command
+
+case "$cmd" in
+  status)
+    bdc_main
+    bdc_status
+    ;;
+  install)
+    bdc_main
+    bdc_install
+    ;;
+  reinstall)
+    bdc_main
+    bdc_reinstall
+    ;;
+  uninstall)
+    bdc_main
+    bdc_uninstall
+    ;;
+  self-upgrade)
+    bdc_self_upgrade
+    ;;
+  *) die "ERROR: Unknown command (in command dispatch): $cmd" ;;
+esac