#!/bin/bash
set -u

# First check if the OS is Linux.
if [[ "$(uname)" = "Linux" ]]; then
  HOMEBREW_ON_LINUX=1
fi

# On macOS, this script installs to /usr/local only.
# On Linux, it installs to /home/linuxbrew/.linuxbrew if you have sudo access
# and ~/.linuxbrew otherwise.
# To install elsewhere (which is unsupported)
# you can untar https://github.com/Homebrew/brew/tarball/master
# anywhere you like.
if [[ -z "${HOMEBREW_ON_LINUX-}" ]]; then
  HOMEBREW_PREFIX="/usr/local"
  HOMEBREW_REPOSITORY="/usr/local/Homebrew"
  HOMEBREW_CACHE="${HOME}/Library/Caches/Homebrew"

  STAT="stat -f"
  CHOWN="/usr/sbin/chown"
  CHGRP="/usr/bin/chgrp"
  GROUP="admin"
  TOUCH="/usr/bin/touch"
else
  HOMEBREW_PREFIX_DEFAULT="/home/linuxbrew/.linuxbrew"
  HOMEBREW_CACHE="${HOME}/.cache/Homebrew"

  STAT="stat --printf"
  CHOWN="/bin/chown"
  CHGRP="/bin/chgrp"
  GROUP="$(id -gn)"
  TOUCH="/bin/touch"
fi
BREW_REPO="https://github.com/Homebrew/brew"

# TODO: bump version when new macOS is released
MACOS_LATEST_SUPPORTED="10.15"
# TODO: bump version when new macOS is released
MACOS_OLDEST_SUPPORTED="10.13"

# no analytics during installation
export HOMEBREW_NO_ANALYTICS_THIS_RUN=1
export HOMEBREW_NO_ANALYTICS_MESSAGE_OUTPUT=1

# string formatters
if [[ -t 1 ]]; then
  tty_escape() { printf "\033[%sm" "$1"; }
else
  tty_escape() { :; }
fi
tty_mkbold() { tty_escape "1;$1"; }
tty_underline="$(tty_escape "4;39")"
tty_blue="$(tty_mkbold 34)"
tty_red="$(tty_mkbold 31)"
tty_bold="$(tty_mkbold 39)"
tty_reset="$(tty_escape 0)"

have_sudo_access() {
  if [[ -z "${HAVE_SUDO_ACCESS-}" ]]; then
    /usr/bin/sudo -l mkdir &>/dev/null
    HAVE_SUDO_ACCESS="$?"
  fi

  if [[ -z "${HOMEBREW_ON_LINUX-}" ]] && [[ "$HAVE_SUDO_ACCESS" -ne 0 ]]; then
    abort "Need sudo access on macOS!"
  fi

  return "$HAVE_SUDO_ACCESS"
}

shell_join() {
  local arg
  printf "%s" "$1"
  shift
  for arg in "$@"; do
    printf " "
    printf "%s" "${arg// /\ }"
  done
}

chomp() {
  printf "%s" "${1/"$'\n'"/}"
}

ohai() {
  printf "${tty_blue}==>${tty_bold} %s${tty_reset}\n" "$(shell_join "$@")"
}

warn() {
  printf "${tty_red}Warning${tty_reset}: %s\n" "$(chomp "$1")"
}

abort() {
  printf "%s\n" "$1"
  exit 1
}

execute() {
  if ! "$@"; then
    abort "$(printf "Failed during: %s" "$(shell_join "$@")")"
  fi
}

execute_sudo() {
  local -a args=("$@")
  if [[ -n "${SUDO_ASKPASS-}" ]]; then
    args=("-A" "${args[@]}")
  fi
  if have_sudo_access; then
    ohai "/usr/bin/sudo" "${args[@]}"
    execute "/usr/bin/sudo" "${args[@]}"
  else
    ohai "${args[@]}"
    execute "${args[@]}"
  fi
}

getc() {
  local save_state
  save_state=$(/bin/stty -g)
  /bin/stty raw -echo
  IFS= read -r -n 1 -d '' "$@"
  /bin/stty "$save_state"
}

wait_for_user() {
  local c
  echo
  echo "Press RETURN to continue or any other key to abort"
  getc c
  # we test for \r and \n because some stuff does \r instead
  if ! [[ "$c" == $'\r' || "$c" == $'\n' ]]; then
    exit 1
  fi
}

major_minor() {
  echo "${1%%.*}.$(x="${1#*.}"; echo "${x%%.*}")"
}

if [[ -z "${HOMEBREW_ON_LINUX-}" ]]; then
  macos_version="$(major_minor "$(/usr/bin/sw_vers -productVersion)")"
fi

version_gt() {
  [[ "${1%.*}" -gt "${2%.*}" ]] || [[ "${1%.*}" -eq "${2%.*}" && "${1#*.}" -gt "${2#*.}" ]]
}
version_ge() {
  [[ "${1%.*}" -gt "${2%.*}" ]] || [[ "${1%.*}" -eq "${2%.*}" && "${1#*.}" -ge "${2#*.}" ]]
}
version_lt() {
  [[ "${1%.*}" -lt "${2%.*}" ]] || [[ "${1%.*}" -eq "${2%.*}" && "${1#*.}" -lt "${2#*.}" ]]
}

should_install_git() {
  if [[ $(command -v git) ]]; then
    return 1
  fi
}

should_install_command_line_tools() {
  if [[ -n "${HOMEBREW_ON_LINUX-}" ]]; then
    return 1
  fi

  if version_gt "$macos_version" "10.13"; then
    ! [[ -e "/Library/Developer/CommandLineTools/usr/bin/git" ]]
  else
    ! [[ -e "/Library/Developer/CommandLineTools/usr/bin/git" ]] ||
      ! [[ -e "/usr/include/iconv.h" ]]
  fi
}

get_permission() {
  $STAT "%A" "$1"
}

user_only_chmod() {
  [[ -d "$1" ]] && [[ "$(get_permission "$1")" != "755" ]]
}

exists_but_not_writable() {
  [[ -e "$1" ]] && ! [[ -r "$1" && -w "$1" && -x "$1" ]]
}

get_owner() {
  $STAT "%u" "$1"
}

file_not_owned() {
  [[ "$(get_owner "$1")" != "$(id -u)" ]]
}

get_group() {
  $STAT "%g" "$1"
}

file_not_grpowned() {
  [[ " $(id -G "$USER") " != *" $(get_group "$1") "*  ]]
}

# USER isn't always set so provide a fall back for the installer and subprocesses.
if [[ -z "${USER-}" ]]; then
  USER="$(chomp "$(id -un)")"
  export USER
fi

# Invalidate sudo timestamp before exiting (if it wasn't active before).
if ! /usr/bin/sudo -n -v 2>/dev/null; then
  trap '/usr/bin/sudo -k' EXIT
fi

# Things can fail later if `pwd` doesn't exist.
# Also sudo prints a warning message for no good reason
cd "/usr" || exit 1

####################################################################### script
if should_install_git; then
    abort "$(cat <<EOABORT
You must install Git before installing Homebrew. See:
  ${tty_underline}https://docs.brew.sh/Installation${tty_reset}
EOABORT
)"
fi

if [[ -n "${HOMEBREW_ON_LINUX-}" ]]; then
  if [[ -n "${CI-}" ]] || [[ -w "$HOMEBREW_PREFIX_DEFAULT" ]] || [[ -w "/home/linuxbrew" ]] || [[ -w "/home" ]]; then
    HOMEBREW_PREFIX="$HOMEBREW_PREFIX_DEFAULT"
  else
    trap exit SIGINT
    sudo_output="$(/usr/bin/sudo -n -l mkdir 2>&1)"
    sudo_exit_code="$?"
    if [[ "$sudo_exit_code" -ne 0 ]] && [[ "$sudo_output" = "sudo: a password is required" ]]; then
      ohai "Select the Homebrew installation directory"
      echo "- ${tty_bold}Enter your password${tty_reset} to install to ${tty_underline}${HOMEBREW_PREFIX_DEFAULT}${tty_reset} (${tty_bold}recommended${tty_reset})"
      echo "- ${tty_bold}Press Control-D${tty_reset} to install to ${tty_underline}$HOME/.linuxbrew${tty_reset}"
      echo "- ${tty_bold}Press Control-C${tty_reset} to cancel installation"
    fi
    if have_sudo_access; then
      HOMEBREW_PREFIX="$HOMEBREW_PREFIX_DEFAULT"
    else
      HOMEBREW_PREFIX="$HOME/.linuxbrew"
    fi
    trap - SIGINT
  fi
  HOMEBREW_REPOSITORY="${HOMEBREW_PREFIX}/Homebrew"
fi

if [[ "$UID" == "0" ]]; then
  abort "Don't run this as root!"
elif [[ -d "$HOMEBREW_PREFIX" && ! -x "$HOMEBREW_PREFIX" ]]; then
  abort "$(cat <<EOABORT
The Homebrew prefix, ${HOMEBREW_PREFIX}, exists but is not searchable. If this is
not intentional, please restore the default permissions and try running the
installer again:
    sudo chmod 775 ${HOMEBREW_PREFIX}
EOABORT
)"
fi

if [[ -z "${HOMEBREW_ON_LINUX-}" ]]; then
  if version_lt "$macos_version" "10.7"; then
    abort "$(cat <<EOABORT
Your Mac OS X version is too old. See:
  ${tty_underline}https://github.com/mistydemeo/tigerbrew${tty_reset}
EOABORT
)"
  elif version_lt "$macos_version" "10.9"; then
    abort "Your OS X version is too old"
  elif ! [[ "$(dsmemberutil checkmembership -U "$USER" -G "$GROUP")" = *"user is a member"* ]]; then
    abort "This script requires the user $USER to be an Administrator."
  elif version_gt "$macos_version" "$MACOS_LATEST_SUPPORTED" || \
    version_lt "$macos_version" "$MACOS_OLDEST_SUPPORTED"; then
    who="We"
    what=""
    if version_gt "$macos_version" "$MACOS_LATEST_SUPPORTED"; then
      what="pre-release version"
    else
      who+=" (and Apple)"
      what="old version"
    fi
    ohai "You are using macOS ${macos_version}."
    ohai "${who} do not provide support for this ${what}."

    echo "$(cat <<EOS
This installation may not succeed.
After installation, you will encounter build failures with some formulae.
Please create pull requests instead of asking for help on Homebrew\'s GitHub,
Discourse, Twitter or IRC. You are responsible for resolving any issues you
experience while you are running this ${what}.
EOS
)
"
  fi
fi

ohai "This script will install:"
echo "${HOMEBREW_PREFIX}/bin/brew"
echo "${HOMEBREW_PREFIX}/share/doc/homebrew"
echo "${HOMEBREW_PREFIX}/share/man/man1/brew.1"
echo "${HOMEBREW_PREFIX}/share/zsh/site-functions/_brew"
echo "${HOMEBREW_PREFIX}/etc/bash_completion.d/brew"
echo "${HOMEBREW_REPOSITORY}"

# Keep relatively in sync with
# https://github.com/Homebrew/brew/blob/master/Library/Homebrew/keg.rb
directories=(bin etc include lib sbin share opt var
             Frameworks
             etc/bash_completion.d lib/pkgconfig
             share/aclocal share/doc share/info share/locale share/man
             share/man/man1 share/man/man2 share/man/man3 share/man/man4
             share/man/man5 share/man/man6 share/man/man7 share/man/man8
             var/log var/homebrew var/homebrew/linked
             bin/brew)
group_chmods=()
for dir in "${directories[@]}"; do
  if exists_but_not_writable "${HOMEBREW_PREFIX}/${dir}"; then
    group_chmods+=("${HOMEBREW_PREFIX}/${dir}")
  fi
done

# zsh refuses to read from these directories if group writable
directories=(share/zsh share/zsh/site-functions)
zsh_dirs=()
for dir in "${directories[@]}"; do
  zsh_dirs+=("${HOMEBREW_PREFIX}/${dir}")
done

directories=(bin etc include lib sbin share var opt
             share/zsh share/zsh/site-functions
             var/homebrew var/homebrew/linked
             Cellar Caskroom Homebrew Frameworks)
mkdirs=()
for dir in "${directories[@]}"; do
  if ! [[ -d "${HOMEBREW_PREFIX}/${dir}" ]]; then
    mkdirs+=("${HOMEBREW_PREFIX}/${dir}")
  fi
done

user_chmods=()
if [[ "${#zsh_dirs[@]}" -gt 0 ]]; then
  for dir in "${zsh_dirs[@]}"; do
    if user_only_chmod "${dir}"; then
      user_chmods+=("${dir}")
    fi
  done
fi

chmods=()
if [[ "${#group_chmods[@]}" -gt 0 ]]; then
  chmods+=("${group_chmods[@]}")
fi
if [[ "${#user_chmods[@]}" -gt 0 ]]; then
  chmods+=("${user_chmods[@]}")
fi

chowns=()
chgrps=()
if [[ "${#chmods[@]}" -gt 0 ]]; then
  for dir in "${chmods[@]}"; do
    if file_not_owned "${dir}"; then
      chowns+=("${dir}")
    fi
    if file_not_grpowned "${dir}"; then
      chgrps+=("${dir}")
    fi
  done
fi

if [[ "${#group_chmods[@]}" -gt 0 ]]; then
  ohai "The following existing directories will be made group writable:"
  printf "%s\n" "${group_chmods[@]}"
fi
if [[ "${#user_chmods[@]}" -gt 0 ]]; then
  ohai "The following existing directories will be made writable by user only:"
  printf "%s\n" "${user_chmods[@]}"
fi
if [[ "${#chowns[@]}" -gt 0 ]]; then
  ohai "The following existing directories will have their owner set to ${tty_underline}${USER}${tty_reset}:"
  printf "%s\n" "${chowns[@]}"
fi
if [[ "${#chgrps[@]}" -gt 0 ]]; then
  ohai "The following existing directories will have their group set to ${tty_underline}${GROUP}${tty_reset}:"
  printf "%s\n" "${chgrps[@]}"
fi
if [[ "${#mkdirs[@]}" -gt 0 ]]; then
  ohai "The following new directories will be created:"
  printf "%s\n" "${mkdirs[@]}"
fi

if should_install_command_line_tools; then
  ohai "The Xcode Command Line Tools will be installed."
fi

if [[ -t 0 && -z "${CI-}" ]]; then
  wait_for_user
fi

if [[ -d "${HOMEBREW_PREFIX}" ]]; then
  if [[ "${#chmods[@]}" -gt 0 ]]; then
    execute_sudo "/bin/chmod" "u+rwx" "${chmods[@]}"
  fi
  if [[ "${#group_chmods[@]}" -gt 0 ]]; then
    execute_sudo "/bin/chmod" "g+rwx" "${group_chmods[@]}"
  fi
  if [[ "${#user_chmods[@]}" -gt 0 ]]; then
    execute_sudo "/bin/chmod" "755" "${user_chmods[@]}"
  fi
  if [[ "${#chowns[@]}" -gt 0 ]]; then
    execute_sudo "$CHOWN" "$USER" "${chowns[@]}"
  fi
  if [[ "${#chgrps[@]}" -gt 0 ]]; then
    execute_sudo "$CHGRP" "$GROUP" "${chgrps[@]}"
  fi
else
  execute_sudo "/bin/mkdir" "-p" "${HOMEBREW_PREFIX}"
  if [[ -z "${HOMEBREW_ON_LINUX-}" ]]; then
    execute_sudo "$CHOWN" "root:wheel" "${HOMEBREW_PREFIX}"
  else
    execute_sudo "$CHOWN" "$USER:$GROUP" "${HOMEBREW_PREFIX}"
  fi
fi

if [[ "${#mkdirs[@]}" -gt 0 ]]; then
  execute_sudo "/bin/mkdir" "-p" "${mkdirs[@]}"
  execute_sudo "/bin/chmod" "g+rwx" "${mkdirs[@]}"
  execute_sudo "$CHOWN" "$USER" "${mkdirs[@]}"
  execute_sudo "$CHGRP" "$GROUP" "${mkdirs[@]}"
fi

if ! [[ -d "${HOMEBREW_CACHE}" ]]; then
  if [[ -z "${HOMEBREW_ON_LINUX-}" ]]; then
    execute_sudo "/bin/mkdir" "-p" "${HOMEBREW_CACHE}"
  else
    execute "/bin/mkdir" "-p" "${HOMEBREW_CACHE}"
  fi
fi
if exists_but_not_writable "${HOMEBREW_CACHE}"; then
  execute_sudo "/bin/chmod" "g+rwx" "${HOMEBREW_CACHE}"
fi
if file_not_owned "${HOMEBREW_CACHE}"; then
  execute_sudo "$CHOWN" "$USER" "${HOMEBREW_CACHE}"
fi
if file_not_grpowned "${HOMEBREW_CACHE}"; then
  execute_sudo "$CHGRP" "$GROUP" "${HOMEBREW_CACHE}"
fi
if [[ -d "${HOMEBREW_CACHE}" ]]; then
  execute "$TOUCH" "${HOMEBREW_CACHE}/.cleaned"
fi

if should_install_command_line_tools && version_ge "$macos_version" "10.13"; then
  ohai "Searching online for the Command Line Tools"
  # This temporary file prompts the 'softwareupdate' utility to list the Command Line Tools
  clt_placeholder="/tmp/.com.apple.dt.CommandLineTools.installondemand.in-progress"
  execute_sudo "$TOUCH" "$clt_placeholder"

  clt_label_command="/usr/sbin/softwareupdate -l |
                      grep -B 1 -E 'Command Line Tools' |
                      awk -F'*' '/^ *\\*/ {print \$2}' |
                      sed -e 's/^ *Label: //' -e 's/^ *//' |
                      sort -V |
                      tail -n1"
  clt_label="$(chomp "$(/bin/bash -c "$clt_label_command")")"

  if [[ -n "$clt_label" ]]; then
    ohai "Installing $clt_label"
    execute_sudo "/usr/sbin/softwareupdate" "-i" "$clt_label"
    execute_sudo "/bin/rm" "-f" "$clt_placeholder"
    execute_sudo "/usr/bin/xcode-select" "--switch" "/Library/Developer/CommandLineTools"
  fi
fi

# Headless install may have failed, so fallback to original 'xcode-select' method
if should_install_command_line_tools && test -t 0; then
  ohai "Installing the Command Line Tools (expect a GUI popup):"
  execute_sudo "/usr/bin/xcode-select" "--install"
  echo "Press any key when the installation has completed."
  getc
  execute_sudo "/usr/bin/xcode-select" "--switch" "/Library/Developer/CommandLineTools"
fi

if [[ -z "${HOMEBREW_ON_LINUX-}" ]] && ! output="$(/usr/bin/xcrun clang 2>&1)" && [[ "$output" == *"license"* ]]; then
  abort "$(cat <<EOABORT
You have not agreed to the Xcode license.
Before running the installer again please agree to the license by opening
Xcode.app or running:
    sudo xcodebuild -license
EOABORT
)"
fi

ohai "Downloading and installing Homebrew..."
(
  cd "${HOMEBREW_REPOSITORY}" >/dev/null || return

  # we do it in four steps to avoid merge errors when reinstalling
  execute "git" "init" "-q"

  # "git remote add" will fail if the remote is defined in the global config
  execute "git" "config" "remote.origin.url" "${BREW_REPO}"
  execute "git" "config" "remote.origin.fetch" "+refs/heads/*:refs/remotes/origin/*"

  # ensure we don't munge line endings on checkout
  execute "git" "config" "core.autocrlf" "false"

  execute "git" "fetch" "origin" "--force"
  execute "git" "fetch" "origin" "--tags" "--force"

  execute "git" "reset" "--hard" "origin/master"

  execute "ln" "-sf" "${HOMEBREW_REPOSITORY}/bin/brew" "${HOMEBREW_PREFIX}/bin/brew"

  execute "${HOMEBREW_PREFIX}/bin/brew" "update" "--force"
)

if [[ ":${PATH}:" != *":${HOMEBREW_PREFIX}/bin:"* ]]; then
  warn "${HOMEBREW_PREFIX}/bin is not in your PATH."
fi

ohai "Installation successful!"
echo

# Use the shell's audible bell.
if [[ -t 1 ]]; then
  printf "\a"
fi

# Use an extra newline and bold to avoid this being missed.
ohai "Homebrew has enabled anonymous aggregate formulae and cask analytics."
echo "$(cat <<EOS
${tty_bold}Read the analytics documentation (and how to opt-out) here:
  ${tty_underline}https://docs.brew.sh/Analytics${tty_reset}
No analytics data has been sent yet (or will be during this \`install\` run).
EOS
)
"

ohai "Homebrew is run entirely by unpaid volunteers. Please consider donating:"
echo "$(cat <<EOS
  ${tty_underline}https://github.com/Homebrew/brew#donations${tty_reset}
EOS
)
"

(
  cd "${HOMEBREW_REPOSITORY}" >/dev/null || return
  execute "git" "config" "--replace-all" "homebrew.analyticsmessage" "true"
  execute "git" "config" "--replace-all" "homebrew.caskanalyticsmessage" "true"
)

ohai "Next steps:"
echo "- Run \`brew help\` to get started"
echo "- Further documentation: "
echo "    ${tty_underline}https://docs.brew.sh${tty_reset}"

if [[ -n "${HOMEBREW_ON_LINUX-}" ]]; then
  case "$SHELL" in
    */bash*)
      if [[ -r "$HOME/.bash_profile" ]]; then
        shell_profile="$HOME/.bash_profile"
      else
        shell_profile="$HOME/.profile"
      fi
      ;;
    */zsh*)
      shell_profile="$HOME/.zprofile"
      ;;
    *)
      shell_profile="$HOME/.profile"
      ;;
  esac

  cat <<EOS
- Install the Homebrew dependencies if you have sudo access:
  ${tty_bold}Debian, Ubuntu, etc.${tty_reset}
    sudo apt-get install build-essential
  ${tty_bold}Fedora, Red Hat, CentOS, etc.${tty_reset}
    sudo yum groupinstall 'Development Tools'
  See ${tty_underline}https://docs.brew.sh/linux${tty_reset} for more information.
- Configure Homebrew in your ${tty_underline}${shell_profile}${tty_reset} by running
    echo 'eval \$(${HOMEBREW_PREFIX}/bin/brew shellenv)' >> ${shell_profile}
- Add Homebrew to your ${tty_bold}PATH${tty_reset}
    eval \$(${HOMEBREW_PREFIX}/bin/brew shellenv)
- We recommend that you install GCC by running:
    brew install gcc

EOS
fi

$ sh xxxx.sh

$ rbenv init
# Load rbenv automatically by appending
# the following to ~/.bash_profile:

eval "$(rbenv init -)"

$ cd
$ open .bash_profile

#!/bin/bash
# Usage: rbenv doctor
# Summary: Detects common problems in rbenv installation

set -e
[ -n "$RBENV_DEBUG" ] && set -x

indent() {
  sed 's/^/  /'
}

printc() {
  local color_name="color_$1"
  local fmt="$2"
  shift 2

  if [[ $fmt == *"\n" ]]; then
    fmt="${!color_name}${fmt%\\n}${color_reset}\n"
  else
    fmt="${!color_name}${fmt}${color_reset}"
  fi

  printf "$fmt" "$@"
}

if [ -t 1 ]; then
  color_red=$'\e[31m'
  color_green=$'\e[32m'
  color_yellow=$'\e[1;33m'
  color_bright=$'\e[1;37m'
  color_reset=$'\e[0m'
else
  color_red=""
  color_green=""
  color_yellow=""
  color_bright=""
  color_reset=""
fi

warnings=0

if [ $(uname -s) = "Darwin" ]; then
  bashrc=".bash_profile"
else
  bashrc=".bashrc"
fi

echo -n "Checking for \`rbenv' in PATH: "
num_locations="$(which -a rbenv | uniq | wc -l)"
if [ $num_locations -eq 0 ]; then
  printc red "not found\n"
  { if [ -x ~/.rbenv/bin/rbenv ]; then
      echo "You seem to have rbenv installed in \`$HOME/.rbenv/bin', but that"
      echo "directory is not present in PATH. Please add it to PATH by configuring"
      echo "your \`~/${bashrc}', \`~/.zshrc', or \`~/.config/fish/config.fish'."
    else
      echo "Please refer to https://github.com/rbenv/rbenv#installation"
    fi
  } | indent
  exit 1
elif [ $num_locations -eq 1 ]; then
  printc green "%s\n" "$(which rbenv)"
else
  printc yellow "multiple\n"
  { echo "You seem to have multiple rbenv installs in the following locations."
    echo "Please pick just one installation and remove the others."
    echo
    which -a rbenv
  } | indent
  echo
  : $((warnings++))
fi

RBENV_ROOT="${RBENV_ROOT:-$(rbenv root)}"

OLDIFS="$IFS"
IFS=:
path=($PATH)
IFS="$OLDIFS"

echo -n "Checking for rbenv shims in PATH: "
shims_dir="${RBENV_ROOT}/shims"
found=""
for dir in "${path[@]}"; do [ "$dir" != "$shims_dir" ] || found=true; done
if [ -n "$found" ]; then
  printc green "OK\n"
else
  printc red "not found\n"
  { echo "The directory \`$shims_dir' must be present in PATH for rbenv to work."
    echo "Please run \`rbenv init' and follow the instructions."
  } | indent
  echo
  : $((warnings++))
fi

echo -n "Checking \`rbenv install' support: "
rbenv_installs="$({ ls "$RBENV_ROOT"/plugins/*/bin/rbenv-install 2>/dev/null || true
                    which -a rbenv-install 2>/dev/null || true
                  } | uniq)"
num_installs="$(wc -l <<<"$rbenv_installs")"
if [ -z "$rbenv_installs" ]; then
  printc red "not found\n"
  { echo "Unless you plan to add Ruby versions manually, you should install ruby-build."
    echo "Please refer to https://github.com/rbenv/ruby-build#installation"
  }
  echo
  : $((warnings++))
elif [ $num_installs -eq 1 ]; then
  printc green "$rbenv_installs"
  if [[ $rbenv_installs == "$RBENV_ROOT"/plugins/* ]]; then
    rbenv_install_cmd="${rbenv_installs##*/}"
    rbenv_install_version="$(rbenv "${rbenv_install_cmd#rbenv-}" --version || true)"
  else
    rbenv_install_version="$("$rbenv_installs" --version || true)"
  fi
  printf " (%s)\n" "$rbenv_install_version"
else
  printc yellow "multiple\n"
  { echo "You seem to have multiple \`rbenv-install' in the following locations."
    echo "Please pick just one installation and remove the others."
    echo
    echo "$rbenv_installs"
  } | indent
  echo
  : $((warnings++))
fi

echo -n "Counting installed Ruby versions: "
num_rubies="$(rbenv versions --bare | wc -l)"
if [ $num_rubies -eq 0 ]; then
  printc yellow "none\n"
  echo "There aren't any Ruby versions installed under \`$RBENV_ROOT/versions'." | indent
  [ $num_installs -eq 0 ] || {
    echo -n "You can install Ruby versions like so: "
    printc bright "rbenv install 2.2.4\n"
  } | indent
else
  printc green "%d versions\n" $num_rubies
fi

echo -n "Checking RubyGems settings: "
gem_broken=0
for gemrc in ~/.gemrc /etc/gemrc; do
  if grep -v '^#' "$gemrc" 2>/dev/null | grep -q -e --user-install; then
    [ "$((gem_broken++))" -gt 0 ] || printc yellow "warning\n"
    echo "Please remove \`--user-install' flag from \`$gemrc'." | indent
    : $((warnings++))
  fi
done
[ "$gem_broken" -gt 0 ] || printc green "OK\n"

echo -n "Auditing installed plugins: "
OLDIFS="$IFS"
IFS=$'\n'
hooks=(`rbenv hooks exec`)
IFS="$OLDIFS"
plugin_broken=0
for hook in "${hooks[@]}"; do
  plugin_name=
  message=
  case "$hook" in
  */"~gem-rehash.bash" )
    plugin_name=rbenv-gem-rehash
    message="functionality is now included in rbenv core. Please remove the plugin."
    ;;
  */"bundler.bash" )
    plugin_name=rbenv-bundler
    message="is considered harmful. Please remove the plugin and \`rm -rf \$(rbenv root)/shims && rbenv rehash'."
    ;;
  esac

  if [ -n "$plugin_name" ]; then
    [ "$((plugin_broken++))" -gt 0 ] || printc yellow "warning\n"
    { printc bright "$plugin_name"
      echo " $message"
      echo "  (found in \`${hook}')"
    } | indent
    : $((warnings++))
  fi
done
[ "$plugin_broken" -gt 0 ] || printc green "OK\n"

[ $warnings -eq 0 ]

Checking for `rbenv' in PATH: /usr/local/bin/rbenv
Checking for rbenv shims in PATH: OK
Checking `rbenv install' support: /usr/local/bin/rbenv-install (ruby-build 20170523)
Counting installed Ruby versions: none
  There aren't any Ruby versions installed under `~/.rbenv/versions'.
  You can install Ruby versions like so: rbenv install 2.2.4
Checking RubyGems settings: OK
Auditing installed plugins: OK

Checking for rbenv shims in PATH: NOT FOUND

$ sudo gem update --system

$ gem sources --remove https://rubygems.org/

$ gem sources --add https://gems.ruby-china.com/

$ gem sources -l
*** CURRENT SOURCES ***

https://gems.ruby-china.com/

$ sudo gem install -n /usr/local/bin cocoapods

$ sudo xcode-select -switch /Applications/Xcode.app/Contents/Developer

$ pod setup
Setting up CocoaPods master repo
  $ /usr/bin/git clone https://github.com/CocoaPods/Specs.git master --progress
  Cloning into 'master'...
  remote: Counting objects: 1879515, done.        
  remote: Compressing objects: 100% (321/321), done.        
  Receiving objects:  21% (404525/1879515), 73.70 MiB | 22.00 KiB/

git clone https://github.com/CocoaPods/Specs.git ~/.cocoapods/repos/trunk

git clone https://mirrors.tuna.tsinghua.edu.cn/git/CocoaPods/Specs.git  ~/.cocoapods/repos/trunk

// 安装最新版cocoapods
$ sudo gem install cocoapods --pre
// 移除本地master
$ sudo rm -fr ~/.cocoapods/repos/master
// 移除本地缓存
$ sudo rm -fr ~/Library/Caches/CocoaPods/
// 重新setup，如果很慢可使用问题1的解决方法（git clone）
$ pod setup --verbose
// 移除trunk
$ pod repo remove trunk