MAC安装brew和

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"

#!/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"
else
  HOMEBREW_PREFIX_DEFAULT="/home/linuxbrew/.linuxbrew"
  HOMEBREW_CACHE="${HOME}/.cache/Homebrew"

  STAT="stat --printf"
  CHOWN="/bin/chown"
  CHGRP="/bin/chgrp"
  GROUP="$(id -gn)"
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 </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 </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 <> ${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