iOS 手机非越狱 如何绑hosts

基于DNSMASQ 搭建个人的 DNS服务器(手机做hosts、host)

背景:
前端做项目时,方便起见,文件都存于服务器。

用电脑访问的时候可以 做hosts(也就是将域名转换为指定的ip去访问)

但是 iOS 和 Android 为 越狱破解的情况下,是没办法修改hosts文件的吗没有pc 方便,就在想,有没有办法可以使手机 通过pc端的host,这样就能达到效果。

其实原理也就是将 一台电脑作为dns服务器, 使你需要做host的手机经过这台 电脑来解析域名,制定到对应的ip地址。

需要借助的工具

DNSMASQ

mac下 安装步骤

1、通过终端 安装 brew

ruby -e “$(curl -fsSL https://raw.github.com/Homebrew/homebrew/go/install)”

2、通过brew 安装dnsmasq组件

brew install dnsmasq

3、等待安装完成后,如果 已存在/usr/local/etc/dnsmasq.conf,****就不需要一下操作,直接进入第4步请在**/usr/local/文件下新建一个etc文件夹。现在把/usr/local/opt/dnsmasq/****dnsmasq.conf.example文件拷贝至并重命名为/usr/local/etc/**dnsmasq.conf

4、查找出下列几行 = 之前的关键字,并去掉前边注释 #。

(1)resolv-file=/etc/resolv.conf

(2)strict-order

(3)listen-address=192.168.0.127,127.0.0.1

(4)addn-hosts=/etc/hosts //这歌地址指向的是你mac的hosts地址,你只需在里边做相应的 host

(5)cache-size=2048

第(3)把ip 192.168.0.127修改为你自己电脑当前的ip地址即可

其余的可不做修改。

5、确保pc 和 手机连接同一个路由器(局域网),将手机无线网的dns改为 此电脑的 ip地址

这样,你手机访问网络的时候就会自动去pc里的hosts文件进行查找

6、开启 重启指令

sudo launchctl stop homebrew.mxcl.dnsmasq

sudo launchctl start homebrew.mxcl.dnsmasq

sudo killall -HUP mDNSResponder

做一些 配置 可以支持 泛解析, 网上有相关文章

参考 https://blog.netsh.org/posts/mac-os-x-dnsmasq_1762.netsh.html

img

1)Mac上安装dnsmasq,命令: brew install dnsmasq;

2)修改服务的运行的配置文件。命令:sudovim /usr/local/etc/dnsmasq.conf

(修改这些地方:去掉对应的注释和添加最后一行

no-resolv

no-poll

listen-address=127.0.0.1,172.17.7.115(后面这个IP为自己Mac的IP)

添加这行:addn-hosts=/etc/dnsmasq.hosts )
注意:这样配置会导致,其他其他没绑hosts的域名无法访问

3)添加自定义的hosts文件(这个文件就类似IPhone手机的hosts文件,后续设置手机即可生效),并增加内容。

命令:sudovim /etc/dnsmasq.hosts

增加你要解析的域名和期望其对应的IP。如 1.2.3.4 www.baidu.com

4)以上几步dnsmasq的服务就配置完毕了,重启一下这个服务,配置才能生效。常用命令如下

启动

sudo brew services start dnsmasq

重启

sudo brew services restart dnsmasq

停止

sudo brew servicesstop dnsmasq

查看dnsmasq的运行

ps aux |grep dnsmasq

5)验证配置是否生效

dig www.baidu.com @127.0.0.1

当你看到

www.baidu.com 0 IN A 1.2.3.4

说明成功了,

6)配置手机连接这个Mac 的DNS服务,手机的某个Wi-Fi的网络设置内在DNS的服务加自己电脑的IP ,重新连接下这个Wi-Fi。

7)当hosts要变更,或者去掉自己增加的host,尝试了很多方法,电脑都会有缓存新的配置都不生效,最管用的方法是:修改 sudovim /etc/dnsmasq.hosts 自己的hosts文件后,重启dnsmasq服务,然后重启Mac 电脑。重新dig 查看就生效了。

安装homebrew时,可以把一下代码拷贝到一个shell文件中,后缀为.sh
执行
$ sh brew_install.sh


#!/bin/bash
set -u

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

# Check if macOS is ARM
if [[ "$(uname)" = "Darwin" ]] && [[ "$(sysctl -n hw.optional.arm64 2>/dev/null || echo '0')" = "1" ]]; then
  HOMEBREW_APPLE_SILICON=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"

# For Homebrew on Linux
REQUIRED_RUBY_VERSION=2.6  # https://github.com/Homebrew/brew/pull/6556
REQUIRED_GLIBC_VERSION=2.13  # https://docs.brew.sh/Homebrew-on-Linux#requirements

# 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() {
    
    
  local -a args
  if [[ -n "${SUDO_ASKPASS-}" ]]; then
    args=("-A")
  fi

  if [[ -z "${HAVE_SUDO_ACCESS-}" ]]; then
    if [[ -n "${args[*]-}" ]]; then
      /usr/bin/sudo "${args[@]}" -l mkdir &>/dev/null
    else
      /usr/bin/sudo -l mkdir &>/dev/null
    fi
    HAVE_SUDO_ACCESS="$?"
  fi

  if [[ -z "${HOMEBREW_ON_LINUX-}" ]] && [[ "$HAVE_SUDO_ACCESS" -ne 0 ]]; then
    abort "Need sudo access on macOS (e.g. the user $USER to be an Administrator)!"
  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 [[ -n "${HOMEBREW_APPLE_SILICON-}" ]]; 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") "*  ]]
}

# Please sync with 'test_ruby()' in 'Library/Homebrew/utils/ruby.sh' from Homebrew/brew repository.
test_ruby () {
    
    
  if [[ ! -x $1 ]]
  then
    return 1
  fi

  "$1" --enable-frozen-string-literal --disable=gems,did_you_mean,rubyopt -rrubygems -e \
    "abort if Gem::Version.new(RUBY_VERSION.to_s.dup).to_s.split('.').first(2) != \
              Gem::Version.new('$REQUIRED_RUBY_VERSION').to_s.split('.').first(2)" 2>/dev/null
}

no_usable_ruby() {
    
    
  local ruby_exec
  IFS=$'\n' # Do word splitting on new lines only
  for ruby_exec in $(which -a ruby); do
    if test_ruby "$ruby_exec"; then
      return 1
    fi
  done
  IFS=$' \t\n' # Restore IFS to its default value
  return 0
}

outdated_glibc() {
    
    
  local glibc_version
  glibc_version=$(ldd --version | head -n1 | grep -o '[0-9.]*$' | grep -o '^[0-9]\+\.[0-9]\+')
  version_lt "$glibc_version" "$REQUIRED_GLIBC_VERSION"
}

if [[ -n "${HOMEBREW_ON_LINUX-}" ]] && no_usable_ruby && outdated_glibc
then
    abort "$(cat <<-EOFABORT
	Homebrew requires Ruby $REQUIRED_RUBY_VERSION which was not found on your system.
	Homebrew portable Ruby requires Glibc version $REQUIRED_GLIBC_VERSION or newer,
	and your Glibc version is too old.
	See ${tty_underline}https://docs.brew.sh/Homebrew-on-Linux#requirements${tty_reset}
	Install Ruby $REQUIRED_RUBY_VERSION and add its location to your PATH.
	EOFABORT
    )"
fi

# 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 [[ -z "${HOMEBREW_ON_LINUX-}" ]]; then
 have_sudo_access
else
  if [[ -n "${CI-}" ]] || [[ -w "$HOMEBREW_PREFIX_DEFAULT" ]] || [[ -w "/home/linuxbrew" ]] || [[ -w "/home" ]]; then
    HOMEBREW_PREFIX="$HOMEBREW_PREFIX_DEFAULT"
  else
    trap exit SIGINT
    if [[ $(/usr/bin/sudo -n -l mkdir 2>&1) != *"mkdir"* ]]; 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 "$macos_version" "10.9"; then
    abort "Your OS X version is too old"
  elif version_gt "$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"
) || exit 1

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"
) || exit 1

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















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转载自blog.csdn.net/allanGold/article/details/108801236