From 3c1e7fd60d012744200575b9c570982a72c6bbe5 Mon Sep 17 00:00:00 2001
From: neo <arklove@qq.com>
Date: Tue, 9 Mar 2021 11:41:39 +0800
Subject: [PATCH] =?UTF-8?q?feat:=20=E6=9B=B4=E6=96=B0=E8=84=9A=E6=9C=AC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .github/workflows/tests.yml |  19 +
 install-origin.sh           | 116 ++++--
 install-tsinghua.sh         | 730 ------------------------------------
 install.sh                  | 125 ++++--
 4 files changed, 191 insertions(+), 799 deletions(-)
 delete mode 100755 install-tsinghua.sh

diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 6414032..363b0c2 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -83,6 +83,25 @@ jobs:
 
       - run: /bin/bash uninstall.sh -f >/dev/null
 
+      - name: Install Homebrew with GitHub remotes
+        # Use the default remotes but with Git Protocol
+        run: |
+          HOMEBREW_BREW_DEFAULT_GIT_REMOTE="https://github.com/Homebrew/brew"
+          if [ "${{ runner.os }}" = "macOS" ]; then
+            HOMEBREW_CORE_DEFAULT_GIT_REMOTE="https://github.com/Homebrew/homebrew-core"
+          else
+            HOMEBREW_CORE_DEFAULT_GIT_REMOTE="https://github.com/Homebrew/linuxbrew-core"
+          fi
+          export HOMEBREW_BREW_GIT_REMOTE="${HOMEBREW_BREW_DEFAULT_GIT_REMOTE/%https/git}"
+          export HOMEBREW_CORE_GIT_REMOTE="${HOMEBREW_CORE_DEFAULT_GIT_REMOTE/%https/git}"
+          /bin/bash -c "$(cat install.sh)"
+
+      - run: brew config
+
+      - run: |
+          /bin/bash uninstall.sh -f >/dev/null
+          unset HOMEBREW_{BREW,CORE}{,_DEFAULT}_GIT_REMOTE
+
       - run: /bin/bash -c "$(cat install.sh)"
 
       - name: Uninstall and reinstall with sudo NOPASSWD
diff --git a/install-origin.sh b/install-origin.sh
index 47d0b5d..08a5b03 100755
--- a/install-origin.sh
+++ b/install-origin.sh
@@ -1,17 +1,21 @@
 #!/bin/bash
 set -u
 
+abort() {
+  printf "%s\n" "$@"
+  exit 1
+}
+
+if [ -z "${BASH_VERSION:-}" ]; then
+  abort "Bash is required to interpret this script."
+fi
+
 # Check if script is run non-interactively (e.g. CI)
 # If it is run non-interactively we should not prompt for passwords.
 if [[ ! -t 0 || -n "${CI-}" ]]; then
   NONINTERACTIVE=1
 fi
 
-abort() {
-  printf "%s\n" "$1"
-  exit 1
-}
-
 # First check OS.
 OS="$(uname)"
 if [[ "$OS" == "Linux" ]]; then
@@ -20,12 +24,12 @@ elif [[ "$OS" != "Darwin" ]]; then
   abort "Homebrew is only supported on macOS and Linux."
 fi
 
-UNAME_MACHINE="$(uname -m)"
-
 # Required installation paths. To install elsewhere (which is unsupported)
 # you can untar https://github.com/Homebrew/brew/tarball/master
 # anywhere you like.
 if [[ -z "${HOMEBREW_ON_LINUX-}" ]]; then
+  UNAME_MACHINE="$(/usr/bin/uname -m)"
+
   if [[ "$UNAME_MACHINE" == "arm64" ]]; then
     # On ARM macOS, this script installs to /opt/homebrew only
     HOMEBREW_PREFIX="/opt/homebrew"
@@ -36,7 +40,7 @@ if [[ -z "${HOMEBREW_ON_LINUX-}" ]]; then
     HOMEBREW_REPOSITORY="${HOMEBREW_PREFIX}/Homebrew"
   fi
   HOMEBREW_CACHE="${HOME}/Library/Caches/Homebrew"
-  HOMEBREW_CORE_GIT_REMOTE="https://github.com/Homebrew/homebrew-core"
+  HOMEBREW_CORE_DEFAULT_GIT_REMOTE="https://github.com/Homebrew/homebrew-core"
 
   STAT="stat -f"
   CHOWN="/usr/sbin/chown"
@@ -44,11 +48,13 @@ if [[ -z "${HOMEBREW_ON_LINUX-}" ]]; then
   GROUP="admin"
   TOUCH="/usr/bin/touch"
 else
+  UNAME_MACHINE="$(uname -m)"
+
   # On Linux, it installs to /home/linuxbrew/.linuxbrew if you have sudo access
   # and ~/.linuxbrew (which is unsupported) if run interactively.
   HOMEBREW_PREFIX_DEFAULT="/home/linuxbrew/.linuxbrew"
   HOMEBREW_CACHE="${HOME}/.cache/Homebrew"
-  HOMEBREW_CORE_GIT_REMOTE="https://github.com/Homebrew/linuxbrew-core"
+  HOMEBREW_CORE_DEFAULT_GIT_REMOTE="https://github.com/Homebrew/linuxbrew-core"
 
   STAT="stat --printf"
   CHOWN="/bin/chown"
@@ -56,7 +62,19 @@ else
   GROUP="$(id -gn)"
   TOUCH="/bin/touch"
 fi
-HOMEBREW_BREW_GIT_REMOTE="https://github.com/Homebrew/brew"
+HOMEBREW_BREW_DEFAULT_GIT_REMOTE="https://github.com/Homebrew/brew"
+
+# Use remote URLs of Homebrew repositories from environment if set.
+HOMEBREW_BREW_GIT_REMOTE="${HOMEBREW_BREW_GIT_REMOTE:-"${HOMEBREW_BREW_DEFAULT_GIT_REMOTE}"}"
+HOMEBREW_CORE_GIT_REMOTE="${HOMEBREW_CORE_GIT_REMOTE:-"${HOMEBREW_CORE_DEFAULT_GIT_REMOTE}"}"
+# The URLs with and without the '.git' suffix are the same Git remote. Do not prompt.
+if [[ "$HOMEBREW_BREW_GIT_REMOTE" == "${HOMEBREW_BREW_DEFAULT_GIT_REMOTE}.git" ]]; then
+  HOMEBREW_BREW_GIT_REMOTE="${HOMEBREW_BREW_DEFAULT_GIT_REMOTE}"
+fi
+if [[ "$HOMEBREW_CORE_GIT_REMOTE" == "${HOMEBREW_CORE_DEFAULT_GIT_REMOTE}.git" ]]; then
+  HOMEBREW_CORE_GIT_REMOTE="${HOMEBREW_CORE_DEFAULT_GIT_REMOTE}"
+fi
+export HOMEBREW_{BREW,CORE}_GIT_REMOTE
 
 # TODO: bump version when new macOS is released or announced
 MACOS_NEWEST_UNSUPPORTED="12.0"
@@ -107,7 +125,7 @@ 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)!"
+    abort "Need sudo access on macOS (e.g. the user $USER needs to be an Administrator)!"
   fi
 
   return "$HAVE_SUDO_ACCESS"
@@ -163,6 +181,13 @@ getc() {
   /bin/stty "$save_state"
 }
 
+ring_bell() {
+  # Use the shell's audible bell.
+  if [[ -t 1 ]]; then
+    printf "\a"
+  fi
+}
+
 wait_for_user() {
   local c
   echo
@@ -304,6 +329,9 @@ EOABORT
 )"
 fi
 
+# shellcheck disable=SC2016
+ohai 'Checking for `sudo` access (which may request your password).'
+
 if [[ -z "${HOMEBREW_ON_LINUX-}" ]]; then
   have_sudo_access
 else
@@ -495,7 +523,24 @@ if should_install_command_line_tools; then
   ohai "The Xcode Command Line Tools will be installed."
 fi
 
+non_default_repos=""
+additional_shellenv_commands=()
+if [[ "$HOMEBREW_BREW_DEFAULT_GIT_REMOTE" != "$HOMEBREW_BREW_GIT_REMOTE" ]]; then
+  ohai "HOMEBREW_BREW_GIT_REMOTE is set to a non-default URL:"
+  echo "${tty_underline}${HOMEBREW_BREW_GIT_REMOTE}${tty_reset} will be used for Homebrew/brew Git remote."
+  non_default_repos="Homebrew/brew"
+  additional_shellenv_commands+=("export HOMEBREW_BREW_GIT_REMOTE=\"$HOMEBREW_BREW_GIT_REMOTE\"")
+fi
+
+if [[ "$HOMEBREW_CORE_DEFAULT_GIT_REMOTE" != "$HOMEBREW_CORE_GIT_REMOTE" ]]; then
+  ohai "HOMEBREW_CORE_GIT_REMOTE is set to a non-default URL:"
+  echo "${tty_underline}${HOMEBREW_CORE_GIT_REMOTE}${tty_reset} will be used for Homebrew/core Git remote."
+  non_default_repos="${non_default_repos:-}${non_default_repos:+ and }Homebrew/core"
+  additional_shellenv_commands+=("export HOMEBREW_CORE_GIT_REMOTE=\"$HOMEBREW_CORE_GIT_REMOTE\"")
+fi
+
 if [[ -z "${NONINTERACTIVE-}" ]]; then
+  ring_bell
   wait_for_user
 fi
 
@@ -648,10 +693,7 @@ fi
 ohai "Installation successful!"
 echo
 
-# Use the shell's audible bell.
-if [[ -t 1 ]]; then
-  printf "\a"
-fi
+ring_bell
 
 # Use an extra newline and bold to avoid this being missed.
 ohai "Homebrew has enabled anonymous aggregate formulae and cask analytics."
@@ -677,29 +719,37 @@ EOS
 ) || exit 1
 
 ohai "Next steps:"
-if [[ "$UNAME_MACHINE" == "arm64" ]] || [[ -n "${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="$HOME/.zprofile"
-      ;;
-    *)
+case "$SHELL" in
+  */bash*)
+    if [[ -r "$HOME/.bash_profile" ]]; then
+      shell_profile="$HOME/.bash_profile"
+    else
       shell_profile="$HOME/.profile"
-      ;;
-  esac
-
+    fi
+    ;;
+  */zsh*)
+    shell_profile="$HOME/.zprofile"
+    ;;
+  *)
+    shell_profile="$HOME/.profile"
+    ;;
+esac
+if [[ "$UNAME_MACHINE" == "arm64" ]] || [[ -n "${HOMEBREW_ON_LINUX-}" ]]; then
   cat <<EOS
 - Add Homebrew to your ${tty_bold}PATH${tty_reset} in ${tty_underline}${shell_profile}${tty_reset}:
-    echo 'eval \$(${HOMEBREW_PREFIX}/bin/brew shellenv)' >> ${shell_profile}
-    eval \$(${HOMEBREW_PREFIX}/bin/brew shellenv)
+    echo 'eval "\$(${HOMEBREW_PREFIX}/bin/brew shellenv)"' >> ${shell_profile}
+    eval "\$(${HOMEBREW_PREFIX}/bin/brew shellenv)"
 EOS
 fi
+if [[ -n "${non_default_repos}" ]]; then
+  s=""
+  if [[ "${#additional_shellenv_commands[@]}" -gt 1 ]]; then
+    s="s"
+  fi
+  echo "- Add the non-default Git remote${s} for ${non_default_repos} in ${tty_underline}${shell_profile}${tty_reset}:"
+  printf "    echo '%s' >> ${shell_profile}\n" "${additional_shellenv_commands[@]}"
+  printf "    %s\n" "${additional_shellenv_commands[@]}"
+fi
 
 echo "- Run \`brew help\` to get started"
 echo "- Further documentation: "
diff --git a/install-tsinghua.sh b/install-tsinghua.sh
deleted file mode 100755
index 228c0de..0000000
--- a/install-tsinghua.sh
+++ /dev/null
@@ -1,730 +0,0 @@
-#!/bin/bash
-set -u
-
-# Check if script is run non-interactively (e.g. CI)
-# If it is run non-interactively we should not prompt for passwords.
-if [[ ! -t 0 || -n "${CI-}" ]]; then
-  NONINTERACTIVE=1
-fi
-
-abort() {
-  printf "%s\n" "$1"
-  exit 1
-}
-
-# First check OS.
-OS="$(uname)"
-if [[ "$OS" == "Linux" ]]; then
-  HOMEBREW_ON_LINUX=1
-elif [[ "$OS" != "Darwin" ]]; then
-  abort "Homebrew is only supported on macOS and Linux."
-fi
-
-UNAME_MACHINE="$(uname -m)"
-
-# Required installation paths. To install elsewhere (which is unsupported)
-# you can untar https://github.com/Homebrew/brew/tarball/master
-# anywhere you like.
-if [[ -z "${HOMEBREW_ON_LINUX-}" ]]; then
-  if [[ "$UNAME_MACHINE" == "arm64" ]]; then
-    # On ARM macOS, this script installs to /opt/homebrew only
-    HOMEBREW_PREFIX="/opt/homebrew"
-    HOMEBREW_REPOSITORY="${HOMEBREW_PREFIX}"
-  else
-    # On Intel macOS, this script installs to /usr/local only
-    HOMEBREW_PREFIX="/usr/local"
-    HOMEBREW_REPOSITORY="${HOMEBREW_PREFIX}/Homebrew"
-  fi
-  HOMEBREW_CACHE="${HOME}/Library/Caches/Homebrew"
-  #changed HOMEBREW_CORE_GIT_REMOTE="https://github.com/Homebrew/homebrew-core"
-  HOMEBREW_CORE_GIT_REMOTE="https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/homebrew-core.git"
-
-  STAT="stat -f"
-  CHOWN="/usr/sbin/chown"
-  CHGRP="/usr/bin/chgrp"
-  GROUP="admin"
-  TOUCH="/usr/bin/touch"
-else
-  # On Linux, it installs to /home/linuxbrew/.linuxbrew if you have sudo access
-  # and ~/.linuxbrew (which is unsupported) if run interactively.
-  HOMEBREW_PREFIX_DEFAULT="/home/linuxbrew/.linuxbrew"
-  HOMEBREW_CACHE="${HOME}/.cache/Homebrew"
-  #changed HOMEBREW_CORE_GIT_REMOTE="https://github.com/Homebrew/linuxbrew-core"
-  HOMEBREW_CORE_GIT_REMOTE="https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/homebrew-core.git"
-
-  STAT="stat --printf"
-  CHOWN="/bin/chown"
-  CHGRP="/bin/chgrp"
-  GROUP="$(id -gn)"
-  TOUCH="/bin/touch"
-fi
-#changed HOMEBREW_BREW_GIT_REMOTE="https://github.com/Homebrew/brew"
-HOMEBREW_BREW_GIT_REMOTE="https://mirrors.tuna.tsinghua.edu.cn/git/homebrew/brew.git"
-
-# TODO: bump version when new macOS is released or announced
-MACOS_NEWEST_UNSUPPORTED="12.0"
-# TODO: bump version when new macOS is released
-MACOS_OLDEST_SUPPORTED="10.14"
-
-# 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 "${SUDO_ASKPASS-}" ]]; then
-    args=("-A")
-  elif [[ -n "${NONINTERACTIVE-}" ]]; then
-    args=("-n")
-  fi
-
-  if [[ -z "${HAVE_SUDO_ACCESS-}" ]]; then
-    if [[ -n "${args[*]-}" ]]; then
-      SUDO="/usr/bin/sudo ${args[*]}"
-    else
-      SUDO="/usr/bin/sudo"
-    fi
-    if [[ -n "${NONINTERACTIVE-}" ]]; then
-      ${SUDO} -l mkdir &>/dev/null
-    else
-      ${SUDO} -v && ${SUDO} -l mkdir &>/dev/null
-    fi
-    HAVE_SUDO_ACCESS="$?"
-  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 "$1")"
-}
-
-execute() {
-  if ! "$@"; then
-    abort "$(printf "Failed during: %s" "$(shell_join "$@")")"
-  fi
-}
-
-execute_sudo() {
-  local -a args=("$@")
-  if have_sudo_access; then
-    if [[ -n "${SUDO_ASKPASS-}" ]]; then
-      args=("-A" "${args[@]}")
-    fi
-    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 "${x%%.*}")"
-}
-
-version_gt() {
-  [[ "${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 "${2#*.}" ]]
-}
-
-should_install_command_line_tools() {
-  if [[ -n "${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") "*  ]]
-}
-
-# 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
-      IFS=$' \t\n' # Restore IFS to its default value
-      return 1
-    fi
-  done
-  IFS=$' \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 ! command -v git >/dev/null; then
-    abort "$(cat <<EOABORT
-You must install Git before installing Homebrew. See:
-  ${tty_underline}https://docs.brew.sh/Installation${tty_reset}
-EOABORT
-)"
-fi
-
-if ! command -v curl >/dev/null; then
-    abort "$(cat <<EOABORT
-You must install cURL before installing Homebrew. See:
-  ${tty_underline}https://docs.brew.sh/Installation${tty_reset}
-EOABORT
-)"
-fi
-
-if [[ -z "${HOMEBREW_ON_LINUX-}" ]]; then
-  have_sudo_access
-else
-  if [[ -n "${NONINTERACTIVE-}" ]] ||
-     [[ -w "${HOMEBREW_PREFIX_DEFAULT}" ]] ||
-     [[ -w "/home/linuxbrew" ]] ||
-     [[ -w "/home" ]]; then
-    HOMEBREW_PREFIX="$HOMEBREW_PREFIX_DEFAULT"
-  else
-    trap exit SIGINT
-    if ! /usr/bin/sudo -n -v &>/dev/null; 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="${HOMEBREW_PREFIX}/Homebrew"
-fi
-HOMEBREW_CORE="${HOMEBREW_REPOSITORY}/Library/Taps/homebrew/homebrew-core"
-
-if [[ "${EUID:-${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
-  # On macOS, support 64-bit Intel and ARM
-  if [[ "$UNAME_MACHINE" != "arm64" ]] && [[ "$UNAME_MACHINE" != "x86_64" ]]; then
-    abort "Homebrew is only supported on Intel and ARM processors!"
-  fi
-else
-  # On Linux, support only 64-bit Intel
-  if [[ "$UNAME_MACHINE" == "arm64" ]]; then
-    abort "$(cat <<EOABORT
-Homebrew on Linux is not supported on ARM processors.
-You can try an alternate installation method instead:
-  ${tty_underline}https://docs.brew.sh/Homebrew-on-Linux#arm${tty_reset}
-EOABORT
-)"
-  elif [[ "$UNAME_MACHINE" != "x86_64" ]]; then
-    abort "Homebrew on Linux is only supported on Intel processors!"
-  fi
-fi
-
-if [[ -z "${HOMEBREW_ON_LINUX-}" ]]; then
-  macos_version="$(major_minor "$(/usr/bin/sw_vers -productVersion)")"
-  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 "$macos_version" "10.10"; then
-    abort "Your OS X version is too old"
-  elif version_ge "$macos_version" "$MACOS_NEWEST_UNSUPPORTED" || \
-    version_lt "$macos_version" "$MACOS_OLDEST_SUPPORTED"; then
-    who="We"
-    what=""
-    if version_ge "$macos_version" "$MACOS_NEWEST_UNSUPPORTED"; 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,
-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}/${dir}")
-done
-
-directories=(bin etc include lib sbin share var opt
-             share/zsh share/zsh/site-functions
-             var/homebrew var/homebrew/linked
-             Cellar Caskroom Frameworks)
-mkdirs=()
-for dir in "${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 [[ -z "${NONINTERACTIVE-}" ]]; then
-  wait_for_user
-fi
-
-if [[ -d "${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_REPOSITORY}" ]]; then
-  execute_sudo "/bin/mkdir" "-p" "${HOMEBREW_REPOSITORY}"
-fi
-execute_sudo "$CHOWN" "-R" "$USER:$GROUP" "${HOMEBREW_REPOSITORY}"
-
-if ! [[ -d "${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 "$CHOWN" "-R" "$USER" "${HOMEBREW_CACHE}"
-fi
-if file_not_grpowned "${HOMEBREW_CACHE}"; then
-  execute_sudo "$CHGRP" "-R" "$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" "${HOMEBREW_BREW_GIT_REMOTE}"
-  execute "git" "config" "remote.origin.fetch" "+refs/heads/*:refs/remotes/origin/*"
-
-  # ensure we don't munge line endings on checkout
-  execute "git" "config" "core.autocrlf" "false"
-
-  execute "git" "fetch" "--force" "origin"
-  execute "git" "fetch" "--force" "--tags" "origin"
-
-  execute "git" "reset" "--hard" "origin/master"
-
-  if [[ "${HOMEBREW_REPOSITORY}" != "${HOMEBREW_PREFIX}" ]]; then
-    execute "ln" "-sf" "${HOMEBREW_REPOSITORY}/bin/brew" "${HOMEBREW_PREFIX}/bin/brew"
-  fi
-
-  if [[ ! -d "${HOMEBREW_CORE}" ]]; then
-    ohai "Tapping homebrew/core"
-    (
-      execute "/bin/mkdir" "-p" "${HOMEBREW_CORE}"
-      cd "${HOMEBREW_CORE}" >/dev/null || return
-
-      execute "git" "init" "-q"
-      execute "git" "config" "remote.origin.url" "${HOMEBREW_CORE_GIT_REMOTE}"
-      execute "git" "config" "remote.origin.fetch" "+refs/heads/*:refs/remotes/origin/*"
-      execute "git" "config" "core.autocrlf" "false"
-      execute "git" "fetch" "--force" "origin" "refs/heads/master:refs/remotes/origin/master"
-      execute "git" "remote" "set-head" "origin" "--auto" >/dev/null
-      execute "git" "reset" "--hard" "origin/master"
-
-      cd "${HOMEBREW_REPOSITORY}" >/dev/null || return
-    ) || exit 1
-  fi
-
-  execute "${HOMEBREW_PREFIX}/bin/brew" "update" "--force" "--quiet"
-) || exit 1
-
-if [[ ":${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 "${HOMEBREW_REPOSITORY}" >/dev/null || return
-  execute "git" "config" "--replace-all" "homebrew.analyticsmessage" "true"
-  execute "git" "config" "--replace-all" "homebrew.caskanalyticsmessage" "true"
-) || exit 1
-
-ohai "Next steps:"
-if [[ "$UNAME_MACHINE" == "arm64" ]] || [[ -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
-- Add Homebrew to your ${tty_bold}PATH${tty_reset} in ${tty_underline}${shell_profile}${tty_reset}:
-    echo 'eval \$(${HOMEBREW_PREFIX}/bin/brew shellenv)' >> ${shell_profile}
-    eval \$(${HOMEBREW_PREFIX}/bin/brew shellenv)
-EOS
-fi
-
-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
-  echo "- Install the Homebrew dependencies if you have sudo access:"
-
-  if [[ $(command -v apt-get) ]]; then
-    echo "    sudo apt-get install build-essential"
-  elif [[ $(command -v yum) ]]; then
-    echo "    sudo yum groupinstall 'Development Tools'"
-  elif [[ $(command -v pacman) ]]; then
-    echo "    sudo pacman -S base-devel"
-  elif [[ $(command -v apk) ]]; then
-    echo "    sudo apk add build-base"
-  fi
-
-  cat <<EOS
-    See ${tty_underline}https://docs.brew.sh/linux${tty_reset} for more information
-- We recommend that you install GCC:
-    brew install gcc
-
-EOS
-fi
diff --git a/install.sh b/install.sh
index 19f0853..6e03069 100755
--- a/install.sh
+++ b/install.sh
@@ -1,17 +1,21 @@
 #!/bin/bash
 set -u
 
+abort() {
+  printf "%s\n" "$@"
+  exit 1
+}
+
+if [ -z "${BASH_VERSION:-}" ]; then
+  abort "Bash is required to interpret this script."
+fi
+
 # Check if script is run non-interactively (e.g. CI)
 # If it is run non-interactively we should not prompt for passwords.
 if [[ ! -t 0 || -n "${CI-}" ]]; then
   NONINTERACTIVE=1
 fi
 
-abort() {
-  printf "%s\n" "$1"
-  exit 1
-}
-
 # First check OS.
 OS="$(uname)"
 if [[ "$OS" == "Linux" ]]; then
@@ -20,12 +24,12 @@ elif [[ "$OS" != "Darwin" ]]; then
   abort "Homebrew is only supported on macOS and Linux."
 fi
 
-UNAME_MACHINE="$(uname -m)"
-
 # Required installation paths. To install elsewhere (which is unsupported)
 # you can untar https://github.com/Homebrew/brew/tarball/master
 # anywhere you like.
 if [[ -z "${HOMEBREW_ON_LINUX-}" ]]; then
+  UNAME_MACHINE="$(/usr/bin/uname -m)"
+
   if [[ "$UNAME_MACHINE" == "arm64" ]]; then
     # On ARM macOS, this script installs to /opt/homebrew only
     HOMEBREW_PREFIX="/opt/homebrew"
@@ -36,8 +40,9 @@ if [[ -z "${HOMEBREW_ON_LINUX-}" ]]; then
     HOMEBREW_REPOSITORY="${HOMEBREW_PREFIX}/Homebrew"
   fi
   HOMEBREW_CACHE="${HOME}/Library/Caches/Homebrew"
-  #changed HOMEBREW_CORE_GIT_REMOTE="https://github.com/Homebrew/homebrew-core"
-  HOMEBREW_CORE_GIT_REMOTE="https://mirrors.ustc.edu.cn/homebrew-core.git"
+  #changed
+  #HOMEBREW_CORE_DEFAULT_GIT_REMOTE="https://github.com/Homebrew/homebrew-core"
+  HOMEBREW_CORE_DEFAULT_GIT_REMOTE="https://mirrors.ustc.edu.cn/homebrew-core.git"
 
   STAT="stat -f"
   CHOWN="/usr/sbin/chown"
@@ -45,12 +50,15 @@ if [[ -z "${HOMEBREW_ON_LINUX-}" ]]; then
   GROUP="admin"
   TOUCH="/usr/bin/touch"
 else
+  UNAME_MACHINE="$(uname -m)"
+
   # On Linux, it installs to /home/linuxbrew/.linuxbrew if you have sudo access
   # and ~/.linuxbrew (which is unsupported) if run interactively.
   HOMEBREW_PREFIX_DEFAULT="/home/linuxbrew/.linuxbrew"
   HOMEBREW_CACHE="${HOME}/.cache/Homebrew"
-  #changed HOMEBREW_CORE_GIT_REMOTE="https://github.com/Homebrew/linuxbrew-core"
-  HOMEBREW_CORE_GIT_REMOTE="https://mirrors.ustc.edu.cn/homebrew-core.git"
+  #changed
+  #HOMEBREW_CORE_DEFAULT_GIT_REMOTE="https://github.com/Homebrew/linuxbrew-core"
+  HOMEBREW_CORE_DEFAULT_GIT_REMOTE="https://mirrors.ustc.edu.cn/linuxbrew-core.git"
 
   STAT="stat --printf"
   CHOWN="/bin/chown"
@@ -58,8 +66,21 @@ else
   GROUP="$(id -gn)"
   TOUCH="/bin/touch"
 fi
-#changed HOMEBREW_BREW_GIT_REMOTE="https://github.com/Homebrew/brew"
-HOMEBREW_BREW_GIT_REMOTE="https://mirrors.ustc.edu.cn/brew.git"
+#changed
+#HOMEBREW_BREW_DEFAULT_GIT_REMOTE="https://github.com/Homebrew/brew"
+HOMEBREW_BREW_DEFAULT_GIT_REMOTE="https://mirrors.ustc.edu.cn/brew.git"
+
+# Use remote URLs of Homebrew repositories from environment if set.
+HOMEBREW_BREW_GIT_REMOTE="${HOMEBREW_BREW_GIT_REMOTE:-"${HOMEBREW_BREW_DEFAULT_GIT_REMOTE}"}"
+HOMEBREW_CORE_GIT_REMOTE="${HOMEBREW_CORE_GIT_REMOTE:-"${HOMEBREW_CORE_DEFAULT_GIT_REMOTE}"}"
+# The URLs with and without the '.git' suffix are the same Git remote. Do not prompt.
+if [[ "$HOMEBREW_BREW_GIT_REMOTE" == "${HOMEBREW_BREW_DEFAULT_GIT_REMOTE}.git" ]]; then
+  HOMEBREW_BREW_GIT_REMOTE="${HOMEBREW_BREW_DEFAULT_GIT_REMOTE}"
+fi
+if [[ "$HOMEBREW_CORE_GIT_REMOTE" == "${HOMEBREW_CORE_DEFAULT_GIT_REMOTE}.git" ]]; then
+  HOMEBREW_CORE_GIT_REMOTE="${HOMEBREW_CORE_DEFAULT_GIT_REMOTE}"
+fi
+export HOMEBREW_{BREW,CORE}_GIT_REMOTE
 
 # TODO: bump version when new macOS is released or announced
 MACOS_NEWEST_UNSUPPORTED="12.0"
@@ -110,7 +131,7 @@ 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)!"
+    abort "Need sudo access on macOS (e.g. the user $USER needs to be an Administrator)!"
   fi
 
   return "$HAVE_SUDO_ACCESS"
@@ -166,6 +187,13 @@ getc() {
   /bin/stty "$save_state"
 }
 
+ring_bell() {
+  # Use the shell's audible bell.
+  if [[ -t 1 ]]; then
+    printf "\a"
+  fi
+}
+
 wait_for_user() {
   local c
   echo
@@ -307,6 +335,9 @@ EOABORT
 )"
 fi
 
+# shellcheck disable=SC2016
+ohai 'Checking for `sudo` access (which may request your password).'
+
 if [[ -z "${HOMEBREW_ON_LINUX-}" ]]; then
   have_sudo_access
 else
@@ -498,7 +529,24 @@ if should_install_command_line_tools; then
   ohai "The Xcode Command Line Tools will be installed."
 fi
 
+non_default_repos=""
+additional_shellenv_commands=()
+if [[ "$HOMEBREW_BREW_DEFAULT_GIT_REMOTE" != "$HOMEBREW_BREW_GIT_REMOTE" ]]; then
+  ohai "HOMEBREW_BREW_GIT_REMOTE is set to a non-default URL:"
+  echo "${tty_underline}${HOMEBREW_BREW_GIT_REMOTE}${tty_reset} will be used for Homebrew/brew Git remote."
+  non_default_repos="Homebrew/brew"
+  additional_shellenv_commands+=("export HOMEBREW_BREW_GIT_REMOTE=\"$HOMEBREW_BREW_GIT_REMOTE\"")
+fi
+
+if [[ "$HOMEBREW_CORE_DEFAULT_GIT_REMOTE" != "$HOMEBREW_CORE_GIT_REMOTE" ]]; then
+  ohai "HOMEBREW_CORE_GIT_REMOTE is set to a non-default URL:"
+  echo "${tty_underline}${HOMEBREW_CORE_GIT_REMOTE}${tty_reset} will be used for Homebrew/core Git remote."
+  non_default_repos="${non_default_repos:-}${non_default_repos:+ and }Homebrew/core"
+  additional_shellenv_commands+=("export HOMEBREW_CORE_GIT_REMOTE=\"$HOMEBREW_CORE_GIT_REMOTE\"")
+fi
+
 if [[ -z "${NONINTERACTIVE-}" ]]; then
+  ring_bell
   wait_for_user
 fi
 
@@ -651,10 +699,7 @@ fi
 ohai "Installation successful!"
 echo
 
-# Use the shell's audible bell.
-if [[ -t 1 ]]; then
-  printf "\a"
-fi
+ring_bell
 
 # Use an extra newline and bold to avoid this being missed.
 ohai "Homebrew has enabled anonymous aggregate formulae and cask analytics."
@@ -680,29 +725,37 @@ EOS
 ) || exit 1
 
 ohai "Next steps:"
-if [[ "$UNAME_MACHINE" == "arm64" ]] || [[ -n "${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="$HOME/.zprofile"
-      ;;
-    *)
+case "$SHELL" in
+  */bash*)
+    if [[ -r "$HOME/.bash_profile" ]]; then
+      shell_profile="$HOME/.bash_profile"
+    else
       shell_profile="$HOME/.profile"
-      ;;
-  esac
-
+    fi
+    ;;
+  */zsh*)
+    shell_profile="$HOME/.zprofile"
+    ;;
+  *)
+    shell_profile="$HOME/.profile"
+    ;;
+esac
+if [[ "$UNAME_MACHINE" == "arm64" ]] || [[ -n "${HOMEBREW_ON_LINUX-}" ]]; then
   cat <<EOS
 - Add Homebrew to your ${tty_bold}PATH${tty_reset} in ${tty_underline}${shell_profile}${tty_reset}:
-    echo 'eval \$(${HOMEBREW_PREFIX}/bin/brew shellenv)' >> ${shell_profile}
-    eval \$(${HOMEBREW_PREFIX}/bin/brew shellenv)
+    echo 'eval "\$(${HOMEBREW_PREFIX}/bin/brew shellenv)"' >> ${shell_profile}
+    eval "\$(${HOMEBREW_PREFIX}/bin/brew shellenv)"
 EOS
 fi
+if [[ -n "${non_default_repos}" ]]; then
+  s=""
+  if [[ "${#additional_shellenv_commands[@]}" -gt 1 ]]; then
+    s="s"
+  fi
+  echo "- Add the non-default Git remote${s} for ${non_default_repos} in ${tty_underline}${shell_profile}${tty_reset}:"
+  printf "    echo '%s' >> ${shell_profile}\n" "${additional_shellenv_commands[@]}"
+  printf "    %s\n" "${additional_shellenv_commands[@]}"
+fi
 
 echo "- Run \`brew help\` to get started"
 echo "- Further documentation: "