Uninstall Homebrew

[Jason]

Has anyone put together a policy/script to uninstall homebrew with Jamf?

They have an uninstall script located here:

https://github.com/homebrew/install#uninstall-homebrew

But if I upload that to Jamf and run it with "--quiet --force" it throws an error shown below.  Seems like something from Jamf is adding a "/" argument to the script and it's causing it to fail.  

Script exit code: 1
Script result: Warning: Unrecognized option: '/'
Homebrew Uninstaller
Usage: /Library/Application Support/JAMF/tmp/uninstallHomebrew.sh [options]
    -p, --path=PATH  Sets Homebrew prefix. Defaults to /usr/local.
        --skip-cache-and-logs
                     Skips removal of HOMEBREW_CACHE and HOMEBREW_LOGS.
    -f, --force      Uninstall without prompting.
    -q, --quiet      Suppress all output.
    -n, --dry-run    Simulate uninstall but don't remove anything.
    -h, --help       Display this message.

[johandahl]

All scripts in JSS is called with 3 arguments

1) The root of the installation (usually / slash) this is causing the error message you got
2) The name of the computer
3) The user of the computer

Too fix this you have to remove these three arguments by using adding
shift 3
as the second line in the script.

[Jason]

Hi @johandahl 

I tried that but no luck.  Here's how the start of the script looks.  First line is blank, second has a #, and then the 3rd is where the script starts.

#
#!/bin/bash
set -u
shopt -s extglob

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

[johandahl · Accepted solution]

My suggestion was to change the script so the beginning

#!/bin/bash
set -u
shopt -s extglob

would become

#!/bin/bash
shift 3 # Remove / computername and user
set -u
shopt -s extglob

[mschroder]

The "#!..." must be the very first line of the script, otherwise the system will try to execute it in the current shell, which might or might not have use the same syntax. Before trying any changes to the script it might be useful to learn the basics of Unix scripting, in this particular case scripting in bash.

[Jason]

@johandahl "shift 3" helped. I wasn't aware bash had the built-in shift command.  So i was just thinking you had meant "shift 3" like a keyboard press (which would be a # character).  When i added "shift 3" to the second line of the script that did eliminate the first 3 parameters.  The homebrew script still threw an error saying "Warning: Unrecognized option: ''", but i was able to comment out that section and statically set the parameters from within the script, and that seems to have worked around the issue.  Thank you

[johandahl]

Nice I could help you 🙂

[JuneHeman]

Mind sharing the modifications you made to get this running?

[Jason]

Sure.  The policy itself just runs the uninstallHomebrew.sh script and doesn't pass it any parameters (probably a better way to handle that to make it more flexible).

I make the first change johandahl suggested with shift:

#!/bin/bash
shift 3 # this line gets added to ignore the 3 standard Jamf parameters

set -u
shopt -s extglob

Then i modify the default options so it uninstalls silently:

# Default options
opt_force="1"
opt_quiet="1"
opt_dry_run=""
opt_skip_cache_and_logs=""

Then i comment out the section that looks for parameters:

#while [[ $# -gt 0 ]]
#do
#  case "$1" in
#    -p*) homebrew_prefix_candidates+=("${1#-p}") ;;
#    --path=*) homebrew_prefix_candidates+=("${1#--path=}") ;;
#    --skip-cache-and-logs) opt_skip_cache_and_logs=1 ;;
#    -f | --force) opt_force=1 ;;
#    -q | --quiet) opt_quiet=1 ;;
#    -d | -n | --dry-run) opt_dry_run=1 ;;
#    -h | --help) usage ;;
#    *)
#      warn "Unrecognized option: '$1'"
#      usage 1
#      ;;
#  esac
#  shift
#done

Its pretty rushed and hacked together, but when i run the policy on a system Homebrew is gone, and thats all that mattered to me.  Down the line it might be nice to tweak it in a way that i can use parameters again, but i don't need that flexibility at the moment.

[bcbackes]

@Jason Are you willing to share your final Uninstall script for Homebrew? I'm trying to find a method for uninstalling as well.

[Jason]

Hi @bcbackes , here's what I'm using currently:

#!/bin/bash
shift 3

set -u
shopt -s extglob

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

strip_s() {
  local s
  for s in "$@"
  do
    s="${s## }"
    echo "${s%% }"
  done
}

dir_children() {
  local p
  for p in "$@"
  do
    [[ -d "${p}" ]] || continue
    find "${p}" -mindepth 1 -maxdepth 1
  done
}

# Set up temp dir
tmpdir="/tmp/uninstall.$$"
mkdir -p "${tmpdir}" || abort "Unable to create temp dir '${tmpdir}'"
trap '
  rm -fr "${tmpdir}"
  # Invalidate sudo timestamp before exiting
  /usr/bin/sudo -k
' EXIT

# Default options
opt_force="1"
opt_quiet="1"
opt_dry_run=""
opt_skip_cache_and_logs=""

# global status to indicate whether there is anything wrong.
failed=false

un="$(uname)"
case "${un}" in
  Linux)
    ostype=linux
    homebrew_prefix_default=/home/linuxbrew/.linuxbrew
    ;;
  Darwin)
    ostype=macos
    if [[ "$(uname -m)" == "arm64" ]]
    then
      homebrew_prefix_default=/opt/homebrew
    else
      homebrew_prefix_default=/usr/local
    fi
    realpath() {
      cd "$(dirname "$1")" && echo "$(pwd -P)/$(basename "$1")"
    }
    ;;
  *)
    abort "Unsupported system type '${un}'"
    ;;
esac

# string formatters
if [[ -t 1 ]]
then
  tty_escape() { printf "\033[%sm" "$1"; }
else
  tty_escape() { :; }
fi
tty_mkbold() { tty_escape "1;${1:-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
}

resolved_pathname() { realpath "$1"; }

pretty_print_pathnames() {
  local p
  for p in "$@"
  do
    if [[ -L "${p}" ]]
    then
      printf '%s -> %s\n' "${p}" "$(resolved_pathname "${p}")"
    elif [[ -d "${p}" ]]
    then
      echo "${p}/"
    else
      echo "${p}"
    fi
  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=("$@")
  if [[ -n "${SUDO_ASKPASS-}" ]]
  then
    args=("-A" "${args[@]}")
  fi
  if have_sudo_access
  then
    ohai "/usr/bin/sudo" "${args[@]}"
    system "/usr/bin/sudo" "${args[@]}"
  else
    ohai "${args[@]}"
    system "${args[@]}"
  fi
}

system() {
  if ! "$@"
  then
    warn "Failed during: $(shell_join "$@")"
    failed=true
  fi
}

####################################################################### script

homebrew_prefix_candidates=()

usage() {
  cat <<EOS
Homebrew Uninstaller
Usage: $0 [options]
    -p, --path=PATH  Sets Homebrew prefix. Defaults to ${homebrew_prefix_default}.
        --skip-cache-and-logs
                     Skips removal of HOMEBREW_CACHE and HOMEBREW_LOGS.
    -f, --force      Uninstall without prompting.
    -q, --quiet      Suppress all output.
    -n, --dry-run    Simulate uninstall but don't remove anything.
    -h, --help       Display this message.
EOS
  exit "${1:-0}"
}

#while [[ $# -gt 0 ]]
#do
#  case "$1" in
#    -p*) homebrew_prefix_candidates+=("${1#-p}") ;;
#    --path=*) homebrew_prefix_candidates+=("${1#--path=}") ;;
#    --skip-cache-and-logs) opt_skip_cache_and_logs=1 ;;
#    -f | --force) opt_force=1 ;;
#    -q | --quiet) opt_quiet=1 ;;
#    -d | -n | --dry-run) opt_dry_run=1 ;;
#    -h | --help) usage ;;
#    *)
#      warn "Unrecognized option: '$1'"
#      usage 1
#      ;;
#  esac
#  shift
#done

# Attempt to locate Homebrew unless `--path` is passed
if [[ "${#homebrew_prefix_candidates[@]}" -eq 0 ]]
then
  prefix="$(brew --prefix)"
  [[ -n "${prefix}" ]] && homebrew_prefix_candidates+=("${prefix}")
  prefix="$(command -v brew)" || prefix=""
  [[ -n "${prefix}" ]] && homebrew_prefix_candidates+=("$(dirname "$(dirname "$(strip_s "${prefix}")")")")
  homebrew_prefix_candidates+=("${homebrew_prefix_default}") # Homebrew default path
  homebrew_prefix_candidates+=("${HOME}/.linuxbrew")         # Linuxbrew default path
fi

HOMEBREW_PREFIX="$(
  for p in "${homebrew_prefix_candidates[@]}"
  do
    [[ -d "${p}" ]] || continue
    [[ ${p} == "${homebrew_prefix_default}" && -d "${p}/Homebrew/.git" ]] && echo "${p}" && break
    [[ -d "${p}/.git" || -x "${p}/bin/brew" ]] && echo "${p}" && break
  done
)"
[[ -n "${HOMEBREW_PREFIX}" ]] || abort "Failed to locate Homebrew!"

if [[ -d "${HOMEBREW_PREFIX}/.git" ]]
then
  HOMEBREW_REPOSITORY="$(dirname "$(realpath "${HOMEBREW_PREFIX}/.git")")"
elif [[ -x "${HOMEBREW_PREFIX}/bin/brew" ]]
then
  HOMEBREW_REPOSITORY="$(dirname "$(dirname "$(realpath "${HOMEBREW_PREFIX}/bin/brew")")")"
else
  abort "Failed to locate Homebrew!"
fi

if [[ -d "${HOMEBREW_PREFIX}/Cellar" ]]
then
  HOMEBREW_CELLAR="${HOMEBREW_PREFIX}/Cellar"
else
  HOMEBREW_CELLAR="${HOMEBREW_REPOSITORY}/Cellar"
fi

if [[ -s "${HOMEBREW_REPOSITORY}/.gitignore" ]]
then
  gitignore="$(<"${HOMEBREW_REPOSITORY}/.gitignore")"
else
  gitignore="$(curl -fsSL https://raw.githubusercontent.com/Homebrew/brew/HEAD/.gitignore)"
fi
[[ -n "${gitignore}" ]] || abort "Failed to fetch Homebrew .gitignore!"

{
  while read -r l
  do
    [[ "${l}" == \!* ]] || continue
    l="${l#\!}"
    l="${l#/}"
    [[ "${l}" == @(bin|share|share/doc) ]] && echo "REJECT: ${l}" >&2 && continue
    echo "${HOMEBREW_REPOSITORY}/${l}"
  done <<<"${gitignore}"

  if [[ "${HOMEBREW_PREFIX}" != "${HOMEBREW_REPOSITORY}" ]]
  then
    echo "${HOMEBREW_REPOSITORY}"
    directories=(
      bin/brew
      etc/bash_completion.d/brew
      share/doc/homebrew
      share/man/man1/brew.1
      share/man/man1/brew-cask.1
      share/man/man1/README.md
      share/zsh/site-functions/_brew
      share/zsh/site-functions/_brew_cask
      share/fish/vendor_completions.d/brew.fish
      var/homebrew
    )
    for p in "${directories[@]}"
    do
      echo "${HOMEBREW_PREFIX}/${p}"
    done
  else
    echo "${HOMEBREW_REPOSITORY}/.git"
  fi
  echo "${HOMEBREW_CELLAR}"
  echo "${HOMEBREW_PREFIX}/Caskroom"

  [[ -n ${opt_skip_cache_and_logs} ]] || cat <<-EOS
${HOME}/Library/Caches/Homebrew
${HOME}/Library/Logs/Homebrew
/Library/Caches/Homebrew
${HOME}/.cache/Homebrew
${HOMEBREW_CACHE:-}
${HOMEBREW_LOGS:-}
EOS

  if [[ "${ostype}" == macos ]]
  then
    dir_children "/Applications" "${HOME}/Applications" | while read -r p2; do
      [[ $(resolved_pathname "${p2}") == "${HOMEBREW_CELLAR}"/* ]] && echo "${p2}"
    done
  fi
} | while read -r l; do
  [[ -e "${l}" ]] && echo "${l}"
done | sort -u >"${tmpdir}/homebrew_files"
homebrew_files=()
while read -r l
do
  homebrew_files+=("${l}")
done <"${tmpdir}/homebrew_files"

if [[ -z "${opt_quiet}" ]]
then
  dry_str="${opt_dry_run:+would}"
  warn "This script ${dry_str:-will} remove:"
  pretty_print_pathnames "${homebrew_files[@]}"
fi

if [[ -t 0 && -z "${opt_force}" && -z "${opt_dry_run}" ]]
then
  read -rp "Are you sure you want to uninstall Homebrew? This will remove your installed packages! [y/N] "
  [[ "${REPLY}" == [yY]* ]] || abort
fi

[[ -n "${opt_quiet}" ]] || ohai "Removing Homebrew installation..."
paths=()
for p in Frameworks bin etc include lib opt sbin share var
do
  p="${HOMEBREW_PREFIX}/${p}"
  [[ -e "${p}" ]] && paths+=("${p}")
done
if [[ "${#paths[@]}" -gt 0 ]]
then
  if [[ "${ostype}" == macos ]]
  then
    args=(-E "${paths[@]}" -regex '.*/info/([^.][^/]*\.info|dir)')
  else
    args=("${paths[@]}" -regextype posix-extended -regex '.*/info/([^.][^/]*\.info|dir)')
  fi
  if [[ -n "${opt_dry_run}" ]]
  then
    args+=(-print)
    echo "Would delete:"
  else
    args+=(-exec /bin/bash -c)
    args+=("/usr/bin/install-info --delete --quiet {} \"\$(dirname {})/dir\"")
    args+=(';')
  fi
  system /usr/bin/find "${args[@]}"
  args=("${paths[@]}" -type l -lname '*/Cellar/*')
  if [[ -n "${opt_dry_run}" ]]
  then
    args+=(-print)
  else
    args+=(-exec unlink '{}' ';')
  fi
  [[ -n "${opt_dry_run}" ]] && echo "Would delete:"
  system /usr/bin/find "${args[@]}"
fi

for file in "${homebrew_files[@]}"
do
  if [[ -n "${opt_dry_run}" ]]
  then
    echo "Would delete ${file}"
  else
    if ! err="$(rm -fr "${file}" 2>&1)"
    then
      warn "Failed to delete ${file}"
      echo "${err}"
    fi
  fi
done

sudo() {
  ohai "/usr/bin/sudo" "$@"
  system /usr/bin/sudo "$@"
}

[[ -n "${opt_quiet}" ]] || ohai "Removing empty directories..."
paths=()
for p in bin etc include lib opt sbin share var Caskroom Cellar Homebrew Frameworks
do
  p="${HOMEBREW_PREFIX}/${p}"
  [[ -e "${p}" ]] && paths+=("${p}")
done
if [[ "${#paths[@]}" -gt 0 ]]
then
  if [[ "${ostype}" == macos ]]
  then
    args=("${paths[@]}" -name .DS_Store)
    if [[ -n "${opt_dry_run}" ]]
    then
      args+=(-print)
      echo "Would delete:"
    else
      args+=(-delete)
    fi
    execute_sudo /usr/bin/find "${args[@]}"
  fi
  args=("${paths[@]}" -depth -type d -empty)
  if [[ -n "${opt_dry_run}" ]]
  then
    args+=(-print)
    echo "Would remove directories:"
  else
    args+=(-exec rmdir '{}' ';')
  fi
  execute_sudo /usr/bin/find "${args[@]}"
fi

[[ -n "${opt_dry_run}" ]] && exit
if [[ "${HOMEBREW_PREFIX}" != "${homebrew_prefix_default}" && -e "${HOMEBREW_PREFIX}" ]]
then
  execute_sudo rmdir "${HOMEBREW_PREFIX}"
fi
if [[ "${HOMEBREW_PREFIX}" != "${HOMEBREW_REPOSITORY}" && -e "${HOMEBREW_REPOSITORY}" ]]
then
  execute_sudo rmdir "${HOMEBREW_REPOSITORY}"
fi

if [[ -z "${opt_quiet}" ]]
then
  if [[ "${failed}" == true ]]
  then
    warn "Homebrew partially uninstalled (but there were steps that failed)!"
    echo "To finish uninstalling rerun this script with \`sudo\`."
  else
    ohai "Homebrew uninstalled!"
  fi
fi

dir_children "${HOMEBREW_REPOSITORY}" "${HOMEBREW_PREFIX}" |
  sort -u >"${tmpdir}/residual_files"

if [[ -s "${tmpdir}/residual_files" && -z "${opt_quiet}" ]]
then
  echo "The following possible Homebrew files were not deleted:"
  while read -r f
  do
    pretty_print_pathnames "${f}"
  done <"${tmpdir}/residual_files"
  echo -e "You may wish to remove them yourself.\n"
fi

[[ "${failed}" != true ]]

[jhbush]

#!/bin/bash

NONINTERACTIVE=1 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/uninstall.sh)"

/bin/rm -rf /opt/homebrew

exit 0

https://github.com/homebrew/install#uninstall-homebrew

[dvasquez]

The script (from JP) will need to be run as the user and not as the jamf pro account.

I would add:

usr="$(/usr/bin/stat -f %Su /dev/console)"

/usr/bin/sudo -i -u "$usr" <the uninstall command>

[bcbackes]

Old post but here's what I'm currently using see below. I got it from here:
https://github.com/homebrew/install#uninstall-homebrew https://raw.githubusercontent.com/Homebrew/install/HEAD/uninstall.sh

#!/bin/bash

# We don't need return codes for "$(command)", only stdout is needed.
# Allow `[[ -n "$(command)" ]]`, `func "$(command)"`, pipes, etc.
# shellcheck disable=SC2312

set -u

abort() {
  printf "%s\n" "$@" >&2
  exit 1
}

# Fail fast with a concise message when not using bash
# Single brackets are needed here for POSIX compatibility
# shellcheck disable=SC2292
if [ -z "${BASH_VERSION:-}" ]
then
  abort "Bash is required to interpret this script."
fi

shopt -s extglob

strip_s() {
  local s
  for s in "$@"
  do
    s="${s## }"
    echo "${s%% }"
  done
}

dir_children() {
  local p
  for p in "$@"
  do
    [[ -d "${p}" ]] || continue
    find "${p}" -mindepth 1 -maxdepth 1
  done
}

# Set up temp dir
tmpdir="/tmp/uninstall.$$"
mkdir -p "${tmpdir}" || abort "Unable to create temp dir '${tmpdir}'"
trap '
  rm -fr "${tmpdir}"
  # Invalidate sudo timestamp before exiting
  /usr/bin/sudo -k
' EXIT

# Default options
opt_force=""
opt_quiet=""
opt_dry_run=""
opt_skip_cache_and_logs=""

# global status to indicate whether there is anything wrong.
failed=false

un="$(uname)"
case "${un}" in
  Linux)
    ostype=linux
    homebrew_prefix_default=/home/linuxbrew/.linuxbrew
    ;;
  Darwin)
    ostype=macos
    if [[ "$(uname -m)" == "arm64" ]]
    then
      homebrew_prefix_default=/opt/homebrew
    else
      homebrew_prefix_default=/usr/local
    fi
    realpath() {
      cd "$(dirname "$1")" && echo "$(pwd -P)/$(basename "$1")"
    }
    ;;
  *)
    abort "Unsupported system type '${un}'"
    ;;
esac

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

unset HAVE_SUDO_ACCESS # unset this from the environment

have_sudo_access() {
  if [[ ! -x "/usr/bin/sudo" ]]
  then
    return 1
  fi

  local -a SUDO=("/usr/bin/sudo")
  if [[ -n "${SUDO_ASKPASS-}" ]]
  then
    SUDO+=("-A")
  fi

  if [[ -z "${HAVE_SUDO_ACCESS-}" ]]
  then
    "${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 (e.g. the user ${USER} needs 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
}

resolved_pathname() { realpath "$1"; }

pretty_print_pathnames() {
  local p
  for p in "$@"
  do
    if [[ -L "${p}" ]]
    then
      printf '%s -> %s\n' "${p}" "$(resolved_pathname "${p}")"
    elif [[ -d "${p}" ]]
    then
      echo "${p}/"
    else
      echo "${p}"
    fi
  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[@]}"
    system "/usr/bin/sudo" "${args[@]}"
  else
    ohai "${args[@]}"
    system "${args[@]}"
  fi
}

system() {
  if ! "$@"
  then
    warn "Failed during: $(shell_join "$@")"
    failed=true
  fi
}

####################################################################### script

homebrew_prefix_candidates=()

usage() {
  cat <<EOS
Homebrew Uninstaller
Usage: $0 [options]
    -p, --path=PATH  Sets Homebrew prefix. Defaults to ${homebrew_prefix_default}.
        --skip-cache-and-logs
                     Skips removal of HOMEBREW_CACHE and HOMEBREW_LOGS.
    -f, --force      Uninstall without prompting.
    -q, --quiet      Suppress all output.
    -n, --dry-run    Simulate uninstall but don't remove anything.
    -h, --help       Display this message.
EOS
  exit "${1:-0}"
}

while [[ $# -gt 0 ]]
do
  case "$1" in
    -p*) homebrew_prefix_candidates+=("${1#-p}") ;;
    --path=*) homebrew_prefix_candidates+=("${1#--path=}") ;;
    --skip-cache-and-logs) opt_skip_cache_and_logs=1 ;;
    -f | --force) opt_force=1 ;;
    -q | --quiet) opt_quiet=1 ;;
    -d | -n | --dry-run) opt_dry_run=1 ;;
    -h | --help) usage ;;
    *)
      warn "Unrecognized option: '$1'"
      usage 1
      ;;
  esac
  shift
done

# Attempt to locate Homebrew unless `--path` is passed
if [[ "${#homebrew_prefix_candidates[@]}" -eq 0 ]]
then
  prefix="$(brew --prefix)"
  [[ -n "${prefix}" ]] && homebrew_prefix_candidates+=("${prefix}")
  prefix="$(command -v brew)" || prefix=""
  [[ -n "${prefix}" ]] && homebrew_prefix_candidates+=("$(dirname "$(dirname "$(strip_s "${prefix}")")")")
  homebrew_prefix_candidates+=("${homebrew_prefix_default}") # Homebrew default path
  homebrew_prefix_candidates+=("${HOME}/.linuxbrew")         # Linuxbrew default path
fi

HOMEBREW_PREFIX="$(
  for p in "${homebrew_prefix_candidates[@]}"
  do
    [[ -d "${p}" ]] || continue
    [[ ${p} == "${homebrew_prefix_default}" && -d "${p}/Homebrew/.git" ]] && echo "${p}" && break
    [[ -d "${p}/.git" || -x "${p}/bin/brew" ]] && echo "${p}" && break
  done
)"
[[ -n "${HOMEBREW_PREFIX}" ]] || abort "Failed to locate Homebrew!"

if [[ -d "${HOMEBREW_PREFIX}/.git" ]]
then
  HOMEBREW_REPOSITORY="$(dirname "$(realpath "${HOMEBREW_PREFIX}/.git")")"
elif [[ -x "${HOMEBREW_PREFIX}/bin/brew" ]]
then
  HOMEBREW_REPOSITORY="$(dirname "$(dirname "$(realpath "${HOMEBREW_PREFIX}/bin/brew")")")"
else
  abort "Failed to locate Homebrew!"
fi

if [[ -d "${HOMEBREW_PREFIX}/Cellar" ]]
then
  HOMEBREW_CELLAR="${HOMEBREW_PREFIX}/Cellar"
else
  HOMEBREW_CELLAR="${HOMEBREW_REPOSITORY}/Cellar"
fi

if [[ -s "${HOMEBREW_REPOSITORY}/.gitignore" ]]
then
  gitignore="$(<"${HOMEBREW_REPOSITORY}/.gitignore")"
else
  gitignore="$(curl -fsSL https://raw.githubusercontent.com/Homebrew/brew/HEAD/.gitignore)"
fi
[[ -n "${gitignore}" ]] || abort "Failed to fetch Homebrew .gitignore!"

{
  while read -r l
  do
    [[ "${l}" == \!* ]] || continue
    l="${l#\!}"
    l="${l#/}"
    [[ "${l}" == @(bin|share|share/doc) ]] && echo "REJECT: ${l}" >&2 && continue
    echo "${HOMEBREW_REPOSITORY}/${l}"
  done <<<"${gitignore}"

  if [[ "${HOMEBREW_PREFIX}" != "${HOMEBREW_REPOSITORY}" ]]
  then
    echo "${HOMEBREW_REPOSITORY}"
    directories=(
      bin/brew
      etc/bash_completion.d/brew
      share/doc/homebrew
      share/man/man1/brew.1
      share/man/man1/brew-cask.1
      share/man/man1/README.md
      share/zsh/site-functions/_brew
      share/zsh/site-functions/_brew_cask
      share/fish/vendor_completions.d/brew.fish
      var/homebrew
    )
    for p in "${directories[@]}"
    do
      echo "${HOMEBREW_PREFIX}/${p}"
    done
  else
    echo "${HOMEBREW_REPOSITORY}/.git"
  fi
  echo "${HOMEBREW_CELLAR}"
  echo "${HOMEBREW_PREFIX}/Caskroom"

  [[ -n ${opt_skip_cache_and_logs} ]] || cat <<-EOS
${HOME}/Library/Caches/Homebrew
${HOME}/Library/Logs/Homebrew
/Library/Caches/Homebrew
${HOME}/.cache/Homebrew
${HOMEBREW_CACHE:-}
${HOMEBREW_LOGS:-}
EOS

  if [[ "${ostype}" == macos ]]
  then
    dir_children "/Applications" "${HOME}/Applications" | while read -r p2; do
      [[ $(resolved_pathname "${p2}") == "${HOMEBREW_CELLAR}"/* ]] && echo "${p2}"
    done
  fi
} | while read -r l; do
  [[ -e "${l}" ]] && echo "${l}"
done | sort -u >"${tmpdir}/homebrew_files"
homebrew_files=()
while read -r l
do
  homebrew_files+=("${l}")
done <"${tmpdir}/homebrew_files"

if [[ -z "${opt_quiet}" ]]
then
  dry_str="${opt_dry_run:+would}"
  warn "This script ${dry_str:-will} remove:"
  pretty_print_pathnames "${homebrew_files[@]}"
fi

if [[ -t 0 && -z "${opt_force}" && -z "${opt_dry_run}" ]]
then
  read -rp "Are you sure you want to uninstall Homebrew? This will remove your installed packages! [y/N] "
  [[ "${REPLY}" == [yY]* ]] || abort
fi

[[ -n "${opt_quiet}" ]] || ohai "Removing Homebrew installation..."
paths=()
for p in Frameworks bin etc include lib opt sbin share var
do
  p="${HOMEBREW_PREFIX}/${p}"
  [[ -e "${p}" ]] && paths+=("${p}")
done
if [[ "${#paths[@]}" -gt 0 ]]
then
  if [[ "${ostype}" == macos ]]
  then
    args=(-E "${paths[@]}" -regex '.*/info/([^.][^/]*\.info|dir)')
  else
    args=("${paths[@]}" -regextype posix-extended -regex '.*/info/([^.][^/]*\.info|dir)')
  fi
  if [[ -n "${opt_dry_run}" ]]
  then
    args+=(-print)
    echo "Would delete:"
  else
    args+=(-exec /bin/bash -c)
    args+=("/usr/bin/install-info --delete --quiet {} \"\$(dirname {})/dir\"")
    args+=(';')
  fi
  system /usr/bin/find "${args[@]}"
  args=("${paths[@]}" -type l -lname '*/Cellar/*')
  if [[ -n "${opt_dry_run}" ]]
  then
    args+=(-print)
  else
    args+=(-exec unlink '{}' ';')
  fi
  [[ -n "${opt_dry_run}" ]] && echo "Would delete:"
  system /usr/bin/find "${args[@]}"
fi

for file in "${homebrew_files[@]}"
do
  if [[ -n "${opt_dry_run}" ]]
  then
    echo "Would delete ${file}"
  else
    if ! err="$(rm -fr "${file}" 2>&1)"
    then
      warn "Failed to delete ${file}"
      echo "${err}"
    fi
  fi
done

[[ -n "${opt_quiet}" ]] || ohai "Removing empty directories..."
paths=()
for p in bin etc include lib opt sbin share var Caskroom Cellar Homebrew Frameworks
do
  p="${HOMEBREW_PREFIX}/${p}"
  [[ -e "${p}" ]] && paths+=("${p}")
done
if [[ "${#paths[@]}" -gt 0 ]]
then
  if [[ "${ostype}" == macos ]]
  then
    args=("${paths[@]}" -name .DS_Store)
    if [[ -n "${opt_dry_run}" ]]
    then
      args+=(-print)
      echo "Would delete:"
    else
      args+=(-delete)
    fi
    execute_sudo /usr/bin/find "${args[@]}"
  fi
  args=("${paths[@]}" -depth -type d -empty)
  if [[ -n "${opt_dry_run}" ]]
  then
    args+=(-print)
    echo "Would remove directories:"
  else
    args+=(-exec rmdir '{}' ';')
  fi
  execute_sudo /usr/bin/find "${args[@]}"
fi

[[ -n "${opt_dry_run}" ]] && exit
if [[ "${HOMEBREW_PREFIX}" != "${homebrew_prefix_default}" && -e "${HOMEBREW_PREFIX}" ]]
then
  execute_sudo rmdir "${HOMEBREW_PREFIX}"
fi
if [[ "${HOMEBREW_PREFIX}" != "${HOMEBREW_REPOSITORY}" && -e "${HOMEBREW_REPOSITORY}" ]]
then
  execute_sudo rmdir "${HOMEBREW_REPOSITORY}"
fi

if [[ -z "${opt_quiet}" ]]
then
  if [[ "${failed}" == true ]]
  then
    warn "Homebrew partially uninstalled (but there were steps that failed)!"
    echo "To finish uninstalling rerun this script with \`sudo\`."
  else
    ohai "Homebrew uninstalled!"
  fi
fi

dir_children "${HOMEBREW_REPOSITORY}" "${HOMEBREW_PREFIX}" |
  sort -u >"${tmpdir}/residual_files"

if [[ -s "${tmpdir}/residual_files" && -z "${opt_quiet}" ]]
then
  echo "The following possible Homebrew files were not deleted:"
  while read -r f
  do
    pretty_print_pathnames "${f}"
  done <"${tmpdir}/residual_files"
  echo -e "You may wish to remove them yourself.\n"
fi

[[ "${failed}" != true ]]