250 lines
6.6 KiB
Bash
Executable File
250 lines
6.6 KiB
Bash
Executable File
#!/bin/bash
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set -u
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# Fail fast with concise message when not using bash
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# Single brackets is needed here for POSIX compatibility
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# shellcheck disable=SC2292
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if [ -z "${BASH_VERSION:-}" ]
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then
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echo "Error: Bash is required to run brew." >&2
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exit 1
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fi
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set +o posix # as we are using bash now
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# Fail fast with concise message when cwd does not exist
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if ! [[ -d "${PWD}" ]]
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then
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echo "Error: The current working directory doesn't exist, cannot proceed." >&2
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exit 1
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fi
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quiet_cd() {
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cd "$@" &>/dev/null || return
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}
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symlink_target_directory() {
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local target target_dirname
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target="$(readlink "$1")"
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target_dirname="$(dirname "${target}")"
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local directory="$2"
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quiet_cd "${directory}" && quiet_cd "${target_dirname}" && pwd -P
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}
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# Enable and use default Bash builtins rather than user-defined functions
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builtin enable compgen unset
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for cmd in $(builtin compgen -A builtin)
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do
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builtin unset -f "${cmd}"
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builtin enable "${cmd}"
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done
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unset cmd
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BREW_FILE_DIRECTORY="$(quiet_cd "${0%/*}/" && pwd -P)"
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HOMEBREW_BREW_FILE="${BREW_FILE_DIRECTORY%/}/${0##*/}"
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HOMEBREW_PREFIX="${HOMEBREW_BREW_FILE%/*/*}"
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# Default to / prefix if unset or the bin/brew file.
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if [[ -z "${HOMEBREW_PREFIX}" || "${HOMEBREW_PREFIX}" = "${HOMEBREW_BREW_FILE}" ]]
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then
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HOMEBREW_PREFIX="/"
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fi
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HOMEBREW_REPOSITORY="${HOMEBREW_PREFIX}"
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# Resolve the bin/brew symlink to find Homebrew's repository
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if [[ -L "${HOMEBREW_BREW_FILE}" ]]
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then
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BREW_FILE_DIRECTORY="$(symlink_target_directory "${HOMEBREW_BREW_FILE}" "${BREW_FILE_DIRECTORY}")"
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HOMEBREW_REPOSITORY="${BREW_FILE_DIRECTORY%/*}"
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fi
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# Try to find a /usr/local HOMEBREW_PREFIX where possible (for bottles)
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if [[ -L "/usr/local/bin/brew" && ! -L "${HOMEBREW_PREFIX}/Cellar" ]]
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then
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USR_LOCAL_BREW_FILE_DIRECTORY="$(symlink_target_directory "/usr/local/bin/brew" "/usr/local/bin")"
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USR_LOCAL_HOMEBREW_REPOSITORY="${USR_LOCAL_BREW_FILE_DIRECTORY%/*}"
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if [[ "${HOMEBREW_REPOSITORY}" = "${USR_LOCAL_HOMEBREW_REPOSITORY}" ]]
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then
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HOMEBREW_PREFIX="/usr/local"
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fi
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unset USR_LOCAL_BREW_FILE_DIRECTORY USR_LOCAL_HOMEBREW_REPOSITORY
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fi
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unset BREW_FILE_DIRECTORY
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# If the location of HOMEBREW_LIBRARY changes
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# keg_relocate.rb, formula_cellar_checks.rb, and test/global_spec.rb need to change.
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HOMEBREW_LIBRARY="${HOMEBREW_REPOSITORY}/Library"
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# Load Homebrew's variable configuration files from disk.
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# First, load the system-wide configuration.
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if [[ -f "/etc/homebrew/brew.env" ]]
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then
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unset SYSTEM_ENV_TAKES_PRIORITY
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# only load HOMEBREW_*=* lines
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SYSTEM_HOMEBREW_ENV="$(grep -E '^HOMEBREW_[A-Z_]+=.*$' "/etc/homebrew/brew.env")"
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if [[ -n "${HOMEBREW_SYSTEM_ENV_TAKES_PRIORITY-}" ]]
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then
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SYSTEM_ENV_TAKES_PRIORITY="1"
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else
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eval "${SYSTEM_HOMEBREW_ENV}"
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fi
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fi
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# Next, load the prefix configuration
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if [[ -f "${HOMEBREW_PREFIX}/etc/homebrew/brew.env" ]]
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then
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# only load HOMEBREW_*=* lines
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PREFIX_HOMEBREW_ENV="$(grep -E '^HOMEBREW_[A-Z_]+=.*$' "${HOMEBREW_PREFIX}/etc/homebrew/brew.env")"
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eval "${PREFIX_HOMEBREW_ENV}"
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unset PREFIX_HOMEBREW_ENV
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fi
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# Finally, load the user configuration
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if [[ -n "${XDG_CONFIG_HOME-}" ]]
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then
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HOMEBREW_USER_CONFIG_HOME="${XDG_CONFIG_HOME}/homebrew"
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elif [[ -n "${HOME-}" ]]
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then
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HOMEBREW_USER_CONFIG_HOME="${HOME}/.homebrew"
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elif [[ -n "${USER-}" ]]
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then
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if [[ "${OSTYPE}" == "darwin"* ]]
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then
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HOMEBREW_USER_CONFIG_HOME="/Users/${USER}/.homebrew"
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else
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HOMEBREW_USER_CONFIG_HOME="/home/${USER}/.homebrew"
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fi
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elif [[ -n "${LOGNAME-}" ]]
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then
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if [[ "${OSTYPE}" == "darwin"* ]]
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then
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HOMEBREW_USER_CONFIG_HOME="/Users/${LOGNAME}/.homebrew"
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else
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HOMEBREW_USER_CONFIG_HOME="/home/${LOGNAME}/.homebrew"
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fi
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else
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echo "Error: \$HOME or \$USER or \$LOGNAME must be set to run brew." >&2
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exit 1
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fi
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if [[ -f "${HOMEBREW_USER_CONFIG_HOME}/brew.env" ]]
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then
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# only load HOMEBREW_*=* lines
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USER_HOMEBREW_ENV="$(grep -E '^HOMEBREW_[A-Z_]+=.*$' "${HOMEBREW_USER_CONFIG_HOME}/brew.env")"
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eval "${USER_HOMEBREW_ENV}"
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unset USER_HOMEBREW_ENV
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fi
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# If the system configuration takes priority, load it last.
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if [[ -n "${SYSTEM_ENV_TAKES_PRIORITY-}" ]]
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then
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eval "${SYSTEM_HOMEBREW_ENV}"
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fi
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unset SYSTEM_HOMEBREW_ENV
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# Copy and export all HOMEBREW_* variables previously mentioned in
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# manpage or used elsewhere by Homebrew.
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# These variables are allowed to be set by the user as, e.g., `HOMEBREW_BROWSER`.
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MANPAGE_VARS=(
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BAT_CONFIG_PATH
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BAT_THEME
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BROWSER
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DISPLAY
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EDITOR
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NO_COLOR
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)
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for VAR in "${MANPAGE_VARS[@]}"
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do
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# Skip if variable value is empty.
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[[ -z "${!VAR:-}" ]] && continue
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VAR_NEW="HOMEBREW_${VAR}"
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# Skip if existing HOMEBREW_* variable is set.
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[[ -n "${!VAR_NEW:-}" ]] && continue
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export "${VAR_NEW}"="${!VAR}"
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done
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# We don't want to take the user's value for, e.g., `HOMEBREW_PATH` here!
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USED_BY_HOMEBREW_VARS=(
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CODESPACES
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DBUS_SESSION_BUS_ADDRESS
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PATH
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TMUX
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XDG_RUNTIME_DIR
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)
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for VAR in "${USED_BY_HOMEBREW_VARS[@]}"
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do
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# Skip if variable value is empty.
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[[ -z "${!VAR:-}" ]] && continue
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# We unconditionally override `HOMEBREW_*` here.
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VAR_NEW="HOMEBREW_${VAR}"
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export "${VAR_NEW}"="${!VAR}"
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done
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unset VAR VAR_NEW MANPAGE_VARS USED_BY_HOMEBREW_VARS
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export HOMEBREW_BREW_FILE
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export HOMEBREW_PREFIX
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export HOMEBREW_REPOSITORY
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export HOMEBREW_LIBRARY
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export HOMEBREW_USER_CONFIG_HOME
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# set from user environment
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# shellcheck disable=SC2154
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# Use VISUAL if HOMEBREW_EDITOR and EDITOR are unset.
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if [[ -z "${HOMEBREW_EDITOR:-}" && -n "${VISUAL:-}" ]]
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then
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export HOMEBREW_EDITOR="${VISUAL}"
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fi
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# set from user environment
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# shellcheck disable=SC2154
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# Set CI variable for Azure Pipelines and Jenkins
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# (Set by default on GitHub Actions, Circle and Travis CI)
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if [[ -z "${CI:-}" ]] && [[ -n "${TF_BUILD:-}" || -n "${JENKINS_HOME:-}" ]]
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then
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export CI="1"
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fi
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if [[ -n "${GITHUB_ACTIONS:-}" && -n "${ImageOS:-}" && -n "${ImageVersion:-}" ]]
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then
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export HOMEBREW_GITHUB_HOSTED_RUNNER=1
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fi
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# filter the user environment
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PATH="/usr/bin:/bin:/usr/sbin:/sbin"
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FILTERED_ENV=()
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ENV_VAR_NAMES=(
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HOME SHELL PATH TERM TERMINFO TERMINFO_DIRS COLUMNS DISPLAY LOGNAME USER CI SSH_AUTH_SOCK SUDO_ASKPASS
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http_proxy https_proxy ftp_proxy no_proxy all_proxy HTTPS_PROXY FTP_PROXY ALL_PROXY
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)
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# Filter all but the specific variables.
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for VAR in "${ENV_VAR_NAMES[@]}" "${!HOMEBREW_@}"
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do
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# Skip if variable value is empty.
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[[ -z "${!VAR:-}" ]] && continue
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FILTERED_ENV+=("${VAR}=${!VAR}")
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done
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if [[ -n "${CI:-}" ]]
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then
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for VAR in "${!GITHUB_@}"
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do
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# Skip if variable value is empty.
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[[ -z "${!VAR:-}" ]] && continue
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# Skip variables that look like tokens.
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[[ "${VAR}" = *TOKEN* ]] && continue
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FILTERED_ENV+=("${VAR}=${!VAR}")
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done
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fi
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unset VAR ENV_VAR_NAMES
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exec /usr/bin/env -i "${FILTERED_ENV[@]}" /bin/bash "${HOMEBREW_LIBRARY}/Homebrew/brew.sh" "$@"
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