147 lines
4.4 KiB
Bash
Executable File
147 lines
4.4 KiB
Bash
Executable File
#!/bin/bash
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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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# Fail fast with concise message when requesting unfiltered environment.
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# This is basically odisabled so can be removed at any major release afterwards
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# and definitely if this is still here in 2023.
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if [ -n "${HOMEBREW_NO_ENV_FILTERING}" ]
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then
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echo "Error: HOMEBREW_NO_ENV_FILTERING was deprecated for over a year and has now been removed (because it breaks many things)!" >&2
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exit 1
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fi
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quiet_cd() {
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cd "$@" &>/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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fi
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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="${HOMEBREW_REPOSITORY}/Library"
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# Copy and export all HOMEBREW_* variables previously mentioned in
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# manpage or used elsewhere by Homebrew.
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for VAR in BAT_THEME BROWSER DISPLAY EDITOR NO_COLOR TMUX DBUS_SESSION_BUS_ADDRESS XDG_RUNTIME_DIR
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do
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# Skip if variable value is empty.
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[[ -z "${!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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unset VAR VAR_NEW
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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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# 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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# save the existing user path as HOMEBREW_PATH so it can be queried by
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# e.g. brew doctor later.
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HOMEBREW_PATH="${PATH}"
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export HOMEBREW_PATH
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# filter the user environment
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PATH="/usr/bin:/bin:/usr/sbin:/sbin"
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FILTERED_ENV=()
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ENV_VAR_NAMES=(
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HOME SHELL PATH TERM TERMINFO TERMINFO_DIRS COLUMNS DISPLAY LOGNAME USER CI SSH_AUTH_SOCK SUDO_ASKPASS
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http_proxy https_proxy ftp_proxy no_proxy all_proxy HTTPS_PROXY FTP_PROXY ALL_PROXY
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GITHUB_ACTIONS GITHUB_WORKSPACE GITHUB_ACTIONS_HOMEBREW_SELF_HOSTED
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GITHUB_REPOSITORY GITHUB_RUN_ID GITHUB_RUN_ATTEMPT GITHUB_SHA GITHUB_HEAD_REF GITHUB_BASE_REF GITHUB_REF
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)
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# Filter all but the specific variables.
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for VAR in "${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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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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