113 lines
3.3 KiB
Bash
Executable File
113 lines
3.3 KiB
Bash
Executable File
#!/bin/bash
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set +o posix
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# Fail fast with concise message when cwd does not exist
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if ! [[ -d "$PWD" ]]; then
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echo "Error: The current working directory doesn't exist, cannot proceed." >&2
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exit 1
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fi
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quiet_cd() {
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cd "$@" >/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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fi
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HOMEBREW_LIBRARY="$HOMEBREW_REPOSITORY/Library"
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# Whitelist and copy to HOMEBREW_* all variables previously mentioned in
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# manpage or used elsewhere by Homebrew.
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for VAR in BROWSER DISPLAY EDITOR NO_COLOR PATH
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do
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# Skip if variable value is empty.
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[[ -z "${!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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# 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="$VISUAL"
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fi
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# Set CI variable for Azure Pipelines and Jenkins
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# (Set by default on Circle and Travis CI)
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if [[ -z "$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 [[ -z "$HOMEBREW_NO_ENV_FILTERING" ]]
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then
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PATH="/usr/bin:/bin:/usr/sbin:/sbin"
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FILTERED_ENV=()
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# Filter all but the specific variables.
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for VAR in HOME SHELL PATH TERM TERMINFO COLUMNS DISPLAY LOGNAME USER CI SSH_AUTH_SOCK SUDO_ASKPASS \
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http_proxy https_proxy ftp_proxy no_proxy all_proxy HTTPS_PROXY FTP_PROXY ALL_PROXY \
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GITHUB_ACTIONS GITHUB_ACTIONS_HOMEBREW_SELF_HOSTED \
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GITHUB_REPOSITORY GITHUB_RUN_ID GITHUB_SHA GITHUB_HEAD_REF GITHUB_BASE_REF GITHUB_REF \
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"${!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}=${!VAR}" )
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done
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exec /usr/bin/env -i "${FILTERED_ENV[@]}" /bin/bash "$HOMEBREW_LIBRARY/Homebrew/brew.sh" "$@"
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else
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# Don't need shellcheck to follow this `source`.
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# shellcheck disable=SC1090
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source "$HOMEBREW_LIBRARY/Homebrew/brew.sh"
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fi
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