9c85d737ad
When creating the necessary HOMEBREW_* variables ensure that they aren't set if their value would be empty.
75 lines
2.1 KiB
Bash
Executable File
75 lines
2.1 KiB
Bash
Executable File
#!/bin/bash
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set +o posix
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quiet_cd() {
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cd "$@" >/dev/null
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}
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symlink_target_directory() {
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local target="$(readlink "$1")"
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local target_dirname="$(dirname "$target")"
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local directory="$2"
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quiet_cd "$directory" && quiet_cd "$target_dirname" && pwd -P
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}
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BREW_FILE_DIRECTORY="$(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="${BREW_FILE_DIRECTORY%/*}"
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fi
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# Try to find a /usr/local HOMEBREW_PREFIX where possible (for bottles)
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if [[ -L "/usr/local/bin/brew" ]]
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then
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USR_LOCAL_BREW_FILE_DIRECTORY="$(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 AWS_ACCESS_KEY_ID AWS_SECRET_ACCESS_KEY BINTRAY_USER BINTRAY_KEY \
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BROWSER EDITOR GIT PATH VISUAL
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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"="${!VAR}"
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done
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if [[ -n "$HOMEBREW_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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for VAR in HOME SHELL PATH TERM LOGNAME USER "${!HOMEBREW_@}"
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do
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FILTERED_ENV+=( "${VAR}=${!VAR}" )
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done
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/usr/bin/env -i "${FILTERED_ENV[@]}" /bin/bash "$HOMEBREW_LIBRARY/Homebrew/brew.sh" "$@"
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else
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source "$HOMEBREW_LIBRARY/Homebrew/brew.sh"
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fi
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