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Merge pull request #779 from MikeMcQuaid/bin-brew-local-homebrew

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bin/brew: improve $HOMEBREW_REPOSITORY/bin/brew handling.
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Mike McQuaid 2016-08-24 14:42:27 +01:00 committed by GitHub
commit 8d79cf1eb6
1 changed files with 26 additions and 7 deletions
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33
bin/brew
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@ -5,24 +5,43 @@ quiet_cd() {
cd "$@" >/dev/null
}
symlink_target_directory() {
local target="$(readlink "$1")"
local target_dirname="$(dirname "$target")"
local directory="$2"
quiet_cd "$directory" && quiet_cd "$target_dirname" && pwd -P
}
BREW_FILE_DIRECTORY="$(quiet_cd "${0%/*}/" && pwd -P)"
HOMEBREW_BREW_FILE="${BREW_FILE_DIRECTORY%/}/${0##*/}"
HOMEBREW_PREFIX="${HOMEBREW_BREW_FILE%/*/*}"
[[ -n "$HOMEBREW_PREFIX" && "$HOMEBREW_PREFIX" != "$HOMEBREW_BREW_FILE" ]] \
|| HOMEBREW_PREFIX="/"
# Default to / prefix if unset or the bin/brew file.
if [[ -z "$HOMEBREW_PREFIX" || "$HOMEBREW_PREFIX" = "$HOMEBREW_BREW_FILE" ]]
then
HOMEBREW_PREFIX="/"
fi
HOMEBREW_REPOSITORY="$HOMEBREW_PREFIX"
# Resolve the bin/brew symlink to find Homebrew's repository
if [[ -L "$HOMEBREW_BREW_FILE" ]]
then
BREW_SYMLINK="$(readlink "$HOMEBREW_BREW_FILE")"
BREW_SYMLINK_DIRECTORY="$(dirname "$BREW_SYMLINK")"
BREW_FILE_DIRECTORY="$(quiet_cd "$BREW_FILE_DIRECTORY" &&
quiet_cd "$BREW_SYMLINK_DIRECTORY" && pwd -P)"
BREW_FILE_DIRECTORY="$(symlink_target_directory "$HOMEBREW_BREW_FILE" "$BREW_FILE_DIRECTORY")"
HOMEBREW_REPOSITORY="${BREW_FILE_DIRECTORY%/*}"
fi
# Try to find a /usr/local HOMEBREW_PREFIX where possible (for bottles)
if [[ -L "/usr/local/bin/brew" ]]
then
USR_LOCAL_BREW_FILE_DIRECTORY="$(symlink_target_directory "/usr/local/bin/brew" "/usr/local/bin")"
USR_LOCAL_HOMEBREW_REPOSITORY="${USR_LOCAL_BREW_FILE_DIRECTORY%/*}"
if [[ "$HOMEBREW_REPOSITORY" = "$USR_LOCAL_HOMEBREW_REPOSITORY" ]]
then
HOMEBREW_PREFIX="/usr/local"
fi
fi
HOMEBREW_LIBRARY="$HOMEBREW_REPOSITORY/Library"
source "$HOMEBREW_LIBRARY/Homebrew/brew.sh"