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#!/bin/bash
# This script because we support $GIT, $HOMEBREW_SVN, etc., Xcode-only and
# no Xcode/CLT configurations. Order is careful to be what the user would want.
set +o posix
quiet_safe_cd() {
cd "$1" >/dev/null || { echo "Error: failed to cd to $1" >&2; exit 1; }
}
absdir() {
quiet_safe_cd "${1%/*}/" && pwd -P
}
dirbasepath() {
local dir="$1"
local base="${2##*/}"
echo "$dir/$base"
}
realpath() {
local path="$1"
local dir
local dest
dir="$(absdir "$path")"
path="$(dirbasepath "$dir" "$path")"
while [[ -L "$path" ]]
do
dest="$(readlink "$path")"
if [[ "$dest" = "/"* ]]
then
path="$dest"
else
path="$dir/$dest"
fi
dir="$(absdir "$path")"
path="$(dirbasepath "$dir" "$path")"
done
echo "$path"
}
executable() {
local file="$1"
[[ -f "$file" && -x "$file" ]]
}
lowercase() {
echo "$1" | tr "[:upper:]" "[:lower:]"
}
safe_exec() {
local arg0="$1"
if ! executable "$arg0"
then
return
fi
# prevent fork-bombs
if [[ "$(lowercase "$arg0")" = "$SCM_FILE" || "$(realpath "$arg0")" = "$SCM_REAL" ]]
then
return
fi
if [[ "$HOMEBREW" = "print-path" ]]
then
local dir="$(quiet_safe_cd "${arg0%/*}/" && pwd)"
local path="$(dirbasepath "$dir" "$arg0")"
echo "$path"
exit
fi
exec "$@"
}
SCM_FILE="${0##*/}"
SCM_REAL="$(realpath "$0")"
SCM_DIR="$(quiet_safe_cd "${SCM_REAL%/*}/" && pwd -P)"
if [[ "$1" = --homebrew=* ]]
then
HOMEBREW="${1:11}"
shift
fi
case "$(lowercase "$SCM_FILE")" in
git)
[[ -n "$HOMEBREW_GIT" ]] && safe_exec "$(which "$HOMEBREW_GIT")" "$@"
[[ -n "$GIT" ]] && safe_exec "$(which "$GIT")" "$@"
;;
svn)
[[ -n "$HOMEBREW_SVN" ]] && safe_exec "$(which "$HOMEBREW_SVN")" "$@"
;;
esac
brew_version="$(quiet_safe_cd "$SCM_DIR/../../../../bin" && pwd -P)/$SCM_FILE"
safe_exec "$brew_version" "$@"
IFS=$'\n'
for path in $(/usr/bin/which -a "$SCM_FILE" 2>/dev/null)
do
if [[ "$path" != "/usr/bin/$SCM_FILE" ]]
then
safe_exec "$path" "$@"
fi
done
if executable "/usr/bin/xcode-select"
then
# xcode-select will return empty on no Xcode/CLT configuration.
# /usr/bin/<tool> will be a popup stub under such configuration.
# xcrun hangs if xcode-select is set to "/"
xcode_path="$(/usr/bin/xcode-select -print-path 2>/dev/null)"
[[ -n "$xcode_path" ]] || popup_stub=1
if [[ -z "$popup_stub" && "$xcode_path" != "/" ]]
then
path="$(/usr/bin/xcrun -find "$SCM_FILE" 2>/dev/null)"
safe_exec "$path" "$@"
fi
fi
path="/Applications/Xcode.app/Contents/Developer/usr/bin/$SCM_FILE"
safe_exec "$path" "$@"
path="/usr/bin/$SCM_FILE"
[[ -z "$popup_stub" ]] && safe_exec "$path" "$@"
echo "You must: brew install $SCM_FILE" >&2
exit 1
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