From 177d988917a7b793914bb082a908aa74cde0c999 Mon Sep 17 00:00:00 2001
From: Xu Cheng <xucheng@me.com>
Date: Sun, 17 Jul 2016 02:07:06 +0800
Subject: [PATCH] brew.sh: make sudo-checker cross-platform

---
 Library/Homebrew/brew.sh | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/Library/Homebrew/brew.sh b/Library/Homebrew/brew.sh
index dd9e54e7e6..5596a51e12 100644
--- a/Library/Homebrew/brew.sh
+++ b/Library/Homebrew/brew.sh
@@ -195,19 +195,30 @@ then
   HOMEBREW_BASH_COMMAND="$HOMEBREW_LIBRARY/Homebrew/dev-cmd/$HOMEBREW_COMMAND.sh"
 fi
 
-if [[ "$(id -u)" = "0" && "$(/usr/bin/stat -f%u "$HOMEBREW_BREW_FILE")" != "0" ]]
-then
+check-run-command-as-root() {
   case "$HOMEBREW_COMMAND" in
-    analytics|install|reinstall|postinstall|link|pin|update|upgrade|vendor-install|create|migrate|tap|tap-pin|switch)
+      analytics|create|install|link|migrate|pin|postinstall|reinstall|switch|tap|tap-pin|\
+      update|upgrade|vendor-install)
+      ;;
+    *)
+      return
+      ;;
+  esac
+
+  [[ "$(id -u)" = 0 ]] || return
+
+  local brew_file_ls_info=($(ls -nd "$HOMEBREW_BREW_FILE"))
+  if [[ "${brew_file_ls_info[2]}" != 0 ]]
+  then
       odie <<EOS
 Cowardly refusing to 'sudo brew $HOMEBREW_COMMAND'
 You can use brew with sudo, but only if the brew executable is owned by root.
 However, this is both not recommended and completely unsupported so do so at
 your own risk.
 EOS
-      ;;
-  esac
-fi
+  fi
+}
+check-run-command-as-root
 
 # Hide shellcheck complaint:
 # shellcheck source=/dev/null