Merge pull request #1452 from MikeMcQuaid/disable-root

brew.sh: disable running Homebrew as root.

Library/Homebrew/brew.sh

@@ -239,41 +239,21 @@ fi
 
 check-run-command-as-root() {
   [[ "$(id -u)" = 0 ]] || return
-  export HOMEBREW_NO_SANDBOX="1"
 
+  # Homebrew Cask may need `sudo` for system-wide installation.
   [[ "$HOMEBREW_COMMAND" = "cask" ]] && return
+
+  # Homebrew Services may need `sudo` for system-wide daemons.
   [[ "$HOMEBREW_COMMAND" = "services" ]] && return
+
+  # It's fine to run this as root as it's not changing anything.
   [[ "$HOMEBREW_COMMAND" = "--prefix" ]] && return
 
-  onoe <<EOS
-Running Homebrew as root is extremely dangerous. As Homebrew does not
-drop privileges on installation you are giving all build scripts full access
-to your system. As a result of the macOS sandbox not handling the root user
-correctly HOMEBREW_NO_SANDBOX has been set so the sandbox will not be used. If
-we have not merged a pull request to add privilege dropping by November 1st
-2016 running Homebrew as root will be disabled. No Homebrew maintainers plan
-to work on this functionality.
+  odie <<EOS
+Running Homebrew as root is extremely dangerous and no longer supported.
+As Homebrew does not drop privileges on installation you would be giving all
+build scripts full access to your system.
 EOS
-
-  case "$HOMEBREW_COMMAND" in
-    analytics|create|install|link|migrate|pin|postinstall|reinstall|switch|tap|\
-    tap-pin|update|upgrade|vendor-install)
-      ;;
-    *)
-      return
-      ;;
-  esac
-
-  local brew_file_ls_info=($(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
-  fi
 }
 check-run-command-as-root