Added a function to update chroot sudoers automatically.

common.sh

 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Common constants for build scripts
 # This must evaluate properly for both /bin/bash and /bin/sh
 
 # All scripts should die on error unless commands are specifically excepted
 # by prefixing with '!' or surrounded by 'set +e' / 'set -e'.
 # TODO: Re-enable this once shflags is less prone to dying.
@@ skipping 442 matching lines @@
 start_time=$(date +%s)
 
 # Print time elsapsed since start_time.
 print_time_elapsed() {
   end_time=$(date +%s)
   elapsed_seconds="$(( $end_time - $start_time ))"
   minutes="$(( $elapsed_seconds / 60 ))"
   seconds="$(( $elapsed_seconds % 60 ))"
   echo "Elapsed time: ${minutes}m${seconds}s"
 }
+
+# This function is a place to put code to incrementally update the
+# chroot so that users don't need to fully re-make it.  It should
+# be called from scripts that are run _outside_ the chroot.
+#
+# Please put date information so it's easy to keep track of when
+# old hacks can be retired and so that people can detect when a
+# hack triggered when it shouldn't have.
+#
+# ${1} specifies the location of the chroot.
+chroot_hacks_from_outside() {
+  # Give args better names.

[davidjames, 2010/10/19 21:24:23]

No need for this comment.

+  local chroot_dir="${1}"
+
+  # Add root as a sudoer if not already done.
+  if ! sudo grep -q '^root ALL=(ALL) ALL$' "${chroot_dir}/etc/sudoers" ; then
+    info "Upgrading old chroot (pre 2010-10-19) - adding root to sudoers"
+    sudo bash -c "echo root ALL=\(ALL\) ALL >> \"${chroot_dir}/etc/sudoers\""
+  fi
+}