This starts to fix the scripts so that they load from /usr/lib/crosutils

cros_mark_branch_as_stable

 #!/bin/bash
 
 # 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.
 
 # Mark all ebuilds in chromiumos-overlay and chromeos-overlay as stable and
 # point them at the current version we have checked out.
 #
 # This is useful in case we want to verify that all ebuilds are pointing at the
 # right commit hash when we are doing a build on a branch. It is intended to be
 # used prior to tagging and can be used instead of a preflight queue. It is an
 # alternative to cros_mark_all_as_stable that does not require a chroot and
 # does not increase the revision number on ebuilds.
 #
 # Unlike cros_mark_all_as_stable, which only updates the latest stable ebuild
 # for a given board, this script updates all stable ebuilds for all boards,
 # including unused stable ebuilds. We do this for the sake of simplicity
 # because it's hard to know in advance which ebuilds are truly unused, and it
 # shouldn't hurt to update unused ebuilds.
 #
 # This script does not support cros_mark_as_stable_blacklist. If there are any
 # packages in the blacklist, this script exits with an error message.
 #
 # Long term, the plan is to get rid of this script and replace it with
 # cros_mark_all_as_stable. This script is only present to help with branching.
 #
 # Example usage: ./cros_mark_branch_as_stable
 
-# Load common constants.  This should be the first executable line.
-# The path to common.sh should be relative to your script's location.
-. "$(dirname "$0")/common.sh"
+# --- BEGIN COMMON.SH BOILERPLATE ---
+# Load common CrOS utilities.  Inside the chroot this file is installed in
+# /usr/lib/crosutils.  Outside the chroot we find it relative to the script's
+# location.
+find_common_sh() {
+  local common_paths=(/usr/lib/crosutils $(dirname "$(readlink -f "$0")"))
+  local path
+
+  SCRIPT_ROOT=
+  for path in "${common_paths[@]}"; do
+    if [ -r "${path}/common.sh" ]; then
+      SCRIPT_ROOT=${path}
+      break
+    fi
+  done
+}
+
+find_common_sh
+. "${SCRIPT_ROOT}/common.sh" || (echo "Unable to load common.sh" && exit 1)
+# --- END COMMON.SH BOILERPLATE ---
 
 function is_workon() { xargs grep -lE '^inherit.*cros-workon'; }
 function is_stable() { xargs grep -lE '^KEYWORDS=[^~]*$'; }
 function is_unstable() { xargs grep -lE '^KEYWORDS=.*~'; }
 
 function get_workon_commit() {
   # Get the latest workon commit associated with an ebuild.
   ebuild="$1"
-  dir=$(dirname $ebuild)
-  CATEGORY=$(basename $(dirname "$dir"))
+  dir=$(dirname "$ebuild")
+  CATEGORY=$(basename "$(dirname "$dir")")
   CROS_WORKON_LOCALNAME=$(basename "$dir")
   CROS_WORKON_SUBDIR=
 
   # Grab the code from the ebuild that initializes the CROS_WORKON_*
   # variables, and eval it. Note that this only works if the variables are at
   # the start of the line (i.e. it doesn't work for "if" statements).
   eval $(grep -E '^CROS_WORKON' $ebuild)
 
   SUFFIX="$CROS_WORKON_LOCALNAME/$CROS_WORKON_SUBDIR"
   if [[ "$CATEGORY" = "chromeos-base" ]]; then
     SRCDIR="$GCLIENT_ROOT/src/platform/$SUFFIX"
   else
     SRCDIR="$GCLIENT_ROOT/src/third_party/$SUFFIX"
   fi
 
   # TODO(anush): This hack is only necessary because the kernel ebuild has "if"
   # statements, so we can't grab the CROS_WORKON_LOCALNAME properly. We should
   # clean up the kernel ebuild and remove this hack.
   if ! [[ -d "$SRCDIR" ]] && [[ "$CROS_WORKON_LOCALNAME" = "kernel" ]]; then
     SRCDIR="$GCLIENT_ROOT/src/third_party/kernel/files"
   fi
 
   cd $SRCDIR && git rev-parse HEAD
 }
 
-BLACKLIST_FILE=$(dirname "$0")/cros_mark_as_stable_blacklist
+BLACKLIST_FILE="${SCRIPTS_DIR}/cros_mark_as_stable_blacklist"
 BLACKLIST=$(cat "$BLACKLIST_FILE")
 if [[ -n "$BLACKLIST" ]]; then
   die "$0 does not support cros_mark_as_stable_blacklist"
 fi
 
 for overlay in "$GCLIENT_ROOT/src/private-overlays/chromeos-overlay" \
                "$GCLIENT_ROOT/src/third_party/chromiumos-overlay"; do
   if [[ -d "$overlay" ]]; then
     ebuilds=$(find "$overlay" -type f -name "*.ebuild" | is_workon | is_stable)
     for ebuild in $ebuilds; do
@@ skipping 10 matching lines @@
         sed -i -e "/^CROS_WORKON_COMMIT/s|=.*|=\"$COMMIT\"|" "$ebuild"
       fi
       if [[ -z "$COMMIT" ]]; then
         die "No commit hash for $ebuild"
       fi
     done
   fi
 done
 
 echo Updated all ebuilds