Polymer: make reproduce.sh re-entrant

third_party/polymer/v1_0/reproduce.sh

 #!/bin/bash
 
 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # Reproduces the content of 'components' and 'components-chromium' using the
 # list of dependencies from 'bower.json'. Downloads needed packages and makes
 # Chromium specific modifications. To launch the script you need 'bower' and
 # 'crisper' installed on your system.
 
 set -e
 
 cd "$(dirname "$0")"
 
-rm -rf components components-chromium
+rm -rf components
 rm -rf ../../web-animations-js/sources
 
 bower install --no-color
 
 rm components/*/.travis.yml
 
 mv components/web-animations-js ../../web-animations-js/sources
 cp ../../web-animations-js/sources/COPYING ../../web-animations-js/LICENSE
 
 # Remove source mapping directives since we don't compile the maps.
@@ skipping 24 matching lines @@
 
 # Resolve a unicode encoding issue in dom-innerHTML.html.
 NBSP=$(python -c 'print u"\u00A0".encode("utf-8")')
 sed -i 's/['"$NBSP"']/\\u00A0/g' components/polymer/polymer-mini.html
 
 ./extract_inline_scripts.sh components components-chromium
 
 # Remove import of external resource in font-roboto (fonts.googleapis.com)
 # and apply additional chrome specific patches. NOTE: Where possible create
 # a Polymer issue and/or pull request to minimize these patches.
-patch -p1 < chromium.patch
+patch -p1 --forward -r - < chromium.patch
 
 new=$(git status --porcelain components-chromium | grep '^??' | \
       cut -d' ' -f2 | egrep '\.(html|js|css)$' || true)
 
 if [[ ! -z "${new}" ]]; then
   echo
   echo 'These files appear to have been added:'
   echo "${new}" | sed 's/^/  /'
 fi
 
 deleted=$(git status --porcelain components-chromium | grep '^.D' | \
           sed 's/^.//' | cut -d' ' -f2 | egrep '\.(html|js|css)$' || true)
 
 if [[ ! -z "${deleted}" ]]; then
   echo
   echo 'These files appear to have been removed:'
   echo "${deleted}" | sed 's/^/  /'
 fi
 
 if [[ ! -z "${new}${deleted}" ]]; then
   echo
 fi
 
 python create_components_summary.py > components_summary.txt