Get Polymer externs from closure/github (instead of Polymer/bower)

third_party/closure_compiler/roll_closure_compiler

 #!/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.
 #
 # Download the newest version of Closure Compiler, build it and put into Chrome
 # source tree. Also update externs/chrome_extensions.js.
 
 readonly SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 readonly TEMP_DIR=$(mktemp -d)
 
 readonly COMPILER_PATH="${SCRIPT_DIR}/compiler/compiler.jar"
-readonly EXTERNS_PATH="${SCRIPT_DIR}/externs/chrome_extensions.js"
+readonly EXTERNS_DIR="${SCRIPT_DIR}/externs"
 
 readonly README="${SCRIPT_DIR}/README.chromium"
 
 cleanup() {
   rm -rf "${TEMP_DIR}"
 }
 
-get_externs_sha1() {
-  sha1sum "${EXTERNS_PATH}" | cut -d' ' -f1
+get_sha1() {
+  sha1sum "$1" | cut -d" " -f1
 }
 
 trap cleanup SIGINT SIGHUP SIGTERM
 
-old_head=$(egrep -o '^Revision: [0-9a-f]{5,40}$' "${README}" | cut -d' ' -f2)
-old_externs_sha1=$(get_externs_sha1)
+old_head=$(egrep -o "^Revision: [0-9a-f]{5,40}$" "${README}" | cut -d" " -f2)
+old_extensions_sha1=$(get_sha1 "${EXTERNS_DIR}/chrome_extensions.js")
+old_polymer_sha1=$(get_sha1 "${EXTERNS_DIR}/polymer-1.0.js")
 
 cd "${TEMP_DIR}"
 
 echo "Cloning Closure Compiler repo"
 git clone --depth 1 https://github.com/google/closure-compiler.git
 
 cd closure-compiler
 
 new_head=$(git rev-parse HEAD)
 
@@ skipping 21 matching lines @@
 cp build/compiler.jar "${COMPILER_PATH}"
 
 echo "Re-building runner.jar"
 "${SCRIPT_DIR}/runner/build_runner_jar.py"
 if [[ "$?" -ne 0 ]]; then
   echo "Failed to build runner.jar, roll unsuccessful"
   cleanup
   exit 1
 fi
 
-(cat <<EOT && cat contrib/externs/chrome_extensions.js) > "${EXTERNS_PATH}"
+readonly WARNING="$(cat <<EOT
 //    SSSSSSSSSSSSSSS TTTTTTTTTTTTTTTTTTTTTTT     OOOOOOOOO     PPPPPPPPPPPPPPPPP
 //  SS:::::::::::::::ST:::::::::::::::::::::T   OO:::::::::OO   P::::::::::::::::P
 // S:::::SSSSSS::::::ST:::::::::::::::::::::T OO:::::::::::::OO P::::::PPPPPP:::::P
 // S:::::S     SSSSSSST:::::TT:::::::TT:::::TO:::::::OOO:::::::OPP:::::P     P:::::P
 // S:::::S            TTTTTT  T:::::T  TTTTTTO::::::O   O::::::O  P::::P     P:::::P
 // S:::::S                    T:::::T        O:::::O     O:::::O  P::::P     P:::::P
 //  S::::SSSS                                                     P::::PPPPPP:::::P
 //   SS::::::SSSSS       This file is generated. To update it,    P:::::::::::::PP
 //     SSS::::::::SS          run roll_closure_compiler.          P::::PPPPPPPPP
 //        SSSSSS::::S                                             P::::P
 //             S:::::S        T:::::T        O:::::O     O:::::O  P::::P
 //             S:::::S        T:::::T        O::::::O   O::::::O  P::::P
 // SSSSSSS     S:::::S      TT:::::::TT      O:::::::OOO:::::::OPP::::::PP
 // S::::::SSSSSS:::::S      T:::::::::T       OO:::::::::::::OO P::::::::P
 // S:::::::::::::::SS       T:::::::::T         OO:::::::::OO   P::::::::P
 //  SSSSSSSSSSSSSSS         TTTTTTTTTTT           OOOOOOOOO     PPPPPPPPPP
 EOT
+)"
 
-new_externs_sha1=$(get_externs_sha1)
+(echo "${WARNING}" && cat contrib/externs/chrome_extensions.js) > "${EXTERNS_DIR}/chrome_extensions.js"
+(echo "${WARNING}" && cat contrib/externs/polymer-1.0.js) > "${EXTERNS_DIR}/polymer-1.0.js"
 
-if [[ "${new_externs_sha1}" != "${old_externs_sha1}" ]]; then
-  externs_range="chrome_extensions.js: ${old_externs_sha1} -> ${new_externs_sha1}"
+new_extensions_sha1=$(get_sha1 "${EXTERNS_DIR}/chrome_extensions.js")
+if [[ "${new_extensions_sha1}" != "${old_extensions_sha1}" ]]; then
+  extensions_range="chrome_extensions.js: ${old_extensions_sha1} -> ${new_extensions_sha1}"
+fi
+
+new_polymer_sha1=$(get_sha1 "${EXTERNS_DIR}/polymer-1.0.js")
+if [[ "${new_polymer_sha1}" != "${old_polymer_sha1}" ]]; then
+  polymer_range="polymer-1.0.js: ${old_polymer_sha1} -> ${new_polymer_sha1}"
 fi
 
 echo
 echo "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"
 echo "@"
 echo "@  ROLL RESULTS:"
 echo "@"
 echo "@  closure-compiler.git HEAD:"
 echo "@    Old: ${old_head}"
 echo "@    New: ${new_head}"
 echo "@"
-echo "@  Externs SHA1:"
-echo "@    Old: ${old_externs_sha1}"
-echo "@    New: ${new_externs_sha1}"
+echo "@  externs/chrome_extensions.js SHA1:"
+echo "@    Old: ${old_extensions_sha1}"
+echo "@    New: ${new_extensions_sha1}"
+echo "@"
+echo "@  externs/polymer-1.0.js SHA1:"
+echo "@    Old: ${old_polymer_sha1}"
+echo "@    New: ${new_polymer_sha1}"
 echo "@"
 echo "@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@"
 echo
 
 sed -i "s/^Revision: ${old_head}$/Revision: ${new_head}/" "${README}"
 
 echo "git commit -a -m 'Roll closure compiler"
 echo
 echo "${head_range}"
-if [[ ! -z "${externs_range}" ]]; then echo "${externs_range}"; fi
+if [[ ! -z "${extensions_range}" ]]; then echo "${extensions_range}"; fi
+if [[ ! -z "${polymer_range}" ]]; then echo "${polymer_range}"; fi
 echo
 echo "TBR="
 echo "BUG='"
 echo
 echo "git cl upload"
 
 cleanup