Add Bazel BUILD for the project.

Change-Id: I5a299d969ff96d7d2f80aadc7e8987d461d24b8f
diff --git a/update_file_lists.sh b/update_file_lists.sh
index 7202650..767b220 100755
--- a/update_file_lists.sh
+++ b/update_file_lists.sh
@@ -3,8 +3,8 @@
 # This script copies source file lists from src/Makefile.am to cmake files.
 
 get_variable_value() {
-  FILENAME=$1
-  VARNAME=$2
+  local FILENAME=$1
+  local VARNAME=$2
   awk "
     BEGIN { start = 0; }
     /^$VARNAME =/ { start = 1; }
@@ -19,6 +19,10 @@
     | LC_ALL=C sort | uniq
 }
 
+get_header_files() {
+  get_variable_value $@ | grep '\.h$'
+}
+
 get_source_files() {
   get_variable_value $@ | grep "cc$"
 }
@@ -27,10 +31,59 @@
   get_variable_value $@ | grep "pb.cc$" | sed "s/pb.cc/proto/"
 }
 
-set_variable_value() {
-  FILENAME=$1
-  VARNAME=$2
-  PREFIX=$3
+get_proto_outs() {
+  get_variable_value $@ | grep '\.pb\.'
+}
+
+sort_files() {
+  for FILE in $@; do
+    echo $FILE
+  done | LC_ALL=C sort | uniq
+}
+
+MAKEFILE=src/Makefile.am
+
+[ -f "$MAKEFILE" ] || {
+  echo "Cannot find: $MAKEFILE"
+  exit 1
+}
+
+# Extract file lists from src/Makefile.am
+GZHEADERS=$(get_variable_value $MAKEFILE GZHEADERS)
+HEADERS=$(get_variable_value $MAKEFILE nobase_include_HEADERS)
+PUBLIC_HEADERS=$(sort_files $GZHEADERS $HEADERS)
+LIBPROTOBUF_LITE_SOURCES=$(get_source_files $MAKEFILE libprotobuf_lite_la_SOURCES)
+LIBPROTOBUF_SOURCES=$(get_source_files $MAKEFILE libprotobuf_la_SOURCES)
+LIBPROTOC_SOURCES=$(get_source_files $MAKEFILE libprotoc_la_SOURCES)
+LITE_PROTOS=$(get_proto_files $MAKEFILE protoc_lite_outputs)
+LITE_PROTOS_OUTS=$(get_proto_outs $MAKEFILE protoc_lite_outputs)
+PROTOS=$(get_proto_files $MAKEFILE protoc_outputs)
+PROTOS_OUTS=$(get_proto_outs $MAKEFILE protoc_outputs)
+WKT_PROTOS=$(get_variable_value $MAKEFILE nobase_dist_proto_DATA)
+COMMON_TEST_SOURCES=$(get_source_files $MAKEFILE COMMON_TEST_SOURCES)
+TEST_SOURCES=$(get_source_files $MAKEFILE protobuf_test_SOURCES)
+LITE_TEST_SOURCES=$(get_source_files $MAKEFILE protobuf_lite_test_SOURCES)
+
+################################################################################
+# Update cmake files.
+################################################################################
+
+CMAKE_DIR=cmake
+EXTRACT_INCLUDES_BAT=cmake/extract_includes.bat.in
+[ -d "$CMAKE_DIR" ] || {
+  echo "Cannot find: $CMAKE_DIR"
+  exit 1
+}
+
+[ -f "$EXTRACT_INCLUDES_BAT" ] || {
+  echo "Cannot find: $EXTRACT_INCLUDES_BAT"
+  exit 1
+}
+
+set_cmake_value() {
+  local FILENAME=$1
+  local VARNAME=$2
+  local PREFIX=$3
   shift
   shift
   shift
@@ -55,54 +108,17 @@
   cp /tmp/$$ $FILENAME
 }
 
-sort_files() {
-  for FILE in $@; do
-    echo $FILE
-  done | LC_ALL=C sort | uniq
-}
-
-MAKEFILE=src/Makefile.am
-CMAKE_DIR=cmake
-EXTRACT_INCLUDES_BAT=cmake/extract_includes.bat.in
-
-[ -f "$MAKEFILE" ] || {
-  echo "Cannot find: $MAKEFILE"
-  exit 1
-}
-
-[ -d "$CMAKE_DIR" ] || {
-  echo "Cannot find: $CMAKE_DIR"
-  exit 1
-}
-
-[ -f "$EXTRACT_INCLUDES_BAT" ] || {
-  echo "Cannot find: $EXTRACT_INCLUDES_BAT"
-  exit 1
-}
-
-# Extract file lists from src/Makefile.am
-GZHEADERS=$(get_variable_value $MAKEFILE GZHEADERS)
-HEADERS=$(get_variable_value $MAKEFILE nobase_include_HEADERS)
-PUBLIC_HEADERS=$(sort_files $GZHEADERS $HEADERS)
-LIBPROTOBUF_LITE_SOURCES=$(get_source_files $MAKEFILE libprotobuf_lite_la_SOURCES)
-LIBPROTOBUF_SOURCES=$(get_source_files $MAKEFILE libprotobuf_la_SOURCES)
-LIBPROTOC_SOURCES=$(get_source_files $MAKEFILE libprotoc_la_SOURCES)
-LITE_PROTOS=$(get_proto_files $MAKEFILE protoc_lite_outputs)
-PROTOS=$(get_proto_files $MAKEFILE protoc_outputs)
-COMMON_TEST_SOURCES=$(get_source_files $MAKEFILE COMMON_TEST_SOURCES)
-TEST_SOURCES=$(get_source_files $MAKEFILE protobuf_test_SOURCES)
-LITE_TEST_SOURCES=$(get_source_files $MAKEFILE protobuf_lite_test_SOURCES)
 
 # Replace file lists in cmake files.
-COMMON_PREFIX="\${protobuf_source_dir}/src/"
-set_variable_value $CMAKE_DIR/libprotobuf-lite.cmake libprotobuf_lite_files $COMMON_PREFIX $LIBPROTOBUF_LITE_SOURCES
-set_variable_value $CMAKE_DIR/libprotobuf.cmake libprotobuf_files $COMMON_PREFIX $LIBPROTOBUF_SOURCES
-set_variable_value $CMAKE_DIR/libprotoc.cmake libprotoc_files $COMMON_PREFIX $LIBPROTOC_SOURCES
-set_variable_value $CMAKE_DIR/tests.cmake lite_test_protos "" $LITE_PROTOS
-set_variable_value $CMAKE_DIR/tests.cmake tests_protos "" $PROTOS
-set_variable_value $CMAKE_DIR/tests.cmake common_test_files $COMMON_PREFIX $COMMON_TEST_SOURCES
-set_variable_value $CMAKE_DIR/tests.cmake tests_files $COMMON_PREFIX $TEST_SOURCES
-set_variable_value $CMAKE_DIR/tests.cmake lite_test_files $COMMON_PREFIX $LITE_TEST_SOURCES
+CMAKE_PREFIX="\${protobuf_source_dir}/src/"
+set_cmake_value $CMAKE_DIR/libprotobuf-lite.cmake libprotobuf_lite_files $CMAKE_PREFIX $LIBPROTOBUF_LITE_SOURCES
+set_cmake_value $CMAKE_DIR/libprotobuf.cmake libprotobuf_files $CMAKE_PREFIX $LIBPROTOBUF_SOURCES
+set_cmake_value $CMAKE_DIR/libprotoc.cmake libprotoc_files $CMAKE_PREFIX $LIBPROTOC_SOURCES
+set_cmake_value $CMAKE_DIR/tests.cmake lite_test_protos "" $LITE_PROTOS
+set_cmake_value $CMAKE_DIR/tests.cmake tests_protos "" $PROTOS
+set_cmake_value $CMAKE_DIR/tests.cmake common_test_files $CMAKE_PREFIX $COMMON_TEST_SOURCES
+set_cmake_value $CMAKE_DIR/tests.cmake tests_files $CMAKE_PREFIX $TEST_SOURCES
+set_cmake_value $CMAKE_DIR/tests.cmake lite_test_files $CMAKE_PREFIX $LITE_TEST_SOURCES
 
 # Generate extract_includes.bat
 echo "mkdir include" > $EXTRACT_INCLUDES_BAT
@@ -117,3 +133,55 @@
   WINPATH=$(echo $HEADER | sed 's;/;\\;g')
   echo "copy \${PROTOBUF_SOURCE_WIN32_PATH}\\..\\src\\$WINPATH include\\$WINPATH" >> $EXTRACT_INCLUDES_BAT
 done
+
+################################################################################
+# Update bazel BUILD files.
+################################################################################
+
+BAZEL_BUILD=./BUILD
+[ -f "$BAZEL_BUILD" ] || {
+  echo "Cannot find: $BAZEL_BUILD"
+  exit 1
+}
+set_bazel_value() {
+  local FILENAME=$1
+  local VARNAME=$2
+  local PREFIX=$3
+  shift
+  shift
+  shift
+  awk -v values="$*" -v prefix="$PREFIX" "
+    BEGIN { start = 0; }
+    /# AUTOGEN\\($VARNAME\\)/ {
+      start = 1;
+      print \$0;
+      # replace \$0 with indent.
+      sub(/#.*/, \"\", \$0)
+      len = split(values, vlist, \" \");
+      for (i = 1; i <= len; ++i) {
+        printf(\"%s\\\"%s%s\\\",\n\", \$0, prefix, vlist[i]);
+      }
+      next;
+    }
+    start && /\]/ {
+      start = 0
+    }
+    !start {
+      print \$0;
+    }
+  " $FILENAME > /tmp/$$
+  cp /tmp/$$ $FILENAME
+}
+
+
+BAZEL_PREFIX="src/"
+set_bazel_value $BAZEL_BUILD protobuf_lite_srcs $BAZEL_PREFIX $LIBPROTOBUF_LITE_SOURCES
+set_bazel_value $BAZEL_BUILD protobuf_srcs $BAZEL_PREFIX $LIBPROTOBUF_SOURCES
+set_bazel_value $BAZEL_BUILD protoc_lib_srcs $BAZEL_PREFIX $LIBPROTOC_SOURCES
+set_bazel_value $BAZEL_BUILD lite_test_protos "" $LITE_PROTOS
+set_bazel_value $BAZEL_BUILD lite_test_protos_outs $BAZEL_PREFIX $LITE_PROTOS_OUTS
+set_bazel_value $BAZEL_BUILD well_known_protos "" $WKT_PROTOS
+set_bazel_value $BAZEL_BUILD test_protos "" $PROTOS
+set_bazel_value $BAZEL_BUILD test_protos_outs $BAZEL_PREFIX $PROTOS_OUTS
+set_bazel_value $BAZEL_BUILD common_test_srcs $BAZEL_PREFIX $COMMON_TEST_SOURCES
+set_bazel_value $BAZEL_BUILD test_srcs $BAZEL_PREFIX $TEST_SOURCES