GKI: build_abi.sh: copy updated symbols to DIST_DIR

This hopes to address reports that the distribution directory
doesn't contain up-to-date symbol information after running
build_abi.sh --update.

The functionality that does this is split out into the new script
copy_symbols.sh.

Bug: 191692661
Suggested-by: Matthias Maennich <[email protected]>
Change-Id: I918c64cb8845dd47a27615421aa93ac911d404ed
Signed-off-by: Giuliano Procida <[email protected]>

build.sh

@@ -844,18 +844,9 @@ fi
 
 # Copy the abi symbol list file from the sources into the dist dir
 if [ -n "${KMI_SYMBOL_LIST}" ]; then
-  echo "========================================================"
-  echo " Generating abi symbol list definition to ${ABI_SL}"
+  ${ROOT_DIR}/build/copy_symbols.sh "$ABI_SL" "$ROOT_DIR/$KERNEL_DIR" \
+    "${KMI_SYMBOL_LIST}" ${ADDITIONAL_KMI_SYMBOL_LISTS}
   pushd $ROOT_DIR/$KERNEL_DIR
-  cp "${KMI_SYMBOL_LIST}" ${ABI_SL}
-
-  # If there are additional symbol lists specified, append them
-  if [ -n "${ADDITIONAL_KMI_SYMBOL_LISTS}" ]; then
-    for symbol_list in ${ADDITIONAL_KMI_SYMBOL_LISTS}; do
-        echo >> ${ABI_SL}
-        cat "${symbol_list}" >> ${ABI_SL}
-    done
-  fi
   if [ "${TRIM_NONLISTED_KMI}" = "1" ]; then
       # Create the raw symbol list
       cat ${ABI_SL} | \

build_abi.sh

@@ -220,6 +220,11 @@ if [ -n "$KMI_SYMBOL_LIST" ]; then
             ${FULL_ABI_FLAG}                           \
             ${DIST_DIR}
 
+        # Redo what build.sh has done, with possibly fresher symbol lists.
+        ABI_SL="${DIST_DIR}/abi_symbollist"
+        ${ROOT_DIR}/build/copy_symbols.sh "$ABI_SL" "$ROOT_DIR/$KERNEL_DIR" \
+          "${KMI_SYMBOL_LIST}" ${ADDITIONAL_KMI_SYMBOL_LISTS}
+
         # In case of a simple --update-symbol-list call we can bail out early
         [ $UPDATE -eq 0 ] && exit 0
 

copy_symbols.sh

@@ -0,0 +1,42 @@
+#!/bin/bash -eu
+
+# Copyright (C) 2021 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This is an internal helper script used by build.sh and build_abi.sh
+
+# arguments are:
+#   abi_sl - the dist directory ABI symbol list
+#   kernel_dir
+#   main_symbol_list_file_name
+#   (additional_symbol_list_file_name)*
+
+abi_sl="$1"; shift
+kernel_dir="$1"; shift
+symbol_list="$1"; shift
+
+# Copy the abi symbol list file from the sources into the dist dir.
+verb=Generating
+test -e "$abi_sl" && verb=Refreshing
+echo "========================================================"
+echo " $verb abi symbol list definition in $abi_sl"
+cp -- "$kernel_dir/$symbol_list" "$abi_sl"
+
+# If there are additional symbol lists specified, append them.
+for symbol_list; do
+  echo >> "$abi_sl"
+  cat -- "$kernel_dir/$symbol_list" >> "$abi_sl"
+done
+
+exit 0