Add a build script to compile modules and SDKs in AOSP.

Test: build-mainline-modules.sh
Bug: 142935992
Merged-In: I80a9bf8ce03d77705ba677f95b03aeb2ac2451d5
Change-Id: I80a9bf8ce03d77705ba677f95b03aeb2ac2451d5
(cherry picked from commit 90bc3cd304)

scripts/OWNERS

@@ -1 +1,2 @@
 per-file system-clang-format,system-clang-format-2 = enh@google.com,smoreland@google.com
+per-file build-mainline-modules.sh = ngeoffray@google.com,paulduffin@google.com,mast@google.com

scripts/build-mainline-modules.sh

@@ -0,0 +1,63 @@
+#!/bin/bash -ex
+
+# Non exhaustive list of modules where we want prebuilts. More can be added as
+# needed.
+MAINLINE_MODULES=(
+  com.android.art.debug
+  com.android.art.release
+  com.android.art.testing
+  com.android.conscrypt
+  com.android.runtime
+  com.android.tzdata
+  com.android.i18n
+)
+
+# List of SDKs and module exports we know of.
+MODULES_SDK_AND_EXPORTS=(
+  art-module-sdk
+  art-module-test-exports
+  conscrypt-module-sdk
+  conscrypt-module-test-exports
+)
+
+# We want to create apex modules for all supported architectures.
+PRODUCTS=(
+    aosp_arm
+    aosp_arm64
+    aosp_x86
+    aosp_x86_64
+)
+
+if [ ! -e "build/make/core/Makefile" ]; then
+    echo "$0 must be run from the top of the tree"
+    exit 1
+fi
+
+OUT_DIR=$(source build/envsetup.sh > /dev/null; TARGET_PRODUCT= get_build_var OUT_DIR)
+DIST_DIR=$(source build/envsetup.sh > /dev/null; TARGET_PRODUCT= get_build_var DIST_DIR)
+
+for product in "${PRODUCTS[@]}"; do
+    build/soong/soong_ui.bash --make-mode $@ \
+        TARGET_PRODUCT=${product} \
+        ${MAINLINE_MODULES[@]}
+
+    PRODUCT_OUT=$(source build/envsetup.sh > /dev/null; TARGET_PRODUCT=${product} get_build_var PRODUCT_OUT)
+    TARGET_ARCH=$(source build/envsetup.sh > /dev/null; TARGET_PRODUCT=${product} get_build_var TARGET_ARCH)
+    rm -rf ${DIST_DIR}/${TARGET_ARCH}/
+    mkdir -p ${DIST_DIR}/${TARGET_ARCH}/
+    for module in "${MAINLINE_MODULES[@]}"; do
+      cp ${PWD}/${PRODUCT_OUT}/system/apex/${module}.apex ${DIST_DIR}/${TARGET_ARCH}/
+    done
+done
+
+
+# Create multi-archs SDKs in a different out directory. The multi-arch script
+# uses soong directly and therefore needs its own directory that doesn't clash
+# with make.
+export OUT_DIR=${OUT_DIR}/aml/
+for sdk in "${MODULES_SDK_AND_EXPORTS[@]}"; do
+    build/soong/scripts/build-aml-prebuilts.sh ${sdk}
+done
+
+rm -rf ${DIST_DIR}/mainline-sdks
+cp -R ${OUT_DIR}/soong/mainline-sdks ${DIST_DIR}