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#! /bin/bash -eu
# Run CKati step separately, tracing given Makefile variables.
# It is expected that the regular Android null build (`m nothing`)
# has been run so that $OUT_DIR/soong/Android-${TARGET_PRODUCT}.mk,
# $OUT_DIR/soong/make_vars-${TARGET_PRODUCT}.mk, etc. files exist.
#
# The output file is in JSON format and can be processed with, say,
# `jq`. For instance, the following invocation outputs all assignment
# traces concisely:
# jq -c '.assignments[] | (select (.operation == "assign")) | {("n"): .name, ("l"): .value_stack[0]?, ("v"): .value }' out/ckati.trace
# generates
# {"n":"<var1>","l":"<file>:<line>","v":"<value1>"}
# ...
function die() { format=$1; shift; printf "$format\n" $@; exit 1; }
function usage() { die "Usage: %s [-o FILE] VAR ...\n(without -o the output goes to ${outfile})" ${0##*/}; }
[[ -d build/soong ]] || die "run this script from the top of the Android source tree"
declare -r out=${OUT_DIR:-out}
[[ -x ${out}/soong_ui ]] || die "run Android build first"
: ${TARGET_PRODUCT:?not set, run lunch?}
: ${TARGET_BUILD_VARIANT:?not set, run lunch?}
declare -r androidmk=${out}/soong/Android-${TARGET_PRODUCT}.mk
declare -r makevarsmk=${out}/soong/make_vars-${TARGET_PRODUCT}.mk
declare -r target_device_dir=$(${out}/soong_ui --dumpvar-mode TARGET_DEVICE_DIR)
: ${target_device_dir:?cannot find device directory for ${TARGET_PRODUCT}}
declare -r target_device=$(${out}/soong_ui --dumpvar-mode TARGET_DEVICE)
: ${target_device:?cannot find target device for ${TARGET_PRODUCT}}
declare -r timestamp_file=${out}/build_date.txt
# Files should exist, so ls should succeed:
ls -1d "$androidmk" "$makevarsmk" "$target_device_dir" "$timestamp_file" >/dev/null
outfile=${out}/ckati.trace
while getopts "ho:" opt; do
case $opt in
h) usage ;;
o) outfile=$OPTARG ;;
?) usage ;;
esac
done
if (($#>0)); then
declare -a tracing=(--variable_assignment_trace_filter="$*" --dump_variable_assignment_trace "$outfile")
else
printf "running ckati without tracing variables\n"
fi
# Touch one input for ckati, otherwise it will just print
# 'No need to regenerate ninja file' and exit.
touch "$androidmk"
prebuilts/build-tools/linux-x86/bin/ckati \
--gen_all_targets \
-i \
--ignore_optional_include=out/%.P \
--ninja \
--ninja_dir=out \
--ninja_suffix=-${TARGET_PRODUCT} \
--no_builtin_rules \
--no_ninja_prelude \
--regen \
--top_level_phony \
--use_find_emulator \
--use_ninja_phony_output \
--use_ninja_symlink_outputs \
--werror_find_emulator \
--werror_implicit_rules \
--werror_overriding_commands \
--werror_phony_looks_real \
--werror_real_to_phony \
--werror_suffix_rules \
--werror_writable \
--writable out/ \
-f build/make/core/main.mk \
"${tracing[@]}" \
ANDROID_JAVA_HOME=prebuilts/jdk/jdk17/linux-x86 \
ASAN_SYMBOLIZER_PATH=$PWD/prebuilts/clang/host/linux-x86/llvm-binutils-stable/llvm-symbolizer \
BUILD_DATETIME_FILE="$timestamp_file" \
BUILD_HOSTNAME=$(hostname) \
BUILD_USERNAME="$USER" \
JAVA_HOME=$PWD/prebuilts/jdk/jdk17/linux-x86 \
KATI_PACKAGE_MK_DIR="{$out}/target/product/${target_device}/CONFIG/kati_packaging" \
OUT_DIR="$out" \
PATH="$PWD/prebuilts/build-tools/path/linux-x86:$PWD/${out}/.path" \
PYTHONDONTWRITEBYTECODE=1 \
SOONG_ANDROID_MK="$androidmk" \
SOONG_MAKEVARS_MK="$makevarsmk" \
TARGET_BUILD_VARIANT="$TARGET_BUILD_VARIANT" \
TARGET_DEVICE_DIR="$target_device_dir" \
TARGET_PRODUCT=${TARGET_PRODUCT} \
TMPDIR="$PWD/$out/soong/.temp"
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