build_cronet.sh

#!/bin/bash
# see https://chromium.googlesource.com/chromium/src/+/master/components/cronet/build_instructions.md

CHROMIUM_SRC_ROOT=${CHROMIUM_SRC_ROOT:-/root/chromium/src}
DEPOT_TOOLS_ROOT=${DEPOT_TOOLS_ROOT:-/root/depot_tools}
export PATH="$DEPOT_TOOLS_ROOT:$PATH"
BUILD_VARIANT=${1:-release}

set -euo pipefail

cd "$(dirname "$0")" || exit 1
PATCH_DIR="$(pwd)"

# build cronet only(without java jni)
cd "$CHROMIUM_SRC_ROOT" || exit 2
# patches are generated by `git ls-files -m | xargs git cl format`, `git ls-files -m | grep -F '.gn' | xargs gn format` and `git diff --patch-with-stat`.
source $CHROMIUM_SRC_ROOT/chrome/VERSION
CHROME_VERSION=$MAJOR.$MINOR.$BUILD.$PATCH
git clean -ffd
git checkout .

patch --fuzz=0 --no-backup-if-mismatch --forward --strip=1 --reject-file=- --force <"$PATCH_DIR/0001-Envoy.patch"
# Geneva DNS evasions https://geneva.cs.umd.edu/
# updates to api.txt are also in this patch, since both it and the 0003 patch change the cronet API
patch --fuzz=0 --no-backup-if-mismatch --forward --strip=1 --reject-file=- --force <"$PATCH_DIR/0002-geneva-dns-and-api-txt.patch"

patch --fuzz=0 --no-backup-if-mismatch --forward --strip=1 --reject-file=- --force <"$PATCH_DIR/0003-Add-socks5-proxy-and-jni.patch"
patch --fuzz=0 --no-backup-if-mismatch --forward --strip=1 --reject-file=- --force <"$PATCH_DIR/0004-envoy-url-socks5-param.patch"

# enable ECH
patch --fuzz=0 --no-backup-if-mismatch --forward --strip=1 --reject-file=- --force <"$PATCH_DIR/ECH_DOH_108.patch"
# hacky STDERR logging
#patch --fuzz=0 --no-backup-if-mismatch --forward --strip=1 --reject-file=- --force <"$PATCH_DIR/scm_ECH_log.patch"

# autoninja -C out/Default chrome_public_apk
gn gen out/Cronet-Desktop
autoninja -C out/Cronet-Desktop cronet # cronet_sample

for arch in arm arm64 x86 x64; do
    # arm_use_neon = false
    out_dir="$CHROMIUM_SRC_ROOT/out/Cronet-$arch-$BUILD_VARIANT"
    if [[ -d "${out_dir}/cronet" ]]; then
        rm -r "${out_dir}/cronet"
    fi
    gn_args="--out_dir=$out_dir"
    if [[ $BUILD_VARIANT == release ]]; then
        gn_args="$gn_args --release"
    fi
    # this adds target_cpu="x86" even for x64 builds
    # it seems like the only other thing this does is exclude "arm_use_neon=false" which just generates
    # a warning on non-ARM platforms, and add target_cpu, which we do, correctly, below
    if [[ $arch == "x86" ]]; then
        gn_args="$gn_args --x86"
    fi
    # shellcheck disable=SC2086
    "$CHROMIUM_SRC_ROOT/components/cronet/tools/cr_cronet.py" gn $gn_args
    if ! grep "target_cpu = \"$arch\"" "$out_dir/args.gn"; then
        echo "target_cpu = \"$arch\"" >>"$out_dir/args.gn"
    fi
    autoninja -C "$out_dir" cronet_package
    if [[ $arch != "arm" ]]; then
        cp -a "$out_dir/cronet/libs/"* "$out_dir/../Cronet-arm-$BUILD_VARIANT/cronet/libs/"
    fi
done
# gn gen out/Cronet --args='target_os="android" target_cpu="arm"'
# autoninja -C out/Cronet -t clean

# https://gn.googlesource.com/gn/+/master/docs/cross_compiles.md
find "out/Cronet-arm-$BUILD_VARIANT/cronet/libs/" -name "libcronet.*.so" -not -name "libcronet.$CHROME_VERSION.so" -delete
ls "out/Cronet-arm-$BUILD_VARIANT/cronet/"
file "out/Cronet-arm-$BUILD_VARIANT/cronet/libs"/*/*.so

cd "$PATCH_DIR" || exit 3
CRONET_OUTPUT_DIR="$CHROMIUM_SRC_ROOT/out/Cronet-arm-$BUILD_VARIANT/cronet" bash package_aar.sh "$BUILD_VARIANT"