patch-fileset

#!/bin/bash

set -e

base_suffix=.
source "$(dirname "$(readlink -f "$0")")/$base_suffix/.global"

dry_run_option="--dry-run"

if [ "$3" == "" ]; then
    usage "patch-fileset <patch-dex-dir> <fileset-api-level> <fileset-dir> [ <target-dir-to-create> | $dry_run_option [ <dexpatcher-option> ... ] ]"
fi

patch_dex_dir="${1%/}"
api_level="$2"
fileset_dir="${3%/}"
patched_filterset_dir="${4%/}"
global_dexpatcher_options=( "${@:5}" )

check_dir "$patch_dex_dir"
check_fileset "$fileset_dir"

if [ "$patched_filterset_dir" != "$dry_run_option" ]; then
    wet_run=true
else
    wet_run=false
fi

if $wet_run; then

    if [ "$patched_filterset_dir" == "" ]; then
        patched_filterset_dir="$(basename "$fileset_dir")__$(basename "$patch_dex_dir")"
    fi

    echo ">>> target directory: $patched_filterset_dir"
    mkdir "$patched_filterset_dir"

    cp -t "$patched_filterset_dir" "$fileset_dir"/*.{jar,apk}

    tmp_dir="$patched_filterset_dir/tmp"
    mkdir "$tmp_dir"

    #parts_dir="$tmp_dir/parts"
    #mkdir "$parts_dir"
    parts_dir="$tmp_dir"

fi

### apply patch parts

apply_patch_part() {

    local name="$1"

    echo ">>> apply patch: $name"

    local dexpatcher_options=( "${global_dexpatcher_options[@]}" --api-level "$api_level" --verbose )

    if $wet_run; then

        local part_dir="$parts_dir/$name"
        mkdir "$part_dir"

        local patched_dex_dir="$part_dir/patched-dex"
        mkdir "$patched_dex_dir"

        dexpatcher_options+=( --output "$patched_dex_dir" )

    else

        dexpatcher_options+=( --dry-run )

    fi

    if [ "$name" == "core.jar" ] || [ "$name" == "core-libart.jar" ]; then
        error "patching core jars not yet supported by these scripts"
    fi

    if [ "$name" == "framework.jar" ] && [ -f "$fileset_dir/framework2.jar" ]; then

        echo ">>> pre-lollipop multi-dex detected"

        # TODO: Check that 'framework3.jar' does not exist.

        # Force the creation of a minimum of 2 dex files.
        dexpatcher_options+=( --multi-dex-jobs 2 )
        run_dexpatcher "${dexpatcher_options[@]}" "$fileset_dir/$name" "$fileset_dir/framework2.jar" "$patch_dex_dir/${name}.dex"

        if $wet_run; then

            # TODO: Check that 'classes3.dex' does not exist.

            echo ">>> repack: framework.jar"
            zip -d "$patched_filterset_dir/framework.jar" 'classes*.dex'
            zip -0 -j "$patched_filterset_dir/framework.jar" "$patched_dex_dir/classes.dex"

            echo ">>> repack: framework2.jar"
            zip -d "$patched_filterset_dir/framework2.jar" 'classes*.dex'
            mv "$patched_dex_dir/classes.dex" "$patched_dex_dir/classes.dex.bak"
            mv "$patched_dex_dir/classes2.dex" "$patched_dex_dir/classes.dex"
            zip -0 -j "$patched_filterset_dir/framework2.jar" "$patched_dex_dir/classes.dex"
            mv "$patched_dex_dir/classes.dex" "$patched_dex_dir/classes2.dex"
            mv "$patched_dex_dir/classes.dex.bak" "$patched_dex_dir/classes.dex"

        fi

    else

        if (( "$api_level" >= 21 )); then
            dexpatcher_options+=( --multi-dex )
        fi
        run_dexpatcher "${dexpatcher_options[@]}" "$fileset_dir/$name" "$patch_dex_dir/${name}.dex"

        if $wet_run; then

            echo ">>> repack: $name"
            zip -d "$patched_filterset_dir/$name" 'classes*.dex'
            zip -0 -j "$patched_filterset_dir/$name" "$patched_dex_dir"/classes*.dex

        fi

    fi

}

for part in "$patch_dex_dir"/*.dex; do
    apply_patch_part "$(basename "${part%.dex}")"
done

if $wet_run; then
    rm -rf "$tmp_dir"
fi

echo
echo "*** patch-fileset: success"