lineageos

#!/bin/bash -li

############################
# References:
#   - Lineage KLTE build instructions:
#     https://wiki.lineageos.org/devices/klte/build
#   - User setup for building:
#     http://android-rebuilds.beuc.net/SDK_6.0.0/
#   - Parameter expansion:
#     http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html (2.6.2)


# ARGUMENTS
INIT=0
SYNC=0
BUILD=0
FORCE_CLEAN=0

USAGE="$(basename "$0") <arg> -- Helper for lineage compilation tool

where <arg> can be :
    -c|--clean  -- Cleans the LineageOS repository folder
    i|init      -- Init lineage repo
    b|build     -- Compiles LineageOS
    s|sync      -- Syncs LineageOS repo
    all         -- shortcut for performing 'lineageos init build'
"

# Argparse
while [[ $# > 0 ]]; do
    key="$1"
    shift
    case $key in
        i|init)
            INIT=1
            ;;
        b|build)
            BUILD=1
            ;;
        all)
            INIT=1
            BUILD=1
            ;;
        s|sync)
            SYNC=1
            ;;
        -c|--clean)
            FORCE_CLEAN=1
            ;;
        -h|--help)
            echo "$USAGE"
            ;;
        *)
            echo "[ERROR] Options not found."
            echo "$USAGE"
            ;;
    esac
done

############################
# VARS
#

BASHRC=$BASE_DIR/.bashrc
LINEAGEOS_DEV_INIT=$BASE_DIR/.lineageos_dev_init
PROPRIETARY_BLOBS_BRANCH="${PROPRIETARY_BLOBS_BRANCH:-$LINEAGEOS_BRANCH}"

############################
# Functions
#

function force_clean {
    echo "[INFO] Cleaning repo ..."
    # remove everything in the repo
    rm -rf ..?* .[!.]* *
    # redo the .keep file
    mkdir -p $CCACHE_DIR
    # removing init file
    rm -f $LINEAGEOS_DEV_INIT
}

function reload_bashrc {
    PS1='foobar'
    source $BASHRC
}

function config_git {
    if [[ ! -z $GIT_USER_NAME ]]; then
        git config --global user.name "$GIT_USER_NAME";
    fi

    if [[ ! -z $GIT_USER_EMAIL ]]; then
        git config --global user.email "$GIT_USER_EMAIL";
    fi

    # if [[ (! $(git config --global --get user.name)) || (! $(git config --global --get user.email)) ]]; then
    #     echo "[WARNING] No git identity defined. Provide them as env variables (more info @ README)."
    #     echo "          As an alternative you can input them directly next ..."
    #     YN='no'
    #     while [[ $YN != 'yes' ]] ; do
    #         read -p "Git user name: " GIT_USER_NAME
    #         read -p "Git user email: " GIT_USER_EMAIL
    #         read -p "Accept the input [$GIT_USER_NAME/$GIT_USER_EMAIL] (yes/no)? " YN
    #     done
    #     sudo git config --global user.name "$GIT_USER_NAME";
    #     sudo git config --global user.email "$GIT_USER_EMAIL";
    # fi;
}

function init {
    # EVERYTHING BELOW NEEDS INIT FIRST
    if [ -s $LINEAGEOS_DEV_INIT ]; then
        echo "[INFO] Repository already initialized. Use [-c|--clean] for a clean init."
    fi
    config_git;

    echo "[INFO] Initializing repository."
    # forces yes to the anoying color output prompt
    yes | repo init -u $LINEAGEOS_REPO -b $LINEAGEOS_BRANCH

    # Update tree with the local manifest (if provided)
    if [[ ! -z $LINEAGEOS_LOCAL_MANIFEST_REPO ]]; then
        echo "[INFO] Updating Lineage with local manifest repositories."
        git clone $LINEAGEOS_LOCAL_MANIFEST_REPO .repo/local_manifests -b $LINEAGEOS_LOCAL_MANIFEST_BRANCH
    fi

    # download repo
    sync

    if [[ ! -z $PROPRIETARY_BLOBS_REPO ]]; then
        echo "[INFO] Cloning device's proprietary blobs"

        # We could possibly improve this by clever search in the device/ folder
        # but that would be too much work
        # - https://stackoverflow.com/a/18194523/1700053
        #
        # AS A USER: - if you don't want to download a whole repo, use the EXTRA_DOWNLOAD_X variables
        #            - if you have the device itself you can use EXTRA_DOWNLOADS_* var
        if [ ! -d "$PROPRIETARY_BLOBS_DIR" ]; then
            git clone -b "$PROPRIETARY_BLOBS_BRANCH" --single-branch "$PROPRIETARY_BLOBS_REPO" "$PROPRIETARY_BLOBS_DIR"
        else
            pushd $PROPRIETARY_BLOBS_DIR > /dev/null 2>&1
            git pull
            popd > /dev/null 2>&1
        fi
    fi

    echo "[INFO] Downloading extra files"
    while read -r download ; do
        if [[ ! -z $download ]]; then
            URL=$download[0]
            TARGET=$download[1]
            echo "- Downloading '${!URL}' to '${!TARGET}' ..."
            curl -#L --create-dirs -o ${!TARGET} ${!URL}
        fi
    done <<< "$(set | grep -oP '^\w*EXTRA_DOWNLOAD_\w*(?==)')"

    if [[ "$USE_CCACHE" == "1" ]]; then
        echo "[INFO] Enable caching at '$CCACHE_DIR' with $CCACHE_SIZE"
        ccache -M $CCACHE_SIZE
    fi

    echo "[INFO] Setup 'build/envsetup.sh'"
    # https://askubuntu.com/questions/650820/permission-denied-when-running-sh-file
    chmod u+x build/envsetup.sh
    shopt -s expand_aliases
    source $BASE_DIR/build/envsetup.sh
    breakfast $DEVICE_CODENAME

    echo "[INFO] Export environment setup into '$LINEAGEOS_DEV_INIT'."
    # Create own script so we user is free to modify its .bashrc
    echo "
        # expand envsetup at startup if its avalable
        if [[ -f $BASE_DIR/build/envsetup.sh ]]; then
            shopt -s expand_aliases
            source $BASE_DIR/build/envsetup.sh
        fi
    " > $LINEAGEOS_DEV_INIT
    # Add script to .bashrc
    sudo touch $BASHRC
    declare -a lines=("[[ -f $LINEAGEOS_DEV_INIT ]] && source $LINEAGEOS_DEV_INIT")
    for line in "${lines[@]}"; do
        grep -qF "$line" "$BASHRC" || echo "$line" | sudo tee --append $BASHRC
    done

    echo "[DONE] Init done."
}

function sync {
    if [[ ! -z $PRE_SYNC_SCRIPT ]]; then
        echo "[INFO] Run pre-sync script"
        source "$PRE_SYNC_SCRIPT"
    fi

    echo "[INFO] Sync repository"
    repo sync --force-sync -c -j $(nproc --all)

    if [[ ! -z $PROPRIETARY_BLOBS_REPO ]]; then
        # update mupets
        echo "[INFO] Updating device's proprietary blobs repository"
        pushd $PROPRIETARY_BLOBS_DIR > /dev/null 2>&1
        git pull
        popd > /dev/null 2>&1
    fi
}

function build {
    if [[ ! -z $PRE_BUILD_SCRIPT ]]; then
        echo "[INFO] Run pre-build script"
        source "$PRE_BUILD_SCRIPT"
    fi

    echo "[INFO] Building LineageOS ..."
    shopt -s expand_aliases
    source $BASE_DIR/build/envsetup.sh
    if [[ "$USE_CCACHE" == "1" ]]; then
        ccache -M $CCACHE_SIZE
    fi
    # starts configuration
    breakfast $DEVICE_CODENAME
    # starts building
    croot
    brunch $DEVICE_CODENAME

    if [[ ! -z $POST_BUILD_SCRIPT ]]; then
        echo "[INFO] Run post-build script"
        source "$POST_BUILD_SCRIPT"
    fi
}

############################
# Script options
#

pushd $BASE_DIR > /dev/null 2>&1

if [[ $FORCE_CLEAN == 1 ]]; then
    force_clean;
fi

if [[ $INIT == 1 ]]; then
    init;
fi

# if sync repo passes forces a lineage repo sync
if [[ $SYNC == 1 ]]; then
    sync;
fi

# if sync repo passes forces a lineage repo sync
if [[ $BUILD == 1 ]]; then
    build;
fi

popd > /dev/null 2>&1