#!/bin/sh

# Copyright 2015 The Android Open Source Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

. $(dirname "$0")/utils/common.shi

shell_import utils/aosp_dir.shi
shell_import utils/emulator_prebuilts.shi
shell_import utils/install_dir.shi
shell_import utils/option_parser.shi
shell_import utils/package_list_parser.shi
shell_import utils/package_builder.shi

PROGRAM_PARAMETERS=""

PROGRAM_DESCRIPTION=\
"Build Mesa3D library dependencies if needed."

package_builder_register_options

aosp_dir_register_option
prebuilts_dir_register_option
install_dir_register_option mesa-deps

option_parse "$@"

if [ "$PARAMETER_COUNT" != 0 ]; then
    panic "This script takes no arguments. See --help for details."
fi

prebuilts_dir_parse_option
aosp_dir_parse_option
install_dir_parse_option

ARCHIVE_DIR=$PREBUILTS_DIR/archive
if [ ! -d "$ARCHIVE_DIR" ]; then
    dump "Downloading dependencies sources first."
    $(program_directory)/download-sources.sh \
        --verbosity=$(get_verbosity) \
        --prebuilts-dir="$PREBUILTS_DIR" ||
            panic "Could not download source archives!"
fi
if [ ! -d "$ARCHIVE_DIR" ]; then
    panic "Missing archive directory: $ARCHIVE_DIR"
fi
PACKAGE_LIST=$ARCHIVE_DIR/PACKAGES.TXT
if [ ! -f "$PACKAGE_LIST" ]; then
    panic "Missing package list file, run download-sources.sh: $PACKAGE_LIST"
fi

package_builder_process_options mesa-deps

package_list_parse_file "$PACKAGE_LIST"

BUILD_SRC_DIR=$TEMP_DIR/src

# Unpack package source into $BUILD_SRC_DIR if needed.
# $1: Package basename.
unpack_package_source () {
    local PKG_NAME PKG_SRC_DIR PKG_BUILD_DIR PKG_SRC_TIMESTAMP PKG_TIMESTAMP
    PKG_NAME=$(package_list_get_src_dir $1)
    PKG_SRC_TIMESTAMP=$BUILD_SRC_DIR/timestamp-$PKG_NAME
    if [ ! -f "$PKG_SRC_TIMESTAMP" ]; then
        package_list_unpack_and_patch "$1" "$ARCHIVE_DIR" "$BUILD_SRC_DIR"
        touch $PKG_SRC_TIMESTAMP
    fi
}

# $1: Package basename (e.g. 'libpthread-stubs-0.3')
# $2+: Extra configuration options.
build_package () {
    local PKG_NAME PKG_SRC_DIR PKG_BUILD_DIR PKG_SRC_TIMESTAMP PKG_TIMESTAMP
    PKG_NAME=$(package_list_get_src_dir $1)
    unpack_package_source "$1"
    shift
    PKG_SRC_DIR="$BUILD_SRC_DIR/$PKG_NAME"
    PKG_BUILD_DIR=$TEMP_DIR/build-$SYSTEM/$PKG_NAME
    PKG_TIMESTAMP=$TEMP_DIR/build-$SYSTEM/$PKG_NAME-timestamp
    if [ ! -f "$PKG_TIMESTAMP" -o -n "$OPT_FORCE" ]; then
        builder_build_autotools_package \
            "$PKG_SRC_DIR" \
            "$PKG_BUILD_DIR" \
            "$@"

        touch "$PKG_TIMESTAMP"
    fi
}

# Perform a Darwin build through ssh to a remote machine.
# $1: Darwin host name.
# $2: List of darwin target systems to build for.
do_remote_darwin_build () {
    builder_prepare_remote_darwin_build \
            "/tmp/$USER-rebuild-darwin-ssh-$$/mesa-deps-build"

    copy_directory "$ARCHIVE_DIR" "$DARWIN_PKG_DIR"/archive

    local PKG_DIR="$DARWIN_PKG_DIR"
    local REMOTE_DIR=/tmp/$DARWIN_PKG_NAME
    # Generate a script to rebuild all binaries from sources.
    # Note that the use of the '-l' flag is important to ensure
    # that this is run under a login shell. This ensures that
    # ~/.bash_profile is sourced before running the script, which
    # puts MacPorts' /opt/local/bin in the PATH properly.
    #
    # If not, the build is likely to fail with a cryptic error message
    # like "readlink: illegal option -- f"
    cat > $PKG_DIR/build.sh <<EOF
#!/bin/bash -l
PROGDIR=\$(dirname \$0)
\$PROGDIR/scripts/$(program_name) \\
    --build-dir=$REMOTE_DIR/build \\
    --host=$(spaces_to_commas "$DARWIN_SYSTEMS") \\
    --install-dir=$REMOTE_DIR/install-prefix \\
    --prebuilts-dir=$REMOTE_DIR \\
    --aosp-dir=$REMOTE_DIR/aosp \\
    $DARWIN_BUILD_FLAGS
EOF
    builder_run_remote_darwin_build

    local BINARY_DIR=$INSTALL_DIR
    run mkdir -p "$BINARY_DIR" ||
            panic "Could not create final directory: $BINARY_DIR"

    for SYSTEM in $DARWIN_SYSTEMS; do
        dump "[$SYSTEM] Retrieving remote darwin binaries"
        run scp -r "$DARWIN_SSH":$REMOTE_DIR/install-prefix/$SYSTEM \
                $BINARY_DIR/

        timestamp_set "$INSTALL_DIR/$SYSTEM" mesa-deps
    done
}

if [ -z "$OPT_FORCE" ]; then
    builder_check_all_timestamps "$INSTALL_DIR" mesa-deps
fi

if [ "$DARWIN_SSH" -a "$DARWIN_SYSTEMS" ]; then
    # Perform remote Darwin build first.
    dump "Remote mesa-deps build for: $DARWIN_SYSTEMS"
    do_remote_darwin_build "$DARWIN_SSH" "$DARWIN_SYSTEMS"
fi

for SYSTEM in $LOCAL_HOST_SYSTEMS; do
    (
        builder_enable_cxx11
        builder_prepare_for_host "$SYSTEM" "$AOSP_DIR" "$INSTALL_DIR/$SYSTEM"

        case $SYSTEM in
            linux-*)
                build_package glproto
                ;;

            windows-*)
                export LLVM_CROSS_COMPILING=1
                ;;
        esac

        case $SYSTEM in
            *-x86)
                LLVM_TARGETS=x86
                ;;
            *-x86_64)
                LLVM_TARGETS=x86_64
                ;;
            *)
                panic "Unknown system CPU architecture: $SYSTEM"
        esac

        builder_reset_configure_flags \
                --disable-shared \
                --with-pic

        build_package llvm \
                --disable-clang-arcmt \
                --disable-clang-plugin-support \
                --disable-clang-static-analyzer \
                --enable-optimized \
                --disable-assertions \
                --disable-libffi \
                --disable-docs \
                --disable-doxygen \
                --disable-timestamps \
                --enable-targets=$LLVM_TARGETS \
                --disable-bindings \

        for SUBDIR in include lib share/aclocal share/pkgconfig; do
            if [ -d "$(builder_install_prefix)/$SUBDIR" ]; then
                copy_directory \
                        "$(builder_install_prefix)/$SUBDIR" \
                        "$INSTALL_DIR/$SYSTEM/$SUBDIR"
            fi
        done

        run mkdir -p "$INSTALL_DIR/$SYSTEM/bin"
        case $SYSTEM in
            windows-*)
                # Create a dummy file to ensure that .../bin exists, since
                # the Mesa configure step will abort if it doesn't exist.
                echo "This file is required to build Mesa" > \
                        "$INSTALL_DIR/$SYSTEM/bin/DO_NOT_REMOVE"
                ;;
            *)
                # Copy llvm-config to .../bin.
                run cp -f "$(builder_install_prefix)/bin/llvm-config" \
                        "$INSTALL_DIR/$SYSTEM/bin/"
                ;;
        esac

        timestamp_set "$INSTALL_DIR/$SYSTEM" mesa-deps

    ) || panic "[$SYSTEM] Could not build Mesa dependencies!"

done

log "Done building mesa dependencies."