#!/bin/bash -ev

set -e

## Update apt
sudo apt-get update >/dev/null 2>&1

## Install kernel headers for matching version
sudo apt-get install linux-headers-"$(uname -r)" >/dev/null 2>&1
sudo apt-get remove *llvm* *clang* *gtk* >/dev/null 2>&1
sudo apt-get --yes install clang-"${LLVM}" libclang-"${LLVM}"-dev libelf-dev \
    libfl-dev llvm-"${LLVM}"-dev libz-dev llvm-"${LLVM}" >/dev/null 2>&1

# For static builds, we need to compile the following
if [[ $STATIC == true ]]; then
    export CPPFLAGS="-P"
    export CFLAGS="-fPIC"

    BINUTILS_VERSION="2.34.90"
    ZLIB_VERSION="1.2.11"
    XZ_VERSION="5.2.5"
    NCURSES_VERSION="6.2"
    LIBXML2_SHA="41a34e1f4ffae2ce401600dbb5fe43f8fe402641"
    ELFUTILS_VERSION="0.180"

    echo "build binutils"
    date -u
    if [ ! -d binutils-2.34.90 ]; then
        curl -L -O ftp://sourceware.org/pub/binutils/snapshots/binutils-${BINUTILS_VERSION}.tar.xz
        tar xf binutils-${BINUTILS_VERSION}.tar.xz
    fi
    cd binutils-${BINUTILS_VERSION}
    if [ ! -f Makefile ]; then
        ./configure --prefix=/usr >/dev/null 2>&1
    fi
    make -j2 >/dev/null 2>&1
    sudo make install >/dev/null 2>&1
    cd ..

    echo "build zlib"
    date -u
    if [ ! -d zlib-${ZLIB_VERSION} ]; then
        curl -L -O https://zlib.net/zlib-${ZLIB_VERSION}.tar.gz
        tar xzf zlib-${ZLIB_VERSION}.tar.gz
    fi
    cd zlib-${ZLIB_VERSION}
    ./configure --prefix=/usr >/dev/null 2>&1
    make -j2 >/dev/null 2>&1
    sudo make install >/dev/null 2>&1
    cd ..

    echo "build xz"
    date -u
    if [ ! -d xz-${XZ_VERSION} ]; then
        curl -L -O https://tukaani.org/xz/xz-${XZ_VERSION}.tar.gz
        tar xzf xz-${XZ_VERSION}.tar.gz
    fi
    cd xz-${XZ_VERSION}
    if [ ! -f Makefile ]; then
        ./configure --prefix=/usr >/dev/null 2>&1
    fi
    make -j2 >/dev/null 2>&1
    sudo make install >/dev/null 2>&1
    cd ..

    echo "build ncurses"
    date -u
    if [ ! -d ncurses-${NCURSES_VERSION} ]; then
        curl -L -O ftp://ftp.invisible-island.net/ncurses/ncurses-${NCURSES_VERSION}.tar.gz
        tar xzf ncurses-${NCURSES_VERSION}.tar.gz
    fi
    cd ncurses-${NCURSES_VERSION}
    if [ ! -f Makefile ]; then
        ./configure --prefix=/usr --with-termlib >/dev/null 2>&1
    fi
    make -j2 >/dev/null 2>&1
    sudo make install >/dev/null 2>&1
    cd ..

    echo "build libxml2"
    date -u
    if [ ! -d libxml2 ]; then
        git clone https://gitlab.gnome.org/GNOME/libxml2
    fi
    cd libxml2
    git checkout ${LIBXML2_SHA}
    if [ ! -f Makefile ]; then
        autoreconf -fvi >/dev/null 2>&1
        ./configure --prefix=/usr --without-python >/dev/null 2>&1
    fi
    make -j2 >/dev/null 2>&1
    sudo make install >/dev/null 2>&1
    cd ..

    echo "build elfutils"
    date -u
    if [ ! -d elfutils-${ELFUTILS_VERSION} ]; then
        curl -L -O ftp://sourceware.org/pub/elfutils/0.180/elfutils-${ELFUTILS_VERSION}.tar.bz2
        tar xjf elfutils-${ELFUTILS_VERSION}.tar.bz2
    fi
    cd elfutils-${ELFUTILS_VERSION}
    if [ ! -f Makefile ]; then
        ./configure --prefix=/usr --disable-debuginfod >/dev/null 2>&1
    fi
    make -j2 >/dev/null 2>&1
    sudo make install >/dev/null 2>&1
    cd ..
fi

## build/install BCC
echo "build bcc"
date -u
git clone https://github.com/iovisor/bcc || true
cd bcc
git checkout master
git pull
if [[ "${BCC}" == "0.4.0" ]]; then
    git checkout remotes/origin/tag_v0.4.0
elif [[ "${BCC}" == "0.5.0" ]]; then
    git checkout remotes/origin/tag_v0.5.0
elif [[ "${BCC}" == "0.6.0" ]]; then
    git checkout remotes/origin/tag_v0.6.0
elif [[ "${BCC}" == "0.6.1" ]]; then
    git checkout remotes/origin/tag_v0.6.1
elif [[ "${BCC}" == "0.7.0" ]]; then
    git checkout remotes/origin/tag_v0.7.0
elif [[ "${BCC}" == "0.8.0" ]]; then
    git checkout remotes/origin/tag_v0.8.0
elif [[ "${BCC}" == "0.9.0" ]]; then
    git checkout remotes/origin/tag_v0.9.0
elif [[ "${BCC}" == "0.10.0" ]]; then
    git checkout remotes/origin/tag_v0.10.0
elif [[ "${BCC}" == "0.11.0" ]]; then
    git checkout 0fa419a64e71984d42f107c210d3d3f0cc82d59a
elif [[ "${BCC}" == "0.12.0" ]]; then
    git checkout 368a5b0714961953f3e3f61607fa16cb71449c1b
elif [[ "${BCC}" == "0.13.0" ]]; then
    git checkout 942227484d3207f6a42103674001ef01fb5335a0
elif [[ "${BCC}" == "0.14.0" ]]; then
    git checkout ceb458d6a07a42d8d6d3c16a3b8e387b5131d610
elif [[ "${BCC}" == "0.15.0" ]]; then
    git checkout e41f7a3be5c8114ef6a0990e50c2fbabea0e928e
elif [[ "${BCC}" == "0.16.0" ]]; then
    git checkout fecd934a9c0ff581890d218ff6c5101694e9b326
elif [[ "${BCC}" == "0.17.0" ]]; then
    git checkout ad5b82a5196b222ed2cdc738d8444e8c9546a77f
elif [[ "${BCC}" == "0.18.0" ]]; then
    git checkout b1ab869032611d9fcdaea56851cd6126cca2eba8
elif [[ "${BCC}" == "0.19.0" ]]; then
    git checkout 4c561d037e2798563c2e87edcc5a406b020a458c
elif [[ "${BCC}" == "0.20.0" ]]; then
    git checkout 14278bf1a52dd76ff66eed02cc9db7c7ec240da6
elif [[ "${BCC}" == "0.21.0" ]]; then
    git checkout 321c9c979889abce48d0844b3d539ec9a01e6f3c
elif [[ "${BCC}" == "0.22.0" ]]; then
    git checkout 44fc17fc8ca0a53f37e82aa82a6a000ec28384c4
elif [[ "${BCC}" == "0.23.0" ]]; then
    git checkout 67f59ee80fcf5deedaacba1436d9fa09d32a16a0
else
    echo "unsupported bcc version: ${BCC}"
    exit 1
fi
mkdir -p _build
cd _build
if [ ! -f Makefile ]; then
    cmake .. -DCMAKE_INSTALL_PREFIX=/usr >/dev/null 2>&1
fi
make -j2 >/dev/null 2>&1
sudo make install >/dev/null 2>&1
find . -name "*.a" -exec sudo cp -v {} /usr/lib/ \;
cd ../..

echo "prerequisite build complete"
date -u

## Build and test
if [ -n "${FEATURES}" ]; then
    if [[ $STATIC != true ]]; then
        cargo build --release --features "${FEATURES}"
        cargo test --release --features "${FEATURES}"
    else
        export RUSTFLAGS="-L /usr/lib -L /usr/lib64 -L /usr/lib/llvm-${LLVM}/lib"
    fi
    cargo run --release --features "${FEATURES}" --example smoketest
else
    if [[ $STATIC != true ]]; then
        cargo build --release
        cargo test --release
    else
        export RUSTFLAGS="-L /usr/lib -L /usr/lib64 -L /usr/lib/llvm-${LLVM}/lib"
    fi
    cargo run --release --example smoketest
fi