#!/bin/sh
set -eu

# From: https://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/eclass/multiprocessing.eclass
makeopts_jobs() {
    # This assumes the first .* will be more greedy than the second .*
    # since POSIX doesn't specify a non-greedy match (i.e. ".*?").
    local jobs=$(echo " $MAKEFLAGS " | sed -r -n \
        -e 's:.*[[:space:]](-j|--jobs[=[:space:]])[[:space:]]*([0-9]+).*:\2:p' \
        -e 's:.*[[:space:]](-j|--jobs)[[:space:]].*:999:p')
    echo ${jobs:-1}
}

version_icedtea7=2.6.19

dir_download="$PWD/download"
mkdir -p build; cd build
dir_install="$PWD/install-icedtea7"

# Prepare source
tar xf "$dir_download/icedtea-$version_icedtea7.tar.xz"
cd "icedtea-$version_icedtea7"

for part in corba.tar.bz2 hotspot.tar.bz2 jaxp.tar.bz2 jaxws.tar.bz2 jdk.tar.bz2 langtools.tar.bz2 openjdk.tar.bz2; do
    cp "$dir_download/icedtea-$version_icedtea7-$part" "$part"
done

unset JAVA_HOME BOOTDIR ALT_BOOTDIR  # openjdk-boot/hotspot/make/linux/makefiles/sa.make
export PATH="$PWD/../install-ant/bin:$PWD/../install-gcc/lib/jvm/bin:$PWD/../install-gcc/bin:$PATH"

# Configure source
./configure \
    --prefix="$dir_install" \
    --with-jdk-home="$PWD/../install-gcc/lib/jvm" \
    --with-parallel-jobs="$(makeopts_jobs)" \
    --disable-docs \
    --disable-downloading \
    --without-rhino \
    --disable-system-kerberos \
    --disable-system-pcsc \
    --disable-system-sctp

# Build and install
make
make install