#!/bin/sh
#
# Script to bootstrap Cargo on FreeBSD
# https://csperkins.org/research/misc/2015-01-02-cargo-freebsd.html
#
# Copyright (c) 2015 Colin Perkins
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# =================================================================================================
# Supporting functions and definitions

set -e

scriptdir=$(dirname "$0")
gitdir="$scriptdir/git"
builddir="$scriptdir/build"

git_fetch () {
	if [ ! -d $1 ]; then
		echo "*** git clone $2 -> $1"
		git clone --recursive $2 $1
	fi
	echo "*** git checkout $1 $3"
	(cd $1 && git fetch -p && git checkout -q $3)
}

# =================================================================================================
# Create target directory, for intermediate builds, if necessary

if [ ! -d $builddir ]; then
	echo "*** mkdir $builddir"
	mkdir -p $builddir
fi

# =================================================================================================
# Create bootstrap version of cargo

export CARGO_PKG_VERSION_MAJOR=0
export CARGO_PKG_VERSION_MINOR=2
export CARGO_PKG_VERSION_PATCH=0
export CARGO_PKG_VERSION="$CARGO_PKG_VERSION_MAJOR.$CARGO_PKG_VERSION_MINOR.$CARGO_PKG_VERSION_PATCH"

# Fetch dependencies for Cargo
#git_fetch $gitdir/libc			https://github.com/rust-lang/libc			5e20a3f
#git_fetch $gitdir/semver		https://github.com/rust-lang/semver			cb39080
#git_fetch $gitdir/regex			https://github.com/rust-lang/regex			996fce6
#git_fetch $gitdir/rustc_serialize	https://github.com/rust-lang/rustc-serialize		3691008
#git_fetch $gitdir/strsim		https://github.com/dguo/strsim-rs			0125b88
#git_fetch $gitdir/docopt		https://github.com/docopt/docopt.rs			116eca9
#git_fetch $gitdir/flate2		https://github.com/alexcrichton/flate2-rs		5a78698
#git_fetch $gitdir/glob			https://github.com/rust-lang/glob			273342a
#git_fetch $gitdir/libz_sys		https://github.com/alexcrichton/libz-sys		c8d3478
#git_fetch $gitdir/openssl		https://github.com/sfackler/rust-openssl		8a9aa0c
#git_fetch $gitdir/matches		https://github.com/SimonSapin/rust-std-candidates	1c2d089
#git_fetch $gitdir/url			https://github.com/servo/rust-url			88e4a9e
#git_fetch $gitdir/log			https://github.com/rust-lang/log			origin/master
#git_fetch $gitdir/curl			https://github.com/carllerche/curl-rust			88d4fdc
#git_fetch $gitdir/tar			https://github.com/alexcrichton/tar-rs			1713f63
#git_fetch $gitdir/bitflags		https://github.com/rust-lang/bitflags			origin/master
#git_fetch $gitdir/ssh2			https://github.com/alexcrichton/ssh2-rs			d8a78b3
#git_fetch $gitdir/git2			https://github.com/alexcrichton/git2-rs			3a5f0b5
#git_fetch $gitdir/gcc			https://github.com/alexcrichton/gcc-rs			b8da3f5
#git_fetch $gitdir/toml			https://github.com/alexcrichton/toml-rs			6713224
#git_fetch $gitdir/pkg_config		https://github.com/alexcrichton/pkg-config-rs		9bcae51
#git_fetch $gitdir/num_cpus		https://github.com/seanmonstar/num_cpus			origin/master
#git_fetch $gitdir/threadpool		https://github.com/rust-lang/threadpool			origin/master
#git_fetch $gitdir/time			https://github.com/rust-lang/time			origin/master
#git_fetch $gitdir/term			https://github.com/rust-lang/term			origin/master
#git_fetch $gitdir/cargo			https://github.com/rust-lang/cargo.git			$CARGO_PKG_VERSION

# Build non-Rust dependencies for Cargo
RUSTC=rustc
cargolib=$builddir/lib
cargobin=$builddir/bin

mkdir -p "$cargolib"
mkdir -p "$cargobin"

#echo "*** Build libgit2"
#mkdir -p  $gitdir/git2/libgit2-sys/libgit2/build
#(prefix=$(realpath "$builddir") && \
#	cd $gitdir/git2/libgit2-sys/libgit2/build && \
#	cmake .. -DCMAKE_INSTALL_PREFIX=$prefix -DBUILD_SHARED_LIBS=ON && \
#	make -j8 && make install)

#echo "*** Build libminiz"
#clang -c $gitdir/flate2/miniz-sys/miniz.c -o $cargolib/miniz.o
#ar -rc $cargolib/libminiz.a $cargolib/miniz.o
#ranlib $cargolib/libminiz.a
#rm $cargolib/miniz.o

# Build Rust dependencies for Cargo
#echo "*** Build libc"		&& $RUSTC $gitdir/libc/rust/src/liblibc/lib.rs		--crate-type lib --crate-name libc		--out-dir $cargolib -L $cargolib --cfg feature=\"cargo-build\"
#echo "*** Build semver"		&& $RUSTC $gitdir/semver/src/lib.rs			--crate-type lib --crate-name semver		--out-dir $cargolib -L $cargolib
#echo "*** Build regex"		&& $RUSTC $gitdir/regex/src/lib.rs			--crate-type lib --crate-name regex		--out-dir $cargolib -L $cargolib
#echo "*** Build rustc_serialize"&& $RUSTC $gitdir/rustc_serialize/src/lib.rs		--crate-type lib --crate-name rustc_serialize	--out-dir $cargolib -L $cargolib
#echo "*** Build strsim"		&& $RUSTC $gitdir/strsim/src/lib.rs			--crate-type lib --crate-name strsim		--out-dir $cargolib -L $cargolib
#echo "*** Build docopt"		&& $RUSTC $gitdir/docopt/src/lib.rs			--crate-type lib --crate-name docopt		--out-dir $cargolib -L $cargolib
#echo "*** Build gcc"		&& $RUSTC $gitdir/gcc/src/lib.rs			--crate-type lib --crate-name gcc		--out-dir $cargolib -L $cargolib
#echo "*** Build miniz_sys"	&& $RUSTC $gitdir/flate2/miniz-sys/lib.rs		--crate-type lib --crate-name miniz_sys		--out-dir $cargolib -L $cargolib --extern libc=$cargolib/liblibc.rlib -l miniz
#echo "*** Build flate2"		&& $RUSTC $gitdir/flate2/src/lib.rs			--crate-type lib --crate-name flate2		--out-dir $cargolib -L $cargolib --extern libc=$cargolib/liblibc.rlib --extern gcc=$cargolib/libgcc.rlib
#echo "*** Build glob"		&& $RUSTC $gitdir/glob/src/lib.rs			--crate-type lib --crate-name glob		--out-dir $cargolib -L $cargolib
#echo "*** Build libz_sys"	&& $RUSTC $gitdir/libz_sys/src/lib.rs			--crate-type lib --crate-name libz_sys		--out-dir $cargolib -L $cargolib --extern libc=$cargolib/liblibc.rlib
#echo "*** Build bitflags"	&& $RUSTC $gitdir/bitflags/src/lib.rs			--crate-type lib --crate-name bitflags		--out-dir $cargolib -L $cargolib
#echo "*** Build openssl_sys"	&& $RUSTC $gitdir/openssl/openssl-sys/src/lib.rs	--crate-type lib --crate-name openssl_sys	--out-dir $cargolib -L $cargolib --extern libc=$cargolib/liblibc.rlib
#echo "*** Build matches"	&& $RUSTC $gitdir/matches/matches/lib.rs		--crate-type lib --crate-name matches		--out-dir $cargolib -L $cargolib
#echo "*** Build url"		&& $RUSTC $gitdir/url/src/lib.rs			--crate-type lib --crate-name url		--out-dir $cargolib -L $cargolib
#echo "*** Build log"		&& $RUSTC $gitdir/log/src/lib.rs			--crate-type lib --crate-name log		--out-dir $cargolib -L $cargolib --extern libc=$cargolib/liblibc.rlib
#echo "*** Build env_logger"	&& $RUSTC $gitdir/log/env/src/lib.rs			--crate-type lib --crate-name env_logger	--out-dir $cargolib -L $cargolib --extern libc=$cargolib/liblibc.rlib --extern log=$cargolib/liblog.rlib
#echo "*** Build curl_sys"	&& $RUSTC $gitdir/curl/curl-sys/lib.rs			--crate-type lib --crate-name curl_sys		--out-dir $cargolib -L $cargolib --extern libc=$cargolib/liblibc.rlib
#echo "*** Build curl"           && $RUSTC $gitdir/curl/src/lib.rs			--crate-type lib --crate-name curl		--out-dir $cargolib -L $cargolib --extern libc=$cargolib/liblibc.rlib --extern url=$cargolib/liburl.rlib --extern log=$cargolib/liblog.rlib
#echo "*** Build tar"		&& $RUSTC $gitdir/tar/src/lib.rs			--crate-type lib --crate-name tar		--out-dir $cargolib -L $cargolib
#echo "*** Build libssh2_sys"	&& $RUSTC $gitdir/ssh2/libssh2-sys/lib.rs		--crate-type lib --crate-name libssh2_sys	--out-dir $cargolib -L $cargolib --extern libc=$cargolib/liblibc.rlib
#echo "*** Build ssh2"		&& $RUSTC $gitdir/ssh2/src/lib.rs			--crate-type lib --crate-name ssh2		--out-dir $cargolib -L $cargolib --extern libc=$cargolib/liblibc.rlib
#echo "*** Build libgit2_sys"	&& $RUSTC $gitdir/git2/libgit2-sys/lib.rs		--crate-type lib --crate-name libgit2_sys	--out-dir $cargolib -L $cargolib --extern libc=$cargolib/liblibc.rlib
#echo "*** Build git2"		&& $RUSTC $gitdir/git2/src/lib.rs			--crate-type lib --crate-name git2		--out-dir $cargolib -L $cargolib --extern libc=$cargolib/liblibc.rlib --extern url=$cargolib/liburl.rlib
#echo "*** Build git2_curl"	&& $RUSTC $gitdir/git2/git2-curl/src/lib.rs		--crate-type lib --crate-name git2_curl		--out-dir $cargolib -L $cargolib --extern libc=$cargolib/liblibc.rlib --extern log=$cargolib/liblog.rlib
#echo "*** Build toml"		&& $RUSTC $gitdir/toml/src/lib.rs			--crate-type lib --crate-name toml		--out-dir $cargolib -L $cargolib --cfg feature=\"rustc-serialize\"
#echo "*** Build pkg_config"	&& $RUSTC $gitdir/pkg_config/src/lib.rs			--crate-type lib --crate-name pkg_config	--out-dir $cargolib -L $cargolib
#echo "*** Build num_cpus"	&& $RUSTC $gitdir/num_cpus/src/lib.rs			--crate-type lib --crate-name num_cpus		--out-dir $cargolib -L $cargolib --extern libc=$cargolib/liblibc.rlib
#echo "*** Build threadpool"	&& $RUSTC $gitdir/threadpool/src/lib.rs			--crate-type lib --crate-name threadpool	--out-dir $cargolib -L $cargolib
#echo "*** Build time"		&& $RUSTC $gitdir/time/src/lib.rs			--crate-type lib --crate-name time		--out-dir $cargolib -L $cargolib --extern libc=$cargolib/liblibc.rlib
#echo "*** Build term"		&& $RUSTC $gitdir/term/src/lib.rs			--crate-type lib --crate-name term		--out-dir $cargolib -L $cargolib --extern libc=$cargolib/liblibc.rlib

# Build Cargo
#echo "*** Build cargo/registry"	&& $RUSTC $gitdir/cargo/src/registry/lib.rs		--crate-type lib --crate-name registry		--out-dir $cargolib -L $cargolib
#echo "*** Build cargo (lib)"	&& $RUSTC $gitdir/cargo/src/cargo/lib.rs		--crate-type lib --crate-name cargo		--out-dir $cargolib -L $cargolib --extern glob=$cargolib/libglob.rlib --extern semver=$cargolib/libsemver.rlib --extern log=$cargolib/liblog.rlib --extern term=$cargolib/libterm.rlib

libs='-l ssl -lcrypto -lz -lgit2'
for lib in curl flate ssh2; do
	libs="$libs -l$lib"
	if test -f /usr/local/lib/lib$lib.so; then
		test -f $cargolib/lib$lib.so || ln -s /usr/local/lib/lib$lib.so $cargolib
	elif test -f /usr/local/lib/lib$lib.a; then
		test -f $cargolib/lib$lib.a || ln -s /usr/local/lib/lib$lib.a $cargolib
	fi
done

#echo "*** Build cargo (bin)"	&& $RUSTC $gitdir/cargo/src/bin/cargo.rs -L $cargolib --out-dir $cargobin $libs --extern log=$cargolib/liblog.rlib

echo "$(LD_LIBRARY_PATH=$cargolib $cargobin/cargo -V) bootstrapped successfully"

# Create snapshot archive.
instdir="$scriptdir/cargo-nightly-x86_64-unknown-freebsd"
mkdir -p "$instdir/cargo/bin" "$instdir/cargo/lib"

install -m 755 $cargobin/cargo $instdir/cargo/bin
cp -a $cargolib/libgit2.so* $instdir/cargo/lib

(cd $(dirname "$instdir") && tar -cvf - $(basename "$instdir") | gzip > $(basename "$instdir").tar.gz)