#!/bin/sh

# Slackware build script for rustup

# Copyright 2017-2018 Andrew Clemons, Wellington New Zealand
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "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 AUTHOR 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.

PRGNAM=rustup
VERSION=${VERSION:-1.15.0}
BUILD=${BUILD:-1}
TAG=${TAG:-_SBo}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i586 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac

  if [ "$ARCH" = "i586" ]; then
    if rustc -Vv | grep host | grep i686 > /dev/null ; then
      ARCH=i686
    fi
  fi
fi

CWD=$(pwd)
TMP=${TMP:-/tmp/SBo}
PKG=$TMP/package-$PRGNAM
OUTPUT=${OUTPUT:-/tmp}

if [ "$ARCH" = "i586" ]; then
  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
  CARGOTARGET="--target i586-unknown-linux-gnu"
elif [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
  CARGOTARGET="--target i686-unknown-linux-gnu"
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -fPIC"
  CARGOTARGET="--target x86_64-unknown-linux-gnu"
else
  SLKCFLAGS="-O2"
  CARGOTARGET=""
fi

set -e

rm -rf $PKG
mkdir -p $TMP $PKG $OUTPUT
cd $TMP
rm -rf $PRGNAM.rs-$VERSION
tar xvf $CWD/$PRGNAM.rs-$VERSION.tar.gz
cd $PRGNAM.rs-$VERSION

# build offline
# configuration tells cargo to use the configured directory
# for dependencies intead of downloading from crates.io
mkdir .cargo
cat << EOF >> .cargo/config
[source.crates-io]
registry = 'https://github.com/rust-lang/crates.io-index'
replace-with = 'vendored-sources'

[source.vendored-sources]
directory = '$(pwd)/vendor'
EOF

# deps and versions come from Cargo.lock
mkdir vendor
(
  cd vendor

  for dependency in adler32=1.0.3 \
                    aho-corasick=0.5.3 \
                    aho-corasick=0.6.8 \
                    ansi_term=0.11.0 \
                    arrayref=0.3.5 \
                    arrayvec=0.4.7 \
                    atty=0.2.11 \
                    backtrace-sys=0.1.24 \
                    backtrace=0.3.9 \
                    base64=0.9.3 \
                    bitflags=1.0.4 \
                    block-buffer=0.3.3 \
                    build_const=0.2.1 \
                    byte-tools=0.2.0 \
                    byteorder=1.2.6 \
                    bytes=0.4.10 \
                    cc=1.0.25 \
                    cfg-if=0.1.5 \
                    clap=2.32.0 \
                    cloudabi=0.0.3 \
                    core-foundation-sys=0.5.1 \
                    core-foundation=0.5.1 \
                    crc=1.8.1 \
                    crossbeam-deque=0.6.1 \
                    crossbeam-epoch=0.5.2 \
                    crossbeam-utils=0.5.0 \
                    curl-sys=0.4.12 \
                    curl=0.4.18 \
                    digest=0.7.6 \
                    dtoa=0.4.3 \
                    either=1.5.0 \
                    encoding_rs=0.8.10 \
                    env_proxy=0.2.0 \
                    error-chain=0.12.0 \
                    fake-simd=0.1.2 \
                    filetime=0.2.1 \
                    flate2=1.0.3 \
                    fnv=1.0.6 \
                    foreign-types-shared=0.1.1 \
                    foreign-types=0.3.2 \
                    fuchsia-zircon-sys=0.3.3 \
                    fuchsia-zircon=0.3.3 \
                    futures-cpupool=0.1.8 \
                    futures=0.1.24 \
                    gcc=0.3.54 \
                    generic-array=0.9.0 \
                    h2=0.1.12 \
                    http=0.1.13 \
                    httparse=1.3.3 \
                    hyper-tls=0.3.1 \
                    hyper=0.12.11 \
                    idna=0.1.5 \
                    indexmap=1.0.1 \
                    iovec=0.1.2 \
                    itertools=0.7.8 \
                    itoa=0.4.3 \
                    kernel32-sys=0.2.2 \
                    lazy_static=1.1.0 \
                    lazycell=1.2.0 \
                    libc=0.2.43 \
                    libflate=0.1.18 \
                    libz-sys=1.0.25 \
                    lock_api=0.1.4 \
                    log=0.3.9 \
                    log=0.4.5 \
                    lzma-sys=0.1.10 \
                    markdown=0.2.0 \
                    matches=0.1.8 \
                    memchr=0.1.11 \
                    memchr=2.1.0 \
                    memoffset=0.2.1 \
                    mime=0.3.9 \
                    mime_guess=2.0.0-alpha.6 \
                    miniz-sys=0.1.10 \
                    mio-uds=0.6.7 \
                    mio=0.6.16 \
                    miow=0.2.1 \
                    native-tls=0.2.1 \
                    net2=0.2.33 \
                    nodrop=0.1.12 \
                    num_cpus=1.8.0 \
                    ole32-sys=0.2.0 \
                    openssl-probe=0.1.2 \
                    openssl-src=111.0.1+1.1.1 \
                    openssl-sys=0.9.39 \
                    openssl=0.10.15 \
                    owning_ref=0.3.3 \
                    parking_lot=0.6.4 \
                    parking_lot_core=0.3.1 \
                    percent-encoding=1.0.1 \
                    phf=0.7.23 \
                    phf_codegen=0.7.23 \
                    phf_generator=0.7.23 \
                    phf_shared=0.7.23 \
                    pipeline=0.5.0 \
                    pkg-config=0.3.14 \
                    proc-macro2=0.4.20 \
                    quote=0.6.8 \
                    rand=0.4.3 \
                    rand=0.5.5 \
                    rand_core=0.2.2 \
                    rand_core=0.3.0 \
                    redox_syscall=0.1.40 \
                    redox_termios=0.1.1 \
                    regex-syntax=0.3.9 \
                    regex-syntax=0.6.2 \
                    regex=0.1.80 \
                    regex=1.0.5 \
                    remove_dir_all=0.5.1 \
                    reqwest=0.9.2 \
                    rustc-demangle=0.1.9 \
                    rustc_version=0.2.3 \
                    ryu=0.2.6 \
                    safemem=0.3.0 \
                    same-file=1.0.3 \
                    schannel=0.1.14 \
                    scopeguard=0.3.3 \
                    security-framework-sys=0.2.1 \
                    security-framework=0.2.1 \
                    semver-parser=0.7.0 \
                    semver=0.9.0 \
                    serde=1.0.79 \
                    serde_derive=1.0.79 \
                    serde_json=1.0.32 \
                    serde_urlencoded=0.5.3 \
                    sha2=0.7.1 \
                    siphasher=0.2.3 \
                    slab=0.4.1 \
                    smallvec=0.6.5 \
                    socket2=0.3.8 \
                    stable_deref_trait=1.1.1 \
                    string=0.1.1 \
                    strsim=0.7.0 \
                    syn=0.15.9 \
                    tar=0.4.17 \
                    tempdir=0.3.7 \
                    tempfile=3.0.4 \
                    term=0.5.1 \
                    termion=1.5.1 \
                    textwrap=0.10.0 \
                    thread-id=2.0.0 \
                    thread_local=0.2.7 \
                    thread_local=0.3.6 \
                    time=0.1.40 \
                    tokio-codec=0.1.1 \
                    tokio-current-thread=0.1.3 \
                    tokio-executor=0.1.5 \
                    tokio-fs=0.1.3 \
                    tokio-io=0.1.9 \
                    tokio-reactor=0.1.6 \
                    tokio-tcp=0.1.2 \
                    tokio-threadpool=0.1.7 \
                    tokio-timer=0.2.7 \
                    tokio-udp=0.1.2 \
                    tokio-uds=0.2.2 \
                    tokio=0.1.11 \
                    toml=0.4.8 \
                    try-lock=0.2.2 \
                    typenum=1.10.0 \
                    ucd-util=0.1.1 \
                    unicase=1.4.2 \
                    unicase=2.2.0 \
                    unicode-bidi=0.3.4 \
                    unicode-normalization=0.1.7 \
                    unicode-width=0.1.5 \
                    unicode-xid=0.1.0 \
                    unreachable=1.0.0 \
                    url=1.7.1 \
                    utf8-ranges=0.1.3 \
                    utf8-ranges=1.0.1 \
                    uuid=0.7.1 \
                    vcpkg=0.2.6 \
                    vec_map=0.8.1 \
                    version_check=0.1.5 \
                    void=1.0.2 \
                    wait-timeout=0.1.5 \
                    walkdir=2.2.5 \
                    want=0.0.6 \
                    winapi-build=0.1.1 \
                    winapi-i686-pc-windows-gnu=0.4.0 \
                    winapi-util=0.1.1 \
                    winapi-x86_64-pc-windows-gnu=0.4.0 \
                    winapi=0.2.8 \
                    winapi=0.3.6 \
                    winreg=0.5.1 \
                    ws2_32-sys=0.2.1 \
                    xattr=0.2.2 \
                    xz2=0.1.5; do
    dep="$(echo "$dependency" | cut -d= -f1)"
    ver="$(echo "$dependency" | cut -d= -f2)"

    tar xvf $CWD/$dep-$ver.crate

    touch $dep-$ver/.cargo-ok

    # generate checksum
    {
      printf "{\n"
      printf '    "files": {\n'

      (
        cd $dep-$ver
        find . -type f -print0 | xargs -0 sha256sum | sed -n '/\.cargo-checksum\.json/!p' | sed 's/\.\///;s/^\([^ ]*\)[[:space:]][[:space:]]*\(.*\)$/"\2":"\1",/'
      ) | sed '$ s/,$//'

      printf "    },\n"
      printf '    "package": "'

      sha256sum "$CWD/$dep-$ver.crate" | cut -f1 -d' ' | sed 's/$/"/'

      printf "}\n"
    } | python -c "import sys, json; data = sys.stdin.read(); print json.dumps(json.loads(data), sort_keys=True, indent=4, separators=(',', ' : '))" > $dep-$ver/.cargo-checksum.json
  done
)

chown -R root:root .
find -L . \
 \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
  -o -perm 511 \) -exec chmod 755 {} \; -o \
 \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;

cargo build --release --features no-self-update $CARGOTARGET

mkdir -p $PKG/usr/bin/

find target -name rustup-init -exec install -m 755 {} $PKG/usr/bin/rustup \;

find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true

mkdir -p $PKG/usr/share/bash-completion/completions
$PKG/usr/bin/rustup completions bash > $PKG/usr/share/bash-completion/completions/rustup

mkdir -p $PKG/usr/share/zsh/site-functions
$PKG/usr/bin/rustup completions zsh > $PKG/usr/share/zsh/site-functions/_rustup

chmod 0644 $PKG/usr/share/zsh/site-functions/_rustup $PKG/usr/share/bash-completion/completions/rustup

mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
cp -a LICENSE-APACHE LICENSE-MIT README.md $PKG/usr/doc/$PRGNAM-$VERSION
cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild

mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

cd $PKG
/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.${PKGTYPE:-tgz}