#!/bin/sh
set -x -e

CWD=$(pwd)

PRGNAM=$(basename $CWD)
ARCH=$(uname -m)
BUILD=5

TAG=cyco
OUTPUT=/tmp
TMP=/tmp/$TAG
PKG=$TMP/pkg-$PRGNAM
PREFIX=/usr

LATEST_RELEASE_URL=$(curl -s https://api.github.com/repos/crystal-lang/crystal/releases | grep browser_download_url | grep linux-${ARCH} | head -n 1 | cut -d '"' -f 4)
VERSION=$(echo $LATEST_RELEASE_URL | grep -o "/crystal-[0-9.-]*-" | sed "s|/crystal-\([0-9.-]*\)-|\1|g")
CLEAN_VERSION=$(echo $VERSION | tr '-' '_')

# cleaning
rm -fr $PKG

# download
[ ! -e $CWD/crystal-${VERSION}-linux-${ARCH}.tar.gz ] && wget -c https://github.com/manastech/crystal/releases/download/$(echo $VERSION | grep -o "[0-9.]*" | head -n1)/crystal-${VERSION}-linux-${ARCH}.tar.gz -O $CWD/crystal-${VERSION}-linux-${ARCH}.tar.gz

[ ! -e $CWD/completion.zsh ] && wget -c https://raw.githubusercontent.com/crystal-lang/crystal/master/etc/completion.zsh -O $CWD/completion.zsh

# installation
mkdir -p $PKG
cd $PKG
tar xvf $CWD/crystal-${VERSION}-linux-${ARCH}.tar.gz
mv crystal-$VERSION $PKG$PREFIX
mkdir -p $PKG$PREFIX/doc/
mv $PKG$PREFIX/share/doc $PKG$PREFIX/doc/$PRGNAM
mv $PKG$PREFIX/share/licenses $PKG$PREFIX/doc/$PRGNAM
mv $PKG$PREFIX/share/man $PKG$PREFIX/

mkdir -p $PKG$PREFIX/share/zsh/site-functions/
cp -R $CWD/completion.zsh $PKG$PREFIX/share/zsh/site-functions/_crystal

# sed -i "s|INSTALL_DIR=.*|INSTALL_DIR=$PREFIX/libexec/$PRGNAM|g" $PKG$PREFIX/bin/crystal

# packaging
cd $PKG
mkdir install
cat <<EOF > install/slack-desc
$PRGNAM: $PRGNAM (The Crystal Programming Language)
$PRGNAM:
$PRGNAM: Crystal is a programming language with the following goals:
$PRGNAM: .Have the same syntax as Ruby, or at least as similar as possible.
$PRGNAM: .Statically type-checked but without having to specify the type of variables or
$PRGNAM:    method arguments.
$PRGNAM: .Be able to call C code by writing bindings to it in Crystal.
$PRGNAM: .Have compile-time evaluation and generation of code, to avoid boilerplate code.
$PRGNAM: .Compile to efficient native code.
$PRGNAM:
$PRGNAM: http://crystal-lang.org/
EOF

rm -f $PKG/{,usr/}lib$(uname -m | grep -o 64)/*.la
makepkg -l y -c n $OUTPUT/$PRGNAM-$CLEAN_VERSION-$ARCH-$BUILD$TAG.txz