#!/bin/sh -ex

cur=$(pwd)
tmp=$(mktemp -d)
release=$1
[ -n "$release" ]

git clone . $tmp/gocheese-$release
cd $tmp/gocheese-$release
git checkout v$release

mod_name=$(sed -n 's/^module //p' go.mod)
crypto_mod_path=$(sed -n 's#^require \(golang.org/x/crypto\) \(.*\)$#\1@\2#p' go.mod)
mkdir -p src/$mod_name
mv *.go go.mod go.sum src/$mod_name

mods="
golang.org/x/crypto
golang.org/x/net
"
for mod in $mods; do
    mod_path=$(sed -n "s# // indirect## ; s#^	\($mod\) \(.*\)\$#\1@\2#p" src/$mod_name/go.mod)
    [ -n "$mod_path" ]
    mkdir -p src/$mod
    ( cd $GOPATH/pkg/mod/$mod_path ; tar cf - --exclude ".git*" * ) | tar xfC - src/$mod
    chmod -R +w src/$mod
done

for mod in golang.org/x/sys; do
    mod_path=$(sed -n "s#^\($mod\) \(.*\) h1:.*\$#\1@\2#p" src/$mod_name/go.sum | sed /go.mod/d | sort -n -r | sed -n 1p)
    [ -n "$mod_path" ]
    mkdir -p src/$mod
    ( cd $GOPATH/pkg/mod/$mod_path ; tar cf - --exclude ".git*" * ) | tar xfC - src/$mod
    chmod -R +w src/$mod
done

cat > $tmp/includes <<EOF
golang.org/x/crypto/AUTHORS
golang.org/x/crypto/argon2
golang.org/x/crypto/blake2b
golang.org/x/crypto/CONTRIBUTORS
golang.org/x/crypto/go.mod
golang.org/x/crypto/go.sum
golang.org/x/crypto/LICENSE
golang.org/x/crypto/PATENTS
golang.org/x/crypto/README.md
golang.org/x/net/AUTHORS
golang.org/x/net/CONTRIBUTORS
golang.org/x/net/go.mod
golang.org/x/net/go.sum
golang.org/x/net/LICENSE
golang.org/x/net/netutil
golang.org/x/net/PATENTS
golang.org/x/net/README.md
golang.org/x/sys/AUTHORS
golang.org/x/sys/CONTRIBUTORS
golang.org/x/sys/cpu
golang.org/x/sys/go.mod
golang.org/x/sys/LICENSE
golang.org/x/sys/PATENTS
golang.org/x/sys/README.md
EOF
tar cfCI - src $tmp/includes | tar xfC - $tmp
rm -fr src/golang.org $tmp/includes
mv $tmp/golang.org src

cat > download.texi <<EOF
@node Download
@unnumbered Download
You can obtain releases source code prepared tarballs on
@url{http://gocheese.cypherpunks.ru/}.
EOF
make gocheese.info

rm -rf .git .gitignore style.css makedist* www.mk

find . -type d -exec chmod 755 {} \;
find . -type f -exec chmod 644 {} \;
chmod +x pyshop2packages.sh

cd ..
tar cvf gocheese-"$release".tar --uid=0 --gid=0 --numeric-owner gocheese-"$release"
xz -9 gocheese-"$release".tar
gpg --detach-sign --sign --local-user CD5CD01F55343D88 gocheese-"$release".tar.xz

tarball=gocheese-"$release".tar.xz
size=$(( $(stat -f %z $tarball) / 1024 ))
hash=$(gpg --print-md SHA256 < $tarball)
release_date=$(date "+%Y-%m-%d")

cat <<EOF
An entry for documentation:
@item $release @tab $release_date @tab $size KiB
@tab @url{gocheese-${release}.tar.xz, link} @url{gocheese-${release}.tar.xz.sig, sign}
@tab @code{$hash}
EOF

mv $tmp/$tarball $tmp/"$tarball".sig $cur/gocheese.html/