#!/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

redo-ifchange module-name VERSION
mod_name=`cat module-name`

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

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

mkinfo() {
    ${MAKEINFO:=makeinfo} --plaintext \
        --set-customization-variable CLOSE_QUOTE_SYMBOL=\" \
        --set-customization-variable OPEN_QUOTE_SYMBOL=\" \
        -D "VERSION `cat VERSION`" $@
}

texi=$(mktemp)
cat > $texi <<EOF
\input texinfo
@documentencoding UTF-8
@settitle INSTALL
@include install.texi
@bye
EOF
perl -i -p -e "s/.verbatiminclude PUBKEY.asc/Look in PUBKEY.asc file./" install.texi
mkinfo --output INSTALL $texi
rm $texi

rm -rf .redo .git .gitignore style.css makedist.sh www.do module-name.do VERSION.do
echo 'GOPATH=`pwd` ${GO:=go} build -o $3 `cat module-name`' > gocheese.do
echo 'GOPATH=`pwd` ${GO:=go} test `cat module-name`/... >&2' > test.do
cp ~/work/redo/minimal/do contrib/do

find . -type d -exec chmod 755 {} \;
find . -type f -exec chmod 644 {} \;
chmod 755 contrib/pyshop2packages.sh contrib/do

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/