#!/usr/bin/env nix-script
#!>zsh
#! shell | zsh curl haskellPackages.cabal-install

# functions
conf(){ cat *.cabal | grep -Po "^$1:\s+\K.+" }
input(){ read "reply?$1 "; echo ${reply:-$2} }
inputpw(){ echo -n "$1 " >&2; scat --silent --nocode -n 24 -S $2; echo >&2 }

# parameters
package=$(conf name)
version=$(conf version)
author=$(conf author)

# authentication
user=$(input "user ($author):" $author)
password=$(inputpw "password:" hackage)

cabal configure &&
cabal build &&
cabal haddock \
  --hyperlink-source                            \
  --html-location='/package/$pkg-$version/docs' \
  --contents-location='/package/$pkg'

S=$?
if [ "$S" = "0" ]; then
  cd dist/doc/html
  ddir="$package-$version-docs"
  cp -rf $package $ddir &&
  tar -cz --format=ustar -f "$ddir.tar.gz" $ddir
  CS=$?
  if [ "$CS" -eq "0" ]; then
    echo "Uploading to Hackage..."
    curl \
      -X PUT                                                      \
      -H 'Content-Type: application/x-tar'                        \
      -H 'Content-Encoding: gzip'                                 \
      -u "$user:$password"                                        \
      --data-binary "@$ddir.tar.gz"                               \
      "https://hackage.haskell.org/package/$package-$version/docs"
    exit $?
  else
    echo "Error when packaging the documentation."
    exit $CS
  fi
else
  echo "Error when trying to build the package."
  exit $S
fi