#!/bin/sh

##==============================================================================
## Copyright 2010 Erlang Solutions Ltd.
## 
## Licensed under the Apache License, Version 2.0 (the "License");
## you may not use this file except in compliance with the License.
## You may obtain a copy of the License at
##
## http://www.apache.org/licenses/LICENSE-2.0
##
## Unless required by applicable law or agreed to in writing, software
## distributed under the License is distributed on an "AS IS" BASIS,
## WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
## See the License for the specific language governing permissions and
## limitations under the License.
##==============================================================================

NAME=$1
VSN=$2

yesno() {
    prompt=$1
    while true; do
        read -p "$1 [Y/n] " answer
        case "x$answer" in
            "x")
            return 0
            ;;
            "xY")
            return 0
            ;;
            "xy")
            return 0
            ;;
            "xN")
            return 1
            ;;
            "xn")
            return 1
            ;;
            *)
            ;;
        esac
    done
}

get_version() {
    while true; do
        read -p "What is the version of the release? [$VSN] " release_vsn

        if [ "$release_vsn" = "" ]; then
            release_vsn=$VSN
        fi

        if $(echo "$TAGS" | grep -q "^$release_vsn\$"); then
            if yesno "A tag exists for version $release_vsn, is this correct?"; then
                break
            fi
        else
            if yesno "A tag doesn't exist for version $release_vsn, should one be created?"; then
                hg tag $release_vsn
            fi
            break
        fi
    done
    echo $release_vsn
}

if ! git branch 1>/dev/null 2>&1; then
    echo "No git repository here..."
    exit 1
fi

if ! [ "$(git branch | grep '^\*' | awk '{print $2};')" = "master" ]; then
    if ! yesno "Repository is not at master, do you want to continue?"; then
        exit 1
    fi
fi

if ! yesno "Did the compilation run without warnings?"; then
    echo "Try again..."
    exit 1
fi

if ! yesno "Is the changelog up to date?"; then
    echo "Try again..."
    exit 1
fi

if ! yesno "Did dialyzer run without warnings?"; then
    echo "Try again..."
    exit 1
fi

TAGS=$(hg tags | awk '{print $1 };' | grep -v "^tip$")
LATEST_TAG=$(echo "$TAGS" | head -n 1)

RELEASE_VSN=$(get_version)
echo "Creating a release for $NAME-$RELEASE_VSN now."
archive="./$NAME-$RELEASE_VSN.tar.gz"
if [ -e $archive ]; then
    echo "$archive exists, giving up."
    exit 1
fi
echo hg archive -t tgz -X ".hg*" $archive