#!/bin/sh
# Copyright (C) 2019 The Mercury team.
#
# This script imports a Mercury source distribution tarball into the
# mercury-srcdist repository.
#

set -eu

if test "$#" -ne 1
then
    echo "Usage: $0 mercury-srcdist-version.tar.{gz,xz}"
    exit 1
fi

archive=$1
if test ! -f "$archive"
then
    echo "Expected file: $archive" >&2
    exit 1
fi

basename=$(basename "$archive")
basename=${basename%.tar.*}
version=${basename#mercury-srcdist-}
version=${version#mercury-compiler-}
tag=$version

# Sanity check.
case $version in
    rotd-20??-??-??*) ;;
    ??.??*) ;;
    *)
        echo "Unexpected version: $version" >&2
        exit 1
        ;;
esac

existtag=$( git tag -l "$tag" )
if test "$existtag" = "$tag"
then
    echo "Tag already exists: $tag"
    exit 0
fi

# Hard code the initial commit in case the user runs this script in an
# unexpected workspace.
#initialcommit=$( git rev-list --max-parents=0 HEAD | tail -n 1 )
initialcommit=9101f6d96bc9d0e2ec0f84048d85b00c4826a595
git checkout --detach "$initialcommit"
git clean -fdxq .
tar xf "$archive" --strip-components=1
git add .
git commit -q -m "Imported $basename"
git tag -a -m "Tag $version" "$tag"