#!/usr/bin/env bash

usage() {
    local error="$1"

    cat >&2 <<EOF
Usage:
  $0 PROJECT REV

Synopsis:
  Call git-archive(1) to create a release archive of the desired project at the
  desired revision.

  Outputs a gzipped tarball to the release/ directory.

Example:
  $0 urbit v0.10.3

Error:
  -> $error
EOF

    exit 1
}

args="$@"

if [[ -z "$args" ]]; then
    usage "No arguments specified."
fi

PROJECT=$1
REV=$2

mkdir -p release

git archive --prefix="$REV/" \
  -o release/$REV.tar.gz \
  $REV:pkg/$PROJECT