#!/bin/ksh

# exportit -- a simple little script to export something from a
# git repository and create a "release" tarbal of it, in mostly
# automated fasion.  Re-written from an earlier CVS version.

# Note that people getting this with ttyload will presumably have no
# reason to use it in conjunction with ttyload, unless they're forking
# their own version.  I'd much prefer to get patches or pull requests
# (e.g. on GitHub, though from your own git repo is fine, too).

# Copyright 2001-2011 by David Lindes, All Rights Reserved.
# Distributed under the license described in the file LICENSE that
# comes with ttyload.

# if you're wanting to use this script for some other project,
# and you want to call your release something other than the
# name of the directory above this one (.., but by name), change
# the "false" below to "true", and the "xyzprod" to whatever you
# want to call things.  Note that your tagging will have to also
# be changed appropriately.

if false
then
    # override the name of what to call stuff:
    name="xyzprod"
else
    # make sure name is unset, so that the ${name:-blah}
    # expansion below doesn't get stuff from your environment
    # accidentally
    unset name
fi

# automagical settings for things:
name="${name:-ttyload}" # this used to be automatic, from CVS info.  Skipping that now.
version="`cat Version`"
tagname="${name}_`echo \"$version\" | sed -e 's/[ \.]/_/g'`"
dirname="$name-$version"

for item in "$dirname.tar" "$dirname.tar.gz" "$dirname.tar.bz2"
do
    if [ -e "$item" ]
    then
	echo "Sorry, $item exists, and I need it not to." >&2
	echo "Please remove it or update your Version file to proceed." >&2
	exit 1
    fi
done

# let the user know what the settings came up with:
echo "Creating export of $name version $version (tag: $tagname)"

# export, and if that fails, bail.
git archive --prefix=$dirname/ -o $dirname.tar $tagname || exit 1

# then bzip:
bzip2 -9fv "$dirname.tar"