#!/bin/bash
#
# Simple parser for static HTML generation
#
#  Copyright (C) 2010 Free Software Foundation, Inc.
#
#  This program is free software: you can redistribute it and/or modify
#  it under the terms of the GNU Affero General Public License as
#  published by the Free Software Foundation, either version 3 of the
#  License, or (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU Affero General Public License for more details.
#
#  You should have received a copy of the GNU Affero General Public License
#  along with this program.  If not, see <http://www.gnu.org/licenses/>.
##

# grab most recent version tag
curver="$( git tag -l \
  | grep '^[0-9]\+.[0-9]\+.[0-9]\+$' \
  | tail -n1
)"

curver_date="$( date "+%d %b %Y" \
  --date="$( git for-each-ref \
    --format='%(*authordate)' \
    "refs/tags/$curver" \
    | cut -d' ' -f1-5 \
  )"
)"


# TODO: Both sed and gawk are unnecessary; it was just the most convenient
# solution
gawk '
  match( $0, /^ *<!--%inc (.*?) *--> *$/, arr ) {
    system( "cat " arr[1] )
    next
  }
  { print }
' \
  | sed "
    s/<!--%curver-->/$curver/g;
    s/<!--%curver-date-->/$curver_date/g;
  "