#!/usr/bin/env ruby
#
# Copyright © 2018-2019 Nick Bowler
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

preprocess do
    commit = nil
    Open3.popen2("git", "rev-parse", "HEAD") do |stdin, stdout, result|
        stdin.close
        val = stdout.gets
        stdout.close
        commit = val.chomp if result.value.success?
    end

    if commit then
        @items.each do |item|
            item[:gitrev] = commit if item_source(item)
        end
    end
end

postprocess do
    # Gzip all text items for nginx http_static
    if !ENV['GZIP_SITE'].to_s.empty?
        reps = @items.flat_map(&:reps).each do |rep|
            file = rep.raw_path
            next if !file or rep.binary?

            if system("gzip", "-ck9", file, [:out]=>[file + ".gz.tmp", "wb"])
                system("touch", "-r", file, file + ".gz.tmp")
                File.rename(file + ".gz.tmp", file + ".gz")
            else
                File.unlink(file + ".gz.tmp")
            end
        end
    end
end

compile '/license/gpl*.md' do
    filter :kramdown, auto_ids: false, header_offset: -1
    layout '/default.xml'
    layout '/gpl.xsl'
    layout '/default.xsl'
    filter :relativize_paths, type: :xml
    filter :remove_wj
    write to_xhtml
end

compile '/**/*.md' do
    filter :erb
    filter :kramdown, auto_ids: false, header_offset: 1
    snapshot :rawbody
    layout '/default.xml'
    layout '/default.xsl'
    filter :relativize_paths, type: :xml
    filter :remove_wj
    write to_xhtml
end

compile '/license/cc*.sgml' do
    filter :sgml2xml
    layout '/creativecommons.xsl'
    layout '/default.xml'
    layout '/default.xsl'
    filter :relativize_paths, type: :xml
    filter :remove_wj
    write to_xhtml
end

compile '/license/cc*.xhtml' do
    layout '/creativecommons.xsl'
    layout '/default.xml'
    layout '/default.xsl'
    filter :relativize_paths, type: :xml
    filter :remove_wj
    write to_xhtml
end

passthrough '/**/*'
layout '/**/*.xsl', :xsl
layout '/**/*', :erb