#! /usr/bin/ruby

# :main: README

require 'rake'
require 'ostruct'
require 'optparse'

require 'autobuild/options'
require 'autobuild/config'
require 'autobuild/reporting'
require 'daemons'

include Autobuild

DEFAULT_HTTP_PORT = 2000

def parse_options(args)
    options = Options.default

    parser = OptionParser.new do |opts|
        opts.banner = "Usage: autobuild [options] <config file>"

        opts.separator ""
        opts.separator "Path specification"
        opts.on("--srcdir PATH", "sources are installed in PATH") do |options.srcdir| end
        opts.on("--prefix PATH", "built packages are installed in PATH") do |options.prefix|
            options.logdir = "#{options.prefix}/autobuild"
        end
        opts.on("--logdir PATH", "logs are saved in PATH (default: <prefix>/autobuild)") do |options.logdir| end

        opts.separator ""
        opts.separator "General behaviour"
        opts.on('--nice NICE', Integer, 'nice the subprocesses to the given value') do |options.nice| end
        opts.on("--[no-]daemon", "go into daemon mode") do |options.daemonize| end
        opts.on("--[no-]update", "update already checked-out sources") do |options.update| end
        opts.on("--[no-]build",  "only prepare packages, do not build them") do |options.do_build| end 

        opts.separator ""
        opts.separator "Program output"
        opts.on("--[no-]verbose", "display output of commands on stdout") do |options.verbose| end
        opts.on("--[no-]debug", "verbose information (for debugging purposes)") do |options.debug| end

        opts.on_tail("-h", "--help", "Show this message") do
            puts opts
            exit
        end
    end

    parser.parse!(args)
    if !args[0]
        puts parser
        exit
    end

    [ options, args[0], args[1..-1] ]
end

# Load the command line options
options, conffile, targets = parse_options(ARGV)

# make conffile an absolute path since daemonize mode makes
# / the current directory
conffile = File.expand_path(conffile, Dir.pwd)
if options.daemonize
    puts "Going into daemon mode ..."
    Daemons.daemonize 
end

Reporting << StdoutReporter.new
begin
    Reporting.report do
        begin
            File.open(conffile) do |f|
                Autobuild::Config.load(f, options)
            end

            if options.do_build
                if targets.empty?
                    Rake::Task[:default].invoke
                else
                    targets.each { |t| Rake::Task[t.to_sym].invoke }
                end
            end
        rescue ConfigException => e
            e.target = conffile
            raise
        end
        Reporting.success
    end
rescue Interrupt
end