#! /usr/bin/env ruby

if RUBY_VERSION < "1.8.7"
    STDERR.puts "autoproj requires Ruby >= 1.8.7"
    exit 1
end

require 'autoproj'
require 'autoproj/autobuild'
require 'open-uri'

require 'highline'
include Autoproj

InputError = Autoproj::InputError
module Autoproj
    @verbose = false
    @console = HighLine.new

    class << self
        attr_accessor :verbose
        attr_reader :console
    end
end

# Some configuration variables
mail_config = Hash.new
only_update_sources = false
only_do_status      = false
no_os_deps = false
debug = false

# Parse the configuration options
parser = OptionParser.new do |opts|
    opts.banner = <<-EOBANNER
autoproj mode [options]
where 'mode' is one of:
  build:  import, build and install all packages that need it. A package or package
    set name can be given, in which case only this package and its dependencies
    will be taken into account. Example:

    autoproj build drivers/hokuyo
      
  force-build: triggers all build commands, i.e. don't be lazy like in "build"
  fast-build: builds without updating and without considering OS dependencies
  rebuild: clean and then rebuild
  doc:    generate and install documentation for packages that have some
  update: only import/update packages, do not build them
  status: displays the state of the packages w.r.t. their source VCS
  bootstrap: starts a new autoproj installation. Usage:
    autoproj bootstrap [manifest_url|source_vcs source_url opt1=value1 opt2=value2 ...]
  
  list-sets:   list all available package sets
  update-sets: update the package sets definitions
  switch-config: change where the configuration should be taken from. Syntax:
    autoproj switch-config source_vcs source_url opt1=value1 opt2=value2 ...

    For example:
    autoproj switch-config git git://github.com/doudou/rubim-all.git branch=all

Additional options:
    EOBANNER
    opts.on("--reconfigure", "re-ask all configuration options (build mode only)") do
        Autoproj.reconfigure = true
    end
    opts.on("--no-update", "do not update already checked-out packages (build mode only)") do
        Autobuild.do_update = false
    end

    opts.on("--no-osdeps", "do not install prepackaged dependencies") do
        no_os_deps = true
    end

    opts.on("--verbose", "verbose output") do
        Autoproj.verbose  = true
        Autobuild.verbose = true
        Rake.application.options.trace = false
    end
    opts.on("--debug", "debugging output") do
        Autoproj.verbose  = true
        Autobuild.verbose = true
        Rake.application.options.trace = true
        debug = true
    end
    opts.on('--nice NICE', Integer, 'nice the subprocesses to the given value') do |value|
        Autobuild.nice = value
    end
    opts.on("-h", "--help", "Show this message") do
        puts opts
        exit
    end
    opts.on("--mail-from EMAIL", String, "From: field of the sent mails") do |from_email|
        mail_config[:from] = from_email
    end
    opts.on("--mail-to EMAILS", String, "comma-separated list of emails to which the reports should be sent") do |emails| 
        mail_config[:to] ||= []
        mail_config[:to] += emails.split(',')
    end
    opts.on("--mail-subject SUBJECT", String, "Subject: field of the sent mails") do |subject_email|
        mail_config[:subject] = subject_email
    end
    opts.on("--mail-smtp HOSTNAME", String, " address of the mail server written as hostname[:port]") do |smtp|
        raise "invalid SMTP specification #{smtp}" unless smtp =~ /^([^:]+)(?::(\d+))?$/
            mail_config[:smtp] = $1
        mail_config[:port] = Integer($2) if $2 && !$2.empty?
    end
    opts.on("--mail-only-errors", "send mail only on errors") do
        mail_config[:only_errors] = true
    end
end

args = ARGV.dup
parser.parse!(args)
mode     = args.shift
selected_packages = args.dup
Autobuild::Reporting << Autoproj::Reporter.new

def color(*args)
    Autoproj.console.color(*args)
end

def display_status(packages)
    last_was_in_sync = false

    packages.each do |pkg|
        lines = []

        if !pkg.importer.respond_to?(:status)
            # This importer does not support status display
            STDERR.puts color("  the importer of #{pkg.autoproj_name} does not support status display (#{pkg.importer.class.name})", :bold, :red)
            next
        end

        if !File.directory?(pkg.srcdir)
            lines << color("  is not imported yet", :magenta)
        else
            status = pkg.importer.status(pkg)
            if status.uncommitted_code
                lines << color("  contains uncommitted modifications", :red)
            end

            case status.status
            when Autobuild::Importer::Status::UP_TO_DATE
                if !status.uncommitted_code
                    if last_was_in_sync
                        STDERR.print ", #{pkg.autoproj_name}"
                    else
                        STDERR.print pkg.autoproj_name
                    end
                    last_was_in_sync = true
                    next
                else
                    lines << color("  local and remote are in sync", :green)
                end
            when Autobuild::Importer::Status::ADVANCED
                lines << color("  local contains #{status.local_commits.size} commit that remote does not have:", :magenta)
                status.local_commits.each do |line|
                    lines << color("    #{line}", :magenta)
                end
            when Autobuild::Importer::Status::SIMPLE_UPDATE
                lines << color("  remote contains #{status.remote_commits.size} commit that local does not have:", :magenta)
                status.remote_commits.each do |line|
                    lines << color("    #{line}", :magenta)
                end
            when Autobuild::Importer::Status::NEEDS_MERGE
                lines << color("  local and remote have diverged with respectively #{status.local_commits.size} and #{status.remote_commits.size} commits each", :magenta)
                lines << "  -- local commits --"
                status.local_commits.each do |line|
                    lines << color("   #{line}", :magenta)
                end
                lines << "  -- remote commits --"
                status.remote_commits.each do |line|
                    lines << color("   #{line}", :magenta)
                end
            end
        end

        if last_was_in_sync
            STDERR.puts color(": local and remote are in sync", :green)
        end

        last_was_in_sync = false
        if pkg.respond_to?(:text_name)
            STDERR.print "#{pkg.text_name}:"
        else
            STDERR.print "#{pkg.autoproj_name}:"
        end

        if lines.size == 1
            STDERR.puts lines.first
        else
            STDERR.puts
            STDERR.puts lines.join("\n")
        end
    end
    if last_was_in_sync
        STDERR.puts color(": local and remote are in sync", :green)
    end
end
def do_status(packages)
    console = Autoproj.console
    
    sources = Autoproj.manifest.each_configuration_source.
        map do |vcs, text_name, pkg_name, local_dir|
            Autoproj::Manifest.create_autobuild_package(vcs, text_name, pkg_name, local_dir)
        end

    if !sources.empty?
        STDERR.puts color("autoproj: displaying status of configuration", :bold)
        display_status(sources)
        STDERR.puts
    end


    STDERR.puts color("autoproj: displaying status of packages", :bold)
    packages = packages.sort.map do |pkg_name|
        Autobuild::Package[pkg_name]
    end
    display_status(packages)

end

def switch_config(*args)
    Autoproj.load_config
    if Autoproj.has_config_key?('manifest_source')
        vcs = Autoproj.normalize_vcs_definition(Autoproj.user_config('manifest_source'))
    end

    if vcs && (vcs.type == args[0] && vcs.url == args[1])
        # Don't need to do much: simply change the options and save the config
        # file, the VCS handler will take care of switching the options
    else
        # We will have to delete the current autoproj directory. Ask the user.
        opt = Autoproj::BuildOption.new("delete current config", "boolean", Hash[:default => "false", :doc => "delete the current configuration ? (required to switch)"], nil)
        return if !opt.ask(nil)
        FileUtils.rm_rf File.join(Autoproj.config_dir)
        do_switch_config(*args)
    end

    # And now save the options: note that we keep the current option set even
    # though we switched configuration. This is not a problem as undefined
    # options will not be reused
    #
    # TODO: cleanup the options to only keep the relevant ones
    vcs_def = Hash['type' => args.shift, 'url' => args.shift]
    args.each do |opt|
        opt_name, opt_val = opt.split '='
        vcs_def[opt_name] = opt_val
    end
    # Validate the option hash, just in case
    Autoproj.normalize_vcs_definition(vcs_def)
    # Save the new options
    Autoproj.change_option('manifest_source', vcs_def, true)
    Autoproj.save_config
end

def do_switch_config(*args)
    vcs_def = Hash.new
    vcs_def[:type] = args.shift
    vcs_def[:url]  = args.shift
    while !args.empty?
        name, value = args.shift.split("=")
        vcs_def[name] = value
    end

    vcs = Autoproj.normalize_vcs_definition(vcs_def)

    # Install the OS dependencies required for this VCS
    osdeps = Autoproj::OSDependencies.load_default
    osdeps.install([vcs.type])
    Autoproj::Manifest.update_source(vcs, "autoproj main configuration", 'autoproj_config', File.join(Dir.pwd, "autoproj"))

    # Now write it in the config file
    File.open(File.join(Autoproj.config_dir, "config.yml"), "a") do |io|
        io.puts <<-EOTEXT
manifest_source:
    type: #{vcs_def.delete(:type)}
    url: #{vcs_def.delete(:url)}
    #{vcs_def.map { |k, v| "#{k}: #{v}" }.join("\n    ")}
        EOTEXT
    end
end

def do_bootstrap(*args)
    if File.exists?(File.join("autoproj", "manifest"))
        raise ConfigError, "this installation is already bootstrapped. Remove the autoproj directory if it is not the case"
    end
    Autobuild.logdir = File.join('build', 'log')

    # Check if we are being called from another GEM_HOME. If it is the case,
    # assume that we are bootstrapping from another installation directory and
    # start by copying the .gems directory
    if ENV['GEM_HOME'] && ENV['GEM_HOME'] =~ /\.gems\/?$/ && ENV['GEM_HOME'] != File.join(Dir.pwd, ".gems")
        STDERR.puts "autoproj: reusing bootstrap from #{File.dirname(ENV['GEM_HOME'])}"
        FileUtils.cp_r ENV['GEM_HOME'], ".gems"
        ENV['GEM_HOME'] = File.join(Dir.pwd, ".gems")
        exec $0, *ARGV
    end

    # If we are not getting the installation setup from a VCS, copy the template
    # files
    if args.empty? || args.size == 1
        sample_dir = File.expand_path(File.join("..", "samples"), File.dirname(__FILE__))
        FileUtils.cp_r File.join(sample_dir, "autoproj"), "autoproj"
    end

    if args.size == 1 # the user asks us to download a manifest
        manifest_url = args.first
        STDERR.puts color("autoproj: downloading manifest file #{manifest_url}", :bold)
        manifest_data =
            begin open(manifest_url) { |file| file.read }
            rescue
                raise ConfigError, "cannot read #{manifest_url}, did you mean 'autoproj bootstrap VCSTYPE #{manifest_url}' ?"
            end

        File.open(File.join(Autoproj.config_dir, "manifest"), "w") do |io|
            io.write(manifest_data)
        end

    elsif args.size >= 2 # is a VCS definition for the manifest itself ...
        do_switch_config(*args)
    end

    # Finally, generate an env.sh script
    File.open('env.sh', 'w') do |io|
        io.write <<-EOSHELL
export RUBYOPT=-rubygems
export GEM_HOME=#{Dir.pwd}/.gems
export PATH=$GEM_HOME/bin:$PATH
        EOSHELL
    end

    STDERR.puts <<EOTEXT

add the following line at the bottom of your .bashrc:
  source #{Dir.pwd}/env.sh

WARNING: autoproj will not work until your restart all
your consoles, or run the following in them:
  $ source #{Dir.pwd}/env.sh

EOTEXT

end

def report(debug)
    Autobuild::Reporting.report do
        yield
        Autobuild::Reporting.success
    end

rescue ConfigError => e
    STDERR.puts
    STDERR.puts color(e.message, :red, :bold)
    if debug then raise
    else exit 1
    end
rescue Interrupt
    STDERR.puts
    STDERR.puts color("Interrupted by user", :red, :bold)
    if debug then raise
    else exit 1
    end
end

Autobuild.doc_errors = false
Autobuild.do_doc = false

# Find the autoproj root dir
report(debug) do
    case mode
    when "bootstrap"
        # If there is no argument, We need one more argument. It is either a VCS type or a path to a
        # manifest.
        #
        # In the first case, we create a new manifest and add the source given on
        # the command line to it. In the second case, we simply use it as a
        # manifest.
        do_bootstrap(*args)
        if args.empty?
            # no package sets defined, we're done
            exit(0)
        end
        only_update_sources = true

    when "build"
    when "force-build"
        Autobuild.do_forced_build = true
    when "rebuild"
        Autobuild.do_rebuild = true
    when "fast-build"
        Autobuild.do_update = false
        no_os_deps = true
    when "update"
        Autobuild.do_build  = false
    when "status"
        only_do_status      = true
        Autobuild.do_update = false
        no_os_deps = true
    when "update-sets"
        only_update_sources = true
    when "list-sets"
        only_update_sources = true
        Autobuild.do_update = false
    when "switch-config"
        if switch_config(*args)
            exit 0
        else
            exit 1
        end
    when "doc"
        Autobuild.do_update = false
        Autobuild.do_doc    = true
        Autobuild.only_doc  = true
    else
        puts parser
        exit(1)
    end

    # Expand directories in the selected_packages set
    root_dir = Autoproj.root_dir
    selected_packages.map! do |name|
        if File.directory?(name)
            File.expand_path(name).gsub(/^#{Regexp.quote(root_dir)}/, '')
        else
            name
        end
    end

    Dir.chdir(root_dir)

    # Load user configuration
    Autoproj.load_config
    # If we are under rubygems, check that the GEM_HOME is right ...
    if $LOADED_FEATURES.any? { |l| l =~ /rubygems/ }
        if ENV['GEM_HOME'] != Autoproj.gem_home
            raise ConfigError, "RubyGems is already loaded with a different GEM_HOME, make sure you are loading the right env.sh script !"
        end
    end
    # Set up some important autobuild parameters
    Autoproj.env_inherit 'PATH', 'PKG_CONFIG_PATH', 'RUBYLIB', 'LD_LIBRARY_PATH'
    Autoproj.env_set 'GEM_HOME', Autoproj.gem_home
    Autoproj.env_add 'PATH', File.join(Autoproj.gem_home, 'bin')
    Autoproj.env_set 'RUBYOPT', "-rubygems"
    Autobuild.prefix  = Autoproj.build_dir
    Autobuild.srcdir  = root_dir
    Autobuild.logdir = File.join(Autobuild.prefix, 'log')
    if mail_config[:to]
        Autobuild::Reporting << Autobuild::MailReporter.new(mail_config)
    end

    # First things first, see if we need to update ourselves
    osdeps = Autoproj::OSDependencies.load_default
    if osdeps.install(%w{autobuild autoproj})
        # We updated autobuild or autoproj themselves ... Restart !
        exec($0, *ARGV)
    end

    manifest_path = File.join(Autoproj.config_dir, 'manifest')
    # Load the installation's manifest a first time, to check if we should
    # update it ... We assume that the OS dependencies for this VCS is already
    # installed (i.e. that the user did not remove it)
    manifest = Manifest.load(manifest_path)
    if manifest.vcs && mode != "bootstrap"
        manifest.update_yourself
        manifest = Manifest.load(manifest_path)
    end
    Autoproj.manifest = manifest

    source_os_dependencies = manifest.each_remote_source(false).
        inject(Set.new) do |set, source|
            set << source.vcs.type if !source.local?
        end

    # Update the remote sources if there are any
    if manifest.has_remote_sources?
        STDERR.puts color("autoproj: updating remote definitions of package sets", :bold)
        # If we need to install some packages to import our remote sources, do it
        if !no_os_deps
            osdeps = manifest.known_os_packages
            osdeps.install(source_os_dependencies)
        end

        manifest.update_remote_sources
        STDERR.puts
    end

    # Load init.rb files. each_source must not load the source.yml file, as
    # init.rb may define configuration options that are used there
    manifest.each_source(false) do |source|
        Autoproj.load_if_present(source, source.local_dir, "init.rb")
    end

    # Load the required autobuild definitions
    STDERR.puts color("autoproj: loading ...", :bold)
    if !Autoproj.reconfigure?
        STDERR.puts color("run 'autoproj --reconfigure' to change configuration values", :bold)
    end
    manifest.each_autobuild_file do |source, name|
        Autoproj.import_autobuild_file source, name
    end

    # Load the package's override files. each_source must not load the
    # source.yml file, as init.rb may define configuration options that are used
    # there
    manifest.each_source(false).to_a.reverse.each do |source|
        Autoproj.load_if_present(source, source.local_dir, "overrides.rb")
    end

    # Now, load the package's importer configurations (from the various
    # source.yml files)
    manifest.load_importers

    # Configuration is finished, so all relevant configuration options should
    # have been asked to the user. Save it.
    Autoproj.save_config

    if Autoproj.verbose
        # List defined packages, and in which autobuild files they are defined
        STDERR.puts "Available packages:"
        manifest.packages.each_value do |package, source, file|
            STDERR.puts "  #{package.name}: #{file} from #{source.name}"
        end
    end

    # If in verbose mode, or if we only update sources, list the sources
    #
    # Note that we can't have the Manifest class load the source.yml file, as it
    # cannot resolve all constants. So we need to do it ourselves to get the
    # name ...
    if Autoproj.verbose || only_update_sources
        sources = manifest.each_source(false).to_a

        if sources.empty?
            STDERR.puts color("autoproj: no package sets defined in autoproj/manifest", :bold, :red)
        else
            STDERR.puts color("autoproj: available package sets", :bold)
            manifest.each_source(false) do |source|
                source_yml = source.raw_description_file
                STDERR.puts "  #{source_yml['name']}"
                if source.local?
                    STDERR.puts "    local source in #{source.local_dir}"
                else
                    STDERR.puts "    from:  #{source.vcs}"
                    STDERR.puts "    local: #{source.local_dir}"
                end

                lines = []
                source.each_package.
                    map { |pkg| [pkg.name, manifest.package_manifests[pkg.name]] }.
                    sort_by { |name, _| name }.
                    each do |name, source_manifest|
                        vcs_def = manifest.importer_definition_for(name)
                        if source_manifest
                            lines << [name, source_manifest.short_documentation]
                            lines << ["", vcs_def.to_s]
                        else
                            lines << [name, vcs_def.to_s]
                        end
                    end

                w_col1, w_col2 = nil
                lines.each do |col1, col2|
                    w_col1 = col1.size if !w_col1 || col1.size > w_col1
                    w_col2 = col2.size if !w_col2 || col2.size > w_col2
                end
                STDERR.puts "    packages:"
                format = "    | %-#{w_col1}s | %-#{w_col2}s |"
                lines.each do |col1, col2|
                    STDERR.puts(format % [col1, col2])
                end
            end
        end
    end
    if only_update_sources
        exit(0)
    end

    # Create the build target from the manifest if the user did not provide an
    # explicit one
    if selected_packages.empty?
        selected_packages = manifest.default_packages
    end
    if selected_packages.empty? # no packages, terminate
        STDERR.puts
        STDERR.puts color("autoproj: no packages defined", :red)
        exit 0
    end
    selected_packages = selected_packages.to_set

    # Now starts a different stage of the whole build. Until now, we were
    # working on the whole package set. Starting from now, we need to build the
    # package sets based on the layout file
    #
    # First, we allow to user to specify packages based on disk paths, so
    # resolve those
    selected_packages = manifest.expand_package_selection(selected_packages)
    if selected_packages.empty?
        STDERR.puts color("autoproj: wrong packages selection on command line", :red)
        exit 0
    elsif Autoproj.verbose
        STDERR.puts "will install #{selected_packages.to_a.join(", ")}"
    end
    seen = Set.new
    manifest.each_package_set do |name, packages, enabled_packages|
        packages -= seen

        srcdir  = File.join(Autoproj.root_dir, name)
        prefix  = File.join(Autoproj.build_dir, name)
        logdir  = File.join(prefix, "log")
        packages.each do |pkg_name|
            pkg = Autobuild::Package[pkg_name]
            pkg.srcdir = File.join(srcdir, pkg_name)
            pkg.prefix = prefix
            pkg.logdir = logdir
        end
        seen |= packages
    end

    if only_do_status
        STDERR.puts
        all_packages = Set.new
        manifest.handle_enabled_packages(selected_packages) do |name, _, layout_enabled|
            all_packages |= layout_enabled
        end
        do_status(all_packages)
        exit(0)
    end

    STDERR.puts
    STDERR.puts color("autoproj: importing and loading selected packages", :bold)

    # Install prepackaged dependencies needed to import and build the packages
    if !no_os_deps
        osdeps = manifest.known_os_packages
        osdeps.install(Autoproj.build_system_dependencies - source_os_dependencies)
    end

    # First thing: do the import. We are handling the imports ourselves as it
    # allows us to complete the enabled_packages set with the package
    # dependencies. The scheme is as follows:
    #  * we import a package, prepare it and load its manifest
    #  * we look at its dependencies. Dependencies are either already handled
    #    (and nothing needs to be done) or are to-be-handled at this level.
    #    Otherwise, it is considered as an error
    #
    seen = Set.new
    manifest.each_package_set do |name, packages, enabled_packages|
        packages -= seen

        old_update_flag = Autobuild.do_update
        begin
            Autobuild.do_update = false
            packages.each do |pkg_name|
                pkg = Autobuild::Package[pkg_name]
                if File.directory?(pkg.srcdir)
                    Rake::Task["#{pkg_name}-import"].invoke
                end
            end
        ensure
            Autobuild.do_update = old_update_flag
        end

        seen |= packages
    end

    all_packages         = Set.new
    all_enabled_packages = Set.new
    all_sublayouts       = Set.new
    manifest.handle_enabled_packages(selected_packages) do |name, packages, enabled_packages, _|
        packages         -= all_enabled_packages
        enabled_packages -= all_enabled_packages
        all_sublayouts << name

        packages_to_import = enabled_packages.dup.to_set
        while !packages_to_import.empty?
            import_now, packages_to_import = packages_to_import, Set.new
            import_now.sort.each do |pkg_name|
                # Already handled in this part of the layout
                next if all_enabled_packages.include?(pkg_name)

                # Not handled already. Import.
                Autobuild::Package[pkg_name].import
                manifest.load_package_manifest(pkg_name)
                all_enabled_packages << pkg_name

                # Add its dependencies to the next import set
                Autobuild::Package[pkg_name].dependencies.each do |dep_name|
                    if !Autobuild::Package[dep_name]
                        raise ConfigError, "#{pkg_name} depends on #{dep_name}, but it does not seem to exist"
                    elsif all_enabled_packages.include?(dep_name)
                        next
                    end
                    packages_to_import << dep_name
                end
            end
        end
        all_packages.merge(packages)
    end

    old_update_flag = Autobuild.do_update
    begin
        Autobuild.do_update = false
        prepare_targets = all_packages.
            find_all { |pkg_name| File.directory?(Autobuild::Package[pkg_name].srcdir) }.
            map { |pkg_name| "#{pkg_name}-prepare" }
        task "autoproj-prepare" => prepare_targets
        Rake::Task["autoproj-prepare"].invoke
    ensure
        Autobuild.do_update = old_update_flag
    end

    missing_packages = all_packages.
        find_all do |pkg_name|
            !File.directory?(Autobuild::Package[pkg_name].srcdir)
        end

    if missing_packages.empty?
        # Backward compatibility: check if name/env.sh exists, and if it is
        # the case, simply replace it with a link to the root one. And issue
        # a warning
        all_sublayouts.each do |name|
            env_file = File.join(Autoproj.root_dir, name, "env.sh")
            if name != '/' && File.file?(env_file)
                File.open(env_file, 'w') do |io|
                    io.puts "source #{Autoproj.root_dir}/env.sh"
                end
            end
        end
        Autoproj.export_env_sh
        STDERR.puts color("autoproj: updated #{Autoproj.root_dir}/env.sh", :green)
    else
        STDERR.puts color("autoproj: #{missing_packages.join(", ")} are not yet imported, #{Autoproj.root_dir}/env.sh might not be up to date", :red)
    end

    if all_enabled_packages.empty?
        STDERR.puts color("autoproj: nothing to do", :bold)
    elsif Autobuild.do_build
        if Autobuild.only_doc
            STDERR.puts color("autoproj: building and installing documentation", :bold)
        else
            STDERR.puts color("autoproj: building and installing packages", :bold)
        end

        if !no_os_deps
            manifest.install_os_dependencies(all_enabled_packages)
        end

        Autobuild.apply(all_enabled_packages, "autoproj-build")
    elsif !no_os_deps
        manifest.install_os_dependencies(all_enabled_packages)
    end

    prefixes = all_enabled_packages.inject(Set.new) do |set, pkg_name|
        set << Autobuild::Package[pkg_name].prefix
    end
    prefixes.each do |prefix|
        libdir = File.join(prefix, "lib")
        if File.directory?(libdir)
            Autoproj.validate_solib_dependencies(libdir)
        end
    end
end