Class: Autobuild::ProgressDisplay

Inherits:
Object
  • Object
show all
Defined in:
lib/autobuild/progress_display.rb

Overview

Management of the progress display

Constant Summary collapse

PROGRESS_MODES =

Valid progress modes

See Also:

%I[single_line newline off].freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(io, color: ::Autobuild.method(:color)) ⇒ ProgressDisplay

Returns a new instance of ProgressDisplay.



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# File 'lib/autobuild/progress_display.rb', line 7

def initialize(io, color: ::Autobuild.method(:color))
    @io = io
    @cursor = TTY::Cursor
    @last_formatted_progress = []
    @progress_messages = Concurrent::Array.new

    @silent = false
    @color = color
    @display_lock = Mutex.new

    @next_progress_display = Time.at(0)
    @progress_mode = :single_line
    @progress_period = 0.1

    @message_queue = Queue.new
    @forced_progress_display = Concurrent::AtomicBoolean.new(false)
end

Instance Attribute Details

#progress_mode ⇒ Symbol

Return the current display mode

Returns:

  • (Symbol)

See Also:

  • mode=


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# File 'lib/autobuild/progress_display.rb', line 69

def progress_mode
  @progress_mode
end

#progress_period ⇒ Float

Minimum time between two progress displays

This does not affect normal messages

Returns:

  • (Float) 


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# File 'lib/autobuild/progress_display.rb', line 43

def progress_period
  @progress_period
end

#silent ⇒ Object 



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# File 'lib/autobuild/progress_display.rb', line 77

def silent
    silent = @silent
    @silent = true
    yield
ensure
    @silent = silent
end

Instance Method Details

#display_progress(consider_period: true) ⇒ Object 



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# File 'lib/autobuild/progress_display.rb', line 191

def display_progress(consider_period: true)
    return unless progress_enabled?
    return if consider_period && (@next_progress_display > Time.now)

    formatted = format_grouped_messages(
        @progress_messages.map(&:last),
        indent: "  "
    )
    if @progress_mode == :newline
        @io.print formatted.join("\n")
        @io.print "\n"
    else
        @io.print @cursor.clear_screen_down
        @io.print formatted.join("\n")
        @io.print @cursor.up(formatted.size - 1) if formatted.size > 1
        @io.print @cursor.column(0)
    end
    @io.flush
    @next_progress_display = Time.now + @progress_period
end

#find_common_prefix(msg, other_msg) ⇒ Object 



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# File 'lib/autobuild/progress_display.rb', line 212

def find_common_prefix(msg, other_msg)
    msg = msg.split(' ')
    other_msg = other_msg.split(' ')
    msg.each_with_index do |token, idx|
        if other_msg[idx] != token
            prefix = msg[0..(idx - 1)].join(" ")
            prefix << ' ' unless prefix.empty?
            return prefix
        end
    end
    msg.join(' ')
end

#format_grouped_messages(raw_messages, indent: " ", width: TTY::Screen.width) ⇒ Object 



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# File 'lib/autobuild/progress_display.rb', line 268

def format_grouped_messages(raw_messages, indent: "  ", width: TTY::Screen.width)
    groups = group_messages(raw_messages)
    groups.each_with_object([]) do |(prefix, messages), lines|
        if prefix.empty?
            lines.concat(messages.map { |m| "#{indent}#{m.strip}" })
            next
        end

        lines << "#{indent}#{prefix.dup.strip} #{messages.shift}"
        until messages.empty?
            msg = messages.shift.strip
            margin = messages.empty? ? 1 : 2
            if lines.last.size + margin + msg.size > width
                lines.last << ","
                lines << +""
                lines.last << indent << indent << msg
            else
                lines.last << ", " << msg
            end
        end
        lines.last << "," unless messages.empty?
    end
end

#group_messages(messages) ⇒ Object 



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# File 'lib/autobuild/progress_display.rb', line 225

def group_messages(messages)
    messages = messages.sort

    groups = Array.new
    groups << ["", (0...messages.size)]
    messages.each_with_index do |msg, idx|
        prefix = nil
        grouping = false
        messages[(idx + 1)..-1].each_with_index do |other_msg, other_idx|
            other_idx += idx + 1
            prefix ||= find_common_prefix(msg, other_msg)
            break unless other_msg.start_with?(prefix)

            if grouping
                break if prefix != groups.last[0]

                groups.last[1] << other_idx
            else
                current_prefix, current_group = groups.last
                if prefix.size > current_prefix.size # create a new group
                    group_end_index = [idx - 1, current_group.last].min
                    groups.last[1] = (current_group.first..group_end_index)
                    groups << [prefix, [idx, other_idx]]
                    grouping = true
                else
                    break
                end
            end
        end
    end
    if groups.last.last.last < messages.size
        groups << ["", (groups.last.last.last + 1)...(messages.size)]
    end

    groups.map do |prefix, indexes|
        indexes = indexes.to_a
        next if indexes.empty?

        range = (prefix.size)..-1
        [prefix, indexes.map { |i| messages[i][range] }]
    end.compact
end

#message(message, *args, io: @io, force: false) ⇒ Object 



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# File 'lib/autobuild/progress_display.rb', line 95

def message(message, *args, io: @io, force: false)
    return if silent? && !force

    io = args.pop if args.last.respond_to?(:to_io)
    @message_queue << [message, args, io]

    refresh_display
end

#progress(key, *args) ⇒ Object 



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# File 'lib/autobuild/progress_display.rb', line 129

def progress(key, *args)
    found = false
    @progress_messages.map! do |msg_key, msg|
        if msg_key == key
            found = true
            [msg_key, @color.call(*args)]
        else
            [msg_key, msg]
        end
    end
    @progress_messages << [key, @color.call(*args)] unless found

    refresh_display
end

#progress_done(key, display_last = true, message: nil) ⇒ Object 



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# File 'lib/autobuild/progress_display.rb', line 144

def progress_done(key, display_last = true, message: nil)
    current_size = @progress_messages.size
    @progress_messages.delete_if do |msg_key, msg|
        if msg_key == key
            message = msg if display_last && !message
            true
        end
    end
    changed = current_size != @progress_messages.size

    if changed
        if message
            message("  #{message}")
            # NOTE: message updates the display already
        else
            refresh_display
        end
        true
    end
end

#progress_enabled=(flag) ⇒ Object

Deprecated.

use progress_mode= instead



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# File 'lib/autobuild/progress_display.rb', line 86

def progress_enabled=(flag)
    self.progress_mode = flag ? :single_line : :off
end

#progress_enabled? ⇒ Boolean

Whether progress messages will be displayed at all

Returns:

  • (Boolean) 


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# File 'lib/autobuild/progress_display.rb', line 91

def progress_enabled?
    !@silent && (@progress_mode != :off)
end

#progress_start(key, *args, done_message: nil) ⇒ Object 



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# File 'lib/autobuild/progress_display.rb', line 104

def progress_start(key, *args, done_message: nil)
    progress_done(key)

    formatted_message = @color.call(*args)
    @progress_messages << [key, formatted_message]
    if progress_enabled?
        @forced_progress_display.make_true
    else
        message "  #{formatted_message}"
    end

    refresh_display

    if block_given?
        begin
            result = yield
            progress_done(key, message: done_message)
            result
        rescue Exception
            progress_done(key)
            raise
        end
    end
end

#refresh_display ⇒ Object 



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# File 'lib/autobuild/progress_display.rb', line 165

def refresh_display
    return unless @display_lock.try_lock

    begin
        refresh_display_under_lock
    ensure
        @display_lock.unlock
    end
end

#refresh_display_under_lock ⇒ Object 



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# File 'lib/autobuild/progress_display.rb', line 175

def refresh_display_under_lock
    # Display queued messages
    until @message_queue.empty?
        message, args, io = @message_queue.pop
        io.print @cursor.clear_screen_down if @progress_mode == :single_line
        io.puts @color.call(message, *args)

        io.flush if @io != io
    end

    # And re-display the progress
    display_progress(consider_period: @forced_progress_display.false?)
    @forced_progress_display.make_false
    @io.flush
end

#silent? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/autobuild/progress_display.rb', line 71

def silent?
    @silent
end

#synchronize(&block) ⇒ Object 



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# File 'lib/autobuild/progress_display.rb', line 25

def synchronize(&block)
    result = @display_lock.synchronize(&block)
    refresh_display
    result
end