Module: FlossFunding::Terminal

Defined in:
lib/floss_funding/terminal_helpers.rb

Overview

Helpers for interacting with terminal characteristics

Class Method Summary collapse

Class Method Details

.apply_width!(table) ⇒ Object

Apply detected width to a Terminal::Table instance when possible.



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# File 'lib/floss_funding/terminal_helpers.rb', line 45

def apply_width!(table)
  cols = columns
  table.style = {:width => cols} if cols && cols > 0
  table
rescue StandardError
  table
end

.columns ⇒ Object

Determine current terminal columns, checking tput each time for up-to-date size.
Returns an Integer or nil when unknown.



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# File 'lib/floss_funding/terminal_helpers.rb', line 10

def columns
  cols = nil
  # Prefer tput, over TTY::Screen.width (from the tty-screen gem), for cross-platform compatibility
  begin
    out = %x(tput cols 2>/dev/null).to_s.strip
    cols = Integer(out) unless out.empty?
  rescue StandardError
    # ignore
  end

  # Fallback to COLUMNS env
  if cols.nil? || cols <= 0
    begin
      env_cols = ENV["COLUMNS"]
      cols = Integer(env_cols) if env_cols && !env_cols.to_s.empty?
    rescue StandardError
      # ignore
    end
  end

  # Fallback to IO.console only if it looks like a TTY context
  if (cols.nil? || cols <= 0) && $stdout.tty?
    begin
      require "io/console"
      _, c = IO.console.winsize
      cols = c if c && c > 0
    rescue StandardError
      # ignore
    end
  end

  (cols.is_a?(Integer) && cols > 0) ? cols : nil
end