Module: Hirb::Util
Overview
Group of handy utility functions used throughout Hirb.
Instance Method Summary collapse
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#any_const_get(name) ⇒ Object
Returns a constant like Module#const_get no matter what namespace it’s nested in.
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#camelize(string) ⇒ Object
From Rails ActiveSupport, converting undescored lowercase to camel uppercase.
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#capture_stdout(&block) ⇒ Object
Captures STDOUT of anything run in its block and returns it as string.
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#choose_from_array(array, input, options = {}) ⇒ Object
Used by Hirb::Menu to select items from an array.
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#command_exists?(command) ⇒ Boolean
Determines if a shell command exists by searching for it in ENV.
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#detect_terminal_size ⇒ Object
Returns [width, height] of terminal when detected, nil if not detected.
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#find_home ⇒ Object
From Rubygems, determine a user’s home.
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#recursive_hash_merge(hash1, hash2) ⇒ Object
Recursively merge hash1 with hash2.
Instance Method Details
#any_const_get(name) ⇒ Object
Returns a constant like Module#const_get no matter what namespace it’s nested in. Returns nil if the constant is not found.
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# File 'lib/hirb/util.rb', line 7 def any_const_get(name) return name if name.is_a?(Module) begin klass = Object name.split('::').each {|e| klass = klass.const_get(e) } klass rescue nil end end |
#camelize(string) ⇒ Object
From Rails ActiveSupport, converting undescored lowercase to camel uppercase.
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# File 'lib/hirb/util.rb', line 26 def camelize(string) string.to_s.gsub(/\/(.?)/) { "::#{$1.upcase}" }.gsub(/(?:^|_)(.)/) { $1.upcase } end |
#capture_stdout(&block) ⇒ Object
Captures STDOUT of anything run in its block and returns it as string.
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# File 'lib/hirb/util.rb', line 76 def capture_stdout(&block) original_stdout = $stdout $stdout = fake = StringIO.new begin yield ensure $stdout = original_stdout end fake.string end |
#choose_from_array(array, input, options = {}) ⇒ Object
Used by Hirb::Menu to select items from an array. Array counting starts at 1. Ranges of numbers are specified with a ‘-’ or ‘..’. Multiple ranges can be comma delimited. Anything that isn’t a valid number is ignored. All elements can be returned with a ‘*’. Examples:
1-3,5-6 -> [1,2,3,5,6]
* -> all elements in array
'' -> []
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# File 'lib/hirb/util.rb', line 36 def choose_from_array(array, input, ={}) = {:splitter=>","}.merge() return array if input[/^\s*\*/] result = [] input.split([:splitter]).each do |e| if e =~ /-|\.\./ min,max = e.split(/-|\.\./) slice_min = min.to_i - 1 result.push(*array.slice(slice_min, max.to_i - min.to_i + 1)) elsif e =~ /\s*(\d+)\s*/ index = $1.to_i - 1 next if index < 0 result.push(array[index]) if array[index] end end result end |
#command_exists?(command) ⇒ Boolean
Determines if a shell command exists by searching for it in ENV.
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# File 'lib/hirb/util.rb', line 55 def command_exists?(command) ENV['PATH'].split(File::PATH_SEPARATOR).any? {|d| File.exist? File.join(d, command) } end |
#detect_terminal_size ⇒ Object
Returns [width, height] of terminal when detected, nil if not detected. Think of this as a simpler version of Highline’s Highline::SystemExtensions.terminal_size()
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# File 'lib/hirb/util.rb', line 61 def detect_terminal_size if (ENV['COLUMNS'] =~ /^\d+$/) && (ENV['LINES'] =~ /^\d+$/) [ENV['COLUMNS'].to_i, ENV['LINES'].to_i] elsif (RUBY_PLATFORM =~ /java/ || (!STDIN.tty? && ENV['TERM'])) && command_exists?('tput') [`tput cols`.to_i, `tput lines`.to_i] elsif STDIN.tty? && command_exists?('stty') `stty size`.scan(/\d+/).map { |s| s.to_i }.reverse else nil end rescue nil end |
#find_home ⇒ Object
From Rubygems, determine a user’s home.
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# File 'lib/hirb/util.rb', line 88 def find_home ['HOME', 'USERPROFILE'].each {|e| return ENV[e] if ENV[e] } return "#{ENV['HOMEDRIVE']}#{ENV['HOMEPATH']}" if ENV['HOMEDRIVE'] && ENV['HOMEPATH'] File.("~") rescue File::ALT_SEPARATOR ? "C:/" : "/" end |
#recursive_hash_merge(hash1, hash2) ⇒ Object
Recursively merge hash1 with hash2.
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# File 'lib/hirb/util.rb', line 21 def recursive_hash_merge(hash1, hash2) hash1.merge(hash2) {|k,o,n| (o.is_a?(Hash)) ? recursive_hash_merge(o,n) : n} end |