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# frozen_string_literal: true
module Byebug
module Helpers
#
# Utilities for interaction with files
#
module FileHelper
#
# Reads lines of source file +filename+ into an array
#
def get_lines(filename)
File.foreach(filename).reduce([]) { |acc, elem| acc << elem.chomp }
end
#
# Reads line number +lineno+ from file named +filename+
#
def get_line(filename, lineno)
File.open(filename) do |f|
f.gets until f.lineno == lineno - 1
f.gets
end
end
#
# Returns the number of lines in file +filename+ in a portable,
# one-line-at-a-time way.
#
def n_lines(filename)
File.foreach(filename).reduce(0) { |acc, _elem| acc + 1 }
end
#
# Regularize file name.
#
def normalize(filename)
return filename if virtual_file?(filename)
return File.basename(filename) if Setting[:basename]
File.exist?(filename) ? File.realpath(filename) : filename
end
#
# A short version of a long path
#
def shortpath(fullpath)
components = Pathname(fullpath).each_filename.to_a
return fullpath if components.size <= 2
File.join("...", components[-3..-1])
end
#
# True for special files like -e, false otherwise
#
def virtual_file?(name)
if Gem.ruby_version >= Gem::Version.new("3.3.a")
["(irb)", "-e", "(byebug)"].include?(name) || name.start_with?("(eval ")
else
["(irb)", "-e", "(byebug)", "(eval)"].include?(name)
end
end
end
end
end
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