62 lines
1.8 KiB
Ruby
62 lines
1.8 KiB
Ruby
class Pry
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# The History class is responsible for maintaining the user's input history, both
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# internally and within Readline::HISTORY.
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class History
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def initialize
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@history = []
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@saved_lines = 0
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end
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# Loads a file's contents into the input history.
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# @param [String] filename
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# @return [Integer] The number of lines loaded
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def load(filename)
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File.foreach(filename) do |line|
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Readline::HISTORY << line.chomp
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@history << line.chomp
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end
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@saved_lines = @history.length
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end
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# Appends input history from this session to a file.
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# @param [String] filename
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# @return [Integer] The number of lines saved
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def save(filename)
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history_to_save = @history[@saved_lines..-1]
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File.open(filename, 'a') do |f|
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history_to_save.each { |ln| f.puts ln }
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end
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@saved_lines = @history.length
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history_to_save.length
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end
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# Adds a line to the input history, ignoring blank and duplicate lines.
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# @param [String] line
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# @return [String] The same line that was passed in
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def push(line)
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unless line.empty? || (@history.last && line.strip == @history.last.strip)
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Readline::HISTORY << line
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@history << line
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end
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line
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end
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alias << push
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# Clears all history. Anything the user entered before this point won't be
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# saved, but anything they put in afterwards will still be appended to the
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# history file on exit.
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def clear
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Readline::HISTORY.shift until Readline::HISTORY.empty?
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@history = []
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@saved_lines = 0
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end
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# Returns an Array containing all stored history.
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# @return [Array<String>] An Array containing all lines of history loaded
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# or entered by the user in the current session.
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def to_a
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@history.dup
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end
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end
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end
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