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# frozen_string_literal: true
module SyntaxSuggest
# Converts a SyntaxError message to a path
#
# Handles the case where the filename has a colon in it
# such as on a windows file system: https://github.com/ruby/syntax_suggest/issues/111
#
# Example:
#
# message = "/tmp/scratch:2:in `require_relative': /private/tmp/bad.rb:1: syntax error, unexpected `end' (SyntaxError)"
# puts PathnameFromMessage.new(message).call.name
# # => "/tmp/scratch.rb"
#
class PathnameFromMessage
EVAL_RE = /^\(eval.*\):\d+/
STREAMING_RE = /^-:\d+/
attr_reader :name
def initialize(message, io: $stderr)
@line = message.lines.first
@parts = @line.split(":")
@guess = []
@name = nil
@io = io
end
def call
if skip_missing_file_name?
if ENV["SYNTAX_SUGGEST_DEBUG"]
@io.puts "SyntaxSuggest: Could not find filename from #{@line.inspect}"
end
else
until stop?
@guess << @parts.shift
@name = Pathname(@guess.join(":"))
end
if @parts.empty?
@io.puts "SyntaxSuggest: Could not find filename from #{@line.inspect}"
@name = nil
end
end
self
end
def stop?
return true if @parts.empty?
return false if @guess.empty?
@name&.exist?
end
def skip_missing_file_name?
@line.match?(EVAL_RE) || @line.match?(STREAMING_RE)
end
end
end