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Contents
module Raven
class LineCache
def initialize
@cache = {}
end
# Any linecache you provide to Raven must implement this method.
# Returns an Array of Strings representing the lines in the source
# file. The number of lines retrieved is (2 * context) + 1, the middle
# line should be the line requested by lineno. See specs for more information.
def get_file_context(filename, lineno, context)
return nil, nil, nil unless valid_path?(filename)
lines = Array.new(2 * context + 1) do |i|
getline(filename, lineno - context + i)
end
[lines[0..(context - 1)], lines[context], lines[(context + 1)..-1]]
end
private
def valid_path?(path)
lines = getlines(path)
!lines.nil?
end
def getlines(path)
@cache[path] ||= begin
IO.readlines(path)
rescue
nil
end
end
def getline(path, n)
return nil if n < 1
lines = getlines(path)
return nil if lines.nil?
lines[n - 1]
end
end
end
Version data entries
31 entries across 31 versions & 3 rubygems