129 lines
3.2 KiB
Ruby
129 lines
3.2 KiB
Ruby
module Gitlab
|
|
module Git
|
|
class DiffCollection
|
|
include Enumerable
|
|
|
|
DEFAULT_LIMITS = { max_files: 100, max_lines: 5000 }.freeze
|
|
|
|
def initialize(iterator, options = {})
|
|
@iterator = iterator
|
|
@max_files = options.fetch(:max_files, DEFAULT_LIMITS[:max_files])
|
|
@max_lines = options.fetch(:max_lines, DEFAULT_LIMITS[:max_lines])
|
|
@max_bytes = @max_files * 5120 # Average 5 KB per file
|
|
@safe_max_files = [@max_files, DEFAULT_LIMITS[:max_files]].min
|
|
@safe_max_lines = [@max_lines, DEFAULT_LIMITS[:max_lines]].min
|
|
@safe_max_bytes = @safe_max_files * 5120 # Average 5 KB per file
|
|
@all_diffs = !!options.fetch(:all_diffs, false)
|
|
@no_collapse = !!options.fetch(:no_collapse, true)
|
|
@deltas_only = !!options.fetch(:deltas_only, false)
|
|
|
|
@line_count = 0
|
|
@byte_count = 0
|
|
@overflow = false
|
|
@array = Array.new
|
|
end
|
|
|
|
def each(&block)
|
|
if @populated
|
|
# @iterator.each is slower than just iterating the array in place
|
|
@array.each(&block)
|
|
elsif @deltas_only
|
|
each_delta(&block)
|
|
else
|
|
each_patch(&block)
|
|
end
|
|
end
|
|
|
|
def empty?
|
|
!@iterator.any?
|
|
end
|
|
|
|
def overflow?
|
|
populate!
|
|
!!@overflow
|
|
end
|
|
|
|
def size
|
|
@size ||= count # forces a loop using each method
|
|
end
|
|
|
|
def real_size
|
|
populate!
|
|
|
|
if @overflow
|
|
"#{size}+"
|
|
else
|
|
size.to_s
|
|
end
|
|
end
|
|
|
|
def decorate!
|
|
collection = each_with_index do |element, i|
|
|
@array[i] = yield(element)
|
|
end
|
|
@populated = true
|
|
collection
|
|
end
|
|
|
|
private
|
|
|
|
def populate!
|
|
return if @populated
|
|
|
|
each { nil } # force a loop through all diffs
|
|
@populated = true
|
|
nil
|
|
end
|
|
|
|
def over_safe_limits?(files)
|
|
files >= @safe_max_files || @line_count > @safe_max_lines || @byte_count >= @safe_max_bytes
|
|
end
|
|
|
|
def each_delta
|
|
@iterator.each_delta.with_index do |delta, i|
|
|
diff = Gitlab::Git::Diff.new(delta)
|
|
|
|
yield @array[i] = diff
|
|
end
|
|
end
|
|
|
|
def each_patch
|
|
@iterator.each_with_index do |raw, i|
|
|
# First yield cached Diff instances from @array
|
|
if @array[i]
|
|
yield @array[i]
|
|
next
|
|
end
|
|
|
|
# We have exhausted @array, time to create new Diff instances or stop.
|
|
break if @overflow
|
|
|
|
if !@all_diffs && i >= @max_files
|
|
@overflow = true
|
|
break
|
|
end
|
|
|
|
collapse = !@all_diffs && !@no_collapse
|
|
|
|
diff = Gitlab::Git::Diff.new(raw, collapse: collapse)
|
|
|
|
if collapse && over_safe_limits?(i)
|
|
diff.prune_collapsed_diff!
|
|
end
|
|
|
|
@line_count += diff.line_count
|
|
@byte_count += diff.diff.bytesize
|
|
|
|
if !@all_diffs && (@line_count >= @max_lines || @byte_count >= @max_bytes)
|
|
# This last Diff instance pushes us over the lines limit. We stop and
|
|
# discard it.
|
|
@overflow = true
|
|
break
|
|
end
|
|
|
|
yield @array[i] = diff
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|