diff options
Diffstat (limited to 'lib/gitlab/ci/trace/stream.rb')
| -rw-r--r-- | lib/gitlab/ci/trace/stream.rb | 51 |
1 files changed, 28 insertions, 23 deletions
diff --git a/lib/gitlab/ci/trace/stream.rb b/lib/gitlab/ci/trace/stream.rb index fa462cbe095..c4c0623df6c 100644 --- a/lib/gitlab/ci/trace/stream.rb +++ b/lib/gitlab/ci/trace/stream.rb @@ -73,7 +73,7 @@ module Gitlab match = "" - stream.each_line do |line| + reverse_line do |line| matches = line.scan(regex) next unless matches.is_a?(Array) next if matches.empty? @@ -86,34 +86,39 @@ module Gitlab nil rescue # if bad regex or something goes wrong we dont want to interrupt transition - # so we just silentrly ignore error for now + # so we just silently ignore error for now end private - def read_last_lines(last_lines) - chunks = [] - pos = lines = 0 - max = stream.size - - # We want an extra line to make sure fist line has full contents - while lines <= last_lines && pos < max - pos += BUFFER_SIZE - - buf = - if pos <= max - stream.seek(-pos, IO::SEEK_END) - stream.read(BUFFER_SIZE) - else # Reached the head, read only left - stream.seek(0) - stream.read(BUFFER_SIZE - (pos - max)) - end - - lines += buf.count("\n") - chunks.unshift(buf) + def read_last_lines(limit) + to_enum(:reverse_line).first(limit).reverse.join + end + + def reverse_line + stream.seek(0, IO::SEEK_END) + debris = '' + + until (buf = read_backward(BUFFER_SIZE)).empty? + buf += debris + debris, *lines = buf.each_line.to_a + lines.reverse_each do |line| + yield(line.force_encoding('UTF-8')) + end end - chunks.join.lines.last(last_lines).join + yield(debris.force_encoding('UTF-8')) unless debris.empty? + end + + def read_backward(length) + cur_offset = stream.tell + start = cur_offset - length + start = 0 if start < 0 + + stream.seek(start, IO::SEEK_SET) + stream.read(cur_offset - start).tap do + stream.seek(start, IO::SEEK_SET) + end end end end |