Viewing file:  progress_stream.py (3.23 KB) -rw-r--r--
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from __future__ import absolute_import
from __future__ import unicode_literals
from compose import utils
class StreamOutputError(Exception):
pass
def write_to_stream(s, stream):
try:
stream.write(s)
except UnicodeEncodeError:
encoding = getattr(stream, 'encoding', 'ascii')
stream.write(s.encode(encoding, errors='replace').decode(encoding))
def stream_output(output, stream):
is_terminal = hasattr(stream, 'isatty') and stream.isatty()
stream = utils.get_output_stream(stream)
lines = {}
diff = 0
for event in utils.json_stream(output):
yield event
is_progress_event = 'progress' in event or 'progressDetail' in event
if not is_progress_event:
print_output_event(event, stream, is_terminal)
stream.flush()
continue
if not is_terminal:
continue
# if it's a progress event and we have a terminal, then display the progress bars
image_id = event.get('id')
if not image_id:
continue
if image_id not in lines:
lines[image_id] = len(lines)
write_to_stream("\n", stream)
diff = len(lines) - lines[image_id]
# move cursor up `diff` rows
write_to_stream("%c[%dA" % (27, diff), stream)
print_output_event(event, stream, is_terminal)
if 'id' in event:
# move cursor back down
write_to_stream("%c[%dB" % (27, diff), stream)
stream.flush()
def print_output_event(event, stream, is_terminal):
if 'errorDetail' in event:
raise StreamOutputError(event['errorDetail']['message'])
terminator = ''
if is_terminal and 'stream' not in event:
# erase current line
write_to_stream("%c[2K\r" % 27, stream)
terminator = "\r"
elif 'progressDetail' in event:
return
if 'time' in event:
write_to_stream("[%s] " % event['time'], stream)
if 'id' in event:
write_to_stream("%s: " % event['id'], stream)
if 'from' in event:
write_to_stream("(from %s) " % event['from'], stream)
status = event.get('status', '')
if 'progress' in event:
write_to_stream("%s %s%s" % (status, event['progress'], terminator), stream)
elif 'progressDetail' in event:
detail = event['progressDetail']
total = detail.get('total')
if 'current' in detail and total:
percentage = float(detail['current']) / float(total) * 100
write_to_stream('%s (%.1f%%)%s' % (status, percentage, terminator), stream)
else:
write_to_stream('%s%s' % (status, terminator), stream)
elif 'stream' in event:
write_to_stream("%s%s" % (event['stream'], terminator), stream)
else:
write_to_stream("%s%s\n" % (status, terminator), stream)
def get_digest_from_pull(events):
digest = None
for event in events:
status = event.get('status')
if not status or 'Digest' not in status:
continue
else:
digest = status.split(':', 1)[1].strip()
return digest
def get_digest_from_push(events):
for event in events:
digest = event.get('aux', {}).get('Digest')
if digest:
return digest
return None
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