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console.py
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console.py
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from __future__ import print_function, division, absolute_import
import sys
import json
import logging
import contextlib
from conda.utils import memoized
from conda.progressbar import (Bar, ETA, FileTransferSpeed, Percentage,
ProgressBar)
fetch_progress = ProgressBar(
widgets=['', ' ', Percentage(), ' ', Bar(), ' ', ETA(), ' ',
FileTransferSpeed()])
progress = ProgressBar(widgets=['', ' ', Bar(), ' ', Percentage()])
class FetchProgressHandler(logging.Handler):
def emit(self, record):
if record.name == 'fetch.start':
filename, maxval = record.msg
fetch_progress.widgets[0] = filename
fetch_progress.maxval = maxval
fetch_progress.start()
elif record.name == 'fetch.update':
n = record.msg
fetch_progress.update(n)
elif record.name == 'fetch.stop':
fetch_progress.finish()
class ProgressHandler(logging.Handler):
def emit(self, record):
if record.name == 'progress.start':
progress.maxval = record.msg
progress.start()
elif record.name == 'progress.update':
name, n = record.msg
progress.widgets[0] = '[%-20s]' % name
progress.update(n)
elif record.name == 'progress.stop':
progress.widgets[0] = '[ COMPLETE ]'
progress.finish()
class JsonFetchProgressHandler(logging.Handler):
def emit(self, record):
if record.name == 'fetch.start':
filename, maxval = record.msg
print(json.dumps({
'fetch': filename,
'maxval': maxval,
'progress': 0,
'finished': False
}))
print('\0', end='')
sys.stdout.flush()
self.filename = filename
self.maxval = maxval
elif record.name == 'fetch.update':
n = record.msg
print(json.dumps({
'fetch': self.filename,
'maxval': self.maxval,
'progress': n,
'finished': False
}))
print('\0', end='')
sys.stdout.flush()
elif record.name == 'fetch.stop':
print(json.dumps({
'fetch': self.filename,
'maxval': self.maxval,
'progress': self.maxval,
'finished': True
}))
print('\0', end='')
sys.stdout.flush()
self.filename = None
self.maxval = -1
class JsonProgressHandler(logging.Handler):
def emit(self, record):
if record.name == 'progress.start':
maxval = record.msg
print(json.dumps({
'maxval': maxval,
'progress': 0,
'finished': False
}))
print('\0', end='')
sys.stdout.flush()
self.maxval = maxval
elif record.name == 'progress.update':
name, n = record.msg
print(json.dumps({
'name': name,
'maxval': self.maxval,
'progress': n,
'finished': False
}))
print('\0', end='')
sys.stdout.flush()
elif record.name == 'progress.stop':
print(json.dumps({
'maxval': self.maxval,
'progress': self.maxval,
'finished': True
}))
print('\0', end='')
sys.stdout.flush()
class PrintHandler(logging.Handler):
def emit(self, record):
if record.name == 'print':
print(record.msg)
class DotHandler(logging.Handler):
def emit(self, record):
try:
sys.stdout.write('.')
sys.stdout.flush()
except IOError:
# sys.stdout.flush doesn't work in pythonw
pass
class SysStdoutWriteHandler(logging.Handler):
def emit(self, record):
try:
sys.stdout.write(record.msg)
sys.stdout.flush()
except IOError:
pass
class SysStderrWriteHandler(logging.Handler):
def emit(self, record):
try:
sys.stderr.write(record.msg)
sys.stderr.flush()
except IOError:
pass
_fetch_prog_handler = FetchProgressHandler()
_prog_handler = ProgressHandler()
@memoized # to avoid setting up handlers more than once
def setup_verbose_handlers():
fetch_prog_logger = logging.getLogger('fetch')
fetch_prog_logger.setLevel(logging.INFO)
fetch_prog_logger.addHandler(_fetch_prog_handler)
prog_logger = logging.getLogger('progress')
prog_logger.setLevel(logging.INFO)
prog_logger.addHandler(_prog_handler)
print_logger = logging.getLogger('print')
print_logger.setLevel(logging.INFO)
print_logger.addHandler(PrintHandler())
@contextlib.contextmanager
def json_progress_bars():
setup_verbose_handlers()
fetch_prog_logger = logging.getLogger('fetch')
prog_logger = logging.getLogger('progress')
print_logger = logging.getLogger('print')
# Disable this. Presumably this function is being used in a CLI context
# with --json, so we don't want the logger enabled (but we just
# activated it)
print_logger.setLevel(logging.CRITICAL + 1)
json_fetch_prog_handler = JsonFetchProgressHandler()
json_prog_handler = JsonProgressHandler()
fetch_prog_logger.removeHandler(_fetch_prog_handler)
prog_logger.removeHandler(_prog_handler)
fetch_prog_logger.addHandler(json_fetch_prog_handler)
prog_logger.addHandler(json_prog_handler)
yield
fetch_prog_logger.removeHandler(json_fetch_prog_handler)
prog_logger.removeHandler(json_prog_handler)
fetch_prog_logger.addHandler(_fetch_prog_handler)
prog_logger.addHandler(_prog_handler)
@memoized
def setup_handlers():
dotlogger = logging.getLogger('dotupdate')
dotlogger.setLevel(logging.DEBUG)
dotlogger.addHandler(DotHandler())
stdoutlogger = logging.getLogger('stdoutlog')
stdoutlogger.setLevel(logging.DEBUG)
stdoutlogger.addHandler(SysStdoutWriteHandler())
stderrlogger = logging.getLogger('stderrlog')
stderrlogger.setLevel(logging.DEBUG)
stderrlogger.addHandler(SysStderrWriteHandler())