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# Text progress bar library, like curl or scp.
import math
import sys
from datetime import datetime, timedelta
if sys.platform.startswith("win"):
from .terminal_win import Terminal
else:
from .terminal_unix import Terminal
class NullProgressBar(object):
def update(self, current, data):
pass
def poke(self):
pass
def finish(self, complete=True):
pass
def beginline(self):
pass
def message(self, msg):
sys.stdout.write(msg + "\n")
@staticmethod
def update_granularity():
return timedelta.max
class ProgressBar(object):
def __init__(self, limit, fmt):
assert self.conservative_isatty()
self.prior = None
self.atLineStart = True
# [{str:str}] Describtion of how to lay out each field in the counters map.
self.counters_fmt = fmt
# int: The value of 'current' equal to 100%.
self.limit = limit
# int: max digits in limit
self.limit_digits = int(math.ceil(math.log10(self.limit)))
# datetime: The start time.
self.t0 = datetime.now()
# datetime: Optional, the last time update() ran.
self.last_update_time = None
# Compute the width of the counters and build the format string.
self.counters_width = 1 # [
for layout in self.counters_fmt:
self.counters_width += self.limit_digits
# | (or ']' for the last one)
self.counters_width += 1
self.barlen = 64 - self.counters_width
@staticmethod
def update_granularity():
return timedelta(seconds=0.1)
def update(self, current, data):
# Record prior for poke.
self.prior = (current, data)
self.atLineStart = False
# Build counters string.
sys.stdout.write("\r[")
for layout in self.counters_fmt:
Terminal.set_color(layout["color"])
sys.stdout.write(
("{:" + str(self.limit_digits) + "d}").format(data[layout["value"]])
)
Terminal.reset_color()
if layout != self.counters_fmt[-1]:
sys.stdout.write("|")
else:
sys.stdout.write("] ")
# Build the bar.
pct = int(100.0 * current / self.limit)
sys.stdout.write("{:3d}% ".format(pct))
barlen = int(1.0 * self.barlen * current / self.limit) - 1
bar = "=" * barlen + ">" + " " * (self.barlen - barlen - 1)
sys.stdout.write(bar + "|")
# Update the bar.
now = datetime.now()
dt = now - self.t0
dt = dt.seconds + dt.microseconds * 1e-6
sys.stdout.write("{:6.1f}s".format(dt))
Terminal.clear_right()
# Force redisplay, since we didn't write a \n.
sys.stdout.flush()
self.last_update_time = now
def poke(self):
if not self.prior:
return
if datetime.now() - self.last_update_time < self.update_granularity():
return
self.update(*self.prior)
def finish(self, complete=True):
if not self.prior:
sys.stdout.write(
"No test run... You can try adding"
" --run-slow-tests or --run-skipped to run more tests\n"
)
return
final_count = self.limit if complete else self.prior[0]
self.update(final_count, self.prior[1])
sys.stdout.write("\n")
def beginline(self):
if not self.atLineStart:
sys.stdout.write("\n")
self.atLineStart = True
def message(self, msg):
self.beginline()
sys.stdout.write(msg)
sys.stdout.write("\n")
@staticmethod
def conservative_isatty():
"""
Prefer erring on the side of caution and not using terminal commands if
the current output stream may be a file. We explicitly check for the
Android platform because terminal commands work poorly over ADB's
redirection.
"""
try:
import android # NOQA: F401
return False
except ImportError:
return sys.stdout.isatty()
return False
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