Viewing file:  progress_bars.py (2.65 KB) -rw-r--r--
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import functools
import sys
from typing import Callable, Generator, Iterable, Iterator, Optional, Tuple
from pip._vendor.rich.progress import (
BarColumn,
DownloadColumn,
FileSizeColumn,
Progress,
ProgressColumn,
SpinnerColumn,
TextColumn,
TimeElapsedColumn,
TimeRemainingColumn,
TransferSpeedColumn,
)
from pip._internal.cli.spinners import RateLimiter
from pip._internal.utils.logging import get_indentation
DownloadProgressRenderer = Callable[[Iterable[bytes]], Iterator[bytes]]
def _rich_progress_bar(
iterable: Iterable[bytes],
*,
bar_type: str,
size: Optional[int],
) -> Generator[bytes, None, None]:
assert bar_type == "on", "This should only be used in the default mode."
if not size:
total = float("inf")
columns: Tuple[ProgressColumn, ...] = (
TextColumn("[progress.description]{task.description}"),
SpinnerColumn("line", speed=1.5),
FileSizeColumn(),
TransferSpeedColumn(),
TimeElapsedColumn(),
)
else:
total = size
columns = (
TextColumn("[progress.description]{task.description}"),
BarColumn(),
DownloadColumn(),
TransferSpeedColumn(),
TextColumn("eta"),
TimeRemainingColumn(),
)
progress = Progress(*columns, refresh_per_second=5)
task_id = progress.add_task(" " * (get_indentation() + 2), total=total)
with progress:
for chunk in iterable:
yield chunk
progress.update(task_id, advance=len(chunk))
def _raw_progress_bar(
iterable: Iterable[bytes],
*,
size: Optional[int],
) -> Generator[bytes, None, None]:
def write_progress(current: int, total: int) -> None:
sys.stdout.write(f"Progress {current} of {total}\n")
sys.stdout.flush()
current = 0
total = size or 0
rate_limiter = RateLimiter(0.25)
write_progress(current, total)
for chunk in iterable:
current += len(chunk)
if rate_limiter.ready() or current == total:
write_progress(current, total)
rate_limiter.reset()
yield chunk
def get_download_progress_renderer(
*, bar_type: str, size: Optional[int] = None
) -> DownloadProgressRenderer:
"""Get an object that can be used to render the download progress.
Returns a callable, that takes an iterable to "wrap".
"""
if bar_type == "on":
return functools.partial(_rich_progress_bar, bar_type=bar_type, size=size)
elif bar_type == "raw":
return functools.partial(_raw_progress_bar, size=size)
else:
return iter # no-op, when passed an iterator
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