Update progress to 1.5

news/6319.feature

@@ -0,0 +1 @@
+When downloading a package, the ETA and average speed now only update once per second for better legibility.

news/progress.vendor

@@ -0,0 +1 @@
+Update progress to 1.5

src/pip/_internal/utils/ui.py

@@ -8,8 +8,8 @@
 from signal import SIGINT, default_int_handler, signal
 
 from pip._vendor import six
+from pip._vendor.progress import HIDE_CURSOR, SHOW_CURSOR
 from pip._vendor.progress.bar import Bar, FillingCirclesBar, IncrementalBar
-from pip._vendor.progress.helpers import HIDE_CURSOR, SHOW_CURSOR, WritelnMixin
 from pip._vendor.progress.spinner import Spinner
 
 from pip._internal.utils.compat import WINDOWS
@@ -224,7 +224,7 @@ class DownloadBlueEmojiProgressBar(BaseDownloadProgressBar,  # type: ignore
 
 
 class DownloadProgressSpinner(WindowsMixin, InterruptibleMixin,
-                              DownloadProgressMixin, WritelnMixin, Spinner):
+                              DownloadProgressMixin, Spinner):
 
     file = sys.stdout
     suffix = "%(downloaded)s %(download_speed)s"

src/pip/_vendor/progress/__init__.py

@@ -12,73 +12,125 @@
 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
-from __future__ import division
+from __future__ import division, print_function
 
 from collections import deque
 from datetime import timedelta
 from math import ceil
 from sys import stderr
-from time import time
+try:
+    from time import monotonic
+except ImportError:
+    from time import time as monotonic
 
 
-__version__ = '1.4'
+__version__ = '1.5'
+
+HIDE_CURSOR = '\x1b[?25l'
+SHOW_CURSOR = '\x1b[?25h'
 
 
 class Infinite(object):
     file = stderr
     sma_window = 10         # Simple Moving Average window
+    check_tty = True
+    hide_cursor = True
 
-    def __init__(self, *args, **kwargs):
+    def __init__(self, message='', **kwargs):
         self.index = 0
-        self.start_ts = time()
+        self.start_ts = monotonic()
         self.avg = 0
+        self._avg_update_ts = self.start_ts
         self._ts = self.start_ts
         self._xput = deque(maxlen=self.sma_window)
         for key, val in kwargs.items():
             setattr(self, key, val)
 
+        self._width = 0
+        self.message = message
+
+        if self.file and self.is_tty():
+            if self.hide_cursor:
+                print(HIDE_CURSOR, end='', file=self.file)
+            print(self.message, end='', file=self.file)
+            self.file.flush()
+
     def __getitem__(self, key):
         if key.startswith('_'):
             return None
         return getattr(self, key, None)
 
     @property
     def elapsed(self):
-        return int(time() - self.start_ts)
+        return int(monotonic() - self.start_ts)
 
     @property
     def elapsed_td(self):
         return timedelta(seconds=self.elapsed)
 
     def update_avg(self, n, dt):
         if n > 0:
+            xput_len = len(self._xput)
             self._xput.append(dt / n)
-            self.avg = sum(self._xput) / len(self._xput)
+            now = monotonic()
+            # update when we're still filling _xput, then after every second
+            if (xput_len < self.sma_window or
+                    now - self._avg_update_ts > 1):
+                self.avg = sum(self._xput) / len(self._xput)
+                self._avg_update_ts = now
 
     def update(self):
         pass
 
     def start(self):
         pass
 
+    def clearln(self):
+        if self.file and self.is_tty():
+            print('\r\x1b[K', end='', file=self.file)
+
+    def write(self, s):
+        if self.file and self.is_tty():
+            line = self.message + s.ljust(self._width)
+            print('\r' + line, end='', file=self.file)
+            self._width = max(self._width, len(s))
+            self.file.flush()
+
+    def writeln(self, line):
+        if self.file and self.is_tty():
+            self.clearln()
+            print(line, end='', file=self.file)
+            self.file.flush()
+
     def finish(self):
-        pass
+        if self.file and self.is_tty():
+            print(file=self.file)
+            if self.hide_cursor:
+                print(SHOW_CURSOR, end='', file=self.file)
+
+    def is_tty(self):
+        return self.file.isatty() if self.check_tty else True
 
     def next(self, n=1):
-        now = time()
+        now = monotonic()
         dt = now - self._ts
         self.update_avg(n, dt)
         self._ts = now
         self.index = self.index + n
         self.update()
 
     def iter(self, it):
-        try:
+        with self:
             for x in it:
                 yield x
                 self.next()
-        finally:
-            self.finish()
+
+    def __enter__(self):
+        self.start()
+        return self
+
+    def __exit__(self, exc_type, exc_val, exc_tb):
+        self.finish()
 
 
 class Progress(Infinite):
@@ -119,9 +171,7 @@ def iter(self, it):
         except TypeError:
             pass
 
-        try:
+        with self:
             for x in it:
                 yield x
                 self.next()
-        finally:
-            self.finish()

src/pip/_vendor/progress/bar.py

@@ -19,18 +19,15 @@
 import sys
 
 from . import Progress
-from .helpers import WritelnMixin
 
 
-class Bar(WritelnMixin, Progress):
+class Bar(Progress):
     width = 32
-    message = ''
     suffix = '%(index)d/%(max)d'
     bar_prefix = ' |'
     bar_suffix = '| '
     empty_fill = ' '
     fill = '#'
-    hide_cursor = True
 
     def update(self):
         filled_length = int(self.width * self.progress)

src/pip/_vendor/progress/counter.py

@@ -16,27 +16,20 @@
 
 from __future__ import unicode_literals
 from . import Infinite, Progress
-from .helpers import WriteMixin
 
 
-class Counter(WriteMixin, Infinite):
-    message = ''
-    hide_cursor = True
-
+class Counter(Infinite):
     def update(self):
         self.write(str(self.index))
 
 
-class Countdown(WriteMixin, Progress):
-    hide_cursor = True
-
+class Countdown(Progress):
     def update(self):
         self.write(str(self.remaining))
 
 
-class Stack(WriteMixin, Progress):
+class Stack(Progress):
     phases = (' ', '▁', '▂', '▃', '▄', '▅', '▆', '▇', '█')
-    hide_cursor = True
 
     def update(self):
         nphases = len(self.phases)

src/pip/_vendor/progress/spinner.py

@@ -16,11 +16,9 @@
 
 from __future__ import unicode_literals
 from . import Infinite
-from .helpers import WriteMixin
 
 
-class Spinner(WriteMixin, Infinite):
-    message = ''
+class Spinner(Infinite):
     phases = ('-', '\\', '|', '/')
     hide_cursor = True
 
@@ -40,5 +38,6 @@ class MoonSpinner(Spinner):
 class LineSpinner(Spinner):
     phases = ['⎺', '⎻', '⎼', '⎽', '⎼', '⎻']
 
+
 class PixelSpinner(Spinner):
-    phases = ['⣾','⣷', '⣯', '⣟', '⡿', '⢿', '⣻', '⣽']
+    phases = ['⣾', '⣷', '⣯', '⣟', '⡿', '⢿', '⣻', '⣽']

src/pip/_vendor/vendor.txt

@@ -9,7 +9,7 @@ lockfile==0.12.2
 msgpack==0.5.6
 packaging==19.0
 pep517==0.5.0
-progress==1.4
+progress==1.5
 pyparsing==2.3.1
 pytoml==0.1.20
 requests==2.21.0