$ cat > loop.py <<EOF

  > from mercurial import commands

  > 

  > def loop(ui, loops, **opts):

  >     loops = int(loops)

  >     total = None

  >     if loops >= 0:

  >         total = loops

  >     if opts.get('total', None):

  >         total = int(opts.get('total'))

  >     loops = abs(loops)

  > 

  >     for i in range(loops):

  >         ui.progress('loop', i, 'loop.%d' % i, 'loopnum', total)

  >     ui.progress('loop', None, 'loop.done', 'loopnum', total)

  > 

  > commands.norepo += " loop"

  > 

  > cmdtable = {

  >     "loop": (loop, [('', 'total', '', 'override for total')],

  >              'hg loop LOOPS'),

  > }

  > EOF

  $ echo "[extensions]" >> $HGRCPATH

  $ echo "progress=" >> $HGRCPATH

  $ echo "loop=`pwd`/loop.py" >> $HGRCPATH

  $ echo "[progress]" >> $HGRCPATH

  $ echo  "format = topic bar number" >> $HGRCPATH

  $ echo "assume-tty=1" >> $HGRCPATH

  $ echo "width=60" >> $HGRCPATH

test default params, display nothing because of delay

  $ hg -y loop 3 2>&1 | $TESTDIR/filtercr.py

  $ echo "delay=0" >> $HGRCPATH

  $ echo "refresh=0" >> $HGRCPATH

test with delay=0, refresh=0

  $ hg -y loop 3 2>&1 | $TESTDIR/filtercr.py

  loop [                                                ] 0/3

  loop [===============>                                ] 1/3

  loop [===============================>                ] 2/3

                                                              \r (esc)

test refresh is taken in account

  $ hg -y --config progress.refresh=100 loop 3 2>&1 | $TESTDIR/filtercr.py

test format options 1

  $ hg -y --config 'progress.format=number topic item+2' loop 2 2>&1 \

  > | $TESTDIR/filtercr.py

  0/2 loop lo

  1/2 loop lo

                                                              \r (esc)

test format options 2

  $ hg -y --config 'progress.format=number item-3 bar' loop 2 2>&1 \

  > | $TESTDIR/filtercr.py

  0/2 p.0 [                                                 ]

  1/2 p.1 [=======================>                         ]

                                                              \r (esc)

test format options and indeterminate progress

  $ hg -y --config 'progress.format=number item bar' loop -- -2 2>&1 \

  > | $TESTDIR/filtercr.py

  0 loop.0               [ <=>                              ]

  1 loop.1               [  <=>                             ]

                                                              \r (esc)

make sure things don't fall over if count > total

  $ hg -y loop --total 4 6 2>&1 | $TESTDIR/filtercr.py

  loop [                                                ] 0/4

  loop [===========>                                    ] 1/4

  loop [=======================>                        ] 2/4

  loop [===================================>            ] 3/4

  loop [===============================================>] 4/4

  loop [ <=>                                            ] 5/4

                                                              \r (esc)

test immediate progress completion

  $ hg -y loop 0 2>&1 | $TESTDIR/filtercr.py

test delay time estimates

  $ cat > mocktime.py <<EOF

  > import os

  > import time

  > 

  > class mocktime(object):

  >     def __init__(self, increment):

  >         self.time = 0

  >         self.increment = increment

  >     def __call__(self):

  >         self.time += self.increment

  >         return self.time

  > 

  > def uisetup(ui):

  >     time.time = mocktime(int(os.environ.get('MOCKTIME', '11')))

  > EOF

  $ echo "[extensions]" > $HGRCPATH

  $ echo "mocktime=`pwd`/mocktime.py" >> $HGRCPATH

  $ echo "progress=" >> $HGRCPATH

  $ echo "loop=`pwd`/loop.py" >> $HGRCPATH

  $ echo "[progress]" >> $HGRCPATH

  $ echo "assume-tty=1" >> $HGRCPATH

  $ echo "delay=25" >> $HGRCPATH

  $ echo "width=60" >> $HGRCPATH

  $ hg -y loop 8 2>&1 | python $TESTDIR/filtercr.py

  loop [=========>                                ] 2/8 1m07s

  loop [===============>                            ] 3/8 56s

  loop [=====================>                      ] 4/8 45s

  loop [==========================>                 ] 5/8 34s

  loop [================================>           ] 6/8 23s

  loop [=====================================>      ] 7/8 12s

                                                              \r (esc)

  $ MOCKTIME=10000 hg -y loop 4 2>&1 | python $TESTDIR/filtercr.py

  loop [                                                ] 0/4

  loop [=========>                                ] 1/4 8h21m

  loop [====================>                     ] 2/4 5h34m

  loop [==============================>           ] 3/4 2h47m

                                                              \r (esc)

  $ MOCKTIME=1000000 hg -y loop 4 2>&1 | python $TESTDIR/filtercr.py

  loop [                                                ] 0/4

  loop [=========>                                ] 1/4 5w00d

  loop [====================>                     ] 2/4 3w03d

  loop [=============================>           ] 3/4 11d14h

                                                              \r (esc)

  $ MOCKTIME=14000000 hg -y loop 4 2>&1 | python $TESTDIR/filtercr.py

  loop [                                                ] 0/4

  loop [=========>                                ] 1/4 1y18w

  loop [===================>                     ] 2/4 46w03d

  loop [=============================>           ] 3/4 23w02d

                                                              \r (esc)

Time estimates should not fail when there's no end point:

  $ hg -y loop -- -4 2>&1 | python $TESTDIR/filtercr.py

  loop [ <=>                                              ] 2

  loop [  <=>                                             ] 3

                                                              \r (esc)