py3: make stdout line-buffered if connected to a TTY
Status messages that are to be shown on the terminal should be written to the
file descriptor before anything further is done, to keep the user updated.
One common way to achieve this is to make stdout line-buffered if it is
connected to a TTY. This is done on Python 2 (except on Windows, where libc,
which the CPython 2 streams depend on, does not properly support this).
Python 3 rolls it own I/O streams. On Python 3, buffered binary streams can't be
set line-buffered. The previous code (added in
227ba1afcb65) incorrectly
assumed that on Python 3, pycompat.stdout (sys.stdout.buffer) is already
line-buffered. However the interpreter initializes it with a block-buffered
stream or an unbuffered stream (when the -u option or the PYTHONUNBUFFERED
environment variable is set), never with a line-buffered stream.
One example where the current behavior is unacceptable is when running
`hg pull https://www.mercurial-scm.org/repo/hg` on Python 3, where the line
"pulling from https://www.mercurial-scm.org/repo/hg" does not appear on the
terminal before the hg process blocks while waiting for the server.
Various approaches to fix this problem are possible, including:
1. Weaken the contract of procutil.stdout to not give any guarantees about
buffering behavior. In this case, users of procutil.stdout need to be
changed to do enough flushes. In particular,
1. either ui must insert enough flushes for ui.write() and friends, or
2. ui.write() and friends get split into flushing and fully buffered
methods, or
3. users of ui.write() and friends must flush explicitly.
2. Make stdout unbuffered.
3. Make stdout line-buffered. Since Python 3 does not natively support that for
binary streams, we must implement it ourselves.
(2.) is problematic because using unbuffered I/O changes the performance
characteristics significantly compared to line-buffered (which is used on
Python 2) and this would be a regression.
(1.2.) and (1.3) are a substantial amount of work. It’s unclear whether the
added complexity would be justified, given that raw performance doesn’t matter
that much when writing to a terminal much faster than the user could read it.
(1.1.) pushes complexity into the ui class instead of separating the concern of
how stdout is buffered. Other users of procutil.stdout would still need to take
care of the flushes.
This patch implements (3.). The general performance considerations are very
similar to (1.1.). The extra method invocation and method forwarding add a
little more overhead if the class is used. In exchange, it doesn’t add overhead
if not used.
For the benchmarks, I compared the previous implementation (incorrect on Python
3), (1.1.), (3.) and (2.). The command was chosen so that the streams were
configured as if they were writing to a TTY, but actually write to a pager,
which is also the default:
HGRCPATH=/dev/null python3 ./hg --cwd ~/vcs/mozilla-central --time --pager yes --config pager.pager='cat > /dev/null' status --all
previous:
time: real 7.880 secs (user 7.290+0.050 sys 0.580+0.170)
time: real 7.830 secs (user 7.220+0.070 sys 0.590+0.140)
time: real 7.800 secs (user 7.210+0.050 sys 0.570+0.170)
(1.1.) using Yuya Nishihara’s patch:
time: real 9.860 secs (user 8.670+0.350 sys 1.160+0.830)
time: real 9.540 secs (user 8.430+0.370 sys 1.100+0.770)
time: real 9.830 secs (user 8.630+0.370 sys 1.180+0.840)
(3.) using this patch:
time: real 9.580 secs (user 8.480+0.350 sys 1.090+0.770)
time: real 9.670 secs (user 8.480+0.330 sys 1.170+0.860)
time: real 9.640 secs (user 8.500+0.350 sys 1.130+0.810)
(2.) using a previous patch by me:
time: real 10.480 secs (user 8.850+0.720 sys 1.590+1.500)
time: real 10.490 secs (user 8.750+0.750 sys 1.710+1.470)
time: real 10.240 secs (user 8.600+0.700 sys 1.590+1.510)
As expected, there’s no difference on Python 2, as exactly the same code paths
are used:
previous:
time: real 6.950 secs (user 5.870+0.330 sys 1.070+0.770)
time: real 7.040 secs (user 6.040+0.360 sys 0.980+0.750)
time: real 7.070 secs (user 5.950+0.360 sys 1.100+0.760)
this patch:
time: real 7.010 secs (user 5.900+0.390 sys 1.070+0.730)
time: real 7.000 secs (user 5.850+0.350 sys 1.120+0.760)
time: real 7.000 secs (user 5.790+0.380 sys 1.170+0.710)
# The tests in test-bisect are done on a linear history. Here the
# following repository history is used for testing:
#
# 17
# |
# 18 16
# \ /
# 15
# / \
# / \
# 10 13
# / \ |
# / \ | 14
# 7 6 9 12 /
# \ / \ | |/
# 4 \ | 11
# \ \ | /
# 3 5 | /
# \ / |/
# 2 8
# \ /
# 1
# |
# 0
init
$ hg init
committing changes
$ echo > a
$ echo '0' >> a
$ hg add a
$ hg ci -m "0" -d "0 0"
$ echo '1' >> a
$ hg ci -m "1" -d "1 0"
$ echo '2' >> a
$ hg ci -m "2" -d "2 0"
$ echo '3' >> a
$ hg ci -m "3" -d "3 0"
$ echo '4' >> a
$ hg ci -m "4" -d "4 0"
create branch
$ hg up -r 2
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo '5' >> b
$ hg add b
$ hg ci -m "5" -d "5 0"
created new head
merge
$ hg merge
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ hg ci -m "merge 4,5" -d "6 0"
create branch
$ hg up -r 4
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ echo '7' > c
$ hg add c
$ hg ci -m "7" -d "7 0"
created new head
create branch
$ hg up -r 1
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ echo '8' > d
$ hg add d
$ hg ci -m "8" -d "8 0"
created new head
$ echo '9' >> d
$ hg ci -m "9" -d "9 0"
merge
$ hg merge -r 6
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ hg ci -m "merge 6,9" -d "10 0"
create branch
$ hg up -r 8
2 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ echo '11' > e
$ hg add e
$ hg ci -m "11" -d "11 0"
created new head
$ echo '12' >> e
$ hg ci -m "12" -d "12 0"
$ echo '13' >> e
$ hg ci -m "13" -d "13 0"
create branch
$ hg up -r 11
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo '14' > f
$ hg add f
$ hg ci -m "14" -d "14 0"
created new head
merge
$ hg up -r 13 -C
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg merge -r 10
3 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)
$ hg ci -m "merge 10,13" -d "15 0"
$ echo '16' >> e
$ hg ci -m "16" -d "16 0"
$ echo '17' >> e
$ hg ci -m "17" -d "17 0"
create branch
$ hg up -r 15
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo '18' >> e
$ hg ci -m "18" -d "18 0"
created new head
log
$ hg log
changeset: 18:d42e18c7bc9b
tag: tip
parent: 15:857b178a7cf3
user: test
date: Thu Jan 01 00:00:18 1970 +0000
summary: 18
changeset: 17:228c06deef46
user: test
date: Thu Jan 01 00:00:17 1970 +0000
summary: 17
changeset: 16:609d82a7ebae
user: test
date: Thu Jan 01 00:00:16 1970 +0000
summary: 16
changeset: 15:857b178a7cf3
parent: 13:b0a32c86eb31
parent: 10:429fcd26f52d
user: test
date: Thu Jan 01 00:00:15 1970 +0000
summary: merge 10,13
changeset: 14:faa450606157
parent: 11:82ca6f06eccd
user: test
date: Thu Jan 01 00:00:14 1970 +0000
summary: 14
changeset: 13:b0a32c86eb31
user: test
date: Thu Jan 01 00:00:13 1970 +0000
summary: 13
changeset: 12:9f259202bbe7
user: test
date: Thu Jan 01 00:00:12 1970 +0000
summary: 12
changeset: 11:82ca6f06eccd
parent: 8:dab8161ac8fc
user: test
date: Thu Jan 01 00:00:11 1970 +0000
summary: 11
changeset: 10:429fcd26f52d
parent: 9:3c77083deb4a
parent: 6:a214d5d3811a
user: test
date: Thu Jan 01 00:00:10 1970 +0000
summary: merge 6,9
changeset: 9:3c77083deb4a
user: test
date: Thu Jan 01 00:00:09 1970 +0000
summary: 9
changeset: 8:dab8161ac8fc
parent: 1:4ca5088da217
user: test
date: Thu Jan 01 00:00:08 1970 +0000
summary: 8
changeset: 7:50c76098bbf2
parent: 4:5c668c22234f
user: test
date: Thu Jan 01 00:00:07 1970 +0000
summary: 7
changeset: 6:a214d5d3811a
parent: 5:385a529b6670
parent: 4:5c668c22234f
user: test
date: Thu Jan 01 00:00:06 1970 +0000
summary: merge 4,5
changeset: 5:385a529b6670
parent: 2:051e12f87bf1
user: test
date: Thu Jan 01 00:00:05 1970 +0000
summary: 5
changeset: 4:5c668c22234f
user: test
date: Thu Jan 01 00:00:04 1970 +0000
summary: 4
changeset: 3:0950834f0a9c
user: test
date: Thu Jan 01 00:00:03 1970 +0000
summary: 3
changeset: 2:051e12f87bf1
user: test
date: Thu Jan 01 00:00:02 1970 +0000
summary: 2
changeset: 1:4ca5088da217
user: test
date: Thu Jan 01 00:00:01 1970 +0000
summary: 1
changeset: 0:33b1f9bc8bc5
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: 0
hg up -C
$ hg up -C
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
updated to "d42e18c7bc9b: 18"
3 other heads for branch "default"
complex bisect test 1 # first bad rev is 9
$ hg bisect -r
$ hg bisect -g 0
$ hg bisect -b 17 # -> update to rev 6
Testing changeset 6:a214d5d3811a (15 changesets remaining, ~3 tests)
0 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ hg log -q -r 'bisect(pruned)'
0:33b1f9bc8bc5
17:228c06deef46
$ hg log -q -r 'bisect(untested)'
1:4ca5088da217
2:051e12f87bf1
3:0950834f0a9c
4:5c668c22234f
5:385a529b6670
6:a214d5d3811a
8:dab8161ac8fc
9:3c77083deb4a
10:429fcd26f52d
11:82ca6f06eccd
12:9f259202bbe7
13:b0a32c86eb31
15:857b178a7cf3
16:609d82a7ebae
$ hg log -q -r 'bisect(ignored)'
$ hg bisect -g # -> update to rev 13
Testing changeset 13:b0a32c86eb31 (9 changesets remaining, ~3 tests)
3 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg bisect -s # -> update to rev 10
Testing changeset 10:429fcd26f52d (9 changesets remaining, ~3 tests)
3 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg bisect -b # -> update to rev 8
Testing changeset 8:dab8161ac8fc (3 changesets remaining, ~1 tests)
2 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg bisect -g # -> update to rev 9
Testing changeset 9:3c77083deb4a (2 changesets remaining, ~1 tests)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg bisect -b
The first bad revision is:
changeset: 9:3c77083deb4a
user: test
date: Thu Jan 01 00:00:09 1970 +0000
summary: 9
$ hg log -q -r 'bisect(range)'
0:33b1f9bc8bc5
1:4ca5088da217
2:051e12f87bf1
3:0950834f0a9c
4:5c668c22234f
5:385a529b6670
6:a214d5d3811a
8:dab8161ac8fc
9:3c77083deb4a
10:429fcd26f52d
11:82ca6f06eccd
12:9f259202bbe7
13:b0a32c86eb31
15:857b178a7cf3
16:609d82a7ebae
17:228c06deef46
$ hg log -q -r 'bisect(pruned)'
0:33b1f9bc8bc5
1:4ca5088da217
2:051e12f87bf1
3:0950834f0a9c
4:5c668c22234f
5:385a529b6670
6:a214d5d3811a
8:dab8161ac8fc
9:3c77083deb4a
10:429fcd26f52d
13:b0a32c86eb31
15:857b178a7cf3
16:609d82a7ebae
17:228c06deef46
18:d42e18c7bc9b
$ hg log -q -r 'bisect(untested)'
11:82ca6f06eccd
12:9f259202bbe7
$ hg log -q -r 'bisect(goods)'
0:33b1f9bc8bc5
1:4ca5088da217
2:051e12f87bf1
3:0950834f0a9c
4:5c668c22234f
5:385a529b6670
6:a214d5d3811a
8:dab8161ac8fc
$ hg log -q -r 'bisect(bads)'
9:3c77083deb4a
10:429fcd26f52d
15:857b178a7cf3
16:609d82a7ebae
17:228c06deef46
18:d42e18c7bc9b
complex bisect test 2 # first good rev is 13
$ hg bisect -r
$ hg bisect -g 18
$ hg bisect -b 1 # -> update to rev 6
Testing changeset 6:a214d5d3811a (13 changesets remaining, ~3 tests)
2 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg bisect -s # -> update to rev 10
Testing changeset 10:429fcd26f52d (13 changesets remaining, ~3 tests)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg log -q -r 'bisect(pruned)'
0:33b1f9bc8bc5
1:4ca5088da217
6:a214d5d3811a
18:d42e18c7bc9b
$ hg bisect -b # -> update to rev 12
Testing changeset 12:9f259202bbe7 (5 changesets remaining, ~2 tests)
3 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg log -q -r 'bisect(pruned)'
0:33b1f9bc8bc5
1:4ca5088da217
2:051e12f87bf1
3:0950834f0a9c
4:5c668c22234f
5:385a529b6670
6:a214d5d3811a
8:dab8161ac8fc
9:3c77083deb4a
10:429fcd26f52d
18:d42e18c7bc9b
$ hg log -q -r 'bisect(untested)'
11:82ca6f06eccd
12:9f259202bbe7
13:b0a32c86eb31
15:857b178a7cf3
$ hg bisect -b # -> update to rev 13
Testing changeset 13:b0a32c86eb31 (3 changesets remaining, ~1 tests)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg bisect -g
The first good revision is:
changeset: 13:b0a32c86eb31
user: test
date: Thu Jan 01 00:00:13 1970 +0000
summary: 13
$ hg log -q -r 'bisect(range)'
1:4ca5088da217
2:051e12f87bf1
3:0950834f0a9c
4:5c668c22234f
5:385a529b6670
6:a214d5d3811a
8:dab8161ac8fc
9:3c77083deb4a
10:429fcd26f52d
11:82ca6f06eccd
12:9f259202bbe7
13:b0a32c86eb31
15:857b178a7cf3
18:d42e18c7bc9b
complex bisect test 3
first bad rev is 15
10,9,13 are skipped an might be the first bad revisions as well
$ hg bisect -r
$ hg bisect -g 1
$ hg bisect -b 16 # -> update to rev 6
Testing changeset 6:a214d5d3811a (13 changesets remaining, ~3 tests)
2 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ hg log -q -r 'bisect(pruned)'
0:33b1f9bc8bc5
1:4ca5088da217
16:609d82a7ebae
17:228c06deef46
$ hg bisect -g # -> update to rev 13
Testing changeset 13:b0a32c86eb31 (8 changesets remaining, ~3 tests)
3 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg bisect -s # -> update to rev 10
Testing changeset 10:429fcd26f52d (8 changesets remaining, ~3 tests)
3 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg bisect -s # -> update to rev 12
Testing changeset 12:9f259202bbe7 (8 changesets remaining, ~3 tests)
3 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg log -q -r 'bisect(pruned)'
0:33b1f9bc8bc5
1:4ca5088da217
2:051e12f87bf1
3:0950834f0a9c
4:5c668c22234f
5:385a529b6670
6:a214d5d3811a
10:429fcd26f52d
13:b0a32c86eb31
16:609d82a7ebae
17:228c06deef46
$ hg bisect -g # -> update to rev 9
Testing changeset 9:3c77083deb4a (5 changesets remaining, ~2 tests)
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg bisect -s # -> update to rev 15
Testing changeset 15:857b178a7cf3 (5 changesets remaining, ~2 tests)
3 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg log -q -r 'bisect(ignored)'
$ hg bisect -b
Due to skipped revisions, the first bad revision could be any of:
changeset: 9:3c77083deb4a
user: test
date: Thu Jan 01 00:00:09 1970 +0000
summary: 9
changeset: 10:429fcd26f52d
parent: 9:3c77083deb4a
parent: 6:a214d5d3811a
user: test
date: Thu Jan 01 00:00:10 1970 +0000
summary: merge 6,9
changeset: 13:b0a32c86eb31
user: test
date: Thu Jan 01 00:00:13 1970 +0000
summary: 13
changeset: 15:857b178a7cf3
parent: 13:b0a32c86eb31
parent: 10:429fcd26f52d
user: test
date: Thu Jan 01 00:00:15 1970 +0000
summary: merge 10,13
$ hg log -q -r 'bisect(range)'
1:4ca5088da217
2:051e12f87bf1
3:0950834f0a9c
4:5c668c22234f
5:385a529b6670
6:a214d5d3811a
8:dab8161ac8fc
9:3c77083deb4a
10:429fcd26f52d
11:82ca6f06eccd
12:9f259202bbe7
13:b0a32c86eb31
15:857b178a7cf3
16:609d82a7ebae
$ hg log -q -r 'bisect(ignored)'
complex bisect test 4
first good revision is 17
15,16 are skipped an might be the first good revisions as well
$ hg bisect -r
$ hg bisect -g 17
$ hg bisect -b 8 # -> update to rev 10
Testing changeset 13:b0a32c86eb31 (8 changesets remaining, ~3 tests)
2 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg bisect -b # -> update to rev 13
Testing changeset 10:429fcd26f52d (5 changesets remaining, ~2 tests)
3 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg bisect -b # -> update to rev 15
Testing changeset 15:857b178a7cf3 (3 changesets remaining, ~1 tests)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg log -q -r 'bisect(pruned)'
0:33b1f9bc8bc5
1:4ca5088da217
2:051e12f87bf1
3:0950834f0a9c
4:5c668c22234f
5:385a529b6670
6:a214d5d3811a
8:dab8161ac8fc
9:3c77083deb4a
10:429fcd26f52d
11:82ca6f06eccd
12:9f259202bbe7
13:b0a32c86eb31
17:228c06deef46
$ hg bisect -s # -> update to rev 16
Testing changeset 16:609d82a7ebae (3 changesets remaining, ~1 tests)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg log -q -r 'bisect(pruned)'
0:33b1f9bc8bc5
1:4ca5088da217
2:051e12f87bf1
3:0950834f0a9c
4:5c668c22234f
5:385a529b6670
6:a214d5d3811a
8:dab8161ac8fc
9:3c77083deb4a
10:429fcd26f52d
11:82ca6f06eccd
12:9f259202bbe7
13:b0a32c86eb31
15:857b178a7cf3
17:228c06deef46
$ hg bisect -s
Due to skipped revisions, the first good revision could be any of:
changeset: 15:857b178a7cf3
parent: 13:b0a32c86eb31
parent: 10:429fcd26f52d
user: test
date: Thu Jan 01 00:00:15 1970 +0000
summary: merge 10,13
changeset: 16:609d82a7ebae
user: test
date: Thu Jan 01 00:00:16 1970 +0000
summary: 16
changeset: 17:228c06deef46
user: test
date: Thu Jan 01 00:00:17 1970 +0000
summary: 17
$ hg log -q -r 'bisect(range)'
8:dab8161ac8fc
9:3c77083deb4a
10:429fcd26f52d
11:82ca6f06eccd
12:9f259202bbe7
13:b0a32c86eb31
15:857b178a7cf3
16:609d82a7ebae
17:228c06deef46
$ hg log -q -r 'bisect(pruned)'
0:33b1f9bc8bc5
1:4ca5088da217
2:051e12f87bf1
3:0950834f0a9c
4:5c668c22234f
5:385a529b6670
6:a214d5d3811a
8:dab8161ac8fc
9:3c77083deb4a
10:429fcd26f52d
11:82ca6f06eccd
12:9f259202bbe7
13:b0a32c86eb31
15:857b178a7cf3
16:609d82a7ebae
17:228c06deef46
test unrelated revs:
$ hg bisect --reset
$ hg bisect -b 7
$ hg bisect -g 14
abort: starting revisions are not directly related
[255]
$ hg log -q -r 'bisect(range)'
$ hg log -q -r 'bisect(pruned)'
0:33b1f9bc8bc5
1:4ca5088da217
2:051e12f87bf1
3:0950834f0a9c
4:5c668c22234f
7:50c76098bbf2
14:faa450606157
$ hg bisect --reset
end at merge: 17 bad, 11 good (but 9 is first bad)
$ hg bisect -r
$ hg bisect -b 17
$ hg bisect -g 11
Testing changeset 13:b0a32c86eb31 (5 changesets remaining, ~2 tests)
3 files updated, 0 files merged, 1 files removed, 0 files unresolved
$ hg log -q -r 'bisect(ignored)'
2:051e12f87bf1
3:0950834f0a9c
4:5c668c22234f
5:385a529b6670
6:a214d5d3811a
9:3c77083deb4a
10:429fcd26f52d
$ hg bisect -g
Testing changeset 15:857b178a7cf3 (3 changesets remaining, ~1 tests)
3 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg bisect -b
The first bad revision is:
changeset: 15:857b178a7cf3
parent: 13:b0a32c86eb31
parent: 10:429fcd26f52d
user: test
date: Thu Jan 01 00:00:15 1970 +0000
summary: merge 10,13
Not all ancestors of this changeset have been checked.
Use bisect --extend to continue the bisection from
the common ancestor, dab8161ac8fc.
$ hg log -q -r 'bisect(range)'
11:82ca6f06eccd
12:9f259202bbe7
13:b0a32c86eb31
15:857b178a7cf3
16:609d82a7ebae
17:228c06deef46
$ hg log -q -r 'bisect(pruned)'
0:33b1f9bc8bc5
1:4ca5088da217
8:dab8161ac8fc
11:82ca6f06eccd
12:9f259202bbe7
13:b0a32c86eb31
15:857b178a7cf3
16:609d82a7ebae
17:228c06deef46
18:d42e18c7bc9b
$ hg log -q -r 'bisect(untested)'
$ hg log -q -r 'bisect(ignored)'
2:051e12f87bf1
3:0950834f0a9c
4:5c668c22234f
5:385a529b6670
6:a214d5d3811a
9:3c77083deb4a
10:429fcd26f52d
$ hg bisect --extend
Extending search to changeset 8:dab8161ac8fc
2 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ hg log -q -r 'bisect(untested)'
$ hg log -q -r 'bisect(ignored)'
2:051e12f87bf1
3:0950834f0a9c
4:5c668c22234f
5:385a529b6670
6:a214d5d3811a
9:3c77083deb4a
10:429fcd26f52d
$ hg bisect -g # dab8161ac8fc
Testing changeset 9:3c77083deb4a (3 changesets remaining, ~1 tests)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg log -q -r 'bisect(untested)'
9:3c77083deb4a
10:429fcd26f52d
$ hg log -q -r 'bisect(ignored)'
2:051e12f87bf1
3:0950834f0a9c
4:5c668c22234f
5:385a529b6670
6:a214d5d3811a
$ hg log -q -r 'bisect(goods)'
0:33b1f9bc8bc5
1:4ca5088da217
8:dab8161ac8fc
11:82ca6f06eccd
12:9f259202bbe7
13:b0a32c86eb31
$ hg log -q -r 'bisect(bads)'
15:857b178a7cf3
16:609d82a7ebae
17:228c06deef46
18:d42e18c7bc9b
$ hg bisect -b
The first bad revision is:
changeset: 9:3c77083deb4a
user: test
date: Thu Jan 01 00:00:09 1970 +0000
summary: 9
$ hg log -q -r 'bisect(range)'
8:dab8161ac8fc
9:3c77083deb4a
10:429fcd26f52d
11:82ca6f06eccd
12:9f259202bbe7
13:b0a32c86eb31
15:857b178a7cf3
16:609d82a7ebae
17:228c06deef46
$ hg log -q -r 'bisect(pruned)'
0:33b1f9bc8bc5
1:4ca5088da217
8:dab8161ac8fc
9:3c77083deb4a
10:429fcd26f52d
11:82ca6f06eccd
12:9f259202bbe7
13:b0a32c86eb31
15:857b178a7cf3
16:609d82a7ebae
17:228c06deef46
18:d42e18c7bc9b
$ hg log -q -r 'bisect(untested)'
$ hg log -q -r 'bisect(ignored)'
2:051e12f87bf1
3:0950834f0a9c
4:5c668c22234f
5:385a529b6670
6:a214d5d3811a
$ hg log -q -r 'bisect(goods)'
0:33b1f9bc8bc5
1:4ca5088da217
8:dab8161ac8fc
11:82ca6f06eccd
12:9f259202bbe7
13:b0a32c86eb31
$ hg log -q -r 'bisect(bads)'
9:3c77083deb4a
10:429fcd26f52d
15:857b178a7cf3
16:609d82a7ebae
17:228c06deef46
18:d42e18c7bc9b
user adds irrelevant but consistent information (here: -g 2) to bisect state
$ hg bisect -r
$ hg bisect -b 13
$ hg bisect -g 8
Testing changeset 11:82ca6f06eccd (3 changesets remaining, ~1 tests)
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg log -q -r 'bisect(untested)'
11:82ca6f06eccd
12:9f259202bbe7
$ hg bisect -g 2
Testing changeset 11:82ca6f06eccd (3 changesets remaining, ~1 tests)
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg log -q -r 'bisect(untested)'
11:82ca6f06eccd
12:9f259202bbe7
$ hg bisect -b
The first bad revision is:
changeset: 11:82ca6f06eccd
parent: 8:dab8161ac8fc
user: test
date: Thu Jan 01 00:00:11 1970 +0000
summary: 11
$ hg log -q -r 'bisect(range)'
8:dab8161ac8fc
11:82ca6f06eccd
12:9f259202bbe7
13:b0a32c86eb31
$ hg log -q -r 'bisect(pruned)'
0:33b1f9bc8bc5
1:4ca5088da217
2:051e12f87bf1
8:dab8161ac8fc
11:82ca6f06eccd
12:9f259202bbe7
13:b0a32c86eb31
14:faa450606157
15:857b178a7cf3
16:609d82a7ebae
17:228c06deef46
18:d42e18c7bc9b
$ hg log -q -r 'bisect(untested)'