view tests/test-revset.t @ 30155:b7a966ce89ed

changelog: disable delta chains

This patch disables delta chains on changelogs. After this patch, new
entries on changelogs - including existing changelogs - will be stored
as the fulltext of that data (likely compressed). No delta computation
will be performed.

An overview of delta chains and data justifying this change follows.

Revlogs try to store entries as a delta against a previous entry (either
a parent revision in the case of generaldelta or the previous physical
revision when not using generaldelta). Most of the time this is the
correct thing to do: it frequently results in less CPU usage and smaller
storage.

Delta chains are most effective when the base revision being deltad
against is similar to the current data. This tends to occur naturally
for manifests and file data, since only small parts of each tend to
change with each revision. Changelogs, however, are a different story.

Changelog entries represent changesets/commits. And unless commits in a
repository are homogonous (same author, changing same files, similar
commit messages, etc), a delta from one entry to the next tends to be
relatively large compared to the size of the entry. This means that
delta chains tend to be short. How short? Here is the full vs delta
revision breakdown on some real world repos:

Repo             % Full    % Delta   Max Length
hg                45.8       54.2        6
mozilla-central   42.4       57.6        8
mozilla-unified   42.5       57.5       17
pypy              46.1       53.9        6
python-zstandard  46.1       53.9        3

(I threw in python-zstandard as an example of a repo that is homogonous.
It contains a small Python project with changes all from the same
author.)

Contrast this with the manifest revlog for these repos, where 99+% of
revisions are deltas and delta chains run into the thousands.

So delta chains aren't as useful on changelogs. But even a short delta
chain may provide benefits. Let's measure that.

Delta chains may require less CPU to read revisions if the CPU time
spent reading smaller deltas is less than the CPU time used to
decompress larger individual entries. We can measure this via
`hg perfrevlog -c -d 1` to iterate a revlog to resolve each revision's
fulltext. Here are the results of that command on a repo using delta
chains in its changelog and on a repo without delta chains:

hg (forward)
! wall 0.407008 comb 0.410000 user 0.410000 sys 0.000000 (best of 25)
! wall 0.390061 comb 0.390000 user 0.390000 sys 0.000000 (best of 26)

hg (reverse)
! wall 0.515221 comb 0.520000 user 0.520000 sys 0.000000 (best of 19)
! wall 0.400018 comb 0.400000 user 0.390000 sys 0.010000 (best of 25)

mozilla-central (forward)
! wall 4.508296 comb 4.490000 user 4.490000 sys 0.000000 (best of 3)
! wall 4.370222 comb 4.370000 user 4.350000 sys 0.020000 (best of 3)

mozilla-central (reverse)
! wall 5.758995 comb 5.760000 user 5.720000 sys 0.040000 (best of 3)
! wall 4.346503 comb 4.340000 user 4.320000 sys 0.020000 (best of 3)

mozilla-unified (forward)
! wall 4.957088 comb 4.950000 user 4.940000 sys 0.010000 (best of 3)
! wall 4.660528 comb 4.650000 user 4.630000 sys 0.020000 (best of 3)

mozilla-unified (reverse)
! wall 6.119827 comb 6.110000 user 6.090000 sys 0.020000 (best of 3)
! wall 4.675136 comb 4.670000 user 4.670000 sys 0.000000 (best of 3)

pypy (forward)
! wall 1.231122 comb 1.240000 user 1.230000 sys 0.010000 (best of 8)
! wall 1.164896 comb 1.160000 user 1.160000 sys 0.000000 (best of 9)

pypy (reverse)
! wall 1.467049 comb 1.460000 user 1.460000 sys 0.000000 (best of 7)
! wall 1.160200 comb 1.170000 user 1.160000 sys 0.010000 (best of 9)

The data clearly shows that it takes less wall and CPU time to resolve
revisions when there are no delta chains in the changelogs, regardless
of the direction of traversal. Furthermore, not using a delta chain
means that fulltext resolution in reverse is as fast as iterating
forward. So not using delta chains on the changelog is a clear CPU win
for reading operations.

An example of a user-visible operation showing this speed-up is revset
evaluation. Here are results for
`hg perfrevset 'author(gps) or author(mpm)'`:

hg
! wall 1.655506 comb 1.660000 user 1.650000 sys 0.010000 (best of 6)
! wall 1.612723 comb 1.610000 user 1.600000 sys 0.010000 (best of 7)

mozilla-central
! wall 17.629826 comb 17.640000 user 17.600000 sys 0.040000 (best of 3)
! wall 17.311033 comb 17.300000 user 17.260000 sys 0.040000 (best of 3)

What about 00changelog.i size?

Repo                Delta Chains     No Delta Chains
hg                    7,033,250         6,976,771
mozilla-central      82,978,748        81,574,623
mozilla-unified      88,112,349        86,702,162
pypy                 20,740,699        20,659,741

The data shows that removing delta chains from the changelog makes the
changelog smaller.

Delta chains are also used during changegroup generation. This
operation essentially converts a series of revisions to one large
delta chain. And changegroup generation is smart: if the delta in
the revlog matches what the changegroup is emitting, it will reuse
the delta instead of recalculating it. We can measure the impact
removing changelog delta chains has on changegroup generation via
`hg perfchangegroupchangelog`:

hg
! wall 1.589245 comb 1.590000 user 1.590000 sys 0.000000 (best of 7)
! wall 1.788060 comb 1.790000 user 1.790000 sys 0.000000 (best of 6)

mozilla-central
! wall 17.382585 comb 17.380000 user 17.340000 sys 0.040000 (best of 3)
! wall 20.161357 comb 20.160000 user 20.120000 sys 0.040000 (best of 3)

mozilla-unified
! wall 18.722839 comb 18.720000 user 18.680000 sys 0.040000 (best of 3)
! wall 21.168075 comb 21.170000 user 21.130000 sys 0.040000 (best of 3)

pypy
! wall 4.828317 comb 4.830000 user 4.820000 sys 0.010000 (best of 3)
! wall 5.415455 comb 5.420000 user 5.410000 sys 0.010000 (best of 3)

The data shows eliminating delta chains makes the changelog part of
changegroup generation slower. This is expected since we now have to
compute deltas for revisions where we could recycle the delta before.

It is worth putting this regression into context of overall changegroup
times. Here is the rough total CPU time spent in changegroup generation
for various repos while using delta chains on the changelog:

Repo              CPU Time (s)    CPU Time w/ compression
hg                  4.50              7.05
mozilla-central   111.1             222.0
pypy               28.68             75.5

Before compression, removing delta chains from the changegroup adds
~4.4% overhead to hg changegroup generation, 1.3% to mozilla-central,
and 2.0% to pypy. When you factor in zlib compression, these percentages
are roughly divided by 2.

While the increased CPU usage for changegroup generation is unfortunate,
I think it is acceptable because the percentage is small, server
operators (those likely impacted most by this) have other mechanisms
to mitigate CPU consumption (namely reducing zlib compression level and
pre-generated clone bundles), and because there is room to optimize this
in the future. For example, we could use the nullid as the base revision,
effectively encoding the full revision for each entry in the changegroup.
When doing this, `hg perfchangegroupchangelog` nearly halves:

mozilla-unified
! wall 21.168075 comb 21.170000 user 21.130000 sys 0.040000 (best of 3)
! wall 11.196461 comb 11.200000 user 11.190000 sys 0.010000 (best of 3)

This looks very promising as a future optimization opportunity.

It's worth that the changes in test-acl.t to the changegroup part size.
This is because revision 6 in the changegroup had a delta chain of
length 2 before and after this patch the base revision is nullrev.
When the base revision is nullrev, cg2packer.deltaparent() hardcodes
the *previous* revision from the changegroup as the delta parent.
This caused the delta in the changegroup to switch base revisions,
the delta to change, and the size to change accordingly. While the
size increased in this case, I think sizes will remain the same
on average, as the delta base for changelog revisions doesn't matter
too much (as this patch shows). So, I don't consider this a regression.

  $ HGENCODING=utf-8
  $ export HGENCODING
  $ cat > testrevset.py << EOF
  > import mercurial.revset
  > 
  > baseset = mercurial.revset.baseset
  > 
  > def r3232(repo, subset, x):
  >     """"simple revset that return [3,2,3,2]
  > 
  >     revisions duplicated on purpose.
  >     """
  >     if 3 not in subset:
  >        if 2 in subset:
  >            return baseset([2,2])
  >        return baseset()
  >     return baseset([3,3,2,2])
  > 
  > mercurial.revset.symbols['r3232'] = r3232
  > EOF
  $ cat >> $HGRCPATH << EOF
  > [extensions]
  > testrevset=$TESTTMP/testrevset.py
  > EOF

  $ try() {
  >   hg debugrevspec --debug "$@"
  > }

  $ log() {
  >   hg log --template '{rev}\n' -r "$1"
  > }

extension to build '_intlist()' and '_hexlist()', which is necessary because
these predicates use '\0' as a separator:

  $ cat <<EOF > debugrevlistspec.py
  > from __future__ import absolute_import
  > from mercurial import (
  >     cmdutil,
  >     node as nodemod,
  >     revset,
  > )
  > cmdtable = {}
  > command = cmdutil.command(cmdtable)
  > @command('debugrevlistspec',
  >     [('', 'optimize', None, 'print parsed tree after optimizing'),
  >      ('', 'bin', None, 'unhexlify arguments')])
  > def debugrevlistspec(ui, repo, fmt, *args, **opts):
  >     if opts['bin']:
  >         args = map(nodemod.bin, args)
  >     expr = revset.formatspec(fmt, list(args))
  >     if ui.verbose:
  >         tree = revset.parse(expr, lookup=repo.__contains__)
  >         ui.note(revset.prettyformat(tree), "\n")
  >         if opts["optimize"]:
  >             opttree = revset.optimize(revset.analyze(tree))
  >             ui.note("* optimized:\n", revset.prettyformat(opttree), "\n")
  >     func = revset.match(ui, expr, repo)
  >     revs = func(repo)
  >     if ui.verbose:
  >         ui.note("* set:\n", revset.prettyformatset(revs), "\n")
  >     for c in revs:
  >         ui.write("%s\n" % c)
  > EOF
  $ cat <<EOF >> $HGRCPATH
  > [extensions]
  > debugrevlistspec = $TESTTMP/debugrevlistspec.py
  > EOF
  $ trylist() {
  >   hg debugrevlistspec --debug "$@"
  > }

  $ hg init repo
  $ cd repo

  $ echo a > a
  $ hg branch a
  marked working directory as branch a
  (branches are permanent and global, did you want a bookmark?)
  $ hg ci -Aqm0

  $ echo b > b
  $ hg branch b
  marked working directory as branch b
  $ hg ci -Aqm1

  $ rm a
  $ hg branch a-b-c-
  marked working directory as branch a-b-c-
  $ hg ci -Aqm2 -u Bob

  $ hg log -r "extra('branch', 'a-b-c-')" --template '{rev}\n'
  2
  $ hg log -r "extra('branch')" --template '{rev}\n'
  0
  1
  2
  $ hg log -r "extra('branch', 're:a')" --template '{rev} {branch}\n'
  0 a
  2 a-b-c-

  $ hg co 1
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg branch +a+b+c+
  marked working directory as branch +a+b+c+
  $ hg ci -Aqm3

  $ hg co 2  # interleave
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo bb > b
  $ hg branch -- -a-b-c-
  marked working directory as branch -a-b-c-
  $ hg ci -Aqm4 -d "May 12 2005"

  $ hg co 3
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg branch !a/b/c/
  marked working directory as branch !a/b/c/
  $ hg ci -Aqm"5 bug"

  $ hg merge 4
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg branch _a_b_c_
  marked working directory as branch _a_b_c_
  $ hg ci -Aqm"6 issue619"

  $ hg branch .a.b.c.
  marked working directory as branch .a.b.c.
  $ hg ci -Aqm7

  $ hg branch all
  marked working directory as branch all

  $ hg co 4
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg branch é
  marked working directory as branch \xc3\xa9 (esc)
  $ hg ci -Aqm9

  $ hg tag -r6 1.0
  $ hg bookmark -r6 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

  $ hg clone --quiet -U -r 7 . ../remote1
  $ hg clone --quiet -U -r 8 . ../remote2
  $ echo "[paths]" >> .hg/hgrc
  $ echo "default = ../remote1" >> .hg/hgrc

trivial

  $ try 0:1
  (range
    ('symbol', '0')
    ('symbol', '1'))
  * set:
  <spanset+ 0:1>
  0
  1
  $ try --optimize :
  (rangeall
    None)
  * optimized:
  (rangepre
    ('string', 'tip')
    define)
  * set:
  <spanset+ 0:9>
  0
  1
  2
  3
  4
  5
  6
  7
  8
  9
  $ try 3::6
  (dagrange
    ('symbol', '3')
    ('symbol', '6'))
  * set:
  <baseset+ [3, 5, 6]>
  3
  5
  6
  $ try '0|1|2'
  (or
    (list
      ('symbol', '0')
      ('symbol', '1')
      ('symbol', '2')))
  * set:
  <baseset [0, 1, 2]>
  0
  1
  2

names that should work without quoting

  $ try a
  ('symbol', 'a')
  * set:
  <baseset [0]>
  0
  $ try b-a
  (minus
    ('symbol', 'b')
    ('symbol', 'a'))
  * set:
  <filteredset
    <baseset [1]>,
    <not
      <baseset [0]>>>
  1
  $ try _a_b_c_
  ('symbol', '_a_b_c_')
  * set:
  <baseset [6]>
  6
  $ try _a_b_c_-a
  (minus
    ('symbol', '_a_b_c_')
    ('symbol', 'a'))
  * set:
  <filteredset
    <baseset [6]>,
    <not
      <baseset [0]>>>
  6
  $ try .a.b.c.
  ('symbol', '.a.b.c.')
  * set:
  <baseset [7]>
  7
  $ try .a.b.c.-a
  (minus
    ('symbol', '.a.b.c.')
    ('symbol', 'a'))
  * set:
  <filteredset
    <baseset [7]>,
    <not
      <baseset [0]>>>
  7

names that should be caught by fallback mechanism

  $ try -- '-a-b-c-'
  ('symbol', '-a-b-c-')
  * set:
  <baseset [4]>
  4
  $ log -a-b-c-
  4
  $ try '+a+b+c+'
  ('symbol', '+a+b+c+')
  * set:
  <baseset [3]>
  3
  $ try '+a+b+c+:'
  (rangepost
    ('symbol', '+a+b+c+'))
  * set:
  <spanset+ 3:9>
  3
  4
  5
  6
  7
  8
  9
  $ try ':+a+b+c+'
  (rangepre
    ('symbol', '+a+b+c+'))
  * set:
  <spanset+ 0:3>
  0
  1
  2
  3
  $ try -- '-a-b-c-:+a+b+c+'
  (range
    ('symbol', '-a-b-c-')
    ('symbol', '+a+b+c+'))
  * set:
  <spanset- 3:4>
  4
  3
  $ log '-a-b-c-:+a+b+c+'
  4
  3

  $ try -- -a-b-c--a # complains
  (minus
    (minus
      (minus
        (negate
          ('symbol', 'a'))
        ('symbol', 'b'))
      ('symbol', 'c'))
    (negate
      ('symbol', 'a')))
  abort: unknown revision '-a'!
  [255]
  $ try é
  ('symbol', '\xc3\xa9')
  * set:
  <baseset [9]>
  9

no quoting needed

  $ log ::a-b-c-
  0
  1
  2

quoting needed

  $ try '"-a-b-c-"-a'
  (minus
    ('string', '-a-b-c-')
    ('symbol', 'a'))
  * set:
  <filteredset
    <baseset [4]>,
    <not
      <baseset [0]>>>
  4

  $ log '1 or 2'
  1
  2
  $ log '1|2'
  1
  2
  $ log '1 and 2'
  $ log '1&2'
  $ try '1&2|3' # precedence - and is higher
  (or
    (list
      (and
        ('symbol', '1')
        ('symbol', '2'))
      ('symbol', '3')))
  * set:
  <addset
    <baseset []>,
    <baseset [3]>>
  3
  $ try '1|2&3'
  (or
    (list
      ('symbol', '1')
      (and
        ('symbol', '2')
        ('symbol', '3'))))
  * set:
  <addset
    <baseset [1]>,
    <baseset []>>
  1
  $ try '1&2&3' # associativity
  (and
    (and
      ('symbol', '1')
      ('symbol', '2'))
    ('symbol', '3'))
  * set:
  <baseset []>
  $ try '1|(2|3)'
  (or
    (list
      ('symbol', '1')
      (group
        (or
          (list
            ('symbol', '2')
            ('symbol', '3'))))))
  * set:
  <addset
    <baseset [1]>,
    <baseset [2, 3]>>
  1
  2
  3
  $ log '1.0' # tag
  6
  $ log 'a' # branch
  0
  $ log '2785f51ee'
  0
  $ log 'date(2005)'
  4
  $ log 'date(this is a test)'
  hg: parse error at 10: unexpected token: symbol
  [255]
  $ log 'date()'
  hg: parse error: date requires a string
  [255]
  $ log 'date'
  abort: unknown revision 'date'!
  [255]
  $ log 'date('
  hg: parse error at 5: not a prefix: end
  [255]
  $ log 'date("\xy")'
  hg: parse error: invalid \x escape
  [255]
  $ log 'date(tip)'
  abort: invalid date: 'tip'
  [255]
  $ log '0:date'
  abort: unknown revision 'date'!
  [255]
  $ log '::"date"'
  abort: unknown revision 'date'!
  [255]
  $ hg book date -r 4
  $ log '0:date'
  0
  1
  2
  3
  4
  $ log '::date'
  0
  1
  2
  4
  $ log '::"date"'
  0
  1
  2
  4
  $ log 'date(2005) and 1::'
  4
  $ hg book -d date

function name should be a symbol

  $ log '"date"(2005)'
  hg: parse error: not a symbol
  [255]

keyword arguments

  $ log 'extra(branch, value=a)'
  0

  $ log 'extra(branch, a, b)'
  hg: parse error: extra takes at most 2 arguments
  [255]
  $ log 'extra(a, label=b)'
  hg: parse error: extra got multiple values for keyword argument 'label'
  [255]
  $ log 'extra(label=branch, default)'
  hg: parse error: extra got an invalid argument
  [255]
  $ log 'extra(branch, foo+bar=baz)'
  hg: parse error: extra got an invalid argument
  [255]
  $ log 'extra(unknown=branch)'
  hg: parse error: extra got an unexpected keyword argument 'unknown'
  [255]

  $ try 'foo=bar|baz'
  (keyvalue
    ('symbol', 'foo')
    (or
      (list
        ('symbol', 'bar')
        ('symbol', 'baz'))))
  hg: parse error: can't use a key-value pair in this context
  [255]

 right-hand side should be optimized recursively

  $ try --optimize 'foo=(not public())'
  (keyvalue
    ('symbol', 'foo')
    (group
      (not
        (func
          ('symbol', 'public')
          None))))
  * optimized:
  (keyvalue
    ('symbol', 'foo')
    (func
      ('symbol', '_notpublic')
      None
      any))
  hg: parse error: can't use a key-value pair in this context
  [255]

parsed tree at stages:

  $ hg debugrevspec -p all '()'
  * parsed:
  (group
    None)
  * expanded:
  (group
    None)
  * concatenated:
  (group
    None)
  * analyzed:
  None
  * optimized:
  None
  hg: parse error: missing argument
  [255]

  $ hg debugrevspec --no-optimized -p all '()'
  * parsed:
  (group
    None)
  * expanded:
  (group
    None)
  * concatenated:
  (group
    None)
  * analyzed:
  None
  hg: parse error: missing argument
  [255]

  $ hg debugrevspec -p parsed -p analyzed -p optimized '(0|1)-1'
  * parsed:
  (minus
    (group
      (or
        (list
          ('symbol', '0')
          ('symbol', '1'))))
    ('symbol', '1'))
  * analyzed:
  (and
    (or
      (list
        ('symbol', '0')
        ('symbol', '1'))
      define)
    (not
      ('symbol', '1')
      follow)
    define)
  * optimized:
  (difference
    (func
      ('symbol', '_list')
      ('string', '0\x001')
      define)
    ('symbol', '1')
    define)
  0

  $ hg debugrevspec -p unknown '0'
  abort: invalid stage name: unknown
  [255]

  $ hg debugrevspec -p all --optimize '0'
  abort: cannot use --optimize with --show-stage
  [255]

verify optimized tree:

  $ hg debugrevspec --verify '0|1'

  $ hg debugrevspec --verify -v -p analyzed -p optimized 'r3232() & 2'
  * analyzed:
  (and
    (func
      ('symbol', 'r3232')
      None
      define)
    ('symbol', '2')
    define)
  * optimized:
  (and
    ('symbol', '2')
    (func
      ('symbol', 'r3232')
      None
      define)
    define)
  * analyzed set:
  <baseset [2]>
  * optimized set:
  <baseset [2, 2]>
  --- analyzed
  +++ optimized
   2
  +2
  [1]

  $ hg debugrevspec --no-optimized --verify-optimized '0'
  abort: cannot use --verify-optimized with --no-optimized
  [255]

Test that symbols only get parsed as functions if there's an opening
parenthesis.

  $ hg book only -r 9
  $ log 'only(only)'   # Outer "only" is a function, inner "only" is the bookmark
  8
  9

':y' behaves like '0:y', but can't be rewritten as such since the revision '0'
may be hidden (issue5385)

  $ try -p parsed -p analyzed ':'
  * parsed:
  (rangeall
    None)
  * analyzed:
  (rangepre
    ('string', 'tip')
    define)
  * set:
  <spanset+ 0:9>
  0
  1
  2
  3
  4
  5
  6
  7
  8
  9
  $ try -p analyzed ':1'
  * analyzed:
  (rangepre
    ('symbol', '1')
    define)
  * set:
  <spanset+ 0:1>
  0
  1
  $ try -p analyzed ':(1|2)'
  * analyzed:
  (rangepre
    (or
      (list
        ('symbol', '1')
        ('symbol', '2'))
      define)
    define)
  * set:
  <spanset+ 0:2>
  0
  1
  2
  $ try -p analyzed ':(1&2)'
  * analyzed:
  (rangepre
    (and
      ('symbol', '1')
      ('symbol', '2')
      define)
    define)
  * set:
  <baseset []>

infix/suffix resolution of ^ operator (issue2884):

 x^:y means (x^):y

  $ try '1^:2'
  (range
    (parentpost
      ('symbol', '1'))
    ('symbol', '2'))
  * set:
  <spanset+ 0:2>
  0
  1
  2

  $ try '1^::2'
  (dagrange
    (parentpost
      ('symbol', '1'))
    ('symbol', '2'))
  * set:
  <baseset+ [0, 1, 2]>
  0
  1
  2

  $ try '9^:'
  (rangepost
    (parentpost
      ('symbol', '9')))
  * set:
  <spanset+ 8:9>
  8
  9

 x^:y should be resolved before omitting group operators

  $ try '1^(:2)'
  (parent
    ('symbol', '1')
    (group
      (rangepre
        ('symbol', '2'))))
  hg: parse error: ^ expects a number 0, 1, or 2
  [255]

 x^:y should be resolved recursively

  $ try 'sort(1^:2)'
  (func
    ('symbol', 'sort')
    (range
      (parentpost
        ('symbol', '1'))
      ('symbol', '2')))
  * set:
  <spanset+ 0:2>
  0
  1
  2

  $ try '(3^:4)^:2'
  (range
    (parentpost
      (group
        (range
          (parentpost
            ('symbol', '3'))
          ('symbol', '4'))))
    ('symbol', '2'))
  * set:
  <spanset+ 0:2>
  0
  1
  2

  $ try '(3^::4)^::2'
  (dagrange
    (parentpost
      (group
        (dagrange
          (parentpost
            ('symbol', '3'))
          ('symbol', '4'))))
    ('symbol', '2'))
  * set:
  <baseset+ [0, 1, 2]>
  0
  1
  2

  $ try '(9^:)^:'
  (rangepost
    (parentpost
      (group
        (rangepost
          (parentpost
            ('symbol', '9'))))))
  * set:
  <spanset+ 4:9>
  4
  5
  6
  7
  8
  9

 x^ in alias should also be resolved

  $ try 'A' --config 'revsetalias.A=1^:2'
  ('symbol', 'A')
  * expanded:
  (range
    (parentpost
      ('symbol', '1'))
    ('symbol', '2'))
  * set:
  <spanset+ 0:2>
  0
  1
  2

  $ try 'A:2' --config 'revsetalias.A=1^'
  (range
    ('symbol', 'A')
    ('symbol', '2'))
  * expanded:
  (range
    (parentpost
      ('symbol', '1'))
    ('symbol', '2'))
  * set:
  <spanset+ 0:2>
  0
  1
  2

 but not beyond the boundary of alias expansion, because the resolution should
 be made at the parsing stage

  $ try '1^A' --config 'revsetalias.A=:2'
  (parent
    ('symbol', '1')
    ('symbol', 'A'))
  * expanded:
  (parent
    ('symbol', '1')
    (rangepre
      ('symbol', '2')))
  hg: parse error: ^ expects a number 0, 1, or 2
  [255]

ancestor can accept 0 or more arguments

  $ log 'ancestor()'
  $ log 'ancestor(1)'
  1
  $ log 'ancestor(4,5)'
  1
  $ log 'ancestor(4,5) and 4'
  $ log 'ancestor(0,0,1,3)'
  0
  $ log 'ancestor(3,1,5,3,5,1)'
  1
  $ log 'ancestor(0,1,3,5)'
  0
  $ log 'ancestor(1,2,3,4,5)'
  1

test ancestors

  $ log 'ancestors(5)'
  0
  1
  3
  5
  $ log 'ancestor(ancestors(5))'
  0
  $ log '::r3232()'
  0
  1
  2
  3

  $ log 'author(bob)'
  2
  $ log 'author("re:bob|test")'
  0
  1
  2
  3
  4
  5
  6
  7
  8
  9
  $ log 'branch(é)'
  8
  9
  $ log 'branch(a)'
  0
  $ hg log -r 'branch("re:a")' --template '{rev} {branch}\n'
  0 a
  2 a-b-c-
  3 +a+b+c+
  4 -a-b-c-
  5 !a/b/c/
  6 _a_b_c_
  7 .a.b.c.
  $ log 'children(ancestor(4,5))'
  2
  3
  $ log 'closed()'
  $ log 'contains(a)'
  0
  1
  3
  5
  $ log 'contains("../repo/a")'
  0
  1
  3
  5
  $ log 'desc(B)'
  5
  $ log 'descendants(2 or 3)'
  2
  3
  4
  5
  6
  7
  8
  9
  $ log 'file("b*")'
  1
  4
  $ log 'filelog("b")'
  1
  4
  $ log 'filelog("../repo/b")'
  1
  4
  $ log 'follow()'
  0
  1
  2
  4
  8
  9
  $ log 'grep("issue\d+")'
  6
  $ try 'grep("(")' # invalid regular expression
  (func
    ('symbol', 'grep')
    ('string', '('))
  hg: parse error: invalid match pattern: unbalanced parenthesis
  [255]
  $ try 'grep("\bissue\d+")'
  (func
    ('symbol', 'grep')
    ('string', '\x08issue\\d+'))
  * set:
  <filteredset
    <fullreposet+ 0:9>,
    <grep '\x08issue\\d+'>>
  $ try 'grep(r"\bissue\d+")'
  (func
    ('symbol', 'grep')
    ('string', '\\bissue\\d+'))
  * set:
  <filteredset
    <fullreposet+ 0:9>,
    <grep '\\bissue\\d+'>>
  6
  $ try 'grep(r"\")'
  hg: parse error at 7: unterminated string
  [255]
  $ log 'head()'
  0
  1
  2
  3
  4
  5
  6
  7
  9
  $ log 'heads(6::)'
  7
  $ log 'keyword(issue)'
  6
  $ log 'keyword("test a")'
  $ log 'limit(head(), 1)'
  0
  $ log 'limit(author("re:bob|test"), 3, 5)'
  5
  6
  7
  $ log 'limit(author("re:bob|test"), offset=6)'
  6
  $ log 'limit(author("re:bob|test"), offset=10)'
  $ log 'limit(all(), 1, -1)'
  hg: parse error: negative offset
  [255]
  $ log 'matching(6)'
  6
  $ log 'matching(6:7, "phase parents user date branch summary files description substate")'
  6
  7

Testing min and max

max: simple

  $ log 'max(contains(a))'
  5

max: simple on unordered set)

  $ log 'max((4+0+2+5+7) and contains(a))'
  5

max: no result

  $ log 'max(contains(stringthatdoesnotappearanywhere))'

max: no result on unordered set

  $ log 'max((4+0+2+5+7) and contains(stringthatdoesnotappearanywhere))'

min: simple

  $ log 'min(contains(a))'
  0

min: simple on unordered set

  $ log 'min((4+0+2+5+7) and contains(a))'
  0

min: empty

  $ log 'min(contains(stringthatdoesnotappearanywhere))'

min: empty on unordered set

  $ log 'min((4+0+2+5+7) and contains(stringthatdoesnotappearanywhere))'


  $ log 'merge()'
  6
  $ log 'branchpoint()'
  1
  4
  $ log 'modifies(b)'
  4
  $ log 'modifies("path:b")'
  4
  $ log 'modifies("*")'
  4
  6
  $ log 'modifies("set:modified()")'
  4
  $ log 'id(5)'
  2
  $ log 'only(9)'
  8
  9
  $ log 'only(8)'
  8
  $ log 'only(9, 5)'
  2
  4
  8
  9
  $ log 'only(7 + 9, 5 + 2)'
  4
  6
  7
  8
  9

Test empty set input
  $ log 'only(p2())'
  $ log 'only(p1(), p2())'
  0
  1
  2
  4
  8
  9

Test '%' operator

  $ log '9%'
  8
  9
  $ log '9%5'
  2
  4
  8
  9
  $ log '(7 + 9)%(5 + 2)'
  4
  6
  7
  8
  9

Test opreand of '%' is optimized recursively (issue4670)

  $ try --optimize '8:9-8%'
  (onlypost
    (minus
      (range
        ('symbol', '8')
        ('symbol', '9'))
      ('symbol', '8')))
  * optimized:
  (func
    ('symbol', 'only')
    (difference
      (range
        ('symbol', '8')
        ('symbol', '9')
        define)
      ('symbol', '8')
      define)
    define)
  * set:
  <baseset+ [8, 9]>
  8
  9
  $ try --optimize '(9)%(5)'
  (only
    (group
      ('symbol', '9'))
    (group
      ('symbol', '5')))
  * optimized:
  (func
    ('symbol', 'only')
    (list
      ('symbol', '9')
      ('symbol', '5'))
    define)
  * set:
  <baseset+ [2, 4, 8, 9]>
  2
  4
  8
  9

Test the order of operations

  $ log '7 + 9%5 + 2'
  7
  2
  4
  8
  9

Test explicit numeric revision
  $ log 'rev(-2)'
  $ log 'rev(-1)'
  -1
  $ log 'rev(0)'
  0
  $ log 'rev(9)'
  9
  $ log 'rev(10)'
  $ log 'rev(tip)'
  hg: parse error: rev expects a number
  [255]

Test hexadecimal revision
  $ log 'id(2)'
  abort: 00changelog.i@2: ambiguous identifier!
  [255]
  $ log 'id(23268)'
  4
  $ log 'id(2785f51eece)'
  0
  $ log 'id(d5d0dcbdc4d9ff5dbb2d336f32f0bb561c1a532c)'
  8
  $ log 'id(d5d0dcbdc4a)'
  $ log 'id(d5d0dcbdc4w)'
  $ log 'id(d5d0dcbdc4d9ff5dbb2d336f32f0bb561c1a532d)'
  $ log 'id(d5d0dcbdc4d9ff5dbb2d336f32f0bb561c1a532q)'
  $ log 'id(1.0)'
  $ log 'id(xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx)'

Test null revision
  $ log '(null)'
  -1
  $ log '(null:0)'
  -1
  0
  $ log '(0:null)'
  0
  -1
  $ log 'null::0'
  -1
  0
  $ log 'null:tip - 0:'
  -1
  $ log 'null: and null::' | head -1
  -1
  $ log 'null: or 0:' | head -2
  -1
  0
  $ log 'ancestors(null)'
  -1
  $ log 'reverse(null:)' | tail -2
  0
  -1
BROKEN: should be '-1'
  $ log 'first(null:)'
BROKEN: should be '-1'
  $ log 'min(null:)'
  $ log 'tip:null and all()' | tail -2
  1
  0

Test working-directory revision
  $ hg debugrevspec 'wdir()'
  2147483647
  $ hg debugrevspec 'tip or wdir()'
  9
  2147483647
  $ hg debugrevspec '0:tip and wdir()'
  $ log '0:wdir()' | tail -3
  8
  9
  2147483647
  $ log 'wdir():0' | head -3
  2147483647
  9
  8
  $ log 'wdir():wdir()'
  2147483647
  $ log '(all() + wdir()) & min(. + wdir())'
  9
  $ log '(all() + wdir()) & max(. + wdir())'
  2147483647
  $ log '(all() + wdir()) & first(wdir() + .)'
  2147483647
  $ log '(all() + wdir()) & last(. + wdir())'
  2147483647

  $ log 'outgoing()'
  8
  9
  $ log 'outgoing("../remote1")'
  8
  9
  $ log 'outgoing("../remote2")'
  3
  5
  6
  7
  9
  $ log 'p1(merge())'
  5
  $ log 'p2(merge())'
  4
  $ log 'parents(merge())'
  4
  5
  $ log 'p1(branchpoint())'
  0
  2
  $ log 'p2(branchpoint())'
  $ log 'parents(branchpoint())'
  0
  2
  $ log 'removes(a)'
  2
  6
  $ log 'roots(all())'
  0
  $ log 'reverse(2 or 3 or 4 or 5)'
  5
  4
  3
  2
  $ log 'reverse(all())'
  9
  8
  7
  6
  5
  4
  3
  2
  1
  0
  $ log 'reverse(all()) & filelog(b)'
  4
  1
  $ log 'rev(5)'
  5
  $ log 'sort(limit(reverse(all()), 3))'
  7
  8
  9
  $ log 'sort(2 or 3 or 4 or 5, date)'
  2
  3
  5
  4
  $ log 'tagged()'
  6
  $ log 'tag()'
  6
  $ log 'tag(1.0)'
  6
  $ log 'tag(tip)'
  9

Test order of revisions in compound expression
----------------------------------------------

The general rule is that only the outermost (= leftmost) predicate can
enforce its ordering requirement. The other predicates should take the
ordering defined by it.

 'A & B' should follow the order of 'A':

  $ log '2:0 & 0::2'
  2
  1
  0

 'head()' combines sets in right order:

  $ log '2:0 & head()'
  2
  1
  0

 'x:y' takes ordering parameter into account:

  $ try -p optimized '3:0 & 0:3 & not 2:1'
  * optimized:
  (difference
    (and
      (range
        ('symbol', '3')
        ('symbol', '0')
        define)
      (range
        ('symbol', '0')
        ('symbol', '3')
        follow)
      define)
    (range
      ('symbol', '2')
      ('symbol', '1')
      any)
    define)
  * set:
  <filteredset
    <filteredset
      <spanset- 0:3>,
      <spanset+ 0:3>>,
    <not
      <spanset+ 1:2>>>
  3
  0

 'a + b', which is optimized to '_list(a b)', should take the ordering of
 the left expression:

  $ try --optimize '2:0 & (0 + 1 + 2)'
  (and
    (range
      ('symbol', '2')
      ('symbol', '0'))
    (group
      (or
        (list
          ('symbol', '0')
          ('symbol', '1')
          ('symbol', '2')))))
  * optimized:
  (and
    (range
      ('symbol', '2')
      ('symbol', '0')
      define)
    (func
      ('symbol', '_list')
      ('string', '0\x001\x002')
      follow)
    define)
  * set:
  <filteredset
    <spanset- 0:2>,
    <baseset [0, 1, 2]>>
  2
  1
  0

 'A + B' should take the ordering of the left expression:

  $ try --optimize '2:0 & (0:1 + 2)'
  (and
    (range
      ('symbol', '2')
      ('symbol', '0'))
    (group
      (or
        (list
          (range
            ('symbol', '0')
            ('symbol', '1'))
          ('symbol', '2')))))
  * optimized:
  (and
    (range
      ('symbol', '2')
      ('symbol', '0')
      define)
    (or
      (list
        (range
          ('symbol', '0')
          ('symbol', '1')
          follow)
        ('symbol', '2'))
      follow)
    define)
  * set:
  <filteredset
    <spanset- 0:2>,
    <addset
      <spanset+ 0:1>,
      <baseset [2]>>>
  2
  1
  0

 '_intlist(a b)' should behave like 'a + b':

  $ trylist --optimize '2:0 & %ld' 0 1 2
  (and
    (range
      ('symbol', '2')
      ('symbol', '0'))
    (func
      ('symbol', '_intlist')
      ('string', '0\x001\x002')))
  * optimized:
  (and
    (func
      ('symbol', '_intlist')
      ('string', '0\x001\x002')
      follow)
    (range
      ('symbol', '2')
      ('symbol', '0')
      define)
    define)
  * set:
  <filteredset
    <spanset- 0:2>,
    <baseset+ [0, 1, 2]>>
  2
  1
  0

  $ trylist --optimize '%ld & 2:0' 0 2 1
  (and
    (func
      ('symbol', '_intlist')
      ('string', '0\x002\x001'))
    (range
      ('symbol', '2')
      ('symbol', '0')))
  * optimized:
  (and
    (func
      ('symbol', '_intlist')
      ('string', '0\x002\x001')
      define)
    (range
      ('symbol', '2')
      ('symbol', '0')
      follow)
    define)
  * set:
  <filteredset
    <baseset [0, 2, 1]>,
    <spanset- 0:2>>
  0
  2
  1

 '_hexlist(a b)' should behave like 'a + b':

  $ trylist --optimize --bin '2:0 & %ln' `hg log -T '{node} ' -r0:2`
  (and
    (range
      ('symbol', '2')
      ('symbol', '0'))
    (func
      ('symbol', '_hexlist')
      ('string', '*'))) (glob)
  * optimized:
  (and
    (range
      ('symbol', '2')
      ('symbol', '0')
      define)
    (func
      ('symbol', '_hexlist')
      ('string', '*') (glob)
      follow)
    define)
  * set:
  <filteredset
    <spanset- 0:2>,
    <baseset [0, 1, 2]>>
  2
  1
  0

  $ trylist --optimize --bin '%ln & 2:0' `hg log -T '{node} ' -r0+2+1`
  (and
    (func
      ('symbol', '_hexlist')
      ('string', '*')) (glob)
    (range
      ('symbol', '2')
      ('symbol', '0')))
  * optimized:
  (and
    (range
      ('symbol', '2')
      ('symbol', '0')
      follow)
    (func
      ('symbol', '_hexlist')
      ('string', '*') (glob)
      define)
    define)
  * set:
  <baseset [0, 2, 1]>
  0
  2
  1

 '_list' should not go through the slow follow-order path if order doesn't
 matter:

  $ try -p optimized '2:0 & not (0 + 1)'
  * optimized:
  (difference
    (range
      ('symbol', '2')
      ('symbol', '0')
      define)
    (func
      ('symbol', '_list')
      ('string', '0\x001')
      any)
    define)
  * set:
  <filteredset
    <spanset- 0:2>,
    <not
      <baseset [0, 1]>>>
  2

  $ try -p optimized '2:0 & not (0:2 & (0 + 1))'
  * optimized:
  (difference
    (range
      ('symbol', '2')
      ('symbol', '0')
      define)
    (and
      (range
        ('symbol', '0')
        ('symbol', '2')
        any)
      (func
        ('symbol', '_list')
        ('string', '0\x001')
        any)
      any)
    define)
  * set:
  <filteredset
    <spanset- 0:2>,
    <not
      <baseset [0, 1]>>>
  2

 because 'present()' does nothing other than suppressing an error, the
 ordering requirement should be forwarded to the nested expression

  $ try -p optimized 'present(2 + 0 + 1)'
  * optimized:
  (func
    ('symbol', 'present')
    (func
      ('symbol', '_list')
      ('string', '2\x000\x001')
      define)
    define)
  * set:
  <baseset [2, 0, 1]>
  2
  0
  1

  $ try --optimize '2:0 & present(0 + 1 + 2)'
  (and
    (range
      ('symbol', '2')
      ('symbol', '0'))
    (func
      ('symbol', 'present')
      (or
        (list
          ('symbol', '0')
          ('symbol', '1')
          ('symbol', '2')))))
  * optimized:
  (and
    (range
      ('symbol', '2')
      ('symbol', '0')
      define)
    (func
      ('symbol', 'present')
      (func
        ('symbol', '_list')
        ('string', '0\x001\x002')
        follow)
      follow)
    define)
  * set:
  <filteredset
    <spanset- 0:2>,
    <baseset [0, 1, 2]>>
  2
  1
  0

 'reverse()' should take effect only if it is the outermost expression:

  $ try --optimize '0:2 & reverse(all())'
  (and
    (range
      ('symbol', '0')
      ('symbol', '2'))
    (func
      ('symbol', 'reverse')
      (func
        ('symbol', 'all')
        None)))
  * optimized:
  (and
    (range
      ('symbol', '0')
      ('symbol', '2')
      define)
    (func
      ('symbol', 'reverse')
      (func
        ('symbol', 'all')
        None
        define)
      follow)
    define)
  * set:
  <filteredset
    <spanset+ 0:2>,
    <spanset+ 0:9>>
  0
  1
  2

 'sort()' should take effect only if it is the outermost expression:

  $ try --optimize '0:2 & sort(all(), -rev)'
  (and
    (range
      ('symbol', '0')
      ('symbol', '2'))
    (func
      ('symbol', 'sort')
      (list
        (func
          ('symbol', 'all')
          None)
        (negate
          ('symbol', 'rev')))))
  * optimized:
  (and
    (range
      ('symbol', '0')
      ('symbol', '2')
      define)
    (func
      ('symbol', 'sort')
      (list
        (func
          ('symbol', 'all')
          None
          define)
        ('string', '-rev'))
      follow)
    define)
  * set:
  <filteredset
    <spanset+ 0:2>,
    <spanset+ 0:9>>
  0
  1
  2

 invalid argument passed to noop sort():

  $ log '0:2 & sort()'
  hg: parse error: sort requires one or two arguments
  [255]
  $ log '0:2 & sort(all(), -invalid)'
  hg: parse error: unknown sort key '-invalid'
  [255]

 for 'A & f(B)', 'B' should not be affected by the order of 'A':

  $ try --optimize '2:0 & first(1 + 0 + 2)'
  (and
    (range
      ('symbol', '2')
      ('symbol', '0'))
    (func
      ('symbol', 'first')
      (or
        (list
          ('symbol', '1')
          ('symbol', '0')
          ('symbol', '2')))))
  * optimized:
  (and
    (range
      ('symbol', '2')
      ('symbol', '0')
      define)
    (func
      ('symbol', 'first')
      (func
        ('symbol', '_list')
        ('string', '1\x000\x002')
        define)
      follow)
    define)
  * set:
  <baseset
    <limit n=1, offset=0,
      <spanset- 0:2>,
      <baseset [1, 0, 2]>>>
  1

  $ try --optimize '2:0 & not last(0 + 2 + 1)'
  (and
    (range
      ('symbol', '2')
      ('symbol', '0'))
    (not
      (func
        ('symbol', 'last')
        (or
          (list
            ('symbol', '0')
            ('symbol', '2')
            ('symbol', '1'))))))
  * optimized:
  (difference
    (range
      ('symbol', '2')
      ('symbol', '0')
      define)
    (func
      ('symbol', 'last')
      (func
        ('symbol', '_list')
        ('string', '0\x002\x001')
        define)
      any)
    define)
  * set:
  <filteredset
    <spanset- 0:2>,
    <not
      <baseset
        <last n=1,
          <fullreposet+ 0:9>,
          <baseset [1, 2, 0]>>>>>
  2
  0

 for 'A & (op)(B)', 'B' should not be affected by the order of 'A':

  $ try --optimize '2:0 & (1 + 0 + 2):(0 + 2 + 1)'
  (and
    (range
      ('symbol', '2')
      ('symbol', '0'))
    (range
      (group
        (or
          (list
            ('symbol', '1')
            ('symbol', '0')
            ('symbol', '2'))))
      (group
        (or
          (list
            ('symbol', '0')
            ('symbol', '2')
            ('symbol', '1'))))))
  * optimized:
  (and
    (range
      ('symbol', '2')
      ('symbol', '0')
      define)
    (range
      (func
        ('symbol', '_list')
        ('string', '1\x000\x002')
        define)
      (func
        ('symbol', '_list')
        ('string', '0\x002\x001')
        define)
      follow)
    define)
  * set:
  <filteredset
    <spanset- 0:2>,
    <baseset [1]>>
  1

 'A & B' can be rewritten as 'B & A' by weight, but that's fine as long as
 the ordering rule is determined before the rewrite; in this example,
 'B' follows the order of the initial set, which is the same order as 'A'
 since 'A' also follows the order:

  $ try --optimize 'contains("glob:*") & (2 + 0 + 1)'
  (and
    (func
      ('symbol', 'contains')
      ('string', 'glob:*'))
    (group
      (or
        (list
          ('symbol', '2')
          ('symbol', '0')
          ('symbol', '1')))))
  * optimized:
  (and
    (func
      ('symbol', '_list')
      ('string', '2\x000\x001')
      follow)
    (func
      ('symbol', 'contains')
      ('string', 'glob:*')
      define)
    define)
  * set:
  <filteredset
    <baseset+ [0, 1, 2]>,
    <contains 'glob:*'>>
  0
  1
  2

 and in this example, 'A & B' is rewritten as 'B & A', but 'A' overrides
 the order appropriately:

  $ try --optimize 'reverse(contains("glob:*")) & (0 + 2 + 1)'
  (and
    (func
      ('symbol', 'reverse')
      (func
        ('symbol', 'contains')
        ('string', 'glob:*')))
    (group
      (or
        (list
          ('symbol', '0')
          ('symbol', '2')
          ('symbol', '1')))))
  * optimized:
  (and
    (func
      ('symbol', '_list')
      ('string', '0\x002\x001')
      follow)
    (func
      ('symbol', 'reverse')
      (func
        ('symbol', 'contains')
        ('string', 'glob:*')
        define)
      define)
    define)
  * set:
  <filteredset
    <baseset- [0, 1, 2]>,
    <contains 'glob:*'>>
  2
  1
  0

test sort revset
--------------------------------------------

test when adding two unordered revsets

  $ log 'sort(keyword(issue) or modifies(b))'
  4
  6

test when sorting a reversed collection in the same way it is

  $ log 'sort(reverse(all()), -rev)'
  9
  8
  7
  6
  5
  4
  3
  2
  1
  0

test when sorting a reversed collection

  $ log 'sort(reverse(all()), rev)'
  0
  1
  2
  3
  4
  5
  6
  7
  8
  9


test sorting two sorted collections in different orders

  $ log 'sort(outgoing() or reverse(removes(a)), rev)'
  2
  6
  8
  9

test sorting two sorted collections in different orders backwards

  $ log 'sort(outgoing() or reverse(removes(a)), -rev)'
  9
  8
  6
  2

test empty sort key which is noop

  $ log 'sort(0 + 2 + 1, "")'
  0
  2
  1

test invalid sort keys

  $ log 'sort(all(), -invalid)'
  hg: parse error: unknown sort key '-invalid'
  [255]

  $ cd ..

test sorting by multiple keys including variable-length strings

  $ hg init sorting
  $ cd sorting
  $ cat <<EOF >> .hg/hgrc
  > [ui]
  > logtemplate = '{rev} {branch|p5}{desc|p5}{author|p5}{date|hgdate}\n'
  > [templatealias]
  > p5(s) = pad(s, 5)
  > EOF
  $ hg branch -qf b12
  $ hg ci -m m111 -u u112 -d '111 10800'
  $ hg branch -qf b11
  $ hg ci -m m12 -u u111 -d '112 7200'
  $ hg branch -qf b111
  $ hg ci -m m11 -u u12 -d '111 3600'
  $ hg branch -qf b112
  $ hg ci -m m111 -u u11 -d '120 0'
  $ hg branch -qf b111
  $ hg ci -m m112 -u u111 -d '110 14400'
  created new head

 compare revisions (has fast path):

  $ hg log -r 'sort(all(), rev)'
  0 b12  m111 u112 111 10800
  1 b11  m12  u111 112 7200
  2 b111 m11  u12  111 3600
  3 b112 m111 u11  120 0
  4 b111 m112 u111 110 14400

  $ hg log -r 'sort(all(), -rev)'
  4 b111 m112 u111 110 14400
  3 b112 m111 u11  120 0
  2 b111 m11  u12  111 3600
  1 b11  m12  u111 112 7200
  0 b12  m111 u112 111 10800

 compare variable-length strings (issue5218):

  $ hg log -r 'sort(all(), branch)'
  1 b11  m12  u111 112 7200
  2 b111 m11  u12  111 3600
  4 b111 m112 u111 110 14400
  3 b112 m111 u11  120 0
  0 b12  m111 u112 111 10800

  $ hg log -r 'sort(all(), -branch)'
  0 b12  m111 u112 111 10800
  3 b112 m111 u11  120 0
  2 b111 m11  u12  111 3600
  4 b111 m112 u111 110 14400
  1 b11  m12  u111 112 7200

  $ hg log -r 'sort(all(), desc)'
  2 b111 m11  u12  111 3600
  0 b12  m111 u112 111 10800
  3 b112 m111 u11  120 0
  4 b111 m112 u111 110 14400
  1 b11  m12  u111 112 7200

  $ hg log -r 'sort(all(), -desc)'
  1 b11  m12  u111 112 7200
  4 b111 m112 u111 110 14400
  0 b12  m111 u112 111 10800
  3 b112 m111 u11  120 0
  2 b111 m11  u12  111 3600

  $ hg log -r 'sort(all(), user)'
  3 b112 m111 u11  120 0
  1 b11  m12  u111 112 7200
  4 b111 m112 u111 110 14400
  0 b12  m111 u112 111 10800
  2 b111 m11  u12  111 3600

  $ hg log -r 'sort(all(), -user)'
  2 b111 m11  u12  111 3600
  0 b12  m111 u112 111 10800
  1 b11  m12  u111 112 7200
  4 b111 m112 u111 110 14400
  3 b112 m111 u11  120 0

 compare dates (tz offset should have no effect):

  $ hg log -r 'sort(all(), date)'
  4 b111 m112 u111 110 14400
  0 b12  m111 u112 111 10800
  2 b111 m11  u12  111 3600
  1 b11  m12  u111 112 7200
  3 b112 m111 u11  120 0

  $ hg log -r 'sort(all(), -date)'
  3 b112 m111 u11  120 0
  1 b11  m12  u111 112 7200
  0 b12  m111 u112 111 10800
  2 b111 m11  u12  111 3600
  4 b111 m112 u111 110 14400

 be aware that 'sort(x, -k)' is not exactly the same as 'reverse(sort(x, k))'
 because '-k' reverses the comparison, not the list itself:

  $ hg log -r 'sort(0 + 2, date)'
  0 b12  m111 u112 111 10800
  2 b111 m11  u12  111 3600

  $ hg log -r 'sort(0 + 2, -date)'
  0 b12  m111 u112 111 10800
  2 b111 m11  u12  111 3600

  $ hg log -r 'reverse(sort(0 + 2, date))'
  2 b111 m11  u12  111 3600
  0 b12  m111 u112 111 10800

 sort by multiple keys:

  $ hg log -r 'sort(all(), "branch -rev")'
  1 b11  m12  u111 112 7200
  4 b111 m112 u111 110 14400
  2 b111 m11  u12  111 3600
  3 b112 m111 u11  120 0
  0 b12  m111 u112 111 10800

  $ hg log -r 'sort(all(), "-desc -date")'
  1 b11  m12  u111 112 7200
  4 b111 m112 u111 110 14400
  3 b112 m111 u11  120 0
  0 b12  m111 u112 111 10800
  2 b111 m11  u12  111 3600

  $ hg log -r 'sort(all(), "user -branch date rev")'
  3 b112 m111 u11  120 0
  4 b111 m112 u111 110 14400
  1 b11  m12  u111 112 7200
  0 b12  m111 u112 111 10800
  2 b111 m11  u12  111 3600

 toposort prioritises graph branches

  $ hg up 2
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ touch a
  $ hg addremove
  adding a
  $ hg ci -m 't1' -u 'tu' -d '130 0'
  created new head
  $ echo 'a' >> a
  $ hg ci -m 't2' -u 'tu' -d '130 0'
  $ hg book book1
  $ hg up 4
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  (leaving bookmark book1)
  $ touch a
  $ hg addremove
  adding a
  $ hg ci -m 't3' -u 'tu' -d '130 0'

  $ hg log -r 'sort(all(), topo)'
  7 b111 t3   tu   130 0
  4 b111 m112 u111 110 14400
  3 b112 m111 u11  120 0
  6 b111 t2   tu   130 0
  5 b111 t1   tu   130 0
  2 b111 m11  u12  111 3600
  1 b11  m12  u111 112 7200
  0 b12  m111 u112 111 10800

  $ hg log -r 'sort(all(), -topo)'
  0 b12  m111 u112 111 10800
  1 b11  m12  u111 112 7200
  2 b111 m11  u12  111 3600
  5 b111 t1   tu   130 0
  6 b111 t2   tu   130 0
  3 b112 m111 u11  120 0
  4 b111 m112 u111 110 14400
  7 b111 t3   tu   130 0

  $ hg log -r 'sort(all(), topo, topo.firstbranch=book1)'
  6 b111 t2   tu   130 0
  5 b111 t1   tu   130 0
  7 b111 t3   tu   130 0
  4 b111 m112 u111 110 14400
  3 b112 m111 u11  120 0
  2 b111 m11  u12  111 3600
  1 b11  m12  u111 112 7200
  0 b12  m111 u112 111 10800

topographical sorting can't be combined with other sort keys, and you can't
use the topo.firstbranch option when topo sort is not active:

  $ hg log -r 'sort(all(), "topo user")'
  hg: parse error: topo sort order cannot be combined with other sort keys
  [255]

  $ hg log -r 'sort(all(), user, topo.firstbranch=book1)'
  hg: parse error: topo.firstbranch can only be used when using the topo sort key
  [255]

topo.firstbranch should accept any kind of expressions:

  $ hg log -r 'sort(0, topo, topo.firstbranch=(book1))'
  0 b12  m111 u112 111 10800

  $ cd ..
  $ cd repo

test subtracting something from an addset

  $ log '(outgoing() or removes(a)) - removes(a)'
  8
  9

test intersecting something with an addset

  $ log 'parents(outgoing() or removes(a))'
  1
  4
  5
  8

test that `or` operation combines elements in the right order:

  $ log '3:4 or 2:5'
  3
  4
  2
  5
  $ log '3:4 or 5:2'
  3
  4
  5
  2
  $ log 'sort(3:4 or 2:5)'
  2
  3
  4
  5
  $ log 'sort(3:4 or 5:2)'
  2
  3
  4
  5

test that more than one `-r`s are combined in the right order and deduplicated:

  $ hg log -T '{rev}\n' -r 3 -r 3 -r 4 -r 5:2 -r 'ancestors(4)'
  3
  4
  5
  2
  0
  1

test that `or` operation skips duplicated revisions from right-hand side

  $ try 'reverse(1::5) or ancestors(4)'
  (or
    (list
      (func
        ('symbol', 'reverse')
        (dagrange
          ('symbol', '1')
          ('symbol', '5')))
      (func
        ('symbol', 'ancestors')
        ('symbol', '4'))))
  * set:
  <addset
    <baseset- [1, 3, 5]>,
    <generatorset+>>
  5
  3
  1
  0
  2
  4
  $ try 'sort(ancestors(4) or reverse(1::5))'
  (func
    ('symbol', 'sort')
    (or
      (list
        (func
          ('symbol', 'ancestors')
          ('symbol', '4'))
        (func
          ('symbol', 'reverse')
          (dagrange
            ('symbol', '1')
            ('symbol', '5'))))))
  * set:
  <addset+
    <generatorset+>,
    <baseset- [1, 3, 5]>>
  0
  1
  2
  3
  4
  5

test optimization of trivial `or` operation

  $ try --optimize '0|(1)|"2"|-2|tip|null'
  (or
    (list
      ('symbol', '0')
      (group
        ('symbol', '1'))
      ('string', '2')
      (negate
        ('symbol', '2'))
      ('symbol', 'tip')
      ('symbol', 'null')))
  * optimized:
  (func
    ('symbol', '_list')
    ('string', '0\x001\x002\x00-2\x00tip\x00null')
    define)
  * set:
  <baseset [0, 1, 2, 8, 9, -1]>
  0
  1
  2
  8
  9
  -1

  $ try --optimize '0|1|2:3'
  (or
    (list
      ('symbol', '0')
      ('symbol', '1')
      (range
        ('symbol', '2')
        ('symbol', '3'))))
  * optimized:
  (or
    (list
      (func
        ('symbol', '_list')
        ('string', '0\x001')
        define)
      (range
        ('symbol', '2')
        ('symbol', '3')
        define))
    define)
  * set:
  <addset
    <baseset [0, 1]>,
    <spanset+ 2:3>>
  0
  1
  2
  3

  $ try --optimize '0:1|2|3:4|5|6'
  (or
    (list
      (range
        ('symbol', '0')
        ('symbol', '1'))
      ('symbol', '2')
      (range
        ('symbol', '3')
        ('symbol', '4'))
      ('symbol', '5')
      ('symbol', '6')))
  * optimized:
  (or
    (list
      (range
        ('symbol', '0')
        ('symbol', '1')
        define)
      ('symbol', '2')
      (range
        ('symbol', '3')
        ('symbol', '4')
        define)
      (func
        ('symbol', '_list')
        ('string', '5\x006')
        define))
    define)
  * set:
  <addset
    <addset
      <spanset+ 0:1>,
      <baseset [2]>>,
    <addset
      <spanset+ 3:4>,
      <baseset [5, 6]>>>
  0
  1
  2
  3
  4
  5
  6

unoptimized `or` looks like this

  $ try --no-optimized -p analyzed '0|1|2|3|4'
  * analyzed:
  (or
    (list
      ('symbol', '0')
      ('symbol', '1')
      ('symbol', '2')
      ('symbol', '3')
      ('symbol', '4'))
    define)
  * set:
  <addset
    <addset
      <baseset [0]>,
      <baseset [1]>>,
    <addset
      <baseset [2]>,
      <addset
        <baseset [3]>,
        <baseset [4]>>>>
  0
  1
  2
  3
  4

test that `_list` should be narrowed by provided `subset`

  $ log '0:2 and (null|1|2|3)'
  1
  2

test that `_list` should remove duplicates

  $ log '0|1|2|1|2|-1|tip'
  0
  1
  2
  9

test unknown revision in `_list`

  $ log '0|unknown'
  abort: unknown revision 'unknown'!
  [255]

test integer range in `_list`

  $ log '-1|-10'
  9
  0

  $ log '-10|-11'
  abort: unknown revision '-11'!
  [255]

  $ log '9|10'
  abort: unknown revision '10'!
  [255]

test '0000' != '0' in `_list`

  $ log '0|0000'
  0
  -1

test ',' in `_list`
  $ log '0,1'
  hg: parse error: can't use a list in this context
  (see hg help "revsets.x or y")
  [255]
  $ try '0,1,2'
  (list
    ('symbol', '0')
    ('symbol', '1')
    ('symbol', '2'))
  hg: parse error: can't use a list in this context
  (see hg help "revsets.x or y")
  [255]

test that chained `or` operations make balanced addsets

  $ try '0:1|1:2|2:3|3:4|4:5'
  (or
    (list
      (range
        ('symbol', '0')
        ('symbol', '1'))
      (range
        ('symbol', '1')
        ('symbol', '2'))
      (range
        ('symbol', '2')
        ('symbol', '3'))
      (range
        ('symbol', '3')
        ('symbol', '4'))
      (range
        ('symbol', '4')
        ('symbol', '5'))))
  * set:
  <addset
    <addset
      <spanset+ 0:1>,
      <spanset+ 1:2>>,
    <addset
      <spanset+ 2:3>,
      <addset
        <spanset+ 3:4>,
        <spanset+ 4:5>>>>
  0
  1
  2
  3
  4
  5

no crash by empty group "()" while optimizing `or` operations

  $ try --optimize '0|()'
  (or
    (list
      ('symbol', '0')
      (group
        None)))
  * optimized:
  (or
    (list
      ('symbol', '0')
      None)
    define)
  hg: parse error: missing argument
  [255]

test that chained `or` operations never eat up stack (issue4624)
(uses `0:1` instead of `0` to avoid future optimization of trivial revisions)

  $ hg log -T '{rev}\n' -r `python -c "print '+'.join(['0:1'] * 500)"`
  0
  1

test that repeated `-r` options never eat up stack (issue4565)
(uses `-r 0::1` to avoid possible optimization at old-style parser)

  $ hg log -T '{rev}\n' `python -c "for i in xrange(500): print '-r 0::1 ',"`
  0
  1

check that conversion to only works
  $ try --optimize '::3 - ::1'
  (minus
    (dagrangepre
      ('symbol', '3'))
    (dagrangepre
      ('symbol', '1')))
  * optimized:
  (func
    ('symbol', 'only')
    (list
      ('symbol', '3')
      ('symbol', '1'))
    define)
  * set:
  <baseset+ [3]>
  3
  $ try --optimize 'ancestors(1) - ancestors(3)'
  (minus
    (func
      ('symbol', 'ancestors')
      ('symbol', '1'))
    (func
      ('symbol', 'ancestors')
      ('symbol', '3')))
  * optimized:
  (func
    ('symbol', 'only')
    (list
      ('symbol', '1')
      ('symbol', '3'))
    define)
  * set:
  <baseset+ []>
  $ try --optimize 'not ::2 and ::6'
  (and
    (not
      (dagrangepre
        ('symbol', '2')))
    (dagrangepre
      ('symbol', '6')))
  * optimized:
  (func
    ('symbol', 'only')
    (list
      ('symbol', '6')
      ('symbol', '2'))
    define)
  * set:
  <baseset+ [3, 4, 5, 6]>
  3
  4
  5
  6
  $ try --optimize 'ancestors(6) and not ancestors(4)'
  (and
    (func
      ('symbol', 'ancestors')
      ('symbol', '6'))
    (not
      (func
        ('symbol', 'ancestors')
        ('symbol', '4'))))
  * optimized:
  (func
    ('symbol', 'only')
    (list
      ('symbol', '6')
      ('symbol', '4'))
    define)
  * set:
  <baseset+ [3, 5, 6]>
  3
  5
  6

no crash by empty group "()" while optimizing to "only()"

  $ try --optimize '::1 and ()'
  (and
    (dagrangepre
      ('symbol', '1'))
    (group
      None))
  * optimized:
  (and
    None
    (func
      ('symbol', 'ancestors')
      ('symbol', '1')
      define)
    define)
  hg: parse error: missing argument
  [255]

invalid function call should not be optimized to only()

  $ log '"ancestors"(6) and not ancestors(4)'
  hg: parse error: not a symbol
  [255]

  $ log 'ancestors(6) and not "ancestors"(4)'
  hg: parse error: not a symbol
  [255]

we can use patterns when searching for tags

  $ log 'tag("1..*")'
  abort: tag '1..*' does not exist!
  [255]
  $ log 'tag("re:1..*")'
  6
  $ log 'tag("re:[0-9].[0-9]")'
  6
  $ log 'tag("literal:1.0")'
  6
  $ log 'tag("re:0..*")'

  $ log 'tag(unknown)'
  abort: tag 'unknown' does not exist!
  [255]
  $ log 'tag("re:unknown")'
  $ log 'present(tag("unknown"))'
  $ log 'present(tag("re:unknown"))'
  $ log 'branch(unknown)'
  abort: unknown revision 'unknown'!
  [255]
  $ log 'branch("literal:unknown")'
  abort: branch 'unknown' does not exist!
  [255]
  $ log 'branch("re:unknown")'
  $ log 'present(branch("unknown"))'
  $ log 'present(branch("re:unknown"))'
  $ log 'user(bob)'
  2

  $ log '4::8'
  4
  8
  $ log '4:8'
  4
  5
  6
  7
  8

  $ log 'sort(!merge() & (modifies(b) | user(bob) | keyword(bug) | keyword(issue) & 1::9), "-date")'
  4
  2
  5

  $ log 'not 0 and 0:2'
  1
  2
  $ log 'not 1 and 0:2'
  0
  2
  $ log 'not 2 and 0:2'
  0
  1
  $ log '(1 and 2)::'
  $ log '(1 and 2):'
  $ log '(1 and 2):3'
  $ log 'sort(head(), -rev)'
  9
  7
  6
  5
  4
  3
  2
  1
  0
  $ log '4::8 - 8'
  4

matching() should preserve the order of the input set:

  $ log '(2 or 3 or 1) and matching(1 or 2 or 3)'
  2
  3
  1

  $ log 'named("unknown")'
  abort: namespace 'unknown' does not exist!
  [255]
  $ log 'named("re:unknown")'
  abort: no namespace exists that match 'unknown'!
  [255]
  $ log 'present(named("unknown"))'
  $ log 'present(named("re:unknown"))'

  $ log 'tag()'
  6
  $ log 'named("tags")'
  6

issue2437

  $ log '3 and p1(5)'
  3
  $ log '4 and p2(6)'
  4
  $ log '1 and parents(:2)'
  1
  $ log '2 and children(1:)'
  2
  $ log 'roots(all()) or roots(all())'
  0
  $ hg debugrevspec 'roots(all()) or roots(all())'
  0
  $ log 'heads(branch(é)) or heads(branch(é))'
  9
  $ log 'ancestors(8) and (heads(branch("-a-b-c-")) or heads(branch(é)))'
  4

issue2654: report a parse error if the revset was not completely parsed

  $ log '1 OR 2'
  hg: parse error at 2: invalid token
  [255]

or operator should preserve ordering:
  $ log 'reverse(2::4) or tip'
  4
  2
  9

parentrevspec

  $ log 'merge()^0'
  6
  $ log 'merge()^'
  5
  $ log 'merge()^1'
  5
  $ log 'merge()^2'
  4
  $ log 'merge()^^'
  3
  $ log 'merge()^1^'
  3
  $ log 'merge()^^^'
  1

  $ log 'merge()~0'
  6
  $ log 'merge()~1'
  5
  $ log 'merge()~2'
  3
  $ log 'merge()~2^1'
  1
  $ log 'merge()~3'
  1

  $ log '(-3:tip)^'
  4
  6
  8

  $ log 'tip^foo'
  hg: parse error: ^ expects a number 0, 1, or 2
  [255]

Bogus function gets suggestions
  $ log 'add()'
  hg: parse error: unknown identifier: add
  (did you mean adds?)
  [255]
  $ log 'added()'
  hg: parse error: unknown identifier: added
  (did you mean adds?)
  [255]
  $ log 'remo()'
  hg: parse error: unknown identifier: remo
  (did you mean one of remote, removes?)
  [255]
  $ log 'babar()'
  hg: parse error: unknown identifier: babar
  [255]

Bogus function with a similar internal name doesn't suggest the internal name
  $ log 'matches()'
  hg: parse error: unknown identifier: matches
  (did you mean matching?)
  [255]

Undocumented functions aren't suggested as similar either
  $ log 'wdir2()'
  hg: parse error: unknown identifier: wdir2
  [255]

multiple revspecs

  $ hg log -r 'tip~1:tip' -r 'tip~2:tip~1' --template '{rev}\n'
  8
  9
  4
  5
  6
  7

test usage in revpair (with "+")

(real pair)

  $ hg diff -r 'tip^^' -r 'tip'
  diff -r 2326846efdab -r 24286f4ae135 .hgtags
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/.hgtags	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +e0cc66ef77e8b6f711815af4e001a6594fde3ba5 1.0
  $ hg diff -r 'tip^^::tip'
  diff -r 2326846efdab -r 24286f4ae135 .hgtags
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/.hgtags	Thu Jan 01 00:00:00 1970 +0000
  @@ -0,0 +1,1 @@
  +e0cc66ef77e8b6f711815af4e001a6594fde3ba5 1.0

(single rev)

  $ hg diff -r 'tip^' -r 'tip^'
  $ hg diff -r 'tip^:tip^'

(single rev that does not looks like a range)

  $ hg diff -r 'tip^::tip^ or tip^'
  diff -r d5d0dcbdc4d9 .hgtags
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/.hgtags	* (glob)
  @@ -0,0 +1,1 @@
  +e0cc66ef77e8b6f711815af4e001a6594fde3ba5 1.0
  $ hg diff -r 'tip^ or tip^'
  diff -r d5d0dcbdc4d9 .hgtags
  --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
  +++ b/.hgtags	* (glob)
  @@ -0,0 +1,1 @@
  +e0cc66ef77e8b6f711815af4e001a6594fde3ba5 1.0

(no rev)

  $ hg diff -r 'author("babar") or author("celeste")'
  abort: empty revision range
  [255]

aliases:

  $ echo '[revsetalias]' >> .hg/hgrc
  $ echo 'm = merge()' >> .hg/hgrc
(revset aliases can override builtin revsets)
  $ echo 'p2($1) = p1($1)' >> .hg/hgrc
  $ echo 'sincem = descendants(m)' >> .hg/hgrc
  $ echo 'd($1) = reverse(sort($1, date))' >> .hg/hgrc
  $ echo 'rs(ARG1, ARG2) = reverse(sort(ARG1, ARG2))' >> .hg/hgrc
  $ echo 'rs4(ARG1, ARGA, ARGB, ARG2) = reverse(sort(ARG1, ARG2))' >> .hg/hgrc

  $ try m
  ('symbol', 'm')
  * expanded:
  (func
    ('symbol', 'merge')
    None)
  * set:
  <filteredset
    <fullreposet+ 0:9>,
    <merge>>
  6

  $ HGPLAIN=1
  $ export HGPLAIN
  $ try m
  ('symbol', 'm')
  abort: unknown revision 'm'!
  [255]

  $ HGPLAINEXCEPT=revsetalias
  $ export HGPLAINEXCEPT
  $ try m
  ('symbol', 'm')
  * expanded:
  (func
    ('symbol', 'merge')
    None)
  * set:
  <filteredset
    <fullreposet+ 0:9>,
    <merge>>
  6

  $ unset HGPLAIN
  $ unset HGPLAINEXCEPT

  $ try 'p2(.)'
  (func
    ('symbol', 'p2')
    ('symbol', '.'))
  * expanded:
  (func
    ('symbol', 'p1')
    ('symbol', '.'))
  * set:
  <baseset+ [8]>
  8

  $ HGPLAIN=1
  $ export HGPLAIN
  $ try 'p2(.)'
  (func
    ('symbol', 'p2')
    ('symbol', '.'))
  * set:
  <baseset+ []>

  $ HGPLAINEXCEPT=revsetalias
  $ export HGPLAINEXCEPT
  $ try 'p2(.)'
  (func
    ('symbol', 'p2')
    ('symbol', '.'))
  * expanded:
  (func
    ('symbol', 'p1')
    ('symbol', '.'))
  * set:
  <baseset+ [8]>
  8

  $ unset HGPLAIN
  $ unset HGPLAINEXCEPT

test alias recursion

  $ try sincem
  ('symbol', 'sincem')
  * expanded:
  (func
    ('symbol', 'descendants')
    (func
      ('symbol', 'merge')
      None))
  * set:
  <addset+
    <filteredset
      <fullreposet+ 0:9>,
      <merge>>,
    <generatorset+>>
  6
  7

test infinite recursion

  $ echo 'recurse1 = recurse2' >> .hg/hgrc
  $ echo 'recurse2 = recurse1' >> .hg/hgrc
  $ try recurse1
  ('symbol', 'recurse1')
  hg: parse error: infinite expansion of revset alias "recurse1" detected
  [255]

  $ echo 'level1($1, $2) = $1 or $2' >> .hg/hgrc
  $ echo 'level2($1, $2) = level1($2, $1)' >> .hg/hgrc
  $ try "level2(level1(1, 2), 3)"
  (func
    ('symbol', 'level2')
    (list
      (func
        ('symbol', 'level1')
        (list
          ('symbol', '1')
          ('symbol', '2')))
      ('symbol', '3')))
  * expanded:
  (or
    (list
      ('symbol', '3')
      (or
        (list
          ('symbol', '1')
          ('symbol', '2')))))
  * set:
  <addset
    <baseset [3]>,
    <baseset [1, 2]>>
  3
  1
  2

test nesting and variable passing

  $ echo 'nested($1) = nested2($1)' >> .hg/hgrc
  $ echo 'nested2($1) = nested3($1)' >> .hg/hgrc
  $ echo 'nested3($1) = max($1)' >> .hg/hgrc
  $ try 'nested(2:5)'
  (func
    ('symbol', 'nested')
    (range
      ('symbol', '2')
      ('symbol', '5')))
  * expanded:
  (func
    ('symbol', 'max')
    (range
      ('symbol', '2')
      ('symbol', '5')))
  * set:
  <baseset
    <max
      <fullreposet+ 0:9>,
      <spanset+ 2:5>>>
  5

test chained `or` operations are flattened at parsing phase

  $ echo 'chainedorops($1, $2, $3) = $1|$2|$3' >> .hg/hgrc
  $ try 'chainedorops(0:1, 1:2, 2:3)'
  (func
    ('symbol', 'chainedorops')
    (list
      (range
        ('symbol', '0')
        ('symbol', '1'))
      (range
        ('symbol', '1')
        ('symbol', '2'))
      (range
        ('symbol', '2')
        ('symbol', '3'))))
  * expanded:
  (or
    (list
      (range
        ('symbol', '0')
        ('symbol', '1'))
      (range
        ('symbol', '1')
        ('symbol', '2'))
      (range
        ('symbol', '2')
        ('symbol', '3'))))
  * set:
  <addset
    <spanset+ 0:1>,
    <addset
      <spanset+ 1:2>,
      <spanset+ 2:3>>>
  0
  1
  2
  3

test variable isolation, variable placeholders are rewritten as string
then parsed and matched again as string. Check they do not leak too
far away.

  $ echo 'injectparamasstring = max("$1")' >> .hg/hgrc
  $ echo 'callinjection($1) = descendants(injectparamasstring)' >> .hg/hgrc
  $ try 'callinjection(2:5)'
  (func
    ('symbol', 'callinjection')
    (range
      ('symbol', '2')
      ('symbol', '5')))
  * expanded:
  (func
    ('symbol', 'descendants')
    (func
      ('symbol', 'max')
      ('string', '$1')))
  abort: unknown revision '$1'!
  [255]

test scope of alias expansion: 'universe' is expanded prior to 'shadowall(0)',
but 'all()' should never be substituded to '0()'.

  $ echo 'universe = all()' >> .hg/hgrc
  $ echo 'shadowall(all) = all and universe' >> .hg/hgrc
  $ try 'shadowall(0)'
  (func
    ('symbol', 'shadowall')
    ('symbol', '0'))
  * expanded:
  (and
    ('symbol', '0')
    (func
      ('symbol', 'all')
      None))
  * set:
  <filteredset
    <baseset [0]>,
    <spanset+ 0:9>>
  0

test unknown reference:

  $ try "unknownref(0)" --config 'revsetalias.unknownref($1)=$1:$2'
  (func
    ('symbol', 'unknownref')
    ('symbol', '0'))
  abort: bad definition of revset alias "unknownref": invalid symbol '$2'
  [255]

  $ hg debugrevspec --debug --config revsetalias.anotherbadone='branch(' "tip"
  ('symbol', 'tip')
  warning: bad definition of revset alias "anotherbadone": at 7: not a prefix: end
  * set:
  <baseset [9]>
  9

  $ try 'tip'
  ('symbol', 'tip')
  * set:
  <baseset [9]>
  9

  $ hg debugrevspec --debug --config revsetalias.'bad name'='tip' "tip"
  ('symbol', 'tip')
  warning: bad declaration of revset alias "bad name": at 4: invalid token
  * set:
  <baseset [9]>
  9
  $ echo 'strictreplacing($1, $10) = $10 or desc("$1")' >> .hg/hgrc
  $ try 'strictreplacing("foo", tip)'
  (func
    ('symbol', 'strictreplacing')
    (list
      ('string', 'foo')
      ('symbol', 'tip')))
  * expanded:
  (or
    (list
      ('symbol', 'tip')
      (func
        ('symbol', 'desc')
        ('string', '$1'))))
  * set:
  <addset
    <baseset [9]>,
    <filteredset
      <fullreposet+ 0:9>,
      <desc '$1'>>>
  9

  $ try 'd(2:5)'
  (func
    ('symbol', 'd')
    (range
      ('symbol', '2')
      ('symbol', '5')))
  * expanded:
  (func
    ('symbol', 'reverse')
    (func
      ('symbol', 'sort')
      (list
        (range
          ('symbol', '2')
          ('symbol', '5'))
        ('symbol', 'date'))))
  * set:
  <baseset [4, 5, 3, 2]>
  4
  5
  3
  2
  $ try 'rs(2 or 3, date)'
  (func
    ('symbol', 'rs')
    (list
      (or
        (list
          ('symbol', '2')
          ('symbol', '3')))
      ('symbol', 'date')))
  * expanded:
  (func
    ('symbol', 'reverse')
    (func
      ('symbol', 'sort')
      (list
        (or
          (list
            ('symbol', '2')
            ('symbol', '3')))
        ('symbol', 'date'))))
  * set:
  <baseset [3, 2]>
  3
  2
  $ try 'rs()'
  (func
    ('symbol', 'rs')
    None)
  hg: parse error: invalid number of arguments: 0
  [255]
  $ try 'rs(2)'
  (func
    ('symbol', 'rs')
    ('symbol', '2'))
  hg: parse error: invalid number of arguments: 1
  [255]
  $ try 'rs(2, data, 7)'
  (func
    ('symbol', 'rs')
    (list
      ('symbol', '2')
      ('symbol', 'data')
      ('symbol', '7')))
  hg: parse error: invalid number of arguments: 3
  [255]
  $ try 'rs4(2 or 3, x, x, date)'
  (func
    ('symbol', 'rs4')
    (list
      (or
        (list
          ('symbol', '2')
          ('symbol', '3')))
      ('symbol', 'x')
      ('symbol', 'x')
      ('symbol', 'date')))
  * expanded:
  (func
    ('symbol', 'reverse')
    (func
      ('symbol', 'sort')
      (list
        (or
          (list
            ('symbol', '2')
            ('symbol', '3')))
        ('symbol', 'date'))))
  * set:
  <baseset [3, 2]>
  3
  2

issue4553: check that revset aliases override existing hash prefix

  $ hg log -qr e
  6:e0cc66ef77e8

  $ hg log -qr e --config revsetalias.e="all()"
  0:2785f51eece5
  1:d75937da8da0
  2:5ed5505e9f1c
  3:8528aa5637f2
  4:2326846efdab
  5:904fa392b941
  6:e0cc66ef77e8
  7:013af1973af4
  8:d5d0dcbdc4d9
  9:24286f4ae135

  $ hg log -qr e: --config revsetalias.e="0"
  0:2785f51eece5
  1:d75937da8da0
  2:5ed5505e9f1c
  3:8528aa5637f2
  4:2326846efdab
  5:904fa392b941
  6:e0cc66ef77e8
  7:013af1973af4
  8:d5d0dcbdc4d9
  9:24286f4ae135

  $ hg log -qr :e --config revsetalias.e="9"
  0:2785f51eece5
  1:d75937da8da0
  2:5ed5505e9f1c
  3:8528aa5637f2
  4:2326846efdab
  5:904fa392b941
  6:e0cc66ef77e8
  7:013af1973af4
  8:d5d0dcbdc4d9
  9:24286f4ae135

  $ hg log -qr e:
  6:e0cc66ef77e8
  7:013af1973af4
  8:d5d0dcbdc4d9
  9:24286f4ae135

  $ hg log -qr :e
  0:2785f51eece5
  1:d75937da8da0
  2:5ed5505e9f1c
  3:8528aa5637f2
  4:2326846efdab
  5:904fa392b941
  6:e0cc66ef77e8

issue2549 - correct optimizations

  $ try 'limit(1 or 2 or 3, 2) and not 2'
  (and
    (func
      ('symbol', 'limit')
      (list
        (or
          (list
            ('symbol', '1')
            ('symbol', '2')
            ('symbol', '3')))
        ('symbol', '2')))
    (not
      ('symbol', '2')))
  * set:
  <filteredset
    <baseset
      <limit n=2, offset=0,
        <fullreposet+ 0:9>,
        <baseset [1, 2, 3]>>>,
    <not
      <baseset [2]>>>
  1
  $ try 'max(1 or 2) and not 2'
  (and
    (func
      ('symbol', 'max')
      (or
        (list
          ('symbol', '1')
          ('symbol', '2'))))
    (not
      ('symbol', '2')))
  * set:
  <filteredset
    <baseset
      <max
        <fullreposet+ 0:9>,
        <baseset [1, 2]>>>,
    <not
      <baseset [2]>>>
  $ try 'min(1 or 2) and not 1'
  (and
    (func
      ('symbol', 'min')
      (or
        (list
          ('symbol', '1')
          ('symbol', '2'))))
    (not
      ('symbol', '1')))
  * set:
  <filteredset
    <baseset
      <min
        <fullreposet+ 0:9>,
        <baseset [1, 2]>>>,
    <not
      <baseset [1]>>>
  $ try 'last(1 or 2, 1) and not 2'
  (and
    (func
      ('symbol', 'last')
      (list
        (or
          (list
            ('symbol', '1')
            ('symbol', '2')))
        ('symbol', '1')))
    (not
      ('symbol', '2')))
  * set:
  <filteredset
    <baseset
      <last n=1,
        <fullreposet+ 0:9>,
        <baseset [2, 1]>>>,
    <not
      <baseset [2]>>>

issue4289 - ordering of built-ins
  $ hg log -M -q -r 3:2
  3:8528aa5637f2
  2:5ed5505e9f1c

test revsets started with 40-chars hash (issue3669)

  $ ISSUE3669_TIP=`hg tip --template '{node}'`
  $ hg log -r "${ISSUE3669_TIP}" --template '{rev}\n'
  9
  $ hg log -r "${ISSUE3669_TIP}^" --template '{rev}\n'
  8

test or-ed indirect predicates (issue3775)

  $ log '6 or 6^1' | sort
  5
  6
  $ log '6^1 or 6' | sort
  5
  6
  $ log '4 or 4~1' | sort
  2
  4
  $ log '4~1 or 4' | sort
  2
  4
  $ log '(0 or 2):(4 or 6) or 0 or 6' | sort
  0
  1
  2
  3
  4
  5
  6
  $ log '0 or 6 or (0 or 2):(4 or 6)' | sort
  0
  1
  2
  3
  4
  5
  6

tests for 'remote()' predicate:
#.  (csets in remote) (id)            (remote)
1.  less than local   current branch  "default"
2.  same with local   specified       "default"
3.  more than local   specified       specified

  $ hg clone --quiet -U . ../remote3
  $ cd ../remote3
  $ hg update -q 7
  $ echo r > r
  $ hg ci -Aqm 10
  $ log 'remote()'
  7
  $ log 'remote("a-b-c-")'
  2
  $ cd ../repo
  $ log 'remote(".a.b.c.", "../remote3")'

tests for concatenation of strings/symbols by "##"

  $ try "278 ## '5f5' ## 1ee ## 'ce5'"
  (_concat
    (_concat
      (_concat
        ('symbol', '278')
        ('string', '5f5'))
      ('symbol', '1ee'))
    ('string', 'ce5'))
  * concatenated:
  ('string', '2785f51eece5')
  * set:
  <baseset [0]>
  0

  $ echo 'cat4($1, $2, $3, $4) = $1 ## $2 ## $3 ## $4' >> .hg/hgrc
  $ try "cat4(278, '5f5', 1ee, 'ce5')"
  (func
    ('symbol', 'cat4')
    (list
      ('symbol', '278')
      ('string', '5f5')
      ('symbol', '1ee')
      ('string', 'ce5')))
  * expanded:
  (_concat
    (_concat
      (_concat
        ('symbol', '278')
        ('string', '5f5'))
      ('symbol', '1ee'))
    ('string', 'ce5'))
  * concatenated:
  ('string', '2785f51eece5')
  * set:
  <baseset [0]>
  0

(check concatenation in alias nesting)

  $ echo 'cat2($1, $2) = $1 ## $2' >> .hg/hgrc
  $ echo 'cat2x2($1, $2, $3, $4) = cat2($1 ## $2, $3 ## $4)' >> .hg/hgrc
  $ log "cat2x2(278, '5f5', 1ee, 'ce5')"
  0

(check operator priority)

  $ echo 'cat2n2($1, $2, $3, $4) = $1 ## $2 or $3 ## $4~2' >> .hg/hgrc
  $ log "cat2n2(2785f5, 1eece5, 24286f, 4ae135)"
  0
  4

  $ cd ..

prepare repository that has "default" branches of multiple roots

  $ hg init namedbranch
  $ cd namedbranch

  $ echo default0 >> a
  $ hg ci -Aqm0
  $ echo default1 >> a
  $ hg ci -m1

  $ hg branch -q stable
  $ echo stable2 >> a
  $ hg ci -m2
  $ echo stable3 >> a
  $ hg ci -m3

  $ hg update -q null
  $ echo default4 >> a
  $ hg ci -Aqm4
  $ echo default5 >> a
  $ hg ci -m5

"null" revision belongs to "default" branch (issue4683)

  $ log 'branch(null)'
  0
  1
  4
  5

"null" revision belongs to "default" branch, but it shouldn't appear in set
unless explicitly specified (issue4682)

  $ log 'children(branch(default))'
  1
  2
  5

  $ cd ..

test author/desc/keyword in problematic encoding
# unicode: cp932:
# u30A2    0x83 0x41(= 'A')
# u30C2    0x83 0x61(= 'a')

  $ hg init problematicencoding
  $ cd problematicencoding

  $ python > setup.sh <<EOF
  > print u'''
  > echo a > text
  > hg add text
  > hg --encoding utf-8 commit -u '\u30A2' -m none
  > echo b > text
  > hg --encoding utf-8 commit -u '\u30C2' -m none
  > echo c > text
  > hg --encoding utf-8 commit -u none -m '\u30A2'
  > echo d > text
  > hg --encoding utf-8 commit -u none -m '\u30C2'
  > '''.encode('utf-8')
  > EOF
  $ sh < setup.sh

test in problematic encoding
  $ python > test.sh <<EOF
  > print u'''
  > hg --encoding cp932 log --template '{rev}\\n' -r 'author(\u30A2)'
  > echo ====
  > hg --encoding cp932 log --template '{rev}\\n' -r 'author(\u30C2)'
  > echo ====
  > hg --encoding cp932 log --template '{rev}\\n' -r 'desc(\u30A2)'
  > echo ====
  > hg --encoding cp932 log --template '{rev}\\n' -r 'desc(\u30C2)'
  > echo ====
  > hg --encoding cp932 log --template '{rev}\\n' -r 'keyword(\u30A2)'
  > echo ====
  > hg --encoding cp932 log --template '{rev}\\n' -r 'keyword(\u30C2)'
  > '''.encode('cp932')
  > EOF
  $ sh < test.sh
  0
  ====
  1
  ====
  2
  ====
  3
  ====
  0
  2
  ====
  1
  3

test error message of bad revset
  $ hg log -r 'foo\\'
  hg: parse error at 3: syntax error in revset 'foo\\'
  [255]

  $ cd ..

Test that revset predicate of extension isn't loaded at failure of
loading it

  $ cd repo

  $ cat <<EOF > $TESTTMP/custompredicate.py
  > from mercurial import error, registrar, revset
  > 
  > revsetpredicate = registrar.revsetpredicate()
  > 
  > @revsetpredicate('custom1()')
  > def custom1(repo, subset, x):
  >     return revset.baseset([1])
  > 
  > raise error.Abort('intentional failure of loading extension')
  > EOF
  $ cat <<EOF > .hg/hgrc
  > [extensions]
  > custompredicate = $TESTTMP/custompredicate.py
  > EOF

  $ hg debugrevspec "custom1()"
  *** failed to import extension custompredicate from $TESTTMP/custompredicate.py: intentional failure of loading extension
  hg: parse error: unknown identifier: custom1
  [255]

  $ cd ..