view tests/test-fileset.t @ 42743:8c9a6adec67a

rust-discovery: using the children cache in add_missing

The DAG range computation often needs to get back to very old
revisions, and turns out to be disproportionately long, given
that the end goal is to remove the descendents of the given
missing revisons from the undecided set.

The fast iteration capabilities available in the Rust case make
it possible to avoid the DAG range entirely, at the cost of
precomputing the children cache, and to simply iterate on
children of the given missing revisions.

This is a case where staying on the same side of the interface
between the two languages has clear benefits.

On discoveries with initial undecided sets
small enough to bypass sampling entirely, the total cost of
computing the children cache and the subsequent iteration
becomes better than the Python + C counterpart, which relies on
reachableroots2.

For example, on a repo with more than one million revisions with
an initial undecided set of 11 elements, we get these figures:

Rust version with simple iteration
  addcommons: 57.287us
  first undecided computation: 184.278334ms
  first children cache computation: 131.056us
  addmissings iteration: 42.766us
  first addinfo total: 185.24 ms

Python + C version
  first addcommons: 0.29 ms
  addcommons 0.21 ms
  first undecided computation 191.35 ms
  addmissings 45.75 ms
  first addinfo total: 237.77 ms

On discoveries with large undecided sets, the initial price paid
makes the first addinfo slower than the Python + C version,
but that's more than compensated by the gain in sampling and
subsequent iterations.
Here's an extreme example with an undecided set of a million revisions:

Rust version:
  first undecided computation: 293.842629ms
  first children cache computation: 407.911297ms
  addmissings iteration: 34.312869ms
  first addinfo total: 776.02 ms
  taking initial sample
  query 2: sampling time: 1318.38 ms
  query 2; still undecided: 1005013, sample size is: 200
  addmissings: 143.062us

Python + C version:
  first undecided computation 298.13 ms
  addmissings 80.13 ms
  first addinfo total: 399.62 ms
  taking initial sample
  query 2: sampling time: 3957.23 ms
  query 2; still undecided: 1005013, sample size is: 200
  addmissings 52.88 ms

Differential Revision: https://phab.mercurial-scm.org/D6428

  $ fileset() {
  >   hg debugfileset --all-files "$@"
  > }

  $ hg init repo
  $ cd repo
  $ echo a > a1
  $ echo a > a2
  $ echo b > b1
  $ echo b > b2
  $ hg ci -Am addfiles
  adding a1
  adding a2
  adding b1
  adding b2

Test operators and basic patterns

  $ fileset -v a1
  (symbol 'a1')
  * matcher:
  <patternmatcher patterns='a1$'>
  a1
  $ fileset -v 'a*'
  (symbol 'a*')
  * matcher:
  <patternmatcher patterns='a[^/]*$'>
  a1
  a2
  $ fileset -v '"re:a\d"'
  (string 're:a\\d')
  * matcher:
  <patternmatcher patterns='a\\d'>
  a1
  a2
  $ fileset -v '!re:"a\d"'
  (not
    (kindpat
      (symbol 're')
      (string 'a\\d')))
  * matcher:
  <predicatenmatcher
    pred=<not
      <patternmatcher patterns='a\\d'>>>
  b1
  b2
  $ fileset -v 'path:a1 or glob:b?'
  (or
    (kindpat
      (symbol 'path')
      (symbol 'a1'))
    (kindpat
      (symbol 'glob')
      (symbol 'b?')))
  * matcher:
  <patternmatcher patterns='a1(?:/|$)|b.$'>
  a1
  b1
  b2
  $ fileset -v --no-show-matcher 'a1 or a2'
  (or
    (symbol 'a1')
    (symbol 'a2'))
  a1
  a2
  $ fileset 'a1 | a2'
  a1
  a2
  $ fileset 'a* and "*1"'
  a1
  $ fileset 'a* & "*1"'
  a1
  $ fileset 'not (r"a*")'
  b1
  b2
  $ fileset '! ("a*")'
  b1
  b2
  $ fileset 'a* - a1'
  a2
  $ fileset 'a_b'
  $ fileset '"\xy"'
  hg: parse error: invalid \x escape* (glob)
  [255]

Test invalid syntax

  $ fileset -v '"added"()'
  (func
    (string 'added')
    None)
  hg: parse error: not a symbol
  [255]
  $ fileset -v '()()'
  (func
    (group
      None)
    None)
  hg: parse error: not a symbol
  [255]
  $ fileset -v -- '-x'
  (negate
    (symbol 'x'))
  hg: parse error: can't use negate operator in this context
  [255]
  $ fileset -v -- '-()'
  (negate
    (group
      None))
  hg: parse error: can't use negate operator in this context
  [255]
  $ fileset -p parsed 'a, b, c'
  * parsed:
  (list
    (symbol 'a')
    (symbol 'b')
    (symbol 'c'))
  hg: parse error: can't use a list in this context
  (see 'hg help "filesets.x or y"')
  [255]

  $ fileset '"path":.'
  hg: parse error: not a symbol
  [255]
  $ fileset 'path:foo bar'
  hg: parse error at 9: invalid token
  [255]
  $ fileset 'foo:bar:baz'
  hg: parse error: not a symbol
  [255]
  $ fileset 'foo:bar()'
  hg: parse error: pattern must be a string
  [255]
  $ fileset 'foo:bar'
  hg: parse error: invalid pattern kind: foo
  [255]

Show parsed tree at stages:

  $ fileset -p unknown a
  abort: invalid stage name: unknown
  [255]

  $ fileset -p parsed 'path:a1 or glob:b?'
  * parsed:
  (or
    (kindpat
      (symbol 'path')
      (symbol 'a1'))
    (kindpat
      (symbol 'glob')
      (symbol 'b?')))
  a1
  b1
  b2

  $ fileset -p all -s 'a1 or a2 or (grep("b") & clean())'
  * parsed:
  (or
    (symbol 'a1')
    (symbol 'a2')
    (group
      (and
        (func
          (symbol 'grep')
          (string 'b'))
        (func
          (symbol 'clean')
          None))))
  * analyzed:
  (or
    (symbol 'a1')
    (symbol 'a2')
    (and
      (func
        (symbol 'grep')
        (string 'b'))
      (withstatus
        (func
          (symbol 'clean')
          None)
        (string 'clean'))))
  * optimized:
  (or
    (patterns
      (symbol 'a1')
      (symbol 'a2'))
    (and
      (withstatus
        (func
          (symbol 'clean')
          None)
        (string 'clean'))
      (func
        (symbol 'grep')
        (string 'b'))))
  * matcher:
  <unionmatcher matchers=[
    <patternmatcher patterns='a1$|a2$'>,
    <intersectionmatcher
      m1=<predicatenmatcher pred=clean>,
      m2=<predicatenmatcher pred=grep('b')>>]>
  a1
  a2
  b1
  b2

Union of basic patterns:

  $ fileset -p optimized -s -r. 'a1 or a2 or path:b1'
  * optimized:
  (patterns
    (symbol 'a1')
    (symbol 'a2')
    (kindpat
      (symbol 'path')
      (symbol 'b1')))
  * matcher:
  <patternmatcher patterns='a1$|a2$|b1(?:/|$)'>
  a1
  a2
  b1

OR expression should be reordered by weight:

  $ fileset -p optimized -s -r. 'grep("a") or a1 or grep("b") or b2'
  * optimized:
  (or
    (patterns
      (symbol 'a1')
      (symbol 'b2'))
    (func
      (symbol 'grep')
      (string 'a'))
    (func
      (symbol 'grep')
      (string 'b')))
  * matcher:
  <unionmatcher matchers=[
    <patternmatcher patterns='a1$|b2$'>,
    <predicatenmatcher pred=grep('a')>,
    <predicatenmatcher pred=grep('b')>]>
  a1
  a2
  b1
  b2

Use differencematcher for 'x and not y':

  $ fileset -p optimized -s 'a* and not a1'
  * optimized:
  (minus
    (symbol 'a*')
    (symbol 'a1'))
  * matcher:
  <differencematcher
    m1=<patternmatcher patterns='a[^/]*$'>,
    m2=<patternmatcher patterns='a1$'>>
  a2

  $ fileset -p optimized -s '!binary() and a*'
  * optimized:
  (minus
    (symbol 'a*')
    (func
      (symbol 'binary')
      None))
  * matcher:
  <differencematcher
    m1=<patternmatcher patterns='a[^/]*$'>,
    m2=<predicatenmatcher pred=binary>>
  a1
  a2

'x - y' is rewritten to 'x and not y' first so the operands can be reordered:

  $ fileset -p analyzed -p optimized -s 'a* - a1'
  * analyzed:
  (and
    (symbol 'a*')
    (not
      (symbol 'a1')))
  * optimized:
  (minus
    (symbol 'a*')
    (symbol 'a1'))
  * matcher:
  <differencematcher
    m1=<patternmatcher patterns='a[^/]*$'>,
    m2=<patternmatcher patterns='a1$'>>
  a2

  $ fileset -p analyzed -p optimized -s 'binary() - a*'
  * analyzed:
  (and
    (func
      (symbol 'binary')
      None)
    (not
      (symbol 'a*')))
  * optimized:
  (and
    (not
      (symbol 'a*'))
    (func
      (symbol 'binary')
      None))
  * matcher:
  <intersectionmatcher
    m1=<predicatenmatcher
      pred=<not
        <patternmatcher patterns='a[^/]*$'>>>,
    m2=<predicatenmatcher pred=binary>>

Test files status

  $ rm a1
  $ hg rm a2
  $ echo b >> b2
  $ hg cp b1 c1
  $ echo c > c2
  $ echo c > c3
  $ cat > .hgignore <<EOF
  > \.hgignore
  > 2$
  > EOF
  $ fileset 'modified()'
  b2
  $ fileset 'added()'
  c1
  $ fileset 'removed()'
  a2
  $ fileset 'deleted()'
  a1
  $ fileset 'missing()'
  a1
  $ fileset 'unknown()'
  c3
  $ fileset 'ignored()'
  .hgignore
  c2
  $ fileset 'hgignore()'
  .hgignore
  a2
  b2
  c2
  $ fileset 'clean()'
  b1
  $ fileset 'copied()'
  c1

Test files status in different revisions

  $ hg status -m
  M b2
  $ fileset -r0 'revs("wdir()", modified())' --traceback
  b2
  $ hg status -a
  A c1
  $ fileset -r0 'revs("wdir()", added())'
  c1
  $ hg status --change 0 -a
  A a1
  A a2
  A b1
  A b2
  $ hg status -mru
  M b2
  R a2
  ? c3
  $ fileset -r0 'added() and revs("wdir()", modified() or removed() or unknown())'
  a2
  b2
  $ fileset -r0 'added() or revs("wdir()", added())'
  a1
  a2
  b1
  b2
  c1

Test insertion of status hints

  $ fileset -p optimized 'added()'
  * optimized:
  (withstatus
    (func
      (symbol 'added')
      None)
    (string 'added'))
  c1

  $ fileset -p optimized 'a* & removed()'
  * optimized:
  (and
    (symbol 'a*')
    (withstatus
      (func
        (symbol 'removed')
        None)
      (string 'removed')))
  a2

  $ fileset -p optimized 'a* - removed()'
  * optimized:
  (minus
    (symbol 'a*')
    (withstatus
      (func
        (symbol 'removed')
        None)
      (string 'removed')))
  a1

  $ fileset -p analyzed -p optimized '(added() + removed()) - a*'
  * analyzed:
  (and
    (withstatus
      (or
        (func
          (symbol 'added')
          None)
        (func
          (symbol 'removed')
          None))
      (string 'added removed'))
    (not
      (symbol 'a*')))
  * optimized:
  (and
    (not
      (symbol 'a*'))
    (withstatus
      (or
        (func
          (symbol 'added')
          None)
        (func
          (symbol 'removed')
          None))
      (string 'added removed')))
  c1

  $ fileset -p optimized 'a* + b* + added() + unknown()'
  * optimized:
  (withstatus
    (or
      (patterns
        (symbol 'a*')
        (symbol 'b*'))
      (func
        (symbol 'added')
        None)
      (func
        (symbol 'unknown')
        None))
    (string 'added unknown'))
  a1
  a2
  b1
  b2
  c1
  c3

  $ fileset -p analyzed -p optimized 'removed() & missing() & a*'
  * analyzed:
  (and
    (withstatus
      (and
        (func
          (symbol 'removed')
          None)
        (func
          (symbol 'missing')
          None))
      (string 'removed missing'))
    (symbol 'a*'))
  * optimized:
  (and
    (symbol 'a*')
    (withstatus
      (and
        (func
          (symbol 'removed')
          None)
        (func
          (symbol 'missing')
          None))
      (string 'removed missing')))

  $ fileset -p optimized 'clean() & revs(0, added())'
  * optimized:
  (and
    (withstatus
      (func
        (symbol 'clean')
        None)
      (string 'clean'))
    (func
      (symbol 'revs')
      (list
        (symbol '0')
        (withstatus
          (func
            (symbol 'added')
            None)
          (string 'added')))))
  b1

  $ fileset -p optimized 'clean() & status(null, 0, b* & added())'
  * optimized:
  (and
    (withstatus
      (func
        (symbol 'clean')
        None)
      (string 'clean'))
    (func
      (symbol 'status')
      (list
        (symbol 'null')
        (symbol '0')
        (and
          (symbol 'b*')
          (withstatus
            (func
              (symbol 'added')
              None)
            (string 'added'))))))
  b1

Test files properties

  >>> open('bin', 'wb').write(b'\0a') and None
  $ fileset 'binary()'
  bin
  $ fileset 'binary() and unknown()'
  bin
  $ echo '^bin$' >> .hgignore
  $ fileset 'binary() and ignored()'
  bin
  $ hg add bin
  $ fileset 'binary()'
  bin

  $ fileset -p optimized -s 'binary() and b*'
  * optimized:
  (and
    (symbol 'b*')
    (func
      (symbol 'binary')
      None))
  * matcher:
  <intersectionmatcher
    m1=<patternmatcher patterns='b[^/]*$'>,
    m2=<predicatenmatcher pred=binary>>
  bin

  $ fileset 'grep("b{1}")'
  .hgignore
  b1
  b2
  c1
  $ fileset 'grep("missingparens(")'
  hg: parse error: invalid match pattern: (unbalanced parenthesis|missing \)).* (re)
  [255]

#if execbit
  $ chmod +x b2
  $ fileset 'exec()'
  b2
#endif

#if symlink
  $ ln -s b2 b2link
  $ fileset 'symlink() and unknown()'
  b2link
  $ hg add b2link
#endif

#if no-windows
  $ echo foo > con.xml
  $ fileset 'not portable()'
  con.xml
  $ hg --config ui.portablefilenames=ignore add con.xml
#endif

  >>> open('1k', 'wb').write(b' '*1024) and None
  >>> open('2k', 'wb').write(b' '*2048) and None
  $ hg add 1k 2k
  $ fileset 'size("bar")'
  hg: parse error: couldn't parse size: bar
  [255]
  $ fileset '(1k, 2k)'
  hg: parse error: can't use a list in this context
  (see 'hg help "filesets.x or y"')
  [255]
  $ fileset 'size(1k)'
  1k
  $ fileset '(1k or 2k) and size("< 2k")'
  1k
  $ fileset '(1k or 2k) and size("<=2k")'
  1k
  2k
  $ fileset '(1k or 2k) and size("> 1k")'
  2k
  $ fileset '(1k or 2k) and size(">=1K")'
  1k
  2k
  $ fileset '(1k or 2k) and size(".5KB - 1.5kB")'
  1k
  $ fileset 'size("1M")'
  $ fileset 'size("1 GB")'

Test merge states

  $ hg ci -m manychanges
  $ hg file -r . 'set:copied() & modified()'
  [1]
  $ hg up -C 0
  * files updated, 0 files merged, * files removed, 0 files unresolved (glob)
  $ echo c >> b2
  $ hg ci -m diverging b2
  created new head
  $ fileset 'resolved()'
  $ fileset 'unresolved()'
  $ hg merge
  merging b2
  warning: conflicts while merging b2! (edit, then use 'hg resolve --mark')
  * files updated, 0 files merged, 1 files removed, 1 files unresolved (glob)
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ fileset 'resolved()'
  $ fileset 'unresolved()'
  b2
  $ echo e > b2
  $ hg resolve -m b2
  (no more unresolved files)
  $ fileset 'resolved()'
  b2
  $ fileset 'unresolved()'
  $ hg ci -m merge

Test subrepo predicate

  $ hg init sub
  $ echo a > sub/suba
  $ hg -R sub add sub/suba
  $ hg -R sub ci -m sub
  $ echo 'sub = sub' > .hgsub
  $ hg init sub2
  $ echo b > sub2/b
  $ hg -R sub2 ci -Am sub2
  adding b
  $ echo 'sub2 = sub2' >> .hgsub
  $ fileset 'subrepo()'
  $ hg add .hgsub
  $ fileset 'subrepo()'
  sub
  sub2
  $ fileset 'subrepo("sub")'
  sub
  $ fileset 'subrepo("glob:*")'
  sub
  sub2
  $ hg ci -m subrepo

Test that .hgsubstate is updated as appropriate during a conversion.  The
saverev property is enough to alter the hashes of the subrepo.

  $ hg init ../converted
  $ hg --config extensions.convert= convert --config convert.hg.saverev=True  \
  >      sub ../converted/sub
  initializing destination ../converted/sub repository
  scanning source...
  sorting...
  converting...
  0 sub
  $ hg clone -U sub2 ../converted/sub2
  $ hg --config extensions.convert= convert --config convert.hg.saverev=True  \
  >      . ../converted
  scanning source...
  sorting...
  converting...
  4 addfiles
  3 manychanges
  2 diverging
  1 merge
  0 subrepo
  no ".hgsubstate" updates will be made for "sub2"
  $ hg up -q -R ../converted -r tip
  $ hg --cwd ../converted cat sub/suba sub2/b -r tip
  a
  b
  $ oldnode=`hg log -r tip -T "{node}\n"`
  $ newnode=`hg log -R ../converted -r tip -T "{node}\n"`
  $ [ "$oldnode" != "$newnode" ] || echo "nothing changed"

Test with a revision

  $ hg log -G --template '{rev} {desc}\n'
  @  4 subrepo
  |
  o    3 merge
  |\
  | o  2 diverging
  | |
  o |  1 manychanges
  |/
  o  0 addfiles
  
  $ echo unknown > unknown
  $ fileset -r1 'modified()'
  b2
  $ fileset -r1 'added() and c1'
  c1
  $ fileset -r1 'removed()'
  a2
  $ fileset -r1 'deleted()'
  $ fileset -r1 'unknown()'
  $ fileset -r1 'ignored()'
  $ fileset -r1 'hgignore()'
  .hgignore
  a2
  b2
  bin
  c2
  sub2
  $ fileset -r1 'binary()'
  bin
  $ fileset -r1 'size(1k)'
  1k
  $ fileset -r3 'resolved()'
  $ fileset -r3 'unresolved()'

#if execbit
  $ fileset -r1 'exec()'
  b2
#endif

#if symlink
  $ fileset -r1 'symlink()'
  b2link
#endif

#if no-windows
  $ fileset -r1 'not portable()'
  con.xml
  $ hg forget 'con.xml'
#endif

  $ fileset -r4 'subrepo("re:su.*")'
  sub
  sub2
  $ fileset -r4 'subrepo(re:su.*)'
  sub
  sub2
  $ fileset -r4 'subrepo("sub")'
  sub
  $ fileset -r4 'b2 or c1'
  b2
  c1

  >>> open('dos', 'wb').write(b"dos\r\n") and None
  >>> open('mixed', 'wb').write(b"dos\r\nunix\n") and None
  >>> open('mac', 'wb').write(b"mac\r") and None
  $ hg add dos mixed mac

(remove a1, to examine safety of 'eol' on removed files)
  $ rm a1

  $ fileset 'eol(dos)'
  dos
  mixed
  $ fileset 'eol(unix)'
  .hgignore
  .hgsub
  .hgsubstate
  b1
  b2
  b2.orig
  c1
  c2
  c3
  con.xml (no-windows !)
  mixed
  unknown
  $ fileset 'eol(mac)'
  mac

Test safety of 'encoding' on removed files

  $ fileset 'encoding("ascii")'
  .hgignore
  .hgsub
  .hgsubstate
  1k
  2k
  b1
  b2
  b2.orig
  b2link (symlink !)
  bin
  c1
  c2
  c3
  con.xml (no-windows !)
  dos
  mac
  mixed
  unknown

Test 'revs(...)'
================

small reminder of the repository state

  $ hg log -G
  @  changeset:   4:* (glob)
  |  tag:         tip
  |  user:        test
  |  date:        Thu Jan 01 00:00:00 1970 +0000
  |  summary:     subrepo
  |
  o    changeset:   3:* (glob)
  |\   parent:      2:55b05bdebf36
  | |  parent:      1:* (glob)
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     merge
  | |
  | o  changeset:   2:55b05bdebf36
  | |  parent:      0:8a9576c51c1f
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     diverging
  | |
  o |  changeset:   1:* (glob)
  |/   user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    summary:     manychanges
  |
  o  changeset:   0:8a9576c51c1f
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     addfiles
  
  $ hg status --change 0
  A a1
  A a2
  A b1
  A b2
  $ hg status --change 1
  M b2
  A 1k
  A 2k
  A b2link (no-windows !)
  A bin
  A c1
  A con.xml (no-windows !)
  R a2
  $ hg status --change 2
  M b2
  $ hg status --change 3
  M b2
  A 1k
  A 2k
  A b2link (no-windows !)
  A bin
  A c1
  A con.xml (no-windows !)
  R a2
  $ hg status --change 4
  A .hgsub
  A .hgsubstate
  $ hg status
  A dos
  A mac
  A mixed
  R con.xml (no-windows !)
  ! a1
  ? b2.orig
  ? c3
  ? unknown

Test files at -r0 should be filtered by files at wdir
-----------------------------------------------------

  $ fileset -r0 'tracked() and revs("wdir()", tracked())'
  a1
  b1
  b2

Test that "revs()" work at all
------------------------------

  $ fileset "revs('2', modified())"
  b2

Test that "revs()" work for file missing in the working copy/current context
----------------------------------------------------------------------------

(a2 not in working copy)

  $ fileset "revs('0', added())"
  a1
  a2
  b1
  b2

(none of the file exist in "0")

  $ fileset -r 0 "revs('4', added())"
  .hgsub
  .hgsubstate

Call with empty revset
--------------------------

  $ fileset "revs('2-2', modified())"

Call with revset matching multiple revs
---------------------------------------

  $ fileset "revs('0+4', added())"
  .hgsub
  .hgsubstate
  a1
  a2
  b1
  b2

overlapping set

  $ fileset "revs('1+2', modified())"
  b2

test 'status(...)'
=================

Simple case
-----------

  $ fileset "status(3, 4, added())"
  .hgsub
  .hgsubstate

use rev to restrict matched file
-----------------------------------------

  $ hg status --removed --rev 0 --rev 1
  R a2
  $ fileset "status(0, 1, removed())"
  a2
  $ fileset "tracked() and status(0, 1, removed())"
  $ fileset -r 4 "status(0, 1, removed())"
  a2
  $ fileset -r 4 "tracked() and status(0, 1, removed())"
  $ fileset "revs('4', tracked() and status(0, 1, removed()))"
  $ fileset "revs('0', tracked() and status(0, 1, removed()))"
  a2

check wdir()
------------

  $ hg status --removed  --rev 4
  R con.xml (no-windows !)
  $ fileset "status(4, 'wdir()', removed())"
  con.xml (no-windows !)

  $ hg status --removed --rev 2
  R a2
  $ fileset "status('2', 'wdir()', removed())"
  a2

test backward status
--------------------

  $ hg status --removed --rev 0 --rev 4
  R a2
  $ hg status --added --rev 4 --rev 0
  A a2
  $ fileset "status(4, 0, added())"
  a2

test cross branch status
------------------------

  $ hg status --added --rev 1 --rev 2
  A a2
  $ fileset "status(1, 2, added())"
  a2

test with multi revs revset
---------------------------
  $ hg status --added --rev 0:1 --rev 3:4
  A .hgsub
  A .hgsubstate
  A 1k
  A 2k
  A b2link (no-windows !)
  A bin
  A c1
  A con.xml (no-windows !)
  $ fileset "status('0:1', '3:4', added())"
  .hgsub
  .hgsubstate
  1k
  2k
  b2link (no-windows !)
  bin
  c1
  con.xml (no-windows !)

tests with empty value
----------------------

Fully empty revset

  $ fileset "status('', '4', added())"
  hg: parse error: first argument to status must be a revision
  [255]
  $ fileset "status('2', '', added())"
  hg: parse error: second argument to status must be a revision
  [255]

Empty revset will error at the revset layer

  $ fileset "status(' ', '4', added())"
  hg: parse error at 1: not a prefix: end
  ( 
    ^ here)
  [255]
  $ fileset "status('2', ' ', added())"
  hg: parse error at 1: not a prefix: end
  ( 
    ^ here)
  [255]