view tests/test-subrepo-recursion.t @ 25757:4d1382fd96ff

context: write dirstate out explicitly at the end of markcommitted

To detect change of a file without redundant comparison of file
content, dirstate recognizes a file as certainly clean, if:

  (1) it is already known as "normal",
  (2) dirstate entry for it has valid (= not "-1") timestamp, and
  (3) mode, size and timestamp of it on the filesystem are as same as
      ones expected in dirstate

This works as expected in many cases, but doesn't in the corner case
that changing a file keeps mode, size and timestamp of it on the
filesystem.

The timetable below shows steps in one of typical such situations:

  ---- ----------------------------------- ----------------
                                           timestamp of "f"
                                           ----------------
                                           dirstate   file-
  time          action                     mem  file  system
  ---- ----------------------------------- ---- ----- -----
   *                                             ***    ***
       - 'hg transplant REV1 REV2 ...'
         - transplanting REV1
           ....
   N
           - change "f", but keep size                   N
             (via 'patch.patch()')
           - 'dirstate.normal("f")'          N   ***
             (via 'repo.commit()')

         - transplanting REV2
           - change "f", but keep size                   N
             (via 'patch.patch()')
           - aborted while patching
  N+1
         - release wlock
           - 'dirstate.write()'              N    N      N

       - 'hg status' shows "r1" as "clean"   N    N      N
  ---- ----------------------------------- ---- ----- -----

The most important point is that 'dirstate.write()' is executed at N+1
or later. This causes writing dirstate timestamp N of "f" out
successfully. If it is executed at N, 'parsers.pack_dirstate()'
replaces timestamp N with "-1" before actual writing dirstate out.

This issue can occur when 'hg transplant' satisfies conditions below:

  - multiple revisions to be transplanted change the same file
  - those revisions don't change mode and size of the file, and
  - the 2nd or later revision of them fails after changing the file

The root cause of this issue is that files are changed without
flushing in-memory dirstate changes via 'repo.commit()' (even though
omitting 'dirstate.normallookup()' on files changed by 'patch.patch()'
for efficiency also causes this issue).

To detect changes of files correctly, this patch writes in-memory
dirstate changes out explicitly after marking files as clean in
'committablectx.markcommitted()', which is invoked via
'repo.commit()'.

After this change, timetable is changed as below:

  ---- ----------------------------------- ----------------
                                           timestamp of "f"
                                           ----------------
                                           dirstate   file-
  time          action                     mem  file  system
  ---- ----------------------------------- ---- ----- -----
   *                                             ***    ***
       - 'hg transplant REV1 REV2 ...'
         - transplanting REV1
           ....
   N
           - change "f", but keep size                   N
             (via 'patch.patch()')
           - 'dirstate.normal("f")'          N    ***
             (via 'repo.commit()')
       ----------------------------------- ---- ----- -----
           - 'dirsttate.write()'            -1    -1
       ----------------------------------- ---- ----- -----
         - transplanting REV2
           - change "f", but keep size                   N
             (via 'patch.patch()')
           - aborted while patching
  N+1
         - release wlock
           - 'dirstate.write()'              -1   -1     N

       - 'hg status' shows "r1" as "clean"   -1   -1     N
  ---- ----------------------------------- ---- ----- -----

To reproduce this issue in tests certainly, this patch emulates some
timing critical actions as below:

  - change "f" at N

    'patch.patch()' with 'fakepatchtime.py' explicitly changes mtime
    of patched files to "2000-01-01 00:00" (= N).

  - 'dirstate.write()' via 'repo.commit()' at N

    'fakedirstatewritetime.py' forces 'pack_dirstate()' to use
    "2000-01-01 00:00" as "now", only if 'pack_dirstate()' is invoked
    via 'committablectx.markcommitted()'.

  - 'dirstate.write()' via releasing wlock at N+1 (or "not at N")

    'pack_dirstate()' via releasing wlock uses actual timestamp at
    runtime as "now", and it should be different from the "2000-01-01
    00:00" of "f".

BTW, this patch doesn't test cases below, even though 'patch.patch()'
is used similarly in these cases:

  1. failure of 'hg import' or 'hg qpush'

  2. success of 'hg import', 'hg qpush' or 'hg transplant'

Case (1) above doesn't cause this kind of issue, because:

  - if patching is aborted by conflicts, changed files are committed

    changed files are marked as CLEAN, even though they are partially
    patched.

  - otherwise, dirstate are fully restored by 'dirstateguard'

    For example in timetable above, timestamp of "f" in .hg/dirstate
    is restored to -1 (or less than N), and subsequent 'hg status' can
    detect changes correctly.

Case (2) always causes 'repo.status()' invocation via 'repo.commit()'
just after changing files inside same wlock scope.

  ---- ----------------------------------- ----------------
                                           timestamp of "f"
                                           ----------------
                                           dirstate   file-
  time          action                     mem  file  system
  ---- ----------------------------------- ---- ----- -----
  N                                              ***   ***
       - make file "f" clean                            N

       - execute 'hg foobar'
         ....
         - 'dirstate.normal("f")'           N    ***
           (e.g. via dirty check
            or previous 'repo.commit()')

         - change "f", but keep size                    N
         - 'repo.status()' (*1)
           (via 'repo.commit()')
  ---- ----------------------------------- ---- ----- -----

At a glance, 'repo.status()' at (*1) seems to cause similar issue (=
"changed files are treated as clean"), but actually doesn't.

'dirstate._lastnormaltime' should be N at (*1) above, because
'dirstate.normal()' via dirty check is finished at N.

Therefore, "f" changed at N (= 'dirstate._lastnormaltime') is forcibly
treated as "unsure" at (*1), and changes are detected as expected (see
'dirstate.status()' for detail).

If 'hg import' is executed with '--no-commit', 'repo.status()' isn't
invoked just after changing files inside same wlock scope.

But preceding 'dirstate.normal()' is invoked inside another wlock
scope via 'cmdutil.bailifchanged()', and in-memory changes should be
flushed at the end of that scope.

Therefore, timestamp N of clean "f" should be replaced by -1, if
'dirstate.write()' is invoked at N. It means that condition of this
issue isn't satisfied.

Create test repository:

  $ hg init repo
  $ cd repo
  $ echo x1 > x.txt

  $ hg init foo
  $ cd foo
  $ echo y1 > y.txt

  $ hg init bar
  $ cd bar
  $ echo z1 > z.txt

  $ cd ..
  $ echo 'bar = bar' > .hgsub

  $ cd ..
  $ echo 'foo = foo' > .hgsub

Add files --- .hgsub files must go first to trigger subrepos:

  $ hg add -S .hgsub
  $ hg add -S foo/.hgsub
  $ hg add -S foo/bar
  adding foo/bar/z.txt (glob)
  $ hg add -S
  adding x.txt
  adding foo/y.txt (glob)

Test recursive status without committing anything:

  $ hg status -S
  A .hgsub
  A foo/.hgsub
  A foo/bar/z.txt
  A foo/y.txt
  A x.txt

Test recursive diff without committing anything:

  $ hg diff --nodates -S foo
  diff -r 000000000000 foo/.hgsub
  --- /dev/null
  +++ b/foo/.hgsub
  @@ -0,0 +1,1 @@
  +bar = bar
  diff -r 000000000000 foo/y.txt
  --- /dev/null
  +++ b/foo/y.txt
  @@ -0,0 +1,1 @@
  +y1
  diff -r 000000000000 foo/bar/z.txt
  --- /dev/null
  +++ b/foo/bar/z.txt
  @@ -0,0 +1,1 @@
  +z1

Commits:

  $ hg commit -m fails
  abort: uncommitted changes in subrepository 'foo'
  (use --subrepos for recursive commit)
  [255]

The --subrepos flag overwrite the config setting:

  $ hg commit -m 0-0-0 --config ui.commitsubrepos=No --subrepos
  committing subrepository foo
  committing subrepository foo/bar (glob)

  $ cd foo
  $ echo y2 >> y.txt
  $ hg commit -m 0-1-0

  $ cd bar
  $ echo z2 >> z.txt
  $ hg commit -m 0-1-1

  $ cd ..
  $ hg commit -m 0-2-1

  $ cd ..
  $ hg commit -m 1-2-1

Change working directory:

  $ echo y3 >> foo/y.txt
  $ echo z3 >> foo/bar/z.txt
  $ hg status -S
  M foo/bar/z.txt
  M foo/y.txt
  $ hg diff --nodates -S
  diff -r d254738c5f5e foo/y.txt
  --- a/foo/y.txt
  +++ b/foo/y.txt
  @@ -1,2 +1,3 @@
   y1
   y2
  +y3
  diff -r 9647f22de499 foo/bar/z.txt
  --- a/foo/bar/z.txt
  +++ b/foo/bar/z.txt
  @@ -1,2 +1,3 @@
   z1
   z2
  +z3

Status call crossing repository boundaries:

  $ hg status -S foo/bar/z.txt
  M foo/bar/z.txt
  $ hg status -S -I 'foo/?.txt'
  M foo/y.txt
  $ hg status -S -I '**/?.txt'
  M foo/bar/z.txt
  M foo/y.txt
  $ hg diff --nodates -S -I '**/?.txt'
  diff -r d254738c5f5e foo/y.txt
  --- a/foo/y.txt
  +++ b/foo/y.txt
  @@ -1,2 +1,3 @@
   y1
   y2
  +y3
  diff -r 9647f22de499 foo/bar/z.txt
  --- a/foo/bar/z.txt
  +++ b/foo/bar/z.txt
  @@ -1,2 +1,3 @@
   z1
   z2
  +z3

Status from within a subdirectory:

  $ mkdir dir
  $ cd dir
  $ echo a1 > a.txt
  $ hg status -S
  M foo/bar/z.txt
  M foo/y.txt
  ? dir/a.txt
  $ hg diff --nodates -S
  diff -r d254738c5f5e foo/y.txt
  --- a/foo/y.txt
  +++ b/foo/y.txt
  @@ -1,2 +1,3 @@
   y1
   y2
  +y3
  diff -r 9647f22de499 foo/bar/z.txt
  --- a/foo/bar/z.txt
  +++ b/foo/bar/z.txt
  @@ -1,2 +1,3 @@
   z1
   z2
  +z3

Status with relative path:

  $ hg status -S ..
  M ../foo/bar/z.txt
  M ../foo/y.txt
  ? a.txt

XXX: filtering lfilesrepo.status() in 3.3-rc causes these files to be listed as
added instead of modified.
  $ hg status -S .. --config extensions.largefiles=
  M ../foo/bar/z.txt
  M ../foo/y.txt
  ? a.txt

  $ hg diff --nodates -S ..
  diff -r d254738c5f5e foo/y.txt
  --- a/foo/y.txt
  +++ b/foo/y.txt
  @@ -1,2 +1,3 @@
   y1
   y2
  +y3
  diff -r 9647f22de499 foo/bar/z.txt
  --- a/foo/bar/z.txt
  +++ b/foo/bar/z.txt
  @@ -1,2 +1,3 @@
   z1
   z2
  +z3
  $ cd ..

Cleanup and final commit:

  $ rm -r dir
  $ hg commit --subrepos -m 2-3-2
  committing subrepository foo
  committing subrepository foo/bar (glob)

Test explicit path commands within subrepos: add/forget
  $ echo z1 > foo/bar/z2.txt
  $ hg status -S
  ? foo/bar/z2.txt
  $ hg add foo/bar/z2.txt
  $ hg status -S
  A foo/bar/z2.txt
  $ hg forget foo/bar/z2.txt
  $ hg status -S
  ? foo/bar/z2.txt
  $ hg forget foo/bar/z2.txt
  not removing foo/bar/z2.txt: file is already untracked (glob)
  [1]
  $ hg status -S
  ? foo/bar/z2.txt
  $ rm foo/bar/z2.txt

Log with the relationships between repo and its subrepo:

  $ hg log --template '{rev}:{node|short} {desc}\n'
  2:1326fa26d0c0 2-3-2
  1:4b3c9ff4f66b 1-2-1
  0:23376cbba0d8 0-0-0

  $ hg -R foo log --template '{rev}:{node|short} {desc}\n'
  3:65903cebad86 2-3-2
  2:d254738c5f5e 0-2-1
  1:8629ce7dcc39 0-1-0
  0:af048e97ade2 0-0-0

  $ hg -R foo/bar log --template '{rev}:{node|short} {desc}\n'
  2:31ecbdafd357 2-3-2
  1:9647f22de499 0-1-1
  0:4904098473f9 0-0-0

Status between revisions:

  $ hg status -S
  $ hg status -S --rev 0:1
  M .hgsubstate
  M foo/.hgsubstate
  M foo/bar/z.txt
  M foo/y.txt
  $ hg diff --nodates -S -I '**/?.txt' --rev 0:1
  diff -r af048e97ade2 -r d254738c5f5e foo/y.txt
  --- a/foo/y.txt
  +++ b/foo/y.txt
  @@ -1,1 +1,2 @@
   y1
  +y2
  diff -r 4904098473f9 -r 9647f22de499 foo/bar/z.txt
  --- a/foo/bar/z.txt
  +++ b/foo/bar/z.txt
  @@ -1,1 +1,2 @@
   z1
  +z2

Enable progress extension for archive tests:

  $ cp $HGRCPATH $HGRCPATH.no-progress
  $ cat >> $HGRCPATH <<EOF
  > [extensions]
  > progress =
  > [progress]
  > disable=False
  > assume-tty = 1
  > delay = 0
  > # set changedelay really large so we don't see nested topics
  > changedelay = 30000
  > format = topic bar number
  > refresh = 0
  > width = 60
  > EOF

Test archiving to a directory tree (the doubled lines in the output
only show up in the test output, not in real usage):

  $ hg archive --subrepos ../archive
  \r (no-eol) (esc)
  archiving [                                           ] 0/3\r (no-eol) (esc)
  archiving [=============>                             ] 1/3\r (no-eol) (esc)
  archiving [===========================>               ] 2/3\r (no-eol) (esc)
  archiving [==========================================>] 3/3\r (no-eol) (esc)
                                                              \r (no-eol) (esc)
  \r (no-eol) (esc)
  archiving (foo) [                                     ] 0/3\r (no-eol) (esc)
  archiving (foo) [===========>                         ] 1/3\r (no-eol) (esc)
  archiving (foo) [=======================>             ] 2/3\r (no-eol) (esc)
  archiving (foo) [====================================>] 3/3\r (no-eol) (esc)
                                                              \r (no-eol) (esc)
  \r (no-eol) (esc)
  archiving (foo/bar) [                                 ] 0/1\r (no-eol) (glob) (esc)
  archiving (foo/bar) [================================>] 1/1\r (no-eol) (glob) (esc)
                                                              \r (no-eol) (esc)
  $ find ../archive | sort
  ../archive
  ../archive/.hg_archival.txt
  ../archive/.hgsub
  ../archive/.hgsubstate
  ../archive/foo
  ../archive/foo/.hgsub
  ../archive/foo/.hgsubstate
  ../archive/foo/bar
  ../archive/foo/bar/z.txt
  ../archive/foo/y.txt
  ../archive/x.txt

Test archiving to zip file (unzip output is unstable):

  $ hg archive --subrepos --prefix '.' ../archive.zip
  \r (no-eol) (esc)
  archiving [                                           ] 0/3\r (no-eol) (esc)
  archiving [=============>                             ] 1/3\r (no-eol) (esc)
  archiving [===========================>               ] 2/3\r (no-eol) (esc)
  archiving [==========================================>] 3/3\r (no-eol) (esc)
                                                              \r (no-eol) (esc)
  \r (no-eol) (esc)
  archiving (foo) [                                     ] 0/3\r (no-eol) (esc)
  archiving (foo) [===========>                         ] 1/3\r (no-eol) (esc)
  archiving (foo) [=======================>             ] 2/3\r (no-eol) (esc)
  archiving (foo) [====================================>] 3/3\r (no-eol) (esc)
                                                              \r (no-eol) (esc)
  \r (no-eol) (esc)
  archiving (foo/bar) [                                 ] 0/1\r (no-eol) (glob) (esc)
  archiving (foo/bar) [================================>] 1/1\r (no-eol) (glob) (esc)
                                                              \r (no-eol) (esc)

(unzip date formating is unstable, we do not care about it and glob it out)

  $ unzip -l ../archive.zip
  Archive:  ../archive.zip
    Length [ ]* Date [ ]* Time [ ]* Name (re)
  [\- ]* (re)
        172  [0-9:\- ]*  .hg_archival.txt (re)
         10  [0-9:\- ]*  .hgsub (re)
         45  [0-9:\- ]*  .hgsubstate (re)
          3  [0-9:\- ]*  x.txt (re)
         10  [0-9:\- ]*  foo/.hgsub (re)
         45  [0-9:\- ]*  foo/.hgsubstate (re)
          9  [0-9:\- ]*  foo/y.txt (re)
          9  [0-9:\- ]*  foo/bar/z.txt (re)
  [\- ]* (re)
        303  [ ]*        8 files (re)

Test archiving a revision that references a subrepo that is not yet
cloned:

#if hardlink
  $ hg clone -U . ../empty
  \r (no-eol) (esc)
  linking [ <=>                                           ] 1\r (no-eol) (esc)
  linking [  <=>                                          ] 2\r (no-eol) (esc)
  linking [   <=>                                         ] 3\r (no-eol) (esc)
  linking [    <=>                                        ] 4\r (no-eol) (esc)
  linking [     <=>                                       ] 5\r (no-eol) (esc)
  linking [      <=>                                      ] 6\r (no-eol) (esc)
  linking [       <=>                                     ] 7\r (no-eol) (esc)
  linking [        <=>                                    ] 8\r (no-eol) (esc)
                                                              \r (no-eol) (esc)
#else
  $ hg clone -U . ../empty
  \r (no-eol) (esc)
  linking [ <=>                                           ] 1 (no-eol)
#endif

  $ cd ../empty
#if hardlink
  $ hg archive --subrepos -r tip --prefix './' ../archive.tar.gz
  \r (no-eol) (esc)
  archiving [                                           ] 0/3\r (no-eol) (esc)
  archiving [=============>                             ] 1/3\r (no-eol) (esc)
  archiving [===========================>               ] 2/3\r (no-eol) (esc)
  archiving [==========================================>] 3/3\r (no-eol) (esc)
                                                              \r (no-eol) (esc)
  \r (no-eol) (esc)
  linking [ <=>                                           ] 1\r (no-eol) (esc)
  linking [  <=>                                          ] 2\r (no-eol) (esc)
  linking [   <=>                                         ] 3\r (no-eol) (esc)
  linking [    <=>                                        ] 4\r (no-eol) (esc)
  linking [     <=>                                       ] 5\r (no-eol) (esc)
  linking [      <=>                                      ] 6\r (no-eol) (esc)
  linking [       <=>                                     ] 7\r (no-eol) (esc)
  linking [        <=>                                    ] 8\r (no-eol) (esc)
                                                              \r (no-eol) (esc)
  \r (no-eol) (esc)
  archiving (foo) [                                     ] 0/3\r (no-eol) (esc)
  archiving (foo) [===========>                         ] 1/3\r (no-eol) (esc)
  archiving (foo) [=======================>             ] 2/3\r (no-eol) (esc)
  archiving (foo) [====================================>] 3/3\r (no-eol) (esc)
                                                              \r (no-eol) (esc)
  \r (no-eol) (esc)
  linking [ <=>                                           ] 1\r (no-eol) (esc)
  linking [  <=>                                          ] 2\r (no-eol) (esc)
  linking [   <=>                                         ] 3\r (no-eol) (esc)
  linking [    <=>                                        ] 4\r (no-eol) (esc)
  linking [     <=>                                       ] 5\r (no-eol) (esc)
  linking [      <=>                                      ] 6\r (no-eol) (esc)
                                                              \r (no-eol) (esc)
  \r (no-eol) (esc)
  archiving (foo/bar) [                                 ] 0/1\r (no-eol) (glob) (esc)
  archiving (foo/bar) [================================>] 1/1\r (no-eol) (glob) (esc)
                                                              \r (no-eol) (esc)
  cloning subrepo foo from $TESTTMP/repo/foo
  cloning subrepo foo/bar from $TESTTMP/repo/foo/bar (glob)
#else
Note there's a slight output glitch on non-hardlink systems: the last
"linking" progress topic never gets closed, leading to slight output corruption on that platform.
  $ hg archive --subrepos -r tip --prefix './' ../archive.tar.gz
  \r (no-eol) (esc)
  archiving [                                           ] 0/3\r (no-eol) (esc)
  archiving [=============>                             ] 1/3\r (no-eol) (esc)
  archiving [===========================>               ] 2/3\r (no-eol) (esc)
  archiving [==========================================>] 3/3\r (no-eol) (esc)
                                                              \r (no-eol) (esc)
  \r (no-eol) (esc)
  linking [ <=>                                           ] 1\r (no-eol) (esc)
  cloning subrepo foo/bar from $TESTTMP/repo/foo/bar (glob)
#endif

Archive + subrepos uses '/' for all component separators

  $ tar -tzf ../archive.tar.gz | sort
  .hg_archival.txt
  .hgsub
  .hgsubstate
  foo/.hgsub
  foo/.hgsubstate
  foo/bar/z.txt
  foo/y.txt
  x.txt

The newly cloned subrepos contain no working copy:

  $ hg -R foo summary
  parent: -1:000000000000  (no revision checked out)
  branch: default
  commit: (clean)
  update: 4 new changesets (update)

Disable progress extension and cleanup:

  $ mv $HGRCPATH.no-progress $HGRCPATH

Test archiving when there is a directory in the way for a subrepo
created by archive:

  $ hg clone -U . ../almost-empty
  $ cd ../almost-empty
  $ mkdir foo
  $ echo f > foo/f
  $ hg archive --subrepos -r tip archive
  cloning subrepo foo from $TESTTMP/empty/foo
  abort: destination '$TESTTMP/almost-empty/foo' is not empty (in subrepo foo) (glob)
  [255]

Clone and test outgoing:

  $ cd ..
  $ hg clone repo repo2
  updating to branch default
  cloning subrepo foo from $TESTTMP/repo/foo
  cloning subrepo foo/bar from $TESTTMP/repo/foo/bar (glob)
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd repo2
  $ hg outgoing -S
  comparing with $TESTTMP/repo (glob)
  searching for changes
  no changes found
  comparing with $TESTTMP/repo/foo
  searching for changes
  no changes found
  comparing with $TESTTMP/repo/foo/bar
  searching for changes
  no changes found
  [1]

Make nested change:

  $ echo y4 >> foo/y.txt
  $ hg diff --nodates -S
  diff -r 65903cebad86 foo/y.txt
  --- a/foo/y.txt
  +++ b/foo/y.txt
  @@ -1,3 +1,4 @@
   y1
   y2
   y3
  +y4
  $ hg commit --subrepos -m 3-4-2
  committing subrepository foo
  $ hg outgoing -S
  comparing with $TESTTMP/repo (glob)
  searching for changes
  changeset:   3:2655b8ecc4ee
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     3-4-2
  
  comparing with $TESTTMP/repo/foo
  searching for changes
  changeset:   4:e96193d6cb36
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     3-4-2
  
  comparing with $TESTTMP/repo/foo/bar
  searching for changes
  no changes found


Switch to original repo and setup default path:

  $ cd ../repo
  $ echo '[paths]' >> .hg/hgrc
  $ echo 'default = ../repo2' >> .hg/hgrc

Test incoming:

  $ hg incoming -S
  comparing with $TESTTMP/repo2 (glob)
  searching for changes
  changeset:   3:2655b8ecc4ee
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     3-4-2
  
  comparing with $TESTTMP/repo2/foo
  searching for changes
  changeset:   4:e96193d6cb36
  tag:         tip
  user:        test
  date:        Thu Jan 01 00:00:00 1970 +0000
  summary:     3-4-2
  
  comparing with $TESTTMP/repo2/foo/bar
  searching for changes
  no changes found

  $ hg incoming -S --bundle incoming.hg
  abort: cannot combine --bundle and --subrepos
  [255]

Test missing subrepo:

  $ rm -r foo
  $ hg status -S
  warning: error "unknown revision '65903cebad86f1a84bd4f1134f62fa7dcb7a1c98'" in subrepository "foo"

Issue2619: IndexError: list index out of range on hg add with subrepos
The subrepo must sorts after the explicit filename.

  $ cd ..
  $ hg init test
  $ cd test
  $ hg init x
  $ echo abc > abc.txt
  $ hg ci -Am "abc"
  adding abc.txt
  $ echo "x = x" >> .hgsub
  $ hg add .hgsub
  $ touch a x/a
  $ hg add a x/a

  $ hg ci -Sm "added x"
  committing subrepository x
  $ echo abc > x/a
  $ hg revert --rev '.^' "set:subrepo('glob:x*')"
  abort: subrepository 'x' does not exist in 25ac2c9b3180!
  [255]

  $ cd ..