view tests/test-largefiles.t @ 15792:7cbba3adabc7

largefiles: implement addremove (issue3064)

Implementing addremove correctly in largefiles is tricky, becuase the original
addremove function does not call into any of the add or remove function we've
already overridden in the extension.  So the trick is to implement addremove
without duplicating any code.

This patch implements addremove by pulling out the interesting parts of
override_add() and override_remove() into generic utility functions, and
using those to handle the largefiles in addremove.  Then a matcher is
installed that will ignore all largefiles, and the original addremove
function is called to take care of the regular files in addremove.

A small bit of monkey patching is used to make sure that remove_largefiles()
notifies the user when a file is removed by addremove and also makes sure
the removal of largefiles doesn't interfer with the original addremove's
operation of removing the standin.

  $ "$TESTDIR/hghave" symlink unix-permissions serve || exit 80

  $ USERCACHE=`pwd`/cache; export USERCACHE
  $ mkdir -p ${USERCACHE}
  $ cat >> $HGRCPATH <<EOF
  > [extensions]
  > largefiles=
  > purge=
  > rebase=
  > transplant=
  > [phases]
  > publish=False
  > [largefiles]
  > minsize=2
  > patterns=glob:**.dat
  > usercache=${USERCACHE}
  > EOF

Create the repo with a couple of revisions of both large and normal
files, testing that status correctly shows largefiles and that summary output
is correct.

  $ hg init a
  $ cd a
  $ mkdir sub
  $ echo normal1 > normal1
  $ echo normal2 > sub/normal2
  $ echo large1 > large1
  $ echo large2 > sub/large2
  $ hg add normal1 sub/normal2
  $ hg add --large large1 sub/large2
  $ hg commit -m "add files"
  $ echo normal11 > normal1
  $ echo normal22 > sub/normal2
  $ echo large11 > large1
  $ echo large22 > sub/large2
  $ hg st
  M large1
  M normal1
  M sub/large2
  M sub/normal2
  $ hg sum
  parent: 0:30d30fe6a5be tip
   add files
  branch: default
  commit: 4 modified
  update: (current)
  $ hg commit -m "edit files"
  $ hg sum --large
  parent: 1:ce8896473775 tip
   edit files
  branch: default
  commit: (clean)
  update: (current)
  largefiles: No remote repo

Commit preserved largefile contents.

  $ cat normal1
  normal11
  $ cat large1
  large11
  $ cat sub/normal2
  normal22
  $ cat sub/large2
  large22

Remove both largefiles and normal files.
 
  $ hg remove normal1 large1
  $ hg commit -m "remove files"
  $ ls
  sub
  $ echo "testlargefile" > large1-test
  $ hg add --large large1-test
  $ hg st
  A large1-test
  $ hg rm large1-test
  not removing large1-test: file has been marked for add (use forget to undo)
  $ hg st
  A large1-test
  $ hg forget large1-test
  $ hg st
  ? large1-test
  $ rm large1-test

Copy both largefiles and normal files (testing that status output is correct).

  $ hg cp sub/normal2 normal1
  $ hg cp sub/large2 large1
  $ hg st
  A large1
  A normal1
  $ hg commit -m "copy files"
  $ cat normal1
  normal22
  $ cat large1
  large22

Test moving largefiles and verify that normal files are also unaffected.

  $ hg mv normal1 normal3
  $ hg mv large1 large3
  $ hg mv sub/normal2 sub/normal4
  $ hg mv sub/large2 sub/large4
  $ hg commit -m "move files"
  $ cat normal3
  normal22
  $ cat large3
  large22
  $ cat sub/normal4
  normal22
  $ cat sub/large4
  large22

Test archiving the various revisions.  These hit corner cases known with
archiving.

  $ hg archive -r 0 ../archive0
  $ hg archive -r 1 ../archive1
  $ hg archive -r 2 ../archive2
  $ hg archive -r 3 ../archive3
  $ hg archive -r 4 ../archive4
  $ cd ../archive0
  $ cat normal1 
  normal1
  $ cat large1
  large1
  $ cat sub/normal2
  normal2
  $ cat sub/large2
  large2
  $ cd ../archive1
  $ cat normal1
  normal11
  $ cat large1
  large11
  $ cat sub/normal2
  normal22
  $ cat sub/large2
  large22
  $ cd ../archive2
  $ ls
  sub
  $ cat sub/normal2
  normal22
  $ cat sub/large2
  large22
  $ cd ../archive3
  $ cat normal1
  normal22
  $ cat large1
  large22
  $ cat sub/normal2
  normal22
  $ cat sub/large2
  large22
  $ cd ../archive4
  $ cat normal3
  normal22
  $ cat large3
  large22
  $ cat sub/normal4
  normal22
  $ cat sub/large4
  large22

Commit corner case: specify files to commit.

  $ cd ../a
  $ echo normal3 > normal3
  $ echo large3 > large3
  $ echo normal4 > sub/normal4
  $ echo large4 > sub/large4
  $ hg commit normal3 large3 sub/normal4 sub/large4 -m "edit files again"
  $ cat normal3
  normal3
  $ cat large3
  large3
  $ cat sub/normal4
  normal4
  $ cat sub/large4
  large4

One more commit corner case: commit from a subdirectory.

  $ cd ../a
  $ echo normal33 > normal3
  $ echo large33 > large3
  $ echo normal44 > sub/normal4
  $ echo large44 > sub/large4
  $ cd sub
  $ hg commit -m "edit files yet again"
  $ cat ../normal3
  normal33
  $ cat ../large3
  large33
  $ cat normal4
  normal44
  $ cat large4
  large44

Committing standins is not allowed.

  $ cd ..
  $ echo large3 > large3
  $ hg commit .hglf/large3 -m "try to commit standin"
  abort: file ".hglf/large3" is a largefile standin
  (commit the largefile itself instead)
  [255]

Corner cases for adding largefiles.

  $ echo large5 > large5
  $ hg add --large large5
  $ hg add --large large5
  large5 already a largefile
  $ mkdir sub2
  $ echo large6 > sub2/large6
  $ echo large7 > sub2/large7
  $ hg add --large sub2
  adding sub2/large6 as a largefile (glob)
  adding sub2/large7 as a largefile (glob)
  $ hg st
  M large3
  A large5
  A sub2/large6
  A sub2/large7

Config settings (pattern **.dat, minsize 2 MB) are respected.

  $ echo testdata > test.dat
  $ dd bs=1k count=2k if=/dev/zero of=reallylarge > /dev/null 2> /dev/null
  $ hg add
  adding reallylarge as a largefile
  adding test.dat as a largefile

Test that minsize and --lfsize handle float values;
also tests that --lfsize overrides largefiles.minsize.
(0.250 MB = 256 kB = 262144 B)

  $ dd if=/dev/zero of=ratherlarge bs=1024 count=256 > /dev/null 2> /dev/null
  $ dd if=/dev/zero of=medium bs=1024 count=128 > /dev/null 2> /dev/null
  $ hg --config largefiles.minsize=.25 add
  adding ratherlarge as a largefile
  adding medium
  $ hg forget medium
  $ hg --config largefiles.minsize=.25 add --lfsize=.125
  adding medium as a largefile
  $ dd if=/dev/zero of=notlarge bs=1024 count=127 > /dev/null 2> /dev/null
  $ hg --config largefiles.minsize=.25 add --lfsize=.125
  adding notlarge
  $ hg forget notlarge

Test forget on largefiles.

  $ hg forget large3 large5 test.dat reallylarge ratherlarge medium
  $ hg st
  A sub2/large6
  A sub2/large7
  R large3
  ? large5
  ? medium
  ? notlarge
  ? ratherlarge
  ? reallylarge
  ? test.dat
  $ hg commit -m "add/edit more largefiles"
  $ hg st
  ? large3
  ? large5
  ? medium
  ? notlarge
  ? ratherlarge
  ? reallylarge
  ? test.dat

Purge with largefiles: verify that largefiles are still in the working
dir after a purge.

  $ hg purge --all
  $ cat sub/large4
  large44
  $ cat sub2/large6
  large6
  $ cat sub2/large7
  large7

Test addremove: verify that files that should be added as largfiles are added as
such and that already-existing largfiles are not added as normal files by
accident.

  $ rm normal3
  $ rm sub/large4
  $ echo "testing addremove with patterns" > testaddremove.dat
  $ echo "normaladdremove" > normaladdremove
  $ hg addremove
  removing sub/large4
  adding testaddremove.dat as a largefile
  removing normal3
  adding normaladdremove

Clone a largefiles repo.

  $ hg clone . ../b
  updating to branch default
  5 files updated, 0 files merged, 0 files removed, 0 files unresolved
  getting changed largefiles
  3 largefiles updated, 0 removed
  $ cd ../b
  $ hg log --template '{rev}:{node|short}  {desc|firstline}\n'
  7:daea875e9014  add/edit more largefiles
  6:4355d653f84f  edit files yet again
  5:9d5af5072dbd  edit files again
  4:74c02385b94c  move files
  3:9e8fbc4bce62  copy files
  2:51a0ae4d5864  remove files
  1:ce8896473775  edit files
  0:30d30fe6a5be  add files
  $ cat normal3
  normal33
  $ cat sub/normal4
  normal44
  $ cat sub/large4
  large44
  $ cat sub2/large6
  large6
  $ cat sub2/large7
  large7
  $ cd ..
  $ hg clone a -r 3 c
  adding changesets
  adding manifests
  adding file changes
  added 4 changesets with 10 changes to 4 files
  updating to branch default
  4 files updated, 0 files merged, 0 files removed, 0 files unresolved
  getting changed largefiles
  2 largefiles updated, 0 removed
  $ cd c
  $ hg log --template '{rev}:{node|short}  {desc|firstline}\n'
  3:9e8fbc4bce62  copy files
  2:51a0ae4d5864  remove files
  1:ce8896473775  edit files
  0:30d30fe6a5be  add files
  $ cat normal1
  normal22
  $ cat large1
  large22
  $ cat sub/normal2
  normal22
  $ cat sub/large2
  large22

Old revisions of a clone have correct largefiles content (this also
tests update).

  $ hg update -r 1 
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  getting changed largefiles
  1 largefiles updated, 0 removed
  $ cat large1
  large11
  $ cat sub/large2
  large22

Rebasing between two repositories does not revert largefiles to old
revisions (this was a very bad bug that took a lot of work to fix).

  $ cd ..
  $ hg clone a d
  updating to branch default
  5 files updated, 0 files merged, 0 files removed, 0 files unresolved
  getting changed largefiles
  3 largefiles updated, 0 removed
  $ cd b
  $ echo large4-modified > sub/large4
  $ echo normal3-modified > normal3
  $ hg commit -m "modify normal file and largefile in repo b"
  $ cd ../d
  $ echo large6-modified > sub2/large6
  $ echo normal4-modified > sub/normal4
  $ hg commit -m "modify normal file largefile in repo d"
  $ cd ..
  $ hg clone d e
  updating to branch default
  5 files updated, 0 files merged, 0 files removed, 0 files unresolved
  getting changed largefiles
  3 largefiles updated, 0 removed
  $ cd d
  $ hg pull --rebase ../b
  pulling from ../b
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 2 changes to 2 files (+1 heads)
  getting changed largefiles
  1 largefiles updated, 0 removed
  saved backup bundle to $TESTTMP/d/.hg/strip-backup/f574fb32bb45-backup.hg (glob)
  nothing to rebase
  $ hg log --template '{rev}:{node|short}  {desc|firstline}\n'
  9:598410d3eb9a  modify normal file largefile in repo d
  8:a381d2c8c80e  modify normal file and largefile in repo b
  7:daea875e9014  add/edit more largefiles
  6:4355d653f84f  edit files yet again
  5:9d5af5072dbd  edit files again
  4:74c02385b94c  move files
  3:9e8fbc4bce62  copy files
  2:51a0ae4d5864  remove files
  1:ce8896473775  edit files
  0:30d30fe6a5be  add files
  $ cat normal3
  normal3-modified
  $ cat sub/normal4
  normal4-modified
  $ cat sub/large4
  large4-modified
  $ cat sub2/large6
  large6-modified
  $ cat sub2/large7
  large7
  $ cd ../e
  $ hg pull ../b
  pulling from ../b
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 2 changes to 2 files (+1 heads)
  (run 'hg heads' to see heads, 'hg merge' to merge)
  $ hg rebase
  getting changed largefiles
  1 largefiles updated, 0 removed
  saved backup bundle to $TESTTMP/e/.hg/strip-backup/f574fb32bb45-backup.hg (glob)
  $ hg log --template '{rev}:{node|short}  {desc|firstline}\n'
  9:598410d3eb9a  modify normal file largefile in repo d
  8:a381d2c8c80e  modify normal file and largefile in repo b
  7:daea875e9014  add/edit more largefiles
  6:4355d653f84f  edit files yet again
  5:9d5af5072dbd  edit files again
  4:74c02385b94c  move files
  3:9e8fbc4bce62  copy files
  2:51a0ae4d5864  remove files
  1:ce8896473775  edit files
  0:30d30fe6a5be  add files
  $ cat normal3
  normal3-modified
  $ cat sub/normal4
  normal4-modified
  $ cat sub/large4
  large4-modified
  $ cat sub2/large6
  large6-modified
  $ cat sub2/large7
  large7

Rollback on largefiles.

  $ echo large4-modified-again > sub/large4 
  $ hg commit -m "Modify large4 again"
  $ hg rollback
  repository tip rolled back to revision 9 (undo commit)
  working directory now based on revision 9
  $ hg st
  M sub/large4
  $ hg log --template '{rev}:{node|short}  {desc|firstline}\n'
  9:598410d3eb9a  modify normal file largefile in repo d
  8:a381d2c8c80e  modify normal file and largefile in repo b
  7:daea875e9014  add/edit more largefiles
  6:4355d653f84f  edit files yet again
  5:9d5af5072dbd  edit files again
  4:74c02385b94c  move files
  3:9e8fbc4bce62  copy files
  2:51a0ae4d5864  remove files
  1:ce8896473775  edit files
  0:30d30fe6a5be  add files
  $ cat sub/large4
  large4-modified-again

"update --check" refuses to update with uncommitted changes.
  $ hg update --check 8
  abort: uncommitted local changes
  [255]

"update --clean" leaves correct largefiles in working copy.

  $ hg update --clean 
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  getting changed largefiles
  1 largefiles updated, 0 removed
  $ cat normal3
  normal3-modified
  $ cat sub/normal4
  normal4-modified
  $ cat sub/large4
  large4-modified
  $ cat sub2/large6
  large6-modified
  $ cat sub2/large7
  large7

Now "update check" is happy.
  $ hg update --check 8
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  getting changed largefiles
  1 largefiles updated, 0 removed
  $ hg update --check
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  getting changed largefiles
  1 largefiles updated, 0 removed

"revert" works on largefiles (and normal files too).
  $ echo hack3 >> normal3
  $ echo hack4 >> sub/normal4
  $ echo hack4 >> sub/large4
  $ hg rm sub2/large6
  $ echo new >> sub2/large8
  $ hg add --large sub2/large8
# XXX we don't really want to report that we're reverting the standin;
# that's just an implementation detail. But I don't see an obvious fix. ;-(
  $ hg revert sub
  reverting .hglf/sub/large4 (glob)
  reverting sub/normal4 (glob)
  $ hg status
  M normal3
  A sub2/large8
  R sub2/large6
  ? sub/large4.orig
  ? sub/normal4.orig
  $ cat sub/normal4
  normal4-modified
  $ cat sub/large4
  large4-modified
  $ hg revert -a --no-backup
  undeleting .hglf/sub2/large6 (glob)
  forgetting .hglf/sub2/large8 (glob)
  reverting normal3
  $ hg status
  ? sub/large4.orig
  ? sub/normal4.orig
  ? sub2/large8
  $ cat normal3
  normal3-modified
  $ cat sub2/large6
  large6-modified
  $ rm sub/*.orig sub2/large8

revert some files to an older revision
  $ hg revert --no-backup -r 8 sub2
  reverting .hglf/sub2/large6 (glob)
  $ cat sub2/large6
  large6
  $ hg revert --no-backup sub2
  reverting .hglf/sub2/large6 (glob)
  $ hg status

"verify --large" actually verifies largefiles

  $ hg verify --large
  checking changesets
  checking manifests
  crosschecking files in changesets and manifests
  checking files
  10 files, 10 changesets, 28 total revisions
  searching 1 changesets for largefiles
  verified existence of 3 revisions of 3 largefiles

Merging does not revert to old versions of largefiles (this has also
been very problematic).

  $ cd ..
  $ hg clone -r 7 e f
  adding changesets
  adding manifests
  adding file changes
  added 8 changesets with 24 changes to 10 files
  updating to branch default
  5 files updated, 0 files merged, 0 files removed, 0 files unresolved
  getting changed largefiles
  3 largefiles updated, 0 removed
  $ cd f
  $ echo "large4-merge-test" > sub/large4
  $ hg commit -m "Modify large4 to test merge"
  $ hg pull ../e
  pulling from ../e
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 4 changes to 4 files (+1 heads)
  (run 'hg heads' to see heads, 'hg merge' to merge)
  $ hg merge
  merging sub/large4
  largefile sub/large4 has a merge conflict
  keep (l)ocal or take (o)ther? l
  3 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  getting changed largefiles
  1 largefiles updated, 0 removed
  $ hg commit -m "Merge repos e and f"
  $ cat normal3
  normal3-modified
  $ cat sub/normal4
  normal4-modified
  $ cat sub/large4
  large4-merge-test
  $ cat sub2/large6
  large6-modified
  $ cat sub2/large7
  large7

Test status after merging with a branch that introduces a new largefile:

  $ echo large > large
  $ hg add --large large
  $ hg commit -m 'add largefile'
  $ hg update -q ".^"
  $ echo change >> normal3
  $ hg commit -m 'some change'
  created new head
  $ hg merge
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  getting changed largefiles
  1 largefiles updated, 0 removed
  $ hg status
  M large

Test that a normal file and a largefile with the same name and path cannot
coexist.

  $ rm sub2/large7
  $ echo "largeasnormal" > sub2/large7
  $ hg add sub2/large7
  sub2/large7 already a largefile

Test that transplanting a largefile change works correctly.

  $ cd ..
  $ hg clone -r 8 d g
  adding changesets
  adding manifests
  adding file changes
  added 9 changesets with 26 changes to 10 files
  updating to branch default
  5 files updated, 0 files merged, 0 files removed, 0 files unresolved
  getting changed largefiles
  3 largefiles updated, 0 removed
  $ cd g
  $ hg transplant -s ../d 598410d3eb9a 
  searching for changes
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 2 changes to 2 files
  getting changed largefiles
  1 largefiles updated, 0 removed
  $ hg log --template '{rev}:{node|short}  {desc|firstline}\n'
  9:598410d3eb9a  modify normal file largefile in repo d
  8:a381d2c8c80e  modify normal file and largefile in repo b
  7:daea875e9014  add/edit more largefiles
  6:4355d653f84f  edit files yet again
  5:9d5af5072dbd  edit files again
  4:74c02385b94c  move files
  3:9e8fbc4bce62  copy files
  2:51a0ae4d5864  remove files
  1:ce8896473775  edit files
  0:30d30fe6a5be  add files
  $ cat normal3
  normal3-modified
  $ cat sub/normal4
  normal4-modified
  $ cat sub/large4
  large4-modified
  $ cat sub2/large6
  large6-modified
  $ cat sub2/large7
  large7

Test that renaming a largefile results in correct output for status

  $ hg rename sub/large4 large4-renamed
  $ hg st
  A large4-renamed
  R sub/large4
  $ hg commit -m "test rename output"
  $ cat large4-renamed
  large4-modified
  $ cd sub2
  $ hg rename large6 large6-renamed
  $ hg st
  A sub2/large6-renamed
  R sub2/large6
  $ cd ../..

vanilla clients not locked out from largefiles servers on vanilla repos
  $ mkdir r1
  $ cd r1
  $ hg init
  $ echo c1 > f1
  $ hg add f1
  $ hg com -m "m1"
  $ cd ..
  $ hg serve -R r1 -d -p $HGPORT --pid-file hg.pid
  $ cat hg.pid >> $DAEMON_PIDS
  $ hg --config extensions.largefiles=! clone http://localhost:$HGPORT r2
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

largefiles clients still work with vanilla servers
  $ hg --config extensions.largefiles=! serve -R r1 -d -p $HGPORT1 --pid-file hg.pid
  $ cat hg.pid >> $DAEMON_PIDS
  $ hg clone http://localhost:$HGPORT1 r3
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

vanilla clients locked out from largefiles http repos
  $ mkdir r4
  $ cd r4
  $ hg init
  $ echo c1 > f1
  $ hg add --large f1
  $ hg com -m "m1"
  $ cd ..
  $ hg serve -R r4 -d -p $HGPORT2 --pid-file hg.pid
  $ cat hg.pid >> $DAEMON_PIDS
  $ hg --config extensions.largefiles=! clone http://localhost:$HGPORT2 r5
  abort: remote error:
  
  This repository uses the largefiles extension.
  
  Please enable it in your Mercurial config file.
  [255]

used all HGPORTs, kill all daemons
  $ "$TESTDIR/killdaemons.py"

vanilla clients locked out from largefiles ssh repos
  $ hg --config extensions.largefiles=! clone -e "python $TESTDIR/dummyssh" ssh://user@dummy/r4 r5
  abort: remote error:
  
  This repository uses the largefiles extension.
  
  Please enable it in your Mercurial config file.
  [255]

largefiles clients refuse to push largefiles repos to vanilla servers
  $ mkdir r6
  $ cd r6
  $ hg init
  $ echo c1 > f1
  $ hg add f1
  $ hg com -m "m1"
  $ cat >> .hg/hgrc <<!
  > [web]
  > push_ssl = false
  > allow_push = *
  > !
  $ cd ..
  $ hg clone r6 r7
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd r7
  $ echo c2 > f2
  $ hg add --large f2
  $ hg com -m "m2"
  $ hg --config extensions.largefiles=! -R ../r6 serve -d -p $HGPORT --pid-file ../hg.pid
  $ cat ../hg.pid >> $DAEMON_PIDS
  $ hg push http://localhost:$HGPORT
  pushing to http://localhost:$HGPORT/
  searching for changes
  abort: http://localhost:$HGPORT/ does not appear to be a largefile store
  [255]
  $ cd ..

putlfile errors are shown (issue3123)
Corrupt the cached largefile in r7
  $ echo corruption > $USERCACHE/4cdac4d8b084d0b599525cf732437fb337d422a8
  $ hg init empty
  $ hg serve -R empty -d -p $HGPORT1 --pid-file hg.pid \
  >   --config 'web.allow_push=*' --config web.push_ssl=False
  $ cat hg.pid >> $DAEMON_PIDS
  $ hg push -R r7 http://localhost:$HGPORT1
  pushing to http://localhost:$HGPORT1/
  searching for changes
  remote: largefiles: failed to put 4cdac4d8b084d0b599525cf732437fb337d422a8 into store: largefile contents do not match hash
  abort: remotestore: could not put $TESTTMP/r7/.hg/largefiles/4cdac4d8b084d0b599525cf732437fb337d422a8 to remote store http://localhost:$HGPORT1/
  [255]
  $ rm -rf empty

Clone a local repository owned by another user
We have to simulate that here by setting $HOME and removing write permissions
  $ ORIGHOME="$HOME"
  $ mkdir alice
  $ HOME="`pwd`/alice"
  $ cd alice
  $ hg init pubrepo
  $ cd pubrepo
  $ dd if=/dev/urandom bs=1k count=11k > a-large-file 2> /dev/null
  $ hg add --large a-large-file
  $ hg commit -m "Add a large file"
  $ cd ..
  $ chmod -R a-w pubrepo
  $ cd ..
  $ mkdir bob
  $ HOME="`pwd`/bob"
  $ cd bob
  $ hg clone --pull ../alice/pubrepo pubrepo
  requesting all changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  getting changed largefiles
  1 largefiles updated, 0 removed
  $ cd ..
  $ chmod -R u+w alice/pubrepo
  $ HOME="$ORIGHOME"

Symlink to a large largefile should behave the same as a symlink to a normal file
  $ hg init largesymlink
  $ cd largesymlink
  $ dd if=/dev/zero bs=1k count=10k of=largefile 2>/dev/null
  $ hg add --large largefile
  $ hg commit -m "commit a large file"
  $ ln -s largefile largelink
  $ hg add largelink
  $ hg commit -m "commit a large symlink"
  $ rm -f largelink
  $ hg up >/dev/null
  $ test -f largelink
  [1]
  $ test -L largelink
  [1]
  $ rm -f largelink # make next part of the test independent of the previous
  $ hg up -C >/dev/null
  $ test -f largelink
  $ test -L largelink
  $ cd ..