view tests/test-pathconflicts-merge.t @ 50391:12f13b13f414 stable

revlog: avoid possible collision between directory and temporary index

Since 6.4, we create a temporary index file to write the split data without
overwriting the inline version too early. However, the store encoding does not
prevent these new `.i.s` file to collide with a directory with the same name.
While the odds for such a collision to happens are fairly low, the collision
would prevent Mercurial from working.

The store encoding have a mitigation solution in place to prevent such
collisions from happening for `.i` and `.d` files, but not for other extensions.
We cannot update this encoding scheme to solve the issue since it would diverge
from older version of Mercurial.

Instead, we create an alternative directory tree dedicated to such files.
The use of the `.i` extension combined with store encoding will prevent
collisions there.

Path conflict checking is currently disabled by default because of issue5716.
Turn it on for this test.

  $ cat >> $HGRCPATH << EOF
  > [experimental]
  > merge.checkpathconflicts=True
  > EOF

  $ hg init repo
  $ cd repo
  $ echo base > base
  $ hg add base
  $ hg commit -m "base"
  $ hg bookmark -i base
  $ mkdir a
  $ echo 1 > a/b
  $ hg add a/b
  $ hg commit -m "file"
  $ hg bookmark -i file
  $ echo 2 > a/b
  $ hg commit -m "file2"
  $ hg bookmark -i file2
  $ hg up 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

#if symlink
  $ mkdir a
  $ ln -s c a/b
  $ hg add a/b
  $ hg commit -m "link"
  created new head
#else
  $ hg import -q --bypass - <<EOF
  > # HG changeset patch
  > link
  > 
  > diff --git a/a/b b/a/b
  > new file mode 120000
  > --- /dev/null
  > +++ b/a/b
  > @@ -0,0 +1,1 @@
  > +c
  > \ No newline at end of file
  > EOF
  $ hg up -q
#endif

  $ hg bookmark -i link
  $ hg up 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ mkdir -p a/b/c
  $ echo 2 > a/b/c/d
  $ hg add a/b/c/d
  $ hg commit -m "dir"
  created new head
  $ hg bookmark -i dir

Merge - local file conflicts with remote directory

  $ hg up file
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  (activating bookmark file)
  $ hg bookmark -i
  $ hg merge --verbose dir
  resolving manifests
  a/b: path conflict - a file or link has the same name as a directory
  the local file has been renamed to a/b~0ed027b96f31
  resolve manually then use 'hg resolve --mark a/b'
  moving a/b to a/b~0ed027b96f31
  getting a/b/c/d
  1 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ hg status
  M a/b/c/d
  A a/b~0ed027b96f31
  R a/b
  $ hg debugmergestate
  local (working copy): 0ed027b96f31a2560c8abe689ba59876409a2b8e
  other (merge rev): 9049d9534d5c5d16264aab02b4b9e20d03faabef
  file: a/b (state "pu")
    rename side: l
    renamed path: a/b~0ed027b96f31
  $ hg resolve --all
  a/b: path conflict must be resolved manually
  $ hg forget a/b~0ed027b96f31 && rm a/b~0ed027b96f31
  $ hg resolve --mark a/b
  (no more unresolved files)
  $ hg commit -m "merge file and dir (deleted file)"

Merge - local symlink conflicts with remote directory

  $ hg up link
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  (activating bookmark link)
  $ hg bookmark -i
  $ hg merge dir
  a/b: path conflict - a file or link has the same name as a directory
  the local file has been renamed to a/b~2ea68033e3be
  resolve manually then use 'hg resolve --mark a/b'
  1 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ hg status
  M a/b/c/d
  A a/b~2ea68033e3be
  R a/b
  $ hg resolve --list
  P a/b
  $ hg resolve --all
  a/b: path conflict must be resolved manually
  $ hg mv a/b~2ea68033e3be a/b.old
  $ hg resolve --mark a/b
  (no more unresolved files)
  $ hg debugmergestate
  local (working copy): 2ea68033e3be03a560471c1fc9e5704fbedb9b4b
  other (merge rev): 9049d9534d5c5d16264aab02b4b9e20d03faabef
  file: a/b (state "pr")
    rename side: l
    renamed path: a/b~2ea68033e3be
  $ hg resolve --list
  R a/b
  $ hg commit -m "merge link and dir (renamed link)"

Merge - local directory conflicts with remote file or link

  $ hg up dir
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  (activating bookmark dir)
  $ hg bookmark -i
  $ hg merge file
  a/b: path conflict - a file or link has the same name as a directory
  the remote file has been renamed to a/b~0ed027b96f31
  resolve manually then use 'hg resolve --mark a/b'
  1 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ hg status
  A a/b~0ed027b96f31
  $ hg resolve --all
  a/b: path conflict must be resolved manually
  $ hg mv a/b~0ed027b96f31 a/b/old-b
  $ hg resolve --mark a/b
  (no more unresolved files)
  $ hg commit -m "merge dir and file (move file into dir)"
  created new head
  $ hg merge file2
  merging a/b/old-b and a/b to a/b/old-b
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ cat a/b/old-b
  2
  $ hg commit -m "merge file2 (copytrace tracked rename)"
  $ hg merge link
  a/b: path conflict - a file or link has the same name as a directory
  the remote file has been renamed to a/b~2ea68033e3be
  resolve manually then use 'hg resolve --mark a/b'
  1 files updated, 0 files merged, 0 files removed, 1 files unresolved
  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
  [1]
  $ hg mv a/b~2ea68033e3be a/b.old

#if symlink
  $ readlink.py a/b.old
  a/b.old -> c
#else
  $ cat a/b.old
  c (no-eol)
#endif

  $ hg resolve --mark a/b
  (no more unresolved files)
  $ hg commit -m "merge link (rename link)"