$ cat <<EOF > merge

  > import sys, os

  > 

  > try:

  >     import msvcrt

  >     msvcrt.setmode(sys.stdout.fileno(), os.O_BINARY)

  >     msvcrt.setmode(sys.stderr.fileno(), os.O_BINARY)

  > except ImportError:

  >     pass

  > 

  > print("merging for", os.path.basename(sys.argv[1]))

  > EOF

  $ HGMERGE="\"$PYTHON\" ../merge"; export HGMERGE

  $ hg init t

  $ cd t

  $ echo This is file a1 > a

  $ hg add a

  $ hg commit -m "commit #0"

  $ echo This is file b1 > b

  $ hg add b

  $ hg commit -m "commit #1"

  $ hg update 0

  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

Test interrupted updates by having a non-empty dir with the same name as one

of the files in a commit we're updating to

  $ mkdir b && touch b/nonempty

  $ hg up

  abort: Unlinking directory not permitted: *$TESTTMP/t/b* (glob) (windows !)

  abort: Directory not empty: '?\$TESTTMP/t/b'? (re) (no-windows !)

  [255]

  $ hg ci

  abort: last update was interrupted

  (use 'hg update' to get a consistent checkout)

  [20]

  $ hg sum

  parent: 0:538afb845929 

   commit #0

  branch: default

  commit: 1 unknown (interrupted update)

  update: 1 new changesets (update)

  phases: 2 draft

Detect interrupted update by hg status --verbose

  $ hg status -v

  ? b/nonempty

  # The repository is in an unfinished *update* state.

  # To continue:    hg update .

  $ rm b/nonempty

  $ hg up

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg sum

  parent: 1:b8bb4a988f25 tip

   commit #1

  branch: default

  commit: (clean)

  update: (current)

  phases: 2 draft

Prepare a basic merge

  $ hg up 0

  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ echo This is file c1 > c

  $ hg add c

  $ hg commit -m "commit #2"

  created new head

  $ echo This is file b1 > b

no merges expected

  $ hg merge -P 1

  changeset:   1:b8bb4a988f25

  user:        test

  date:        Thu Jan 01 00:00:00 1970 +0000

  summary:     commit #1

  $ hg merge 1

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

  $ hg diff --nodates

  diff -r 49035e18a8e6 b

  --- /dev/null

  +++ b/b

  @@ -0,0 +1,1 @@

  +This is file b1

  $ hg status

  M b

  $ cd ..; rm -r t

  $ hg init t

  $ cd t

  $ echo This is file a1 > a

  $ hg add a

  $ hg commit -m "commit #0"

  $ echo This is file b1 > b

  $ hg add b

  $ hg commit -m "commit #1"

  $ hg update 0

  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ echo This is file c1 > c

  $ hg add c

  $ hg commit -m "commit #2"

  created new head

  $ echo This is file b2 > b

merge should fail

  $ hg merge 1

  b: untracked file differs

  abort: untracked files in working directory differ from files in requested revision

  [20]

#if symlink

symlinks to directories should be treated as regular files (issue5027)

  $ rm b

  $ ln -s 'This is file b2' b

  $ hg merge 1

  b: untracked file differs

  abort: untracked files in working directory differ from files in requested revision

  [20]

symlinks shouldn't be followed

  $ rm b

  $ echo This is file b1 > .hg/b

  $ ln -s .hg/b b

  $ hg merge 1

  b: untracked file differs

  abort: untracked files in working directory differ from files in requested revision

  [20]

  $ rm b

  $ echo This is file b2 > b

#endif

bad config

  $ hg merge 1 --config merge.checkunknown=x

  config error: merge.checkunknown not valid ('x' is none of 'abort', 'ignore', 'warn')

  [30]

this merge should fail

  $ hg merge 1 --config merge.checkunknown=abort

  b: untracked file differs

  abort: untracked files in working directory differ from files in requested revision

  [20]

this merge should warn

  $ hg merge 1 --config merge.checkunknown=warn

  b: replacing untracked file

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

  $ cat b.orig

  This is file b2

  $ hg up --clean 2

  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ mv b.orig b

this merge should silently ignore

  $ cat b

  This is file b2

  $ hg merge 1 --config merge.checkunknown=ignore

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

merge.checkignored

  $ hg up --clean 1

  1 files updated, 0 files merged, 1 files removed, 0 files unresolved

  $ cat >> .hgignore << EOF

  > remoteignored

  > EOF

  $ echo This is file localignored3 > localignored

  $ echo This is file remoteignored3 > remoteignored

  $ hg add .hgignore localignored remoteignored

  $ hg commit -m "commit #3"

  $ hg up 2

  1 files updated, 0 files merged, 4 files removed, 0 files unresolved

  $ cat >> .hgignore << EOF

  > localignored

  > EOF

  $ hg add .hgignore

  $ hg commit -m "commit #4"

remote .hgignore shouldn't be used for determining whether a file is ignored

  $ echo This is file remoteignored4 > remoteignored

  $ hg merge 3 --config merge.checkignored=ignore --config merge.checkunknown=abort

  remoteignored: untracked file differs

  abort: untracked files in working directory differ from files in requested revision

  [20]

  $ hg merge 3 --config merge.checkignored=abort --config merge.checkunknown=ignore

  merging .hgignore

  merging for .hgignore

  3 files updated, 1 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

  $ cat remoteignored

  This is file remoteignored3

  $ cat remoteignored.orig

  This is file remoteignored4

  $ rm remoteignored.orig

local .hgignore should be used for that

  $ hg up --clean 4

  1 files updated, 0 files merged, 3 files removed, 0 files unresolved

  $ echo This is file localignored4 > localignored

also test other conflicting files to see we output the full set of warnings

  $ echo This is file b2 > b

  $ hg merge 3 --config merge.checkignored=abort --config merge.checkunknown=abort

  b: untracked file differs

  localignored: untracked file differs

  abort: untracked files in working directory differ from files in requested revision

  [20]

  $ hg merge 3 --config merge.checkignored=abort --config merge.checkunknown=ignore

  localignored: untracked file differs

  abort: untracked files in working directory differ from files in requested revision

  [20]

  $ hg merge 3 --config merge.checkignored=warn --config merge.checkunknown=abort

  b: untracked file differs

  abort: untracked files in working directory differ from files in requested revision

  [20]

  $ hg merge 3 --config merge.checkignored=warn --config merge.checkunknown=warn

  b: replacing untracked file

  localignored: replacing untracked file

  merging .hgignore

  merging for .hgignore

  3 files updated, 1 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

  $ cat localignored

  This is file localignored3

  $ cat localignored.orig

  This is file localignored4

  $ rm localignored.orig

  $ cat b.orig

  This is file b2

  $ hg up --clean 2

  0 files updated, 0 files merged, 4 files removed, 0 files unresolved

  $ mv b.orig b

this merge of b should work

  $ cat b

  This is file b2

  $ hg merge -f 1

  merging b

  merging for b

  0 files updated, 1 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

  $ hg diff --nodates

  diff -r 49035e18a8e6 b

  --- /dev/null

  +++ b/b

  @@ -0,0 +1,1 @@

  +This is file b2

  $ hg status

  M b

  $ cd ..; rm -r t

  $ hg init t

  $ cd t

  $ echo This is file a1 > a

  $ hg add a

  $ hg commit -m "commit #0"

  $ echo This is file b1 > b

  $ hg add b

  $ hg commit -m "commit #1"

  $ echo This is file b22 > b

  $ hg commit -m "commit #2"

  $ hg update 1

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ echo This is file c1 > c

  $ hg add c

  $ hg commit -m "commit #3"

  created new head

Contents of b should be "this is file b1"

  $ cat b

  This is file b1

  $ echo This is file b22 > b

merge fails

  $ hg merge 2

  abort: uncommitted changes

  (use 'hg status' to list changes)

  [20]

merge expected!

  $ hg merge -f 2

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

  $ hg diff --nodates

  diff -r 85de557015a8 b

  --- a/b

  +++ b/b

  @@ -1,1 +1,1 @@

  -This is file b1

  +This is file b22

  $ hg status

  M b

  $ cd ..; rm -r t

  $ hg init t

  $ cd t

  $ echo This is file a1 > a

  $ hg add a

  $ hg commit -m "commit #0"

  $ echo This is file b1 > b

  $ hg add b

  $ hg commit -m "commit #1"

  $ echo This is file b22 > b

  $ hg commit -m "commit #2"

  $ hg update 1

  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ echo This is file c1 > c

  $ hg add c

  $ hg commit -m "commit #3"

  created new head

  $ echo This is file b33 > b

merge of b should fail

  $ hg merge 2

  abort: uncommitted changes

  (use 'hg status' to list changes)

  [20]

merge of b expected

  $ hg merge -f 2

  merging b

  merging for b

  0 files updated, 1 files merged, 0 files removed, 0 files unresolved

  (branch merge, don't forget to commit)

  $ hg diff --nodates

  diff -r 85de557015a8 b

  --- a/b

  +++ b/b

  @@ -1,1 +1,1 @@

  -This is file b1

  +This is file b33

  $ hg status

  M b

Test for issue2364

  $ hg up -qC .

  $ hg rm b

  $ hg ci -md

  $ hg revert -r -2 b

  $ hg up -q -- -2

Test that updated files are treated as "modified", when

'merge.update()' is aborted before 'merge.recordupdates()' (= parents

aren't changed), even if none of mode, size and timestamp of them

isn't changed on the filesystem (see also issue4583).

This test is now "best effort" as the mechanism to prevent such race are

getting better, it get more complicated to test a specific scenario that would

trigger it. If you see flakyness here, there is a race.

  $ cat > $TESTTMP/abort.py <<EOF

  > # emulate aborting before "recordupdates()". in this case, files

  > # are changed without updating dirstate

  > from mercurial import (

  >   error,

  >   extensions,

  >   merge,

  > )

  > def applyupdates(orig, *args, **kwargs):

  >     orig(*args, **kwargs)

  >     raise error.Abort(b'intentional aborting')

  > def extsetup(ui):

  >     extensions.wrapfunction(merge, "applyupdates", applyupdates)

  > EOF

(file gotten from other revision)

  $ hg update -q -C 2

  $ echo 'THIS IS FILE B5' > b

  $ hg commit -m 'commit #5'

  $ hg update -q -C 3

  $ cat b

  This is file b1

  $ cat >> .hg/hgrc <<EOF

  > [extensions]

  > abort = $TESTTMP/abort.py

  > EOF

  $ hg merge 5

  abort: intentional aborting

  [255]

  $ cat >> .hg/hgrc <<EOF

  > [extensions]

  > abort = !

  > EOF

  $ cat b