merge: add more thorough tests for --force

With generate-working-copy-states.py generalized to support
arbitrarily many changesets, we can use it for generating test cases
for merge: use one changeset each for base, remote and local. With the
various working copy states, this is a total of 104 cases.

The first candidate for additional testing is 'hg merge --force'. Even
though the force option is deprecated, it is convenient for testing
because it can be tested without first needing to revert any
changes. Except for the lack of checking for uncommitted changes, it
differs in only a few cases from unforced merge.

The new tests cover all the cases in the existing test-merge-force.t,
except for the unforced merge case, which is covered in several other
files anyway, so nothing remains of the file after this patch.

tests/test-merge-force.t

@@ -1,45 +1,675
+Set up a base, local, and remote changeset, as well as the working copy state.
+Files names are of the form base_remote_local_working-copy. For example,
+content1_content2_content1_content2-untracked represents a
+file that was modified in the remote changeset, left untouched in the
+local changeset, and then modified in the working copy to match the
+remote content, then finally forgotten.
+
   $ hg init
 
-  $ echo a > a
-  $ hg ci -qAm 'add a'
+Create base changeset
+
+  $ python $TESTDIR/generate-working-copy-states.py state 3 1
+  $ hg addremove -q --similarity 0
+  $ hg commit -qm 'base'
+
+Create remote changeset
+
+  $ python $TESTDIR/generate-working-copy-states.py state 3 2
+  $ hg addremove -q --similarity 0
+  $ hg commit -qm 'remote'
+
+Create local changeset
+
+  $ hg update -q 0
+  $ python $TESTDIR/generate-working-copy-states.py state 3 3
+  $ hg addremove -q --similarity 0
+  $ hg commit -qm 'local'
+
+Set up working directory
+
+  $ python $TESTDIR/generate-working-copy-states.py state 3 wc
+  $ hg addremove -q --similarity 0
+  $ hg forget *_*_*_*-untracked
+  $ rm *_*_*_missing-*
 
-  $ echo b > b
-  $ hg ci -qAm 'add b'
+  $ hg status -A
+  M content1_content1_content1_content4-tracked
+  M content1_content1_content3_content1-tracked
+  M content1_content1_content3_content4-tracked
+  M content1_content2_content1_content2-tracked
+  M content1_content2_content1_content4-tracked
+  M content1_content2_content2_content1-tracked
+  M content1_content2_content2_content4-tracked
+  M content1_content2_content3_content1-tracked
+  M content1_content2_content3_content2-tracked
+  M content1_content2_content3_content4-tracked
+  M content1_missing_content1_content4-tracked
+  M content1_missing_content3_content1-tracked
+  M content1_missing_content3_content4-tracked
+  M missing_content2_content2_content4-tracked
+  M missing_content2_content3_content2-tracked
+  M missing_content2_content3_content4-tracked
+  M missing_missing_content3_content4-tracked
+  A content1_content1_missing_content1-tracked
+  A content1_content1_missing_content4-tracked
+  A content1_content2_missing_content1-tracked
+  A content1_content2_missing_content2-tracked
+  A content1_content2_missing_content4-tracked
+  A content1_missing_missing_content1-tracked
+  A content1_missing_missing_content4-tracked
+  A missing_content2_missing_content2-tracked
+  A missing_content2_missing_content4-tracked
+  A missing_missing_missing_content4-tracked
+  R content1_content1_content1_content1-untracked
+  R content1_content1_content1_content4-untracked
+  R content1_content1_content1_missing-untracked
+  R content1_content1_content3_content1-untracked
+  R content1_content1_content3_content3-untracked
+  R content1_content1_content3_content4-untracked
+  R content1_content1_content3_missing-untracked
+  R content1_content2_content1_content1-untracked
+  R content1_content2_content1_content2-untracked
+  R content1_content2_content1_content4-untracked
+  R content1_content2_content1_missing-untracked
+  R content1_content2_content2_content1-untracked
+  R content1_content2_content2_content2-untracked
+  R content1_content2_content2_content4-untracked
+  R content1_content2_content2_missing-untracked
+  R content1_content2_content3_content1-untracked
+  R content1_content2_content3_content2-untracked
+  R content1_content2_content3_content3-untracked
+  R content1_content2_content3_content4-untracked
+  R content1_content2_content3_missing-untracked
+  R content1_missing_content1_content1-untracked
+  R content1_missing_content1_content4-untracked
+  R content1_missing_content1_missing-untracked
+  R content1_missing_content3_content1-untracked
+  R content1_missing_content3_content3-untracked
+  R content1_missing_content3_content4-untracked
+  R content1_missing_content3_missing-untracked
+  R missing_content2_content2_content2-untracked
+  R missing_content2_content2_content4-untracked
+  R missing_content2_content2_missing-untracked
+  R missing_content2_content3_content2-untracked
+  R missing_content2_content3_content3-untracked
+  R missing_content2_content3_content4-untracked
+  R missing_content2_content3_missing-untracked
+  R missing_missing_content3_content3-untracked
+  R missing_missing_content3_content4-untracked
+  R missing_missing_content3_missing-untracked
+  ! content1_content1_content1_missing-tracked
+  ! content1_content1_content3_missing-tracked
+  ! content1_content1_missing_missing-tracked
+  ! content1_content2_content1_missing-tracked
+  ! content1_content2_content2_missing-tracked
+  ! content1_content2_content3_missing-tracked
+  ! content1_content2_missing_missing-tracked
+  ! content1_missing_content1_missing-tracked
+  ! content1_missing_content3_missing-tracked
+  ! content1_missing_missing_missing-tracked
+  ! missing_content2_content2_missing-tracked
+  ! missing_content2_content3_missing-tracked
+  ! missing_content2_missing_missing-tracked
+  ! missing_missing_content3_missing-tracked
+  ! missing_missing_missing_missing-tracked
+  ? content1_content1_missing_content1-untracked
+  ? content1_content1_missing_content4-untracked
+  ? content1_content2_missing_content1-untracked
+  ? content1_content2_missing_content2-untracked
+  ? content1_content2_missing_content4-untracked
+  ? content1_missing_missing_content1-untracked
+  ? content1_missing_missing_content4-untracked
+  ? missing_content2_missing_content2-untracked
+  ? missing_content2_missing_content4-untracked
+  ? missing_missing_missing_content4-untracked
+  C content1_content1_content1_content1-tracked
+  C content1_content1_content3_content3-tracked
+  C content1_content2_content1_content1-tracked
+  C content1_content2_content2_content2-tracked
+  C content1_content2_content3_content3-tracked
+  C content1_missing_content1_content1-tracked
+  C content1_missing_content3_content3-tracked
+  C missing_content2_content2_content2-tracked
+  C missing_content2_content3_content3-tracked
+  C missing_missing_content3_content3-tracked
+
+Merge with remote
 
-  $ hg up -qC 0
-  $ hg rm a
-  $ hg ci -m 'rm a'
-  created new head
+# Notes:
+# - local and remote changed content1_content2_*_content2-untracked
+#   in the same way, so it could potentially be left alone
 
-  $ hg up -qC 1
-  $ rm a
+  $ hg merge -f --tool internal:merge3 'desc("remote")'
+  local changed content1_missing_content1_content4-tracked which remote deleted
+  use (c)hanged version or (d)elete? c
+  local changed content1_missing_content3_content3-tracked which remote deleted
+  use (c)hanged version or (d)elete? c
+  local changed content1_missing_content3_content4-tracked which remote deleted
+  use (c)hanged version or (d)elete? c
+  local changed content1_missing_missing_content4-tracked which remote deleted
+  use (c)hanged version or (d)elete? c
+  remote changed content1_content2_content1_content1-untracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  remote changed content1_content2_content1_content2-untracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  remote changed content1_content2_content1_content4-untracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  remote changed content1_content2_content1_missing-tracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  remote changed content1_content2_content1_missing-untracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  remote changed content1_content2_content2_content1-untracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  remote changed content1_content2_content2_content2-untracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  remote changed content1_content2_content2_content4-untracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  remote changed content1_content2_content2_missing-tracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  remote changed content1_content2_content2_missing-untracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  remote changed content1_content2_content3_content1-untracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  remote changed content1_content2_content3_content2-untracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  remote changed content1_content2_content3_content3-untracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  remote changed content1_content2_content3_content4-untracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  remote changed content1_content2_content3_missing-tracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  remote changed content1_content2_content3_missing-untracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  remote changed content1_content2_missing_content1-untracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  remote changed content1_content2_missing_content2-untracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  remote changed content1_content2_missing_content4-untracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  remote changed content1_content2_missing_missing-tracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  remote changed content1_content2_missing_missing-untracked which local deleted
+  use (c)hanged version or leave (d)eleted? c
+  merging content1_content2_content1_content4-tracked
+  warning: conflicts during merge.
+  merging content1_content2_content1_content4-tracked incomplete! (edit conflicts, then use 'hg resolve --mark')
+  merging content1_content2_content2_content1-tracked
+  merging content1_content2_content2_content4-tracked
+  warning: conflicts during merge.
+  merging content1_content2_content2_content4-tracked incomplete! (edit conflicts, then use 'hg resolve --mark')
+  merging content1_content2_content3_content1-tracked
+  merging content1_content2_content3_content3-tracked
+  warning: conflicts during merge.
+  merging content1_content2_content3_content3-tracked incomplete! (edit conflicts, then use 'hg resolve --mark')
+  merging content1_content2_content3_content4-tracked
+  warning: conflicts during merge.
+  merging content1_content2_content3_content4-tracked incomplete! (edit conflicts, then use 'hg resolve --mark')
+  merging content1_content2_missing_content1-tracked
+  merging content1_content2_missing_content4-tracked
+  warning: conflicts during merge.
+  merging content1_content2_missing_content4-tracked incomplete! (edit conflicts, then use 'hg resolve --mark')
+  merging missing_content2_content2_content4-tracked
+  warning: conflicts during merge.
+  merging missing_content2_content2_content4-tracked incomplete! (edit conflicts, then use 'hg resolve --mark')
+  merging missing_content2_content3_content3-tracked
+  warning: conflicts during merge.
+  merging missing_content2_content3_content3-tracked incomplete! (edit conflicts, then use 'hg resolve --mark')
+  merging missing_content2_content3_content4-tracked
+  warning: conflicts during merge.
+  merging missing_content2_content3_content4-tracked incomplete! (edit conflicts, then use 'hg resolve --mark')
+  merging missing_content2_missing_content4-tracked
+  warning: conflicts during merge.
+  merging missing_content2_missing_content4-tracked incomplete! (edit conflicts, then use 'hg resolve --mark')
+  merging missing_content2_missing_content4-untracked
+  warning: conflicts during merge.
+  merging missing_content2_missing_content4-untracked incomplete! (edit conflicts, then use 'hg resolve --mark')
+  39 files updated, 3 files merged, 8 files removed, 10 files unresolved
+  use 'hg resolve' to retry unresolved file merges or 'hg update -C .' to abandon
+  [1]
 
-Local deleted a file, remote removed
+Check which files need to be resolved (should correspond to the ouput above).
+This should be the files for which the base (1st filename segment), the remote
+(2nd segment) and the working copy (4th segment) are all different.
+
+Interestingly, one untracked file got merged and added, which corresponds the
+odd 'if force and branchmerge and different' case in manifestmerge().
 
-Should fail, since there are deleted files:
+  $ hg resolve -l
+  U content1_content2_content1_content4-tracked
+  R content1_content2_content2_content1-tracked
+  U content1_content2_content2_content4-tracked
+  R content1_content2_content3_content1-tracked
+  U content1_content2_content3_content3-tracked
+  U content1_content2_content3_content4-tracked
+  R content1_content2_missing_content1-tracked
+  U content1_content2_missing_content4-tracked
+  U missing_content2_content2_content4-tracked
+  U missing_content2_content3_content3-tracked
+  U missing_content2_content3_content4-tracked
+  U missing_content2_missing_content4-tracked
+  U missing_content2_missing_content4-untracked
+
+Check status and file content
+
+Some files get added (e.g. content1_content2_content1_content1-untracked)
+
+It is not intuitive that content1_content2_content1_content4-tracked gets
+merged while content1_content2_content1_content4-untracked gets overwritten.
+Any *_content2_*-untracked triggers the modified/deleted prompt and then gets
+overwritten.
+
+A lot of untracked files become tracked, for example
+content1_content2_content2_content2-untracked.
+
+*_missing_missing_missing-tracked is reported as removed ('R'), which
+doesn't make sense since the file did not exist in the parent, but on the
+other hand, merged-in additions are reported as modifications, which is
+almost as strange.
+
+missing_missing_content3_missing-tracked becomes removed ('R'), even though
+the remote side did not touch the file
 
-  $ hg merge
-  abort: uncommitted changes
-  (use 'hg status' to list changes)
-  [255]
-
-Should succeed with --force:
-
-  $ hg -v merge --force
-  resolving manifests
-  removing a
-  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
-  (branch merge, don't forget to commit)
-
-Should show 'a' as removed:
-
-  $ hg status
-  R a
-
-  $ hg ci -m merge
-
-Should not show 'a':
-
-  $ hg manifest
-  b
-
+  $ for f in `python $TESTDIR/generate-working-copy-states.py filelist 3`
+  > do
+  >   echo
+  >   hg status -A $f
+  >   if test -f $f
+  >   then
+  >     cat $f
+  >   else
+  >     echo '<missing>'
+  >   fi
+  >   if test -f ${f}.orig
+  >   then
+  >     echo ${f}.orig:
+  >     cat ${f}.orig
+  >   fi
+  > done
+  
+  C content1_content1_content1_content1-tracked
+  content1
+  
+  R content1_content1_content1_content1-untracked
+  content1
+  
+  M content1_content1_content1_content4-tracked
+  content4
+  
+  R content1_content1_content1_content4-untracked
+  content4
+  
+  ! content1_content1_content1_missing-tracked
+  <missing>
+  
+  R content1_content1_content1_missing-untracked
+  <missing>
+  
+  M content1_content1_content3_content1-tracked
+  content1
+  
+  R content1_content1_content3_content1-untracked
+  content1
+  
+  C content1_content1_content3_content3-tracked
+  content3
+  
+  R content1_content1_content3_content3-untracked
+  content3
+  
+  M content1_content1_content3_content4-tracked
+  content4
+  
+  R content1_content1_content3_content4-untracked
+  content4
+  
+  ! content1_content1_content3_missing-tracked
+  <missing>
+  
+  R content1_content1_content3_missing-untracked
+  <missing>
+  
+  A content1_content1_missing_content1-tracked
+  content1
+  
+  ? content1_content1_missing_content1-untracked
+  content1
+  
+  A content1_content1_missing_content4-tracked
+  content4
+  
+  ? content1_content1_missing_content4-untracked
+  content4
+  
+  ! content1_content1_missing_missing-tracked
+  <missing>
+  
+  content1_content1_missing_missing-untracked: * (glob)
+  <missing>
+  
+  M content1_content2_content1_content1-tracked
+  content2
+  
+  M content1_content2_content1_content1-untracked
+  content2
+  
+  M content1_content2_content1_content2-tracked
+  content2
+  
+  M content1_content2_content1_content2-untracked
+  content2
+  
+  M content1_content2_content1_content4-tracked
+  <<<<<<< local: 0447570f1af6 - test: local
+  content4
+  ||||||| base
+  content1
+  =======
+  content2
+  >>>>>>> other: 85100b8c675b  - test: remote
+  content1_content2_content1_content4-tracked.orig:
+  content4
+  
+  M content1_content2_content1_content4-untracked
+  content2
+  
+  M content1_content2_content1_missing-tracked
+  content2
+  
+  M content1_content2_content1_missing-untracked
+  content2
+  
+  M content1_content2_content2_content1-tracked
+  content2
+  
+  M content1_content2_content2_content1-untracked
+  content2
+  
+  C content1_content2_content2_content2-tracked
+  content2
+  
+  M content1_content2_content2_content2-untracked
+  content2
+  
+  M content1_content2_content2_content4-tracked
+  <<<<<<< local: 0447570f1af6 - test: local
+  content4
+  ||||||| base
+  content1
+  =======
+  content2
+  >>>>>>> other: 85100b8c675b  - test: remote
+  content1_content2_content2_content4-tracked.orig:
+  content4
+  
+  M content1_content2_content2_content4-untracked
+  content2
+  
+  M content1_content2_content2_missing-tracked
+  content2
+  
+  M content1_content2_content2_missing-untracked
+  content2
+  
+  M content1_content2_content3_content1-tracked
+  content2
+  
+  M content1_content2_content3_content1-untracked
+  content2
+  
+  M content1_content2_content3_content2-tracked
+  content2
+  
+  M content1_content2_content3_content2-untracked
+  content2
+  
+  M content1_content2_content3_content3-tracked
+  <<<<<<< local: 0447570f1af6 - test: local
+  content3
+  ||||||| base
+  content1
+  =======
+  content2
+  >>>>>>> other: 85100b8c675b  - test: remote
+  content1_content2_content3_content3-tracked.orig:
+  content3
+  
+  M content1_content2_content3_content3-untracked
+  content2
+  
+  M content1_content2_content3_content4-tracked
+  <<<<<<< local: 0447570f1af6 - test: local
+  content4
+  ||||||| base
+  content1
+  =======
+  content2
+  >>>>>>> other: 85100b8c675b  - test: remote
+  content1_content2_content3_content4-tracked.orig:
+  content4
+  
+  M content1_content2_content3_content4-untracked
+  content2
+  
+  M content1_content2_content3_missing-tracked
+  content2
+  
+  M content1_content2_content3_missing-untracked
+  content2
+  
+  M content1_content2_missing_content1-tracked
+  content2
+  
+  M content1_content2_missing_content1-untracked
+  content2
+  
+  M content1_content2_missing_content2-tracked
+  content2
+  
+  M content1_content2_missing_content2-untracked
+  content2
+  
+  M content1_content2_missing_content4-tracked
+  <<<<<<< local: 0447570f1af6 - test: local
+  content4
+  ||||||| base
+  content1
+  =======
+  content2
+  >>>>>>> other: 85100b8c675b  - test: remote
+  content1_content2_missing_content4-tracked.orig:
+  content4
+  
+  M content1_content2_missing_content4-untracked
+  content2
+  
+  M content1_content2_missing_missing-tracked
+  content2
+  
+  M content1_content2_missing_missing-untracked
+  content2
+  
+  R content1_missing_content1_content1-tracked
+  <missing>
+  
+  R content1_missing_content1_content1-untracked
+  content1
+  
+  M content1_missing_content1_content4-tracked
+  content4
+  
+  R content1_missing_content1_content4-untracked
+  content4
+  
+  R content1_missing_content1_missing-tracked
+  <missing>
+  
+  R content1_missing_content1_missing-untracked
+  <missing>
+  
+  R content1_missing_content3_content1-tracked
+  <missing>
+  
+  R content1_missing_content3_content1-untracked
+  content1
+  
+  C content1_missing_content3_content3-tracked
+  content3
+  
+  R content1_missing_content3_content3-untracked
+  content3
+  
+  M content1_missing_content3_content4-tracked
+  content4
+  
+  R content1_missing_content3_content4-untracked
+  content4
+  
+  R content1_missing_content3_missing-tracked
+  <missing>
+  
+  R content1_missing_content3_missing-untracked
+  <missing>
+  
+  R content1_missing_missing_content1-tracked
+  <missing>
+  
+  ? content1_missing_missing_content1-untracked
+  content1
+  
+  A content1_missing_missing_content4-tracked
+  content4
+  
+  ? content1_missing_missing_content4-untracked
+  content4
+  
+  R content1_missing_missing_missing-tracked
+  <missing>
+  
+  content1_missing_missing_missing-untracked: * (glob)
+  <missing>
+  
+  C missing_content2_content2_content2-tracked
+  content2
+  
+  M missing_content2_content2_content2-untracked
+  content2
+  
+  M missing_content2_content2_content4-tracked
+  <<<<<<< local: 0447570f1af6 - test: local
+  content4
+  ||||||| base
+  =======
+  content2
+  >>>>>>> other: 85100b8c675b  - test: remote
+  missing_content2_content2_content4-tracked.orig:
+  content4
+  
+  M missing_content2_content2_content4-untracked
+  content2
+  
+  M missing_content2_content2_missing-tracked
+  content2
+  
+  M missing_content2_content2_missing-untracked
+  content2
+  
+  M missing_content2_content3_content2-tracked
+  content2
+  
+  M missing_content2_content3_content2-untracked
+  content2
+  
+  M missing_content2_content3_content3-tracked
+  <<<<<<< local: 0447570f1af6 - test: local
+  content3
+  ||||||| base
+  =======
+  content2
+  >>>>>>> other: 85100b8c675b  - test: remote
+  missing_content2_content3_content3-tracked.orig:
+  content3
+  
+  M missing_content2_content3_content3-untracked
+  content2
+  
+  M missing_content2_content3_content4-tracked
+  <<<<<<< local: 0447570f1af6 - test: local
+  content4
+  ||||||| base
+  =======
+  content2
+  >>>>>>> other: 85100b8c675b  - test: remote
+  missing_content2_content3_content4-tracked.orig:
+  content4
+  
+  M missing_content2_content3_content4-untracked
+  content2
+  
+  M missing_content2_content3_missing-tracked
+  content2
+  
+  M missing_content2_content3_missing-untracked
+  content2
+  
+  M missing_content2_missing_content2-tracked
+  content2
+  
+  M missing_content2_missing_content2-untracked
+  content2
+  
+  M missing_content2_missing_content4-tracked
+  <<<<<<< local: 0447570f1af6 - test: local
+  content4
+  ||||||| base
+  =======
+  content2
+  >>>>>>> other: 85100b8c675b  - test: remote
+  missing_content2_missing_content4-tracked.orig:
+  content4
+  
+  M missing_content2_missing_content4-untracked
+  <<<<<<< local: 0447570f1af6 - test: local
+  content4
+  ||||||| base
+  =======
+  content2
+  >>>>>>> other: 85100b8c675b  - test: remote
+  missing_content2_missing_content4-untracked.orig:
+  content4
+  
+  M missing_content2_missing_missing-tracked
+  content2
+  
+  M missing_content2_missing_missing-untracked
+  content2
+  
+  C missing_missing_content3_content3-tracked
+  content3
+  
+  R missing_missing_content3_content3-untracked
+  content3
+  
+  M missing_missing_content3_content4-tracked
+  content4
+  
+  R missing_missing_content3_content4-untracked
+  content4
+  
+  R missing_missing_content3_missing-tracked
+  <missing>
+  
+  R missing_missing_content3_missing-untracked
+  <missing>
+  
+  A missing_missing_missing_content4-tracked
+  content4
+  
+  ? missing_missing_missing_content4-untracked
+  content4
+  
+  R missing_missing_missing_missing-tracked
+  <missing>
+  
+  missing_missing_missing_missing-untracked: * (glob)
+  <missing>