tests/test-rebase-inmemory.t

errors: raise ConfigError on failure to parse config file

This replaces two raises of `ParseError` by `ConfigError`, which makes
it so we get the desired exit code when `ui.detailed-exit-code` is
enabled. Because the exceptions include a location, I had to add that
to `ConfigError` as well. I considered making `ConfigError` a subclass
of `ParseError`, but it doesn't feel like it quite passes the "is-a"
test.

I used "config error: " as prefix for these errors instead of the
previous "hg: parse error: ", which seems a little less accurate now
(and, as I've said before, I don't know what the "hg: " part is
supposed to signify anyway). I can easily be convinced to change the
prefix to something else (including "abort: ").

Some of the exceptions raised here mean that we fail to even load the
`ui` object in the `dispatch` module. When that happens, we don't know
to use detailed exit codes, so some tests (e.g. `test-hgrc.t`) still
see exit code 255. I'll try to get back to that later. It should be
possible to give detailed exit codes if at least part of the config
can be read (e.g. when the system-wide one enables detailed exit codes
and the user's config fails to parse).

Differential Revision: https://phab.mercurial-scm.org/D9355

#require symlink execbit
  $ cat << EOF >> $HGRCPATH
  > [phases]
  > publish=False
  > [extensions]
  > amend=
  > rebase=
  > debugdrawdag=$TESTDIR/drawdag.py
  > strip=
  > [rebase]
  > experimental.inmemory=1
  > [diff]
  > git=1
  > [alias]
  > tglog = log -G --template "{rev}: {node|short} '{desc}'\n"
  > EOF

Rebase a simple DAG:
  $ hg init repo1
  $ cd repo1
  $ hg debugdrawdag <<'EOS'
  > c b
  > |/
  > d
  > |
  > a
  > EOS
  $ hg up -C a
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg tglog
  o  3: 814f6bd05178 'c'
  |
  | o  2: db0e82a16a62 'b'
  |/
  o  1: 02952614a83d 'd'
  |
  @  0: b173517d0057 'a'
  
  $ hg cat -r 3 c
  c (no-eol)
  $ hg cat -r 2 b
  b (no-eol)
  $ hg rebase --debug -r b -d c | grep rebasing
  rebasing in memory
  rebasing 2:db0e82a16a62 b "b"
  $ hg tglog
  o  3: ca58782ad1e4 'b'
  |
  o  2: 814f6bd05178 'c'
  |
  o  1: 02952614a83d 'd'
  |
  @  0: b173517d0057 'a'
  
  $ hg cat -r 3 b
  b (no-eol)
  $ hg cat -r 2 c
  c (no-eol)
  $ cd ..

Case 2:
  $ hg init repo2
  $ cd repo2
  $ hg debugdrawdag <<'EOS'
  > c b
  > |/
  > d
  > |
  > a
  > EOS

Add a symlink and executable file:
  $ hg up -C c
  3 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ ln -s somefile e
  $ echo f > f
  $ chmod +x f
  $ hg add e f
  $ hg amend -q
  $ hg up -Cq a

Write files to the working copy, and ensure they're still there after the rebase
  $ echo "abc" > a
  $ ln -s def b
  $ echo "ghi" > c
  $ echo "jkl" > d
  $ echo "mno" > e
  $ hg tglog
  o  3: f56b71190a8f 'c'
  |
  | o  2: db0e82a16a62 'b'
  |/
  o  1: 02952614a83d 'd'
  |
  @  0: b173517d0057 'a'
  
  $ hg cat -r 3 c
  c (no-eol)
  $ hg cat -r 2 b
  b (no-eol)
  $ hg cat -r 3 e
  somefile (no-eol)
  $ hg rebase --debug -s b -d a | grep rebasing
  rebasing in memory
  rebasing 2:db0e82a16a62 b "b"
  $ hg tglog
  o  3: fc055c3b4d33 'b'
  |
  | o  2: f56b71190a8f 'c'
  | |
  | o  1: 02952614a83d 'd'
  |/
  @  0: b173517d0057 'a'
  
  $ hg cat -r 2 c
  c (no-eol)
  $ hg cat -r 3 b
  b (no-eol)
  $ hg rebase --debug -s 1 -d 3 | grep rebasing
  rebasing in memory
  rebasing 1:02952614a83d d "d"
  rebasing 2:f56b71190a8f "c"
  $ hg tglog
  o  3: 753feb6fd12a 'c'
  |
  o  2: 09c044d2cb43 'd'
  |
  o  1: fc055c3b4d33 'b'
  |
  @  0: b173517d0057 'a'
  
Ensure working copy files are still there:
  $ cat a
  abc
  $ readlink.py b
  b -> def
  $ cat e
  mno

Ensure symlink and executable files were rebased properly:
  $ hg up -Cq 3
  $ readlink.py e
  e -> somefile
  $ ls -l f | cut -c -10
  -rwxr-xr-x

Rebase the working copy parent
  $ hg up -C 3
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg rebase -r 3 -d 0 --debug | grep rebasing
  rebasing in memory
  rebasing 3:753feb6fd12a tip "c"
  $ hg tglog
  @  3: 844a7de3e617 'c'
  |
  | o  2: 09c044d2cb43 'd'
  | |
  | o  1: fc055c3b4d33 'b'
  |/
  o  0: b173517d0057 'a'
  

Test reporting of path conflicts

  $ hg rm a
  $ mkdir a
  $ touch a/a
  $ hg ci -Am "a/a"
  adding a/a
  $ hg tglog
  @  4: daf7dfc139cb 'a/a'
  |
  o  3: 844a7de3e617 'c'
  |
  | o  2: 09c044d2cb43 'd'
  | |
  | o  1: fc055c3b4d33 'b'
  |/
  o  0: b173517d0057 'a'
  
  $ hg rebase -r . -d 2
  rebasing 4:daf7dfc139cb tip "a/a"
  saved backup bundle to $TESTTMP/repo2/.hg/strip-backup/daf7dfc139cb-fdbfcf4f-rebase.hg

  $ hg tglog
  @  4: c6ad37a4f250 'a/a'
  |
  | o  3: 844a7de3e617 'c'
  | |
  o |  2: 09c044d2cb43 'd'
  | |
  o |  1: fc055c3b4d33 'b'
  |/
  o  0: b173517d0057 'a'
  
  $ echo foo > foo
  $ hg ci -Aqm "added foo"
  $ hg up '.^'
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo bar > bar
  $ hg ci -Aqm "added bar"
  $ hg rm a/a
  $ echo a > a
  $ hg ci -Aqm "added a back!"
  $ hg tglog
  @  7: 855e9797387e 'added a back!'
  |
  o  6: d14530e5e3e6 'added bar'
  |
  | o  5: 9b94b9373deb 'added foo'
  |/
  o  4: c6ad37a4f250 'a/a'
  |
  | o  3: 844a7de3e617 'c'
  | |
  o |  2: 09c044d2cb43 'd'
  | |
  o |  1: fc055c3b4d33 'b'
  |/
  o  0: b173517d0057 'a'
  
  $ hg rebase -r . -d 5
  rebasing 7:855e9797387e tip "added a back!"
  saved backup bundle to $TESTTMP/repo2/.hg/strip-backup/855e9797387e-81ee4c5d-rebase.hg

  $ hg tglog
  @  7: bb3f02be2688 'added a back!'
  |
  | o  6: d14530e5e3e6 'added bar'
  | |
  o |  5: 9b94b9373deb 'added foo'
  |/
  o  4: c6ad37a4f250 'a/a'
  |
  | o  3: 844a7de3e617 'c'
  | |
  o |  2: 09c044d2cb43 'd'
  | |
  o |  1: fc055c3b4d33 'b'
  |/
  o  0: b173517d0057 'a'
  
  $ mkdir -p c/subdir
  $ echo c > c/subdir/file.txt
  $ hg add c/subdir/file.txt
  $ hg ci -m 'c/subdir/file.txt'
  $ hg rebase -r . -d 3 -n
  starting dry-run rebase; repository will not be changed
  rebasing 8:e147e6e3c490 tip "c/subdir/file.txt"
  abort: error: 'c/subdir/file.txt' conflicts with file 'c' in 3.
  [255]
FIXME: shouldn't need this, but when we hit path conflicts in dryrun mode, we
don't clean up rebasestate.
  $ hg rebase --abort
  rebase aborted
  $ hg rebase -r 3 -d . -n
  starting dry-run rebase; repository will not be changed
  rebasing 3:844a7de3e617 "c"
  abort: error: file 'c' cannot be written because  'c/' is a directory in e147e6e3c490 (containing 1 entries: c/subdir/file.txt)
  [255]

  $ cd ..

Test path auditing (issue5818)

  $ mkdir lib_
  $ ln -s lib_ lib
  $ hg init repo
  $ cd repo
  $ mkdir -p ".$TESTTMP/lib"
  $ touch ".$TESTTMP/lib/a"
  $ hg add ".$TESTTMP/lib/a"
  $ hg ci -m 'a'

  $ touch ".$TESTTMP/lib/b"
  $ hg add ".$TESTTMP/lib/b"
  $ hg ci -m 'b'

  $ hg up -q '.^'
  $ touch ".$TESTTMP/lib/c"
  $ hg add ".$TESTTMP/lib/c"
  $ hg ci -m 'c'
  created new head
  $ hg rebase -s 1 -d .
  rebasing 1:* "b" (glob)
  saved backup bundle to $TESTTMP/repo/.hg/strip-backup/*-rebase.hg (glob)
  $ cd ..

Test dry-run rebasing

  $ hg init repo3
  $ cd repo3
  $ echo a>a
  $ hg ci -Aqma
  $ echo b>b
  $ hg ci -Aqmb
  $ echo c>c
  $ hg ci -Aqmc
  $ echo d>d
  $ hg ci -Aqmd
  $ echo e>e
  $ hg ci -Aqme

  $ hg up 1 -q
  $ echo f>f
  $ hg ci -Amf
  adding f
  created new head
  $ echo g>g
  $ hg ci -Aqmg
  $ hg log -G --template "{rev}:{short(node)} {person(author)}\n{firstline(desc)} {topic}\n\n"
  @  6:baf10c5166d4 test
  |  g
  |
  o  5:6343ca3eff20 test
  |  f
  |
  | o  4:e860deea161a test
  | |  e
  | |
  | o  3:055a42cdd887 test
  | |  d
  | |
  | o  2:177f92b77385 test
  |/   c
  |
  o  1:d2ae7f538514 test
  |  b
  |
  o  0:cb9a9f314b8b test
     a
  
Make sure it throws error while passing --continue or --abort with --dry-run
  $ hg rebase -s 2 -d 6 -n --continue
  abort: cannot specify both --continue and --dry-run
  [10]
  $ hg rebase -s 2 -d 6 -n --abort
  abort: cannot specify both --abort and --dry-run
  [10]

Check dryrun gives correct results when there is no conflict in rebasing
  $ hg rebase -s 2 -d 6 -n
  starting dry-run rebase; repository will not be changed
  rebasing 2:177f92b77385 "c"
  rebasing 3:055a42cdd887 "d"
  rebasing 4:e860deea161a "e"
  dry-run rebase completed successfully; run without -n/--dry-run to perform this rebase

  $ hg diff
  $ hg status

  $ hg log -G --template "{rev}:{short(node)} {person(author)}\n{firstline(desc)} {topic}\n\n"
  @  6:baf10c5166d4 test
  |  g
  |
  o  5:6343ca3eff20 test
  |  f
  |
  | o  4:e860deea161a test
  | |  e
  | |
  | o  3:055a42cdd887 test
  | |  d
  | |
  | o  2:177f92b77385 test
  |/   c
  |
  o  1:d2ae7f538514 test
  |  b
  |
  o  0:cb9a9f314b8b test
     a
  
Check dryrun working with --collapse when there is no conflict
  $ hg rebase -s 2 -d 6 -n --collapse
  starting dry-run rebase; repository will not be changed
  rebasing 2:177f92b77385 "c"
  rebasing 3:055a42cdd887 "d"
  rebasing 4:e860deea161a "e"
  dry-run rebase completed successfully; run without -n/--dry-run to perform this rebase

Check dryrun gives correct results when there is conflict in rebasing
Make a conflict:
  $ hg up 6 -q
  $ echo conflict>e
  $ hg ci -Aqm "conflict with e"
  $ hg log -G --template "{rev}:{short(node)} {person(author)}\n{firstline(desc)} {topic}\n\n"
  @  7:d2c195b28050 test
  |  conflict with e
  |
  o  6:baf10c5166d4 test
  |  g
  |
  o  5:6343ca3eff20 test
  |  f
  |
  | o  4:e860deea161a test
  | |  e
  | |
  | o  3:055a42cdd887 test
  | |  d
  | |
  | o  2:177f92b77385 test
  |/   c
  |
  o  1:d2ae7f538514 test
  |  b
  |
  o  0:cb9a9f314b8b test
     a
  
  $ hg rebase -s 2 -d 7 -n
  starting dry-run rebase; repository will not be changed
  rebasing 2:177f92b77385 "c"
  rebasing 3:055a42cdd887 "d"
  rebasing 4:e860deea161a "e"
  merging e
  hit a merge conflict
  [1]
  $ hg diff
  $ hg status
  $ hg log -G --template "{rev}:{short(node)} {person(author)}\n{firstline(desc)} {topic}\n\n"
  @  7:d2c195b28050 test
  |  conflict with e
  |
  o  6:baf10c5166d4 test
  |  g
  |
  o  5:6343ca3eff20 test
  |  f
  |
  | o  4:e860deea161a test
  | |  e
  | |
  | o  3:055a42cdd887 test
  | |  d
  | |
  | o  2:177f92b77385 test
  |/   c
  |
  o  1:d2ae7f538514 test
  |  b
  |
  o  0:cb9a9f314b8b test
     a
  
Check dryrun working with --collapse when there is conflicts
  $ hg rebase -s 2 -d 7 -n --collapse
  starting dry-run rebase; repository will not be changed
  rebasing 2:177f92b77385 "c"
  rebasing 3:055a42cdd887 "d"
  rebasing 4:e860deea161a "e"
  merging e
  hit a merge conflict
  [1]

In-memory rebase that fails due to merge conflicts

  $ hg rebase -s 2 -d 7
  rebasing 2:177f92b77385 "c"
  rebasing 3:055a42cdd887 "d"
  rebasing 4:e860deea161a "e"
  merging e
  hit merge conflicts; rebasing that commit again in the working copy
  merging e
  warning: conflicts while merging e! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see 'hg resolve', then 'hg rebase --continue')
  [240]
  $ hg rebase --abort
  saved backup bundle to $TESTTMP/repo3/.hg/strip-backup/c1e524d4287c-f91f82e1-backup.hg
  rebase aborted

Retrying without in-memory merge won't lose working copy changes
  $ cd ..
  $ hg clone repo3 repo3-dirty -q
  $ cd repo3-dirty
  $ echo dirty > a
  $ hg rebase -s 2 -d 7
  rebasing 2:177f92b77385 "c"
  rebasing 3:055a42cdd887 "d"
  rebasing 4:e860deea161a "e"
  merging e
  hit merge conflicts; rebasing that commit again in the working copy
  transaction abort!
  rollback completed
  abort: uncommitted changes
  [20]
  $ cat a
  dirty

Retrying without in-memory merge won't lose merge state
  $ cd ..
  $ hg clone repo3 repo3-merge-state -q
  $ cd repo3-merge-state
  $ hg merge 4
  merging e
  warning: conflicts while merging e! (edit, then use 'hg resolve --mark')
  2 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 resolve -l
  U e
  $ hg rebase -s 2 -d 7
  abort: outstanding uncommitted merge
  (use 'hg commit' or 'hg merge --abort')
  [20]
  $ hg resolve -l
  U e

==========================
Test for --confirm option|
==========================
  $ cd ..
  $ hg clone repo3 repo4 -q
  $ cd repo4
  $ hg strip 7 -q
  $ hg log -G --template "{rev}:{short(node)} {person(author)}\n{firstline(desc)} {topic}\n\n"
  @  6:baf10c5166d4 test
  |  g
  |
  o  5:6343ca3eff20 test
  |  f
  |
  | o  4:e860deea161a test
  | |  e
  | |
  | o  3:055a42cdd887 test
  | |  d
  | |
  | o  2:177f92b77385 test
  |/   c
  |
  o  1:d2ae7f538514 test
  |  b
  |
  o  0:cb9a9f314b8b test
     a
  
Check it gives error when both --dryrun and --confirm is used:
  $ hg rebase -s 2 -d . --confirm --dry-run
  abort: cannot specify both --confirm and --dry-run
  [10]
  $ hg rebase -s 2 -d . --confirm --abort
  abort: cannot specify both --abort and --confirm
  [10]
  $ hg rebase -s 2 -d . --confirm --continue
  abort: cannot specify both --continue and --confirm
  [10]

Test --confirm option when there are no conflicts:
  $ hg rebase -s 2 -d . --keep --config ui.interactive=True --confirm << EOF
  > n
  > EOF
  starting in-memory rebase
  rebasing 2:177f92b77385 "c"
  rebasing 3:055a42cdd887 "d"
  rebasing 4:e860deea161a "e"
  rebase completed successfully
  apply changes (yn)? n
  $ hg log -G --template "{rev}:{short(node)} {person(author)}\n{firstline(desc)} {topic}\n\n"
  @  6:baf10c5166d4 test
  |  g
  |
  o  5:6343ca3eff20 test
  |  f
  |
  | o  4:e860deea161a test
  | |  e
  | |
  | o  3:055a42cdd887 test
  | |  d
  | |
  | o  2:177f92b77385 test
  |/   c
  |
  o  1:d2ae7f538514 test
  |  b
  |
  o  0:cb9a9f314b8b test
     a
  
  $ hg rebase -s 2 -d . --keep --config ui.interactive=True --confirm << EOF
  > y
  > EOF
  starting in-memory rebase
  rebasing 2:177f92b77385 "c"
  rebasing 3:055a42cdd887 "d"
  rebasing 4:e860deea161a "e"
  rebase completed successfully
  apply changes (yn)? y
  $ hg log -G --template "{rev}:{short(node)} {person(author)}\n{firstline(desc)} {topic}\n\n"
  o  9:9fd28f55f6dc test
  |  e
  |
  o  8:12cbf031f469 test
  |  d
  |
  o  7:c83b1da5b1ae test
  |  c
  |
  @  6:baf10c5166d4 test
  |  g
  |
  o  5:6343ca3eff20 test
  |  f
  |
  | o  4:e860deea161a test
  | |  e
  | |
  | o  3:055a42cdd887 test
  | |  d
  | |
  | o  2:177f92b77385 test
  |/   c
  |
  o  1:d2ae7f538514 test
  |  b
  |
  o  0:cb9a9f314b8b test
     a
  
Test --confirm option when there is a conflict
  $ hg up tip -q
  $ echo ee>e
  $ hg ci --amend -m "conflict with e" -q
  $ hg log -G --template "{rev}:{short(node)} {person(author)}\n{firstline(desc)} {topic}\n\n"
  @  9:906d72f66a59 test
  |  conflict with e
  |
  o  8:12cbf031f469 test
  |  d
  |
  o  7:c83b1da5b1ae test
  |  c
  |
  o  6:baf10c5166d4 test
  |  g
  |
  o  5:6343ca3eff20 test
  |  f
  |
  | o  4:e860deea161a test
  | |  e
  | |
  | o  3:055a42cdd887 test
  | |  d
  | |
  | o  2:177f92b77385 test
  |/   c
  |
  o  1:d2ae7f538514 test
  |  b
  |
  o  0:cb9a9f314b8b test
     a
  
  $ hg rebase -s 4 -d . --keep --confirm
  starting in-memory rebase
  rebasing 4:e860deea161a "e"
  merging e
  hit a merge conflict
  [1]
  $ hg log -G --template "{rev}:{short(node)} {person(author)}\n{firstline(desc)} {topic}\n\n"
  @  9:906d72f66a59 test
  |  conflict with e
  |
  o  8:12cbf031f469 test
  |  d
  |
  o  7:c83b1da5b1ae test
  |  c
  |
  o  6:baf10c5166d4 test
  |  g
  |
  o  5:6343ca3eff20 test
  |  f
  |
  | o  4:e860deea161a test
  | |  e
  | |
  | o  3:055a42cdd887 test
  | |  d
  | |
  | o  2:177f92b77385 test
  |/   c
  |
  o  1:d2ae7f538514 test
  |  b
  |
  o  0:cb9a9f314b8b test
     a
  
Test a metadata-only in-memory merge
  $ cd $TESTTMP
  $ hg init no_exception
  $ cd no_exception
# Produce the following graph:
#   o  'add +x to foo.txt'
#   | o  r1  (adds bar.txt, just for something to rebase to)
#   |/
#   o  r0   (adds foo.txt, no +x)
  $ echo hi > foo.txt
  $ hg ci -qAm r0
  $ echo hi > bar.txt
  $ hg ci -qAm r1
  $ hg co -qr ".^"
  $ chmod +x foo.txt
  $ hg ci -qAm 'add +x to foo.txt'
issue5960: this was raising an AttributeError exception
  $ hg rebase -r . -d 1
  rebasing 2:539b93e77479 tip "add +x to foo.txt"
  saved backup bundle to $TESTTMP/no_exception/.hg/strip-backup/*.hg (glob)
  $ hg diff -c tip
  diff --git a/foo.txt b/foo.txt
  old mode 100644
  new mode 100755

Test rebasing a commit with copy information, but no content changes

  $ cd ..
  $ hg clone -q repo1 merge-and-rename
  $ cd merge-and-rename
  $ cat << EOF >> .hg/hgrc
  > [experimental]
  > evolution.createmarkers=True
  > evolution.allowunstable=True
  > EOF
  $ hg co -q 1
  $ hg mv d e
  $ hg ci -qm 'rename d to e'
  $ hg co -q 3
  $ hg merge -q 4
  $ hg ci -m 'merge'
  $ hg co -q 2
  $ mv d e
  $ hg addremove -qs 0
  $ hg ci -qm 'untracked rename of d to e'
  $ hg debugobsolete -q `hg log -T '{node}' -r 4` `hg log -T '{node}' -r .`
  1 new orphan changesets
  $ hg tglog
  @  6: 676538af172d 'untracked rename of d to e'
  |
  | *    5: 574d92ad16fc 'merge'
  | |\
  | | x  4: 2c8b5dad7956 'rename d to e'
  | | |
  | o |  3: ca58782ad1e4 'b'
  |/ /
  o /  2: 814f6bd05178 'c'
  |/
  o  1: 02952614a83d 'd'
  |
  o  0: b173517d0057 'a'
  
  $ hg rebase -b 5 -d tip
  rebasing 3:ca58782ad1e4 "b"
  rebasing 5:574d92ad16fc "merge"
  note: not rebasing 5:574d92ad16fc "merge", its destination already has all its changes

  $ cd ..

Test rebasing a commit with copy information

  $ hg init rebase-rename
  $ cd rebase-rename
  $ echo a > a
  $ hg ci -Aqm 'add a'
  $ echo a2 > a
  $ hg ci -m 'modify a'
  $ hg co -q 0
  $ hg mv a b
  $ hg ci -qm 'rename a to b'
  $ hg rebase -d 1
  rebasing 2:b977edf6f839 tip "rename a to b"
  merging a and b to b
  saved backup bundle to $TESTTMP/rebase-rename/.hg/strip-backup/b977edf6f839-0864f570-rebase.hg
  $ hg st --copies --change .
  A b
    a
  R a
  $ cd ..

Test rebasing a commit with copy information, where the target is empty

  $ hg init rebase-rename-empty
  $ cd rebase-rename-empty
  $ echo a > a
  $ hg ci -Aqm 'add a'
  $ cat > a
  $ hg ci -m 'make a empty'
  $ hg co -q 0
  $ hg mv a b
  $ hg ci -qm 'rename a to b'
  $ hg rebase -d 1
  rebasing 2:b977edf6f839 tip "rename a to b"
  merging a and b to b
  saved backup bundle to $TESTTMP/rebase-rename-empty/.hg/strip-backup/b977edf6f839-0864f570-rebase.hg
  $ hg st --copies --change .
  A b
    a
  R a
  $ cd ..
Rebase across a copy with --collapse

  $ hg init rebase-rename-collapse
  $ cd rebase-rename-collapse
  $ echo a > a
  $ hg ci -Aqm 'add a'
  $ hg mv a b
  $ hg ci -m 'rename a to b'
  $ hg co -q 0
  $ echo a2 > a
  $ hg ci -qm 'modify a'
  $ hg rebase -r . -d 1 --collapse
  rebasing 2:41c4ea50d4cf tip "modify a"
  merging b and a to b
  saved backup bundle to $TESTTMP/rebase-rename-collapse/.hg/strip-backup/41c4ea50d4cf-b90b7994-rebase.hg
  $ cd ..

Test rebasing when the file we are merging in destination is empty

  $ hg init test
  $ cd test
  $ echo a > foo
  $ hg ci -Aqm 'added a to foo'

  $ rm foo
  $ touch foo
  $ hg di
  diff --git a/foo b/foo
  --- a/foo
  +++ b/foo
  @@ -1,1 +0,0 @@
  -a

  $ hg ci -m "make foo an empty file"

  $ hg up '.^'
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo b > foo
  $ hg di
  diff --git a/foo b/foo
  --- a/foo
  +++ b/foo
  @@ -1,1 +1,1 @@
  -a
  +b
  $ hg ci -m "add b to foo"
  created new head

  $ hg rebase -r . -d 1 --config ui.merge=internal:merge3
  rebasing 2:fb62b706688e tip "add b to foo"
  merging foo
  hit merge conflicts; rebasing that commit again in the working copy
  merging foo
  warning: conflicts while merging foo! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see 'hg resolve', then 'hg rebase --continue')
  [240]

  $ cd $TESTTMP

Test rebasing when we're in the middle of a rebase already
  $ hg init test_issue6214
  $ cd test_issue6214
  $ echo r0 > r0
  $ hg ci -qAm 'r0'
  $ echo hi > foo
  $ hg ci -qAm 'hi from foo'
  $ hg co -q '.^'
  $ echo bye > foo
  $ hg ci -qAm 'bye from foo'
  $ hg co -q '.^'
  $ echo unrelated > some_other_file
  $ hg ci -qAm 'some unrelated changes'
  $ hg log -G -T'{rev}: {desc}\n{files%"{file}\n"}'
  @  3: some unrelated changes
  |  some_other_file
  | o  2: bye from foo
  |/   foo
  | o  1: hi from foo
  |/   foo
  o  0: r0
     r0
  $ hg rebase -r 2 -d 1 -t:merge3
  rebasing 2:b4d249fbf8dd "bye from foo"
  merging foo
  hit merge conflicts; rebasing that commit again in the working copy
  merging foo
  warning: conflicts while merging foo! (edit, then use 'hg resolve --mark')
  unresolved conflicts (see 'hg resolve', then 'hg rebase --continue')
  [240]
  $ hg rebase -r 3 -d 1 -t:merge3
  abort: rebase in progress
  (use 'hg rebase --continue', 'hg rebase --abort', or 'hg rebase --stop')
  [20]
  $ hg resolve --list
  U foo
  $ hg resolve --all --re-merge -t:other
  (no more unresolved files)
  continue: hg rebase --continue
  $ hg rebase --continue
  rebasing 2:b4d249fbf8dd "bye from foo"
  saved backup bundle to $TESTTMP/test_issue6214/.hg/strip-backup/b4d249fbf8dd-299ec25c-rebase.hg
  $ hg log -G -T'{rev}: {desc}\n{files%"{file}\n"}'
  o  3: bye from foo
  |  foo
  | @  2: some unrelated changes
  | |  some_other_file
  o |  1: hi from foo
  |/   foo
  o  0: r0
     r0

  $ cd ..

Changesets that become empty should not be committed. Merges are not empty by
definition.

  $ hg init keep_merge
  $ cd keep_merge
  $ echo base > base; hg add base; hg ci -m base
  $ echo test > test; hg add test; hg ci -m a
  $ hg up 0 -q
  $ echo test > test; hg add test; hg ci -m b -q
  $ hg up 0 -q
  $ echo test > test; hg add test; hg ci -m c -q
  $ hg up 1 -q
  $ hg merge 2 -q
  $ hg ci -m merge
  $ hg up null -q
  $ hg tglog
  o    4: 59c8292117b1 'merge'
  |\
  | | o  3: 531f80391e4a 'c'
  | | |
  | o |  2: 0194f1db184a 'b'
  | |/
  o /  1: 6f252845ea45 'a'
  |/
  o  0: d20a80d4def3 'base'
  
  $ hg rebase -s 2 -d 3
  rebasing 2:0194f1db184a "b"
  note: not rebasing 2:0194f1db184a "b", its destination already has all its changes
  rebasing 4:59c8292117b1 tip "merge"
  saved backup bundle to $TESTTMP/keep_merge/.hg/strip-backup/0194f1db184a-aee31d03-rebase.hg
  $ hg tglog
  o    3: 506e2454484b 'merge'
  |\
  | o  2: 531f80391e4a 'c'
  | |
  o |  1: 6f252845ea45 'a'
  |/
  o  0: d20a80d4def3 'base'
  

  $ cd ..

Test (virtual) working directory without changes, created by merge conflict
resolution. There was a regression where the file was incorrectly detected as
changed although the file contents were the same as in the parent.

  $ hg init nofilechanges
  $ cd nofilechanges
  $ echo a > a; hg add a; hg ci -m a
  $ echo foo > test; hg add test; hg ci -m b
  $ hg up 0 -q
  $ echo bar > test; hg add test; hg ci -m c
  created new head
  $ hg rebase -d 2 -d 1 --tool :local
  rebasing 2:ca2749322ee5 tip "c"
  note: not rebasing 2:ca2749322ee5 tip "c", its destination already has all its changes
  saved backup bundle to $TESTTMP/nofilechanges/.hg/strip-backup/ca2749322ee5-6dc7e94b-rebase.hg