tests/test-rebase-mq-skip.t

scmutil: add function to help handling workingctx in arithmetic operation

It's unfortunate that workingctx revision is None, which doesn't work well in
arithmetic operation or comparison. This function is trivial but will be used
in several places.

This emulates the effects of an hg pull --rebase in which the remote repo
already has one local mq patch

  $ cat >> $HGRCPATH <<EOF
  > [extensions]
  > rebase=
  > mq=
  > 
  > [phases]
  > publish=False
  > 
  > [alias]
  > tglog = log -G --template "{rev}: '{desc}' tags: {tags}\n"
  > EOF


  $ hg init a
  $ cd a
  $ hg qinit -c

  $ echo c1 > c1
  $ hg add c1
  $ hg ci -m C1

  $ echo r1 > r1
  $ hg add r1
  $ hg ci -m R1

  $ hg up -q 0

  $ hg qnew p0.patch -d '1 0'
  $ echo p0 > p0
  $ hg add p0
  $ hg qref -m P0

  $ hg qnew p1.patch -d '2 0'
  $ echo p1 > p1
  $ hg add p1
  $ hg qref -m P1

  $ hg export qtip > p1.patch

  $ hg up -q -C 1

  $ hg import p1.patch
  applying p1.patch

  $ rm p1.patch

  $ hg up -q -C qtip

  $ hg rebase -v
  rebasing 2:13a46ce44f60 "P0" (p0.patch qbase)
  resolving manifests
  removing p0
  getting r1
  resolving manifests
  getting p0
  committing files:
  p0
  committing manifest
  committing changelog
  rebasing 3:148775c71080 "P1" (p1.patch qtip)
  resolving manifests
  note: rebase of 3:148775c71080 created no changes to commit
  rebase merging completed
  updating mq patch p0.patch to 5:9ecc820b1737
  $TESTTMP/a/.hg/patches/p0.patch (glob)
  2 changesets found
  uncompressed size of bundle content:
       344 (changelog)
       284 (manifests)
       109  p0
       109  p1
  saved backup bundle to $TESTTMP/a/.hg/strip-backup/13a46ce44f60-5da6ecfb-backup.hg (glob)
  2 changesets found
  uncompressed size of bundle content:
       399 (changelog)
       284 (manifests)
       109  p0
       109  p1
  adding branch
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files
  rebase completed
  1 revisions have been skipped

  $ hg tglog
  @  3: 'P0' tags: p0.patch qbase qtip tip
  |
  o  2: 'P1' tags: qparent
  |
  o  1: 'R1' tags:
  |
  o  0: 'C1' tags:
  
  $ cd ..


  $ hg init b
  $ cd b
  $ hg qinit -c

  $ for i in r0 r1 r2 r3 r4 r5 r6;
  > do
  >     echo $i > $i
  >     hg ci -Am $i
  > done
  adding r0
  adding r1
  adding r2
  adding r3
  adding r4
  adding r5
  adding r6

  $ hg qimport -r 1:tip

  $ hg up -q 0

  $ for i in r1 r3 r7 r8;
  > do
  >     echo $i > $i
  >     hg ci -Am branch2-$i
  > done
  adding r1
  created new head
  adding r3
  adding r7
  adding r8

  $ echo somethingelse > r4
  $ hg ci -Am branch2-r4
  adding r4

  $ echo r6 > r6
  $ hg ci -Am branch2-r6
  adding r6

  $ hg up -q qtip

  $ HGMERGE=internal:fail hg rebase
  rebasing 1:b4bffa6e4776 "r1" (1.diff qbase)
  note: rebase of 1:b4bffa6e4776 created no changes to commit
  rebasing 2:c0fd129beb01 "r2" (2.diff)
  rebasing 3:6ff5b8feed8e "r3" (3.diff)
  note: rebase of 3:6ff5b8feed8e created no changes to commit
  rebasing 4:094320fec554 "r4" (4.diff)
  unresolved conflicts (see hg resolve, then hg rebase --continue)
  [1]

  $ HGMERGE=internal:local hg resolve --all
  (no more unresolved files)

  $ hg rebase --continue
  already rebased 1:b4bffa6e4776 "r1" (1.diff qbase) as 057f55ff8f44
  already rebased 2:c0fd129beb01 "r2" (2.diff) as 1660ab13ce9a
  already rebased 3:6ff5b8feed8e "r3" (3.diff) as 1660ab13ce9a
  rebasing 4:094320fec554 "r4" (4.diff)
  note: rebase of 4:094320fec554 created no changes to commit
  rebasing 5:681a378595ba "r5" (5.diff)
  rebasing 6:512a1f24768b "r6" (6.diff qtip)
  note: rebase of 6:512a1f24768b created no changes to commit
  saved backup bundle to $TESTTMP/b/.hg/strip-backup/b4bffa6e4776-b9bfb84d-backup.hg (glob)

  $ hg tglog
  @  8: 'r5' tags: 5.diff qtip tip
  |
  o  7: 'r2' tags: 2.diff qbase
  |
  o  6: 'branch2-r6' tags: qparent
  |
  o  5: 'branch2-r4' tags:
  |
  o  4: 'branch2-r8' tags:
  |
  o  3: 'branch2-r7' tags:
  |
  o  2: 'branch2-r3' tags:
  |
  o  1: 'branch2-r1' tags:
  |
  o  0: 'r0' tags:
  

  $ cd ..