tests/test-rebase-scenario-global.t

filectx: use ctx.size comparisons to speed up ctx.cmp

Comparing sizes is cheaper than comparing file contents, as it does not
involve reading the file on disk or from the filelog.

It is however not always possible: some extensions, or encode filters,
change data when extracting it to the working directory.

  $ cat >> $HGRCPATH <<EOF
  > [extensions]
  > graphlog=
  > rebase=
  > 
  > [alias]
  > tglog = log -G --template "{rev}: '{desc}' {branches}\n"
  > EOF


  $ hg init a
  $ cd a

  $ echo A > A
  $ hg ci -Am A
  adding A

  $ echo B > B
  $ hg ci -Am B
  adding B

  $ hg up -q -C 0

  $ echo C > C
  $ hg ci -Am C
  adding C
  created new head

  $ hg up -q -C 0

  $ echo D > D
  $ hg ci -Am D
  adding D
  created new head

  $ hg merge -r 2
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)

  $ hg ci -m E

  $ hg up -q -C 3

  $ echo F > F
  $ hg ci -Am F
  adding F
  created new head

  $ cd ..


Rebasing
B onto F - simple rebase:

  $ hg clone -q -u . a a1
  $ cd a1

  $ hg tglog
  @  5: 'F'
  |
  | o  4: 'E'
  |/|
  o |  3: 'D'
  | |
  | o  2: 'C'
  |/
  | o  1: 'B'
  |/
  o  0: 'A'
  
  $ hg rebase -s 1 -d 5
  saved backup bundle to $TESTTMP/a1/.hg/strip-backup/*-backup.hg (glob)

  $ hg tglog
  @  5: 'B'
  |
  o  4: 'F'
  |
  | o  3: 'E'
  |/|
  o |  2: 'D'
  | |
  | o  1: 'C'
  |/
  o  0: 'A'
  
  $ cd ..


B onto D - intermediate point:

  $ hg clone -q -u . a a2
  $ cd a2

  $ hg rebase -s 1 -d 3
  saved backup bundle to $TESTTMP/a2/.hg/strip-backup/*-backup.hg (glob)

  $ hg tglog
  @  5: 'B'
  |
  | o  4: 'F'
  |/
  | o  3: 'E'
  |/|
  o |  2: 'D'
  | |
  | o  1: 'C'
  |/
  o  0: 'A'
  
  $ cd ..


C onto F - skip of E:

  $ hg clone -q -u . a a3
  $ cd a3

  $ hg rebase -s 2 -d 5
  saved backup bundle to $TESTTMP/a3/.hg/strip-backup/*-backup.hg (glob)

  $ hg tglog
  @  4: 'C'
  |
  o  3: 'F'
  |
  o  2: 'D'
  |
  | o  1: 'B'
  |/
  o  0: 'A'
  
  $ cd ..


D onto C - rebase of a branching point (skip E):

  $ hg clone -q -u . a a4
  $ cd a4

  $ hg rebase -s 3 -d 2
  saved backup bundle to $TESTTMP/a4/.hg/strip-backup/*-backup.hg (glob)

  $ hg tglog
  @  4: 'F'
  |
  o  3: 'D'
  |
  o  2: 'C'
  |
  | o  1: 'B'
  |/
  o  0: 'A'
  
  $ cd ..


E onto F - merged revision having a parent in ancestors of target:

  $ hg clone -q -u . a a5
  $ cd a5

  $ hg rebase -s 4 -d 5
  saved backup bundle to $TESTTMP/a5/.hg/strip-backup/*-backup.hg (glob)

  $ hg tglog
  @    5: 'E'
  |\
  | o  4: 'F'
  | |
  | o  3: 'D'
  | |
  o |  2: 'C'
  |/
  | o  1: 'B'
  |/
  o  0: 'A'
  
  $ cd ..


D onto B - E maintains C as parent:

  $ hg clone -q -u . a a6
  $ cd a6

  $ hg rebase -s 3 -d 1
  saved backup bundle to $TESTTMP/a6/.hg/strip-backup/*-backup.hg (glob)

  $ hg tglog
  @  5: 'F'
  |
  | o  4: 'E'
  |/|
  o |  3: 'D'
  | |
  | o  2: 'C'
  | |
  o |  1: 'B'
  |/
  o  0: 'A'
  
  $ cd ..


These will fail (using --source):

E onto D - rebase onto an ancestor:

  $ hg clone -q -u . a a7
  $ cd a7

  $ hg rebase -s 4 -d 3
  abort: source is descendant of destination
  [255]

D onto E - rebase onto a descendant:

  $ hg rebase -s 3 -d 4
  abort: source is ancestor of destination
  [255]

E onto B - merge revision with both parents not in ancestors of target:

  $ hg rebase -s 4 -d 1
  abort: cannot use revision 4 as base, result would have 3 parents
  [255]


These will abort gracefully (using --base):

E onto E - rebase onto same changeset:

  $ hg rebase -b 4 -d 4
  nothing to rebase
  [1]

E onto D - rebase onto an ancestor:

  $ hg rebase -b 4 -d 3
  nothing to rebase
  [1]

D onto E - rebase onto a descendant:

  $ hg rebase -b 3 -d 4
  nothing to rebase
  [1]