view tests/test-backout.t @ 11948:88d4911930bf

contrib/setup3k.py: added script to build hg with py3k

This patch implements a script that inherits most of its functionality from
hg's setup.py and adds support to calling 2to3 during invocation with python3.
The motivation of having this script around is twofold:

 1) It enables py3k crazies to test mercurial in py3k and, hopefully, patch it
    more easily, so it can improve the py3k support to eventually run there.

 2) Being separated from the main setup.py eliminates the need to make hg's
    setup.py even more cluttered, and enables "independent" development until
    the port is done.

Some considerations about the structure of this patch:

Mercurial already overrides the behavior of build_py, this patch tweaks it a bit
more to add support to call 2to3 with a custom fixer* location for Mercurial.
There is also a need of having the core C modules built *before* the
translation process starts, otherwise 2to3 will think those are global modules.

* A fixer is a python module that transforms python 2.x code in python 3.x
code.

  $ HGMERGE=true; export HGMERGE

  $ hg init basic
  $ cd basic

# should complain

  $ hg backout
  abort: please specify a revision to backout
  $ hg backout -r 0 0
  abort: please specify just one revision

# basic operation

  $ echo a > a
  $ hg commit -d '0 0' -A -m a
  adding a
  $ echo b >> a
  $ hg commit -d '1 0' -m b

  $ hg backout -d '2 0' tip
  reverting a
  changeset 2:2929462c3dff backs out changeset 1:a820f4f40a57
  $ cat a
  a

# file that was removed is recreated

  $ cd ..
  $ hg init remove
  $ cd remove

  $ echo content > a
  $ hg commit -d '0 0' -A -m a
  adding a

  $ hg rm a
  $ hg commit -d '1 0' -m b

  $ hg backout -d '2 0' --merge tip
  adding a
  changeset 2:de31bdc76c0d backs out changeset 1:76862dcce372
  $ cat a
  content

# backout of backout is as if nothing happened

  $ hg backout -d '3 0' --merge tip
  removing a
  changeset 3:7f6d0f120113 backs out changeset 2:de31bdc76c0d
  $ cat a 2>/dev/null || echo cat: a: No such file or directory
  cat: a: No such file or directory

# across branch

  $ cd ..
  $ hg init branch
  $ cd branch
  $ echo a > a
  $ hg ci -Am0
  adding a
  $ echo b > b
  $ hg ci -Am1
  adding b
  $ hg co -C 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved

should fail

  $ hg backout 1
  abort: cannot backout change on a different branch
  $ echo c > c
  $ hg ci -Am2
  adding c
  created new head

should fail

  $ hg backout 1
  abort: cannot backout change on a different branch

# backout with merge

  $ cd ..
  $ hg init merge
  $ cd merge

  $ echo line 1 > a
  $ echo line 2 >> a
  $ hg commit -d '0 0' -A -m a
  adding a

remove line 1

  $ echo line 2 > a
  $ hg commit -d '1 0' -m b

  $ echo line 3 >> a
  $ hg commit -d '2 0' -m c

  $ hg backout --merge -d '3 0' 1
  reverting a
  created new head
  changeset 3:26b8ccb9ad91 backs out changeset 1:5a50a024c182
  merging with changeset 3:26b8ccb9ad91
  merging a
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg commit -d '4 0' -m d

check line 1 is back

  $ cat a
  line 1
  line 2
  line 3

# backout should not back out subsequent changesets

  $ hg init onecs
  $ cd onecs
  $ echo 1 > a
  $ hg commit -d '0 0' -A -m a
  adding a
  $ echo 2 >> a
  $ hg commit -d '1 0' -m b
  $ echo 1 > b
  $ hg commit -d '2 0' -A -m c
  adding b
  $ hg backout -d '3 0' 1
  reverting a
  created new head
  changeset 3:3202beb76721 backs out changeset 1:22bca4c721e5
  the backout changeset is a new head - do not forget to merge
  (use "backout --merge" if you want to auto-merge)
  $ hg locate b
  b
  $ hg update -C tip
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg locate b

  $ cd ..
  $ hg init m
  $ cd m
  $ echo a > a
  $ hg commit -d '0 0' -A -m a
  adding a
  $ echo b > b
  $ hg commit -d '1 0' -A -m b
  adding b
  $ echo c > c
  $ hg commit -d '2 0' -A -m b
  adding c
  $ hg update 1
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo d > d
  $ hg commit -d '3 0' -A -m c
  adding d
  created new head
  $ hg merge 2
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg commit -d '4 0' -A -m d

# backout of merge should fail

  $ hg backout 4
  abort: cannot backout a merge changeset without --parent

# backout of merge with bad parent should fail

  $ hg backout --parent 0 4
  abort: cb9a9f314b8b is not a parent of b2f3bb92043e

# backout of non-merge with parent should fail

  $ hg backout --parent 0 3
  abort: cannot use --parent on non-merge changeset

# backout with valid parent should be ok

  $ hg backout -d '5 0' --parent 2 4
  removing d
  changeset 5:10e5328c8435 backs out changeset 4:b2f3bb92043e

  $ hg rollback
  rolling back to revision 4 (undo commit)
  $ hg update -C
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg backout -d '6 0' --parent 3 4
  removing c
  changeset 5:033590168430 backs out changeset 4:b2f3bb92043e

  $ cd ..

# named branches

  $ hg init named_branches
  $ cd named_branches

  $ echo default > default
  $ hg ci -d '0 0' -Am default
  adding default
  $ hg branch branch1
  marked working directory as branch branch1
  $ echo branch1 > file1
  $ hg ci -d '1 0' -Am file1
  adding file1
  $ hg branch branch2
  marked working directory as branch branch2
  $ echo branch2 > file2
  $ hg ci -d '2 0' -Am file2
  adding file2
  $ hg backout -d '3 0' -r 1 -m 'backout on branch1'
  removing file1
  created new head
  changeset 3:d4e8f6db59fb backs out changeset 1:bf1602f437f3
  the backout changeset is a new head - do not forget to merge
  (use "backout --merge" if you want to auto-merge)

XXX maybe backout shouldn't suggest a merge here as it is a different branch?

on branch2 with branch1 not merged, so file1 should still exist:

  $ hg id
  45bbcd363bf0 (branch2)
  $ hg st -A
  C default
  C file1
  C file2

on branch2 with branch1 merged, so file1 should be gone:

  $ hg merge
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ hg ci -d '4 0' -m 'merge backout of branch1'
  $ hg id
  22149cdde76d (branch2) tip
  $ hg st -A
  C default
  C file2

on branch1, so no file1 and file2:

  $ hg co -C branch1
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg id
  bf1602f437f3 (branch1)
  $ hg st -A
  C default
  C file1

  $ exit 0