view tests/test-evolve-stop.t @ 3577:279d8b610ac5

evolve: add a `--stop` flag for `hg evolve` command

This patch adds a `--stop` flag for `hg evolve` command. The stop flag lets you
stop the evolution from where you are and let you move to other things if you
want. This fuctionality is great as user can decide to resolve conflicts later
on, stop the command execution, do something else and get back once they has
time or care about resolving them.

As implementation details, it clears the evolvestate, updates to the parent of
working directory clearing the uncommitted changes which also deletes the
mergestate.

A new test file test-evolve-stop.t is added with tests of the new flag added.

Tests for the --stop flag for `hg evolve` command
=================================================

The `--stop` flag stops the interrupted evolution and delete the state file so
user can do other things and comeback and do evolution later on

Setup
=====

  $ cat >> $HGRCPATH <<EOF
  > [alias]
  > glog = log -GT "{rev}:{node|short} {desc}\n ({bookmarks}) {phase}"
  > [extensions]
  > EOF
  $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext3rd/evolve/" >> $HGRCPATH

  $ hg init stoprepo
  $ cd stoprepo
  $ echo ".*\.orig" > .hgignore
  $ hg add .hgignore
  $ hg ci -m "added hgignore"
  $ for ch in a b c d; do echo foo > $ch; hg add $ch; hg ci -qm "added "$ch; done;

  $ hg glog
  @  4:c41c793e0ef1 added d
  |   () draft
  o  3:ca1b80f7960a added c
  |   () draft
  o  2:b1661037fa25 added b
  |   () draft
  o  1:c7586e2a9264 added a
  |   () draft
  o  0:8fa14d15e168 added hgignore
      () draft

Testing `--stop` when no evolve is interrupted
==============================================

  $ hg evolve --stop
  abort: no interrupted evolve to stop
  [255]

Testing with wrong combinations of flags
========================================

  $ hg evolve --stop --rev 1
  abort: cannot specify both "--rev" and "--stop"
  [255]

  $ hg evolve --stop --continue
  abort: cannot specify both "--stop" and "--continue"
  [255]

  $ hg evolve --stop --all
  abort: cannot specify both "--all" and "--stop"
  [255]

  $ hg evolve --stop --any
  abort: cannot specify both "--any" and "--stop"
  [255]

Testing when only one revision is to evolve
===========================================

  $ hg prev
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  [3] added c
  $ echo bar > d
  $ hg add d
  $ hg amend
  1 new orphan changesets
  $ hg glog
  @  5:cb6a2ab625bb added c
  |   () draft
  | *  4:c41c793e0ef1 added d
  | |   () draft
  | x  3:ca1b80f7960a added c
  |/    () draft
  o  2:b1661037fa25 added b
  |   () draft
  o  1:c7586e2a9264 added a
  |   () draft
  o  0:8fa14d15e168 added hgignore
      () draft

  $ hg evolve
  move:[4] added d
  atop:[5] added c
  merging d
  warning: conflicts while merging d! (edit, then use 'hg resolve --mark')
  evolve failed!
  fix conflict and run 'hg evolve --continue' or use 'hg update -C .' to abort
  abort: unresolved merge conflicts (see hg help resolve)
  [255]

  $ hg evolve --stop
  stopped the interrupted evolve
  working directory is now at cb6a2ab625bb

Checking whether evolvestate file exists or not
  $ cat .hg/evolvestate
  cat: .hg/evolvestate: No such file or directory
  [1]

Checking where we are
  $ hg id
  cb6a2ab625bb tip

Checking working dir
  $ hg status
Checking for incomplete mergestate
  $ ls .hg/merge
  ls: cannot access .?\.hg/merge.?: No such file or directory (re)
  [2]

Checking graph
  $ hg glog
  @  5:cb6a2ab625bb added c
  |   () draft
  | *  4:c41c793e0ef1 added d
  | |   () draft
  | x  3:ca1b80f7960a added c
  |/    () draft
  o  2:b1661037fa25 added b
  |   () draft
  o  1:c7586e2a9264 added a
  |   () draft
  o  0:8fa14d15e168 added hgignore
      () draft

Testing the stop flag in case conflicts are caused by `hg next --evolve`
========================================================================

  $ hg next --evolve
  move:[4] added d
  atop:[5] added c
  merging d
  warning: conflicts while merging d! (edit, then use 'hg resolve --mark')
  evolve failed!
  fix conflict and run 'hg evolve --continue' or use 'hg update -C .' to abort
  abort: unresolved merge conflicts (see hg help resolve)
  [255]

  $ hg diff
  diff -r cb6a2ab625bb d
  --- a/d	Thu Jan 01 00:00:00 1970 +0000
  +++ b/d	Thu Jan 01 00:00:00 1970 +0000
  @@ -1,1 +1,5 @@
  +<<<<<<< destination: cb6a2ab625bb - test: added c
   bar
  +=======
  +foo
  +>>>>>>> evolving:    c41c793e0ef1 - test: added d

  $ hg evolve --stop
  stopped the interrupted evolve
  working directory is now at cb6a2ab625bb

  $ hg glog
  @  5:cb6a2ab625bb added c
  |   () draft
  | *  4:c41c793e0ef1 added d
  | |   () draft
  | x  3:ca1b80f7960a added c
  |/    () draft
  o  2:b1661037fa25 added b
  |   () draft
  o  1:c7586e2a9264 added a
  |   () draft
  o  0:8fa14d15e168 added hgignore
      () draft

  $ hg status

Checking when multiple revs need to be evolved, some revs evolve without
conflicts
=========================================================================

Making sure obsmarkers should be on evolved changeset and not rest of them once
we do `evolve --stop`
--------------------------------------------------------------------------------

  $ hg evolve
  move:[4] added d
  atop:[5] added c
  merging d
  warning: conflicts while merging d! (edit, then use 'hg resolve --mark')
  evolve failed!
  fix conflict and run 'hg evolve --continue' or use 'hg update -C .' to abort
  abort: unresolved merge conflicts (see hg help resolve)
  [255]
  $ echo foo > d
  $ hg resolve -m
  (no more unresolved files)
  continue: hg evolve --continue
  $ hg evolve --continue
  evolving 4:c41c793e0ef1 "added d"
  working directory is now at 2a4e03d422e2
  $ hg glog
  @  6:2a4e03d422e2 added d
  |   () draft
  o  5:cb6a2ab625bb added c
  |   () draft
  o  2:b1661037fa25 added b
  |   () draft
  o  1:c7586e2a9264 added a
  |   () draft
  o  0:8fa14d15e168 added hgignore
      () draft

  $ hg up .^^^^
  0 files updated, 0 files merged, 4 files removed, 0 files unresolved
  $ echo bar > c
  $ hg add c
  $ hg amend
  4 new orphan changesets

  $ hg glog
  @  7:21817cd42526 added hgignore
      () draft
  *  6:2a4e03d422e2 added d
  |   () draft
  *  5:cb6a2ab625bb added c
  |   () draft
  *  2:b1661037fa25 added b
  |   () draft
  *  1:c7586e2a9264 added a
  |   () draft
  x  0:8fa14d15e168 added hgignore
      () draft

  $ hg evolve --all
  move:[1] added a
  atop:[7] added hgignore
  move:[2] added b
  atop:[8] added a
  move:[5] added c
  atop:[9] added b
  merging c
  warning: conflicts while merging c! (edit, then use 'hg resolve --mark')
  evolve failed!
  fix conflict and run 'hg evolve --continue' or use 'hg update -C .' to abort
  abort: unresolved merge conflicts (see hg help resolve)
  [255]

  $ hg status
  M c
  A d

  $ hg evolve --stop
  stopped the interrupted evolve
  working directory is now at aec285328e90

Only changeset which has a successor now are obsoleted
  $ hg glog
  @  9:aec285328e90 added b
  |   () draft
  o  8:fd00db71edca added a
  |   () draft
  o  7:21817cd42526 added hgignore
      () draft
  *  6:2a4e03d422e2 added d
  |   () draft
  *  5:cb6a2ab625bb added c
  |   () draft
  x  2:b1661037fa25 added b
  |   () draft
  x  1:c7586e2a9264 added a
  |   () draft
  x  0:8fa14d15e168 added hgignore
      () draft

Making sure doing evolve again resumes from right place and does the right thing

  $ hg evolve --all
  move:[5] added c
  atop:[9] added b
  merging c
  warning: conflicts while merging c! (edit, then use 'hg resolve --mark')
  evolve failed!
  fix conflict and run 'hg evolve --continue' or use 'hg update -C .' to abort
  abort: unresolved merge conflicts (see hg help resolve)
  [255]

  $ echo foobar > c
  $ hg resolve -m
  (no more unresolved files)
  continue: hg evolve --continue
  $ hg evolve --continue
  evolving 5:cb6a2ab625bb "added c"
  move:[6] added d
  atop:[10] added c
  working directory is now at cd0909a30222
  $ hg glog
  @  11:cd0909a30222 added d
  |   () draft
  o  10:cb1dd1086ef6 added c
  |   () draft
  o  9:aec285328e90 added b
  |   () draft
  o  8:fd00db71edca added a
  |   () draft
  o  7:21817cd42526 added hgignore
      () draft

Bookmarks should only be moved of the changesets which have been evolved,
bookmarks of rest of them should stay where they are are
-------------------------------------------------------------------------

  $ hg up .^
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg bookmark b1
  $ hg up .^
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  (leaving bookmark b1)
  $ hg bookmark b2

  $ hg glog
  o  11:cd0909a30222 added d
  |   () draft
  o  10:cb1dd1086ef6 added c
  |   (b1) draft
  @  9:aec285328e90 added b
  |   (b2) draft
  o  8:fd00db71edca added a
  |   () draft
  o  7:21817cd42526 added hgignore
      () draft

  $ hg prev
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  [8] added a
  $ echo tom > c
  $ hg amend
  3 new orphan changesets

  $ hg glog
  @  12:a3cc2042492f added a
  |   () draft
  | *  11:cd0909a30222 added d
  | |   () draft
  | *  10:cb1dd1086ef6 added c
  | |   (b1) draft
  | *  9:aec285328e90 added b
  | |   (b2) draft
  | x  8:fd00db71edca added a
  |/    () draft
  o  7:21817cd42526 added hgignore
      () draft

  $ hg evolve --all
  move:[9] added b
  atop:[12] added a
  move:[10] added c
  atop:[13] added b
  merging c
  warning: conflicts while merging c! (edit, then use 'hg resolve --mark')
  evolve failed!
  fix conflict and run 'hg evolve --continue' or use 'hg update -C .' to abort
  abort: unresolved merge conflicts (see hg help resolve)
  [255]

  $ hg evolve --stop
  stopped the interrupted evolve
  working directory is now at a3f4b95da934

Bookmarks of only the changeset which are evolved is moved
  $ hg glog
  @  13:a3f4b95da934 added b
  |   (b2) draft
  o  12:a3cc2042492f added a
  |   () draft
  | *  11:cd0909a30222 added d
  | |   () draft
  | *  10:cb1dd1086ef6 added c
  | |   (b1) draft
  | x  9:aec285328e90 added b
  | |   () draft
  | x  8:fd00db71edca added a
  |/    () draft
  o  7:21817cd42526 added hgignore
      () draft