diff tests/test-graft.t @ 38292:2ec44160165d

graft: add a new `--stop` flag to stop interrupted graft

This patch adds a new flag `--stop` to `hg graft` command which stops the
interrupted graft.

The `--stop` flag takes back you to the last successful step i.e. it will keep
your grafted commits, it will just clear the mergestate and interrupted graft
state.

The `--stop` is different from `--abort` flag as the latter also undoes all the
work done till now which is sometimes not what the user wants.

Suppose you grafted a lot of changesets, you encountered conflicts, you resolved
them, did `hg graft --continue`, again encountered conflicts, continue, again
encountered conflicts. Now you are tired of solving merge conflicts and want to
resume this sometimes later. If you use the `--abort` functionality, it will
strip your already grafted changesets, making you loose the work you have done
resolving merge conflicts.

A general goal related to this flag is to add this flag to `rebase` and
`histedit` too. The evolve command already has this --stop flag.

Tests are added for the new flag.

.. feature::

   `hg graft` now has a `--stop` flag to stop interrupted graft.

Differential Revision: https://phab.mercurial-scm.org/D3668

--- a/tests/test-graft.t	Tue Jun 12 02:36:34 2018 +0530
+++ b/tests/test-graft.t	Mon May 28 21:13:32 2018 +0530
@@ -244,7 +244,7 @@
 
   $ hg ci -m 'commit interrupted graft'
   abort: graft in progress
-  (use 'hg graft --continue' or 'hg update' to abort)
+  (use 'hg graft --continue' or 'hg graft --stop' to abort)
   [255]
 
 Abort the graft and try committing:
@@ -1565,3 +1565,108 @@
   o  3:9e887f7a939c bar to b
   |
   ~
+
+  $ cd ..
+
+Testing the --stop flag of `hg graft` which stops the interrupted graft
+
+  $ hg init stopgraft
+  $ cd stopgraft
+  $ for ch in a b c d; do echo $ch > $ch; hg add $ch; hg ci -Aqm "added "$ch; done;
+
+  $ hg log -G
+  @  changeset:   3:9150fe93bec6
+  |  tag:         tip
+  |  user:        test
+  |  date:        Thu Jan 01 00:00:00 1970 +0000
+  |  summary:     added d
+  |
+  o  changeset:   2:155349b645be
+  |  user:        test
+  |  date:        Thu Jan 01 00:00:00 1970 +0000
+  |  summary:     added c
+  |
+  o  changeset:   1:5f6d8a4bf34a
+  |  user:        test
+  |  date:        Thu Jan 01 00:00:00 1970 +0000
+  |  summary:     added b
+  |
+  o  changeset:   0:9092f1db7931
+     user:        test
+     date:        Thu Jan 01 00:00:00 1970 +0000
+     summary:     added a
+  
+  $ hg up '.^^'
+  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
+
+  $ echo foo > d
+  $ hg ci -Aqm "added foo to d"
+
+  $ hg graft --stop
+  abort: no interrupted graft found
+  [255]
+
+  $ hg graft -r 3
+  grafting 3:9150fe93bec6 "added d"
+  merging d
+  warning: conflicts while merging d! (edit, then use 'hg resolve --mark')
+  abort: unresolved conflicts, can't continue
+  (use 'hg resolve' and 'hg graft --continue')
+  [255]
+
+  $ hg graft --stop --continue
+  abort: cannot use '--continue' and '--stop' together
+  [255]
+
+  $ hg graft --stop -U
+  abort: cannot specify any other flag with '--stop'
+  [255]
+  $ hg graft --stop --rev 4
+  abort: cannot specify any other flag with '--stop'
+  [255]
+  $ hg graft --stop --log
+  abort: cannot specify any other flag with '--stop'
+  [255]
+
+  $ hg graft --stop
+  stopped the interrupted graft
+  working directory is now at a0deacecd59d
+
+  $ hg diff
+
+  $ hg log -Gr '.'
+  @  changeset:   4:a0deacecd59d
+  |  tag:         tip
+  ~  parent:      1:5f6d8a4bf34a
+     user:        test
+     date:        Thu Jan 01 00:00:00 1970 +0000
+     summary:     added foo to d
+  
+  $ hg graft -r 2 -r 3
+  grafting 2:155349b645be "added c"
+  grafting 3:9150fe93bec6 "added d"
+  merging d
+  warning: conflicts while merging d! (edit, then use 'hg resolve --mark')
+  abort: unresolved conflicts, can't continue
+  (use 'hg resolve' and 'hg graft --continue')
+  [255]
+
+  $ hg graft --stop
+  stopped the interrupted graft
+  working directory is now at 75b447541a9e
+
+  $ hg diff
+
+  $ hg log -G -T "{rev}:{node|short} {desc}"
+  @  5:75b447541a9e added c
+  |
+  o  4:a0deacecd59d added foo to d
+  |
+  | o  3:9150fe93bec6 added d
+  | |
+  | o  2:155349b645be added c
+  |/
+  o  1:5f6d8a4bf34a added b
+  |
+  o  0:9092f1db7931 added a
+