--- a/CHANGELOG	Mon Mar 19 15:20:40 2018 -0700
+++ b/CHANGELOG	Tue Mar 20 18:41:31 2018 +0530
@@ -10,6 +10,7 @@
   * evolve: `--continue` flag now continue evolving all the remaining revisions
   * prev and next now prompts user to choose a changeset in case of ambiguity
     when ui.interactive is turned on
+  * evolve: a new `--stop` flag which can be used to stop interrupted evolution
 
 7.2.2 -- (in-progress)
 ----------------------

--- a/hgext3rd/evolve/evolvecmd.py	Mon Mar 19 15:20:40 2018 -0700
+++ b/hgext3rd/evolve/evolvecmd.py	Tue Mar 20 18:41:31 2018 +0530
@@ -910,6 +910,18 @@
             raise error.Abort('cannot specify both "--any" and "--continue"')
         if opts['all']:
             raise error.Abort('cannot specify both "--all" and "--continue"')
+        if opts['rev']:
+            raise error.Abort('cannot specify both "--rev" and "--continue"')
+        if opts['stop']:
+            raise error.Abort('cannot specify both "--stop" and "--continue"')
+
+    if opts['stop']:
+        if opts['any']:
+            raise error.Abort('cannot specify both "--any" and "--stop"')
+        if opts['all']:
+            raise error.Abort('cannot specify both "--all" and "--stop"')
+        if opts['rev']:
+            raise error.Abort('cannot specify both "--rev" and "--stop"')
 
     if opts['rev']:
         if opts['any']:
@@ -992,6 +1004,7 @@
      ('a', 'all', False, _('evolve all troubled changesets related to the '
                            'current  working directory and its descendants')),
      ('c', 'continue', False, _('continue an interrupted evolution')),
+     ('', 'stop', False, _('stop the interrupted evolution')),
      ('l', 'list', False, 'provide details on troubled changesets in the repo'),
     ] + mergetoolopts,
     _('[OPTIONS]...')
@@ -1075,6 +1088,7 @@
     dryrunopt = opts['dry_run']
     confirmopt = opts['confirm']
     revopt = opts['rev']
+    stopopt = opts['stop']
 
     troublecategories = ['phase_divergent', 'content_divergent', 'orphan']
     specifiedcategories = [t.replace('_', '')
@@ -1139,6 +1153,16 @@
             return
         startnode = repo.unfiltered()[evolvestate['startnode']]
         evolvestate.delete()
+    elif stopopt:
+        if not evolvestate:
+            raise error.Abort(_('no interrupted evolve to stop'))
+        evolvestate.load()
+        pctx = repo['.']
+        hg.updaterepo(repo, pctx.node(), True)
+        ui.status(_('stopped the interrupted evolve\n'))
+        ui.status(_('working directory is now at %s\n') % pctx)
+        evolvestate.delete()
+        return
     else:
         cmdutil.bailifchanged(repo)
 

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-evolve-stop.t	Tue Mar 20 18:41:31 2018 +0530
@@ -0,0 +1,382 @@
+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