evolution: report new unstable changesets

This adds a transaction summary callback that reports the number of
new orphan, content-divergent and phase-divergent changesets.

The code for reporting it is based on the code from the evolve
extension, but simplified a bit. It simply counts the numbers for each
kind of instability before and after the transaction. That's obviously
not very efficient, but it's easy to reason about, so I'm doing this
as a first step that can make us quite confident about the test case
changes. We can optimize it later and make sure that the tests are not
affected. The code has been used in the evolve extension for a long
time and has apparently been sufficiently fast, so it doesn't seem
like a pressing issue.

Unlike the evolve extension's version of this report, this version
applies to all commands (or all transactions run as part of any
command, to be exact).

Differential Revision: https://phab.mercurial-scm.org/D1867

mercurial/scmutil.py

@@ -1222,6 +1222,9 b' class simplekeyvaluefile(object):'
     'unbundle',
 ]
 
+# A marker that tells the evolve extension to suppress its own reporting
+_reportstroubledchangesets = True
+
 def registersummarycallback(repo, otr, txnname=''):
     """register a callback to issue a summary after the transaction is closed
     """
@@ -1257,6 +1260,32 b' def registersummarycallback(repo, otr, t'
                 repo.ui.status(_('obsoleted %i changesets\n')
                                % len(obsoleted))
 
+    if obsolete.isenabled(repo, obsolete.createmarkersopt):
+        instabilitytypes = [
+            ('orphan', 'orphan'),
+            ('phase-divergent', 'phasedivergent'),
+            ('content-divergent', 'contentdivergent'),
+        ]
+
+        def getinstabilitycounts(repo):
+            filtered = repo.changelog.filteredrevs
+            counts = {}
+            for instability, revset in instabilitytypes:
+                counts[instability] = len(set(obsolete.getrevs(repo, revset)) -
+                                          filtered)
+            return counts
+
+        oldinstabilitycounts = getinstabilitycounts(repo)
+        @reportsummary
+        def reportnewinstabilities(repo, tr):
+            newinstabilitycounts = getinstabilitycounts(repo)
+            for instability, revset in instabilitytypes:
+                delta = (newinstabilitycounts[instability] -
+                         oldinstabilitycounts[instability])
+                if delta > 0:
+                    repo.ui.warn(_('%i new %s changesets\n') %
+                                 (delta, instability))
+
     if txmatch(_reportnewcssource):
         @reportsummary
         def reportnewcs(repo, tr):

tests/test-amend.t

@@ -185,6 +185,7 b' With allowunstable, amend could work in '
   > EOF
 
   $ hg amend
+  1 new orphan changesets
   $ hg log -T '{rev} {node|short} {desc}\n' -G
   @  3 be169c7e8dbe B
   |

tests/test-cache-abuse.t

@@ -70,6 +70,11 b' Beat up tags caches:'
   $ damage "tags --hidden" tags2
   $ damage tags tags2-visible
   $ damage "tag -f t3" hgtagsfnodes1
+  1 new orphan changesets
+  1 new orphan changesets
+  1 new orphan changesets
+  1 new orphan changesets
+  1 new orphan changesets
 
 Beat up branch caches:
 

tests/test-commit-amend.t

@@ -605,6 +605,7 b' Test that rewriting leaving instability '
     babar
   
   $ hg commit --amend
+  1 new orphan changesets
   $ hg log -r 'orphan()'
   changeset:   16:37973c7e0b61
   branch:      a

tests/test-drawdag.t

@@ -206,6 +206,7 b' Create obsmarkers via comments'
   >    \|/
   >     A
   > EOS
+  1 new orphan changesets
 
   $ hg log -r 'sort(all(), topo)' -G --hidden -T '{desc} {node}'
   *  G 711f53bbef0bebd12eb6f0511d5e2e998b984846

tests/test-exchange-obsmarkers-case-A3.t

@@ -74,6 +74,7 b' initial'
   created new head
   $ hg debugobsolete `getid 'desc(A0)'` `getid 'desc(A1)'`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete `getid 'desc(B0)'` `getid 'desc(B1)'`
   obsoleted 1 changesets
   $ hg log -G --hidden
@@ -163,6 +164,7 b' other variant: changeset known in remote'
   created new head
   $ hg debugobsolete `getid 'desc(A0)'` `getid 'desc(A1)'`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete `getid 'desc(B0)'` `getid 'desc(B1)'`
   obsoleted 1 changesets
   $ hg log -G --hidden
@@ -218,6 +220,7 b' test obsmarkers exchange.'
   remote: added 1 changesets with 1 changes to 1 files (+1 heads)
   remote: 1 new obsolescence markers
   remote: obsoleted 1 changesets
+  remote: 1 new orphan changesets
   ## post push state
   # obstore: main
   28b51eb45704506b5c603decd6bf7ac5e0f6a52f e5ea8f9c73143125d36658e90ef70c6d2027a5b7 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
@@ -234,6 +237,7 b' test obsmarkers exchange.'
   added 1 changesets with 1 changes to 1 files (+1 heads)
   1 new obsolescence markers
   obsoleted 1 changesets
+  1 new orphan changesets
   new changesets e5ea8f9c7314
   (run 'hg heads' to see heads, 'hg merge' to merge)
   ## post pull state

tests/test-exchange-obsmarkers-case-A4.t

@@ -65,6 +65,7 b' initial'
   $ hg debugobsolete aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa `getid 'desc(A0)'`
   $ hg debugobsolete `getid 'desc(A0)'` `getid 'desc(A1)'`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg log -G --hidden
   @  e5ea8f9c7314 (draft): A1
   |

tests/test-exchange-obsmarkers-case-B5.t

@@ -71,6 +71,7 b' initial'
   $ mkcommit B1
   $ hg debugobsolete --hidden `getid 'desc(A0)'` `getid 'desc(A1)'`
   obsoleted 1 changesets
+  2 new orphan changesets
   $ hg debugobsolete --hidden aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa `getid 'desc(B0)'`
   $ hg debugobsolete --hidden `getid 'desc(B0)'` `getid 'desc(B1)'`
   obsoleted 1 changesets

tests/test-exchange-obsmarkers-case-C1.t

@@ -58,6 +58,7 b' Initial'
   $ mkcommit A
   $ mkcommit B
   $ hg prune -qd '0 0' '.~1'
+  1 new orphan changesets
   $ hg prune -qd '0 0' .
   $ hg log -G --hidden
   x  f6fbb35d8ac9 (draft): B

tests/test-exchange-obsmarkers-case-C4.t

@@ -67,6 +67,7 b' Implemented as the non-split version'
   $ hg debugobsolete --hidden `getid 'desc(A)'` `getid 'desc(B)'`
   obsoleted 1 changesets
   $ hg debugobsolete --hidden `getid 'desc(A)'` `getid 'desc(C)'`
+  2 new content-divergent changesets
   $ hg prune -qd '0 0' .
   $ hg log -G --hidden
   x  7f7f229b13a6 (draft): C

tests/test-exchange-obsmarkers-case-D1.t

@@ -62,6 +62,7 b' initial'
   created new head
   $ hg debugobsolete `getid 'desc(A0)'` `getid 'desc(A1)'`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg prune -d '0 0' 'desc(B)'
   obsoleted 1 changesets
   $ hg strip --hidden -q 'desc(A0)'

tests/test-exchange-obsmarkers-case-D4.t

@@ -60,6 +60,7 b' initial'
   $ mkcommit B1
   $ hg debugobsolete `getid 'desc(A0)'` aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa `getid 'desc(A1)'`
   $ hg debugobsolete `getid 'desc(B0)'` bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
   obsoleted 1 changesets

tests/test-histedit-obsolete.t

@@ -222,6 +222,7 b' Test that rewriting leaving instability '
   [1]
   $ echo c >> c
   $ hg histedit --continue
+  1 new orphan changesets
 
   $ hg log -r 'orphan()'
   11:c13eb81022ca f (no-eol)

tests/test-obshistory.t

@@ -333,6 +333,7 b' Test setup'
 
   $ hg debugobsolete `getid 'desc(A0)'` `getid 'desc(C0)'`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete `getid 'desc(B0)'` `getid 'desc(C0)'`
   obsoleted 1 changesets
 
@@ -412,6 +413,7 b' Test setup'
   updating to a hidden changeset 471f378eab4c
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg commit --amend -m "A2"
+  2 new content-divergent changesets
   $ hg log --hidden -G
   @  changeset:   3:65b757b745b9
   |  tag:         tip
@@ -498,6 +500,7 b' Test setup'
 
   $ hg debugobsolete `getid 'desc(A0)'` `getid 'desc(C0)'`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete `getid 'desc(B1)'` `getid 'desc(C0)'`
   obsoleted 1 changesets
 

tests/test-obsmarker-template.t

@@ -591,6 +591,7 b' Simulate a fold'
   created new head
   $ hg debugobsolete `getid "desc(A0)"` `getid "desc(C0)"`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete `getid "desc(B0)"` `getid "desc(C0)"`
   obsoleted 1 changesets
 
@@ -817,6 +818,7 b' Test setup'
   updating to a hidden changeset 471f378eab4c
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg commit --amend -m "A2"
+  2 new content-divergent changesets
   $ hg log --hidden -G
   @  changeset:   3:65b757b745b9
   |  tag:         tip
@@ -1112,6 +1114,7 b' Test setup'
   created new head
   $ hg debugobsolete `getid "desc(A0)"` `getid "desc(C0)"`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete `getid "desc(B1)"` `getid "desc(C0)"`
   obsoleted 1 changesets
 
@@ -1589,6 +1592,7 b' Create the cycle'
 
   $ hg debugobsolete `getid "desc(A0)"` `getid "desc(B0)"`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete `getid "desc(B0)"` `getid "desc(C0)"`
   obsoleted 1 changesets
   $ hg debugobsolete `getid "desc(B0)"` `getid "desc(A0)"`
@@ -1874,10 +1878,12 b' Diverge one of the splitted commit'
   $ hg up 6
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg commit --amend -m "Add only B"
+  1 new orphan changesets
 
   $ hg up 6 --hidden
   0 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg commit --amend -m "Add B only"
+  4 new content-divergent changesets
 
   $ hg log -G
   @  changeset:   9:0b997eb7ceee

tests/test-obsolete-bundle-strip.t

@@ -272,6 +272,7 b' setup'
   $ hg debugobsolete a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0 `getid 'desc("C-A0")'`
   $ hg debugobsolete `getid 'desc("C-A0")'` `getid 'desc("C-A1")'`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete --record-parents `getid 'desc("C-B0")'`
   obsoleted 1 changesets
   $ hg up 'desc("ROOT")'
@@ -601,6 +602,7 b' setup'
   $ hg debugobsolete a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0 `getid 'desc("C-A0")'`
   $ hg debugobsolete `getid 'desc("C-A0")'` `getid 'desc("C-A1")'`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete --record-parents `getid 'desc("C-B0")'`
   obsoleted 1 changesets
 
@@ -770,8 +772,10 b' setup'
   $ hg debugobsolete `getid 'desc("C-A")'` `getid 'desc("C-B")'` `getid 'desc("C-C")'` # record split
   obsoleted 1 changesets
   $ hg debugobsolete `getid 'desc("C-A")'` `getid 'desc("C-D")'` # other divergent
+  3 new content-divergent changesets
   $ hg debugobsolete `getid 'desc("C-A")'` b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0
   $ hg debugobsolete b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0 `getid 'desc("C-E")'`
+  1 new content-divergent changesets
   $ hg debugobsolete `getid 'desc("C-B")'` `getid 'desc("C-E")'`
   obsoleted 1 changesets
   $ hg debugobsolete `getid 'desc("C-C")'` `getid 'desc("C-E")'`
@@ -952,6 +956,7 b' Actual testing'
       b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0 2f20ff6509f0e013e90c5c8efd996131c918b0ca 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
       c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0 2f20ff6509f0e013e90c5c8efd996131c918b0ca 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
   # stripping: saved backup bundle to $TESTTMP/split-fold/.hg/strip-backup/2f20ff6509f0-8adeb22d-backup.hg
+  3 new content-divergent changesets
   ### Backup markers ###
       06dc9da25ef03e1ff7864dded5fcba42eff2a3f0 2f20ff6509f0e013e90c5c8efd996131c918b0ca 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
       27ec657ca21dd27c36c99fa75586f72ff0d442f1 2f20ff6509f0e013e90c5c8efd996131c918b0ca 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
@@ -1121,6 +1126,7 b' Bundle multiple revisions'
       b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0 2f20ff6509f0e013e90c5c8efd996131c918b0ca 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
       c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0c0 2f20ff6509f0e013e90c5c8efd996131c918b0ca 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
   # stripping: saved backup bundle to $TESTTMP/split-fold/.hg/strip-backup/9ac430e15fca-36b6476a-backup.hg
+  3 new content-divergent changesets
   ### Backup markers ###
       06dc9da25ef03e1ff7864dded5fcba42eff2a3f0 2f20ff6509f0e013e90c5c8efd996131c918b0ca 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
       27ec657ca21dd27c36c99fa75586f72ff0d442f1 2f20ff6509f0e013e90c5c8efd996131c918b0ca 0 (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}

tests/test-obsolete-changeset-exchange.t

@@ -71,6 +71,7 b' marker to obsolete him)'
   adding manifests
   adding file changes
   added 1 changesets with 0 changes to 1 files (+1 heads)
+  1 new phase-divergent changesets
   new changesets f89bcc95eba5
   (run 'hg heads' to see heads, 'hg merge' to merge)
 

tests/test-obsolete-distributed.t

@@ -276,6 +276,7 b' Bob pulls from Alice and rewrites them'
   $ hg up 'desc("c_A")'
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg commit --amend -m 'c_A1'
+  1 new orphan changesets
   $ hg rebase -r 'desc("c_B0")' -d . # no easy way to rewrite the message with the rebase
   rebasing 2:ef908e42ce65 "c_B0"
   $ hg up
@@ -323,6 +324,7 b' Celeste pulls from Bob and rewrites them'
   $ hg up 'desc("c_A")'
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg commit --amend -m 'c_A2'
+  1 new orphan changesets
   $ hg rebase -r 'desc("c_B1")' -d . # no easy way to rewrite the message with the rebase
   rebasing 2:956063ac4557 "c_B1"
   $ hg up

tests/test-obsolete-divergent.t

@@ -61,6 +61,7 b' A_1 have two direct and divergent succes'
   $ hg debugobsolete `getid A_0` `getid A_1`
   obsoleted 1 changesets
   $ hg debugobsolete `getid A_0` `getid A_2`
+  2 new content-divergent changesets
   $ hg log -G --hidden
   *  3:392fd25390da A_2
   |
@@ -120,6 +121,7 b' indirect divergence with known changeset'
   $ hg debugobsolete `getid A_0` `getid A_1`
   obsoleted 1 changesets
   $ hg debugobsolete `getid A_0` `getid A_2`
+  2 new content-divergent changesets
   $ mkcommit A_3
   created new head
   $ hg debugobsolete `getid A_2` `getid A_3`
@@ -180,6 +182,7 b' indirect divergence with known changeset'
   obsoleted 1 changesets
   $ hg debugobsolete aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa `getid A_1`
   $ hg debugobsolete `getid A_0` `getid A_2`
+  2 new content-divergent changesets
   $ hg log -G --hidden
   *  3:392fd25390da A_2
   |
@@ -250,6 +253,7 b' divergence that converge again is not di'
   $ hg debugobsolete `getid A_0` `getid A_1`
   obsoleted 1 changesets
   $ hg debugobsolete `getid A_0` `getid A_2`
+  2 new content-divergent changesets
   $ mkcommit A_3
   created new head
   $ hg debugobsolete `getid A_1` `getid A_3`
@@ -430,6 +434,7 b' Check more complex obsolescence graft (w'
   created new head
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ hg debugobsolete `getid A_5` `getid A_9`
+  4 new content-divergent changesets
   $ hg log -G --hidden
   *  10:bed64f5d2f5a A_9
   |
@@ -670,6 +675,7 b' Use scmutil.cleanupnodes API to create d'
 
   $ rm .hg/localtags
   $ hg cleanup --config extensions.t=$TESTTMP/scmutilcleanup.py
+  2 new content-divergent changesets
   $ hg log -G -T '{rev}:{node|short} {desc} {instabilities}' -r 'sort(all(), topo)'
   @  5:1a2a9b5b0030 B2 content-divergent
   |

tests/test-obsolete.t

@@ -208,6 +208,7 b' check that various commands work well wi'
 Check that public changeset are not accounted as obsolete:
 
   $ hg --hidden phase --public 2
+  1 new phase-divergent changesets
   $ hg log -G
   @  5:5601fb93a350 (draft phase-divergent) [tip ] add new_3_c
   |
@@ -519,6 +520,7 b' detect outgoing obsolete and unstable'
   $ mkcommit original_e
   $ hg debugobsolete --record-parents `getid original_d` -d '0 0'
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete | grep `getid original_d`
   94b33453f93bdb8d457ef9b770851a618bf413e1 0 {6f96419950729f3671185b847352890f074f7557} (Thu Jan 01 00:00:00 1970 +0000) {'user': 'test'}
   $ hg log -r 'obsolete()'
@@ -583,6 +585,7 b" Don't try to push extinct changeset"
   adding file changes
   added 6 changesets with 6 changes to 6 files (+1 heads)
   7 new obsolescence markers
+  1 new orphan changesets
 
 no warning displayed
 
@@ -918,7 +921,9 b' Several troubles on the same changeset ('
 
   $ hg debugobsolete `getid obsolete_e`
   obsoleted 1 changesets
+  2 new orphan changesets
   $ hg debugobsolete `getid original_c` `getid babar`
+  1 new phase-divergent changesets
   $ hg log --config ui.logtemplate= -r 'phasedivergent() and orphan()'
   changeset:   7:50c51b361e60
   user:        test
@@ -1293,6 +1298,7 b' Test heads computation on pending index '
   0 files updated, 0 files merged, 1 files removed, 0 files unresolved
   $ echo aa > a
   $ hg amendtransient
+  1 new orphan changesets
   [1, 2]
 
 Test cache consistency for the visible filter

tests/test-push-checkheads-partial-C2.t

@@ -61,6 +61,7 b' Test setup'
   created new head
   $ hg debugobsolete `getid "desc(A0)" ` `getid "desc(A1)"`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg log -G --hidden
   @  f6082bc4ffef (draft): A1
   |

tests/test-push-checkheads-partial-C4.t

@@ -61,6 +61,7 b' Test setup'
   created new head
   $ hg debugobsolete --record-parents `getid "desc(A0)"`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg log -G --hidden
   @  0f88766e02d6 (draft): C0
   |

tests/test-push-checkheads-pruned-B2.t

@@ -61,6 +61,7 b' Test setup'
   created new head
   $ hg debugobsolete `getid "desc(A0)" ` `getid "desc(A1)"`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete --record-parents `getid "desc(B0)"`
   obsoleted 1 changesets
   $ hg log -G --hidden

tests/test-push-checkheads-pruned-B3.t

@@ -61,6 +61,7 b' Test setup'
   created new head
   $ hg debugobsolete --record-parents `getid "desc(A0)"`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete `getid "desc(B0)" ` `getid "desc(B1)"`
   obsoleted 1 changesets
   $ hg log -G --hidden

tests/test-push-checkheads-pruned-B4.t

@@ -62,6 +62,7 b' Test setup'
   created new head
   $ hg debugobsolete --record-parents `getid "desc(A0)"`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete --record-parents `getid "desc(B0)"`
   obsoleted 1 changesets
   $ hg log -G --hidden

tests/test-push-checkheads-pruned-B5.t

@@ -65,6 +65,7 b' Test setup'
   created new head
   $ hg debugobsolete --record-parents `getid "desc(A0)"`
   obsoleted 1 changesets
+  2 new orphan changesets
   $ hg debugobsolete `getid "desc(B0)"` `getid "desc(B1)"`
   obsoleted 1 changesets
   $ hg debugobsolete --record-parents `getid "desc(C0)"`

tests/test-push-checkheads-pruned-B8.t

@@ -68,6 +68,7 b' Test setup'
   created new head
   $ hg debugobsolete `getid "desc(A0)" ` `getid "desc(A1)"`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete `getid "desc(B0)" ` `getid "desc(B1)"`
   obsoleted 1 changesets
   $ hg debugobsolete --record-parents `getid "desc(B1)"`

tests/test-push-checkheads-superceed-A2.t

@@ -61,6 +61,7 b' Test setup'
   $ mkcommit B1
   $ hg debugobsolete `getid "desc(A0)" ` `getid "desc(A1)"`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete `getid "desc(B0)" ` `getid "desc(B1)"`
   obsoleted 1 changesets
   $ hg log -G --hidden

tests/test-push-checkheads-superceed-A3.t

@@ -64,6 +64,7 b' Test setup'
   $ mkcommit A1
   $ hg debugobsolete `getid "desc(A0)" ` `getid "desc(A1)"`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete `getid "desc(B0)" ` `getid "desc(B1)"`
   obsoleted 1 changesets
   $ hg log -G --hidden

tests/test-push-checkheads-superceed-A6.t

@@ -70,6 +70,7 b' Test setup'
   $ mkcommit B1
   $ hg debugobsolete `getid "desc(A0)" ` `getid "desc(A1)"`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete `getid "desc(B0)" ` `getid "desc(B1)"`
   obsoleted 1 changesets
   $ hg log -G --hidden

tests/test-push-checkheads-superceed-A7.t

@@ -70,6 +70,7 b' Test setup'
   created new head
   $ hg debugobsolete `getid "desc(A0)" ` `getid "desc(A1)"`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete `getid "desc(B0)" ` `getid "desc(B1)"`
   obsoleted 1 changesets
   $ hg log -G --hidden

tests/test-push-checkheads-unpushed-D2.t

@@ -65,6 +65,7 b' Test setup'
   created new head
   $ hg debugobsolete `getid "desc(A0)" ` `getid "desc(A1)"`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete --record-parents `getid "desc(B0)"`
   obsoleted 1 changesets
   $ hg up 0

tests/test-push-checkheads-unpushed-D3.t

@@ -68,6 +68,7 b' Test setup'
   created new head
   $ hg debugobsolete `getid "desc(A0)" ` `getid "desc(A1)"`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete `getid "desc(B0)" ` `getid "desc(B1)"`
   obsoleted 1 changesets
   $ hg log -G --hidden

tests/test-push-checkheads-unpushed-D4.t

@@ -84,6 +84,7 b' Test setup'
   $ mkcommit B1
   $ hg debugobsolete `getid "desc(A0)" ` `getid "desc(A1)"`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete `getid "desc(B0)" ` `getid "desc(B1)"`
   obsoleted 1 changesets
   $ hg log -G --hidden

tests/test-push-checkheads-unpushed-D5.t

@@ -73,6 +73,7 b' Test setup'
   created new head
   $ hg debugobsolete `getid "desc(A0)" ` `getid "desc(A1)"`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg debugobsolete `getid "desc(B0)" ` `getid "desc(B1)"`
   obsoleted 1 changesets
   $ hg log -G --hidden
@@ -107,5 +108,6 b' Actual testing'
   added 1 changesets with 1 changes to 1 files
   1 new obsolescence markers
   obsoleted 1 changesets
+  1 new orphan changesets
 
   $ cd ../..

tests/test-push-race.t

@@ -1707,6 +1707,7 b' racing commit push a new head obsoleting'
   added 1 changesets with 1 changes to 1 files (+1 heads)
   1 new obsolescence markers
   obsoleted 1 changesets
+  1 new orphan changesets
   new changesets 720c5163ecf6
   (run 'hg heads .' to see heads, 'hg merge' to merge)
   $ hg -R ./client-other pull
@@ -1718,6 +1719,7 b' racing commit push a new head obsoleting'
   added 1 changesets with 1 changes to 1 files (+1 heads)
   1 new obsolescence markers
   obsoleted 1 changesets
+  1 new orphan changesets
   new changesets 720c5163ecf6
   (run 'hg heads .' to see heads, 'hg merge' to merge)
   $ hg -R ./client-racy pull
@@ -1727,6 +1729,7 b' racing commit push a new head obsoleting'
   adding manifests
   adding file changes
   added 1 changesets with 0 changes to 0 files
+  1 new orphan changesets
   new changesets a98a47d8b85b
   (run 'hg update' to get a working copy)
 
@@ -1792,6 +1795,7 b' Creating changesets and markers'
   $ hg -R client-other/ branch --force default
   marked working directory as branch default
   $ hg -R client-other/ commit -m "C-W"
+  1 new orphan changesets
   created new head
   $ ID_V=`hg -R client-other log -T '{node}\n' -r 'desc("C-V")'`
   $ ID_W=`hg -R client-other log -T '{node}\n' -r 'desc("C-W")'`
@@ -1818,6 +1822,7 b' Pushing'
   remote: added 1 changesets with 0 changes to 1 files (+1 heads)
   remote: 1 new obsolescence markers
   remote: obsoleted 1 changesets
+  remote: 1 new orphan changesets
 
   $ release $TESTTMP/watchfile
 

tests/test-rebase-dest.t

@@ -420,6 +420,7 b' Resolve instability:'
   >     \|          # amend: I -> I2
   >      A
   > EOF
+  6 new orphan changesets
   rebasing 16:5c432343bf59 "J" (J tip)
   rebasing 3:26805aba1e60 "C" (C)
   rebasing 6:f585351a92f8 "D" (D)

tests/test-rebase-obsolete.t

@@ -182,6 +182,7 b' More complex case where part of the reba'
 
   $ hg rebase --rev 'desc(D)' --dest 'desc(H)'
   rebasing 9:08483444fef9 "D"
+  1 new orphan changesets
   $ hg debugobsolete
   42ccdea3bb16d28e1848c95fe2e44c000f3f21b1 0 {cd010b8cd998f3981a5a8115f94f8da4ab506089} (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '0', 'operation': 'rebase', 'user': 'test'}
   5fddd98957c8a54a4d436dfe1da9d87f21a1b97b 5ae4c968c6aca831df823664e706c9d4aa34473d 0 (Thu Jan 01 00:00:00 1970 +0000) {'ef1': '4', 'operation': 'rebase', 'user': 'test'}
@@ -460,6 +461,7 b' Test that rewriting leaving instability '
   9:cf44d2f5a9f4 D (no-eol)
   $ hg rebase -r 8
   rebasing 8:e273c5e7d2d2 "C"
+  1 new orphan changesets
   $ hg log -G
   o  11:0d8f238b634c C
   |
@@ -582,6 +584,7 b' test on rebase dropping a merge'
   rebasing 3:32af7686d403 "D"
   rebasing 7:02de42196ebe "H"
   rebasing 9:4bde274eefcf "I" (tip)
+  1 new orphan changesets
   $ hg log -G
   @  12:acd174b7ab39 I
   |
@@ -616,12 +619,14 b' Test hidden changesets in the rebase set'
   $ echo J > J
   $ hg add J
   $ hg commit -m J
+  1 new orphan changesets
   $ hg debugobsolete `hg log --rev . -T '{node}'`
   obsoleted 1 changesets
 
   $ hg rebase --rev .~1::. --dest 'max(desc(D))' --traceback --config experimental.rebaseskipobsolete=off
   rebasing 9:4bde274eefcf "I"
   rebasing 13:06edfc82198f "J" (tip)
+  2 new content-divergent changesets
   $ hg log -G
   @  15:5ae8a643467b J
   |
@@ -656,6 +661,7 b' Test hidden changesets in the rebase set'
   $ echo "K" > K
   $ hg add K
   $ hg commit --amend -m "K"
+  1 new orphan changesets
   $ echo "L" > L
   $ hg add L
   $ hg commit -m "L"
@@ -664,6 +670,7 b' Test hidden changesets in the rebase set'
   $ echo "M" > M
   $ hg add M
   $ hg commit --amend -m "M"
+  1 new orphan changesets
   $ hg log -G
   @  18:bfaedf8eb73b M
   |
@@ -702,6 +709,7 b' Test hidden changesets in the rebase set'
   $ hg rebase -s 14 -d 17 --config experimental.rebaseskipobsolete=True
   note: not rebasing 14:9ad579b4a5de "I", already in destination as 16:fc37a630c901 "K"
   rebasing 15:5ae8a643467b "J"
+  1 new orphan changesets
 
   $ cd ..
 
@@ -732,6 +740,7 b' setup'
   $ echo C > C
   $ hg add C
   $ hg commit -m C
+  1 new orphan changesets
   $ hg log -G
   @  4:212cb178bcbb C
   |
@@ -756,6 +765,7 b' Even when the chain include missing node'
   $ echo D > D
   $ hg add D
   $ hg commit -m D
+  1 new orphan changesets
   $ hg --hidden strip -r 'desc(B1)'
   saved backup bundle to $TESTTMP/obsskip/.hg/strip-backup/86f6414ccda7-b1c452ee-backup.hg
   $ hg log -G
@@ -796,6 +806,7 b' Even when the chain include missing node'
   
   $ hg debugobsolete `hg log -r 7 -T '{node}\n'` --config experimental.evolution=true
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg rebase -d 6 -r "4::"
   rebasing 4:ff2c4d47b71d "C"
   note: not rebasing 7:360bbaa7d3ce "O", it has no successor
@@ -871,6 +882,7 b' If a rebase is going to create divergenc'
   $ echo "bar" > foo
   $ hg add foo
   $ hg commit -m "bar foo"
+  1 new orphan changesets
   $ hg log -G
   @  14:73568ab6879d bar foo
   |
@@ -922,6 +934,7 b' With experimental.evolution.allowdiverge'
   $ hg rebase -s 10 -d 12 --config experimental.evolution.allowdivergence=True
   rebasing 10:121d9e3bc4c6 "P"
   rebasing 14:73568ab6879d "bar foo" (tip)
+  2 new content-divergent changesets
   $ hg summary
   parent: 16:61bd55f69bc4 tip
    bar foo
@@ -961,6 +974,7 b' Create the changes that we will rebase'
   $ hg commit -m "dummy change"
   $ hg debugobsolete `hg log -r ".^" -T '{node}'` `hg log -r 18 -T '{node}'` --config experimental.evolution=true
   obsoleted 1 changesets
+  1 new orphan changesets
 
   $ hg log -G -r 16::
   @  21:7bdc8a87673d dummy change
@@ -1020,6 +1034,7 b' obsolete changeset which successor is in'
   >    \|
   >     a
   > EOF
+  1 new orphan changesets
   $ hg log -G -r 'a'::
   *  7:1143e9adc121 f
   |
@@ -1087,6 +1102,8 b' By allowing divergence, we can perform t'
   rebasing 3:a82ac2b38757 "c" (c)
   rebasing 4:76be324c128b "d" (d)
   rebasing 7:1143e9adc121 "f" (f tip)
+  1 new orphan changesets
+  2 new content-divergent changesets
   $ hg log -G -r 'a':: -T instabilities
   o  10:e1744ea07510 f
   |
@@ -1118,6 +1135,8 b' By allowing divergence, we can perform t'
   rebasing 3:a82ac2b38757 "c" (c)
   rebasing 4:76be324c128b "d" (d)
   rebasing 7:1143e9adc121 "f" (f tip)
+  1 new orphan changesets
+  2 new content-divergent changesets
 
   $ hg strip -r 0:
 
@@ -1136,6 +1155,7 b' Similar test on a more complex graph'
   >    \|
   >     a
   > EOF
+  1 new orphan changesets
   $ hg log -G -r 'a':
   *  8:2876ce66c6eb g
   |
@@ -1206,6 +1226,7 b' Rebase merge where successor of one pare'
   >  \|/
   >   A
   > EOF
+  1 new orphan changesets
 
   $ hg rebase -d B -s D
   note: not rebasing 2:b18e25de2cf5 "D" (D), already in destination as 1:112478962961 "B" (B)
@@ -1237,6 +1258,7 b' Rebase merge where successor of other pa'
   >  \|/
   >   A
   > EOF
+  1 new orphan changesets
 
   $ hg rebase -d B -s E
   note: not rebasing 3:7fb047a69f22 "E" (E), already in destination as 1:112478962961 "B" (B)
@@ -1268,6 +1290,7 b' Rebase merge where successor of one pare'
   >  \|/
   >   A
   > EOF
+  1 new orphan changesets
 
   $ hg rebase -d C -s D
   note: not rebasing 2:b18e25de2cf5 "D" (D), already in destination as 1:112478962961 "B" (B)
@@ -1302,6 +1325,7 b' Rebase merge where successor of other pa'
   >  \|/
   >   A
   > EOF
+  1 new orphan changesets
 
   $ hg rebase -d C -s E
   note: not rebasing 3:7fb047a69f22 "E" (E), already in destination as 1:112478962961 "B" (B)
@@ -1335,6 +1359,7 b' Rebase merge where successor of one pare'
   >  \|/
   >   A
   > EOF
+  1 new orphan changesets
 
   $ hg rebase -d C -b F
   rebasing 2:b18e25de2cf5 "D" (D)
@@ -1370,6 +1395,7 b' Rebase merge where successor of other pa'
   >  \|/
   >   A
   > EOF
+  1 new orphan changesets
 
   $ hg rebase -d C -b F
   note: not rebasing 2:b18e25de2cf5 "D" (D), already in destination as 1:112478962961 "B" (B)
@@ -1405,6 +1431,7 b' Rebase merge where both parents have suc'
   > | |
   > X Y
   > EOS
+  1 new orphan changesets
   $ hg rebase -r A+B+E -d F
   note: not rebasing 4:a3d17304151f "A" (A), already in destination as 0:96cc3511f894 "C" (C)
   note: not rebasing 5:b23a2cc00842 "B" (B), already in destination as 1:058c1e1fb10a "D" (D)
@@ -1423,6 +1450,7 b' parent moves as requested.'
   >  /| | # replace: A -> C
   > A B C # D/D = D
   > EOS
+  1 new orphan changesets
   $ hg rebase -r A+B+D -d Z
   note: not rebasing 0:426bada5c675 "A" (A), already in destination as 2:96cc3511f894 "C" (C)
   rebasing 1:fc2b737bb2e5 "B" (B)
@@ -1453,6 +1481,7 b' parent moves as requested.'
   >  /| |  # replace: B -> C
   > A B C  # D/D = D
   > EOS
+  1 new orphan changesets
   $ hg rebase -r B+A+D -d Z
   rebasing 0:426bada5c675 "A" (A)
   note: not rebasing 1:fc2b737bb2e5 "B" (B), already in destination as 2:96cc3511f894 "C" (C)
@@ -1530,6 +1559,7 b' parent gets moved:'
   $ hg rebase -r B+D1 -d E
   rebasing 1:112478962961 "B" (B)
   note: not rebasing 5:15ecf15e0114 "D1" (book D1 tip), already in destination as 2:0807738e0be9 "D2" (D2)
+  1 new orphan changesets
   $ hg log -G -T '{desc} {bookmarks}'
   @  B book
   |
@@ -1561,6 +1591,7 b' Rebasing a merge with one of its parent '
   >  |/
   >  A
   > EOS
+  1 new orphan changesets
 
   $ eval `hg tags -T '{tag}={node}\n'`
   $ rm .hg/localtags

tests/test-revset2.t

@@ -1636,6 +1636,8 b' Test obsstore related revsets'
   >  \|/   |     # amend: F -> G
   >   A    A  Z  # amend: A -> Z
   > EOS
+  3 new orphan changesets
+  3 new content-divergent changesets
 
   $ hg log -r 'successors(Z)' -T '{desc}\n'
   Z

tests/test-show-work.t

@@ -242,6 +242,7 b' Obsolescence information appears in labe'
   > EOF
   $ hg debugobsolete `hg log -r 'desc("commit 2")' -T "{node}"`
   obsoleted 1 changesets
+  1 new orphan changesets
   $ hg show work --color=debug
   @  [log.changeset changeset.draft changeset.unstable instability.orphan|32f3] [log.description|commit 3]
   x  [log.changeset changeset.draft changeset.obsolete|6a75] [log.description|commit 2]

tests/test-split.t

@@ -417,6 +417,7 b' Split a non-head without rebase'
   [255]
 #else
   $ runsplit -r 1 --no-rebase >/dev/null
+  3 new orphan changesets
   $ hg bookmark
      d1                        2:b5c5ea414030
    * d2                        3:f4a0a8d004cc
@@ -459,6 +460,7 b' Split a non-head with obsoleted descenda'
   >     |
   >     A
   > EOS
+  2 new orphan changesets
   $ eval `hg tags -T '{tag}={node}\n'`
   $ rm .hg/localtags
   $ hg split $B --config experimental.evolution=createmarkers

tests/test-strip.t

@@ -1285,6 +1285,7 b' we have reusable code here'
   > EOF
 
   $ hg testnodescleanup --config extensions.t=$TESTTMP/scmutilcleanup.py
+  4 new orphan changesets
 
   $ rm .hg/localtags
   $ hg log -G -T '{rev}:{node|short} {desc} {bookmarks}' -r 'sort(all(), topo)'

tests/test-unamend.t

@@ -258,6 +258,7 b' Unamending in middle of a stack'
   2 files updated, 0 files merged, 2 files removed, 0 files unresolved
   $ echo bar >> f
   $ hg amend
+  3 new orphan changesets
   $ hg rebase -s 6 -d . -q
 
   $ hg glog
@@ -285,12 +286,14 b' Unamending in middle of a stack'
   [255]
 
   $ hg unamend
+  3 new orphan changesets
 
 Trying to unamend a public changeset
 
   $ hg up -C 23
   5 files updated, 0 files merged, 0 files removed, 0 files unresolved
   $ hg phase -r . -p
+  1 new phase-divergent changesets
   $ hg unamend
   abort: cannot unamend public changesets
   (see 'hg help phases' for details)

tests/test-uncommit.t

@@ -190,6 +190,7 b' Uncommit in the middle of a stack, does '
   $ hg bookmark
      foo                       9:48e5bd7cd583
   $ hg uncommit
+  3 new orphan changesets
   $ hg status
   M files
   A file-abc
@@ -220,6 +221,7 b' Partial uncommit in the middle, does not'
   $ hg bookmark
      foo                       9:48e5bd7cd583
   $ hg uncommit file-ab
+  1 new orphan changesets
   $ hg status
   A file-ab