view tests/test-evolve-order.t @ 6935:954d7ea5cd67 stable

stack: when stack base is obsolete, pick any successor, even if at random

There are situations when s0 is obsolete and we also cannot pick just one
successor for it to use in stack. In such a case, let's pick the "latest"
successor from the first set.

We're assuming that obsutil.successorssets() returns data in the same order (it
should, since it makes sure to sort data internally). Keeping that in mind,
while the successor picked for s0 by this code is not based on any sort of
sophisticated logic, it should nonetheless be the same every time.

This patch is probably not going to completely break anything that was
previously working fine, because the previous behavior was to just abort with
an exception.

evolve --rev reordering
-----------------------

  $ cat >> $HGRCPATH <<EOF
  > [ui]
  > logtemplate = {rev}:{node|short}@{branch}({phase}) {desc|firstline}\n
  > [experimental]
  > evolution.allowdivergence = True
  > [extensions]
  > EOF
  $ echo "evolve=$(echo $(dirname $TESTDIR))/hgext3rd/evolve/" >> $HGRCPATH
  $ mkcommit() {
  >    echo "$1" > "$1"
  >    hg add "$1"
  >    hg ci -m "add $1"
  > }

  $ mkstack() {
  >    # Creates a stack of commit based on $1 with messages from $2, $3 ..
  >    hg update "$1" -C
  >    shift
  >    mkcommits $*
  > }

  $ mkcommits() {
  >   for i in $@; do mkcommit $i ; done
  > }

Initial setup
  $ hg init testrevorder
  $ cd testrevorder
  $ mkcommits p _a _b _c
  $ hg phase --public 0
  $ hg up 'desc(_a)'
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ echo "aaa" > _a
  $ hg amend
  2 new orphan changesets
  $ hg log -G
  @  4:12d519679175@default(draft) add _a
  |
  | *  3:4d156641b718@default(draft) add _c
  | |
  | *  2:4d7242ebb004@default(draft) add _b
  | |
  | x  1:2d73fcd7f07d@default(draft) add _a
  |/
  o  0:f92638be10c7@default(public) add p
  

evolve --rev reorders the rev to solve instability, trivial case 2 revs wrong order
  $ hg evolve --rev 'desc(_c) + desc(_b)'
  move:[2] add _b
  atop:[4] add _a
  move:[3] add _c

evolve --rev reorders the rev to solve instability. Harder case, obsolescence
accross three stacks in growing rev numbers.
  $ hg up "desc(_c)"
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ mkcommit _d
  $ hg up "desc(_a)"
  0 files updated, 0 files merged, 3 files removed, 0 files unresolved
  $ hg amend -m "aprime"
  3 new orphan changesets
  $ hg evolve --rev "desc(_b)"
  move:[5] add _b
  atop:[8] aprime
  $ hg up "desc(_b) - obsolete()"
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg amend -m "bprime"
  $ hg up "desc(aprime)"
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg amend -m "asecond"
  1 new orphan changesets
  $ hg log -G
  @  11:9a584314f3f3@default(draft) asecond
  |
  | *  10:a59c79776f7c@default(draft) bprime
  | |
  | x  8:81a687b96d4d@default(draft) aprime
  |/
  | *  7:464731bc0ed0@default(draft) add _d
  | |
  | *  6:52b8f9b04f83@default(draft) add _c
  | |
  | x  5:59476c3836ef@default(draft) add _b
  | |
  | x  4:12d519679175@default(draft) add _a
  |/
  o  0:f92638be10c7@default(public) add p
  
  $ hg evolve --rev "orphan()" --update
  move:[10] bprime
  atop:[11] asecond
  move:[6] add _c
  move:[7] add _d
  working directory is now at 225d2cc5d3fc
  $ hg log -G
  @  14:225d2cc5d3fc@default(draft) add _d
  |
  o  13:0fc229278e4d@default(draft) add _c
  |
  o  12:c3741b9eafae@default(draft) bprime
  |
  o  11:9a584314f3f3@default(draft) asecond
  |
  o  0:f92638be10c7@default(public) add p
  

Evolve --rev more complex case: two sets of stacks one with prune an no successor, the other one
partially solvable
 
First set of stack:
  $ mkstack "desc(_d)" c1_ c2_ c3_ c4_ >/dev/null
  $ mkstack "desc(_d)" c1prime c2prime >/dev/null
  $ mkstack "desc(_d)" c1second >/dev/null
  $ hg prune "desc(c1_)" -s "desc(c1prime)"
  1 changesets pruned
  3 new orphan changesets
  $ hg prune "desc(c2_)" -s "desc(c2prime)"
  1 changesets pruned
  $ hg prune "desc(c1prime)" -s "desc(c1second)"
  1 changesets pruned
  1 new orphan changesets
  $ hg log -G -r "desc(_d)::"
  @  21:a329855d0bc1@default(draft) add c1second
  |
  | *  20:072276ece1bf@default(draft) add c2prime
  | |
  | x  19:f137acd06692@default(draft) add c1prime
  |/
  | *  18:0a1d9b2ce733@default(draft) add c4_
  | |
  | *  17:e2874f41c56c@default(draft) add c3_
  | |
  | x  16:3247c33339fa@default(draft) add c2_
  | |
  | x  15:df322257c182@default(draft) add c1_
  |/
  o  14:225d2cc5d3fc@default(draft) add _d
  |
  ~

Second set of stack with no successor for b2_:
  $ mkstack "desc(_d)" b1_ b2_ b3_ b4_ >/dev/null
  $ mkstack "desc(_d)" b1prime b3prime >/dev/null
  $ hg prune "desc(b1_)" -s "desc(b1prime)"
  1 changesets pruned
  3 new orphan changesets
  $ hg prune "desc(b3_)" -s "desc(b3prime)"
  1 changesets pruned
  $ hg prune "desc(b2_)"
  1 changesets pruned

  $ hg log -G -r "desc(_d)::"
  @  27:ba4c348b6d5e@default(draft) add b3prime
  |
  o  26:8fe985f5d0aa@default(draft) add b1prime
  |
  | *  25:1d9ba2e75c93@default(draft) add b4_
  | |
  | x  24:aec6a9657b6c@default(draft) add b3_
  | |
  | x  23:a69b58575918@default(draft) add b2_
  | |
  | x  22:3564eb18e448@default(draft) add b1_
  |/
  | o  21:a329855d0bc1@default(draft) add c1second
  |/
  | *  20:072276ece1bf@default(draft) add c2prime
  | |
  | x  19:f137acd06692@default(draft) add c1prime
  |/
  | *  18:0a1d9b2ce733@default(draft) add c4_
  | |
  | *  17:e2874f41c56c@default(draft) add c3_
  | |
  | x  16:3247c33339fa@default(draft) add c2_
  | |
  | x  15:df322257c182@default(draft) add c1_
  |/
  o  14:225d2cc5d3fc@default(draft) add _d
  |
  ~

Solve the full second stack and only part of the first one
  $ echo "(desc(_d)::) - desc(c3_)"
  (desc(_d)::) - desc(c3_)
  $ hg evolve --rev "(desc(_d)::) - desc(c3_)"
  skipping 0a1d9b2ce733, consider including orphan ancestors
  move:[20] add c2prime
  atop:[21] add c1second
  move:[25] add b4_
  atop:[27] add b3prime

Cleanup
  $ hg evolve --rev "(desc(_d)::)" --update
  move:[17] add c3_
  atop:[28] add c2prime
  move:[18] add c4_
  working directory is now at 4ee8feb52325
  $ hg log -G -r "desc(_d)::"
  @  31:4ee8feb52325@default(draft) add c4_
  |
  o  30:08a530ce67e1@default(draft) add c3_
  |
  | o  29:4897c8ed7645@default(draft) add b4_
  | |
  o |  28:3abc7618dd5f@default(draft) add c2prime
  | |
  | o  27:ba4c348b6d5e@default(draft) add b3prime
  | |
  | o  26:8fe985f5d0aa@default(draft) add b1prime
  | |
  o |  21:a329855d0bc1@default(draft) add c1second
  |/
  o  14:225d2cc5d3fc@default(draft) add _d
  |
  ~

Test multiple revision with some un-evolvable because parent is split
---------------------------------------------------------------------

  $ hg up 'desc(c2prime)'
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ mkcommit c3part1
  created new head
  $ hg prev
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  [28] add c2prime
  $ mkcommit c3part2
  created new head
  $ hg prune -s 'desc(c3part1)' 'desc(c3_)'
  1 changesets pruned
  1 new orphan changesets
  $ hg prune -s 'desc(c3part2)' 'desc(c3_)'
  1 changesets pruned
  2 new content-divergent changesets
  $ hg up 'desc(b3prime)'
  2 files updated, 0 files merged, 3 files removed, 0 files unresolved
  $ hg amend -m 'b3second'
  1 new orphan changesets
  $ hg evolve --rev "orphan()"
  move:[29] add b4_
  atop:[34] b3second
  skipping 08a530ce67e1: divergent rewriting. can't choose destination