tests/test-push-warn.t

discovery: add new set-based discovery

Adds a new discovery method based on repeatedly sampling the still
undecided subset of the local node graph to determine the set of nodes
common to both the client and the server.

For small differences between client and server, it uses about the same
or slightly fewer roundtrips than the old tree-based discovery. For
larger differences, it typically reduces the number of roundtrips
drastically (from 150 to 4, for instance).

The old discovery code now lives in treediscovery.py, the new code is
in setdiscovery.py.

Still missing is a hook for extensions to contribute nodes to the
initial sample. For instance, Augie's remotebranches could contribute
the last known state of the server's heads.

Credits for the actual sampler and computing common heads instead of
bases go to Benoit Boissinot.

  $ echo "[extensions]" >> $HGRCPATH
  $ echo "graphlog=" >> $HGRCPATH

  $ hg init a
  $ cd a
  $ echo foo > t1
  $ hg add t1
  $ hg commit -m "1"

  $ cd ..
  $ hg clone a b
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ cd a
  $ echo foo > t2
  $ hg add t2
  $ hg commit -m "2"

  $ cd ../b
  $ echo foo > t3
  $ hg add t3
  $ hg commit -m "3"

  $ hg push ../a
  pushing to ../a
  searching for changes
  abort: push creates new remote heads on branch 'default'!
  (you should pull and merge or use push -f to force)
  [255]

  $ hg push --debug ../a
  pushing to ../a
  query 1; heads
  searching for changes
  taking quick initial sample
  searching: 2 queries
  query 2; still undecided: 2, sample size is: 2
  2 total queries
  new remote heads on branch 'default'
  new remote head 1e108cc5548c
  abort: push creates new remote heads on branch 'default'!
  (you should pull and merge or use push -f to force)
  [255]

  $ hg pull ../a
  pulling from ../a
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  (run 'hg heads' to see heads, 'hg merge' to merge)

  $ hg push ../a
  pushing to ../a
  searching for changes
  abort: push creates new remote heads on branch 'default'!
  (did you forget to merge? use push -f to force)
  [255]

  $ hg merge
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)

  $ hg commit -m "4"
  $ hg push ../a
  pushing to ../a
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 1 changes to 1 files

  $ cd ..

  $ hg init c
  $ cd c
  $ for i in 0 1 2; do
  >     echo $i >> foo
  >     hg ci -Am $i
  > done
  adding foo
  $ cd ..

  $ hg clone c d
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ cd d
  $ for i in 0 1; do
  >    hg co -C $i
  >    echo d-$i >> foo
  >    hg ci -m d-$i
  > done
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  created new head
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  created new head

  $ HGMERGE=true hg merge 3
  merging foo
  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)

  $ hg ci -m c-d

  $ hg push ../c
  pushing to ../c
  searching for changes
  abort: push creates new remote heads on branch 'default'!
  (did you forget to merge? use push -f to force)
  [255]

  $ hg push -r 2 ../c
  pushing to ../c
  searching for changes
  no changes found

  $ hg push -r 3 ../c
  pushing to ../c
  searching for changes
  abort: push creates new remote heads on branch 'default'!
  (did you forget to merge? use push -f to force)
  [255]

  $ hg push -r 3 -r 4 ../c
  pushing to ../c
  searching for changes
  abort: push creates new remote heads on branch 'default'!
  (did you forget to merge? use push -f to force)
  [255]

  $ hg push -f -r 3 -r 4 ../c
  pushing to ../c
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 1 files (+2 heads)

  $ hg push -r 5 ../c
  pushing to ../c
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (-1 heads)

  $ hg in ../c
  comparing with ../c
  searching for changes
  no changes found
  [1]


Issue450: push -r warns about remote head creation even if no heads
will be created

  $ hg init ../e
  $ hg push -r 0 ../e
  pushing to ../e
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files

  $ hg push -r 1 ../e
  pushing to ../e
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files

  $ cd ..


Issue736: named branches are not considered for detection of
unmerged heads in "hg push"

  $ hg init f
  $ cd f
  $ hg -q branch a
  $ echo 0 > foo
  $ hg -q ci -Am 0
  $ echo 1 > foo
  $ hg -q ci -m 1
  $ hg -q up 0
  $ echo 2 > foo
  $ hg -q ci -m 2
  $ hg -q up 0
  $ hg -q branch b
  $ echo 3 > foo
  $ hg -q ci -m 3
  $ cd ..

  $ hg -q clone f g
  $ cd g

Push on existing branch and new branch:

  $ hg -q up 1
  $ echo 4 > foo
  $ hg -q ci -m 4
  $ hg -q up 0
  $ echo 5 > foo
  $ hg -q branch c
  $ hg -q ci -m 5

  $ hg push ../f
  pushing to ../f
  searching for changes
  abort: push creates new remote branches: c!
  (use 'hg push --new-branch' to create new remote branches)
  [255]

  $ hg push -r 4 -r 5 ../f
  pushing to ../f
  searching for changes
  abort: push creates new remote branches: c!
  (use 'hg push --new-branch' to create new remote branches)
  [255]


Multiple new branches:

  $ hg -q branch d
  $ echo 6 > foo
  $ hg -q ci -m 6

  $ hg push ../f
  pushing to ../f
  searching for changes
  abort: push creates new remote branches: c, d!
  (use 'hg push --new-branch' to create new remote branches)
  [255]

  $ hg push -r 4 -r 6 ../f
  pushing to ../f
  searching for changes
  abort: push creates new remote branches: c, d!
  (use 'hg push --new-branch' to create new remote branches)
  [255]

  $ cd ../g


Fail on multiple head push:

  $ hg -q up 1
  $ echo 7 > foo
  $ hg -q ci -m 7

  $ hg push -r 4 -r 7 ../f
  pushing to ../f
  searching for changes
  abort: push creates new remote heads on branch 'a'!
  (did you forget to merge? use push -f to force)
  [255]

Push replacement head on existing branches:

  $ hg -q up 3
  $ echo 8 > foo
  $ hg -q ci -m 8

  $ hg push -r 7 -r 8 ../f
  pushing to ../f
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 1 files


Merge of branch a to other branch b followed by unrelated push
on branch a:

  $ hg -q up 7
  $ HGMERGE=true hg -q merge 8
  $ hg -q ci -m 9
  $ hg -q up 8
  $ echo 10 > foo
  $ hg -q ci -m 10

  $ hg push -r 9 ../f
  pushing to ../f
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (-1 heads)

  $ hg push -r 10 ../f
  pushing to ../f
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)


Cheating the counting algorithm:

  $ hg -q up 9
  $ HGMERGE=true hg -q merge 2
  $ hg -q ci -m 11
  $ hg -q up 1
  $ echo 12 > foo
  $ hg -q ci -m 12

  $ hg push -r 11 -r 12 ../f
  pushing to ../f
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 1 files


Failed push of new named branch:

  $ echo 12 > foo
  $ hg -q ci -m 12a
  [1]
  $ hg -q up 11
  $ echo 13 > foo
  $ hg -q branch e
  $ hg -q ci -m 13d

  $ hg push -r 12 -r 13 ../f
  pushing to ../f
  searching for changes
  abort: push creates new remote branches: e!
  (use 'hg push --new-branch' to create new remote branches)
  [255]


Using --new-branch to push new named branch:

  $ hg push --new-branch -r 12 -r 13 ../f
  pushing to ../f
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files


Checking prepush logic does not allow silently pushing
multiple new heads:

  $ cd ..
  $ hg init h
  $ echo init > h/init
  $ hg -R h ci -Am init
  adding init
  $ echo a > h/a
  $ hg -R h ci -Am a
  adding a
  $ hg clone h i
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ hg -R h up 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo b > h/b
  $ hg -R h ci -Am b
  adding b
  created new head
  $ hg -R i up 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo c > i/c
  $ hg -R i ci -Am c
  adding c
  created new head

  $ hg -R i push h
  pushing to h
  searching for changes
  abort: push creates new remote heads on branch 'default'!
  (you should pull and merge or use push -f to force)
  [255]


Check prepush logic with merged branches:

  $ hg init j
  $ hg -R j branch a
  marked working directory as branch a
  $ echo init > j/foo
  $ hg -R j ci -Am init
  adding foo
  $ hg clone j k
  updating to branch a
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo a1 > j/foo
  $ hg -R j ci -m a1
  $ hg -R k branch b
  marked working directory as branch b
  $ echo b > k/foo
  $ hg -R k ci -m b
  $ hg -R k up 0
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg -R k merge b
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)

  $ hg -R k ci -m merge

  $ hg -R k push -r a j
  pushing to j
  searching for changes
  abort: push creates new remote branches: b!
  (use 'hg push --new-branch' to create new remote branches)
  [255]


Prepush -r should not allow you to sneak in new heads:

  $ hg init l
  $ cd l
  $ echo a >> foo
  $ hg -q add foo
  $ hg -q branch a
  $ hg -q ci -ma
  $ hg -q up null
  $ echo a >> foo
  $ hg -q add foo
  $ hg -q branch b
  $ hg -q ci -mb
  $ cd ..
  $ hg -q clone l m -u a
  $ cd m
  $ hg -q merge b
  $ hg -q ci -mmb
  $ hg -q up 0
  $ echo a >> foo
  $ hg -q ci -ma2
  $ hg -q up 2
  $ echo a >> foo
  $ hg -q branch -f b
  $ hg -q ci -mb2
  $ hg -q merge 3
  $ hg -q ci -mma

  $ hg push ../l -b b
  pushing to ../l
  searching for changes
  abort: push creates new remote heads on branch 'a'!
  (did you forget to merge? use push -f to force)
  [255]

  $ cd ..


Check prepush with new branch head on former topo non-head:

  $ hg init n
  $ cd n
  $ hg branch A
  marked working directory as branch A
  $ echo a >a
  $ hg ci -Ama
  adding a
  $ hg branch B
  marked working directory as branch B
  $ echo b >b
  $ hg ci -Amb
  adding b

b is now branch head of B, and a topological head
a is now branch head of A, but not a topological head

  $ hg clone . inner
  updating to branch B
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd inner
  $ hg up B
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ echo b1 >b1
  $ hg ci -Amb1
  adding b1

in the clone b1 is now the head of B

  $ cd ..
  $ hg up 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo a2 >a2
  $ hg ci -Ama2
  adding a2

a2 is now the new branch head of A, and a new topological head
it replaces a former inner branch head, so it should at most warn about
A, not B

glog of local:

  $ hg glog --template "{rev}: {branches} {desc}\n"
  @  2: A a2
  |
  | o  1: B b
  |/
  o  0: A a
  
glog of remote:

  $ hg glog -R inner --template "{rev}: {branches} {desc}\n"
  @  2: B b1
  |
  o  1: B b
  |
  o  0: A a
  
outgoing:

  $ hg out inner --template "{rev}: {branches} {desc}\n"
  comparing with inner
  searching for changes
  2: A a2

  $ hg push inner
  pushing to inner
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)

  $ cd ..


Check prepush with new branch head on former topo head:

  $ hg init o
  $ cd o
  $ hg branch A
  marked working directory as branch A
  $ echo a >a
  $ hg ci -Ama
  adding a
  $ hg branch B
  marked working directory as branch B
  $ echo b >b
  $ hg ci -Amb
  adding b

b is now branch head of B, and a topological head

  $ hg up 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo a1 >a1
  $ hg ci -Ama1
  adding a1

a1 is now branch head of A, and a topological head

  $ hg clone . inner
  updating to branch A
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd inner
  $ hg up B
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ echo b1 >b1
  $ hg ci -Amb1
  adding b1

in the clone b1 is now the head of B

  $ cd ..
  $ echo a2 >a2
  $ hg ci -Ama2
  adding a2

a2 is now the new branch head of A, and a topological head
it replaces a former topological and branch head, so this should not warn

glog of local:

  $ hg glog --template "{rev}: {branches} {desc}\n"
  @  3: A a2
  |
  o  2: A a1
  |
  | o  1: B b
  |/
  o  0: A a
  
glog of remote:

  $ hg glog -R inner --template "{rev}: {branches} {desc}\n"
  @  3: B b1
  |
  | o  2: A a1
  | |
  o |  1: B b
  |/
  o  0: A a
  
outgoing:

  $ hg out inner --template "{rev}: {branches} {desc}\n"
  comparing with inner
  searching for changes
  3: A a2

  $ hg push inner
  pushing to inner
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files

  $ cd ..


Check prepush with new branch head and new child of former branch head
but child is on different branch:

  $ hg init p
  $ cd p
  $ hg branch A
  marked working directory as branch A
  $ echo a0 >a
  $ hg ci -Ama0
  adding a
  $ echo a1 >a
  $ hg ci -ma1
  $ hg up null
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg branch B
  marked working directory as branch B
  $ echo b0 >b
  $ hg ci -Amb0
  adding b
  $ echo b1 >b
  $ hg ci -mb1

  $ hg clone . inner
  updating to branch B
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ hg up A
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg branch -f B
  marked working directory as branch B
  $ echo a3 >a
  $ hg ci -ma3
  created new head
  $ hg up 3
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg branch -f A
  marked working directory as branch A
  $ echo b3 >b
  $ hg ci -mb3
  created new head

glog of local:

  $ hg glog --template "{rev}: {branches} {desc}\n"
  @  5: A b3
  |
  | o  4: B a3
  | |
  o |  3: B b1
  | |
  o |  2: B b0
   /
  o  1: A a1
  |
  o  0: A a0
  
glog of remote:

  $ hg glog -R inner --template "{rev}: {branches} {desc}\n"
  @  3: B b1
  |
  o  2: B b0
  
  o  1: A a1
  |
  o  0: A a0
  
outgoing:

  $ hg out inner --template "{rev}: {branches} {desc}\n"
  comparing with inner
  searching for changes
  4: B a3
  5: A b3

  $ hg push inner
  pushing to inner
  searching for changes
  abort: push creates new remote heads on branch 'A'!
  (did you forget to merge? use push -f to force)
  [255]

  $ hg push inner -r4 -r5
  pushing to inner
  searching for changes
  abort: push creates new remote heads on branch 'A'!
  (did you forget to merge? use push -f to force)
  [255]

  $ hg in inner
  comparing with inner
  searching for changes
  no changes found
  [1]