view tests/test-single-head.t @ 37721:f7673845b167

wireprotov2: decode responses to their expected types

Callers of established wire protocol commands expect the
response from that command to be decoded into a data structure.
It's not very useful if callers get back a stream of bytes and
don't know how they should be interpreted - especially since that
stream of bytes varies by wire protocol and even the transport
within that protocol version.

This commit establishes decoding functions for various command
responses so callers of those commands get the response type
they expect.

In theory, this should make the version 2 HTTP peer usable for
various operations. But I haven't tested to confirm.

Differential Revision: https://phab.mercurial-scm.org/D3381

=====================
Test workflow options
=====================

  $ . "$TESTDIR/testlib/obsmarker-common.sh"

Test single head enforcing - Setup
=============================================

  $ cat << EOF >> $HGRCPATH
  > [experimental]
  > evolution = all
  > EOF
  $ hg init single-head-server
  $ cd single-head-server
  $ cat <<EOF >> .hg/hgrc
  > [phases]
  > publish = no
  > [experimental]
  > single-head-per-branch = yes
  > EOF
  $ mkcommit ROOT
  $ mkcommit c_dA0
  $ cd ..

  $ hg clone single-head-server client
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved

Test single head enforcing - with branch only
---------------------------------------------

  $ cd client

continuing the current defaultbranch

  $ mkcommit c_dB0
  $ hg push
  pushing to $TESTTMP/single-head-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files

creating a new branch

  $ hg up 'desc("ROOT")'
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ hg branch branch_A
  marked working directory as branch branch_A
  (branches are permanent and global, did you want a bookmark?)
  $ mkcommit c_aC0
  $ hg push --new-branch
  pushing to $TESTTMP/single-head-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)

Create a new head on the default branch

  $ hg up 'desc("c_dA0")'
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ mkcommit c_dD0
  created new head
  $ hg push -f
  pushing to $TESTTMP/single-head-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  transaction abort!
  rollback completed
  abort: rejecting multiple heads on branch "default"
  (2 heads: 286d02a6e2a2 9bf953aa81f6)
  [255]

remerge them

  $ hg merge
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ mkcommit c_dE0
  $ hg push
  pushing to $TESTTMP/single-head-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 2 changesets with 2 changes to 2 files

Test single head enforcing - after rewrite
------------------------------------------

  $ mkcommit c_dF0
  $ hg push
  pushing to $TESTTMP/single-head-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files
  $ hg commit --amend -m c_dF1
  $ hg push
  pushing to $TESTTMP/single-head-server
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 0 changes to 1 files (+1 heads)
  1 new obsolescence markers
  obsoleted 1 changesets

Check it does to interfer with strip
------------------------------------

setup

  $ hg branch branch_A --force
  marked working directory as branch branch_A
  $ mkcommit c_aG0
  created new head
  $ hg update 'desc("c_dF1")'
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ mkcommit c_dH0
  $ hg update 'desc("c_aG0")'
  1 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ hg merge
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  (branch merge, don't forget to commit)
  $ mkcommit c_aI0
  $ hg log -G
  @    changeset:   10:49003e504178
  |\   branch:      branch_A
  | |  tag:         tip
  | |  parent:      8:a33fb808fb4b
  | |  parent:      3:840af1c6bc88
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     c_aI0
  | |
  | | o  changeset:   9:fe47ea669cea
  | | |  parent:      7:99a2dc242c5d
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | | |  summary:     c_dH0
  | | |
  | o |  changeset:   8:a33fb808fb4b
  | |/   branch:      branch_A
  | |    user:        test
  | |    date:        Thu Jan 01 00:00:00 1970 +0000
  | |    summary:     c_aG0
  | |
  | o  changeset:   7:99a2dc242c5d
  | |  parent:      5:6ed1df20edb1
  | |  user:        test
  | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | |  summary:     c_dF1
  | |
  | o    changeset:   5:6ed1df20edb1
  | |\   parent:      4:9bf953aa81f6
  | | |  parent:      2:286d02a6e2a2
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | | |  summary:     c_dE0
  | | |
  | | o  changeset:   4:9bf953aa81f6
  | | |  parent:      1:134bc3852ad2
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | | |  summary:     c_dD0
  | | |
  o | |  changeset:   3:840af1c6bc88
  | | |  branch:      branch_A
  | | |  parent:      0:ea207398892e
  | | |  user:        test
  | | |  date:        Thu Jan 01 00:00:00 1970 +0000
  | | |  summary:     c_aC0
  | | |
  | o |  changeset:   2:286d02a6e2a2
  | |/   user:        test
  | |    date:        Thu Jan 01 00:00:00 1970 +0000
  | |    summary:     c_dB0
  | |
  | o  changeset:   1:134bc3852ad2
  |/   user:        test
  |    date:        Thu Jan 01 00:00:00 1970 +0000
  |    summary:     c_dA0
  |
  o  changeset:   0:ea207398892e
     user:        test
     date:        Thu Jan 01 00:00:00 1970 +0000
     summary:     ROOT
  

actual stripping

  $ hg strip --config extensions.strip= --rev 'desc("c_dH0")'
  saved backup bundle to $TESTTMP/client/.hg/strip-backup/fe47ea669cea-a41bf5a9-backup.hg
  warning: ignoring unknown working parent 49003e504178!