view tests/test-push-checkheads-unpushed-D6.t @ 37210:2a2ce93e12f4

templatefuncs: add mailmap template function

This commit adds a template function to support the .mailmap file
in Mercurial repositories. The .mailmap file comes from git, and
can be used to map new emails and names for old commits. The general
use case is that someone may change their name or author commits
under different emails and aliases, which would make these
commits appear as though they came from different persons. The
file allows you to specify the correct name that should be used
in place of the author field specified in the commit.

The mailmap file has 4 possible formats used to map old "commit"
names to new "proper" names:

1. <[e-mail]> <[e-mail]>
2. Proper Name <[e-mail]>
3. Proper Name <[e-mail]> <[e-mail]>
4. Proper Name <[e-mail]> Commit Name <[e-mail]>

Essentially there is a commit email present in each mailmap entry,
that maps to either an updated name, email, or both. The final
possible format allows commits authored by a person who used
both an old name and an old email to map to a new name and email.

To parse the file, we split by spaces and build a name out
of every element that does not start with "<". Once we find an element
that does start with "<" we concatenate all the name elements that preceded
and add that as a parsed name. We then add the email as the first
parsed email. We repeat the process until the end of the line, or
a comment is found. We will be left with all parsed names in a list,
and all parsed emails in a list, with the 0 index being the proper
values and the 1 index being the commit values (if they were specified
in the entry).

The commit values are added as the keys to a dict, and with the proper
fields as the values. The mapname function takes the mapping object and
the commit author field and attempts to look for a corresponding entry.
To do so we try (commit name, commit email) first, and if no results are
returned then (None, commit email) is also looked up. This is due to
format 4 from above, where someone may have a mailmap entry with both
name and email, and if they don't it is possible they have an entry that
uses only the commit email.

Differential Revision: https://phab.mercurial-scm.org/D2904

====================================
Testing head checking code: Case D-6
====================================

Mercurial checks for the introduction of new heads on push. Evolution comes
into play to detect if existing branches on the server are being replaced by
some of the new one we push.

This case is part of a series of tests checking this behavior.

Category D: remote head is "obs-affected" locally, but result is not part of the push
TestCase 6: single changeset, superseeded then pruned (on a new changeset unpushed) changeset

This is a partial push variation of case B-6

.. old-state:
..
.. * 1 changeset branch
..
.. new-state:
..
.. * old branch is rewritten onto another one,
.. * the new version is then pruned.
..
.. expected-result:
..
.. * push denied
..
.. graph-summary:
..
..   A ø⇠⊗ A'
..     | |
.. C ◔ | ○ B
..    \|/
..     ●

  $ . $TESTDIR/testlib/push-checkheads-util.sh

Test setup
----------

  $ mkdir D6
  $ cd D6
  $ setuprepos
  creating basic server and client repo
  updating to branch default
  2 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd client
  $ hg up 0
  0 files updated, 0 files merged, 1 files removed, 0 files unresolved
  $ mkcommit B0
  created new head
  $ mkcommit A1
  $ hg up '0'
  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
  $ mkcommit C0
  created new head
  $ hg debugobsolete `getid "desc(A0)"` `getid "desc(A1)"`
  obsoleted 1 changesets
  $ hg debugobsolete --record-parents `getid "desc(A1)"`
  obsoleted 1 changesets
  $ hg log -G --hidden
  @  0f88766e02d6 (draft): C0
  |
  | x  ba93660aff8d (draft): A1
  | |
  | o  74ff5441d343 (draft): B0
  |/
  | x  8aaa48160adc (draft): A0
  |/
  o  1e4be0697311 (public): root
  

Actual testing
--------------

  $ hg push --rev 'desc(C0)'
  pushing to $TESTTMP/D6/server
  searching for changes
  abort: push creates new remote head 0f88766e02d6!
  (merge or see 'hg help push' for details about pushing new heads)
  [255]

  $ cd ../..