view tests/test-revset-dirstate-parents.t @ 31016:bf81d3b7b2ba

phases: add a getrevset method to phasecache

This is part of a refactoring that moves some phase query optimization from
revset.py to phases.py.

The motivation behind this was chg repo preloading - to make the obsstore
depend on less things (like the revset language). The refactoring also looks
good by itself - phasecache does not expose its private field "_phasesets"
via public methods and revset.py is accessing it in a hacky way.

This patch adds a "getrevset" method, which takes multiple phases and
returns a revset in an best-effort efficient way - for "public" phase, it
returns a lazy generatorset; for "draft" and "secret", it returns efficient
"baseset".

  $ HGENCODING=utf-8
  $ export HGENCODING

  $ try() {
  >   hg debugrevspec --debug $@
  > }

  $ log() {
  >   hg log --template '{rev}\n' -r "$1"
  > }

  $ hg init repo
  $ cd repo

  $ try 'p1()'
  (func
    ('symbol', 'p1')
    None)
  * set:
  <baseset []>
  $ try 'p2()'
  (func
    ('symbol', 'p2')
    None)
  * set:
  <baseset []>
  $ try 'parents()'
  (func
    ('symbol', 'parents')
    None)
  * set:
  <baseset+ []>

null revision
  $ log 'p1()'
  $ log 'p2()'
  $ log 'parents()'

working dir with a single parent
  $ echo a > a
  $ hg ci -Aqm0
  $ log 'p1()'
  0
  $ log 'tag() and p1()'
  $ log 'p2()'
  $ log 'parents()'
  0
  $ log 'tag() and parents()'

merge in progress
  $ echo b > b
  $ hg ci -Aqm1
  $ hg up -q 0
  $ echo c > c
  $ hg ci -Aqm2
  $ hg merge -q
  $ log 'p1()'
  2
  $ log 'p2()'
  1
  $ log 'tag() and p2()'
  $ log 'parents()'
  1
  2

  $ cd ..