view tests/test-pull-update.t @ 27583:37d50250b696

registrar: add funcregistrar class to register function for specific purpose

This class centralizes the common logic to register function for
specific purpose like below:

    - template keyword, filter and function
    - revset predicate
    - fileset predicate
    - webcommand

'funcregistrar' also formats help document of the function with the
'decl'(aration) specified at the construction.

This can avoid (1) redundancy between 'decl' and help document, and
(2) accidental typo of help document. For example, 'foo' should appear
twice like below, if without such formatting:

    @keyword('foo')
    def foo(....):
        """:foo: Explanation of keyword foo ..."""

Almost all cases needs very simple document formatting like below:

    - "``DECL``\n    EXPLANATION"
    - ":DECL: EXPLANATION"

But webcommand needs a little complicated formatting like:

    /PATH/SPEC
    ----------

    EXPLANATION ....

To make minirst recognize the section header, hyphen line should be as
long as "/PATH/SPEC". It should be arranged by program.

Implementing 'formatdoc()' in derived class can support complicated
formatting in the latter case. But it seems redundant for simple one
in the former case.

Therefore, 'funcregistrar' does:

    - invoke 'self.formatdoc', if it is callable (for the latter case)
    - use it as the format string, otherwise (for the former case)

  $ hg init t
  $ cd t
  $ echo 1 > foo
  $ hg ci -Am m
  adding foo

  $ cd ..
  $ hg clone t tt
  updating to branch default
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd tt
  $ echo 1.1 > foo
  $ hg ci -Am m

  $ cd ../t
  $ echo 1.2 > foo
  $ hg ci -Am m

Should not update:

  $ hg pull -u ../tt
  pulling from ../tt
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  abort: not updating: not a linear update
  (merge or update --check to force update)
  [255]

  $ cd ../tt

Should not update:

  $ hg pull -u ../t
  pulling from ../t
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (+1 heads)
  abort: not updating: not a linear update
  (merge or update --check to force update)
  [255]

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

  $ cd ../t

Should work:

  $ hg pull -u ../tt
  pulling from ../tt
  searching for changes
  adding changesets
  adding manifests
  adding file changes
  added 1 changesets with 1 changes to 1 files (-1 heads)
  1 files updated, 0 files merged, 0 files removed, 0 files unresolved

  $ cd ..