comparison tests/test-help.t @ 27266:4dccc37b87bd

ui: support declaring path push urls as sub-options

Power users often want to apply per-path configuration options. For
example, they may want to declare an alternate URL for push operations
or declare a revset of revisions to push when `hg push` is used
(as opposed to attempting to push all revisions by default).

This patch establishes the use of sub-options (config options with
":" in the name) to declare additional behavior for paths.

New sub-options are declared by using the new ``@ui.pathsuboption``
decorator. This decorator serves multiple purposes:

* Declaring which sub-options are registered
* Declaring how a sub-option maps to an attribute on ``path``
  instances (this is needed to `hg paths` can render sub-options
  and values properly)
* Validation and normalization of config options to attribute
  values
* Allows extensions to declare new sub-options without monkeypatching
* Allows extensions to overwrite built-in behavior for sub-option
  handling

As convenient as the new option registration decorator is, extensions
(and even core functionality) may still need an additional hook point
to perform finalization of path instances. For example, they may wish
to validate that multiple options/attributes aren't conflicting with
each other. This hook point could be added later, if needed.

To prove this new functionality works, we implement the "pushurl"
path sub-option. This option declares the URL that `hg push` should
use by default.

We require that "pushurl" is an actual URL. This requirement might be
controversial and could be dropped if there is opposition. However,
objectors should read the complicated code in ui.path.__init__ and
commands.push for resolving non-URL values before making a judgement.

We also don't allow #fragment in the URLs. I intend to introduce a
":pushrev" (or similar) option to define a revset to control which
revisions are pushed when "-r <rev>" isn't passed into `hg push`.
This is much more powerful than #fragment and I don't think #fragment
is useful enough to continue supporting.

The [paths] section of the "config" help page has been updated
significantly. `hg paths` has been taught to display path sub-options.

The docs mention that "default-push" is now deprecated. However, there
are several references to it that need to be cleaned up. A large part
of this is converting more consumers to the new paths API. This will
happen naturally as more path sub-options are added and more and more
components need to access them.

27265:47539ea08bdb

  $ hg help hgrc.paths
      "paths"
      -------
  
      Assigns symbolic names to repositories. The left side is the symbolic
      name, and the right gives the directory or URL that is the location of the
      repository. Default paths can be declared by setting the following
      entries.
  
      "default"
          Directory or URL to use when pulling if no source is specified.
          (default: repository from which the current repository was cloned)
  
      "default-push"
          Optional. Directory or URL to use when pushing if no destination is
          specified.
  
      Custom paths can be defined by assigning the path to a name that later can
      be used from the command line. Example:
  
        [paths]
        my_path = http://example.com/path
  
      To push to the path defined in "my_path" run the command:
  
        hg push my_path
  
  $ hg help glossary.mcguffin
  abort: help section not found
  [255]

27266:4dccc37b87bd

  $ hg help hgrc.paths
      "paths"
      -------
  
      Assigns symbolic names and behavior to repositories.
  
      Options are symbolic names defining the URL or directory that is the
      location of the repository. Example:
  
        [paths]
        my_server = https://example.com/my_repo
        local_path = /home/me/repo
  
      These symbolic names can be used from the command line. To pull from
      "my_server": "hg pull my_server". To push to "local_path": "hg push
      local_path".
  
      Options containing colons (":") denote sub-options that can influence
      behavior for that specific path. Example:
  
        [paths]
        my_server = https://example.com/my_path
        my_server:pushurl = ssh://example.com/my_path
  
      The following sub-options can be defined:
  
      "pushurl"
         The URL to use for push operations. If not defined, the location
         defined by the path's main entry is used.
  
      The following special named paths exist:
  
      "default"
         The URL or directory to use when no source or remote is specified.
  
         "hg clone" will automatically define this path to the location the
         repository was cloned from.
  
      "default-push"
         (deprecated) The URL or directory for the default "hg push" location.
         "default:pushurl" should be used instead.
  
  $ hg help glossary.mcguffin
  abort: help section not found
  [255]