Files

Class/Module Index [+]

Quicksearch

Capistrano::Deploy::SCM::Darcs

Implements the Capistrano SCM interface for the darcs revision control system (www.abridgegame.org/darcs/).

Public Instance Methods

checkout(revision, destination) click to toggle source

Returns the command that will check out the given revision to the given destination. The 'revision' parameter must be the 'hash' value for the revision in question, as given by 'darcs changes --xml-output'.

# File lib/capistrano/recipes/deploy/scm/darcs.rb, line 32
def checkout(revision, destination)
  scm :get, *[verbose, 
              "--repo-name=#{destination}", 
              to_match(revision),
              repository].compact
end
diff(from, to=nil) click to toggle source

Returns the command that will do a "darcs diff" for the two revisions. Each revision must be the 'hash' identifier of a darcs revision.

# File lib/capistrano/recipes/deploy/scm/darcs.rb, line 57
def diff(from, to=nil)
  scm :diff, "--from-match 'hash #{from}'", to && "--to-match 'hash #{to}'"
end
export(revision, destination) click to toggle source

Darcs does not have a real 'export' option; there is 'darcs dist', but that presupposes a utility that can untar and ungzip the dist file. We'll cheat and just do a get, followed by a deletion of the _darcs metadata directory.

# File lib/capistrano/recipes/deploy/scm/darcs.rb, line 51
def export(revision, destination)
  [checkout(revision, destination), "rm -rf #{destination}/_darcs"].join(" && ")
end
head() click to toggle source

Because darcs does not have any support for pseudo-ids, we'll just return something here that we can use in the helpers below for determining whether we need to look up the latest revision.

# File lib/capistrano/recipes/deploy/scm/darcs.rb, line 17
def head
  :head
end
log(from, to=nil) click to toggle source

Returns the log of changes between the two revisions. Each revision must be the 'hash' identifier of a darcs revision.

# File lib/capistrano/recipes/deploy/scm/darcs.rb, line 63
def log(from, to=nil)
  scm :changes, "--from-match 'hash #{from}'", to && "--to-match 'hash #{to}'", "--repo=#{repository}"
end
query_revision(revision) click to toggle source

Attempts to translate the given revision identifier to a "real" revision. If the identifier is a symbol, it is assumed to be a pseudo-id. Otherwise, it will be immediately returned. If it is a pseudo-id, a set of commands to execute will be yielded, and the result of executing those commands must be returned by the block. This method will then extract the actual revision hash from the returned data.

# File lib/capistrano/recipes/deploy/scm/darcs.rb, line 74
def query_revision(revision)
  case revision
  when :head
    xml = yield(scm(:changes, "--last 1", "--xml-output", "--repo=#{repository}"))
    return xml[/hash='(.*?)'/, 1]
  else return revision
  end
end
sync(revision, destination) click to toggle source

Tries to update the destination repository in-place, to bring it up to the given revision. Note that because darcs' "pull" operation does not support a "to-match" argument (or similar), this basically nukes the destination directory and re-gets it.

# File lib/capistrano/recipes/deploy/scm/darcs.rb, line 43
def sync(revision, destination)
  ["rm -rf #{destination}", checkout(revision, destination)].join(" && ")
end
to_match(revision) click to toggle source
# File lib/capistrano/recipes/deploy/scm/darcs.rb, line 21
def to_match(revision)
  if revision.nil? || revision == self.head
    nil
  else
    "--to-match='hash #{revision}'"
  end
end

[Validate]

Generated with the Darkfish Rdoc Generator 2.