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What are phases?
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----------------
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Phases are a system for tracking which changesets have been or should
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be shared. This helps prevent common mistakes when modifying history
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(for instance, with the mq or rebase extensions).
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Each changeset in a repository is in one of the following phases:
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- public : changeset is visible on a public server
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- draft : changeset is not yet published
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- secret : changeset should not be pushed, pulled, or cloned
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These phases are ordered (public < draft < secret) and no changeset
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can be in a lower phase than its ancestors. For instance, if a
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changeset is public, all its ancestors are also public. Lastly,
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changeset phases only be changed towards the public phase.
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How are phases managed?
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-----------------------
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For the most part, phases should work transparently. By default, a
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changeset is created in the draft phase and is moved into the public
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phase when it is pushed to another repository.
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Once changesets become public, extensions like mq and rebase will
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refuse to operate on them to prevent creating duplicate changesets.
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Phases can also be manually manipulated with the :hg:`phase` command
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if needed. See :hg:`help -v phase` for examples.
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Phases and servers
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------------------
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Normally, all servers are ``publishing`` by default. This means::
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- all draft changesets that are pulled or cloned appear in phase
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public on the client
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- all draft changesets that are pushed appear as public on both
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client and server
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- secret changesets are neither pushed, pulled, or cloned
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.. note::
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Pulling a draft changeset from a publishing server does not mark it
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as public on the server side due to the read-only nature of pull.
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Sometimes it may be desirable to push and pull changesets in the draft
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phase to share unfinished work. This can be done by setting a
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repository to disable publishing in its configuration file::
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[phases]
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publishing = False
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See :hg:`help config` for more information on config files.
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.. note::
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Servers running older versions of Mercurial are treated as
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publishing.
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See :hg:`help phase` for information on manually manipulating phases.
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