.. _Command-line-Tool:

Command-line Tool
=================

This section describes command-line tools available after buildbot installation.

The two main command-line tools are :command:`buildbot` and :command:`buildbot-worker`.
The former handles a Buildbot master and the former handles a Buildbot worker.

Every command-line tool has a list of global options and a set of commands which have their own options.
One can run these tools in the following way:

.. code-block:: none

   buildbot [global options] command [command options]
   buildbot-worker [global options] command [command options]

The ``buildbot`` command is used on the master, while ``buildbot-worker`` is used on the worker.
Global options are the same for both tools which perform the following actions:

--help
    Print general help about available commands and global options and exit.
    All subsequent arguments are ignored.

--verbose
    Set verbose output.

--version
    Print current buildbot version and exit. All subsequent arguments are
    ignored.

You can get help on any command by specifying ``--help`` as a command option:

.. code-block:: none

   buildbot command --help

You can also use manual pages for :command:`buildbot` and :command:`buildbot-worker` for quick reference on command-line options.

The remainder of this section describes each buildbot command.
See :bb:index:`cmdline` for a full list.

buildbot
--------

The :command:`buildbot` command-line tool can be used to start or stop a buildmaster or buildbot, and to interact with a running buildmaster.
Some of its subcommands are intended for buildmaster admins, while some are for developers who are editing the code that the buildbot is monitoring.

Administrator Tools
~~~~~~~~~~~~~~~~~~~

The following :command:`buildbot` sub-commands are intended for buildmaster administrators:

.. bb:cmdline:: create-master

create-master
+++++++++++++

.. code-block:: none

    buildbot create-master -r {BASEDIR}

This creates a new directory and populates it with files that allow it to be used as a buildmaster's base directory.

You will usually want to use the option `-r` option to create a relocatable :file:`buildbot.tac`.
This allows you to move the master directory without editing this file.

.. bb:cmdline:: upgrade-master

upgrade-master
++++++++++++++

.. code-block:: none

    buildbot upgrade-master {BASEDIR}

This upgrades a previously created buildmaster's base directory for a new version of buildbot master source code.
This will copy the web server static files, and potentially upgrade the db.

.. bb:cmdline:: start (buildbot)

start
+++++

.. code-block:: none

    buildbot start [--nodaemon] {BASEDIR}

This starts a buildmaster which was already created in the given base directory.
The daemon is launched in the background, with events logged to a file named :file:`twistd.log`.

The option `--nodaemon` option instructs Buildbot to skip daemonizing.
The process will start in the foreground.
It will only return to the command-line when it is stopped.

Additionally, the user can set the environment variable `START_TIMEOUT`
to specify the amount of time the script waits for the master to start
until it declares the operation as failure.

.. bb:cmdline:: restart (buildbot)

restart
+++++++

.. code-block:: none

    buildbot restart [--nodaemon] {BASEDIR}

Restart the buildmaster.
This is equivalent to ``stop`` followed by ``start``
The option `--nodaemon` option has the same meaning as for ``start``.

.. bb:cmdline:: stop (buildbot)

stop
++++

.. code-block:: none

    buildbot stop {BASEDIR}

This terminates the daemon (either buildmaster or worker) running in the given directory.
The ``--clean`` option shuts down the buildmaster cleanly.
With ``--no-wait`` option ``buildbot stop`` command will send buildmaster shutdown signal and will immediately exit, not waiting for complete buildmaster shutdown.

.. bb:cmdline:: sighup

sighup
++++++

.. code-block:: none

    buildbot sighup {BASEDIR}

This sends a SIGHUP to the buildmaster running in the given directory, which causes it to re-read its :file:`master.cfg` file.

.. bb:cmdline:: checkconfig

checkconfig
+++++++++++

.. code-block:: none

    buildbot checkconfig {BASEDIR|CONFIG_FILE}

This checks if the buildmaster configuration is well-formed and contains no deprecated or invalid elements.
If no arguments are used or the base directory is passed as the argument the config file specified in :file:`buildbot.tac` is checked.
If the argument is the path to a config file then it will be checked without using the :file:`buildbot.tac` file.


.. bb:cmdline:: cleanupdb

cleanupdb
+++++++++

.. code-block:: none

    buildbot cleanupdb {BASEDIR|CONFIG_FILE} [-q]

This command is frontend for various database maintenance jobs:

- optimiselogs: This optimization groups logs into bigger chunks
  to apply higher level of compression.

copy-db
+++++++

.. code-block:: none

    buildbot copy-db {DESTINATION_URL} {BASEDIR} [-q]

This command copies all buildbot data from source database configured in the buildbot configuration file to the destination database.
The URL of the destination database is specified on the command line.
The destination database may have different type from the source database.

The destination database must be empty.
The script will initialize it in the same way as if a new Buildbot installation was created.

Source database must be already upgraded to the current Buildbot version by the ``buildbot upgrade-master`` command.

Developer Tools
~~~~~~~~~~~~~~~

These tools are provided for use by the developers who are working on
the code that the buildbot is monitoring.

.. bb:cmdline:: try

try
+++

This lets a developer to ask the question ``What would happen if I committed this patch right now?``.
It runs the unit test suite (across multiple build platforms) on the developer's current code, allowing them to make sure they will not break the tree when they finally commit their changes.

The ``buildbot try`` command is meant to be run from within a developer's local tree, and starts by figuring out the base revision of that tree (what revision was current the last time the tree was updated), and a patch that can be applied to that revision of the tree to make it match the developer's copy.
This ``(revision, patch)`` pair is then sent to the buildmaster, which runs a build with that :class:`SourceStamp`.
If you want, the tool will emit status messages as the builds run, and will not terminate until the first failure has been detected (or the last success).

There is an alternate form which accepts a pre-made patch file (typically the output of a command like :command:`svn diff`).
This ``--diff`` form does not require a local tree to run from.
See :ref:`try--diff` concerning the ``--diff`` command option.

For this command to work, several pieces must be in place: the :bb:sched:`Try_Jobdir` or ::bb:sched:`Try_Userpass`, as well as some client-side configuration.

Locating the master
###################

The :command:`try` command needs to be told how to connect to the try scheduler, and must know which of the authentication approaches described above is in use by the buildmaster.
You specify the approach by using ``--connect=ssh`` or ``--connect=pb`` (or ``try_connect = 'ssh'`` or ``try_connect = 'pb'`` in :file:`.buildbot/options`).

For the PB approach, the command must be given a option `--master` argument (in the form :samp:`{HOST}:{PORT}`) that points to TCP port that you picked in the :class:`Try_Userpass` scheduler.
It also takes a option `--username` and option `--passwd` pair of arguments that match one of the entries in the buildmaster's ``userpass`` list.
These arguments can also be provided as ``try_master``, ``try_username``, and ``try_password`` entries in the :file:`.buildbot/options` file.

For the SSH approach, the command must be given option `--host` and option `--username`, to get to the buildmaster host.
It must also be given option `--jobdir`, which points to the inlet directory configured above.
The jobdir can be relative to the user's home directory, but most of the time you will use an explicit path like :file:`~buildbot/project/trydir`.
These arguments can be provided in :file:`.buildbot/options` as ``try_host``, ``try_username``, ``try_password``, and ``try_jobdir``.

If you need to use something different from the default ``ssh`` command for
connecting to the remote system, you can use `--ssh` command line option or
``try_ssh`` in the configuration file.

The SSH approach also provides a option `--buildbotbin` argument to allow specification of the buildbot binary to run on the buildmaster.
This is useful in the case where buildbot is installed in a :ref:`virtualenv <Installation-in-a-Virtualenv>` on the buildmaster host, or in other circumstances where the buildbot command is not on the path of the user given by option `--username`.
The option `--buildbotbin` argument can be provided in :file:`.buildbot/options` as ``try_buildbotbin``

The following command line arguments are deprecated, but retained for backward compatibility:

--tryhost
  is replaced by option `--host`
--trydir
  is replaced by option `--jobdir`
--master
  is replaced by option `--masterstatus`

Likewise, the following :file:`.buildbot/options` file entries are deprecated, but retained for backward compatibility:

 * ``try_dir`` is replaced by ``try_jobdir``
 * ``masterstatus`` is replaced by ``try_masterstatus``

Waiting for results
###################

If you provide the option `--wait` option (or ``try_wait = True`` in :file:`.buildbot/options`), the ``buildbot try`` command will wait until your changes have either been proven good or bad before exiting.
Unless you use the option `--quiet` option (or ``try_quiet=True``), it will emit a progress message every 60 seconds until the builds have completed.

The SSH connection method does not support waiting for results.

Choosing the Builders
#####################

A trial build is performed on multiple Builders at the same time, and the developer gets to choose which Builders are used (limited to a set selected by the buildmaster admin with the :class:`TryScheduler`'s ``builderNames=`` argument).
The set you choose will depend upon what your goals are: if you are concerned about cross-platform compatibility, you should use multiple Builders, one from each platform of interest.
You might use just one builder if that platform has libraries or other facilities that allow better test coverage than what you can accomplish on your own machine, or faster test runs.

The set of Builders to use can be specified with multiple option `--builder` arguments on the command line.
It can also be specified with a single ``try_builders`` option in :file:`.buildbot/options` that uses a list of strings to specify all the Builder names:

.. code-block:: python

    try_builders = ["full-OSX", "full-win32", "full-linux"]

If you are using the PB approach, you can get the names of the builders that are configured for the try scheduler using the ``get-builder-names`` argument:

.. code-block:: bash

    buildbot try --get-builder-names --connect=pb --master=... --username=... --passwd=...

Specifying the VC system
########################

The :command:`try` command also needs to know how to take the developer's current tree and extract the (revision, patch) source-stamp pair.
Each VC system uses a different process, so you start by telling the :command:`try` command which VC system you are using, with an argument like option `--vc=cvs` or option `--vc=git`.
This can also be provided as ``try_vc`` in :file:`.buildbot/options`.

.. The order of this list comes from the end of scripts/tryclient.py

The following names are recognized: ``bzr`` ``cvs`` ``darcs`` ``hg`` ``git`` ``mtn`` ``p4`` ``svn``


Finding the top of the tree
###########################

Some VC systems (notably CVS and SVN) track each directory more-or-less independently, which means the :command:`try` command needs to move up to the top of the project tree before it will be able to construct a proper full-tree patch.
To accomplish this, the :command:`try` command will crawl up through the parent directories until it finds a marker file.
The default name for this marker file is :file:`.buildbot-top`, so when you are using CVS or SVN you should ``touch .buildbot-top`` from the top of your tree before running :command:`buildbot try`.
Alternatively, you can use a filename like :file:`ChangeLog` or :file:`README`, since many projects put one of these files in their top-most directory (and nowhere else).
To set this filename, use ``--topfile=ChangeLog``, or set it in the options file with ``try_topfile = 'ChangeLog'``.

You can also manually set the top of the tree with ``--topdir=~/trees/mytree``, or ``try_topdir = '~/trees/mytree'``.
If you use ``try_topdir``, in a :file:`.buildbot/options` file, you will need a separate options file for each tree you use, so it may be more convenient to use the ``try_topfile`` approach instead.

Other VC systems which work on full projects instead of individual directories (Darcs, Mercurial, Git, Monotone) do not require :command:`try` to know the top directory, so the option `--try-topfile` and option `--try-topdir` arguments will be ignored.

If the :command:`try` command cannot find the top directory, it will abort with an error message.

The following command line arguments are deprecated, but retained for backward compatibility:

* ``--try-topdir`` is replaced by option `--topdir`
* ``--try-topfile`` is replaced by option `--topfile`

Determining the branch name
###########################

Some VC systems record the branch information in a way that ``try`` can locate it.
For the others, if you are using something other than the default branch, you will have to tell the buildbot which branch your tree is using.
You can do this with either the option `--branch` argument, or a ``try_branch`` entry in the :file:`.buildbot/options` file.

Determining the revision and patch
##################################

Each VC system has a separate approach for determining the tree's base revision and computing a patch.

CVS
    :command:`try` pretends that the tree is up to date.
    It converts the current time into a option `-D` time specification, uses it as the base revision, and computes the diff between the upstream tree as of that point in time versus the current contents.
    This works, more or less, but requires that the local clock be in reasonably good sync with the repository.

SVN
    :command:`try` does a :command:`svn status -u` to find the latest repository revision number (emitted on the last line in the :samp:`Status against revision: {NN}` message).
    It then performs an :samp:`svn diff -r{NN}` to find out how your tree differs from the repository version, and sends the resulting patch to the buildmaster.
    If your tree is not up to date, this will result in the ``try`` tree being created with the latest revision, then *backwards* patches applied to bring it ``back`` to the version you actually checked out (plus your actual code changes), but this will still result in the correct tree being used for the build.

bzr
    :command:`try` does a ``bzr revision-info`` to find the base revision, then a ``bzr diff -r$base..`` to obtain the patch.

Mercurial
    ``hg parents --template '{node}\n'`` emits the full revision id (as opposed to the common 12-char truncated) which is a SHA1 hash of the current revision's contents.
    This is used as the base revision.
    ``hg diff`` then provides the patch relative to that revision.
    For :command:`try` to work, your working directory must only have patches that are available from the same remotely-available repository that the build process' ``source.Mercurial`` will use.

Perforce
    :command:`try` does a ``p4 changes -m1 ...`` to determine the latest changelist and implicitly assumes that the local tree is synced to this revision.
    This is followed by a ``p4 diff -du`` to obtain the patch.
    A p4 patch differs slightly from a normal diff.
    It contains full depot paths and must be converted to paths relative to the branch top.
    To convert the following restriction is imposed.
    The p4base (see :bb:chsrc:`P4Source`) is assumed to be ``//depot``

Darcs
    :command:`try` does a ``darcs changes --context`` to find the list of all patches back to and including the last tag that was made.
    This text file (plus the location of a repository that contains all these patches) is sufficient to re-create the tree.
    Therefore the contents of this ``context`` file *are* the revision stamp for a Darcs-controlled source tree.
    It then does a ``darcs diff -u`` to compute the patch relative to that revision.

Git
    ``git branch -v`` lists all the branches available in the local repository along with the revision ID it points to and a short summary of the last commit.
    The line containing the currently checked out branch begins with "\* " (star and space) while all the others start with "  " (two spaces).
    :command:`try` scans for this line and extracts the branch name and revision from it.
    Then it generates a diff against the base revision.

.. The spaces in the previous 2 literals are non-breakable spaces
   &#160;

.. todo::

    I'm not sure if this actually works the way it's intended since the extracted base revision might not actually exist in the upstream repository.
    Perhaps we need to add a --remote option to specify the remote tracking branch to generate a diff against.

Monotone
    :command:`mtn automate get_base_revision_id` emits the full revision id which is a SHA1 hash of the current revision's contents.
    This is used as the base revision.
    :command:`mtn diff` then provides the patch relative to that revision.
    For :command:`try` to work, your working directory must only have patches that are available from the same remotely-available repository that the build process' :class:`source.Monotone` will use.

patch information
#################

You can provide the option `--who=dev` to designate who is running the try build.
This will add the ``dev`` to the Reason field on the try build's status web page.
You can also set ``try_who = dev`` in the :file:`.buildbot/options` file.
Note that option `--who=dev` will not work on version 0.8.3 or earlier masters.

Similarly, option `--comment=COMMENT` will specify the comment for the patch, which is also displayed in the patch information.
The corresponding config-file option is ``try_comment``.

Sending properties
##################

You can set properties to send with your change using either the option `--property=key=value` option, which sets a single property, or the option `--properties=key1=value1,key2=value2...` option, which sets multiple comma-separated properties.
Either of these can be specified multiple times.
Note that the option `--properties` option uses commas to split on properties, so if your property value itself contains a comma, you'll need to use the option `--property` option to set it.

.. _try--diff:

try --diff
++++++++++

Sometimes you might have a patch from someone else that you want to submit to the buildbot.
For example, a user may have created a patch to fix some specific bug and sent it to you by email.
You've inspected the patch and suspect that it might do the job (and have at least confirmed that it doesn't do anything evil).
Now you want to test it out.

One approach would be to check out a new local tree, apply the patch, run your local tests, then use ``buildbot try`` to run the tests on other platforms.
An alternate approach is to use the ``buildbot try --diff`` form to have the buildbot test the patch without using a local tree.

This form takes a option `--diff` argument which points to a file that contains the patch you want to apply.
By default this patch will be applied to the TRUNK revision, but if you give the optional option `--baserev` argument, a tree of the given revision will be used as a starting point instead of TRUNK.

You can also use ``buildbot try --diff=-`` to read the patch from :file:`stdin`.

Each patch has a ``patchlevel`` associated with it.
This indicates the number of slashes (and preceding pathnames) that should be stripped before applying the diff.
This exactly corresponds to the option `-p` or option `--strip` argument to the :command:`patch` utility.
By default ``buildbot try --diff`` uses a patchlevel of 0, but you can override this with the option `-p` argument.

When you use option `--diff`, you do not need to use any of the other options that relate to a local tree, specifically option `--vc`, option `--try-topfile`, or option `--try-topdir`.
These options will be ignored.
Of course you must still specify how to get to the buildmaster (with option `--connect`, option `--tryhost`, etc).

Other Tools
~~~~~~~~~~~

These tools are generally used by buildmaster administrators.

.. bb:cmdline:: sendchange

sendchange
++++++++++

This command is used to tell the buildmaster about source changes.
It is intended to be used from within a commit script, installed on the VC server.
It requires that you have a :class:`PBChangeSource` (:bb:chsrc:`PBChangeSource`) running in the buildmaster (by being set in ``c['change_source']``).

.. code-block:: none

    buildbot sendchange --master {MASTERHOST}:{PORT} --auth {USER}:{PASS}
            --who {USER} {FILENAMES..}

The option `--auth` option specifies the credentials to use to connect to the master, in the form ``user:pass``.
If the password is omitted, then sendchange will prompt for it.
If both are omitted, the old default (username "change" and password "changepw") will be used.
Note that this password is well-known, and should not be used on an internet-accessible port.

The option `--master` and option `--username` arguments can also be given in the options file (see :ref:`buildbot-config-directory`).
There are other (optional) arguments which can influence the ``Change`` that gets submitted:

--branch
    (or option ``branch``) This provides the (string) branch specifier.
    If omitted, it defaults to ``None``, indicating the ``default branch``.
    All files included in this Change must be on the same branch.

--category
    (or option ``category``) This provides the (string) category specifier.
    If omitted, it defaults to ``None``, indicating ``no category``.
    The category property can be used by schedulers to filter what changes they listen to.

--project
    (or option ``project``) This provides the (string) project to which this change applies, and defaults to ''.
    The project can be used by schedulers to decide which builders should respond to a particular change.

--repository
    (or option ``repository``) This provides the repository from which this change came, and defaults to ``''``.

--revision
    This provides a revision specifier, appropriate to the VC system in use.

--revision_file
    This provides a filename which will be opened and the contents used as the revision specifier.
    This is specifically for Darcs, which uses the output of ``darcs changes --context`` as a revision specifier.
    This context file can be a couple of kilobytes long, spanning a couple lines per patch, and would be a hassle to pass as a command-line argument.

--property
    This parameter is used to set a property on the :class:`Change` generated by ``sendchange``.
    Properties are specified as a :samp:`{name}:{value}` pair, separated by a colon.
    You may specify many properties by passing this parameter multiple times.

--comments
    This provides the change comments as a single argument.
    You may want to use option `--logfile` instead.

--logfile
    This instructs the tool to read the change comments from the given file.
    If you use ``-`` as the filename, the tool will read the change comments from stdin.

--encoding
    Specifies the character encoding for all other parameters, defaulting to ``'utf8'``.

--vc
    Specifies which VC system the Change is coming from, one of: ``cvs``, ``svn``, ``darcs``, ``hg``, ``bzr``, ``git``, ``mtn``, or ``p4``.
    Defaults to ``None``.

.. bb:cmdline:: user

user
++++

Note that in order to use this command, you need to configure a `CommandlineUserManager` instance in your `master.cfg` file, which is explained in :ref:`Users-Options`.

This command allows you to manage users in buildbot's database.
No extra requirements are needed to use this command, aside from the Buildmaster running.
For details on how Buildbot manages users, see :ref:`Concepts-Users`.

--master
    The :command:`user` command can be run virtually anywhere provided a location of the running buildmaster.
    The option `--master` argument is of the form :samp:`{MASTERHOST}:{PORT}`.

--username
    PB connection authentication that should match the arguments to `CommandlineUserManager`.

--passwd
    PB connection authentication that should match the arguments to `CommandlineUserManager`.

--op
    There are four supported values for the option `--op` argument: ``add``, ``update``, ``remove``, and ``get``.
    Each are described in full in the following sections.

--bb_username
    Used with the option `--op=update` option, this sets the user's username for web authentication in the database.
    It requires option `--bb_password` to be set along with it.

--bb_password
    Also used with the option `--op=update` option, this sets the password portion of a user's web authentication credentials into the database.
    The password is first encrypted prior to storage for security reasons.

--ids
    When working with users, you need to be able to refer to them by unique identifiers to find particular users in the database.
    The option `--ids` option lets you specify a comma separated list of these identifiers for use with the :command:`user` command.

    The option `--ids` option is used only when using option `--op=remove` or option `--op=get`.

--info
    Users are known in buildbot as a collection of attributes tied together by some unique identifier (see :ref:`Concepts-Users`).
    These attributes are specified in the form ``{TYPE}={VALUE}`` when using the option `--info` option.
    These ``{TYPE}={VALUE}`` pairs are specified in a comma separated list, so for example:

    .. code-block:: none

        --info=svn=jdoe,git='John Doe <joe@example.com>'

    The option `--info` option can be specified multiple times in the :command:`user` command, as each specified option will be interpreted as a new user.
    Note that option `--info` is only used with option `--op=add` or with option `--op=update`, and whenever you use option `--op=update` you need to specify the identifier of the user you want to update.
    This is done by prepending the option `--info` arguments with ``{ID:}``.
    If we were to update ``'jschmo'`` from the previous example, it would look like this:

    .. code-block:: none

        --info=jdoe:git='Joe Doe <joe@example.com>'

Note that option `--master`, option `--username`, option `--passwd`, and option `--op` are always required to issue the :command:`user` command.

The option `--master`, option `--username`, and option `--passwd` options can be specified in the option file with keywords ``user_master``, ``user_username``, and ``user_passwd``, respectively.
If ``user_master`` is not specified, then option `--master` from the options file will be used instead.

Below are examples of how each command should look.
Whenever a :command:`user` command is successful, results will be shown to whoever issued the command.

For option `--op=add`:

.. code-block:: none

    buildbot user --master={MASTERHOST} --op=add \
            --username={USER} --passwd={USERPW} \
            --info={TYPE}={VALUE},...

For option `--op=update`:

.. code-block:: none

    buildbot user --master={MASTERHOST} --op=update \
            --username={USER} --passwd={USERPW} \
            --info={ID}:{TYPE}={VALUE},...

For option `--op=remove`:

.. code-block:: none

    buildbot user --master={MASTERHOST} --op=remove \
            --username={USER} --passwd={USERPW} \
            --ids={ID1},{ID2},...

For option `--op=get`:

.. code-block:: none

    buildbot user --master={MASTERHOST} --op=get \
            --username={USER} --passwd={USERPW} \
            --ids={ID1},{ID2},...

A note on option `--op=update`: when updating the option `--bb_username` and option `--bb_password`, the option `--info` doesn't need to have additional ``{TYPE}={VALUE}`` pairs to update and can just take the ``{ID}`` portion.

.. _buildbot-config-directory:

:file:`.buildbot` config directory
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Many of the :command:`buildbot` tools must be told how to contact the buildmaster that they interact with.
This specification can be provided as a command-line argument, but most of the time it will be easier to set them in an ``options`` file.
The :command:`buildbot` command will look for a special directory named :file:`.buildbot`, starting from the current directory (where the command was run) and crawling upwards, eventually looking in the user's home directory.
It will look for a file named :file:`options` in this directory, and will evaluate it as a Python script, looking for certain names to be set.
You can just put simple ``name = 'value'`` pairs in this file to set the options.

For a description of the names used in this file, please see the documentation for the individual :command:`buildbot` sub-commands.
The following is a brief sample of what this file's contents could be.

.. code-block:: none

    # for status-reading tools
    masterstatus = 'buildbot.example.org:12345'
    # for 'sendchange' or the debug port
    master = 'buildbot.example.org:18990'

Note carefully that the names in the :file:`options` file usually do not match the command-line option name.

``master``
    Equivalent to option `--master` for :bb:cmdline:`sendchange`.
    It is the location of the :class:`pb.PBChangeSource` for ```sendchange``.

``username``
    Equivalent to option `--username` for the :bb:cmdline:`sendchange` command.

``branch``
    Equivalent to option `--branch` for the :bb:cmdline:`sendchange` command.

``category``
    Equivalent to option `--category` for the :bb:cmdline:`sendchange` command.

``try_connect``
    Equivalent to option `--connect`, this specifies how the :bb:cmdline:`try` command should deliver its request to the buildmaster.
    The currently accepted values are ``ssh`` and ``pb``.

``try_builders``
    Equivalent to option `--builders`, specifies which builders should be used for the :bb:cmdline:`try` build.

``try_vc``
    Equivalent to option `--vc` for :bb:cmdline:`try`, this specifies the version control system being used.

``try_branch``
    Equivalent to option `--branch`, this indicates that the current tree is on a non-trunk branch.

``try_topdir``

``try_topfile``
    Use ``try_topdir``, equivalent to option `--try-topdir`, to explicitly indicate the top of your working tree, or ``try_topfile``, equivalent to option `--try-topfile` to name a file that will only be found in that top-most directory.

``try_host``

``try_username``

``try_dir``
    When ``try_connect`` is ``ssh``, the command will use ``try_host`` for option `--tryhost`, ``try_username`` for option `--username`, and ``try_dir`` for option `--trydir`.
    Apologies for the confusing presence and absence of 'try'.

``try_username``

``try_password``

``try_master``
    Similarly, when ``try_connect`` is ``pb``, the command will pay attention to ``try_username`` for option `--username`, ``try_password`` for option `--passwd`, and ``try_master`` for option `--master`.

``try_wait``

``masterstatus``
    ``try_wait`` and ``masterstatus`` (equivalent to option `--wait` and ``master``, respectively) are used to ask the :bb:cmdline:`try` command to wait for the requested build to complete.

buildbot-worker
---------------

:command:`buildbot-worker` command-line tool is used for worker management only and does not provide any additional functionality.
One can create, start, stop and restart the worker.

.. bb:cmdline:: create-worker

create-worker
~~~~~~~~~~~~~

This creates a new directory and populates it with files that let it be used as a worker's base directory.
You must provide several arguments, which are used to create the initial :file:`buildbot.tac` file.

The option `-r` option is advisable here, just like for ``create-master``.

.. code-block:: none

    buildbot-worker create-worker -r {BASEDIR} {MASTERHOST}:{PORT} {WORKERNAME} {PASSWORD}

The create-worker options are described in :ref:`Worker-Options`.

.. bb:cmdline:: start (worker)

start
~~~~~

This starts a worker which was already created in the given base directory.
The daemon is launched in the background, with events logged to a file named :file:`twistd.log`.

.. code-block:: none

    buildbot-worker start [--nodaemon] BASEDIR

The option `--nodaemon` option instructs Buildbot to skip daemonizing.
The process will start in the foreground.
It will only return to the command-line when it is stopped.

.. bb:cmdline:: restart (worker)

restart
~~~~~~~

.. code-block:: none

    buildbot-worker restart [--nodaemon] BASEDIR

This restarts a worker which is already running.
It is equivalent to a ``stop`` followed by a ``start``.

The option `--nodaemon` option has the same meaning as for ``start``.

.. bb:cmdline:: stop (worker)

stop
~~~~

This terminates the daemon worker running in the given directory.

.. code-block:: none

    buildbot stop BASEDIR
