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It consists of two components, a server (which is run in some central & accessible location), and one or more clients (which must be able to contact the server via HTTP).</p> <p>Philosophy statement: good development tools for Python should be easy to install, easy to hack, and not overly constraining. Two out of three ain't bad ;).</p> <p>Also see <a class="reference" href="http://buildbot.sf.net/">buildbot</a>.</p> <div class="section"> <h1><a id="requirements" name="requirements">Requirements</a></h1> <dl class="docutils"> <dt>Server side:</dt> <dd><p class="first">Jinja2 (easy_installable).</p> <p class="last">For the Quixote Web UI, Quixote 2.6 (also easy_installable).</p> </dd> <dt>Client side:</dt> <dd>Python. Should work down to Python 2.4. Developed with 2.5.</dd> </dl> </div> <div class="section"> <h1><a id="pony-build-server" name="pony-build-server">pony-build server</a></h1> <p>The command:</p> <pre class="literal-block"> python bin/run-qx-server <shelve filename> <port> </pre> <p>will run the Quixote-baesd pony-build Web app on the given port, reading & writing from the shelve database in 'filename'.</p> <p>For example,</p> <pre class="literal-block"> python bin/run-qx-server test.db 8080 </pre> <p>will run a server that can be accessed on <a class="reference" href="http://localhost:8080/">http://localhost:8080/</a>. This server will report on whatever results are sent to it by the client (see below), based on the package name ('name', below).</p> <p>See 'architecture, and extending pony-build', below.</p> </div> <div class="section"> <h1><a id="pony-build-client-scripts" name="pony-build-client-scripts">pony-build client scripts</a></h1> <div class="section"> <h2><a id="build-scripts" name="build-scripts">Build scripts</a></h2> <p>Client build scripts are just scripts that set up & run a list of commands:</p> <pre class="literal-block"> from pony_build_client import BuildCommand, TestCommand, do, send name = 'example' server_url = 'http://localhost:8080/xmlrpc' commands = [ BuildCommand(['/bin/echo', 'hello, world'], name='step 1'), TestCommand(['/bin/echo', 'this is a test'], name='step 2') ] results = do('package', commands) send('http://localhost:8080/xmlrpc', results) </pre> <p>Client results are communicated to the server by XML-RPC, so the client must be able to reach the server via the HTTP protocol.</p> <p>See <tt class="docutils literal"><span class="pre">client/build-cpython</span></tt> for an example of building a Subversion-based C project (checkout, configure, make, run tests).</p> <p>See <tt class="docutils literal"><span class="pre">client/build-pony-build</span></tt> for an example of building a Git-based Python project (clone, build, run tests).</p> </div> <div class="section"> <h2><a id="client-query-scripts" name="client-query-scripts">Client query scripts</a></h2> <p>Client query scripts request information from the server. For example, see 'bin/notify-failure-email', which checks the status of the last build of a particular package and sends an e-mail.</p> </div> </div> <div class="section"> <h1><a id="architecture-and-extending-pony-build" name="architecture-and-extending-pony-build">Architecture, and extending pony-build</a></h1> <p>The pony-build server is basically a storage receptacle for "bags" of key-value pairs. It's easiest point of extension is in the Web interface, where you can substitute any WSGI app object to serve Web pages; see 'bin/run-server', and the function call to 'server.create(...)' (aka pony_build.server.create(...)'.</p> <p>To write a new Web UI, you will need access to the stored pony-build server data. You should work through the 'PonyBuildCoordinator' interface in 'pony_build.coordinator'; you can get a handle to the current coordinator object with 'pony_build.server.get_coordinator()'. <strong>The coordinator API is will be stable and public</strong>, after suitable evolution.</p> <div class="section"> <h2><a id="client-to-server-communication" name="client-to-server-communication">Client-to-server communication</a></h2> <p>Each client sends two bags of information: the first, 'client_info', contains information global to the build client, such as package name, host name, architecture, and a list of tags. The second, 'results_list', is an ordered list of dictionaries, each one representing a build step. (The default contents of these dictionaries are pretty obvious: status, stderr, stdout, etc.) Upon receipt of this info, the pony-build server creates a third object, a dictionary, containing information such as the server time at which the result was received,</p> <p>These three bags of info -- 'receipt', 'client_info', and 'results_list' -- are it. The coordinator functions give you ways to slice and dice which results set you want (e.g. latest for a particular package), and then usually return one or more triples of (receipt, client_info, results_list).</p> <p>Clients can send arbitrary key/value pairs in their "bags"; two simple ways to extend things are to add new k/v pairs for specific purposes, and/or to use the 'tags' key in the client_info dict. The 'tags' associated value is a list of strings.</p> <p>receipt['result_key'] is the internal key used to store the result.</p> </div> </div> <div class="section"> <h1><a id="some-medium-term-ideas" name="some-medium-term-ideas">Some medium-term ideas</a></h1> <p>One an initial release is out & any obvious bugs are cleaned up, here are some ideas for the next release.</p> <p>A flexible view builder-and-saver would be nice; maybe in Django? Think, "separate results on this tag, etc; sort by time received; expect these results to be shown or give an error."</p> <p>It would be nice to be able to say "I <em>expect</em> a result from this buildhost, where is it!?"</p> <p>The build client 'subprocess' calls should be able to mimic 'tee', that is, give real-time output of the build.</p> <p>Some form of authentication from build clients. Josh Williams suggests an approved client list (server side info about what clients can conenect); I'd been thinking about a buildbot-style password setup, where build clients shared a secret with the server. Both ideas are good, I think.</p> <p>In combination with authentication, we should put a default cap on the total amount of data that can be dumped by an unauthenticated client. Otherwise warez sites will be hosted inside of pony-build ;)</p> </div> <div class="section"> <h1><a id="design-and-ideas-for-the-future" name="design-and-ideas-for-the-future">Design and Ideas for the Future</a></h1> <div class="section"> <h2><a id="ideas-that-are-easy-to-implement" name="ideas-that-are-easy-to-implement">Ideas that are easy to implement</a></h2> <p>Build virtualenv in on the client side (as a Context?)</p> <p>Dependency chains example on client side.</p> <p>Integration with unittest, nose, py.test -> ship results back to central server.</p> </div> <div class="section"> <h2><a id="cleanup" name="cleanup">Cleanup</a></h2> <p>Figure out a proper database abstraction, maybe?</p> <p>Tests, duh.</p> </div> <div class="section"> <h2><a id="things-i-don-t-know-how-to-do" name="things-i-don-t-know-how-to-do">Things I don't know how to do...</a></h2> <p>...and don't want to spend time learning ;)</p> <p>Josh Williams suggests supporting something other than a wsgiref server. I'm not sure this is really needed -- you can run whatever WSGI app you want inside the server -- but I can see that it would make things more flexible for people with existing Web server setups. I think the way to do this is to make pony-build's (XML-RPC + WSGI app) interace look like its own WSGI app, rather than hacking SimpleXMLRPCServer and wsgiref together in an unholy union. Ping me for details if you dare.</p> <p>Seriously, check out both pony_build.server.PonyBuildServer and pony_build.server.RequestHandler (the latter is the most interesting).</p> </div> <div class="section"> <h2><a id="some-general-design-principles" name="some-general-design-principles">Some general design principles</a></h2> <p>Titus says: A number of people are interested in pony-build, and I've gotten many suggestions already. This has basically forced me to articulate a number of my design principles, including some that were made un- or subconsciously, and/or just enshrined in my prototype code. I may change some of these decisions for v2, but I'd just as soon let buildbot pick up the higher-end ideas if they're game, too.</p> <blockquote> <ul> <li><p class="first">All client/server interactions should be via RPC, and hence transactional. No always-on connections, no real-time control by the central server.</p> <p>This is a major simplification and makes it possible to keep the code base small and simple. Yay.</p> </li> <li><p class="first">No partial results. Doug Phillips ('dgou') suggested that we allow build clients to "push" individual results as they happen, rather than all at once at the end. I can't think of a good, simple way to do that, and it's part of the 20% that I don't yet need myself.</p> <p>Here's a proposal that I think would work, from Doug:</p> <pre class="literal-block"> send "create new record, marked unfinished" receive "record marker, update token" send "first results, authenticate with update token" receive "ack" send "2nd results, authenticate with update token" receive "ack" ... send "final results, authenticate with update token" receive "ack" </pre> </li> </ul> </blockquote> </div> <div class="section"> <h2><a id="acks" name="acks">Acks</a></h2> <p>Titus says: Jesse Noller, Doug Philips, and Josh Williams discussed things with me and are, collectively, entirely responsible for any bad design decisions; the good ones are all mine.</p> <p>Seriously, I appreciate the suggestions and comments from these fine people, even though Doug has been a jerk to me since then.</p> <p>Eric Henry built what I would consider 'pony-build prototype 1', project-builder-pie.</p> <p>You can also read this discussion starting here,</p> <blockquote> <a class="reference" href="http://lists.idyll.org/pipermail/testing-in-python/2009-March/001277.html">http://lists.idyll.org/pipermail/testing-in-python/2009-March/001277.html</a></blockquote> <p>where Kumar suggests that I just use Hudson for chrissakes. He's probably right.</p> <p>--</p> <p>CTB 8/24/09</p> </div> </div> </div> </body> </html>
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