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Tools</a></li><li class="chapter-item expanded "><a href="../usage/administration/state_groups.html">State Groups</a></li><li class="chapter-item expanded "><a href="../usage/administration/request_log.html">Request log format</a></li><li class="chapter-item expanded "><a href="../usage/administration/admin_faq.html">Admin FAQ</a></li><li class="chapter-item expanded "><div>Scripts</div></li></ol></li><li class="chapter-item expanded "><li class="part-title">Development</li><li class="chapter-item expanded "><a href="../development/contributing_guide.html">Contributing Guide</a></li><li class="chapter-item expanded "><a href="../code_style.html">Code Style</a></li><li class="chapter-item expanded "><a href="../development/reviews.html">Reviewing Code</a></li><li class="chapter-item expanded "><a href="../development/releases.html">Release Cycle</a></li><li class="chapter-item expanded "><a href="../development/git.html">Git Usage</a></li><li class="chapter-item expanded 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href="../auth_chain_difference_algorithm.html">The Auth Chain Difference Algorithm</a></li></ol></li><li class="chapter-item expanded "><a href="../media_repository.html">Media Repository</a></li><li class="chapter-item expanded "><a href="../room_and_user_statistics.html">Room and User Statistics</a></li></ol></li><li class="chapter-item expanded "><div>Scripts</div></li><li class="chapter-item expanded affix "><li class="part-title">Other</li><li class="chapter-item expanded "><a href="../deprecation_policy.html">Dependency Deprecation Policy</a></li><li class="chapter-item expanded "><a href="../other/running_synapse_on_single_board_computers.html">Running Synapse on a Single-Board Computer</a></li></ol> + </div> + <div id="sidebar-resize-handle" class="sidebar-resize-handle"></div> + </nav> + + <div id="page-wrapper" class="page-wrapper"> + + <div class="page"> + <div id="menu-bar-hover-placeholder"></div> + <div id="menu-bar" class="menu-bar sticky bordered"> + <div 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(Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar"> + <i class="fa fa-search"></i> + </button> + <div class="version-picker"> + <div class="dropdown"> + <div class="select"> + <span></span> + <i class="fa fa-chevron-down"></i> + </div> + <input type="hidden" name="version"> + <ul class="dropdown-menu"> + <!-- Versions will be added dynamically in version-picker.js --> + </ul> + </div> + </div> + </div> + + <h1 class="menu-title">Synapse</h1> + + <div class="right-buttons"> + <a href="../print.html" title="Print this book" aria-label="Print this book"> + <i id="print-button" class="fa fa-print"></i> + </a> + <a href="https://github.com/element-hq/synapse" title="Git repository" aria-label="Git repository"> + <i id="git-repository-button" class="fa fa-github"></i> + </a> + <a href="https://github.com/element-hq/synapse/edit/develop/docs/development/dependencies.md" title="Suggest an edit" aria-label="Suggest an edit"> + <i id="git-edit-button" class="fa fa-edit"></i> + </a> + </div> + </div> + + <div id="search-wrapper" class="hidden"> + <form id="searchbar-outer" class="searchbar-outer"> + <input type="search" id="searchbar" name="searchbar" placeholder="Search this book ..." aria-controls="searchresults-outer" aria-describedby="searchresults-header"> + </form> + <div id="searchresults-outer" class="searchresults-outer hidden"> + <div id="searchresults-header" class="searchresults-header"></div> + <ul id="searchresults"> + </ul> + </div> + </div> + <!-- Apply ARIA attributes after the sidebar and the sidebar toggle button are added to the DOM --> + <script type="text/javascript"> + document.getElementById('sidebar-toggle').setAttribute('aria-expanded', sidebar === 'visible'); + document.getElementById('sidebar').setAttribute('aria-hidden', sidebar !== 'visible'); + Array.from(document.querySelectorAll('#sidebar a')).forEach(function(link) { + link.setAttribute('tabIndex', sidebar === 'visible' ? 0 : -1); + }); + </script> + + <div id="content" class="content"> + <main> + <!-- Page table of contents --> + <div class="sidetoc"> + <nav class="pagetoc"></nav> + </div> + + <h1 id="managing-dependencies-with-poetry"><a class="header" href="#managing-dependencies-with-poetry">Managing dependencies with Poetry</a></h1> +<p>This is a quick cheat sheet for developers on how to use <a href="https://python-poetry.org/"><code>poetry</code></a>.</p> +<h1 id="installing"><a class="header" href="#installing">Installing</a></h1> +<p>See the <a href="contributing_guide.html#4-install-the-dependencies">contributing guide</a>.</p> +<p>Developers should use Poetry 1.3.2 or higher. If you encounter problems related +to poetry, please <a href="#check-the-version-of-poetry-with-poetry---version">double-check your poetry version</a>.</p> +<h1 id="background"><a class="header" href="#background">Background</a></h1> +<p>Synapse uses a variety of third-party Python packages to function as a homeserver. +Some of these are direct dependencies, listed in <code>pyproject.toml</code> under the +<code>[tool.poetry.dependencies]</code> section. The rest are transitive dependencies (the +things that our direct dependencies themselves depend on, and so on recursively.)</p> +<p>We maintain a locked list of all our dependencies (transitive included) so that +we can track exactly which version of each dependency appears in a given release. +See <a href="https://github.com/matrix-org/synapse/issues/11537#issue-1074469665">here</a> +for discussion of why we wanted this for Synapse. We chose to use +<a href="https://python-poetry.org/"><code>poetry</code></a> to manage this locked list; see +<a href="https://github.com/matrix-org/synapse/issues/11537#issuecomment-1015975819">this comment</a> +for the reasoning.</p> +<p>The locked dependencies get included in our "self-contained" releases: namely, +our docker images and our debian packages. We also use the locked dependencies +in development and our continuous integration.</p> +<p>Separately, our "broad" dependencies—the version ranges specified in +<code>pyproject.toml</code>—are included as metadata in our "sdists" and "wheels" <a href="https://pypi.org/project/matrix-synapse">uploaded +to PyPI</a>. Installing from PyPI or from +the Synapse source tree directly will <em>not</em> use the locked dependencies; instead, +they'll pull in the latest version of each package available at install time.</p> +<h2 id="example-dependency"><a class="header" href="#example-dependency">Example dependency</a></h2> +<p>An example may help. We have a broad dependency on +<a href="https://pypi.org/project/phonenumbers/"><code>phonenumbers</code></a>, as declared in +this snippet from pyproject.toml <a href="https://github.com/matrix-org/synapse/blob/release-v1.57/pyproject.toml#L133">as of Synapse 1.57</a>:</p> +<pre><code class="language-toml">[tool.poetry.dependencies] +# ... +phonenumbers = ">=8.2.0" +</code></pre> +<p>In our lockfile this is +<a href="https://github.com/matrix-org/synapse/blob/dfc7646504cef3e4ff396c36089e1c6f1b1634de/poetry.lock#L679-L685">pinned</a> +to version 8.12.44, even though +<a href="https://pypi.org/project/phonenumbers/#history">newer versions are available</a>.</p> +<pre><code class="language-toml">[[package]] +name = "phonenumbers" +version = "8.12.44" +description = "Python version of Google's common library for parsing, formatting, storing and validating international phone numbers." +category = "main" +optional = false +python-versions = "*" +</code></pre> +<p>The lockfile also includes a +<a href="https://github.com/matrix-org/synapse/blob/release-v1.57/poetry.lock#L2178-L2181">cryptographic checksum</a> +of the sdists and wheels provided for this version of <code>phonenumbers</code>.</p> +<pre><code class="language-toml">[metadata.files] +# ... +phonenumbers = [ + {file = "phonenumbers-8.12.44-py2.py3-none-any.whl", hash = "sha256:cc1299cf37b309ecab6214297663ab86cb3d64ae37fd5b88e904fe7983a874a6"}, + {file = "phonenumbers-8.12.44.tar.gz", hash = "sha256:26cfd0257d1704fe2f88caff2caabb70d16a877b1e65b6aae51f9fbbe10aa8ce"}, +] +</code></pre> +<p>We can see this pinned version inside the docker image for that release:</p> +<pre><code>$ docker pull vectorim/synapse:v1.97.0 +... +$ docker run --entrypoint pip vectorim/synapse:v1.97.0 show phonenumbers +Name: phonenumbers +Version: 8.12.44 +Summary: Python version of Google's common library for parsing, formatting, storing and validating international phone numbers. +Home-page: https://github.com/daviddrysdale/python-phonenumbers +Author: David Drysdale +Author-email: dmd@lurklurk.org +License: Apache License 2.0 +Location: /usr/local/lib/python3.9/site-packages +Requires: +Required-by: matrix-synapse +</code></pre> +<p>Whereas the wheel metadata just contains the broad dependencies:</p> +<pre><code>$ cd /tmp +$ wget https://files.pythonhosted.org/packages/ca/5e/d722d572cc5b3092402b783d6b7185901b444427633bd8a6b00ea0dd41b7/matrix_synapse-1.57.0rc1-py3-none-any.whl +... +$ unzip -c matrix_synapse-1.57.0rc1-py3-none-any.whl matrix_synapse-1.57.0rc1.dist-info/METADATA | grep phonenumbers +Requires-Dist: phonenumbers (>=8.2.0) +</code></pre> +<h1 id="tooling-recommendation-direnv"><a class="header" href="#tooling-recommendation-direnv">Tooling recommendation: direnv</a></h1> +<p><a href="https://direnv.net/"><code>direnv</code></a> is a tool for activating environments in your +shell inside a given directory. Its support for poetry is unofficial (a +community wiki recipe only), but works solidly in our experience. We thoroughly +recommend it for daily use. To use it:</p> +<ol> +<li><a href="https://direnv.net/docs/installation.html">Install <code>direnv</code></a> - it's likely +packaged for your system already.</li> +<li>Teach direnv about poetry. The <a href="https://github.com/direnv/direnv/wiki/Python#poetry">shell config here</a> +needs to be added to <code>~/.config/direnv/direnvrc</code> (or more generally <code>$XDG_CONFIG_HOME/direnv/direnvrc</code>).</li> +<li>Mark the synapse checkout as a poetry project: <code>echo layout poetry > .envrc</code>.</li> +<li>Convince yourself that you trust this <code>.envrc</code> configuration and project. +Then formally confirm this to <code>direnv</code> by running <code>direnv allow</code>.</li> +</ol> +<p>Then whenever you navigate to the synapse checkout, you should be able to run +e.g. <code>mypy</code> instead of <code>poetry run mypy</code>; <code>python</code> instead of +<code>poetry run python</code>; and your shell commands will automatically run in the +context of poetry's venv, without having to run <code>poetry shell</code> beforehand.</p> +<h1 id="how-do-i"><a class="header" href="#how-do-i">How do I...</a></h1> +<h2 id="reset-my-venv-to-the-locked-environment"><a class="header" href="#reset-my-venv-to-the-locked-environment">...reset my venv to the locked environment?</a></h2> +<pre><code class="language-shell">poetry install --all-extras --sync +</code></pre> +<h2 id="delete-everything-and-start-over-from-scratch"><a class="header" href="#delete-everything-and-start-over-from-scratch">...delete everything and start over from scratch?</a></h2> +<pre><code class="language-shell"># Stop the current virtualenv if active +$ deactivate + +# Remove all of the files from the current environment. +# Don't worry, even though it says "all", this will only +# remove the Poetry virtualenvs for the current project. +$ poetry env remove --all + +# Reactivate Poetry shell to create the virtualenv again +$ poetry shell +# Install everything again +$ poetry install --extras all +</code></pre> +<h2 id="run-a-command-in-the-poetry-virtualenv"><a class="header" href="#run-a-command-in-the-poetry-virtualenv">...run a command in the <code>poetry</code> virtualenv?</a></h2> +<p>Use <code>poetry run cmd args</code> when you need the python virtualenv context. +To avoid typing <code>poetry run</code> all the time, you can run <code>poetry shell</code> +to start a new shell in the poetry virtualenv context. Within <code>poetry shell</code>, +<code>python</code>, <code>pip</code>, <code>mypy</code>, <code>trial</code>, etc. are all run inside the project virtualenv +and isolated from the rest o the system.</p> +<p>Roughly speaking, the translation from a traditional virtualenv is:</p> +<ul> +<li><code>env/bin/activate</code> -> <code>poetry shell</code>, and</li> +<li><code>deactivate</code> -> close the terminal (Ctrl-D, <code>exit</code>, etc.)</li> +</ul> +<p>See also the direnv recommendation above, which makes <code>poetry run</code> and +<code>poetry shell</code> unnecessary.</p> +<h2 id="inspect-the-poetry-virtualenv"><a class="header" href="#inspect-the-poetry-virtualenv">...inspect the <code>poetry</code> virtualenv?</a></h2> +<p>Some suggestions:</p> +<pre><code class="language-shell"># Current env only +poetry env info +# All envs: this allows you to have e.g. a poetry managed venv for Python 3.7, +# and another for Python 3.10. +poetry env list --full-path +poetry run pip list +</code></pre> +<p>Note that <code>poetry show</code> describes the abstract <em>lock file</em> rather than your +on-disk environment. With that said, <code>poetry show --tree</code> can sometimes be +useful.</p> +<h2 id="add-a-new-dependency"><a class="header" href="#add-a-new-dependency">...add a new dependency?</a></h2> +<p>Either:</p> +<ul> +<li>manually update <code>pyproject.toml</code>; then <code>poetry lock --no-update</code>; or else</li> +<li><code>poetry add packagename</code>. See <code>poetry add --help</code>; note the <code>--dev</code>, +<code>--extras</code> and <code>--optional</code> flags in particular.</li> +</ul> +<p>Include the updated <code>pyproject.toml</code> and <code>poetry.lock</code> files in your commit.</p> +<h2 id="remove-a-dependency"><a class="header" href="#remove-a-dependency">...remove a dependency?</a></h2> +<p>This is not done often and is untested, but</p> +<pre><code class="language-shell">poetry remove packagename +</code></pre> +<p>ought to do the trick. Alternatively, manually update <code>pyproject.toml</code> and +<code>poetry lock --no-update</code>. Include the updated <code>pyproject.toml</code> and <code>poetry.lock</code> +files in your commit.</p> +<h2 id="update-the-version-range-for-an-existing-dependency"><a class="header" href="#update-the-version-range-for-an-existing-dependency">...update the version range for an existing dependency?</a></h2> +<p>Best done by manually editing <code>pyproject.toml</code>, then <code>poetry lock --no-update</code>. +Include the updated <code>pyproject.toml</code> and <code>poetry.lock</code> in your commit.</p> +<h2 id="update-a-dependency-in-the-locked-environment"><a class="header" href="#update-a-dependency-in-the-locked-environment">...update a dependency in the locked environment?</a></h2> +<p>Use</p> +<pre><code class="language-shell">poetry update packagename +</code></pre> +<p>to use the latest version of <code>packagename</code> in the locked environment, without +affecting the broad dependencies listed in the wheel.</p> +<p>There doesn't seem to be a way to do this whilst locking a <em>specific</em> version of +<code>packagename</code>. We can workaround this (crudely) as follows:</p> +<pre><code class="language-shell">poetry add packagename==1.2.3 +# This should update pyproject.lock. + +# Now undo the changes to pyproject.toml. For example +# git restore pyproject.toml + +# Get poetry to recompute the content-hash of pyproject.toml without changing +# the locked package versions. +poetry lock --no-update +</code></pre> +<p>Either way, include the updated <code>poetry.lock</code> file in your commit.</p> +<h2 id="export-a-requirementstxt-file"><a class="header" href="#export-a-requirementstxt-file">...export a <code>requirements.txt</code> file?</a></h2> +<pre><code class="language-shell">poetry export --extras all +</code></pre> +<p>Be wary of bugs in <code>poetry export</code> and <code>pip install -r requirements.txt</code>.</p> +<h2 id="build-a-test-wheel"><a class="header" href="#build-a-test-wheel">...build a test wheel?</a></h2> +<p>I usually use</p> +<pre><code class="language-shell">poetry run pip install build && poetry run python -m build +</code></pre> +<p>because <a href="https://github.com/pypa/build"><code>build</code></a> is a standardish tool which +doesn't require poetry. (It's what we use in CI too). However, you could try +<code>poetry build</code> too.</p> +<h2 id="handle-a-dependabot-pull-request"><a class="header" href="#handle-a-dependabot-pull-request">...handle a Dependabot pull request?</a></h2> +<p>Synapse uses Dependabot to keep the <code>poetry.lock</code> and <code>Cargo.lock</code> file +up-to-date with the latest releases of our dependencies. The changelog check is +omitted for Dependabot PRs; the release script will include them in the +changelog.</p> +<p>When reviewing a dependabot PR, ensure that:</p> +<ul> +<li>the lockfile changes look reasonable;</li> +<li>the upstream changelog file (linked in the description) doesn't include any +breaking changes;</li> +<li>continuous integration passes.</li> +</ul> +<p>In particular, any updates to the type hints (usually packages which start with <code>types-</code>) +should be safe to merge if linting passes.</p> +<h1 id="troubleshooting"><a class="header" href="#troubleshooting">Troubleshooting</a></h1> +<h2 id="check-the-version-of-poetry-with-poetry---version"><a class="header" href="#check-the-version-of-poetry-with-poetry---version">Check the version of poetry with <code>poetry --version</code>.</a></h2> +<p>The minimum version of poetry supported by Synapse is 1.3.2.</p> +<p>It can also be useful to check the version of <code>poetry-core</code> in use. If you've +installed <code>poetry</code> with <code>pipx</code>, try <code>pipx runpip poetry list | grep poetry-core</code>.</p> +<h2 id="clear-caches-poetry-cache-clear---all-pypi"><a class="header" href="#clear-caches-poetry-cache-clear---all-pypi">Clear caches: <code>poetry cache clear --all pypi</code>.</a></h2> +<p>Poetry caches a bunch of information about packages that isn't readily available +from PyPI. (This is what makes poetry seem slow when doing the first +<code>poetry install</code>.) Try <code>poetry cache list</code> and <code>poetry cache clear --all <name of cache></code> to see if that fixes things.</p> +<h2 id="remove-outdated-egg-info"><a class="header" href="#remove-outdated-egg-info">Remove outdated egg-info</a></h2> +<p>Delete the <code>matrix_synapse.egg-info/</code> directory from the root of your Synapse +install.</p> +<p>This stores some cached information about dependencies and often conflicts with +letting Poetry do the right thing.</p> +<h2 id="try---verbose-or---dry-run-arguments"><a class="header" href="#try---verbose-or---dry-run-arguments">Try <code>--verbose</code> or <code>--dry-run</code> arguments.</a></h2> +<p>Sometimes useful to see what poetry's internal logic is.</p> + + </main> + + <nav class="nav-wrapper" aria-label="Page navigation"> + <!-- Mobile navigation buttons --> + <a rel="prev" href="../development/experimental_features.html" class="mobile-nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left"> + <i class="fa fa-angle-left"></i> + </a> + <a rel="next" href="../development/synapse_architecture/cancellation.html" class="mobile-nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right"> + <i class="fa fa-angle-right"></i> + </a> + <div style="clear: both"></div> + </nav> + </div> + </div> + + <nav class="nav-wide-wrapper" aria-label="Page navigation"> + <a rel="prev" href="../development/experimental_features.html" class="nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left"> + <i class="fa fa-angle-left"></i> + </a> + <a rel="next" href="../development/synapse_architecture/cancellation.html" class="nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right"> + <i class="fa fa-angle-right"></i> + </a> + </nav> + + </div> + + <script type="text/javascript"> + window.playground_copyable = true; + </script> + <script src="../elasticlunr.min.js" type="text/javascript" charset="utf-8"></script> + <script src="../mark.min.js" type="text/javascript" charset="utf-8"></script> + <script src="../searcher.js" type="text/javascript" charset="utf-8"></script> + <script src="../clipboard.min.js" type="text/javascript" charset="utf-8"></script> + <script src="../highlight.js" type="text/javascript" charset="utf-8"></script> + <script src="../book.js" type="text/javascript" charset="utf-8"></script> + + <!-- Custom JS scripts --> + <script type="text/javascript" src="../docs/website_files/table-of-contents.js"></script> + <script type="text/javascript" src="../docs/website_files/version-picker.js"></script> + <script type="text/javascript" src="../docs/website_files/version.js"></script> + </body> +</html> |