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-rw-r--r--CHANGES.md23
-rw-r--r--INSTALL.md3
-rw-r--r--README.rst11
-rw-r--r--changelog.d/9720.misc1
-rw-r--r--changelog.d/9734.misc1
-rw-r--r--debian/changelog6
-rw-r--r--docs/deprecation_policy.md33
-rw-r--r--synapse/__init__.py2
8 files changed, 72 insertions, 8 deletions
diff --git a/CHANGES.md b/CHANGES.md
index ff84a556ad..27483532d0 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,10 +1,27 @@
-Synapse 1.31.0rc1 (2021-03-30)
-==============================
+Synapse 1.31.0 (2021-04-06)
+===========================
 
-**Note:** As announced in v1.25.0, and in line with the deprecation policy for platform dependencies, this is the last release to support Python 3.5 and PostgreSQL 9.5. Future versions of Synapse will require Python 3.6+ and PostgreSQL 9.6+.
+**Note:** As announced in v1.25.0, and in line with the deprecation policy for platform dependencies, this is the last release to support Python 3.5 and PostgreSQL 9.5. Future versions of Synapse will require Python 3.6+ and PostgreSQL 9.6+, as per our [deprecation policy](docs/deprecation_policy.md).
 
 This is also the last release that the Synapse team will be publishing packages for Debian Stretch and Ubuntu Xenial.
 
+
+Improved Documentation
+----------------------
+
+- Add a document describing the deprecation policy for platform dependencies. ([\#9723](https://github.com/matrix-org/synapse/issues/9723))
+
+
+Internal Changes
+----------------
+
+- Revert using `dmypy run` in lint script. ([\#9720](https://github.com/matrix-org/synapse/issues/9720))
+- Pin flake8-bugbear's version. ([\#9734](https://github.com/matrix-org/synapse/issues/9734))
+
+
+Synapse 1.31.0rc1 (2021-03-30)
+==============================
+
 Features
 --------
 
diff --git a/INSTALL.md b/INSTALL.md
index 808243719e..7b40689234 100644
--- a/INSTALL.md
+++ b/INSTALL.md
@@ -38,6 +38,7 @@ There are 3 steps to follow under **Installation Instructions**.
     - [URL previews](#url-previews)
     - [Troubleshooting Installation](#troubleshooting-installation)
 
+
 ## Choosing your server name
 
 It is important to choose the name for your server before you install Synapse,
@@ -542,7 +543,7 @@ Alternatively, you can do so from the command line. This can be done as follows:
     register_new_matrix_user -c homeserver.yaml http://localhost:8008
     ```
 
-This will prompt you to add details for the new user, and will then connect to 
+This will prompt you to add details for the new user, and will then connect to
 the running Synapse to create the new user. For example:
 ```
 New user localpart: erikj
diff --git a/README.rst b/README.rst
index 6a1e713590..655a2bf3be 100644
--- a/README.rst
+++ b/README.rst
@@ -314,6 +314,15 @@ Testing with SyTest is recommended for verifying that changes related to the
 Client-Server API are functioning correctly. See the `installation instructions
 <https://github.com/matrix-org/sytest#installing>`_ for details.
 
+
+Platform dependencies
+=====================
+
+Synapse uses a number of platform dependencies such as Python and PostgreSQL,
+and aims to follow supported upstream versions. See the
+`<docs/deprecation_policy.md>`_ document for more details.
+
+
 Troubleshooting
 ===============
 
@@ -389,7 +398,7 @@ likely cause. The misbehavior can be worked around by setting
 People can't accept room invitations from me
 --------------------------------------------
 
-The typical failure mode here is that you send an invitation to someone 
+The typical failure mode here is that you send an invitation to someone
 to join a room or direct chat, but when they go to accept it, they get an
 error (typically along the lines of "Invalid signature"). They might see
 something like the following in their logs::
diff --git a/changelog.d/9720.misc b/changelog.d/9720.misc
deleted file mode 100644
index 9dd0bc9cff..0000000000
--- a/changelog.d/9720.misc
+++ /dev/null
@@ -1 +0,0 @@
-Revert using `dmypy run` in lint script.
diff --git a/changelog.d/9734.misc b/changelog.d/9734.misc
deleted file mode 100644
index 20ed9a06a9..0000000000
--- a/changelog.d/9734.misc
+++ /dev/null
@@ -1 +0,0 @@
-Pin flake8-bugbear's version.
\ No newline at end of file
diff --git a/debian/changelog b/debian/changelog
index 18dc04cd82..09602ff54b 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+matrix-synapse-py3 (1.31.0) stable; urgency=medium
+
+  * New synapse release 1.31.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 06 Apr 2021 13:08:29 +0100
+
 matrix-synapse-py3 (1.30.1) stable; urgency=medium
 
   * New synapse release 1.30.1.
diff --git a/docs/deprecation_policy.md b/docs/deprecation_policy.md
new file mode 100644
index 0000000000..06ea340559
--- /dev/null
+++ b/docs/deprecation_policy.md
@@ -0,0 +1,33 @@
+Deprecation Policy for Platform Dependencies
+============================================
+
+Synapse has a number of platform dependencies, including Python and PostgreSQL.
+This document outlines the policy towards which versions we support, and when we
+drop support for versions in the future.
+
+
+Policy
+------
+
+Synapse follows the upstream support life cycles for Python and PostgreSQL,
+i.e. when a version reaches End of Life Synapse will withdraw support for that
+version in future releases.
+
+Details on the upstream support life cycles for Python and PostgreSQL are
+documented at https://endoflife.date/python and
+https://endoflife.date/postgresql.
+
+
+Context
+-------
+
+It is important for system admins to have a clear understanding of the platform
+requirements of Synapse and its deprecation policies so that they can
+effectively plan upgrading their infrastructure ahead of time. This is
+especially important in contexts where upgrading the infrastructure requires
+auditing and approval from a security team, or where otherwise upgrading is a
+long process.
+
+By following the upstream support life cycles Synapse can ensure that its
+dependencies continue to get security patches, while not requiring system admins
+to constantly update their platform dependencies to the latest versions.
diff --git a/synapse/__init__.py b/synapse/__init__.py
index 419299bf01..1d2883acf6 100644
--- a/synapse/__init__.py
+++ b/synapse/__init__.py
@@ -48,7 +48,7 @@ try:
 except ImportError:
     pass
 
-__version__ = "1.31.0rc1"
+__version__ = "1.31.0"
 
 if bool(os.environ.get("SYNAPSE_TEST_PATCH_LOG_CONTEXTS", False)):
     # We import here so that we don't have to install a bunch of deps when