Merge tag 'v0.33.7' into dinsic

**Warning**: This release removes the example email notification templates from
`res/templates` (they are now internal to the python package). This should only
affect you if you (a) deploy your Synapse instance from a git checkout or a
github snapshot URL, and (b) have email notifications enabled.

If you have email notifications enabled, you should ensure that
`email.template_dir` is either configured to point at a directory where you
have installed customised templates, or leave it unset to use the default
templates.

The configuration parser will try to detect the situation where
`email.template_dir` is incorrectly set to `res/templates` and do the right
thing, but will warn about this.

Features
--------

- Ship the example email templates as part of the package ([\#4052](#4052))
- Add support for end-to-end key backup (MSC1687) ([\#4019](#4019))

Bugfixes
--------

- Fix bug which made get_missing_events return too few events ([\#4045](#4045))
- Fix bug in event persistence logic which caused 'NoneType is not iterable' ([\#3995](#3995))
- Fix exception in background metrics collection ([\#3996](#3996))
- Fix exception handling in fetching remote profiles ([\#3997](#3997))
- Fix handling of rejected threepid invites ([\#3999](#3999))
- Workers now start on Python 3. ([\#4027](#4027))
- Synapse now starts on Python 3.7. ([\#4033](#4033))

Internal Changes
----------------

- Log exceptions in looping calls ([\#4008](#4008))
- Optimisation for serving federation requests ([\#4017](#4017))
- Add metric to count number of non-empty sync responses ([\#4022](#4022))

Author: michaelkaye

.circleci/config.yml

@@ -0,0 +1,165 @@
+version: 2
+jobs:
+  dockerhubuploadrelease:
+    machine: true
+    steps:
+      - checkout
+      - run: docker build -f docker/Dockerfile -t matrixdotorg/synapse:${CIRCLE_TAG} .
+      - run: docker build -f docker/Dockerfile -t matrixdotorg/synapse:${CIRCLE_TAG}-py3 --build-arg PYTHON_VERSION=3.6 .
+      - run: docker login --username $DOCKER_HUB_USERNAME --password $DOCKER_HUB_PASSWORD
+      - run: docker push matrixdotorg/synapse:${CIRCLE_TAG}
+      - run: docker push matrixdotorg/synapse:${CIRCLE_TAG}-py3
+  dockerhubuploadlatest:
+    machine: true
+    steps:
+      - checkout
+      - run: docker build -f docker/Dockerfile -t matrixdotorg/synapse:${CIRCLE_SHA1} .
+      - run: docker build -f docker/Dockerfile -t matrixdotorg/synapse:${CIRCLE_SHA1}-py3 --build-arg PYTHON_VERSION=3.6 .
+      - run: docker login --username $DOCKER_HUB_USERNAME --password $DOCKER_HUB_PASSWORD
+      - run: docker tag matrixdotorg/synapse:${CIRCLE_SHA1} matrixdotorg/synapse:latest
+      - run: docker tag matrixdotorg/synapse:${CIRCLE_SHA1}-py3 matrixdotorg/synapse:latest-py3
+      - run: docker push matrixdotorg/synapse:${CIRCLE_SHA1}
+      - run: docker push matrixdotorg/synapse:${CIRCLE_SHA1}-py3
+      - run: docker push matrixdotorg/synapse:latest
+      - run: docker push matrixdotorg/synapse:latest-py3
+  sytestpy2:
+    machine: true
+    steps:
+      - checkout
+      - run: docker pull matrixdotorg/sytest-synapsepy2
+      - run: docker run --rm -it -v $(pwd)\:/src -v $(pwd)/logs\:/logs matrixdotorg/sytest-synapsepy2
+      - store_artifacts:
+          path: ~/project/logs
+          destination: logs
+      - store_test_results:
+          path: logs
+  sytestpy2postgres:
+    machine: true
+    steps:
+      - checkout
+      - run: docker pull matrixdotorg/sytest-synapsepy2
+      - run: docker run --rm -it -v $(pwd)\:/src -v $(pwd)/logs\:/logs -e POSTGRES=1 matrixdotorg/sytest-synapsepy2
+      - store_artifacts:
+          path: ~/project/logs
+          destination: logs
+      - store_test_results:
+          path: logs
+  sytestpy2merged:
+    machine: true
+    steps:
+      - checkout
+      - run: bash .circleci/merge_base_branch.sh
+      - run: docker pull matrixdotorg/sytest-synapsepy2
+      - run: docker run --rm -it -v $(pwd)\:/src -v $(pwd)/logs\:/logs matrixdotorg/sytest-synapsepy2
+      - store_artifacts:
+          path: ~/project/logs
+          destination: logs
+      - store_test_results:
+          path: logs
+
+  sytestpy2postgresmerged:
+    machine: true
+    steps:
+      - checkout
+      - run: bash .circleci/merge_base_branch.sh
+      - run: docker pull matrixdotorg/sytest-synapsepy2
+      - run: docker run --rm -it -v $(pwd)\:/src -v $(pwd)/logs\:/logs -e POSTGRES=1 matrixdotorg/sytest-synapsepy2
+      - store_artifacts:
+          path: ~/project/logs
+          destination: logs
+      - store_test_results:
+          path: logs
+
+  sytestpy3:
+    machine: true
+    steps:
+      - checkout
+      - run: docker pull matrixdotorg/sytest-synapsepy3
+      - run: docker run --rm -it -v $(pwd)\:/src -v $(pwd)/logs\:/logs matrixdotorg/sytest-synapsepy3
+      - store_artifacts:
+          path: ~/project/logs
+          destination: logs
+      - store_test_results:
+          path: logs
+  sytestpy3postgres:
+    machine: true
+    steps:
+      - checkout
+      - run: docker pull matrixdotorg/sytest-synapsepy3
+      - run: docker run --rm -it -v $(pwd)\:/src -v $(pwd)/logs\:/logs -e POSTGRES=1 matrixdotorg/sytest-synapsepy3
+      - store_artifacts:
+          path: ~/project/logs
+          destination: logs
+      - store_test_results:
+          path: logs
+  sytestpy3merged:
+    machine: true
+    steps:
+      - checkout
+      - run: bash .circleci/merge_base_branch.sh
+      - run: docker pull matrixdotorg/sytest-synapsepy3
+      - run: docker run --rm -it -v $(pwd)\:/src -v $(pwd)/logs\:/logs matrixdotorg/sytest-synapsepy3
+      - store_artifacts:
+          path: ~/project/logs
+          destination: logs
+      - store_test_results:
+          path: logs
+  sytestpy3postgresmerged:
+    machine: true
+    steps:
+      - checkout
+      - run: bash .circleci/merge_base_branch.sh
+      - run: docker pull matrixdotorg/sytest-synapsepy3
+      - run: docker run --rm -it -v $(pwd)\:/src -v $(pwd)/logs\:/logs -e POSTGRES=1 matrixdotorg/sytest-synapsepy3
+      - store_artifacts:
+          path: ~/project/logs
+          destination: logs
+      - store_test_results:
+          path: logs
+
+workflows:
+  version: 2
+  build:
+    jobs:
+      - sytestpy2:
+          filters:
+            branches:
+              only: /develop|master|release-.*/
+      - sytestpy2postgres:
+          filters:
+            branches:
+              only: /develop|master|release-.*/
+      - sytestpy3:
+          filters:
+            branches:
+              only: /develop|master|release-.*/
+      - sytestpy3postgres:
+          filters:
+            branches:
+              only: /develop|master|release-.*/
+      - sytestpy2merged:
+          filters:
+            branches:
+              ignore: /develop|master|release-.*/
+      - sytestpy2postgresmerged:
+          filters:
+            branches:
+              ignore: /develop|master|release-.*/
+      - sytestpy3merged:
+          filters:
+            branches:
+              ignore: /develop|master|release-.*/
+      - sytestpy3postgresmerged:
+          filters:
+            branches:
+              ignore: /develop|master|release-.*/
+      - dockerhubuploadrelease:
+          filters:
+            tags:
+              only: /v[0-9].[0-9]+.[0-9]+.*/
+            branches:
+              ignore: /.*/
+      - dockerhubuploadlatest:
+          filters:
+            branches:
+              only: master

.circleci/merge_base_branch.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+
+set -e
+
+# CircleCI doesn't give CIRCLE_PR_NUMBER in the environment for non-forked PRs. Wonderful.
+# In this case, we just need to do some ~shell magic~ to strip it out of the PULL_REQUEST URL.
+echo 'export CIRCLE_PR_NUMBER="${CIRCLE_PR_NUMBER:-${CIRCLE_PULL_REQUEST##*/}}"' >> $BASH_ENV
+source $BASH_ENV
+
+if [[ -z "${CIRCLE_PR_NUMBER}" ]]
+then
+    echo "Can't figure out what the PR number is! Assuming merge target is develop."
+
+    # It probably hasn't had a PR opened yet. Since all PRs land on develop, we
+    # can probably assume it's based on it and will be merged into it.
+    GITBASE="develop"
+else
+    # Get the reference, using the GitHub API
+    GITBASE=`curl -q https://api.github.com/repos/matrix-org/synapse/pulls/${CIRCLE_PR_NUMBER} | jq -r '.base.ref'`
+fi
+
+# Show what we are before
+git show -s
+
+# Set up username so it can do a merge
+git config --global user.email bot@matrix.org
+git config --global user.name "A robot"
+
+# Fetch and merge. If it doesn't work, it will raise due to set -e.
+git fetch -u origin $GITBASE
+git merge --no-edit origin/$GITBASE
+
+# Show what we are after.
+git show -s