Automatically trigger a test mypyc build on master commits (python#5672)

We want to automatically build mypyc-compiled mypy wheels for mypy master commits. To do this, we use a separate github repo that has mypy and mypyc as submodules and which automatically builds wheel images and uploads them as github release artifacts. Currently, for testing purposes, the target repo is https://github.com/msullivan/travis-testing. Obviously this will need to be something else later. The push is done as the `mypy-build-bot` github user, and I configured travis with an API token for that account as the `$WHEELS_PUSH_TOKEN` environment variable.
hackdefendr · Sep 26, 2018 · 83820a0 · 83820a0
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diff --git a/.travis.yml b/.travis.yml
@@ -36,6 +36,10 @@ jobs:
     env:
     - TOXENV=lint
     - EXTRA_ARGS=
+  - name: "trigger a build of wheels"
+    stage: deploy
+    python: 3.7
+    script: if [[ $TRAVIS_BRANCH = "master" && $TRAVIS_PULL_REQUEST = "false" ]]; then ./misc/trigger_wheel_build.sh; fi
 
 install:
 - pip install -U pip setuptools

diff --git a/misc/trigger_wheel_build.sh b/misc/trigger_wheel_build.sh
@@ -0,0 +1,24 @@
+#!/bin/bash -eux
+
+# Trigger a build of mypyc compiled mypy wheels by updating the mypy
+# submodule in the git repo that drives those builds.
+
+# TODO: This is a testing repo and will need to be retargeted at the
+# real location once it exists. $WHEELS_PUSH_TOKEN is stored in travis
+# and is an API token for the mypy-build-bot account.
+git clone --recurse-submodules https://${WHEELS_PUSH_TOKEN}@github.com/msullivan/travis-testing.git build
+
+git config --global user.email "nobody"
+git config --global user.name "mypy wheels autopush"
+
+COMMIT=$(git rev-parse HEAD)
+cd build/mypy
+git fetch
+git checkout $COMMIT
+pip install -r test-requirements.txt
+V=$(python3 -m mypy --version)
+V=$(echo "$V" | cut -d" " -f2)
+cd ..
+git commit -am "Build wheels for mypy $V"
+git tag v$V
+git push --tags origin master