Introduction.

cms-bot started as a single script used to drive PR approval and grew to be the core of the whole release engineering process for CMSSW.

Setup

To have it working you'll need a ~/.github-token which can access the cms-sw organization.

Release integration

• process-pull-request.py: this is the script which updates the status of a CMSSW PR. It parses all the messages associated to the specified PR and if it spots a transition (e.g. a L2 signature) it posts a message acknowledging what happended, updates the tags etc. The state of the PR is fully obtained by parsing all the comments, so that we do not have to maintain our own state tracking DB.
• watchers.yaml: contains all the information required by process-pull-requests.py to notify developers when a PR touches the packages they watch.

Release building

• process-build-release-request.py
• [release-build](): script used to build a release which has been requested through a Github issue.
• [upload-release](): script used to upload a release to the repository. When the job processing build requests spots a request to upload, it SSH to the build machine which has the release and executes this script.
• config.map: semicolon separated key=value pairs formatted file with release queue related information. Each line represent a release queue. In particular CMSDIST_TAG is used to point to the CMSDIST tag to be used by the release building process.

Logging

Logging happens at many different level but we are trying to unify things using Elasticsearch for "live" data from which we dump precomputed views on a basis.

• es-templates: contains the templates for the logged dataes-templates.
• es-cleanup-indexes.py: cleanups old indexes in elasticsearch.

Code style

This project uses Black to ensure uniform code style. The following options are used:

--line-length 99 --target-version py36 --target-version py37 --target-version py38 --target-version py39 --target-version py310 --target-version py311

Ignoring formatting commits

We record commits containing only code-style changes in .git-blame-ignore-revs file. Use the following command on your local copy of this repository to exculse these commits from git blame:

$ git config blame.ignoreRevsFile .git-blame-ignore-revs