Rename repositories branches from master to main

[marcoieni]

Many teams want to rename their repos from master to main.

Here's an incomplete list of repositories we want to rename:

• rust #t-infra > Renaming the master branch for rust-lang/rust
• simpleinfra
• infra-team Rename master to main #228
• rustup Move the default branch from master to main rustup#4511
• team rename default branch to main team#2034
• ...

How to

Here's the procedure for renaming the branch (things need to be done in this order):

1. Change the branch name in the GitHub settings of the repo
2. Update "Deployment branches and tags" restrictions in GitHub environments settings.
3. Update CI roles (e.g. update ci role rustup branch simpleinfra#796)
4. Change the CI workflows and other references to the master branch (e.g. Move the default branch from master to main rustup#4511)
5. Change the team repo references to the master branch (e.g. Rename default branch of rustup to main team#2010)

Related

• zulip: Renaming default branches from master to main