Move `master` branch to `main`

[jennybc]

The master branch of this repository will soon be renamed to main, as part of a coordinated change across several GitHub organizations (including, but not limited to: tidyverse, r-lib, tidymodels, and sol-eng). We anticipate this will happen by the end of September 2021.

That will be preceded by a release of the usethis package, which will gain some functionality around detecting and adapting to a renamed default branch. There will also be a blog post at the time of this master --> main change.

The purpose of this issue is to:

• Help us firm up the list of targetted repositories
• Make sure all maintainers are aware of what's coming
• Give us an issue to close when the job is done
• Give us a place to put advice for collaborators re: how to adapt

message id: euphoric_snowdog

[jennybc]

I have moved the default branch from master to main here (and elsewhere)!

When I ran usethis::git_default_branch_rename(), I saw this output, which might require some follow-up:

✓ Default branch of the source repo 'tidyverse/hms' has moved: 'master' --> 'main'
• Be sure to update files that refer to the default branch by name.
  Consider searching within your project for 'master'.
x These GitHub Action files don't mention the new default branch 'main':
  - '.github/workflows/R-CMD-check-dev.yaml'
  - '.github/workflows/revdep.yaml'
x Some badges may refer to the old default branch 'master':
  - 'README.Rmd'
✓ Default branch of local repo has moved: 'master' --> 'main'

As a result, I won't close this issue, but rest assured that the default branch has been renamed.

This blog post announces the larger effort and explains how contributors can update their local environments:

Renaming the default branch

Here's the TL;DR:

1. Update usethis (you want usethis v2.1.2 or higher):

   install.packages("usethis")

2. Anyone with an existing fork or clone can adjust to the renamed default branch with:

   usethis::git_default_branch_rediscover()

   If you wish, you can read the documentation for git_default_branch_rediscover(). Or do the command line equivalent (see the blog post).

message id: goofy_chipmunk

[krlmlr]

Done now.

[github-actions[bot]]

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