Rename Git default branch to "main"

fix_branch_name.sh

#/usr/bin/env bash

# This is a script to automate changing the name of the
#   default branch of your git repository from "master"
#   to "main". Run it in the root directory of your local
#   clone.
#
# If you don't want to run this directly (and I wouldn't
#   blame you!) it can at least serve as a guide to what
#   you would want to do.
#
# Note that changing the default branch might mess things up
#   for collaborators or pull requests. I've only done this
#   in personal repos where I am the only contributor.
#   I make no promises for how it might affect your repo.
#
# If you don't care about updating a central host like
#   GitHub, then you only need the first two lines. Pretty easy!
#
# If you're using GitHub, it will also update the remote repo
#   to make it the new default branch there, but you need to
#   have their CLI client "hub" installed.
#   https://hub.github.com
#
# If you don't trust that process (and again, I wouldn't blame
#   you!) you can change the default branch manually at
#   https://github.com/{REPO_OWNER}/{REPO_NAME}/settings/branches
#
# If you're using another hosting service, I imagine that could
#   be easily automated, but I don't know how. If you do and feel
#   inclined to share, I'm happy to add that to this script.
#

git branch -m master main
git push -u origin main


# Now to fix up GitHub

# Check that you have "hub" installed. There are probably
#   other ways to do this, but this one is easy.
HUB=$(which hub)
if [[ $? -ne 0 ]]; then
  echo "You need to have the GitHub \"hub\" command installed."
  echo "https://hub.github.com/"
  exit 1
fi

# figure out the owner/reponame
repoURL=$($HUB browse --url)
parts=(${repoURL//\// })
repoOwner=${parts[2]}
repoName=${parts[3]}

# use the GitHub API to change the default branch
#   NB: assumes you have permissions to do so
$HUB api -X PATCH /repos/$repoOwner/$repoName --raw-field 'default_branch=main'

# gets rid of the old default
git push -d origin master

I still vote that the "integration" branch should be trunk 🐘 though.

😂