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@PurpleBooth PurpleBooth/README.md

Last active Jul 12, 2020
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What would you like to do?
Change your default branch on github without checkout anything out

change-github-default-branch.sh

Usage

change-github-default-branch.sh "$GITHUB_TOKEN" PurpleBooth/homebrew-repo

Does not delete the old default branch, or change where pull requests are based from, incase something breaks.

Thanks mfcrocker for ubuntu fixes.

#!/usr/bin/env bash
set -euo pipefail
if [ $# -ne 3 ] && [ $# -ne 2 ]; then
echo "USAGE: $0 pat_token user/repo [new_default]" 1>&2
echo
printf "pat_token\tA GitHub personal access with at least repo:public_repo, or repo on private repositores https://github.com/settings/tokens/new\n"
printf "user/repo\tA github repository, for example purplebooth/readable-name-generator\n"
printf "new_default\tName of the new default branch, default: main\n"
exit 1
fi
GITHUB_TOKEN="$1"
REPO="$2"
DEFAULT_BRANCH_NAME="${3:-main}"
LATEST_SHA="$(
curl \
--silent \
-X GET \
--header "Authorization: token $GITHUB_TOKEN" \
--location \
--output - \
"https://api.github.com/repos/$REPO/git/refs/heads" |
python -c 'import sys, json; print(json.load(sys.stdin)[0]["object"]["sha"])'
)"
curl \
--silent \
-X POST \
--header "Authorization: token $GITHUB_TOKEN" \
--header "Content-Type: application/json" \
-d "{ \"ref\": \"refs/heads/$DEFAULT_BRANCH_NAME\", \"sha\": \"$LATEST_SHA\" }" \
"https://api.github.com/repos/$REPO/git/refs"
curl \
--silent \
-X PATCH \
--header "Authorization: token $GITHUB_TOKEN" \
--header "Content-Type: application/json" \
--data "{\"default_branch\": \"$DEFAULT_BRANCH_NAME\" }" \
"https://api.github.com/repos/$REPO"
@PurpleBooth

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PurpleBooth commented Jun 13, 2020

It's on my GH if you spot any problems! PurpleBooth/change-github-default-branch.sh, I'll probably stick updates there

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