git-find-branch

#!/bin/sh

###
### This script has been moved to the git-scripts repository:
### https://github.com/plume-lib/git-scripts
###
echo "Please use $(basename "$0") from https://github.com/plume-lib/git-scripts ."
echo "You are using $0,"
echo "which is an obsolete version from https://github.com/plume-lib/plume-scripts ."

# Usage:  git-find-branch REPO_URL BRANCH ...
# Prints either the first BRANCH that exists in REPO_URL,
# or else prints the default branch name if none of the given branches exists.

# Often, you can use the `git-clone-related` script instead of this one.

REPO_URL=$1
shift

for BRANCH in "$@"; do
  if (git ls-remote --quiet --exit-code --heads "${REPO_URL}" "${BRANCH}" > /dev/null); then
    echo "${BRANCH}"
    exit 0
  fi
done

git ls-remote --symref "${REPO_URL}" HEAD | awk '/^ref:/ {sub(/refs\/heads\//, "", $2); print $2}'