#!/bin/sh

. $(dirname $0)/adc.common-functions

[ $# -eq 2 ] || die "usage: $0 <repo> <branch>"

if [ $SDB_WRITER_ALLOWED ]; then
  # this will check only for write permission on the given repository
  get_rights_and_owner $1 # this also set $repo variable
  [ -z "$perm_write" ] && die "You don't have write permission on $repo"
else
  # require a repository creator to change default branch
  valid_owned_repo $1
fi

# move to repo dir
cd "$GL_REPO_BASE_ABS/$repo.git"

# check for branch existence
match=`git branch | sed 's/^( |*) //' | grep $2`
# this will check for an exact match in branch name
[ "$2" = "$match" ] || die "Unable to find branch $2 in repository $repo"

# update the default checked out branch
git symbolic-ref HEAD refs/heads/$match

echo "Head branch for repository $1 updated to $2"