Git mirror from one remote server to another through local or readonly mirror using Nginx

dumb_http_git.sh

sudo docker run --name gitmir -v $PWD:/usr/share/nginx/html:ro nginx

mirror_repo.sh

# from remote server to local for dumb http server
if [ "$#" -ne 0 ] && [ "$#" -ne 1 ]; then
  echo "Invalid number of arguments."
  echo "Usage: $0 [source_repo_url mirror_repo_url]"
  exit 1
fi

if [ "$#" -eq 1 ]; then
	git clone --mirror $1 && \
	cd "$(basename "$_" .git).git" && \
	for ref in $(git for-each-ref --format='%(refname)' refs/pull/); do \
		git update-ref -d $ref; \
	done \
else
	git fetch origin '+refs/heads/*:refs/heads/*' '+refs/tags/*:refs/tags/*'; \
fi && \
git update-server-info

mirror_repo_to_server.sh

# from one remote server to another through local
if [ "$#" -ne 0 ] && [ "$#" -ne 2 ]; then
  echo "Invalid number of arguments."
  echo "Usage: $0 [source_repo_url mirror_repo_url]"
  exit 1
fi

if [ "$#" -eq 2 ]; then
	git clone --mirror $1 && \
	cd "$(basename "$_" .git).git" && \
	git remote add mirror $2 && \
	for ref in $(git for-each-ref --format='%(refname)' refs/pull/); do \
		git update-ref -d $ref; \
	done \
else
	git fetch origin '+refs/heads/*:refs/heads/*' '+refs/tags/*:refs/tags/*'; \
fi && \
git push mirror 'refs/heads/*' 'refs/tags/*'

update_all.sh

# to update all mirrors in working dir
for d in *.git; do
	echo $d && \
	cd $d && \
	../mirror_repo.sh && \
	cd ..
done