gitlab2github/gitlab2github.sh at main · radu-matei1enciu/gitlab2github · GitHub

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#!/bin/bash
set -euo pipefail
umask 077

install_gh() {
	(type -p wget >/dev/null || (sudo apt update && sudo apt install wget -y)) \
	&& sudo mkdir -p -m 755 /etc/apt/keyrings \
	&& out=$(mktemp) && wget -nv -O$out https://cli.github.com/packages/githubcli-archive-keyring.gpg \
	&& cat $out | sudo tee /etc/apt/keyrings/githubcli-archive-keyring.gpg > /dev/null \
	&& sudo chmod go+r /etc/apt/keyrings/githubcli-archive-keyring.gpg \
	&& sudo mkdir -p -m 755 /etc/apt/sources.list.d \
	&& echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/githubcli-archive-keyring.gpg] https://cli.github.com/packages stable main" | sudo tee /etc/apt/sources.list.d/github-cli.list > /dev/null \
	&& sudo apt update \
	&& sudo apt install gh -y
}

install_git() {
	sudo apt update && sudo apt install git
}

check_tool() {
	# Source - https://stackoverflow.com/a/677212
	# Posted by lhunath, modified by community. See post 'Timeline' for change history
	# Retrieved 2026-08-31, License - CC BY-SA 4.0
	command -v $1 >/dev/null 2>&1 || { echo >&2 "I require $1 but it's not installed. I will install it for the user";  install_$1; }
}

# Check if user is root, if not ask him to run the script with sudo
if ! [ $(id -u) = 0 ]; then
	   echo "You must be root to run this script, use 'sudo ./gitlab2github.sh'"
	   exit 1
fi

# Check if all tools necesarry are available, if not install them for the user.
check_tool git
check_tool gh

# Source - https://stackoverflow.com/q/638975
# Posted by Bill the Lizard, modified by community. See post 'Timeline' for change history
# Retrieved 2026-08-31, License - CC BY-SA 4.0

# Check if environment file with credentials exists
ENV_FILE=./.env
if [ -f $ENV_FILE ]; then
	source $ENV_FILE
else
	echo "File $ENV_FILE does not exist. Please create it using the instructions"
	exit 1
fi

# Check if csv file with repos exists
CSV_FILE=repos.csv
if [ ! -f $CSV_FILE ]; then
	echo "File $CSV_FILE does not exist. Please create it using the instructions"
	exit 1
fi

gh auth setup-git

# Loop over the projects
while IFS="," read -r OLD_REPO NEW_REPO
do

	REPO_NO_SCHEME="${OLD_REPO#https://}"

	CLONE_URL="https://${GITLAB_USERNAME}:${GITLAB_TOKEN}@${REPO_NO_SCHEME}"

	REPO_NAME="$(basename "$REPO_NO_SCHEME" .git)"

	echo "Cloning $OLD_REPO ..."
	if ! git clone "$CLONE_URL"; then
		echo "Failed to clone $OLD_REPO, skipping."
		continue
	fi

	cd "$REPO_NAME"

	echo "Creating GitHub repo $NEW_REPO and pushing $REPO_NAME into it..."
	if ! gh repo create "$NEW_REPO" --private --source=. --remote=github --push; then
		echo "Failed to create/push $NEW_REPO, skipping."
		cd "$BASE_DIR"
		continue
	fi

	git push github --all
	git push github --tags

	cd ..
	sudo rm -rf $REPO_NAME

done < <(tail -n +2 $CSV_FILE)