#!/bin/sh
# ref: https://help.github.com/articles/adding-an-existing-project-to-github-using-the-command-line/
#
# Usage example: /bin/sh ./git_push.sh wing328 openapi-petstore-perl "minor update" "gitlab.com"

git_user_id=$1
git_repo_id=$2
release_note=$3
git_host=$4

if [ -z "${git_host}" ]; then
    git_host="github.com"
    echo "[INFO] No command line input provided. Set \${git_host} to ${git_host}"
fi

if [ -z "${git_user_id}" ]; then
    git_user_id="GIT_USER_ID"
    echo "[INFO] No command line input provided. Set \${git_user_id} to ${git_user_id}"
fi

if [ -z "${git_repo_id}" ]; then
    git_repo_id="GIT_REPO_ID"
    echo "[INFO] No command line input provided. Set \${git_repo_id} to ${git_repo_id}"
fi

if [ -z "${release_note}" ]; then
    release_note="Minor update"
    echo "[INFO] No command line input provided. Set \${release_note} to ${release_note}"
fi

# Initialize the local directory as a Git repository
git init

# Adds the files in the local repository and stages them for commit.
git add .

# Commits the tracked changes and prepares them to be pushed to a remote repository.
git commit -m "${release_note}"

# Sets the new remote
if [ -z "$(git remote)" ]; then # git remote not defined
    if [ -z "${GIT_TOKEN:-}" ]; then
        echo "[INFO] \${GIT_TOKEN} (environment variable) is not set. Using the git credential in your environment."
        git remote add origin "https://${git_host}/${git_user_id}/${git_repo_id}.git"
    else
        git remote add origin "https://${git_user_id}:${GIT_TOKEN}@${git_host}/${git_user_id}/${git_repo_id}.git"
    fi
fi

git pull origin master

# Pushes (Forces) the changes in the local repository up to the remote repository
echo "Git pushing to https://${git_host}/${git_user_id}/${git_repo_id}.git"
git push origin master 2>&1 | grep -v 'To https'