#!/bin/bash

if [ -z "$GIT_ORIGIN" ] || [ -z "$GIT_UPSTREAM" ] || [ -z "$GIT_BRANCH" ] || [ -z "$GIT_NAME" ] || [ -z "$GIT_EMAIL" ] || [ -z "$GIT_USER" ] || [ -z "$GIT_PASS" ]; then
    echo "Environment variables not set"
    exit 1
fi

git config --global user.name "$GIT_NAME"
git config --global user.email "$GIT_EMAIL"

PLAIN_URL=$(echo "$GIT_ORIGIN" | sed 's/https:\/\///')
AUTH_URL="https://$GIT_USER:$GIT_PASS@$PLAIN_URL"

WORKDIR="./git"
mkdir -p "$WORKDIR"

if [ ! -d "$WORKDIR/.git" ]; then
    echo "Cloning repo"
    git clone "$AUTH_URL" "$WORKDIR"
fi

cd "$WORKDIR"

if [ -z "$(git remote | grep origin)" ]; then
    git remote add origin "$GIT_ORIGIN"
elif [ "$(git config --get remote.origin.url)" != "$GIT_ORIGIN" ]; then
    git remote set-url origin "$GIT_ORIGIN"
fi

if [ -z "$(git remote | grep upstream)" ]; then
    git remote add upstream "$GIT_UPSTREAM"
elif [ "$(git config --get remote.upstream.url)" != "$GIT_UPSTREAM" ]; then
    git remote set-url upstream "$GIT_UPSTREAM"
fi

git fetch origin
git fetch upstream
git pull origin "$GIT_BRANCH"
git checkout "$GIT_BRANCH"
git merge upstream/"$GIT_BRANCH" --no-edit
git push $AUTH_URL "$GIT_BRANCH"