formatting, parameterising, add user safety check

update

@@ -2,19 +2,34 @@
 
 set -e
 
-echo "cloning ..."
+web_user="www-data"
+user="willipink"
+path="/home/willipink/coinmanager"
+
+if [[ "$USER" != "$user" ]]; then
+    echo "You must be '$user' to run this file."
+    exit 1
+fi
+
+cd $path/coinmanager
+
+echo -n "fetching "
 git pull -q origin master >/dev/null
+echo "..."
 
-echo "collecting ..."
-cd /home/willipink/coinmanager/coinmanager
+echo -n "collecting "
 pipenv run python manage.py collectstatic --settings coinmanager.production_settings --no-input >/dev/null
+echo "..."
 
-echo "bumping ..."
+echo -n "bumping "
 version=$(date +"%y%m%d")
-sed -i "s/[0-9]\{6\}/$version/g" coinc/templates/footer.html
+sed -i "s/[0-9]\{6\}/$version/g" coinc/templates/footer.html >/dev/null
+echo "..."
 
-echo "owning ..."
-sudo chown -R willipink:www-data /home/willipink/coinmanager >/dev/null
+echo -n "owning "
+sudo chown -R $user:$web_user $path >/dev/null
+echo "..."
 
-echo "reloading ..."
+echo -n "reloading "
 sudo systemctl reload apache2 >/dev/null
+echo "..."