ddcf092678
This limits the file watch listener to only attach once and not on every render which is unnecessary.
48 lines
1.6 KiB
TypeScript
48 lines
1.6 KiB
TypeScript
/*
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* This file is part of Cockpit.
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*
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* Copyright (C) 2017 Red Hat, Inc.
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*
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* Cockpit is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* Cockpit is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Cockpit; If not, see <http://www.gnu.org/licenses/>.
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*/
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import React, { useEffect, useState } from 'react';
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import { Alert } from "@patternfly/react-core/dist/esm/components/Alert/index.js";
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import { Card, CardBody, CardTitle } from "@patternfly/react-core/dist/esm/components/Card/index.js";
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import cockpit from 'cockpit';
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const _ = cockpit.gettext;
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export const Application = () => {
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const [hostname, setHostname] = useState(_("Unknown"));
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useEffect(() => {
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const hostname = cockpit.file('/etc/hostname');
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hostname.watch(content => setHostname(content?.trim() ?? ""));
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return hostname.close;
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}, []);
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return (
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<Card>
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<CardTitle>Starter Kit</CardTitle>
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<CardBody>
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<Alert
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variant="info"
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title={ cockpit.format(_("Running on $0"), hostname) }
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/>
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</CardBody>
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</Card>
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);
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};
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