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import React from 'dom-chef';
import select from 'select-dom';
import PencilIcon from 'octicon/pencil.svg';
import * as pageDetect from 'github-url-detection';
import features from '../libs/features';
import getDefaultBranch from '../libs/get-default-branch';
async function init(): Promise<void | false> {
const readmeHeader = select('#readme .Box-header h2');
if (!readmeHeader) {
return false;
}
const isPermalink = /Tag|Tree/.test(select('.branch-select-menu i')!.textContent!);
const filename = readmeHeader.textContent!.trim();
const pathnameParts = select<HTMLAnchorElement>(`.files [title="${filename}"]`)!.pathname.split('/');
pathnameParts[3] = 'edit'; // Replaces /blob/
if (isPermalink) {
pathnameParts[4] = await getDefaultBranch(); // Replaces /${tag|commit}/
}
// The button already exists on repos you can push to.
const existingButton = select<HTMLAnchorElement>('a[aria-label="Edit this file"]');
if (existingButton) {
if (isPermalink) {
// GitHub has a broken link in this case #2997
existingButton.href = pathnameParts.join('/');
}
return false;
}
readmeHeader.after(
<a
href={pathnameParts.join('/')}
className="Box-btn-octicon btn-octicon float-right"
aria-label="Edit this file"
>
<PencilIcon/>
</a>
);
}
features.add({
id: __filebasename,
description: 'Ensures that the “Edit readme” button always appears (even when you have to make a fork) and works (GitHub’s link does’t work on git tags).',
screenshot: 'https://user-images.githubusercontent.com/1402241/62073307-a8378880-b26a-11e9-9e31-be6525d989d2.png'
}, {
include: [
pageDetect.isRepoTree
],
init
});
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