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import React from 'dom-chef';
import elementReady from 'element-ready';
import * as pageDetect from 'github-url-detection';
import {ChevronLeftIcon} from '@primer/octicons-react';
import features from '.';
import GitHubURL from '../github-helpers/github-url';
import {groupButtons} from '../github-helpers/group-buttons';
import getDefaultBranch from '../github-helpers/get-default-branch';
import {getCurrentCommittish} from '../github-helpers';
async function init(): Promise<false | void> {
const defaultBranch = await getDefaultBranch();
const branchSelector = await elementReady('[data-hotkey="w"]');
// The branch selector is missing from History pages of files and folders (it only appears on the root)
if (!branchSelector) {
return false;
}
const currentBranch = getCurrentCommittish();
// Don't show the button if we’re already on the default branch
if (defaultBranch === currentBranch) {
return false;
}
const url = new GitHubURL(location.href);
if (pageDetect.isRepoRoot()) {
// The default branch of the root directory is just /user/repo/
url.route = '';
url.branch = '';
} else {
url.branch = defaultBranch;
}
const defaultLink = (
<a
className="btn tooltipped tooltipped-ne rgh-default-branch-button"
href={url.href}
data-pjax="#repo-content-pjax-container"
aria-label="See this view on the default branch"
>
<ChevronLeftIcon/>
</a>
);
branchSelector.parentElement!.before(defaultLink);
branchSelector.parentElement!.style.zIndex = 'auto'; // For #4240
groupButtons([defaultLink, branchSelector.parentElement!]).classList.add('d-flex');
}
void features.add(__filebasename, {
include: [
pageDetect.isRepoTree,
pageDetect.isSingleFile,
pageDetect.isRepoCommitList,
],
exclude: [
pageDetect.isRepoHome,
],
awaitDomReady: false,
deduplicate: '.rgh-default-branch-button', // #3945
init,
});
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