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import './default-branch-button.css';
import React from 'dom-chef';
import * as pageDetect from 'github-url-detection';
import {ChevronLeftIcon} from '@primer/octicons-react';
import features from '../feature-manager.js';
import GitHubURL from '../github-helpers/github-url.js';
import {groupButtons} from '../github-helpers/group-buttons.js';
import getDefaultBranch from '../github-helpers/get-default-branch.js';
import observe from '../helpers/selector-observer.js';
import {branchSelector} from '../github-helpers/selectors.js';
import isDefaultBranch from '../github-helpers/is-default-branch.js';
import {isRepoCommitListRoot} from '../github-helpers/index.js';
async function add(branchSelector: HTMLElement): Promise<void> {
// Don't show the button if we’re already on the default branch
// TODO: Move to `asLongAs` when it accepts async detections
if (await isDefaultBranch()) {
return;
}
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 = await getDefaultBranch();
}
const defaultLink = (
<a
className="btn tooltipped tooltipped-ne px-2"
href={url.href}
data-turbo-frame="repo-content-turbo-frame"
aria-label="See this view on the default branch"
>
<ChevronLeftIcon/>
</a>
);
// The DOM varies between details-based DOM and React-based one
const selectorWrapper = branchSelector.tagName === 'SUMMARY'
? branchSelector.parentElement!
: branchSelector;
selectorWrapper.before(defaultLink);
groupButtons([defaultLink, selectorWrapper]).classList.add('d-flex', 'rgh-default-branch-button-group');
}
function init(signal: AbortSignal): void {
observe(branchSelector, add, {signal});
}
void features.add(import.meta.url, {
include: [
pageDetect.isRepoTree,
pageDetect.isSingleFile,
isRepoCommitListRoot,
],
exclude: [
pageDetect.isRepoHome,
],
init,
});
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