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157 lines (137 loc) · 4.04 KB
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/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* @emails react-core
*/
'use strict';
const {resolve} = require('path');
module.exports = async ({graphql, actions}) => {
const {createPage, createRedirect} = actions;
// Used to detect and prevent duplicate redirects
const redirectToSlugMap = {};
const blogTemplate = resolve(__dirname, '../src/templates/blog.js');
const communityTemplate = resolve(__dirname, '../src/templates/community.js');
const docsTemplate = resolve(__dirname, '../src/templates/docs.js');
const tutorialTemplate = resolve(__dirname, '../src/templates/tutorial.js');
// Redirect /index.html to root.
createRedirect({
fromPath: '/index.html',
redirectInBrowser: true,
toPath: '/',
});
const allMarkdown = await graphql(
`
{
allMarkdownRemark(limit: 1000) {
edges {
node {
fields {
redirect
slug
}
}
}
}
}
`,
);
if (allMarkdown.errors) {
console.error(allMarkdown.errors);
throw Error(allMarkdown.errors);
}
allMarkdown.data.allMarkdownRemark.edges.forEach(edge => {
const slug = edge.node.fields.slug;
if (slug === 'docs/error-decoder.html') {
// No-op so far as markdown templates go.
// Error codes are managed by a page in src/pages
// (which gets created by Gatsby during a separate phase).
} else if (
slug.includes('blog/') ||
slug.includes('community/') ||
slug.includes('contributing/') ||
slug.includes('docs/') ||
slug.includes('tutorial/') ||
slug.includes('warnings/')
) {
let template;
if (slug.includes('blog/')) {
template = blogTemplate;
} else if (slug.includes('community/')) {
template = communityTemplate;
} else if (
slug.includes('contributing/') ||
slug.includes('docs/') ||
slug.includes('warnings/')
) {
template = docsTemplate;
} else if (slug.includes('tutorial/')) {
template = tutorialTemplate;
}
const createArticlePage = path =>
createPage({
path: path,
component: template,
context: {
slug,
},
});
// Register primary URL.
createArticlePage(slug);
// Register redirects as well if the markdown specifies them.
if (edge.node.fields.redirect) {
let redirect = JSON.parse(edge.node.fields.redirect);
if (!Array.isArray(redirect)) {
redirect = [redirect];
}
redirect.forEach(fromPath => {
if (redirectToSlugMap[fromPath] != null) {
console.error(
`Duplicate redirect detected from "${fromPath}" to:\n` +
`* ${redirectToSlugMap[fromPath]}\n` +
`* ${slug}\n`,
);
process.exit(1);
}
// A leading "/" is required for redirects to work,
// But multiple leading "/" will break redirects.
// For more context see github.com/reactjs/reactjs.org/pull/194
const toPath = slug.startsWith('/') ? slug : `/${slug}`;
redirectToSlugMap[fromPath] = slug;
createRedirect({
fromPath: `/${fromPath}`,
redirectInBrowser: true,
toPath,
});
});
}
}
});
const newestBlogEntry = await graphql(
`
{
allMarkdownRemark(
limit: 1
filter: {fileAbsolutePath: {regex: "/blog/"}}
sort: {fields: [fields___date], order: DESC}
) {
edges {
node {
fields {
slug
}
}
}
}
}
`,
);
const newestBlogNode = newestBlogEntry.data.allMarkdownRemark.edges[0].node;
// Blog landing page should always show the most recent blog entry.
['/blog/', '/blog'].map(slug => {
createRedirect({
fromPath: slug,
redirectInBrowser: true,
toPath: newestBlogNode.fields.slug,
});
});
};