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gatsby-node.js
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gatsby-node.js
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const _ = require('lodash')
const path = require('path')
// load env variables
require('dotenv').config({
path: `.env.${process.env.GATSBY_NODE_ENV}`,
})
const { createFilePath } = require('gatsby-source-filesystem');
const { fmImagesToRelative } = require('gatsby-remark-relative-images-v2');
exports.onCreateNode = ({ node, getNode, actions }) => {
const { createNodeField } = actions;
if (node.internal.type === 'MarkdownRemark') {
const slug = createFilePath({ node, getNode, basePath: 'pages' })
fmImagesToRelative(node);
createNodeField({
node,
name: 'slug',
value: slug,
})
};
};
exports.createPages = async ({ graphql, actions }) => {
const tagsTemplate = path.resolve('src/templates/tags-template.js')
const { createPage } = actions
const result = await graphql(`
query {
allMarkdownRemark {
edges {
node {
frontmatter {
path
template
tags
}
fields {
slug
}
}
}
}
}
`);
result.data.allMarkdownRemark.edges.forEach(({ node }) => {
createPage({
path: node.frontmatter.path,
component: path.resolve(`./src/templates/${node.frontmatter.template}.js`),
context: {
// Data passed to context is available
//in page queries as GraphQL variables.
slug: node.fields.slug,
},
})
});
// create Tags pages
// pulled directly from https://www.gatsbyjs.org/docs/adding-tags-and-categories-to-blog-posts/#add-tags-to-your-markdown-files
let tags = [];
// Iterate through each post, putting all found tags into `tags`
_.each(result.data.allMarkdownRemark.edges, edge => {
if (_.get(edge, 'node.frontmatter.tags')) {
tags = tags.concat(edge.node.frontmatter.tags);
}
});
// Eliminate duplicate tags
tags = _.uniq(tags);
// Make tag pages
tags.forEach(tag => {
createPage({
path: `/tags/${_.kebabCase(tag)}/`,
component: tagsTemplate,
context: {
tag,
},
});
});
}