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gatsby-node.js
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const _ = require('lodash')
const path = require('path')
const { createFilePath } = require('gatsby-source-filesystem')
exports.createPages = ({ graphql, boundActionCreators }) => {
const postsQuery = `
{
allMarkdownRemark(limit: 1000) {
edges {
node {
fields {
slug
}
frontmatter {
tags
}
}
}
}
}`
const { createPage } = boundActionCreators
const BlogPost = path.resolve('./src/templates/blog-post.jsx')
const TagPage = path.resolve('./src/templates/tag-page.jsx')
let tags = []
createPages = edges => {
edges.forEach(edge => {
const { slug } = edge.node.fields
if (_.startsWith(slug, '/posts/')) {
createPage({
path: slug,
component: BlogPost,
context: {
slug
},
})
tags = _.union(tags, edge.node.frontmatter.tags)
}
})
}
createTagPages = () => {
tags.sort().forEach(tag => {
createPage({
path: `tags/${tag}`,
component: TagPage,
context: {
tag
},
})
})
}
return graphql(postsQuery)
.then(result => {
if (result.errors) {
reject(result.errors)
}
return result.data.allMarkdownRemark.edges
})
.then(createPages)
.then(createTagPages)
.catch(console.error)
}
exports.onCreateNode = ({ node, boundActionCreators, getNode }) => {
const { createNodeField } = boundActionCreators
if (node.internal.type === `MarkdownRemark`) {
const value = createFilePath({ node, getNode })
createNodeField({
name: `slug`,
node,
value,
})
}
}
exports.modifyWebpackConfig = function ({config}, stage) {
config._config.devtool = 'cheap-module-source-map'
return config
}