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index.ts
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index.ts
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import assert from 'assert'
import fs from 'fs-extra'
import path from 'path'
import { premove } from 'premove/sync'
import { mkdir } from 'mk-dirs/sync'
import { createPlugin, logger, HookPostBuildPayload, ManifestDynamicFile, getDynamicFilesFromManifest } from 'presta'
import { parse as toml } from 'toml'
// @ts-ignore
import { parseFileRedirects } from 'netlify-redirect-parser'
// TODO do I need more here?
export type NetlifyConfig = {
build: {
publish: string
functions?: string
}
}
export type NetlifyRedirect = {
from: string
to: string
status: number
force: boolean
query: { [param: string]: string }
conditions: { [param: string]: string }
signed: string | undefined
}
export function getNetlifyConfig({ cwd }: { cwd: string }): Partial<NetlifyConfig> | undefined {
const filepath = path.join(cwd, 'netlify.toml')
const raw = fs.readFileSync(filepath, 'utf8')
const json = toml(raw)
return JSON.parse(JSON.stringify(json))
}
export function validateAndNormalizeNetlifyConfig(config?: Partial<NetlifyConfig>): NetlifyConfig {
assert(!!config, `Missing required netlify.toml config file`)
assert(!!config.build, `Missing required netlify.toml config: build`)
const publish = toAbsolutePath(process.cwd(), config.build.publish)
assert(!!publish, `Missing required netlify.toml config: build.publish`)
const functions = toAbsolutePath(process.cwd(), config.build.functions)
return {
build: {
publish,
functions,
},
}
}
export function toAbsolutePath(cwd: string, file?: string) {
return file ? path.join(cwd, file) : undefined
}
export function normalizeNetlifyRoute(route: string) {
route = route.replace(/^\*/, '/*')
route = route.replace(/^\/\//, '/')
return route
}
export function prestaRoutesToNetlifyRedirects(files: ManifestDynamicFile[]): NetlifyRedirect[] {
return files.map((file) => ({
from: normalizeNetlifyRoute(file.route),
to: `/.netlify/functions/${path.basename(file.dest, '.js')}`,
status: 200,
force: false,
query: {},
conditions: {},
signed: undefined,
}))
}
export function generateRedirectsString(redirects: NetlifyRedirect[]) {
return redirects.map((r) => [r.from, r.to, `${r.status}${r.force ? '!' : ''}`].join(' ')).join('\n')
}
export async function getUserConfiguredRedirects(dir: string) {
return (
[
...(await parseFileRedirects(path.join(process.cwd(), '_redirects'))),
...(await parseFileRedirects(path.join(dir, '_redirects'))),
] as NetlifyRedirect[]
).reduce((redirects, redirect) => {
if (redirects.find((r) => r.from === redirect.from)) return redirects
return redirects.concat(redirect)
}, [] as NetlifyRedirect[])
}
export async function onPostBuild(config: NetlifyConfig, props: HookPostBuildPayload) {
const { output, staticOutput, functionsOutput, manifest } = props
const hasFunctions = fs.existsSync(functionsOutput)
const shouldCopyStaticFiles = config.build.publish !== staticOutput && fs.existsSync(staticOutput)
const shouldCopyFunctions = config.build.functions !== functionsOutput && hasFunctions
const userConfiguredRedirects = await getUserConfiguredRedirects(config.build.publish)
const debug = {
netlifyConfig: config,
postBuildPayload: props,
hasFunctions,
shouldCopyStaticFiles,
shouldCopyFunctions,
}
logger.debug({
label: '@presta/adapter-netlify',
message: `handling onPostBuild hook\n${JSON.stringify(debug)}`,
})
if (hasFunctions && !config.build.functions) {
throw new Error(`Missing required netlify.toml config: build.functions`)
}
if (shouldCopyStaticFiles) fs.copySync(staticOutput, config.build.publish)
if (shouldCopyFunctions) fs.copySync(functionsOutput, config.build.functions as string)
if (hasFunctions) {
const prestaRedirects = prestaRoutesToNetlifyRedirects(getDynamicFilesFromManifest(manifest))
const combinedRedirects = userConfiguredRedirects.concat(prestaRedirects)
const redirectsFilepath = path.join(config.build.publish, '_redirects')
mkdir(path.dirname(redirectsFilepath))
fs.writeFileSync(path.join(config.build.publish, '_redirects'), generateRedirectsString(combinedRedirects), 'utf8')
}
if ((shouldCopyStaticFiles && !shouldCopyFunctions) || (shouldCopyStaticFiles && shouldCopyFunctions)) {
premove(output)
}
logger.info({
label: '@presta/adapter-netlify',
message: `complete`,
})
}
export default createPlugin(() => {
return async function plugin(config, hooks) {
logger.debug({
label: '@presta/adapter-netlify',
message: `init`,
})
const netlify = validateAndNormalizeNetlifyConfig(getNetlifyConfig({ cwd: process.cwd() }))
logger.debug({
label: '@presta/adapter-netlify',
message: `configured ${JSON.stringify(netlify)}`,
})
hooks.onPostBuild((props) => {
/* c8 ignore next */
onPostBuild(netlify, props)
})
}
})