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import { writeFile } from 'node:fs/promises';
import { extname, join } from 'node:path';
import { fileURLToPath } from 'node:url';
import type { AstroAdapter, AstroConfig, AstroIntegration, RouteData } from 'astro';
import { generateEdgeMiddleware } from './middleware.js';
import type { Args } from './netlify-functions.js';
import { createRedirects } from './shared.js';
export const NETLIFY_EDGE_MIDDLEWARE_FILE = 'netlify-edge-middleware';
export const ASTRO_LOCALS_HEADER = 'x-astro-locals';
export function getAdapter({ functionPerRoute, edgeMiddleware, ...args }: Args): AstroAdapter {
return {
name: '@astrojs/netlify/functions',
serverEntrypoint: '@astrojs/netlify/netlify-functions.js',
exports: ['handler'],
args,
adapterFeatures: {
functionPerRoute,
edgeMiddleware,
},
supportedAstroFeatures: {
hybridOutput: 'stable',
staticOutput: 'stable',
serverOutput: 'stable',
assets: {
supportKind: 'stable',
isSharpCompatible: true,
isSquooshCompatible: true,
},
},
};
}
interface NetlifyFunctionsOptions {
dist?: URL;
builders?: boolean;
binaryMediaTypes?: string[];
edgeMiddleware?: boolean;
functionPerRoute?: boolean;
}
function netlifyFunctions({
dist,
builders,
binaryMediaTypes,
functionPerRoute = false,
edgeMiddleware = false,
}: NetlifyFunctionsOptions = {}): AstroIntegration {
let _config: AstroConfig;
let _entryPoints: Map<RouteData, URL>;
let ssrEntryFile: string;
let _middlewareEntryPoint: URL;
return {
name: '@astrojs/netlify',
hooks: {
'astro:config:setup': ({ config, updateConfig }) => {
const outDir = dist ?? new URL('./dist/', config.root);
updateConfig({
outDir,
build: {
redirects: false,
client: outDir,
server: new URL('./.netlify/functions-internal/', config.root),
},
});
},
'astro:build:ssr': async ({ entryPoints, middlewareEntryPoint }) => {
if (middlewareEntryPoint) {
_middlewareEntryPoint = middlewareEntryPoint;
}
_entryPoints = entryPoints;
},
'astro:config:done': ({ config, setAdapter }) => {
setAdapter(
getAdapter({
binaryMediaTypes,
builders,
functionPerRoute,
edgeMiddleware,
})
);
_config = config;
ssrEntryFile = config.build.serverEntry.replace(/\.m?js/, '');
if (config.output === 'static') {
// eslint-disable-next-line no-console
console.warn(
`[@astrojs/netlify] \`output: "server"\` or \`output: "hybrid"\` is required to use this adapter.`
);
// eslint-disable-next-line no-console
console.warn(
`[@astrojs/netlify] Otherwise, this adapter is not required to deploy a static site to Netlify.`
);
}
},
'astro:build:done': async ({ routes, dir }) => {
const functionsConfig = {
version: 1,
config: {
nodeModuleFormat: 'esm',
},
};
const functionsConfigPath = join(fileURLToPath(_config.build.server), 'entry.json');
await writeFile(functionsConfigPath, JSON.stringify(functionsConfig));
const type = builders ? 'builders' : 'functions';
const kind = type ?? 'functions';
if (_entryPoints.size) {
const routeToDynamicTargetMap = new Map();
for (const [route, entryFile] of _entryPoints) {
const wholeFileUrl = fileURLToPath(entryFile);
const extension = extname(wholeFileUrl);
const relative = wholeFileUrl
.replace(fileURLToPath(_config.build.server), '')
.replace(extension, '')
.replaceAll('\\', '/');
const dynamicTarget = `/.netlify/${kind}/${relative}`;
routeToDynamicTargetMap.set(route, dynamicTarget);
}
await createRedirects(_config, routeToDynamicTargetMap, dir);
} else {
const dynamicTarget = `/.netlify/${kind}/${ssrEntryFile}`;
const map: [RouteData, string][] = routes.map((route) => {
return [route, dynamicTarget];
});
const routeToDynamicTargetMap = new Map(Array.from(map));
await createRedirects(_config, routeToDynamicTargetMap, dir);
}
if (_middlewareEntryPoint) {
const outPath = fileURLToPath(new URL('./.netlify/edge-functions/', _config.root));
const netlifyEdgeMiddlewareHandlerPath = new URL(
NETLIFY_EDGE_MIDDLEWARE_FILE,
_config.srcDir
);
await generateEdgeMiddleware(
_middlewareEntryPoint,
outPath,
netlifyEdgeMiddlewareHandlerPath
);
}
},
},
};
}
export { netlifyFunctions as default, netlifyFunctions };
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