1+ import { spawnSync } from "child_process" ;
12import fsExtra from "fs-extra" ;
2- import { PHASE_PRODUCTION_BUILD } from "./constants.js " ;
3- import { ROUTES_MANIFEST } from "./constants.js " ;
3+ import { createRequire } from "node:module " ;
4+ import { join , relative , normalize } from "path " ;
45import { fileURLToPath } from "url" ;
5- import { OutputBundleOptions } from "./interfaces.js" ;
66import { stringify as yamlStringify } from "yaml" ;
7- import { spawnSync } from "child_process" ;
87
9- import { join , relative , normalize } from "path" ;
8+ import { PHASE_PRODUCTION_BUILD } from "./constants.js" ;
9+ import { ROUTES_MANIFEST } from "./constants.js" ;
10+ import { OutputBundleOptions , RoutesManifest } from "./interfaces.js" ;
11+ import { NextConfigComplete } from "next/dist/server/config-shared.js" ;
1012
11- import type { RoutesManifest } from "./interfaces.js" ;
1213// fs-extra is CJS, readJson can't be imported using shorthand
1314export const { move, exists, writeFile, readJson } = fsExtra ;
1415
15- export async function loadConfig ( cwd : string ) {
16+ // The default fallback command prefix to run a build.
17+ export const DEFAULT_COMMAND = "npm" ;
18+
19+ // Loads the user's next.config.js file.
20+ export async function loadConfig ( root : string , projectRoot : string ) : Promise < NextConfigComplete > {
21+ // createRequire() gives us access to Node's CommonJS implementation of require.resolve()
22+ // (https://nodejs.org/api/module.html#modulecreaterequirefilename).
23+ // We use the require.resolve() resolution algorithm to get the path to the next config module,
24+ // which may reside in the node_modules folder at a higher level in the directory structure
25+ // (e.g. for monorepo projects).
26+ // Note that ESM has an equivalent (https://nodejs.org/api/esm.html#importmetaresolvespecifier),
27+ // but the feature is still experimental.
28+ const require = createRequire ( import . meta. url ) ;
29+ const configPath = require . resolve ( "next/dist/server/config.js" , { paths : [ projectRoot ] } ) ;
1630 // dynamically load NextJS so this can be used in an NPX context
1731 const { default : nextServerConfig } : { default : typeof import ( "next/dist/server/config.js" ) } =
18- await import ( `${ cwd } ) ;
32+ await import ( configPath ) ;
33+
1934 const loadConfig = nextServerConfig . default ;
20- return await loadConfig ( PHASE_PRODUCTION_BUILD , cwd ) ;
35+ return await loadConfig ( PHASE_PRODUCTION_BUILD , root ) ;
2136}
2237
2338export async function readRoutesManifest ( distDir : string ) : Promise < RoutesManifest > {
@@ -30,42 +45,62 @@ export const isMain = (meta: ImportMeta) => {
3045 return process . argv [ 1 ] === fileURLToPath ( meta . url ) ;
3146} ;
3247
33- export function populateOutputBundleOptions ( cwd : string ) : OutputBundleOptions {
34- const outputBundleDir = join ( cwd , ".apphosting" ) ;
48+ /**
49+ * Provides the paths in the output bundle for the built artifacts.
50+ * @param rootDir The root directory of the uploaded source code.
51+ * @param appDir The path to the application source code, relative to the root.
52+ * @return The output bundle paths.
53+ */
54+ export function populateOutputBundleOptions ( rootDir : string , appDir : string ) : OutputBundleOptions {
55+ const outputBundleDir = join ( rootDir , ".apphosting" ) ;
56+ // In monorepo setups, the standalone directory structure will mirror the structure of the monorepo.
57+ // We find the relative path from the root to the app directory to correctly locate server.js.
58+ const outputBundleAppDir = join (
59+ outputBundleDir ,
60+ process . env . MONOREPO_COMMAND ? relative ( rootDir , appDir ) : "" ,
61+ ) ;
62+
3563 return {
3664 bundleYamlPath : join ( outputBundleDir , "bundle.yaml" ) ,
3765 outputDirectory : outputBundleDir ,
38- serverFilePath : join ( outputBundleDir , "server.js" ) ,
39- outputPublicDirectory : join ( outputBundleDir , "public" ) ,
40- outputStaticDirectory : join ( outputBundleDir , ".next" , "static" ) ,
66+ serverFilePath : join ( outputBundleAppDir , "server.js" ) ,
67+ outputPublicDirectory : join ( outputBundleAppDir , "public" ) ,
68+ outputStaticDirectory : join ( outputBundleAppDir , ".next" , "static" ) ,
4169 } ;
4270}
4371
4472// Run build command
45- export function build ( cwd : string ) : void {
73+ export function build ( cwd : string , cmd = DEFAULT_COMMAND ) : void {
4674 // Set standalone mode
4775 process . env . NEXT_PRIVATE_STANDALONE = "true" ;
4876 // Opt-out sending telemetry to Vercel
4977 process . env . NEXT_TELEMETRY_DISABLED = "1" ;
50- spawnSync ( "npm" , [ "run" , "build" ] , { cwd, shell : true , stdio : "inherit" } ) ;
78+ spawnSync ( cmd , [ "run" , "build" ] , { cwd, shell : true , stdio : "inherit" } ) ;
5179}
5280
53- // move the standalone directory, the static directory and the public directory to apphosting output directory
54- // as well as generating bundle.yaml
81+ /**
82+ * Moves the standalone directory, the static directory and the public directory to apphosting output directory.
83+ * Also generates the bundle.yaml file.
84+ * @param rootDir The root directory of the uploaded source code.
85+ * @param appDir The path to the application source code, relative to the root.
86+ * @param outputBundleOptions The target location of built artifacts in the output bundle.
87+ * @param nextBuildDirectory The location of the .next directory.
88+ */
5589export async function generateOutputDirectory (
56- cwd : string ,
90+ rootDir : string ,
91+ appDir : string ,
5792 outputBundleOptions : OutputBundleOptions ,
5893 nextBuildDirectory : string ,
5994) : Promise < void > {
6095 const standaloneDirectory = join ( nextBuildDirectory , "standalone" ) ;
6196 await move ( standaloneDirectory , outputBundleOptions . outputDirectory , { overwrite : true } ) ;
6297
6398 const staticDirectory = join ( nextBuildDirectory , "static" ) ;
64- const publicDirectory = join ( cwd , "public" ) ;
99+ const publicDirectory = join ( appDir , "public" ) ;
65100 await Promise . all ( [
66101 move ( staticDirectory , outputBundleOptions . outputStaticDirectory , { overwrite : true } ) ,
67102 movePublicDirectory ( publicDirectory , outputBundleOptions . outputPublicDirectory ) ,
68- generateBundleYaml ( outputBundleOptions , nextBuildDirectory , cwd ) ,
103+ generateBundleYaml ( outputBundleOptions , nextBuildDirectory , rootDir ) ,
69104 ] ) ;
70105 return ;
71106}
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