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bare-operating-system/packages/bare-os-booter/lib/ctx/bare-os-ctx-bare.js
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snxraven d3aa66b0cc
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JavaScript

/**
* Host-resolved Bare / companion npm modules for in-image scripts (`ctx.bare`),
* plus optional merge from trusted IIFE bundles on the system drive.
*/
import b4a from 'b4a'
import { readFileSync } from '#host-fs'
import { dirname, join } from '#host-path'
import { fileURLToPath, pathToFileURL } from 'url'
import bareModuleManifestEmbedded from './bare-module-manifest.data.mjs'
import { pearCtxHostByPackage } from '#pear-ctx-host'
import { pearCtxPearOnlyHostByPackage } from './bare-os-ctx-pear-host-pear-only.js'
import { bareOsHostBooterWarn } from '../host/bare-os-host-booter-log.js'
import {
bareOsStandaloneHostModulesByPackage,
bareOsStandaloneNodeBuiltinModules
} from './bare-os-ctx-bare-host-modules.mjs'
/**
* Used only by {@link tryLoadBareCtxKeyFromDriveBundlePath}: some Bare booters lack
* `TextDecoder`. Dynamic `import('b4a')` fails on Pear (no referrer); static import is fine.
* @param {Uint8Array} buf
*/
function decodeUtf8BytesBareFallback(buf) {
if (typeof TextDecoder !== 'undefined') {
try {
return new TextDecoder().decode(buf)
} catch {
/* ignore */
}
}
return b4a.toString(buf, 'utf8')
}
/**
* `fileURLToPath` only accepts `file:` URLs. Pear uses `pear://dev/...` for `import.meta.url`,
* so we must not call it at load time or when running under `pear run`.
* @returns {string | null}
*/
function bareOsBooterPackageJsonPathForCreateRequire() {
const href = String(import.meta.url)
if (!href.startsWith('file:')) return null
try {
return fileURLToPath(new URL('../../package.json', import.meta.url))
} catch {
return null
}
}
/**
* Root of the packed app bundle (`bare:/app.bundle/`) when running a standalone binary.
* @returns {string | null}
*/
function appBundleRootHref() {
const href = String(import.meta.url || '')
const marker = '/app.bundle/'
const i = href.indexOf(marker)
if (i < 0) return null
return href.slice(0, i + marker.length)
}
/** Packages whose `.bare` addons drive IIFEs commonly need via `require.addon()`. */
const DRIVE_BUNDLE_ADDON_PACKAGE_CANDIDATES = [
'bare-os',
'bare-url',
'bare-path',
'bare-fs',
'bare-crypto',
'bare-buffer',
'bare-tcp',
'bare-tls',
'bare-pipe',
'bare-dns',
'bare-zlib',
'bare-hrtime',
'bare-signals',
'bare-tty',
'bare-stdio',
'bare-module',
'bare-inspect',
'bare-performance',
'bare-subprocess',
'bare-net',
'bare-dgram',
'bare-https',
'bare-http1',
'bare-ws',
'bare-fetch',
'bare-abort',
'bare-type',
'bare-type-stripper',
'bare-module-lexer',
'udx-native',
'sodium-native',
'quickbit-native',
'simdle-native',
'rocksdb-native',
'fs-native-extensions'
]
/**
* Drive IIFEs call `require("events")`, `require("bare-stream")`, …; `new Function` has no
* lexical `require`, so they look at **`globalThis.require`**. Bundled code also calls
* **`__require.addon()`** (native bindings); that only works when `globalThis.require` is from
* **`bare-module`'s `createRequire`** (exposes **`require.addon`**). A bare function or Node-only
* `require` breaks eval with **`__require.addon is not a function`**.
*
* Order: if existing `require` already has **`addon`**, use it; else install **`createRequire`**
* from the booter **`file:`** package.json when available; else **`createRequire(import.meta.url)`**
* (covers **`pear://`** on Bare). If **`addon`** is still missing (e.g. Node dev), attach a stub
* for the duration of eval only.
*
* On **`bare:/app.bundle/`** standalones, prefer **`createRequire`** rooted at
* **`bare-node-runtime`** (Node builtin imports map) and fall back **`require.addon('.')`** across
* packed native packages — drive IIFEs otherwise resolve addons against this file's URL and fail.
*
* Prefer the statically packed `bare-module` binding: dynamic `import('bare-module')` often
* fails under `bare:/app.bundle/` (no per-referrer resolution entry for this file).
*
* @param {string} parentURL
* @returns {Promise<Function | null>}
*/
async function tryBareModuleCreateRequire(parentURL) {
try {
const bm =
bareOsStandaloneHostModulesByPackage['bare-module'] ||
(await import('bare-module'))
const createRequire = bm.createRequire || bm.default?.createRequire
if (typeof createRequire !== 'function') return null
return createRequire(parentURL)
} catch {
return null
}
}
/**
* Resolve a CommonJS-style specifier for drive IIFEs using packed host modules when
* `createRequire` cannot see Node builtins under the app bundle.
* @param {string} specifier
* @returns {unknown | undefined}
*/
function resolveDriveBundleHostModule(specifier) {
if (typeof specifier !== 'string' || !specifier) return undefined
const builtin = bareOsStandaloneNodeBuiltinModules[specifier]
if (builtin !== undefined) {
return builtin?.default !== undefined ? builtin.default : builtin
}
if (specifier.startsWith('node:')) {
const bare = bareOsStandaloneNodeBuiltinModules[specifier.slice(5)]
if (bare !== undefined) {
return bare?.default !== undefined ? bare.default : bare
}
}
const packed = bareOsStandaloneHostModulesByPackage[specifier]
if (packed !== undefined) {
return packed?.default !== undefined ? packed.default : packed
}
return undefined
}
/**
* @param {Function | null} primary
* @param {Function[]} fallbacks
*/
function composeDriveBundleAddon(primary, fallbacks) {
const list = []
if (typeof primary === 'function') list.push(primary)
for (const fn of fallbacks) {
if (typeof fn === 'function' && !list.includes(fn)) list.push(fn)
}
if (!list.length) return driveBundleRequireAddonStub()
const composed = function bareOsDriveBundleAddon(specifier, opts) {
const spec = specifier == null || specifier === '' ? '.' : specifier
/** @type {unknown} */
let lastErr = null
for (const fn of list) {
try {
return fn.call(this, spec, opts)
} catch (err) {
lastErr = err
}
}
throw lastErr instanceof Error
? lastErr
: new Error(String(lastErr || 'ADDON_NOT_FOUND'))
}
const first = list[0]
try {
if (typeof first.resolve === 'function')
composed.resolve = first.resolve.bind(first)
if (first.host !== undefined) composed.host = first.host
} catch {
/* ignore */
}
return composed
}
/**
* Pear `import('pkg')` can fail when the current referrer is a `pear://` booter URL.
* Try loading via bare-module's createRequire from the booter package root first,
* then fall back to `createRequire(import.meta.url)`.
*
* @param {string} specifier
* @returns {Promise<unknown>}
*/
export async function tryRequireFromBooter(specifier) {
if (typeof specifier !== 'string' || !specifier.trim()) return undefined
const liveRequire = globalThis.require
if (typeof liveRequire === 'function') {
try {
return liveRequire(specifier)
} catch {
/* continue */
}
}
const pkgJson = bareOsBooterPackageJsonPathForCreateRequire()
if (pkgJson) {
try {
const href = pathToFileURL(pkgJson).href
const req = await tryBareModuleCreateRequire(href)
if (typeof req === 'function') return req(specifier)
} catch {
/* continue */
}
}
try {
const req = await tryBareModuleCreateRequire(import.meta.url)
if (typeof req === 'function') return req(specifier)
} catch {
/* continue */
}
return undefined
}
/**
* Install `globalThis.require` from bare-module `createRequire` when missing.
* Vendored CJS (bare-discord-js) and drive IIFEs look at the global.
*
* @returns {Promise<Function | null>}
*/
export async function ensureGlobalRequireForCtxBareHostImports() {
const existing = globalThis.require
if (typeof existing === 'function' && typeof existing.addon === 'function') {
return existing
}
const pkgJson = bareOsBooterPackageJsonPathForCreateRequire()
if (pkgJson) {
try {
const href = pathToFileURL(pkgJson).href
const req = await tryBareModuleCreateRequire(href)
if (typeof req === 'function') {
globalThis.require = req
return req
}
} catch {
/* continue */
}
}
try {
const req = await tryBareModuleCreateRequire(import.meta.url)
if (typeof req === 'function') {
globalThis.require = req
return req
}
} catch {
/* continue */
}
return typeof existing === 'function' ? existing : null
}
/** @returns {import('bare-module').Require['addon']} */
function driveBundleRequireAddonStub() {
const stub = function bareOsDriveBundleAddon() {
return new Proxy(
{},
{
get() {
return function bareOsDriveBundleAddonExport() {
return {}
}
}
}
)
}
stub.resolve = function bareOsDriveBundleAddonResolve() {
return ''
}
stub.host = ''
return stub
}
/**
* Install a temporary `require` wrapper for drive-bundle eval so we control both
* module resolution and the `require.addon` surface seen by esbuild IIFEs.
*
* @param {Function | null} delegate
* @param {Function} addon
*/
function createDriveBundleRequireWrapper(delegate, addon) {
const wrapped = function bareOsDriveBundleRequire(specifier, ...rest) {
const host = resolveDriveBundleHostModule(specifier)
if (host !== undefined) return host
if (typeof delegate === 'function') {
return Reflect.apply(delegate, this, [specifier, ...rest])
}
throw new Error(`Dynamic require of "${specifier}" is not supported`)
}
if (typeof delegate === 'function') {
for (const key of ['cache', 'extensions', 'main']) {
try {
const v = delegate[key]
if (v !== undefined) wrapped[key] = v
} catch {
/* ignore */
}
}
}
wrapped.resolve = function bareOsDriveBundleResolve(specifier, options) {
if (resolveDriveBundleHostModule(specifier) !== undefined) return specifier
if (typeof delegate?.resolve === 'function') {
return delegate.resolve(specifier, options)
}
throw new Error(`Cannot resolve module "${specifier}"`)
}
wrapped.addon = addon
return wrapped
}
async function withDriveBundleGlobalRequire(fn) {
const origRequire = globalThis.require
/** @type {Function | null} */
let delegate =
typeof origRequire === 'function'
? /** @type {Function} */ (origRequire)
: null
const bundleRoot = appBundleRootHref()
// Standalone: bare-node-runtime's createRequire carries the Node builtin import map
// (path/os/util/…) that drive IIFEs need. createRequire(this file) does not.
if (bundleRoot) {
try {
const bnrReq = await tryBareModuleCreateRequire(
new URL('node_modules/bare-node-runtime/package.json', bundleRoot).href
)
if (typeof bnrReq === 'function') delegate = bnrReq
} catch {
/* continue */
}
}
if (!delegate) {
const pkgJson = bareOsBooterPackageJsonPathForCreateRequire()
if (pkgJson) {
try {
const href = pathToFileURL(pkgJson).href
const req = await tryBareModuleCreateRequire(href)
if (typeof req === 'function') delegate = req
} catch {
/* continue */
}
}
}
if (!delegate) {
const req = await tryBareModuleCreateRequire(import.meta.url)
if (typeof req === 'function') delegate = req
}
/** @type {Function | null} */
let addon =
typeof delegate?.addon === 'function'
? /** @type {Function} */ (delegate.addon)
: null
if (!addon) {
const addonReq = await tryBareModuleCreateRequire(import.meta.url)
if (addonReq && typeof addonReq.addon === 'function') addon = addonReq.addon
}
/** @type {Function[]} */
const addonFallbacks = []
if (bundleRoot) {
for (const name of DRIVE_BUNDLE_ADDON_PACKAGE_CANDIDATES) {
try {
const req = await tryBareModuleCreateRequire(
new URL(`node_modules/${name}/package.json`, bundleRoot).href
)
if (req && typeof req.addon === 'function')
addonFallbacks.push(req.addon)
} catch {
/* skip missing / unpackaged natives */
}
}
}
globalThis.require = createDriveBundleRequireWrapper(
delegate,
composeDriveBundleAddon(addon, addonFallbacks)
)
try {
return await fn(globalThis.require)
} finally {
if (origRequire === undefined) delete globalThis.require
else globalThis.require = origRequire
}
}
/**
* Eval a drive IIFE with an explicit `require` binding (must expose `.addon`) and
* CommonJS-ish `__filename` / `__dirname` shims.
* @param {string} logicalPath
* @param {string} source
* @param {Function} [req]
*/
function runDriveBundleSource(logicalPath, source, req) {
const filename = `bare-drive-bundle:${logicalPath}`
const slash = logicalPath.lastIndexOf('/')
const dirname = slash >= 0 ? logicalPath.slice(0, slash) || '/' : '/'
const requireFn =
typeof req === 'function'
? req
: typeof globalThis.require === 'function'
? globalThis.require
: function missingRequire(x) {
throw new Error(`Dynamic require of "${x}" is not supported`)
}
const run = new Function(
'require',
'__filename',
'__dirname',
`"use strict";\n${source}\n//# sourceURL=${filename}`
)
run(requireFn, filename, dirname)
}
export const BARE_OS_STDLIB_GLOBAL = '__bare_os_stdlib__'
const MANIFEST_NAME = 'bare-module-manifest.json'
/**
* @param {unknown} m
* @returns {typeof bareModuleManifestEmbedded}
*/
function cloneBareModuleManifest(m) {
return /** @type {typeof bareModuleManifestEmbedded} */ (
JSON.parse(JSON.stringify(m))
)
}
/** @type {{ version: number, entries: Array<{ ctxKey: string, package: string, export?: string, bundle?: boolean, optional?: boolean, tier?: string }> } | null} */
let _cachedManifest = null
/**
* Embedded copy of **`bare-module-manifest.json`** for Pear (`pear://` **import.meta.url**).
* `bare-fs` coerces **`URL`** arguments through **`bare-url.fileURLToPath`**, which rejects
* non-`file:` schemes, so **`readFileSync(new URL('pear:…'))`** cannot load the JSON from the
* bundle. Static import of **`bare-module-manifest.data.mjs`** (regenerated by
* **`npm run sync:bare-manifest`**) keeps the manifest in the Pear module graph.
*
* On **`file:`** trees, the JSON on disk is preferred so edits apply without regenerating `.data.mjs`.
*/
export function loadBareModuleManifest() {
if (_cachedManifest) return _cachedManifest
const href = String(import.meta.url)
if (href.startsWith('pear:')) {
_cachedManifest = cloneBareModuleManifest(bareModuleManifestEmbedded)
return _cachedManifest
}
if (href.startsWith('file:')) {
try {
const libDir = dirname(fileURLToPath(href))
const raw = readFileSync(join(libDir, MANIFEST_NAME), 'utf8')
_cachedManifest = JSON.parse(raw)
} catch {
_cachedManifest = cloneBareModuleManifest(bareModuleManifestEmbedded)
}
return _cachedManifest
}
_cachedManifest = cloneBareModuleManifest(bareModuleManifestEmbedded)
return _cachedManifest
}
/** Exported for tests: default export object from **`bare-module-manifest.data.mjs`**. */
export function bareOsBareModuleManifestEmbeddedRef() {
return bareModuleManifestEmbedded
}
/** Cached pear manifest (reuses the same underlying manifest object for v1). */
let _cachedPearManifest = null
export function loadPearModuleManifest() {
if (_cachedPearManifest) return _cachedPearManifest
const full = loadBareModuleManifest()
_cachedPearManifest = {
version: full.version,
entries: Array.isArray(full.pearEntries) ? full.pearEntries : []
}
return _cachedPearManifest
}
/**
* @param {Record<string, string>} shellEnv
*/
export function bareOsBareModulesEnabled(shellEnv) {
if (!shellEnv || typeof shellEnv !== 'object') return true
const v = shellEnv.BARE_OS_BARE_MODULES
return v !== '0' && v !== 'false'
}
/**
* @param {Record<string, string>} shellEnv
*/
export function bareOsBareDriveBundlesEnabled(shellEnv) {
if (!shellEnv || typeof shellEnv !== 'object') return true
const v = shellEnv.BARE_OS_BARE_DRIVE_BUNDLES
if (v === '0' || v === 'false') return false
return bareOsBareModulesEnabled(shellEnv)
}
/**
* When false, skip host `import(pkg)` for ctx.bare (use only `/lib/bare` IIFEs).
* Set **`BARE_OS_BARE_HOST_IMPORTS=0`** for a fully image-local stdlib.
*/
export function bareOsBareHostImportsEnabled(shellEnv) {
if (!shellEnv || typeof shellEnv !== 'object') return true
const v = shellEnv.BARE_OS_BARE_HOST_IMPORTS
if (v === '0' || v === 'false') return false
return true
}
/**
* Populate object with host `import()` results (per manifest). Mutates `target`.
* @param {Record<string, string>} shellEnv
* @param {Record<string, unknown>} target
*/
function bareHostRuntime() {
if (typeof globalThis.Bare !== 'undefined') return true
const v = globalThis.process?.versions
return Boolean(v && typeof v.bare === 'string')
}
export async function buildBareCtxObjectFromHost(shellEnv, target) {
if (!bareOsBareModulesEnabled(shellEnv)) return
if (!bareOsBareHostImportsEnabled(shellEnv)) return
const pearBooter =
typeof import.meta !== 'undefined' &&
String(import.meta.url || '').startsWith('pear:')
const { entries } = loadBareModuleManifest()
const skipHostKeys = new Set(
String(shellEnv?.BARE_OS_BARE_HOST_SKIP_CTX_KEYS || '')
.split(/[\s,]+/)
.map((s) => s.trim())
.filter(Boolean)
)
const onlyHostKeysRaw = String(
shellEnv?.BARE_OS_BARE_HOST_ONLY_CTX_KEYS || ''
)
.split(/[\s,]+/)
.map((s) => s.trim())
.filter(Boolean)
const onlyHostKeys =
onlyHostKeysRaw.length > 0 ? new Set(onlyHostKeysRaw) : null
const onBare = bareHostRuntime()
const tasks = entries.map(async (ent) => {
if (!onBare && ent.nativeHint === true) return null
const key = ent.ctxKey
if (!key || target[key] !== undefined) return null
if (skipHostKeys.has(key)) return null
if (onlyHostKeys && !onlyHostKeys.has(key)) return null
// Pear (`pear:` import.meta.url): bare-module cannot resolve `import("holesail")` from
// this booter URL (MODULE_NOT_FOUND / no referrer). Drive IIFEs supply bundle:true keys.
if (pearBooter && ent.bundle === true) return null
try {
const packed = bareOsStandaloneHostModulesByPackage[ent.package]
if (packed !== undefined) {
const val = ent.sideEffectImport
? packed?.default !== undefined
? packed.default
: true
: ent.export === '*'
? packed
: packed?.default !== undefined
? packed.default
: packed
return { key, ent, val }
}
const mod = await import(/* webpackIgnore: true */ ent.package)
const val = ent.sideEffectImport
? mod?.default !== undefined
? mod.default
: true
: ent.export === '*'
? mod
: mod?.default !== undefined
? mod.default
: mod
return { key, ent, val }
} catch (err) {
return { key, ent, err }
}
})
const settled = await Promise.all(tasks)
for (const r of settled) {
if (!r) continue
const { key, ent, val, err } = r
if (err) {
if (!ent.optional) {
bareOsHostBooterWarn(
'ctx_bare_module_load_failed',
`ctx.bare.${key}: failed to load "${ent.package}"`,
err?.message || String(err)
)
}
continue
}
if (val !== undefined) target[key] = val
}
}
/**
* @param {{ sideEffectImport?: boolean, export?: string }} ent
* @param {unknown} mod
*/
function pearEntryExportValue(ent, mod) {
if (ent.sideEffectImport) {
return mod?.default !== undefined ? mod.default : true
}
if (ent.export === '*') return mod
return mod?.default !== undefined ? mod.default : mod
}
/** @type {Record<string, unknown> | null} */
let _pearCtxPearOnlyHostByPackage = null
function pearCtxPearOnlyHostMap() {
if (_pearCtxPearOnlyHostByPackage) return _pearCtxPearOnlyHostByPackage
_pearCtxPearOnlyHostByPackage = pearCtxPearOnlyHostByPackage
return _pearCtxPearOnlyHostByPackage
}
/**
* Load one Pear-tier package from the booter host. On Bare/Pear, use the static
* `#pear-ctx-host` map (Pear-traced imports). pear-bundle and pear-ref come from
* bare-os-ctx-pear-host-pear-only.js (populated when globalThis.Pear exists).
* On Node dev, fall back to require/import.
*
* @param {{ package: string, sideEffectImport?: boolean, export?: string }} ent
* @param {{ pearBooter: boolean, pearRequire: Function | null, onBare: boolean }} opts
*/
async function loadPearPackageFromHost(
ent,
{ pearBooter, pearRequire, onBare }
) {
if (
(pearBooter || onBare) &&
Object.prototype.hasOwnProperty.call(pearCtxHostByPackage, ent.package)
) {
return pearEntryExportValue(ent, pearCtxHostByPackage[ent.package])
}
const pearOnly = pearCtxPearOnlyHostMap()
if (
(pearBooter || globalThis.Pear) &&
Object.prototype.hasOwnProperty.call(pearOnly, ent.package)
) {
return pearEntryExportValue(ent, pearOnly[ent.package])
}
if (typeof pearRequire === 'function') {
try {
const mod = pearRequire(ent.package)
return pearEntryExportValue(ent, mod)
} catch {
/* continue */
}
}
try {
const mod = await import(/* webpackIgnore: true */ ent.package)
return pearEntryExportValue(ent, mod)
} catch (directErr) {
const mod = await tryRequireFromBooter(ent.package)
if (mod !== undefined) return pearEntryExportValue(ent, mod)
throw directErr
}
}
/**
* Populate a target object with Pear-tier packages from the manifest (host import path only for v1).
* Parallel to buildBareCtxObjectFromHost but operates on pearEntries.
* @param {Record<string, string>} shellEnv
* @param {Record<string, unknown>} target
*/
export async function buildPearCtxObjectFromHost(
shellEnv,
target,
bareFallback = null
) {
// For v1 we gate on the same master bare modules flag.
// A dedicated BARE_OS_PEAR_MODULES env can be added later.
if (!bareOsBareModulesEnabled(shellEnv)) return
if (!bareOsBareHostImportsEnabled(shellEnv)) return
const { entries } = loadPearModuleManifest()
if (!entries || entries.length === 0) return
const onBare = bareHostRuntime()
const pearBooter =
typeof import.meta !== 'undefined' &&
String(import.meta.url || '').startsWith('pear:')
/** @type {Function | null} */
let pearRequire = null
if (!pearBooter) {
try {
const pkgJsonPath = bareOsBooterPackageJsonPathForCreateRequire()
if (pkgJsonPath) {
const href = pathToFileURL(pkgJsonPath).href
pearRequire = await tryBareModuleCreateRequire(href)
}
} catch (_) {}
if (!pearRequire) {
pearRequire = await tryBareModuleCreateRequire(import.meta.url)
}
}
const tasks = entries.map(async (ent) => {
if (!onBare && ent.nativeHint === true) return null
const key = ent.ctxKey
if (!key || target[key] !== undefined) return null
try {
const val = await loadPearPackageFromHost(ent, {
pearBooter,
pearRequire,
onBare
})
return { key, ent, val }
} catch (err) {
if (
bareFallback &&
typeof bareFallback === 'object' &&
bareFallback[key] !== undefined
) {
return { key, ent, val: bareFallback[key], fromFallback: true }
}
return { key, ent, err }
}
})
const settled = await Promise.all(tasks)
for (const r of settled) {
if (!r) continue
const { key, ent, val, err, fromFallback } = r
if (err) {
const pearOnly =
ent.package === 'pear-bundle' ||
ent.package === 'pear-ref' ||
ent.package === 'pear-build'
if (pearOnly && !globalThis.Pear) {
// Bare standalone has no Pear runtime; skip noisy optional failures.
continue
}
if (ent.optional && pearOnly) continue
bareOsHostBooterWarn(
'ctx_pear_module_load_failed',
`ctx.pear.${key}: failed to load "${ent.package}"`,
err?.message || String(err)
)
continue
}
if (val !== undefined) {
target[key] = val
if (fromFallback) {
target[`_${key}_fromBare`] = true
}
}
}
}
/**
* Execute trusted bundle sources that assign `globalThis.__bare_os_stdlib__[ctxKey]`.
* Fills missing keys on `target` only.
* @param {Record<string, string>} shellEnv
* @param {{ readFile: (p: string, opts?: unknown) => Promise<Uint8Array | null> }} vfs
* @param {Record<string, unknown>} target
*/
/**
* Optional `/lib/bare/bare-module-lock.json` on the system image: `{ "pins": { "ctxKey": "semver" } }`.
* Emits warnings for pins whose `ctxKey` is still missing after drive merge + host import.
* @param {{ readFile: (p: string) => Promise<Uint8Array | null> }} vfs
* @param {Record<string, unknown>} target
* @returns {Promise<string[]>}
*/
export async function verifyBareModuleLockfile(vfs, target) {
/** @type {string[]} */
const warnings = []
if (!vfs || typeof vfs.readFile !== 'function') return warnings
let buf
try {
buf = await vfs.readFile('/lib/bare/bare-module-lock.json')
} catch {
return warnings
}
if (!buf || !buf.byteLength) return warnings
let j
try {
let u8 = buf instanceof Uint8Array ? buf : new Uint8Array(buf)
if (
u8.byteLength >= 3 &&
u8[0] === 0xef &&
u8[1] === 0xbb &&
u8[2] === 0xbf
) {
u8 = u8.subarray(3)
}
j = JSON.parse(new TextDecoder().decode(u8))
} catch {
warnings.push('bare-module-lock.json: invalid JSON')
return warnings
}
const pins = j && typeof j === 'object' ? j.pins : null
if (!pins || typeof pins !== 'object') return warnings
for (const [k, ver] of Object.entries(pins)) {
if (target[k] === undefined) {
warnings.push(
`bare-module-lock: ctx.bare.${k} missing (pinned ${String(ver)})`
)
}
}
return warnings
}
/**
* esbuild IIFE assigns `__bare_os_bundle_exports__` (CJS interop object), not the
* default export itself. Entries use `export default <binding>` → `{ default: binding }`.
* @param {unknown} val
*/
function unwrapDriveBundleExport(val) {
if (val === null || val === undefined) return val
if (typeof val !== 'object') return val
if (Object.prototype.hasOwnProperty.call(val, 'default')) {
const d = /** @type {{ default?: unknown }} */ (val).default
if (d !== undefined) return d
}
return val
}
/**
* Eval a single `/lib/bare/bundles/*.js` IIFE (same as {@link maybeMergeBareFromDrive}) and
* return one `ctxKey` from `globalThis.__bare_os_stdlib__`. Does not mutate `ctx.bare`.
* Used when Pear skipped populating a key (merge short-circuit or eval failure).
*
* @param {Record<string, unknown>} ctx
* @param {{ readFile: (p: string) => Promise<Uint8Array | null> }} vfs
* @param {string} logicalPath
* @param {string} ctxKey
* @returns {Promise<unknown>}
*/
export async function tryLoadBareCtxKeyFromDriveBundlePath(
ctx,
vfs,
logicalPath,
ctxKey
) {
void ctx
if (!vfs || typeof vfs.readFile !== 'function') return undefined
if (
typeof logicalPath !== 'string' ||
!logicalPath.startsWith('/lib/bare/') ||
typeof ctxKey !== 'string' ||
!ctxKey
) {
return undefined
}
let buf
try {
buf = await vfs.readFile(logicalPath)
} catch {
return undefined
}
if (!buf || !buf.byteLength) return undefined
const text = decodeUtf8BytesBareFallback(buf)
if (text.length > 12 * 1024 * 1024) return undefined
const g = globalThis
const sym = BARE_OS_STDLIB_GLOBAL
/** @type {string | null} */
let errMsg = null
await withDriveBundleGlobalRequire(async (req) => {
g[sym] = g[sym] && typeof g[sym] === 'object' ? g[sym] : {}
try {
runDriveBundleSource(logicalPath, text, req)
} catch (err) {
errMsg =
(err && /** @type {{ message?: string }} */ (err).message) ||
String(err)
}
})
if (errMsg) {
bareOsHostBooterWarn(
'drive_bundle_eval_failed',
`tryLoadBareCtxKeyFromDriveBundlePath ${logicalPath}`,
errMsg
)
return undefined
}
const snap = g[sym]
if (!snap || typeof snap !== 'object') return undefined
if (!Object.prototype.hasOwnProperty.call(snap, ctxKey)) return undefined
return unwrapDriveBundleExport(snap[ctxKey])
}
export async function maybeMergeBareFromDrive(shellEnv, vfs, target) {
if (!bareOsBareModulesEnabled(shellEnv)) return
if (!bareOsBareDriveBundlesEnabled(shellEnv)) return
if (!vfs || typeof vfs.readFile !== 'function') return
const perfBareStdlib =
shellEnv?.BARE_OS_BOOT_PERF_DETAIL === '1' ||
shellEnv?.BARE_OS_BOOT_PERF_DETAIL === 'true'
const hrtBig =
typeof globalThis.process?.hrtime?.bigint === 'function'
? () => globalThis.process.hrtime.bigint()
: null
const t0 = perfBareStdlib && hrtBig ? hrtBig() : null
let metaBuf
try {
metaBuf = await vfs.readFile('/lib/bare/manifest.json')
} catch {
metaBuf = null
}
if (!metaBuf || metaBuf.byteLength === 0) return
let meta
try {
const text = new TextDecoder().decode(metaBuf)
meta = JSON.parse(text)
} catch {
return
}
const bundles = meta?.bundles
if (!Array.isArray(bundles)) return
const g = globalThis
const sym = BARE_OS_STDLIB_GLOBAL
g[sym] = g[sym] && typeof g[sym] === 'object' ? g[sym] : {}
const concRaw = String(
shellEnv?.BARE_OS_BARE_STDLIB_RESOLVE_CONCURRENCY ?? ''
).trim()
const concParsed = Number.parseInt(concRaw, 10)
const readConc =
Number.isFinite(concParsed) && concParsed >= 1
? Math.min(concParsed, 32)
: 4
// Standalone already host-imports packed modules. Drive IIFEs for optional
// native tooling (bare-apk, bare-ffmpeg, …) fail without their own addons —
// only chase keys that are still missing and either required or bundle:true.
const standaloneBare = String(import.meta.url || '').startsWith('bare:')
const { entries: manifestEntries } = loadBareModuleManifest()
/** @type {Map<string, { optional?: boolean, bundle?: boolean }>} */
const entByKey = new Map(manifestEntries.map((e) => [e.ctxKey, e]))
/**
* @param {string[]} keys
* @returns {string[]}
*/
const keysNeedingDrive = (keys) =>
keys.filter((k) => {
if (typeof k !== 'string' || !k || target[k] !== undefined) return false
if (!standaloneBare) return true
const ent = entByKey.get(k)
if (!ent) return true
if (ent.optional && ent.bundle !== true) return false
return true
})
await withDriveBundleGlobalRequire(async (req) => {
/** @type {{ path: string, keys: string[] }[]} */
const work = []
/** @type {Set<string>} */
const seenPaths = new Set()
let allKeysSatisfied = true
for (const b of bundles) {
const path = typeof b?.path === 'string' ? b.path : ''
const keys = Array.isArray(b?.keys) ? b.keys : []
if (!path.startsWith('/lib/bare/')) continue
if (seenPaths.has(path)) continue
seenPaths.add(path)
const needed = keysNeedingDrive(keys)
if (needed.length > 0) allKeysSatisfied = false
if (needed.length === 0) continue
work.push({ path, keys })
}
if (work.length === 0 || allKeysSatisfied) {
await tryBareFetchImportWhenDriveMissing(target)
return
}
/** @type {{ path: string, keys: string[], source: string | null }[]} */
const prepared = []
for (let i = 0; i < work.length; ) {
const slice = work.slice(i, i + readConc)
i += slice.length
const chunk = await Promise.all(
slice.map(async ({ path, keys }) => {
let srcBuf
try {
srcBuf = await vfs.readFile(path)
} catch {
srcBuf = null
}
if (!srcBuf || srcBuf.byteLength === 0) {
return { path, keys, source: null }
}
const source = new TextDecoder().decode(srcBuf)
if (source.length > 12 * 1024 * 1024) {
return { path, keys, source: null }
}
return { path, keys, source }
})
)
prepared.push(...chunk)
}
for (const { path, keys, source } of prepared) {
if (!source) continue
const stillNeeded = keysNeedingDrive(keys)
if (stillNeeded.length === 0) continue
try {
runDriveBundleSource(path, source, req)
} catch (err) {
bareOsHostBooterWarn(
'drive_bundle_eval_failed',
`drive bundle failed ${path}`,
err?.message || String(err)
)
continue
}
const snap = g[sym]
if (!snap || typeof snap !== 'object') continue
for (const k of keys) {
if (typeof k !== 'string' || !k) continue
if (target[k] !== undefined) continue
if (Object.prototype.hasOwnProperty.call(snap, k)) {
target[k] = unwrapDriveBundleExport(snap[k])
}
}
}
})
await tryBareFetchImportWhenDriveMissing(target)
if (t0 && hrtBig) {
const ns = Number(hrtBig() - t0)
bareOsHostBooterWarn(
'bare_stdlib_merge_ns',
'maybeMergeBareFromDrive wall (hrtime bigint delta ns)',
String(ns)
)
}
}
/**
* When drive `fetch.js` eval fails (no `globalThis.require` or native addons), Bare can still
* `import('bare-fetch')` from the booter — same as `buildBareCtxObjectFromHost`, but runs even
* when the manifest marks the entry host-only.
* @param {Record<string, unknown>} target
*/
async function tryBareFetchImportWhenDriveMissing(target) {
if (target.fetch !== undefined) return
if (!bareHostRuntime()) return
try {
let mod
if (typeof import.meta.resolve === 'function') {
try {
mod = await import(import.meta.resolve('bare-fetch'))
} catch {
mod = await import('bare-fetch')
}
} else {
mod = await import('bare-fetch')
}
const f = mod?.default
if (typeof f === 'function') target.fetch = f
} catch {
/* optional */
}
}