fix(cjs-wrap): resolve built-in requires through createRequire, not dropped ESM imports - #8341
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proggeramlug merged 1 commit intoAug 18, 2026
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The CJS-to-ESM wrap hoists require("process") and other Node.js built-in
requires as static ESM imports. The codegen does not initialize native-module
import bindings inside CJS-wrapped modules, so the hoisted binding is undefined
at runtime — causing ReferenceError when the module tries to use it.
Three changes in wrap.rs:
1. Don't adopt aliases for built-in specs. Keeping the alias un-adopted means
the declaration (e.g. let node_process = require("process")) stays in the
IIFE body and goes through the synthetic require function.
2. Don't blank built-in alias declarations in the hoisted-classes path. Same
rationale: the declaration must survive so the synthetic require handles it.
3. Use createRequire for built-in modules in the synthetic require function.
Both the per-spec cases and a runtime fallback check __perry_cjs_require_is_builtin
and resolve via __perry_cjs_create_require(path)(specifier), which calls
js_create_native_module_namespace under the hood.
Also fixes circular-dependency detection to use globalThis.process?.emitWarning?.()
instead of process.emitWarning(), which crashes when process is not a global.
Verified: a standalone CJS file with require("process"), require("os"), and
require("path") now compiles and runs correctly, printing platform/os/path values.
📝 WalkthroughWalkthroughCommonJS wrapping now detects Node.js built-in modules, preserves their aliases, and resolves them through runtime ChangesCommonJS built-in resolution
Estimated code review effort: 2 (Simple) | ~15 minutes Merge Risk: 🟠 High · up to The change restores built-in CommonJS requires through the runtime resolver, but current handling still misclassifies unsupported subpaths and misses several supported built-ins, which can break dependent programs during compilation or execution. These correctness gaps should be fixed before merge. Possibly related PRs
Suggested labels: Suggested reviewers: 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
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Inline comments:
In `@crates/perry/src/commands/compile/cjs_wrap/wrap.rs`:
- Around line 155-168: The built-in module predicate currently matches
unsupported subpaths by checking the truncated base name. In the
builtin-requires handling and the corresponding checks near the symbols using
`normalized` and `base`, pass the complete normalized specifier to
`perry_hir::is_node_builtin_module` instead of `base`, preserving valid entries
such as `fs/promises` and `path/win32` while allowing unsupported paths to use
compiled-module resolution.
Apply the same fix in `@crates/perry/src/commands/compile/cjs_wrap/wrap.rs` around
lines 300 - 310.
- Around line 944-950: The __perry_cjs_require_is_builtin predicate should be
generated from the complete runtime-supported CJS builtin spelling set,
including dgram, diagnostics_channel, fs/promises, inspector, repl, stream/web,
tls, v8, vm, wasi, and their node: forms. Include node:sea and node:sqlite while
preserving scheme-only handling for node:sea, node:sqlite, node:test, and
node:test/reporters, so computed require and require.resolve use the runtime
builtin resolver.
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crates/perry/src/commands/compile/cjs_wrap/wrap.rs
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proggeramlug
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Aug 18, 2026
…apped modules (#8343) * fix(cjs-wrap): resolve Node.js built-in requires via createRequire at runtime The CJS-to-ESM wrap hoists require("process") and other Node.js built-in requires as static ESM imports. The codegen does not initialize native-module import bindings inside CJS-wrapped modules, so the hoisted binding is undefined at runtime — causing ReferenceError when the module tries to use it. Three changes in wrap.rs: 1. Don't adopt aliases for built-in specs. Keeping the alias un-adopted means the declaration (e.g. let node_process = require("process")) stays in the IIFE body and goes through the synthetic require function. 2. Don't blank built-in alias declarations in the hoisted-classes path. Same rationale: the declaration must survive so the synthetic require handles it. 3. Use createRequire for built-in modules in the synthetic require function. Both the per-spec cases and a runtime fallback check __perry_cjs_require_is_builtin and resolve via __perry_cjs_create_require(path)(specifier), which calls js_create_native_module_namespace under the hood. Also fixes circular-dependency detection to use globalThis.process?.emitWarning?.() instead of process.emitWarning(), which crashes when process is not a global. Verified: a standalone CJS file with require("process"), require("os"), and require("path") now compiles and runs correctly, printing platform/os/path values. * fix(cjs-wrap): stop HIR from dropping built-in require bindings in wrapped modules #8341 made the CJS wrap route built-in requires (require("process")) through the synthetic require's createRequire arm instead of the hoisted static import binding, and skipped alias adoption/blanking for built-ins. But sdxgen still threw "ReferenceError: node_process is not defined" on every invocation because the HIR intercepted the require BEFORE the wrap's runtime path could run. Root cause: the HIR's destructuring var/let/const pass (register_native_fetch_and_streams / register_destructured_stream_ctors) rewrites `let node_process = require("process")` into a native-module namespace binding (register_require_namespace_binding then remove_local_binding), mirroring `import * as node_process from "process"`. This runs BEFORE call lowering, so the lookup_local("require") guard in try_require_literal never fires. The codegen does not initialize native-module import bindings inside CJS-wrapped modules, so node_process resolves to nothing at runtime -- the ReferenceError. Fix (three parts): 1. HIR: gate the destructuring native-require fast paths on require being the bare global (not shadowed by the wrap's synthetic function require), via a new require_is_shadowed_by_local helper that mirrors try_require_literal's guard. When shadowed, the require("<builtin>") call flows through to the synthetic require, which resolves builtins via createRequire. 2. wrap: stop emitting `import _req_N from '<builtin>'` for built-in specs -- the binding is never initialized and is now unreferenced. 3. wrap: the per-spec require case for builtins never references the (now nonexistent) import local -- always go through the createRequire-backed required_value, including the try-site branch (skip the typeof {local} === 'boolean' sentinel guard, which does not apply to builtins). Verified: minimal CJS witnesses (const p = require("process"); console.log(p.platform), the rolldown __toESM shape, and the destructured const { platform } = require("process")) compile, link, and print darwin. sdxgen --help exits 0.
This was referenced Aug 18, 2026
jdalton
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Aug 18, 2026
…ort bindings Follow-up to PerryTS#8341, PerryTS#8343, PerryTS#8369, and PerryTS#8338 addressing review findings on the merged cjs-wrap builtin-require chain. * Generate the __perry_cjs_require_is_builtin switch cases from the shared perry_hir::NODE_BUILTIN_MODULES table instead of a hardcoded list. The hardcoded list omitted 16 entries (tls, dgram, diagnostics_channel, domain, fs/promises, inspector, inspector/promises, repl, stream/consumers, stream/web, trace_events, v8, vm, wasi, sea, sqlite), so a computed require(specifier) for one of those fell through to compiled-module resolution and raised MODULE_NOT_FOUND instead of routing through createRequire. Re-export NODE_BUILTIN_MODULES from perry-hir so the perry crate can build the predicate. * Back built-in named re-exports with _cjs.<name> instead of the dropped import _req_N binding. PerryTS#8343 stopped hoisting `import _req_N from '<builtin>'`, but direct_named_reexports still emitted `export { _req_N as name }` for `exports.name = require('<builtin>')`, referencing an undeclared ESM binding. The IIFE body populates _cjs.name via the synthetic require's createRequire arm, so the re-export now reads that, matching named_export_decls. * Match the complete normalized specifier (fs/promises, path/win32) rather than the truncated base name when classifying built-ins, so unsupported subpaths such as fs/unknown fall through to compiled- module resolution instead of being routed to createRequire. * Route the rolldown __toESM regression test through the synthetic class reference (ctor) so Object.getPrototypeOf(ctor) takes the class-id-tagged branch the sentinel-suppression fix changed; without it the heap-pointer path hid a regression. * Use std::path::MAIN_SEPARATOR in the builtin-require test assertions so path.join('a','b') expectations hold on Windows. * Serialize env mutation in optional_framework_dir_tests::env_var_takes_precedence_over_perry_toml with the shared env_lock() so it cannot race the other env-touching tests in the same binary. Add a regression test for computed require of a previously-missing built-in (domain).
jdalton
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to jdalton/perry
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Aug 18, 2026
…ort bindings Follow-up to PerryTS#8341, PerryTS#8343, PerryTS#8369, and PerryTS#8338 addressing review findings on the merged cjs-wrap builtin-require chain. * Generate the __perry_cjs_require_is_builtin switch cases from the shared perry_hir::NODE_BUILTIN_MODULES table instead of a hardcoded list. The hardcoded list omitted 16 entries (tls, dgram, diagnostics_channel, domain, fs/promises, inspector, inspector/promises, repl, stream/consumers, stream/web, trace_events, v8, vm, wasi, sea, sqlite), so a computed require(specifier) for one of those fell through to compiled-module resolution and raised MODULE_NOT_FOUND instead of routing through createRequire. Re-export NODE_BUILTIN_MODULES from perry-hir so the perry crate can build the predicate. * Back built-in named re-exports with _cjs.<name> instead of the dropped import _req_N binding. PerryTS#8343 stopped hoisting `import _req_N from '<builtin>'`, but direct_named_reexports still emitted `export { _req_N as name }` for `exports.name = require('<builtin>')`, referencing an undeclared ESM binding. The IIFE body populates _cjs.name via the synthetic require's createRequire arm, so the re-export now reads that, matching named_export_decls. * Match the complete normalized specifier (fs/promises, path/win32) rather than the truncated base name when classifying built-ins, so unsupported subpaths such as fs/unknown fall through to compiled- module resolution instead of being routed to createRequire. * Route the rolldown __toESM regression test through the synthetic class reference (ctor) so Object.getPrototypeOf(ctor) takes the class-id-tagged branch the sentinel-suppression fix changed; without it the heap-pointer path hid a regression. * Use std::path::MAIN_SEPARATOR in the builtin-require test assertions so path.join('a','b') expectations hold on Windows. * Serialize env mutation in optional_framework_dir_tests::env_var_takes_precedence_over_perry_toml with the shared env_lock() so it cannot race the other env-touching tests in the same binary. Add a regression test for computed require of a previously-missing built-in (domain).
proggeramlug
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Aug 18, 2026
…ort bindings (#8380) Follow-up to #8341, #8343, #8369, and #8338 addressing review findings on the merged cjs-wrap builtin-require chain. * Generate the __perry_cjs_require_is_builtin switch cases from the shared perry_hir::NODE_BUILTIN_MODULES table instead of a hardcoded list. The hardcoded list omitted 16 entries (tls, dgram, diagnostics_channel, domain, fs/promises, inspector, inspector/promises, repl, stream/consumers, stream/web, trace_events, v8, vm, wasi, sea, sqlite), so a computed require(specifier) for one of those fell through to compiled-module resolution and raised MODULE_NOT_FOUND instead of routing through createRequire. Re-export NODE_BUILTIN_MODULES from perry-hir so the perry crate can build the predicate. * Back built-in named re-exports with _cjs.<name> instead of the dropped import _req_N binding. #8343 stopped hoisting `import _req_N from '<builtin>'`, but direct_named_reexports still emitted `export { _req_N as name }` for `exports.name = require('<builtin>')`, referencing an undeclared ESM binding. The IIFE body populates _cjs.name via the synthetic require's createRequire arm, so the re-export now reads that, matching named_export_decls. * Match the complete normalized specifier (fs/promises, path/win32) rather than the truncated base name when classifying built-ins, so unsupported subpaths such as fs/unknown fall through to compiled- module resolution instead of being routed to createRequire. * Route the rolldown __toESM regression test through the synthetic class reference (ctor) so Object.getPrototypeOf(ctor) takes the class-id-tagged branch the sentinel-suppression fix changed; without it the heap-pointer path hid a regression. * Use std::path::MAIN_SEPARATOR in the builtin-require test assertions so path.join('a','b') expectations hold on Windows. * Serialize env mutation in optional_framework_dir_tests::env_var_takes_precedence_over_perry_toml with the shared env_lock() so it cannot race the other env-touching tests in the same binary. Add a regression test for computed require of a previously-missing built-in (domain).
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Fixes a CJS-wrap bug that blocks sdxgen (and any program whose deps use built-in requires through the wrap):
ReferenceError: node_process is not defined.Root cause
For built-in requires (
process,os,tty,async_hooks,util,readline,path), the CJS wrap generates ESM imports (import _req_0 from 'process'), but the HIR's native-module resolution drops those imports entirely without generating the native module namespace initialization to replace them. Meanwhile the wrap's alias-blanking still blankslet node_process = require("process"). Result: the alias is gone but the replacement binding_req_0doesn't exist, so any reference tonode_processthrowsReferenceError.Hit concretely by
@socketsecurity/lib'sexternal-pack.js:62(let node_process = require("process")) when compiling sdxgen.Fix
Skip built-in specs from both the import generation and the alias blanking, and rely on the synthetic require's existing
createRequirefallback for builtins:import _req_N from 'process'for built-in specs (these imports are dropped by HIR).let node_process = require("process")for built-in specs, so the require flows through the synthetic require.createRequire— that path is correct.Verified: sdxgen compiles AND links with this fix (plus the wasm-host and keep-alive provisioning fixes in #8337 / #8338), and
external-pack.js'snode_processresolves correctly instead of throwing.Summary by CodeRabbit
requireimports instead of incorrectly modifying them.