feat(compile): add --compile-autoload-tsconfig and --compile-autoload-package-json flags #25340
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Updated 7:56 AM PT - Dec 5th, 2025
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WalkthroughAdds two per-file autoload flags for tsconfig.json and package.json across build, CLI, bundler, runtime resolver, serialization, and tests; propagates these flags through StandaloneModuleGraph.Flags, CompileOptions, BundlerOptions, CLI arguments, resolver gating, and bundled executable creation. Changes
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🧰 Additional context used📓 Path-based instructions (3)test/**/*.{js,ts,jsx,tsx}📄 CodeRabbit inference engine (.cursor/rules/writing-tests.mdc)
Files:
test/**/*.test.{ts,js,jsx,tsx,mjs,cjs}📄 CodeRabbit inference engine (test/CLAUDE.md)
Files:
test/**/*.test.{ts,tsx}📄 CodeRabbit inference engine (CLAUDE.md)
Files:
🧠 Learnings (26)📓 Common learnings📚 Learning: 2025-11-14T16:07:01.064ZApplied to files:
📚 Learning: 2025-11-24T18:35:08.612ZApplied to files:
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🧬 Code graph analysis (1)test/bundler/bundler_compile_autoload.test.ts (1)
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src/bun.js.zig (1)
85-97: Runtime resolver flags correctly invert compile-time disable flags, but comment is misleadingMapping
load_tsconfig_json/load_package_jsonfrom!graph.flags.disable_autoload_*matches the intended semantics and the dotenv/bunfig pattern. However, the comment saying “disable flags default to true” is inaccurate at the type level—theFlagsstruct defaults arefalse, and those bits becometrueonly when the compile pipeline writes them as!compile_options.autoload_*. Consider rephrasing to something like “By default, standalone executables are compiled with these disable flags set to true” to make it clear this is a compile-time default, not a struct default.
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📒 Files selected for processing (10)
src/StandaloneModuleGraph.zig(1 hunks)src/bun.js.zig(1 hunks)src/bun.js/api/JSBundler.zig(2 hunks)src/bundler/bundle_v2.zig(1 hunks)src/cli.zig(1 hunks)src/cli/Arguments.zig(2 hunks)src/cli/build_command.zig(1 hunks)src/options.zig(1 hunks)src/resolver/resolver.zig(1 hunks)test/bundler/bundler_compile_autoload.test.ts(1 hunks)
🧰 Additional context used
📓 Path-based instructions (6)
src/**/*.{cpp,zig}
📄 CodeRabbit inference engine (.cursor/rules/building-bun.mdc)
src/**/*.{cpp,zig}: Usebun bdorbun run build:debugto build debug versions for C++ and Zig source files; creates debug build at./build/debug/bun-debug
Run tests usingbun bd test <test-file>with the debug build; never usebun testdirectly as it will not include your changes
Execute files usingbun bd <file> <...args>; never usebun <file>directly as it will not include your changes
Enable debug logs for specific scopes usingBUN_DEBUG_$(SCOPE)=1environment variable
Code generation happens automatically as part of the build process; no manual code generation commands are required
Files:
src/cli/build_command.zigsrc/bun.js/api/JSBundler.zigsrc/bun.js.zigsrc/cli.zigsrc/options.zigsrc/resolver/resolver.zigsrc/StandaloneModuleGraph.zigsrc/cli/Arguments.zigsrc/bundler/bundle_v2.zig
src/**/*.zig
📄 CodeRabbit inference engine (.cursor/rules/building-bun.mdc)
Use
bun.Output.scoped(.${SCOPE}, .hidden)for creating debug logs in Zig codeImplement core functionality in Zig, typically in its own directory in
src/
src/**/*.zig: Private fields in Zig are fully supported using the#prefix:struct { #foo: u32 };
Use decl literals in Zig for declaration initialization:const decl: Decl = .{ .binding = 0, .value = 0 };
Prefer@importat the bottom of the file (auto formatter will move them automatically)Be careful with memory management in Zig code - use defer for cleanup with allocators
Files:
src/cli/build_command.zigsrc/bun.js/api/JSBundler.zigsrc/bun.js.zigsrc/cli.zigsrc/options.zigsrc/resolver/resolver.zigsrc/StandaloneModuleGraph.zigsrc/cli/Arguments.zigsrc/bundler/bundle_v2.zig
**/*.zig
📄 CodeRabbit inference engine (.cursor/rules/zig-javascriptcore-classes.mdc)
**/*.zig: Expose generated bindings in Zig structs usingpub const js = JSC.Codegen.JS<ClassName>with trait conversion methods:toJS,fromJS, andfromJSDirect
Use consistent parameter nameglobalObjectinstead ofctxin Zig constructor and method implementations
Usebun.JSError!JSValuereturn type for Zig methods and constructors to enable proper error handling and exception propagation
Implement resource cleanup usingdeinit()method that releases resources, followed byfinalize()called by the GC that invokesdeinit()and frees the pointer
UseJSC.markBinding(@src())in finalize methods for debugging purposes before callingdeinit()
For methods returning cached properties in Zig, declare external C++ functions usingextern fnandcallconv(JSC.conv)calling convention
Implement getter functions with naming patternget<PropertyName>in Zig that acceptthisandglobalObjectparameters and returnJSC.JSValue
Access JavaScript CallFrame arguments usingcallFrame.argument(i), check argument count withcallFrame.argumentCount(), and getthiswithcallFrame.thisValue()
For reference-counted objects, use.deref()in finalize instead ofdestroy()to release references to other JS objects
Files:
src/cli/build_command.zigsrc/bun.js/api/JSBundler.zigsrc/bun.js.zigsrc/cli.zigsrc/options.zigsrc/resolver/resolver.zigsrc/StandaloneModuleGraph.zigsrc/cli/Arguments.zigsrc/bundler/bundle_v2.zig
test/**/*.{js,ts,jsx,tsx}
📄 CodeRabbit inference engine (.cursor/rules/writing-tests.mdc)
test/**/*.{js,ts,jsx,tsx}: Write tests as JavaScript and TypeScript files using Jest-style APIs (test,describe,expect) and import frombun:test
Usetest.eachand data-driven tests to reduce boilerplate when testing multiple similar cases
Files:
test/bundler/bundler_compile_autoload.test.ts
test/**/*.test.{ts,js,jsx,tsx,mjs,cjs}
📄 CodeRabbit inference engine (test/CLAUDE.md)
test/**/*.test.{ts,js,jsx,tsx,mjs,cjs}: Usebun:testwith files that end in*.test.{ts,js,jsx,tsx,mjs,cjs}
Do not write flaky tests. Never wait for time to pass in tests; always wait for the condition to be met instead of using an arbitrary amount of time
Never use hardcoded port numbers in tests. Always useport: 0to get a random port
Prefer concurrent tests over sequential tests usingtest.concurrentordescribe.concurrentwhen multiple tests spawn processes or write files, unless it's very difficult to make them concurrent
When spawning Bun processes in tests, usebunExeandbunEnvfromharnessto ensure the same build of Bun is used and debug logging is silenced
Use-eflag for single-file tests when spawning Bun processes
UsetempDir()from harness to create temporary directories with files for multi-file tests instead of creating files manually
Prefer async/await over callbacks in tests
When callbacks must be used and it's just a single callback, usePromise.withResolversto create a promise that can be resolved or rejected from a callback
Do not set a timeout on tests. Bun already has timeouts
UseBuffer.alloc(count, fill).toString()instead of'A'.repeat(count)to create repetitive strings in tests, as ''.repeat is very slow in debug JavaScriptCore builds
Usedescribeblocks for grouping related tests
Always useawait usingorusingto ensure proper resource cleanup in tests for APIs like Bun.listen, Bun.connect, Bun.spawn, Bun.serve, etc
Always check exit codes and test error scenarios in error tests
Usedescribe.each()for parameterized tests
UsetoMatchSnapshot()for snapshot testing
UsebeforeAll(),afterEach(),beforeEach()for setup/teardown in tests
Track resources (servers, clients) in arrays for cleanup inafterEach()
Files:
test/bundler/bundler_compile_autoload.test.ts
test/**/*.test.{ts,tsx}
📄 CodeRabbit inference engine (CLAUDE.md)
test/**/*.test.{ts,tsx}: For single-file tests in Bun test suite, prefer using-eflag overtempDir
For multi-file tests in Bun test suite, prefer usingtempDirandBun.spawn
Always useport: 0when spawning servers in tests - do not hardcode ports or use custom random port functions
UsenormalizeBunSnapshotto normalize snapshot output in tests instead of manual output comparison
Never write tests that check for no 'panic', 'uncaught exception', or similar strings in test output - that is not a valid test
UsetempDirfromharnessto create temporary directories in tests - do not usetmpdirSyncorfs.mkdtempSync
In tests, callexpect(stdout).toBe(...)beforeexpect(exitCode).toBe(0)when spawning processes for more useful error messages on failure
Do not write flaky tests - do not usesetTimeoutin tests; insteadawaitthe condition to be met since you're testing the CONDITION, not TIME PASSING
Verify your test fails withUSE_SYSTEM_BUN=1 bun test <file>and passes withbun bd test <file>- tests are not valid if they pass withUSE_SYSTEM_BUN=1
Avoid shell commands in tests - do not usefindorgrep; use Bun's Glob and built-in tools instead
Test files must end in.test.tsor.test.tsxand be created in the appropriate test folder structure
Files:
test/bundler/bundler_compile_autoload.test.ts
🧠 Learnings (37)
📓 Common learnings
Learnt from: RiskyMH
Repo: oven-sh/bun PR: 24719
File: docs/bundler/executables.mdx:527-560
Timestamp: 2025-11-14T16:07:01.064Z
Learning: In the Bun repository, certain bundler features like compile with code splitting (--compile --splitting) are CLI-only and not supported in the Bun.build() JavaScript API. Tests for CLI-only features use backend: "cli" flag (e.g., test/bundler/bundler_compile_splitting.test.ts). The CompileBuildConfig interface correctly restricts these with splitting?: never;. When documenting CLI-only bundler features, add a note clarifying they're not available via the programmatic API.
Learnt from: theshadow27
Repo: oven-sh/bun PR: 23798
File: packages/bun-otel/tsconfig.json:1-15
Timestamp: 2025-10-19T02:52:37.412Z
Learning: In the Bun repository, packages under packages/ (e.g., bun-otel) can follow a TypeScript-first pattern where package.json exports point directly to .ts files (not compiled .js files). Bun natively runs TypeScript, so consumers import .ts sources directly and receive full type information without needing compiled .d.ts declaration files. For such packages, adding "declaration": true or "outDir" in tsconfig.json is unnecessary and would break the export structure.
<!-- [remove_learning]
ceedde95-980e-4898-a2c6-40ff73913664
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/dev-server-tests.mdc:0-0
Timestamp: 2025-11-24T18:35:08.612Z
Learning: Applies to test/bake/dev/bundle.test.ts : Organize bundle tests in bundle.test.ts for tests concerning bundling bugs that only occur in DevServer
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: test/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:30.259Z
Learning: Applies to test/**/*.test.{ts,js,jsx,tsx,mjs,cjs} : When spawning Bun processes in tests, use `bunExe` and `bunEnv` from `harness` to ensure the same build of Bun is used and debug logging is silenced
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: src/js/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:11.466Z
Learning: Write JS builtins for Bun's Node.js compatibility and APIs, and run `bun bd` after changes
Learnt from: theshadow27
Repo: oven-sh/bun PR: 23798
File: packages/bun-otel/context-propagation.test.ts:1-1
Timestamp: 2025-10-19T02:44:46.354Z
Learning: In the Bun repository, standalone packages under packages/ (e.g., bun-vscode, bun-inspector-protocol, bun-plugin-yaml, bun-plugin-svelte, bun-debug-adapter-protocol, bun-otel) co-locate their tests with package source code using *.test.ts files. This follows standard npm/monorepo patterns. The test/ directory hierarchy (test/js/bun/, test/cli/, test/js/node/) is reserved for testing Bun's core runtime APIs and built-in functionality, not standalone packages.
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/writing-tests.mdc:0-0
Timestamp: 2025-11-24T18:35:50.422Z
Learning: Applies to test/cli/**/*.{js,ts,jsx,tsx} : When testing Bun as a CLI, use the `spawn` API from `bun` with the `bunExe()` and `bunEnv` from `harness` to execute Bun commands and validate exit codes, stdout, and stderr
Learnt from: Jarred-Sumner
Repo: oven-sh/bun PR: 24082
File: test/cli/test/coverage.test.ts:60-112
Timestamp: 2025-10-26T01:32:04.844Z
Learning: In the Bun repository test files (test/cli/test/*.test.ts), when spawning Bun CLI commands with Bun.spawnSync for testing, prefer using stdio: ["inherit", "inherit", "inherit"] to inherit stdio streams rather than piping them.
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: test/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:30.259Z
Learning: Applies to test/**/*.test.{ts,js,jsx,tsx,mjs,cjs} : Use `-e` flag for single-file tests when spawning Bun processes
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: src/js/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:11.466Z
Learning: Applies to src/js/{builtins,node,bun,thirdparty,internal}/**/*.{ts,js} : Use `process.platform` and `process.arch` for platform detection; these values are inlined and dead-code eliminated at build time
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: test/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:30.259Z
Learning: Applies to test/**/*.test.{ts,js,jsx,tsx,mjs,cjs} : Use `bun:test` with files that end in `*.test.{ts,js,jsx,tsx,mjs,cjs}`
Learnt from: markovejnovic
Repo: oven-sh/bun PR: 24880
File: packages/bun-vscode/package.json:382-385
Timestamp: 2025-11-20T19:51:32.288Z
Learning: In the Bun repository, dependencies may be explicitly added to package.json files (even when not directly imported in code) to force version upgrades on transitive dependencies, particularly as part of Aikido security scanner remediation to ensure vulnerable transitive dependencies resolve to patched versions.
📚 Learning: 2025-11-14T16:07:01.064Z
Learnt from: RiskyMH
Repo: oven-sh/bun PR: 24719
File: docs/bundler/executables.mdx:527-560
Timestamp: 2025-11-14T16:07:01.064Z
Learning: In the Bun repository, certain bundler features like compile with code splitting (--compile --splitting) are CLI-only and not supported in the Bun.build() JavaScript API. Tests for CLI-only features use backend: "cli" flag (e.g., test/bundler/bundler_compile_splitting.test.ts). The CompileBuildConfig interface correctly restricts these with splitting?: never;. When documenting CLI-only bundler features, add a note clarifying they're not available via the programmatic API.
Applied to files:
src/cli/build_command.zigsrc/bun.js/api/JSBundler.zigsrc/bun.js.zigsrc/cli.zigtest/bundler/bundler_compile_autoload.test.tssrc/cli/Arguments.zigsrc/bundler/bundle_v2.zig
📚 Learning: 2025-11-24T18:37:11.466Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: src/js/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:11.466Z
Learning: Applies to src/js/{builtins,node,bun,thirdparty,internal}/**/*.{ts,js} : Use `process.platform` and `process.arch` for platform detection; these values are inlined and dead-code eliminated at build time
Applied to files:
src/cli/build_command.zigsrc/bun.js.zigsrc/cli/Arguments.zig
📚 Learning: 2025-11-24T18:34:55.173Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/building-bun.mdc:0-0
Timestamp: 2025-11-24T18:34:55.173Z
Learning: Applies to src/**/*.{cpp,zig} : Use `bun bd` or `bun run build:debug` to build debug versions for C++ and Zig source files; creates debug build at `./build/debug/bun-debug`
Applied to files:
src/cli/build_command.zigsrc/bun.js.zig
📚 Learning: 2025-10-16T02:17:35.237Z
Learnt from: markovejnovic
Repo: oven-sh/bun PR: 23710
File: src/analytics.zig:15-21
Timestamp: 2025-10-16T02:17:35.237Z
Learning: In src/analytics.zig and similar files using bun.EnvVar boolean environment variables: the new EnvVar API for boolean flags (e.g., bun.EnvVar.do_not_track.get(), bun.EnvVar.ci.get()) is designed to parse and return boolean values from environment variables, not just check for their presence. This is an intentional design change from the previous presence-based checks using bun.getenvZ().
Applied to files:
src/cli/build_command.zigsrc/bun.js/api/JSBundler.zigsrc/cli.zigsrc/options.zigsrc/StandaloneModuleGraph.zigsrc/cli/Arguments.zigsrc/bundler/bundle_v2.zig
📚 Learning: 2025-11-24T18:36:08.558Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/zig-javascriptcore-classes.mdc:0-0
Timestamp: 2025-11-24T18:36:08.558Z
Learning: Applies to **/*.zig : Expose generated bindings in Zig structs using `pub const js = JSC.Codegen.JS<ClassName>` with trait conversion methods: `toJS`, `fromJS`, and `fromJSDirect`
Applied to files:
src/cli/build_command.zigsrc/bun.js/api/JSBundler.zigsrc/cli.zigsrc/cli/Arguments.zigsrc/bundler/bundle_v2.zig
📚 Learning: 2025-11-24T18:37:30.259Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: test/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:30.259Z
Learning: Applies to test/**/*.test.{ts,js,jsx,tsx,mjs,cjs} : When spawning Bun processes in tests, use `bunExe` and `bunEnv` from `harness` to ensure the same build of Bun is used and debug logging is silenced
Applied to files:
src/cli/build_command.zigsrc/bun.js.zigtest/bundler/bundler_compile_autoload.test.ts
📚 Learning: 2025-11-24T18:36:08.558Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/zig-javascriptcore-classes.mdc:0-0
Timestamp: 2025-11-24T18:36:08.558Z
Learning: Applies to src/bun.js/bindings/generated_classes_list.zig : Include new class bindings in `src/bun.js/bindings/generated_classes_list.zig` to register them with the code generator
Applied to files:
src/bun.js/api/JSBundler.zigsrc/bun.js.zigsrc/cli.zigsrc/cli/Arguments.zigsrc/bundler/bundle_v2.zig
📚 Learning: 2025-11-24T18:35:39.205Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/registering-bun-modules.mdc:0-0
Timestamp: 2025-11-24T18:35:39.205Z
Learning: Applies to src/bun.js/api/BunObject.zig : Implement getter functions in `src/bun.js/api/BunObject.zig` that return your feature, and export them in the `exportAll()` function
Applied to files:
src/bun.js/api/JSBundler.zig
📚 Learning: 2025-10-19T02:52:37.412Z
Learnt from: theshadow27
Repo: oven-sh/bun PR: 23798
File: packages/bun-otel/tsconfig.json:1-15
Timestamp: 2025-10-19T02:52:37.412Z
Learning: In the Bun repository, packages under packages/ (e.g., bun-otel) can follow a TypeScript-first pattern where package.json exports point directly to .ts files (not compiled .js files). Bun natively runs TypeScript, so consumers import .ts sources directly and receive full type information without needing compiled .d.ts declaration files. For such packages, adding "declaration": true or "outDir" in tsconfig.json is unnecessary and would break the export structure.
<!-- [remove_learning]
ceedde95-980e-4898-a2c6-40ff73913664
Applied to files:
src/bun.js/api/JSBundler.zigsrc/bun.js.zigsrc/cli.zig
📚 Learning: 2025-10-18T20:50:47.750Z
Learnt from: theshadow27
Repo: oven-sh/bun PR: 23798
File: src/bun.js/telemetry.zig:366-373
Timestamp: 2025-10-18T20:50:47.750Z
Learning: In Bun's Zig codebase (src/bun.js/bindings/JSValue.zig), the JSValue enum uses `.null` (not `.js_null`) for JavaScript's null value. Only `js_undefined` has the `js_` prefix to avoid collision with Zig's built-in `undefined` keyword. The correct enum fields are: `js_undefined`, `null`, `true`, `false`, and `zero`.
Applied to files:
src/bun.js/api/JSBundler.zig
📚 Learning: 2025-11-24T18:35:39.205Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/registering-bun-modules.mdc:0-0
Timestamp: 2025-11-24T18:35:39.205Z
Learning: Applies to **/*js_bindings.classes.ts : Use `JSC.Codegen` correctly to generate necessary binding code for JavaScript-Zig integration
Applied to files:
src/bun.js/api/JSBundler.zig
📚 Learning: 2025-11-24T18:36:08.558Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/zig-javascriptcore-classes.mdc:0-0
Timestamp: 2025-11-24T18:36:08.558Z
Learning: Applies to **/*.zig : Use `bun.JSError!JSValue` return type for Zig methods and constructors to enable proper error handling and exception propagation
Applied to files:
src/bun.js/api/JSBundler.zig
📚 Learning: 2025-11-24T18:35:25.883Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/javascriptcore-class.mdc:0-0
Timestamp: 2025-11-24T18:35:25.883Z
Learning: Applies to *.zig : In Zig, declare external C++ functions and wrap them in public methods using the convention `extern fn Bun__ClassName__toJS(...)` and `pub fn toJS(...)`
Applied to files:
src/bun.js/api/JSBundler.zig
📚 Learning: 2025-11-20T19:51:32.288Z
Learnt from: markovejnovic
Repo: oven-sh/bun PR: 24880
File: packages/bun-vscode/package.json:382-385
Timestamp: 2025-11-20T19:51:32.288Z
Learning: In the Bun repository, dependencies may be explicitly added to package.json files (even when not directly imported in code) to force version upgrades on transitive dependencies, particularly as part of Aikido security scanner remediation to ensure vulnerable transitive dependencies resolve to patched versions.
Applied to files:
src/bun.js.zigsrc/options.zigsrc/resolver/resolver.zig
📚 Learning: 2025-11-24T18:37:11.466Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: src/js/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:11.466Z
Learning: Write JS builtins for Bun's Node.js compatibility and APIs, and run `bun bd` after changes
Applied to files:
src/bun.js.zig
📚 Learning: 2025-10-19T02:44:46.354Z
Learnt from: theshadow27
Repo: oven-sh/bun PR: 23798
File: packages/bun-otel/context-propagation.test.ts:1-1
Timestamp: 2025-10-19T02:44:46.354Z
Learning: In the Bun repository, standalone packages under packages/ (e.g., bun-vscode, bun-inspector-protocol, bun-plugin-yaml, bun-plugin-svelte, bun-debug-adapter-protocol, bun-otel) co-locate their tests with package source code using *.test.ts files. This follows standard npm/monorepo patterns. The test/ directory hierarchy (test/js/bun/, test/cli/, test/js/node/) is reserved for testing Bun's core runtime APIs and built-in functionality, not standalone packages.
Applied to files:
src/bun.js.zigtest/bundler/bundler_compile_autoload.test.ts
📚 Learning: 2025-11-24T18:34:55.173Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/building-bun.mdc:0-0
Timestamp: 2025-11-24T18:34:55.173Z
Learning: Applies to src/**/*.{cpp,zig} : Execute files using `bun bd <file> <...args>`; never use `bun <file>` directly as it will not include your changes
Applied to files:
src/bun.js.zig
📚 Learning: 2025-11-24T18:35:39.205Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/registering-bun-modules.mdc:0-0
Timestamp: 2025-11-24T18:35:39.205Z
Learning: Add tests for new Bun runtime functionality
Applied to files:
src/bun.js.zigtest/bundler/bundler_compile_autoload.test.ts
📚 Learning: 2025-11-24T18:35:08.612Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/dev-server-tests.mdc:0-0
Timestamp: 2025-11-24T18:35:08.612Z
Learning: Applies to test/bake/dev/bundle.test.ts : Organize bundle tests in bundle.test.ts for tests concerning bundling bugs that only occur in DevServer
Applied to files:
src/bun.js.zigtest/bundler/bundler_compile_autoload.test.tssrc/cli/Arguments.zig
📚 Learning: 2025-11-24T18:37:11.466Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: src/js/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:11.466Z
Learning: Applies to src/js/{builtins,node,bun,thirdparty,internal}/**/*.{ts,js} : Use `$debug()` for debug logging and `$assert()` for assertions; both are stripped in release builds
Applied to files:
src/bun.js.zig
📚 Learning: 2025-11-24T18:36:38.104Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: src/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:36:38.104Z
Learning: Applies to src/**/*.zig : Private fields in Zig are fully supported using the `#` prefix: `struct { #foo: u32 };`
Applied to files:
src/cli.zig
📚 Learning: 2025-11-24T18:36:59.706Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: src/bun.js/bindings/v8/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:36:59.706Z
Learning: Applies to src/bun.js/bindings/v8/src/napi/napi.zig : For each new V8 C++ method, add both GCC/Clang and MSVC mangled symbol names to the V8API struct in src/napi/napi.zig using extern fn declarations
Applied to files:
src/cli.zigsrc/cli/Arguments.zigsrc/bundler/bundle_v2.zig
📚 Learning: 2025-10-15T22:03:50.832Z
Learnt from: markovejnovic
Repo: oven-sh/bun PR: 23710
File: src/envvars.zig:135-144
Timestamp: 2025-10-15T22:03:50.832Z
Learning: In src/envvars.zig, the boolean feature flag cache uses a single atomic enum and should remain monotonic. Only the string cache (which uses two atomics: ptr and len) requires acquire/release ordering to prevent torn reads.
Applied to files:
src/StandaloneModuleGraph.zig
📚 Learning: 2025-10-15T20:19:38.580Z
Learnt from: markovejnovic
Repo: oven-sh/bun PR: 23680
File: cmake/targets/BuildBun.cmake:822-822
Timestamp: 2025-10-15T20:19:38.580Z
Learning: In the Bun codebase, FFI is compiled with tcc (TinyCC), which barely supports C99. The headers `src/bun.js/api/FFI.h` and `src/bun.js/api/ffi-stdbool.h` are only used for FFI compilation with tcc, not for the main Bun target. Therefore, C23 compatibility concerns (such as bool/true/false keyword conflicts) do not apply to these FFI headers.
Applied to files:
src/StandaloneModuleGraph.zig
📚 Learning: 2025-10-30T21:52:04.707Z
Learnt from: pfgithub
Repo: oven-sh/bun PR: 24212
File: src/cli/publish_command.zig:782-788
Timestamp: 2025-10-30T21:52:04.707Z
Learning: In the Bun codebase (oven-sh/bun), `enable_ansi_colors` flags are used to gate both ANSI color codes and Unicode box-drawing characters/emoji. This is the established pattern across the codebase.
Applied to files:
src/StandaloneModuleGraph.zig
📚 Learning: 2025-11-24T18:35:08.612Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/dev-server-tests.mdc:0-0
Timestamp: 2025-11-24T18:35:08.612Z
Learning: Applies to test/bake/dev/esm.test.ts : Organize ESM tests in esm.test.ts for tests about various ESM features in development mode
Applied to files:
test/bundler/bundler_compile_autoload.test.ts
📚 Learning: 2025-11-24T18:35:08.612Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/dev-server-tests.mdc:0-0
Timestamp: 2025-11-24T18:35:08.612Z
Learning: Applies to test/bake/dev/css.test.ts : Organize CSS tests in css.test.ts for tests concerning bundling bugs with CSS files
Applied to files:
test/bundler/bundler_compile_autoload.test.ts
📚 Learning: 2025-11-24T18:36:59.706Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: src/bun.js/bindings/v8/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:36:59.706Z
Learning: Applies to src/bun.js/bindings/v8/test/v8/v8.test.ts : Add corresponding test cases to test/v8/v8.test.ts using checkSameOutput() function to compare Node.js and Bun output
Applied to files:
test/bundler/bundler_compile_autoload.test.ts
📚 Learning: 2025-11-24T18:35:08.612Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/dev-server-tests.mdc:0-0
Timestamp: 2025-11-24T18:35:08.612Z
Learning: Applies to test/bake/dev/sourcemap.test.ts : Organize source-map tests in sourcemap.test.ts for tests verifying source-maps are correct
Applied to files:
test/bundler/bundler_compile_autoload.test.ts
📚 Learning: 2025-11-24T18:35:08.612Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/dev-server-tests.mdc:0-0
Timestamp: 2025-11-24T18:35:08.612Z
Learning: Applies to test/bake/**/*.test.ts : Explicitly annotate hard-reloads with `expectReload()` to tell the test framework that a page reload is expected; all other hard reloads automatically fail the test
Applied to files:
test/bundler/bundler_compile_autoload.test.ts
📚 Learning: 2025-12-02T05:59:51.485Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-12-02T05:59:51.485Z
Learning: Applies to test/**/*.test.{ts,tsx} : Verify your test fails with `USE_SYSTEM_BUN=1 bun test <file>` and passes with `bun bd test <file>` - tests are not valid if they pass with `USE_SYSTEM_BUN=1`
Applied to files:
test/bundler/bundler_compile_autoload.test.ts
📚 Learning: 2025-12-02T05:59:51.485Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: CLAUDE.md:0-0
Timestamp: 2025-12-02T05:59:51.485Z
Learning: Applies to test/**/*.test.{ts,tsx} : For multi-file tests in Bun test suite, prefer using `tempDir` and `Bun.spawn`
Applied to files:
test/bundler/bundler_compile_autoload.test.ts
📚 Learning: 2025-11-24T18:37:30.259Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: test/CLAUDE.md:0-0
Timestamp: 2025-11-24T18:37:30.259Z
Learning: Applies to test/**/*.test.{ts,js,jsx,tsx,mjs,cjs} : Use `bun:test` with files that end in `*.test.{ts,js,jsx,tsx,mjs,cjs}`
Applied to files:
test/bundler/bundler_compile_autoload.test.ts
📚 Learning: 2025-11-24T18:35:08.612Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/dev-server-tests.mdc:0-0
Timestamp: 2025-11-24T18:35:08.612Z
Learning: Applies to test/bake/dev/ecosystem.test.ts : Organize ecosystem tests in ecosystem.test.ts for tests involving ensuring certain libraries are correct; prefer testing concrete bugs over testing entire packages
Applied to files:
test/bundler/bundler_compile_autoload.test.ts
📚 Learning: 2025-11-24T18:36:08.558Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/zig-javascriptcore-classes.mdc:0-0
Timestamp: 2025-11-24T18:36:08.558Z
Learning: Applies to **/*.zig : Use consistent parameter name `globalObject` instead of `ctx` in Zig constructor and method implementations
Applied to files:
src/cli/Arguments.zig
📚 Learning: 2025-11-24T18:35:39.205Z
Learnt from: CR
Repo: oven-sh/bun PR: 0
File: .cursor/rules/registering-bun-modules.mdc:0-0
Timestamp: 2025-11-24T18:35:39.205Z
Learning: Applies to src/**/index.zig : Create an `index.zig` entry point in your module directory that exports all module functionality
Applied to files:
src/bundler/bundle_v2.zig
🧬 Code graph analysis (1)
test/bundler/bundler_compile_autoload.test.ts (1)
test/bundler/expectBundled.ts (1)
itBundled(1752-1786)
🔇 Additional comments (8)
src/StandaloneModuleGraph.zig (1)
296-302: Flag packing and serialization remain consistentExtending
Flagswith two more booleans and adjusting_paddingtou28keeps the packed size at 32 bits and preserves the existingOffsetsABI; older graphs will just see the new bits asfalse, which is safe. The newdisable_autoload_tsconfig/disable_autoload_package_jsonflags also follow the existing.disable_*convention.src/bundler/bundle_v2.zig (1)
2041-2051: Compile-time → standalone flag wiring matches existing patternPassing
.disable_autoload_tsconfig = !compile_options.autoload_tsconfigand.disable_autoload_package_json = !compile_options.autoload_package_jsonalongside the existing dotenv/bunfig flags keeps the disable/enable semantics consistent end-to-end between JS API/CLI and the embeddedStandaloneModuleGraph. The implementation looks correct and in line with the PR’s intent.src/cli/build_command.zig (1)
444-448: Wiring new autoload flags into StandaloneModuleGraph is consistent and correctThe new
.disable_autoload_tsconfigand.disable_autoload_package_jsonflags follow the existing inversion pattern used for dotenv/bunfig, socompile_autoload_* = false(the new default) correctly results in autoload being disabled at runtime for standalone executables.src/options.zig (1)
1774-1776: Newload_package_jsontoggle matches existing tsconfig controlAdding
load_package_json: bool = truealongsideload_tsconfig_jsoncleanly introduces a resolver gate for package.json loading while preserving prior default behavior.src/cli.zig (1)
459-467: Defaultingcompile_autoload_*to false is a behavioral change—confirm and documentThese new fields default to
false, sobun build --compilestandalone binaries will no longer autoloadtsconfig.jsonorpackage.jsonat runtime unless the user explicitly passes--compile-autoload-tsconfig/--compile-autoload-package-json(or config equivalents). That matches the PR’s stated goal but is a breaking change compared to previous behavior; please ensure this is clearly documented in the build/standalone docs and CLI help so users understand why compiled binaries stop picking up runtime config changes.src/bun.js/api/JSBundler.zig (1)
60-64: JSCompileOptionsautoload fields are wired consistently with existing optionsThe added
autoload_tsconfig/autoload_package_jsonfields default tofalseand are parsed viagetBooleanLoose("autoloadTsconfig" / "autoloadPackageJson"), mirroring the existingautoloadDotenv/autoloadBunfigpattern. This gives Bun.build callers explicit, opt‑in control over runtime tsconfig/package.json loading for standalone builds without affecting other compile options.Also applies to: 192-198
src/resolver/resolver.zig (1)
4124-4154: Package.json discovery correctly gated onload_package_jsonWrapping the existing
package.jsondetection/parsing inif (r.opts.load_package_json)cleanly disables runtime package.json loading for resolvers configured that way, while preserving prior behavior when the flag is true. The pattern matches the existingload_tsconfig_jsongating and all consumers already toleratepackage_json-related fields being null.src/cli/Arguments.zig (1)
148-159: New--compile-autoload-*flags integrate correctly with build parsingThe additions for
--compile-autoload-tsconfig/--no-compile-autoload-tsconfigand--compile-autoload-package-json/--no-compile-autoload-package-jsonlook consistent with the existing dotenv/bunfig pattern:
- Help text matches the intended semantics (runtime autoload control on standalone executables, defaulting to disabled).
- Parsing enforces
--compileas a prerequisite and rejects conflicting positive/negative combinations.ctx.bundler_options.compile_autoload_tsconfig/_package_jsonbeing set tohas_positivealigns with the documented default=false behavior.No issues spotted in how these options are surfaced or validated.
Also applies to: 1070-1104
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…-package-json flags By default, standalone executables no longer load tsconfig.json and package.json at runtime. This improves startup performance and prevents unexpected behavior from config files in the runtime environment. New CLI flags: - --compile-autoload-tsconfig / --no-compile-autoload-tsconfig (default: false) - --compile-autoload-package-json / --no-compile-autoload-package-json (default: false) New JS API options in compile config: - autoloadTsconfig: boolean (default: false) - autoloadPackageJson: boolean (default: false) The flags are stored in StandaloneModuleGraph.Flags and applied at runtime boot, consistent with the existing dotenv and bunfig autoload options. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
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Addressed review feedback:
The tests now verify:
Note: The primary value of this change is performance (avoiding unnecessary file I/O) and isolation (preventing confusion from runtime configs). The actual behavior impact is minimal since bundled code doesn't rely on runtime config files for module resolution. |
| }); | ||
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| // Test CLI backend with autoloadPackageJson: true | ||
| itBundled("compile/AutoloadPackageJsonCLI", { |
There was a problem hiding this comment.
These tests do not test anything. Update the tests to instead load an external package.json and tsconfig.json and then try to import a file to it using tsconfig.json "paths" and package.json "exports"
…actual behavior Update tests to actually verify that tsconfig.json paths and package.json exports are loaded (or not loaded) at runtime: - AutoloadTsconfigPathsEnabled: Verifies dynamic imports resolve using tsconfig.json paths when autoloadTsconfig: true - AutoloadTsconfigPathsDisabled: Verifies dynamic imports fail without tsconfig.json paths when autoloadTsconfig: false - AutoloadPackageJsonExportsEnabled: Verifies dynamic imports resolve using package.json exports when autoloadPackageJson: true - AutoloadPackageJsonExportsDisabled: Verifies dynamic imports fail without package.json exports when autoloadPackageJson: false - CLI backend variants for both features - Combined test with both features enabled Also adds CLI support for --compile-autoload-tsconfig and --compile-autoload-package-json flags in test harness. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <[email protected]>
Summary
By default, standalone executables no longer load
tsconfig.jsonandpackage.jsonat runtime. This improves startup performance and prevents unexpected behavior from config files in the runtime environment.--compile-autoload-tsconfig/--no-compile-autoload-tsconfigCLI flags (default: false)--compile-autoload-package-json/--no-compile-autoload-package-jsonCLI flags (default: false)autoloadTsconfigandautoloadPackageJsonoptions to theBun.build()compile configStandaloneModuleGraph.Flagsand applied at runtime bootThis follows the same pattern as the existing
--compile-autoload-dotenvand--compile-autoload-bunfigflags.Test plan
test/bundler/bundler_compile_autoload.test.ts🤖 Generated with Claude Code