mirror of
https://github.com/oven-sh/bun
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7c485177ee
## Summary
This PR adds two new compile options to control whether standalone
executables autoload `.env` files and `bunfig.toml` configuration files.
## New Options
### JavaScript API
```js
await Bun.build({
entrypoints: ["./entry.ts"],
compile: {
autoloadDotenv: false, // Disable .env loading (default: true)
autoloadBunfig: false, // Disable bunfig.toml loading (default: true)
}
});
```
### CLI Flags
```bash
bun build --compile --no-compile-autoload-dotenv entry.ts
bun build --compile --no-compile-autoload-bunfig entry.ts
bun build --compile --compile-autoload-dotenv entry.ts
bun build --compile --compile-autoload-bunfig entry.ts
```
## Implementation
The flags are stored in a new `Flags` packed struct in
`StandaloneModuleGraph`:
```zig
pub const Flags = packed struct(u32) {
disable_default_env_files: bool = false,
disable_autoload_bunfig: bool = false,
_padding: u30 = 0,
};
```
These flags are:
1. Set during compilation from CLI args or JS API options
2. Serialized into the `StandaloneModuleGraph` embedded in the
executable
3. Read at runtime in `bootStandalone()` to conditionally load config
files
## Testing
Manually tested and verified:
- ✅ Default behavior loads `.env` files
- ✅ `--no-compile-autoload-dotenv` disables `.env` loading
- ✅ `--compile-autoload-dotenv` explicitly enables `.env` loading
- ✅ Default behavior loads `bunfig.toml` (verified with preload script)
- ✅ `--no-compile-autoload-bunfig` disables `bunfig.toml` loading
Test cases added in `test/bundler/bundler_compile_autoload.test.ts`
## Files Changed
- `src/StandaloneModuleGraph.zig` - Added Flags struct, updated
encode/decode
- `src/bun.js.zig` - Checks flags in bootStandalone()
- `src/bun.js/api/JSBundler.zig` - Added autoload options to
CompileOptions
- `src/bundler/bundle_v2.zig` - Pass flags to toExecutable()
- `src/cli.zig` - Added flags to BundlerOptions
- `src/cli/Arguments.zig` - Added CLI argument parsing
- `src/cli/build_command.zig` - Pass flags from context
- `test/bundler/expectBundled.ts` - Support new compile options
- `test/bundler/bundler_compile_autoload.test.ts` - New test file
---------
Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Jarred Sumner <jarred@jarredsumner.com>