Crates.io | rspack_resolver |
lib.rs | rspack_resolver |
version | 0.1.0 |
source | src |
created_at | 2024-07-07 06:20:35.839006 |
updated_at | 2024-07-07 06:20:35.839006 |
description | ESM / CJS module resolution |
homepage | https://github.com/web-infra-dev/rspack-resolver |
repository | https://github.com/web-infra-dev/rspack-resolver |
max_upload_size | |
id | 1294586 |
size | 421,063 |
[!NOTE]
This is a fork of oxc-resolver, and will be used in Rspack cause 100% compatible with enhanced-resolve it the non-goal of oxc-resolver itself, we may add enhanced-resolve specific features likepnp support
andalternative support
in the future.
Rust port of [enhanced-resolve].
tsconfig.extends
tsconfig.compilerOptions.paths
tsconfig.references
FileSystem
traittracing
instrumentationThe following usages apply to both Rust and Node.js; the code snippets are written in JavaScript.
To handle the exports
field in package.json
, ESM and CJS need to be differentiated.
defaultConditions is the conditional environment name array, ["node", "import"].
This means when the caller is an ESM import (import "module"
), resolve options should be
{
"conditionNames": ["node", "import"]
}
LOAD_PACKAGE_EXPORTS(X, DIR)
- let MATCH = PACKAGE_EXPORTS_RESOLVE(pathToFileURL(DIR/NAME), "." + SUBPATH,
package.json
"exports", ["node", "require"]) defined in the ESM resolver.
This means when the caller is a CJS require (require("module")
), resolve options should be
{
"conditionNames": ["node", "require"]
}
To support both CJS and ESM with the same cache:
const esmResolver = ResolverFactory({
conditionNames: ["node", "import"]
});
const cjsResolver = esmResolver.cloneWithOptions({
conditionNames: ["node", "require"]
});
From this non-standard spec:
The
browser
field is provided to JavaScript bundlers or component tools when packaging modules for client side use.
The option is
{
"aliasFields": ["browser"]
}
{
"mainFields": ["module", "main"]
}
Quoting esbuild's documentation:
main
- This is the standard field for all packages that are meant to be used with node. The name main is hard-coded in to node's module resolution logic itself. Because it's intended for use with node, it's reasonable to expect that the file path in this field is a CommonJS-style module.module
- This field came from a proposal for how to integrate ECMAScript modules into node. Because of this, it's reasonable to expect that the file path in this field is an ECMAScript-style module. This proposal wasn't adopted by node (node uses "type": "module" instead) but it was adopted by major bundlers because ECMAScript-style modules lead to better tree shaking, or dead code removal.browser
- This field came from a proposal that allows bundlers to replace node-specific files or modules with their browser-friendly versions. It lets you specify an alternate browser-specific entry point. Note that it is possible for a package to use both the browser and module field together (see the note below).Error: Package subpath '.' is not defined by "exports" in
- occurs when resolving without conditionNames
.The options are aligned with [enhanced-resolve].
Field | Default | Description |
---|---|---|
alias | [] | A list of module alias configurations or an object which maps key to value |
aliasFields | [] | A list of alias fields in description files |
extensionAlias | {} | An object which maps extension to extension aliases |
conditionNames | [] | A list of exports field condition names |
descriptionFiles | ["package.json"] | A list of description files to read from |
enforceExtension | false | Enforce that a extension from extensions must be used |
exportsFields | ["exports"] | A list of exports fields in description files |
extensions | [".js", ".json", ".node"] | A list of extensions which should be tried for files |
fallback | [] | Same as alias , but only used if default resolving fails |
fileSystem | The file system which should be used | |
fullySpecified | false | Request passed to resolve is already fully specified and extensions or main files are not resolved for it (they are still resolved for internal requests) |
mainFields | ["main"] | A list of main fields in description files |
mainFiles | ["index"] | A list of main files in directories |
modules | ["node_modules"] | A list of directories to resolve modules from, can be absolute path or folder name |
resolveToContext | false | Resolve to a context instead of a file |
preferRelative | false | Prefer to resolve module requests as relative request and fallback to resolving as module |
preferAbsolute | false | Prefer to resolve server-relative urls as absolute paths before falling back to resolve in roots |
restrictions | [] | A list of resolve restrictions |
roots | [] | A list of root paths |
symlinks | true | Whether to resolve symlinks to their symlinked location |
Field | Default | Description |
---|---|---|
cachePredicate | function() { return true }; | A function which decides whether a request should be cached or not. An object is passed to the function with path and request properties. |
cacheWithContext | true | If unsafe cache is enabled, includes request.context in the cache key |
plugins | [] | A list of additional resolve plugins which should be applied |
resolver | undefined | A prepared Resolver to which the plugins are attached |
unsafeCache | false | Use this cache object to unsafely cache the successful requests |