resolver

Documentation

Index

• Constants
• Variables
• func IsInsideNodeModules(fs fs.FS, path string) bool
• func IsPackagePath(path string) bool
• type IgnoreIfUnusedData
• type PathPair
  • func (pp *PathPair) HasSecondary() bool
• type ResolveResult
• type Resolver
  • func NewResolver(fs fs.FS, log logger.Log, caches *cache.CacheSet, options config.Options) Resolver
• type TSConfigJSON
  • func ParseTSConfigJSON(log logger.Log, source logger.Source, jsonCache *cache.JSONCache, ...) *TSConfigJSON

Constants

const BrowserFalseNamespace = "empty"

This namespace is used when a module has been disabled by being mapped to "false" using the "browser" field of "package.json".

Variables

var BuiltInNodeModules = map[string]bool{
	"assert":         true,
	"async_hooks":    true,
	"buffer":         true,
	"child_process":  true,
	"cluster":        true,
	"console":        true,
	"constants":      true,
	"crypto":         true,
	"dgram":          true,
	"dns":            true,
	"domain":         true,
	"events":         true,
	"fs":             true,
	"http":           true,
	"http2":          true,
	"https":          true,
	"inspector":      true,
	"module":         true,
	"net":            true,
	"os":             true,
	"path":           true,
	"perf_hooks":     true,
	"process":        true,
	"punycode":       true,
	"querystring":    true,
	"readline":       true,
	"repl":           true,
	"stream":         true,
	"string_decoder": true,
	"sys":            true,
	"timers":         true,
	"tls":            true,
	"trace_events":   true,
	"tty":            true,
	"url":            true,
	"util":           true,
	"v8":             true,
	"vm":             true,
	"worker_threads": true,
	"zlib":           true,
}

Functions

func IsInsideNodeModules

func IsInsideNodeModules(fs fs.FS, path string) bool

func IsPackagePath

func IsPackagePath(path string) bool

Package paths are loaded from a "node_modules" directory. Non-package paths are relative or absolute paths.

Types

type IgnoreIfUnusedData

type IgnoreIfUnusedData struct {
	Source *logger.Source
	Range  logger.Range

	// If true, "sideEffects" was an array. If false, "sideEffects" was false.
	IsSideEffectsArrayInJSON bool
}

type PathPair

type PathPair struct {
	// Either secondary will be empty, or primary will be "module" and secondary
	// will be "main"
	Primary   logger.Path
	Secondary logger.Path
}

Path resolution is a mess. One tricky issue is the "module" override for the "main" field in "package.json" files. Bundlers generally prefer "module" over "main" but that breaks packages that export a function in "main" for use with "require()", since resolving to "module" means an object will be returned. We attempt to handle this automatically by having import statements resolve to "module" but switch that out later for "main" if "require()" is used too.

func (*PathPair) HasSecondary

func (pp *PathPair) HasSecondary() bool

type ResolveResult

type ResolveResult struct {
	PathPair PathPair

	// If not empty, these should override the default values
	JSXFactory  []string // Default if empty: "React.createElement"
	JSXFragment []string // Default if empty: "React.Fragment"

	IsExternal bool

	// If true, any ES6 imports to this file can be considered to have no side
	// effects. This means they should be removed if unused.
	IgnorePrimaryIfUnused *IgnoreIfUnusedData

	// If true, the class field transform should use Object.defineProperty().
	UseDefineForClassFieldsTS bool

	// If true, unused imports are retained in TypeScript code. This matches the
	// behavior of the "importsNotUsedAsValues" field in "tsconfig.json" when the
	// value is not "remove".
	PreserveUnusedImportsTS bool
}

type Resolver

type Resolver interface {
	Resolve(sourceDir string, importPath string, kind ast.ImportKind) *ResolveResult
	ResolveAbs(absPath string) *ResolveResult
	PrettyPath(path logger.Path) string

	// This tries to run "Resolve" on a package path as a relative path. If
	// successful, the user just forgot a leading "./" in front of the path.
	ProbeResolvePackageAsRelative(sourceDir string, importPath string, kind ast.ImportKind) *ResolveResult
}

func NewResolver

func NewResolver(fs fs.FS, log logger.Log, caches *cache.CacheSet, options config.Options) Resolver

type TSConfigJSON

type TSConfigJSON struct {
	// The absolute path of "compilerOptions.baseUrl"
	BaseURL *string

	// This is used if "Paths" is non-nil. It's equal to "BaseURL" except if
	// "BaseURL" is missing, in which case it is as if "BaseURL" was ".". This
	// is to implement the "paths without baseUrl" feature from TypeScript 4.1.
	// More info: https://github.com/microsoft/TypeScript/issues/31869
	BaseURLForPaths string

	// The verbatim values of "compilerOptions.paths". The keys are patterns to
	// match and the values are arrays of fallback paths to search. Each key and
	// each fallback path can optionally have a single "*" wildcard character.
	// If both the key and the value have a wildcard, the substring matched by
	// the wildcard is substituted into the fallback path. The keys represent
	// module-style path names and the fallback paths are relative to the
	// "baseUrl" value in the "tsconfig.json" file.
	Paths map[string][]string

	JSXFactory                     []string
	JSXFragmentFactory             []string
	UseDefineForClassFields        bool
	PreserveImportsNotUsedAsValues bool
}

func ParseTSConfigJSON

func ParseTSConfigJSON(
	log logger.Log,
	source logger.Source,
	jsonCache *cache.JSONCache,
	extends func(string, logger.Range) *TSConfigJSON,
) *TSConfigJSON