source

package
v0.0.32 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: May 13, 2021 License: BSD-3-Clause Imports: 80 Imported by: 0

Documentation

Overview

Package source provides core features for use by Go editors and tools.

Index

Constants

View Source 
const (
	BREAK       = "break"
	CASE        = "case"
	CHAN        = "chan"
	CONST       = "const"
	CONTINUE    = "continue"
	DEFAULT     = "default"
	DEFER       = "defer"
	ELSE        = "else"
	FALLTHROUGH = "fallthrough"
	FOR         = "for"
	FUNC        = "func"
	GO          = "go"
	GOTO        = "goto"
	IF          = "if"
	IMPORT      = "import"
	INTERFACE   = "interface"
	MAP         = "map"
	PACKAGE     = "package"
	RANGE       = "range"
	RETURN      = "return"
	SELECT      = "select"
	STRUCT      = "struct"
	SWITCH      = "switch"
	TYPE        = "type"
	VAR         = "var"
)
View Source 
const (
	Fuzzy = Matcher(iota)
	CaseInsensitive
	CaseSensitive
)
View Source 
const (
	SymbolFuzzy = SymbolMatcher(iota)
	SymbolCaseInsensitive
	SymbolCaseSensitive
)
View Source 
const (
	PackageQualifiedSymbols = SymbolStyle(iota)
	FullyQualifiedSymbols
	DynamicSymbols
)
View Source 
const (
	SingleLine = HoverKind(iota)
	NoDocumentation
	SynopsisDocumentation
	FullDocumentation

	// Structured is an experimental setting that returns a structured hover format.
	// This format separates the signature from the documentation, so that the client
	// can do more manipulation of these fields.
	//
	// This should only be used by clients that support this behavior.
	Structured
)
View Source 
const (
	OptionHandled = OptionState(iota)
	OptionDeprecated
	OptionUnexpected
)
View Source 
const (
	UnknownFileAction = FileAction(iota)
	Open
	Change
	Close
	Save
	Create
	Delete
	InvalidateMetadata
)
View Source 
const (
	// UnknownKind is a file type we don't know about.
	UnknownKind = FileKind(iota)

	// Go is a normal go source file.
	Go
	// Mod is a go.mod file.
	Mod
	// Sum is a go.sum file.
	Sum
)
View Source 
const (
	UnknownError = ErrorKind(iota)
	ListError
	ParseError
	TypeError
	ModTidyError
	Analysis
)
View Source 
const GoModTidy = "go mod tidy"

GoModTidy is the source for a diagnostic computed by running `go mod tidy`.

View Source 
const MaxDeepCompletions = 3

MaxDeepCompletions limits deep completion results because in most cases there are too many to be useful.

Variables

View Source 
var (
	// CommandTest runs `go test` for a specific test function.
	CommandTest = &Command{
		Name:  "test",
		Title: "Run test(s)",
	}

	// CommandGenerate runs `go generate` for a given directory.
	CommandGenerate = &Command{
		Name:  "generate",
		Title: "Run go generate",
	}

	// CommandTidy runs `go mod tidy` for a module.
	CommandTidy = &Command{
		Name:  "tidy",
		Title: "Run go mod tidy",
	}

	// CommandVendor runs `go mod vendor` for a module.
	CommandVendor = &Command{
		Name:  "vendor",
		Title: "Run go mod vendor",
	}

	// CommandUpgradeDependency upgrades a dependency.
	CommandUpgradeDependency = &Command{
		Name:  "upgrade_dependency",
		Title: "Upgrade dependency",
	}

	// CommandRegenerateCgo regenerates cgo definitions.
	CommandRegenerateCgo = &Command{
		Name:  "regenerate_cgo",
		Title: "Regenerate cgo",
	}

	// CommandToggleDetails controls calculation of gc annotations.
	CommandToggleDetails = &Command{
		Name:  "gc_details",
		Title: "Toggle gc_details",
	}

	// CommandFillStruct is a gopls command to fill a struct with default
	// values.
	CommandFillStruct = &Command{
		Name:           "fill_struct",
		suggestedFixFn: fillstruct.SuggestedFix,
	}

	// CommandUndeclaredName adds a variable declaration for an undeclared
	// name.
	CommandUndeclaredName = &Command{
		Name:           "undeclared_name",
		suggestedFixFn: undeclaredname.SuggestedFix,
	}

	// CommandExtractVariable extracts an expression to a variable.
	CommandExtractVariable = &Command{
		Name:           "extract_variable",
		Title:          "Extract to variable",
		suggestedFixFn: extractVariable,
		appliesFn: func(_ *token.FileSet, rng span.Range, _ []byte, file *ast.File, _ *types.Package, _ *types.Info) bool {
			_, _, ok, _ := canExtractVariable(rng, file)
			return ok
		},
	}

	// CommandExtractFunction extracts statements to a function.
	CommandExtractFunction = &Command{
		Name:           "extract_function",
		Title:          "Extract to function",
		suggestedFixFn: extractFunction,
		appliesFn: func(fset *token.FileSet, rng span.Range, src []byte, file *ast.File, _ *types.Package, info *types.Info) bool {
			_, _, _, _, _, ok, _ := canExtractFunction(fset, rng, src, file, info)
			return ok
		},
	}
)
View Source 
var (
	InconsistentVendoring = errors.New("inconsistent vendoring")
	PackagesLoadError     = errors.New("packages.Load error")
)
View Source 
var Commands = []*Command{
	CommandGenerate,
	CommandFillStruct,
	CommandRegenerateCgo,
	CommandTest,
	CommandTidy,
	CommandUndeclaredName,
	CommandUpgradeDependency,
	CommandVendor,
	CommandExtractVariable,
	CommandExtractFunction,
	CommandToggleDetails,
}

Commands are the commands currently supported by gopls.

View Source 
var ErrNoIdentFound = errors.New("no identifier found")

ErrNoIdentFound is error returned when no identifer is found at a particular position

View Source 
var ErrNotAType = errors.New("not a type name or method")
View Source 
var ErrTmpModfileUnsupported = errors.New("-modfile is unsupported for this Go version")

Functions

func CommentToMarkdown 

func CommentToMarkdown(text string) string

CommentToMarkdown converts comment text to formatted markdown. The comment was prepared by DocReader, so it is known not to have leading, trailing blank lines nor to have trailing spaces at the end of lines. The comment markers have already been removed.

Each line is converted into a markdown line and empty lines are just converted to newlines. Heading are prefixed with `### ` to make it a markdown heading.

A span of indented lines retains a 4 space prefix block, with the common indent prefix removed unless empty, in which case it will be converted to a newline.

URLs in the comment text are converted into links.

func CompareDiagnostic 

func CompareDiagnostic(a, b *Diagnostic) int

func Completion 

func Completion(ctx context.Context, snapshot Snapshot, fh FileHandle, protoPos protocol.Position, triggerCharacter string) ([]CompletionItem, *Selection, error)

Completion returns a list of possible candidates for completion, given a a file and a position.

The selection is computed based on the preceding identifier and can be used by the client to score the quality of the completion. For instance, some clients may tolerate imperfect matches as valid completion results, since users may make typos.

func Diagnostics 

func Diagnostics(ctx context.Context, snapshot Snapshot, pkg Package, withAnalysis bool) (map[VersionedFileIdentity][]*Diagnostic, bool, error)

func DocumentSymbols 

func DocumentSymbols(ctx context.Context, snapshot Snapshot, fh FileHandle) ([]protocol.DocumentSymbol, error)

func FileDiagnostics 

func FileDiagnostics(ctx context.Context, snapshot Snapshot, uri span.URI) (VersionedFileIdentity, []*Diagnostic, error)

func Format 

func Format(ctx context.Context, snapshot Snapshot, fh FileHandle) ([]protocol.TextEdit, error)

Format formats a file with a given range.

func FormatHover 

func FormatHover(h *HoverInformation, options Options) (string, error)

func FromProtocolEdits 

func FromProtocolEdits(m *protocol.ColumnMapper, edits []protocol.TextEdit) ([]diff.TextEdit, error)

func GCOptimizationDetails 

func GCOptimizationDetails(ctx context.Context, snapshot Snapshot, pkgDir span.URI) (map[VersionedFileIdentity][]*Diagnostic, error)

func Highlight 

func Highlight(ctx context.Context, snapshot Snapshot, fh FileHandle, pos protocol.Position) ([]protocol.Range, error)

func Hover 

func Hover(ctx context.Context, snapshot Snapshot, fh FileHandle, position protocol.Position) (*protocol.Hover, error)

func Implementation 

func Implementation(ctx context.Context, snapshot Snapshot, f FileHandle, pp protocol.Position) ([]protocol.Location, error)

func IncomingCalls 

func IncomingCalls(ctx context.Context, snapshot Snapshot, fh FileHandle, pos protocol.Position) ([]protocol.CallHierarchyIncomingCall, error)

IncomingCalls returns an array of CallHierarchyIncomingCall for a file and the position within the file.

func IsGenerated 

func IsGenerated(ctx context.Context, snapshot Snapshot, uri span.URI) bool

func LensFuncs 

func LensFuncs() map[string]LensFunc

LensFuncs returns the supported lensFuncs for Go files.

func MarshalArgs 

func MarshalArgs(args ...interface{}) ([]json.RawMessage, error)

MarshalArgs encodes the given arguments to json.RawMessages. This function is used to construct arguments to a protocol.Command.

Example usage: 

jsonArgs, err := EncodeArgs(1, "hello", true, StructuredArg{42, 12.6})

func OutgoingCalls 

func OutgoingCalls(ctx context.Context, snapshot Snapshot, fh FileHandle, pos protocol.Position) ([]protocol.CallHierarchyOutgoingCall, error)

OutgoingCalls returns an array of CallHierarchyOutgoingCall for a file and the position within the file.

func PrepareCallHierarchy 

func PrepareCallHierarchy(ctx context.Context, snapshot Snapshot, fh FileHandle, pos protocol.Position) ([]protocol.CallHierarchyItem, error)

PrepareCallHierarchy returns an array of CallHierarchyItem for a file and the position within the file.

func Rename 

func Rename(ctx context.Context, s Snapshot, f FileHandle, pp protocol.Position, newName string) (map[span.URI][]protocol.TextEdit, error)

Rename returns a map of TextEdits for each file modified when renaming a given identifier within a package.

func SignatureHelp 

func SignatureHelp(ctx context.Context, snapshot Snapshot, fh FileHandle, pos protocol.Position) (*protocol.SignatureInformation, int, error)

func SortDiagnostics 

func SortDiagnostics(d []*Diagnostic)

func ToProtocolEdits 

func ToProtocolEdits(m *protocol.ColumnMapper, edits []diff.TextEdit) ([]protocol.TextEdit, error)

func UnmarshalArgs 

func UnmarshalArgs(jsonArgs []json.RawMessage, args ...interface{}) error

UnmarshalArgs decodes the given json.RawMessages to the variables provided by args. Each element of args should be a pointer.

Example usage: 

var (
    num int
    str string
    bul bool
    structured StructuredArg
)
err := UnmarshalArgs(args, &num, &str, &bul, &structured)

func WorkspaceSymbols 

func WorkspaceSymbols(ctx context.Context, matcherType SymbolMatcher, style SymbolStyle, views []View, query string) ([]protocol.SymbolInformation, error)

WorkspaceSymbols matches symbols across views using the given query, according to the SymbolMatcher matcher.

The workspace symbol method is defined in the spec as follows: 

> The workspace symbol request is sent from the client to the server to
> list project-wide symbols matching the query string.

It is unclear what "project-wide" means here, but given the parameters of workspace/symbol do not include any workspace identifier, then it has to be assumed that "project-wide" means "across all workspaces". Hence why WorkspaceSymbols receives the views []View.

However, it then becomes unclear what it would mean to call WorkspaceSymbols with a different configured SymbolMatcher per View. Therefore we assume that Session level configuration will define the SymbolMatcher to be used for the WorkspaceSymbols method.

Types

type Analyzer 

type Analyzer struct {
	Analyzer *analysis.Analyzer

	// Command is the name of the command used to invoke the suggested fixes
	// for the analyzer. It is non-nil if we expect this analyzer to provide
	// its fix separately from its diagnostics. That is, we should apply the
	// analyzer's suggested fixes through a Command, not a TextEdit.
	Command *Command

	// If this is true, then we can apply the suggested fixes
	// as part of a source.FixAll codeaction.
	HighConfidence bool

	// FixesError is only set for type-error analyzers.
	// It reports true if the message provided indicates an error that could be
	// fixed by the analyzer.
	FixesError func(msg string) bool
	// contains filtered or unexported fields
}

Analyzer represents a go/analysis analyzer with some boolean properties that let the user know how to use the analyzer.

func EnabledAnalyzers 

func EnabledAnalyzers(snapshot Snapshot) (analyzers []Analyzer)

EnabledAnalyzers returns all of the analyzers enabled for the given snapshot.

func (Analyzer) Enabled 

func (a Analyzer) Enabled(view View) bool

type AppliesFunc 

type AppliesFunc func(fset *token.FileSet, rng span.Range, src []byte, file *ast.File, pkg *types.Package, info *types.Info) bool

type BuiltinPackage 

type BuiltinPackage struct {
	Package    *ast.Package
	ParsedFile *ParsedGoFile
}

type ClientOptions 

type ClientOptions struct {
	InsertTextFormat                  protocol.InsertTextFormat
	ConfigurationSupported            bool
	DynamicConfigurationSupported     bool
	DynamicWatchedFilesSupported      bool
	PreferredContentFormat            protocol.MarkupKind
	LineFoldingOnly                   bool
	HierarchicalDocumentSymbolSupport bool
}

ClientOptions holds LSP-specific configuration that is provided by the client.

type Command 

type Command struct {
	Name, Title string
	// contains filtered or unexported fields
}

func (*Command) Applies 

func (c *Command) Applies(ctx context.Context, snapshot Snapshot, fh FileHandle, pRng protocol.Range) bool

Applies reports whether the command c implements a suggested fix that is relevant to the given rng.

func (*Command) IsSuggestedFix 

func (c *Command) IsSuggestedFix() bool

IsSuggestedFix reports whether the given command is intended to work as a suggested fix. Suggested fix commands are intended to return edits which are then applied to the workspace.

func (*Command) SuggestedFix 

func (c *Command) SuggestedFix(ctx context.Context, snapshot Snapshot, fh VersionedFileHandle, pRng protocol.Range) ([]protocol.TextDocumentEdit, error)

SuggestedFix applies the command's suggested fix to the given file and range, returning the resulting edits.

type CompletionItem 

type CompletionItem struct {
	// Label is the primary text the user sees for this completion item.
	Label string

	// Detail is supplemental information to present to the user.
	// This often contains the type or return type of the completion item.
	Detail string

	// InsertText is the text to insert if this item is selected.
	// Any of the prefix that has already been typed is not trimmed.
	// The insert text does not contain snippets.
	InsertText string

	Kind protocol.CompletionItemKind

	// An optional array of additional TextEdits that are applied when
	// selecting this completion.
	//
	// Additional text edits should be used to change text unrelated to the current cursor position
	// (for example adding an import statement at the top of the file if the completion item will
	// insert an unqualified type).
	AdditionalTextEdits []protocol.TextEdit

	// Depth is how many levels were searched to find this completion.
	// For example when completing "foo<>", "fooBar" is depth 0, and
	// "fooBar.Baz" is depth 1.
	Depth int

	// Score is the internal relevance score.
	// A higher score indicates that this completion item is more relevant.
	Score float64

	// Documentation is the documentation for the completion item.
	Documentation string
	// contains filtered or unexported fields
}

func (*CompletionItem) Snippet 

func (i *CompletionItem) Snippet() string

Snippet is a convenience returns the snippet if available, otherwise the InsertText. used for an item, depending on if the callee wants placeholders or not.

type DebuggingOptions 

type DebuggingOptions struct {
	VerboseOutput bool

	// CompletionBudget is the soft latency goal for completion requests. Most
	// requests finish in a couple milliseconds, but in some cases deep
	// completions can take much longer. As we use up our budget we
	// dynamically reduce the search scope to ensure we return timely
	// results. Zero means unlimited.
	CompletionBudget time.Duration

	// LiteralCompletions controls whether literal candidates such as
	// "&someStruct{}" are offered. Tests disable this flag to simplify
	// their expected values.
	LiteralCompletions bool
}

DebuggingOptions should not affect the logical execution of Gopls, but may be altered for debugging purposes.

type Declaration 

type Declaration struct {
	MappedRange []mappedRange
	// contains filtered or unexported fields
}

type Diagnostic 

type Diagnostic struct {
	Range    protocol.Range
	Message  string
	Source   string
	Severity protocol.DiagnosticSeverity
	Tags     []protocol.DiagnosticTag

	Related []RelatedInformation
}

type ErrIsDefinition 

type ErrIsDefinition struct {
	// contains filtered or unexported fields
}

ErrIsDefinition is an error that informs the user they got no completions because they tried to complete the name of a new object being defined.

func (ErrIsDefinition) Error 

func (e ErrIsDefinition) Error() string

type Error 

type Error struct {
	URI            span.URI
	Range          protocol.Range
	Kind           ErrorKind
	Message        string
	Category       string // only used by analysis errors so far
	SuggestedFixes []SuggestedFix
	Related        []RelatedInformation
}

func (*Error) Error 

func (e *Error) Error() string

type ErrorKind 

type ErrorKind int

type ExperimentalOptions 

type ExperimentalOptions struct {
	// TempModfile controls the use of the -modfile flag in Go 1.14.
	TempModfile bool

	// VerboseWorkDoneProgress controls whether the LSP server should send
	// progress reports for all work done outside the scope of an RPC.
	VerboseWorkDoneProgress bool

	// Annotations suppress various kinds of optimization diagnostics
	// that would be reported by the gc_details command.
	//   noNilcheck suppresses display of nilchecks.
	//   noEscape suppresses escape choices.
	//   noInline suppresses inlining choices.
	//   noBounds suppresses bounds checking diagnositcs.
	Annotations map[string]bool
}

ExperimentalOptions defines configuration for features under active development. WARNING: This configuration will be changed in the future. It only exists while these features are under development.

type FileAction 

type FileAction int

func (FileAction) String 

func (a FileAction) String() string

type FileHandle 

type FileHandle interface {
	URI() span.URI
	Kind() FileKind

	// Identity returns a FileIdentity for the file, even if there was an error
	// reading it.
	// It is a fatal error to call Identity on a file that has not yet been read.
	FileIdentity() FileIdentity
	// Read reads the contents of a file.
	// If the file is not available, returns a nil slice and an error.
	Read() ([]byte, error)
}

FileHandle represents a handle to a specific version of a single file.

type FileIdentity 

type FileIdentity struct {
	URI span.URI

	// Identifier represents a unique identifier for the file's content.
	Hash string

	// Kind is the file's kind.
	Kind FileKind
}

FileIdentity uniquely identifies a file at a version from a FileSystem.

type FileKind 

type FileKind int

FileKind describes the kind of the file in question. It can be one of Go, mod, or sum.

func DetectLanguage 

func DetectLanguage(langID, filename string) FileKind

func (FileKind) String 

func (k FileKind) String() string

type FileModification 

type FileModification struct {
	URI    span.URI
	Action FileAction

	// OnDisk is true if a watched file is changed on disk.
	// If true, Version will be -1 and Text will be nil.
	OnDisk bool

	// Version will be -1 and Text will be nil when they are not supplied,
	// specifically on textDocument/didClose and for on-disk changes.
	Version float64
	Text    []byte

	// LanguageID is only sent from the language client on textDocument/didOpen.
	LanguageID string
}

FileModification represents a modification to a file.

type FoldingRangeInfo 

type FoldingRangeInfo struct {
	Kind protocol.FoldingRangeKind
	// contains filtered or unexported fields
}

FoldingRangeInfo holds range and kind info of folding for an ast.Node

func FoldingRange 

func FoldingRange(ctx context.Context, snapshot Snapshot, fh FileHandle, lineFoldingOnly bool) (ranges []*FoldingRangeInfo, err error)

FoldingRange gets all of the folding range for f.

func (FoldingRangeInfo) Range 

func (s FoldingRangeInfo) Range() (protocol.Range, error)

func (FoldingRangeInfo) Span 

func (s FoldingRangeInfo) Span() (span.Span, error)

func (FoldingRangeInfo) URI 

func (s FoldingRangeInfo) URI() span.URI

type Hooks 

type Hooks struct {
	GoDiff               bool
	ComputeEdits         diff.ComputeEdits
	URLRegexp            *regexp.Regexp
	DefaultAnalyzers     map[string]Analyzer
	TypeErrorAnalyzers   map[string]Analyzer
	ConvenienceAnalyzers map[string]Analyzer
	GofumptFormat        func(ctx context.Context, src []byte) ([]byte, error)
}

Hooks contains configuration that is provided to the Gopls command by the main package.

type HoverInformation 

type HoverInformation struct {
	// Signature is the symbol's signature.
	Signature string `json:"signature"`

	// SingleLine is a single line describing the symbol.
	// This is recommended only for use in clients that show a single line for hover.
	SingleLine string `json:"singleLine"`

	// Synopsis is a single sentence synopsis of the symbol's documentation.
	Synopsis string `json:"synopsis"`

	// FullDocumentation is the symbol's full documentation.
	FullDocumentation string `json:"fullDocumentation"`

	// ImportPath is the import path for the package containing the given symbol.
	ImportPath string

	// Link is the pkg.go.dev anchor for the given symbol.
	// For example, "go/ast#Node".
	Link string `json:"link"`

	// SymbolName is the types.Object.Name for the given symbol.
	SymbolName string
	// contains filtered or unexported fields
}

func HoverIdentifier 

func HoverIdentifier(ctx context.Context, i *IdentifierInfo) (*HoverInformation, error)

type HoverKind 

type HoverKind int

type IdentifierInfo 

type IdentifierInfo struct {
	Name     string
	Snapshot Snapshot

	Type struct {
		Object types.Object
		// contains filtered or unexported fields
	}

	Declaration Declaration
	// contains filtered or unexported fields
}

IdentifierInfo holds information about an identifier in Go source.

func Identifier 

func Identifier(ctx context.Context, snapshot Snapshot, fh FileHandle, pos protocol.Position) (*IdentifierInfo, error)

Identifier returns identifier information for a position in a file, accounting for a potentially incomplete selector.

func (IdentifierInfo) Range 

func (s IdentifierInfo) Range() (protocol.Range, error)

func (IdentifierInfo) Span 

func (s IdentifierInfo) Span() (span.Span, error)

func (IdentifierInfo) URI 

func (s IdentifierInfo) URI() span.URI

type ImportFix 

type ImportFix struct {
	Fix   *imports.ImportFix
	Edits []protocol.TextEdit
}

func AllImportsFixes 

func AllImportsFixes(ctx context.Context, snapshot Snapshot, fh FileHandle) (allFixEdits []protocol.TextEdit, editsPerFix []*ImportFix, err error)

AllImportsFixes formats f for each possible fix to the imports. In addition to returning the result of applying all edits, it returns a list of fixes that could be applied to the file, with the corresponding TextEdits that would be needed to apply that fix.

type ImportShortcut 

type ImportShortcut int
const (
	Both ImportShortcut = iota
	Link
	Definition
)

func (ImportShortcut) ShowDefinition 

func (s ImportShortcut) ShowDefinition() bool
func (s ImportShortcut) ShowLinks() bool

type LensFunc 

type LensFunc func(context.Context, Snapshot, FileHandle) ([]protocol.CodeLens, error)

type LinkTarget 

type LinkTarget string

type Matcher 

type Matcher int

type OptionResult 

type OptionResult struct {
	Name  string
	Value interface{}
	Error error

	State       OptionState
	Replacement string
}

type OptionResults 

type OptionResults []OptionResult

func SetOptions 

func SetOptions(options *Options, opts interface{}) OptionResults

type OptionState 

type OptionState int

type Options 

type Options struct {
	ClientOptions
	ServerOptions
	UserOptions
	DebuggingOptions
	ExperimentalOptions
	Hooks
}

Options holds various configuration that affects Gopls execution, organized by the nature or origin of the settings.

func DefaultOptions 

func DefaultOptions() Options

DefaultOptions is the options that are used for Gopls execution independent of any externally provided configuration (LSP initialization, command invokation, etc.).

func (Options) AddDefaultAnalyzer 

func (o Options) AddDefaultAnalyzer(a *analysis.Analyzer)

func (*Options) ForClientCapabilities 

func (o *Options) ForClientCapabilities(caps protocol.ClientCapabilities)

type Overlay 

type Overlay interface {
	VersionedFileHandle

	// Saved returns whether this overlay has been saved to disk.
	Saved() bool
}

Overlay is the type for a file held in memory on a session.

type Package 

type Package interface {
	ID() string
	Name() string
	PkgPath() string
	CompiledGoFiles() []*ParsedGoFile
	File(uri span.URI) (*ParsedGoFile, error)
	GetSyntax() []*ast.File
	GetErrors() []*Error
	GetTypes() *types.Package
	GetTypesInfo() *types.Info
	GetTypesSizes() types.Sizes
	IsIllTyped() bool
	ForTest() string
	GetImport(pkgPath string) (Package, error)
	MissingDependencies() []string
	Imports() []Package
	Module() *packages.Module
}

Package represents a Go package that has been type-checked. It maintains only the relevant fields of a *go/packages.Package.

func NarrowestPackage 

func NarrowestPackage(pkgs []Package) (Package, error)

NarrowestPackage picks the "narrowest" package for a given file.

By "narrowest" package, we mean the package with the fewest number of files that includes the given file. This solves the problem of test variants, as the test will have more files than the non-test package.

func WidestPackage 

func WidestPackage(pkgs []Package) (Package, error)

WidestPackage returns the Package containing the most files.

This is useful for something like diagnostics, where we'd prefer to offer diagnostics for as many files as possible.

type PackagePolicy 

type PackagePolicy func([]Package) (Package, error)

type ParseMode 

type ParseMode int

ParseMode controls the content of the AST produced when parsing a source file. 

const (
	// ParseHeader specifies that the main package declaration and imports are needed.
	// This is the mode used when attempting to examine the package graph structure.
	ParseHeader ParseMode = iota

	// ParseExported specifies that the public symbols are needed, but things like
	// private symbols and function bodies are not.
	// This mode is used for things where a package is being consumed only as a
	// dependency.
	ParseExported

	// ParseFull specifies the full AST is needed.
	// This is used for files of direct interest where the entire contents must
	// be considered.
	ParseFull
)

type ParsedGoFile 

type ParsedGoFile struct {
	URI  span.URI
	Mode ParseMode
	File *ast.File
	Tok  *token.File
	// Source code used to build the AST. It may be different from the
	// actual content of the file if we have fixed the AST.
	Src      []byte
	Mapper   *protocol.ColumnMapper
	ParseErr error
}

A ParsedGoFile contains the results of parsing a Go file.

type ParsedModule 

type ParsedModule struct {
	File        *modfile.File
	Mapper      *protocol.ColumnMapper
	ParseErrors []Error
}

A ParsedModule contains the results of parsing a go.mod file.

type PrepareItem 

type PrepareItem struct {
	Range protocol.Range
	Text  string
}

func PrepareRename 

func PrepareRename(ctx context.Context, snapshot Snapshot, f FileHandle, pp protocol.Position) (*PrepareItem, error)

type ReferenceInfo 

type ReferenceInfo struct {
	Name string
	// contains filtered or unexported fields
}

ReferenceInfo holds information about reference to an identifier in Go source.

func References 

func References(ctx context.Context, s Snapshot, f FileHandle, pp protocol.Position, includeDeclaration bool) ([]*ReferenceInfo, error)

References returns a list of references for a given identifier within the packages containing i.File. Declarations appear first in the result.

func (ReferenceInfo) Range 

func (s ReferenceInfo) Range() (protocol.Range, error)

func (ReferenceInfo) Span 

func (s ReferenceInfo) Span() (span.Span, error)

func (ReferenceInfo) URI 

func (s ReferenceInfo) URI() span.URI

type RelatedInformation 

type RelatedInformation struct {
	URI     span.URI
	Range   protocol.Range
	Message string
}

type Selection 

type Selection struct {
	// contains filtered or unexported fields
}

A Selection represents the cursor position and surrounding identifier.

func (Selection) Content 

func (p Selection) Content() string

func (Selection) End 

func (p Selection) End() token.Pos

func (Selection) Prefix 

func (p Selection) Prefix() string

func (Selection) Range 

func (s Selection) Range() (protocol.Range, error)

func (Selection) Span 

func (s Selection) Span() (span.Span, error)

func (Selection) Start 

func (p Selection) Start() token.Pos

func (Selection) Suffix 

func (p Selection) Suffix() string

func (Selection) URI 

func (s Selection) URI() span.URI

type ServerOptions 

type ServerOptions struct {
	SupportedCodeActions map[FileKind]map[protocol.CodeActionKind]bool
	SupportedCommands    []string
}

ServerOptions holds LSP-specific configuration that is provided by the server.

type Session 

type Session interface {
	// NewView creates a new View, returning it and its first snapshot.
	NewView(ctx context.Context, name string, folder span.URI, options Options) (View, Snapshot, func(), error)

	// Cache returns the cache that created this session, for debugging only.
	Cache() interface{}

	// View returns a view with a matching name, if the session has one.
	View(name string) View

	// ViewOf returns a view corresponding to the given URI.
	ViewOf(uri span.URI) (View, error)

	// Views returns the set of active views built by this session.
	Views() []View

	// Shutdown the session and all views it has created.
	Shutdown(ctx context.Context)

	// GetFile returns a handle for the specified file.
	GetFile(ctx context.Context, uri span.URI) (FileHandle, error)

	// DidModifyFile reports a file modification to the session. It returns the
	// resulting snapshots, a guaranteed one per view.
	DidModifyFiles(ctx context.Context, changes []FileModification) ([]Snapshot, []func(), []span.URI, error)

	// Overlays returns a slice of file overlays for the session.
	Overlays() []Overlay

	// Options returns a copy of the SessionOptions for this session.
	Options() Options

	// SetOptions sets the options of this session to new values.
	SetOptions(Options)
}

Session represents a single connection from a client. This is the level at which things like open files are maintained on behalf of the client. A session may have many active views at any given time.

type Snapshot 

type Snapshot interface {
	ID() uint64

	// View returns the View associated with this snapshot.
	View() View

	// Fileset returns the Fileset used to parse all the Go files in this snapshot.
	FileSet() *token.FileSet

	// FindFile returns the FileHandle for the given URI, if it is already
	// in the given snapshot.
	FindFile(uri span.URI) VersionedFileHandle

	// GetFile returns the FileHandle for a given URI, initializing it
	// if it is not already part of the snapshot.
	GetFile(ctx context.Context, uri span.URI) (VersionedFileHandle, error)

	// IsOpen returns whether the editor currently has a file open.
	IsOpen(uri span.URI) bool

	// IsSaved returns whether the contents are saved on disk or not.
	IsSaved(uri span.URI) bool

	// ParseGo returns the parsed AST for the file.
	// If the file is not available, returns nil and an error.
	ParseGo(ctx context.Context, fh FileHandle, mode ParseMode) (*ParsedGoFile, error)

	// PosToField is a cache of *ast.Fields by token.Pos. This allows us
	// to quickly find corresponding *ast.Field node given a *types.Var.
	// We must refer to the AST to render type aliases properly when
	// formatting signatures and other types.
	PosToField(ctx context.Context, pgf *ParsedGoFile) (map[token.Pos]*ast.Field, error)

	// PosToDecl maps certain objects' positions to their surrounding
	// ast.Decl. This mapping is used when building the documentation
	// string for the objects.
	PosToDecl(ctx context.Context, pgf *ParsedGoFile) (map[token.Pos]ast.Decl, error)

	// Analyze runs the analyses for the given package at this snapshot.
	Analyze(ctx context.Context, pkgID string, analyzers ...*analysis.Analyzer) ([]*Error, error)

	// RunGoCommandPiped runs the given `go` command in the view, using the
	// provided stdout and stderr. It will use the -modfile flag, if possible.
	RunGoCommandPiped(ctx context.Context, verb string, args []string, stdout, stderr io.Writer) error

	// RunGoCommand runs the given `go` command in the view. It will use the
	// -modfile flag, if possible.
	RunGoCommand(ctx context.Context, verb string, args []string) (*bytes.Buffer, error)

	// RunGoCommandDirect runs the given `go` command, never using the
	// -modfile flag.
	RunGoCommandDirect(ctx context.Context, verb string, args []string) error

	// ParseMod is used to parse go.mod files.
	ParseMod(ctx context.Context, fh FileHandle) (*ParsedModule, error)

	// ModWhy returns the results of `go mod why` for the module specified by
	// the given go.mod file.
	ModWhy(ctx context.Context, fh FileHandle) (map[string]string, error)

	// ModUpgrade returns the possible updates for the module specified by the
	// given go.mod file.
	ModUpgrade(ctx context.Context, fh FileHandle) (map[string]string, error)

	// ModTidy returns the results of `go mod tidy` for the module specified by
	// the given go.mod file.
	ModTidy(ctx context.Context, fh FileHandle) (*TidiedModule, error)

	// BuiltinPackage returns information about the special builtin package.
	BuiltinPackage(ctx context.Context) (*BuiltinPackage, error)

	// PackagesForFile returns the packages that this file belongs to, checked
	// in mode.
	PackagesForFile(ctx context.Context, uri span.URI, mode TypecheckMode) ([]Package, error)

	// GetActiveReverseDeps returns the active files belonging to the reverse
	// dependencies of this file's package, checked in TypecheckWorkspace mode.
	GetReverseDependencies(ctx context.Context, id string) ([]Package, error)

	// CachedImportPaths returns all the imported packages loaded in this
	// snapshot, indexed by their import path and checked in TypecheckWorkspace
	// mode.
	CachedImportPaths(ctx context.Context) (map[string]Package, error)

	// KnownPackages returns all the packages loaded in this snapshot, checked
	// in TypecheckWorkspace mode.
	KnownPackages(ctx context.Context) ([]Package, error)

	// WorkspacePackages returns the snapshot's top-level packages.
	WorkspacePackages(ctx context.Context) ([]Package, error)

	// WorkspaceDirectories returns any directory known by the view. For views
	// within a module, this is the module root and any replace targets.
	WorkspaceDirectories(ctx context.Context) []span.URI
}

Snapshot represents the current state for the given view.

type SuggestedFix 

type SuggestedFix struct {
	Title string
	Edits map[span.URI][]protocol.TextEdit
}

type SuggestedFixFunc 

type SuggestedFixFunc func(fset *token.FileSet, rng span.Range, src []byte, file *ast.File, pkg *types.Package, info *types.Info) (*analysis.SuggestedFix, error)

SuggestedFixFunc is a function used to get the suggested fixes for a given gopls command, some of which are provided by go/analysis.Analyzers. Some of the analyzers in internal/lsp/analysis are not efficient enough to include suggested fixes with their diagnostics, so we have to compute them separately. Such analyzers should provide a function with a signature of SuggestedFixFunc.

type SymbolMatcher 

type SymbolMatcher int

type SymbolStyle 

type SymbolStyle int

type TidiedModule 

type TidiedModule struct {
	// The parsed module, which is guaranteed to have parsed successfully.
	Parsed *ParsedModule
	// Diagnostics representing changes made by `go mod tidy`.
	Errors []Error
	// The bytes of the go.mod file after it was tidied.
	TidiedContent []byte
}

A TidiedModule contains the results of running `go mod tidy` on a module.

type TypecheckMode 

type TypecheckMode int

TypecheckMode controls what kind of parsing should be done (see ParseMode) while type checking a package. 

const (
	// Invalid default value.
	TypecheckUnknown TypecheckMode = iota
	// TypecheckFull means to use ParseFull.
	TypecheckFull
	// TypecheckWorkspace means to use ParseFull for workspace packages, and
	// ParseExported for others.
	TypecheckWorkspace
	// TypecheckAll means ParseFull for workspace packages, and both Full and
	// Exported for others. Only valid for some functions.
	TypecheckAll
)

type UserOptions 

type UserOptions struct {
	// Env is the current set of environment overrides on this view.
	Env []string

	// BuildFlags is used to adjust the build flags applied to the view.
	BuildFlags []string

	// HoverKind specifies the format of the content for hover requests.
	HoverKind HoverKind

	// UserEnabledAnalyses specifies analyses that the user would like to enable
	// or disable. A map of the names of analysis passes that should be
	// enabled/disabled. A full list of analyzers that gopls uses can be found
	// [here](analyzers.md).
	//
	// Example Usage:
	// ...
	// "analyses": {
	//   "unreachable": false, // Disable the unreachable analyzer.
	//   "unusedparams": true  // Enable the unusedparams analyzer.
	// }
	UserEnabledAnalyses map[string]bool

	// EnabledCodeLens specifies which codelens are enabled, keyed by the gopls
	// command that they provide.
	EnabledCodeLens map[string]bool

	// StaticCheck enables additional analyses from staticcheck.io.
	StaticCheck bool

	// LinkTarget is the website used for documentation. If empty, no link is
	// provided.
	LinkTarget string

	// LinksInHover toggles the presence of links to documentation in hover.
	LinksInHover bool

	// ImportShortcut specifies whether import statements should link to
	// documentation or go to definitions. The default is both.
	ImportShortcut ImportShortcut

	// LocalPrefix is used to specify goimports's -local behavior.
	LocalPrefix string

	// Matcher specifies the type of matcher to use for completion requests.
	Matcher Matcher

	// SymbolMatcher specifies the type of matcher to use for symbol requests.
	SymbolMatcher SymbolMatcher

	// SymbolStyle specifies what style of symbols to return in symbol requests
	// (package qualified, fully qualified, etc).
	SymbolStyle SymbolStyle

	// DeepCompletion allows completion to perform nested searches through
	// possible candidates.
	DeepCompletion bool

	// UnimportedCompletion enables completion for unimported packages.
	UnimportedCompletion bool

	// CompletionDocumentation returns additional documentation with completion
	// requests.
	CompletionDocumentation bool

	// Placeholders adds placeholders to parameters and structs in completion
	// results.
	Placeholders bool

	// Gofumpt indicates if we should run gofumpt formatting.
	Gofumpt bool

	// ExpandWorkspaceToModule is true if we should expand the scope of the
	// workspace to include the modules containing the workspace folders.
	ExpandWorkspaceToModule bool
}

UserOptions holds custom Gopls configuration (not part of the LSP) that is modified by the client.

type VersionedFileHandle 

type VersionedFileHandle interface {
	FileHandle
	Version() float64
	Session() string

	// LSPIdentity returns the version identity of a file.
	VersionedFileIdentity() VersionedFileIdentity
}

type VersionedFileIdentity 

type VersionedFileIdentity struct {
	URI span.URI

	// SessionID is the ID of the LSP session.
	SessionID string

	// Version is the version of the file, as specified by the client. It should
	// only be set in combination with SessionID.
	Version float64
}

type View 

type View interface {
	// Session returns the session that created this view.
	Session() Session

	// Name returns the name this view was constructed with.
	Name() string

	// Folder returns the root folder for this view.
	Folder() span.URI

	// ModFile is the go.mod file at the root of this view. It may not exist.
	ModFile() span.URI

	// BackgroundContext returns a context used for all background processing
	// on behalf of this view.
	BackgroundContext() context.Context

	// Shutdown closes this view, and detaches it from its session.
	Shutdown(ctx context.Context)

	// AwaitInitialized waits until a view is initialized
	AwaitInitialized(ctx context.Context)

	// WriteEnv writes the view-specific environment to the io.Writer.
	WriteEnv(ctx context.Context, w io.Writer) error

	// RunProcessEnvFunc runs fn with the process env for this snapshot's view.
	// Note: the process env contains cached module and filesystem state.
	RunProcessEnvFunc(ctx context.Context, fn func(*imports.Options) error) error

	// Options returns a copy of the Options for this view.
	Options() Options

	// SetOptions sets the options of this view to new values.
	// Calling this may cause the view to be invalidated and a replacement view
	// added to the session. If so the new view will be returned, otherwise the
	// original one will be.
	SetOptions(context.Context, Options) (View, error)

	// Snapshot returns the current snapshot for the view.
	Snapshot(ctx context.Context) (Snapshot, func())

	// Rebuild rebuilds the current view, replacing the original view in its session.
	Rebuild(ctx context.Context) (Snapshot, func(), error)

	// InvalidBuildConfiguration returns true if there is some error in the
	// user's workspace. In particular, if they are both outside of a module
	// and their GOPATH.
	ValidBuildConfiguration() bool

	// IsGoPrivatePath reports whether target is a private import path, as identified
	// by the GOPRIVATE environment variable.
	IsGoPrivatePath(path string) bool

	// IgnoredFile reports if a file would be ignored by a `go list` of the whole
	// workspace.
	IgnoredFile(uri span.URI) bool
}

View represents a single workspace. This is the level at which we maintain configuration like working directory and build tags.

Source Files

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