mirror of
https://github.com/golang/go
synced 2024-11-19 01:04:40 -07:00
7927dbab1b
This moves the fileset down to the base cache, the overlays down to the session and stores the environment on the view. packages.Config is no longer part of any public API, and the config is build on demand by combining all the layers of cache. Also added some documentation to the main source pacakge interfaces. Change-Id: I058092ad2275d433864d1f58576fc55e194607a6 Reviewed-on: https://go-review.googlesource.com/c/tools/+/178017 Run-TryBot: Ian Cottrell <iancottrell@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Rebecca Stambler <rstambler@golang.org>
75 lines
2.2 KiB
Go
75 lines
2.2 KiB
Go
// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Package source provides core features for use by Go editors and tools.
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package source
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import (
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"bytes"
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"context"
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"fmt"
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"go/format"
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"golang.org/x/tools/go/ast/astutil"
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"golang.org/x/tools/go/packages"
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"golang.org/x/tools/imports"
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"golang.org/x/tools/internal/lsp/diff"
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"golang.org/x/tools/internal/span"
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)
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// Format formats a file with a given range.
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func Format(ctx context.Context, f GoFile, rng span.Range) ([]TextEdit, error) {
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file := f.GetAST(ctx)
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if file == nil {
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return nil, fmt.Errorf("no AST for %s", f.URI())
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}
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pkg := f.GetPackage(ctx)
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if hasParseErrors(pkg.GetErrors()) {
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return nil, fmt.Errorf("%s has parse errors, not formatting", f.URI())
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}
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path, exact := astutil.PathEnclosingInterval(file, rng.Start, rng.End)
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if !exact || len(path) == 0 {
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return nil, fmt.Errorf("no exact AST node matching the specified range")
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}
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node := path[0]
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// format.Node changes slightly from one release to another, so the version
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// of Go used to build the LSP server will determine how it formats code.
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// This should be acceptable for all users, who likely be prompted to rebuild
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// the LSP server on each Go release.
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fset := f.FileSet()
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buf := &bytes.Buffer{}
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if err := format.Node(buf, fset, node); err != nil {
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return nil, err
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}
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return computeTextEdits(ctx, f, buf.String()), nil
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}
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func hasParseErrors(errors []packages.Error) bool {
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for _, err := range errors {
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if err.Kind == packages.ParseError {
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return true
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}
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}
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return false
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}
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// Imports formats a file using the goimports tool.
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func Imports(ctx context.Context, f GoFile, rng span.Range) ([]TextEdit, error) {
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tok := f.GetToken(ctx)
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if tok == nil {
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return nil, fmt.Errorf("no token file for %s", f.URI())
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}
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formatted, err := imports.Process(tok.Name(), f.GetContent(ctx), nil)
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if err != nil {
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return nil, err
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}
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return computeTextEdits(ctx, f, string(formatted)), nil
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}
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func computeTextEdits(ctx context.Context, file File, formatted string) (edits []TextEdit) {
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u := diff.SplitLines(string(file.GetContent(ctx)))
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f := diff.SplitLines(formatted)
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return DiffToEdits(file.URI(), diff.Operations(u, f))
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}
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