mirror of
https://github.com/golang/go
synced 2024-11-19 00:44:40 -07:00
3576414c54
This change separates a cache package out of the golang.org/x/tools/internal/lsp/source package. The source package now uses an interface instead a File struct, which will allow it be reused more easily. The cache package contains the View and File structs now. Change-Id: Ia2114e9dafc5214c8b21bceba3adae1c36b9799d Reviewed-on: https://go-review.googlesource.com/c/152798 Reviewed-by: Ian Cottrell <iancottrell@google.com>
95 lines
2.3 KiB
Go
95 lines
2.3 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
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import (
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"context"
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"go/token"
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"strconv"
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"strings"
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"golang.org/x/tools/go/packages"
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)
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type Diagnostic struct {
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token.Position
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Message string
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}
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func Diagnostics(ctx context.Context, f File) (map[string][]Diagnostic, error) {
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pkg, err := f.GetPackage()
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if err != nil {
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return nil, err
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}
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// Prepare the reports we will send for this package.
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reports := make(map[string][]Diagnostic)
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for _, filename := range pkg.GoFiles {
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reports[filename] = []Diagnostic{}
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}
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var parseErrors, typeErrors []packages.Error
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for _, err := range pkg.Errors {
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switch err.Kind {
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case packages.ParseError:
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parseErrors = append(parseErrors, err)
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case packages.TypeError:
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typeErrors = append(typeErrors, err)
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default:
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// ignore other types of errors
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continue
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}
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}
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// Don't report type errors if there are parse errors.
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diags := typeErrors
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if len(parseErrors) > 0 {
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diags = parseErrors
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}
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for _, diag := range diags {
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pos := errorPos(diag)
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diagnostic := Diagnostic{
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Position: pos,
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Message: diag.Msg,
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}
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if _, ok := reports[pos.Filename]; ok {
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reports[pos.Filename] = append(reports[pos.Filename], diagnostic)
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}
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}
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return reports, nil
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}
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// FromTokenPosition converts a token.Position (1-based line and column
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// number) to a token.Pos (byte offset value).
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// It requires the token file the pos belongs to in order to do this.
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func FromTokenPosition(f *token.File, pos token.Position) token.Pos {
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line := lineStart(f, pos.Line)
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return line + token.Pos(pos.Column-1) // TODO: this is wrong, bytes not characters
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}
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func errorPos(pkgErr packages.Error) token.Position {
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remainder1, first, hasLine := chop(pkgErr.Pos)
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remainder2, second, hasColumn := chop(remainder1)
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var pos token.Position
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if hasLine && hasColumn {
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pos.Filename = remainder2
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pos.Line = second
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pos.Column = first
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} else if hasLine {
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pos.Filename = remainder1
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pos.Line = first
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}
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return pos
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}
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func chop(text string) (remainder string, value int, ok bool) {
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i := strings.LastIndex(text, ":")
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if i < 0 {
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return text, 0, false
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}
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v, err := strconv.ParseInt(text[i+1:], 10, 64)
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if err != nil {
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return text, 0, false
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}
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return text[:i], int(v), true
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}
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