mirror of
https://github.com/golang/go
synced 2024-10-01 09:28:37 -06:00
30cae5f2fb
This change will surface errors that come from the mod package. It will handle incorrect usages, invalid directives, and other errors that occur when parsing go.mod files. Updates golang/go#31999 Change-Id: Icd817c02a4b656b2a71914ee60be4dbe2bea062d Reviewed-on: https://go-review.googlesource.com/c/tools/+/213779 Run-TryBot: Rohan Challa <rohan@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Rebecca Stambler <rstambler@golang.org>
96 lines
2.5 KiB
Go
96 lines
2.5 KiB
Go
// Copyright 2019 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 cache
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import (
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"context"
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"regexp"
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"strconv"
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"strings"
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"golang.org/x/mod/modfile"
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"golang.org/x/tools/internal/lsp/protocol"
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"golang.org/x/tools/internal/lsp/source"
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"golang.org/x/tools/internal/lsp/telemetry"
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"golang.org/x/tools/internal/memoize"
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"golang.org/x/tools/internal/telemetry/log"
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"golang.org/x/tools/internal/telemetry/trace"
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errors "golang.org/x/xerrors"
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)
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type parseModHandle struct {
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handle *memoize.Handle
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file source.FileHandle
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}
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type parseModData struct {
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memoize.NoCopy
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modfile *modfile.File
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err error
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}
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func (c *cache) ParseModHandle(fh source.FileHandle) source.ParseModHandle {
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h := c.store.Bind(fh.Identity(), func(ctx context.Context) interface{} {
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data := &parseModData{}
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data.modfile, data.err = parseMod(ctx, fh)
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return data
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})
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return &parseModHandle{
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handle: h,
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file: fh,
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}
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}
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func parseMod(ctx context.Context, fh source.FileHandle) (*modfile.File, error) {
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ctx, done := trace.StartSpan(ctx, "cache.parseMod", telemetry.File.Of(fh.Identity().URI.Filename()))
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defer done()
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buf, _, err := fh.Read(ctx)
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if err != nil {
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return nil, err
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}
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f, err := modfile.Parse(fh.Identity().URI.Filename(), buf, nil)
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if err != nil {
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// TODO(golang/go#36486): This can be removed when modfile.Parse returns structured errors.
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re := regexp.MustCompile(`.*:([\d]+): (.+)`)
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matches := re.FindStringSubmatch(strings.TrimSpace(err.Error()))
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if len(matches) < 3 {
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log.Error(ctx, "could not parse golang/x/mod error message", err)
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return nil, err
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}
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line, e := strconv.Atoi(matches[1])
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if e != nil {
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return nil, err
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}
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contents := strings.Split(string(buf), "\n")[line-1]
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return nil, &source.Error{
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Message: matches[2],
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Range: protocol.Range{
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Start: protocol.Position{Line: float64(line - 1), Character: float64(0)},
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End: protocol.Position{Line: float64(line - 1), Character: float64(len(contents))},
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},
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}
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}
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return f, nil
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}
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func (pgh *parseModHandle) String() string {
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return pgh.File().Identity().URI.Filename()
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}
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func (pgh *parseModHandle) File() source.FileHandle {
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return pgh.file
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}
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func (pgh *parseModHandle) Parse(ctx context.Context) (*modfile.File, error) {
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v := pgh.handle.Get(ctx)
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if v == nil {
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return nil, errors.Errorf("no parsed file for %s", pgh.File().Identity().URI)
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}
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data := v.(*parseModData)
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return data.modfile, data.err
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}
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