| // Copyright 2019 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // Package mod provides core features related to go.mod file |
| // handling for use by Go editors and tools. |
| package mod |
| |
| import ( |
| "context" |
| |
| "golang.org/x/tools/internal/event" |
| "golang.org/x/tools/internal/lsp/debug/tag" |
| "golang.org/x/tools/internal/lsp/protocol" |
| "golang.org/x/tools/internal/lsp/source" |
| errors "golang.org/x/xerrors" |
| ) |
| |
| func Diagnostics(ctx context.Context, snapshot source.Snapshot) (map[source.VersionedFileIdentity][]*source.Diagnostic, error) { |
| ctx, done := event.Start(ctx, "mod.Diagnostics", tag.Snapshot.Of(snapshot.ID())) |
| defer done() |
| |
| reports := map[source.VersionedFileIdentity][]*source.Diagnostic{} |
| for _, uri := range snapshot.ModFiles() { |
| fh, err := snapshot.GetVersionedFile(ctx, uri) |
| if err != nil { |
| return nil, err |
| } |
| reports[fh.VersionedFileIdentity()] = []*source.Diagnostic{} |
| errors, err := ErrorsForMod(ctx, snapshot, fh) |
| if err != nil { |
| return nil, err |
| } |
| for _, e := range errors { |
| d := &source.Diagnostic{ |
| Message: e.Message, |
| Range: e.Range, |
| Source: e.Category, |
| } |
| if e.Category == "syntax" || e.Kind == source.ListError { |
| d.Severity = protocol.SeverityError |
| } else { |
| d.Severity = protocol.SeverityWarning |
| } |
| fh, err := snapshot.GetVersionedFile(ctx, e.URI) |
| if err != nil { |
| return nil, err |
| } |
| reports[fh.VersionedFileIdentity()] = append(reports[fh.VersionedFileIdentity()], d) |
| } |
| } |
| return reports, nil |
| } |
| |
| func ErrorsForMod(ctx context.Context, snapshot source.Snapshot, fh source.FileHandle) ([]*source.Error, error) { |
| pm, err := snapshot.ParseMod(ctx, fh) |
| if err != nil { |
| if pm == nil || len(pm.ParseErrors) == 0 { |
| return nil, err |
| } |
| return pm.ParseErrors, nil |
| } |
| tidied, err := snapshot.ModTidy(ctx, pm) |
| |
| if source.IsNonFatalGoModError(err) { |
| return nil, nil |
| } |
| if err != nil { |
| // Some error messages can also be displayed as diagnostics. |
| if criticalErr := (*source.CriticalError)(nil); errors.As(err, &criticalErr) { |
| return criticalErr.ErrorList, nil |
| } |
| return nil, err |
| } |
| return tidied.Errors, nil |
| } |