mirror
/
go
mirror of https://github.com/golang/go.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

internal/lsp: parse Go files through the new snapshot's cache in clone 

I think we had discussed making this change after you finished your
cache rewrites, but I never got back to it. Let me know if you think
there's a better way to do this.

Change-Id: Ia7dfe6830110f21e0d2683e64f8ee0d2549afdea
Reviewed-on: https://go-review.googlesource.com/c/tools/+/253280
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Heschi Kreinick <heschi@google.com>
This commit is contained in:
Rebecca Stambler 2020-09-05 23:38:02 -04:00
parent 27b65b427b
commit 2e7746ed96
1 changed files with 10 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
internal/lsp/cache/snapshot.go vendored
View File

@ -9,7 +9,6 @@ import (
"context"
"fmt"
"go/ast"
"go/parser"
"go/token"
"go/types"
"io"
@ -908,7 +907,7 @@ func (s *snapshot) clone(ctx context.Context, withoutURIs map[span.URI]source.Ve
// Check if the file's package name or imports have changed,
// and if so, invalidate this file's packages' metadata.
invalidateMetadata := forceReloadMetadata || s.shouldInvalidateMetadata(ctx, originalFH, currentFH)
invalidateMetadata := forceReloadMetadata || s.shouldInvalidateMetadata(ctx, result, originalFH, currentFH)
// Invalidate the previous modTidyHandle if any of the files have been
// saved or if any of the metadata has been invalidated.
@ -1088,7 +1087,7 @@ func fileWasSaved(originalFH, currentFH source.FileHandle) bool {
// shouldInvalidateMetadata reparses a file's package and import declarations to
// determine if the file requires a metadata reload.
func (s *snapshot) shouldInvalidateMetadata(ctx context.Context, originalFH, currentFH source.FileHandle) bool {
func (s *snapshot) shouldInvalidateMetadata(ctx context.Context, newSnapshot *snapshot, originalFH, currentFH source.FileHandle) bool {
if originalFH == nil {
return currentFH.Kind() == source.Go
}
@ -1100,33 +1099,26 @@ func (s *snapshot) shouldInvalidateMetadata(ctx context.Context, originalFH, cur
if kind := originalFH.Kind(); kind == source.Mod {
return originalFH.URI() == s.view.modURI
}
// Get the original and current parsed files in order to check package name and imports.
// Use the direct parsing API to avoid modifying the snapshot we're cloning.
parse := func(fh source.FileHandle) (*ast.File, error) {
data, err := fh.Read()
if err != nil {
return nil, err
}
fset := token.NewFileSet()
return parser.ParseFile(fset, fh.URI().Filename(), data, parser.ImportsOnly)
}
original, originalErr := parse(originalFH)
current, currentErr := parse(currentFH)
// Get the original and current parsed files in order to check package name
// and imports. Use the new snapshot to parse to avoid modifying the
// current snapshot.
original, originalErr := newSnapshot.ParseGo(ctx, originalFH, source.ParseHeader)
current, currentErr := newSnapshot.ParseGo(ctx, currentFH, source.ParseHeader)
if originalErr != nil || currentErr != nil {
return (originalErr == nil) != (currentErr == nil)
}
// Check if the package's metadata has changed. The cases handled are:
// 1. A package's name has changed
// 2. A file's imports have changed
if original.Name.Name != current.Name.Name {
if original.File.Name.Name != current.File.Name.Name {
return true
}
importSet := make(map[string]struct{})
for _, importSpec := range original.Imports {
for _, importSpec := range original.File.Imports {
importSet[importSpec.Path.Value] = struct{}{}
}
// If any of the current imports were not in the original imports.
for _, importSpec := range current.Imports {
for _, importSpec := range current.File.Imports {
if _, ok := importSet[importSpec.Path.Value]; ok {
continue
}