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author | Amine Hilaly <hilalyamine@gmail.com> | 2019-04-09 21:45:24 +0200 |
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committer | Amine Hilaly <hilalyamine@gmail.com> | 2019-04-09 21:45:24 +0200 |
commit | 26b5343e2160de172969e6834074cf8482ceb845 (patch) | |
tree | 04f27aa660a903d65f7b3d951bd1c6f92c59c0c3 /vendor/golang.org/x/tools/go/gcexportdata/importer.go | |
parent | 6e8496f4c1767ca8a8b95716a04f1b492bef7397 (diff) | |
download | git-bug-26b5343e2160de172969e6834074cf8482ceb845.tar.gz |
Update Gopkg.*
Diffstat (limited to 'vendor/golang.org/x/tools/go/gcexportdata/importer.go')
-rw-r--r-- | vendor/golang.org/x/tools/go/gcexportdata/importer.go | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/vendor/golang.org/x/tools/go/gcexportdata/importer.go b/vendor/golang.org/x/tools/go/gcexportdata/importer.go new file mode 100644 index 00000000..efe221e7 --- /dev/null +++ b/vendor/golang.org/x/tools/go/gcexportdata/importer.go @@ -0,0 +1,73 @@ +// Copyright 2016 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 gcexportdata + +import ( + "fmt" + "go/token" + "go/types" + "os" +) + +// NewImporter returns a new instance of the types.Importer interface +// that reads type information from export data files written by gc. +// The Importer also satisfies types.ImporterFrom. +// +// Export data files are located using "go build" workspace conventions +// and the build.Default context. +// +// Use this importer instead of go/importer.For("gc", ...) to avoid the +// version-skew problems described in the documentation of this package, +// or to control the FileSet or access the imports map populated during +// package loading. +// +func NewImporter(fset *token.FileSet, imports map[string]*types.Package) types.ImporterFrom { + return importer{fset, imports} +} + +type importer struct { + fset *token.FileSet + imports map[string]*types.Package +} + +func (imp importer) Import(importPath string) (*types.Package, error) { + return imp.ImportFrom(importPath, "", 0) +} + +func (imp importer) ImportFrom(importPath, srcDir string, mode types.ImportMode) (_ *types.Package, err error) { + filename, path := Find(importPath, srcDir) + if filename == "" { + if importPath == "unsafe" { + // Even for unsafe, call Find first in case + // the package was vendored. + return types.Unsafe, nil + } + return nil, fmt.Errorf("can't find import: %s", importPath) + } + + if pkg, ok := imp.imports[path]; ok && pkg.Complete() { + return pkg, nil // cache hit + } + + // open file + f, err := os.Open(filename) + if err != nil { + return nil, err + } + defer func() { + f.Close() + if err != nil { + // add file name to error + err = fmt.Errorf("reading export data: %s: %v", filename, err) + } + }() + + r, err := NewReader(f) + if err != nil { + return nil, err + } + + return Read(r, imp.fset, imp.imports, path) +} |