1 files changed, 34 insertions, 0 deletions
diff --git a/libgo/go/cmd/go/internal/imports/tags.go b/libgo/go/cmd/go/internal/imports/tags.go
new file mode 100644
index 00000000000..1c22a472b80
--- /dev/null
+++ b/libgo/go/cmd/go/internal/imports/tags.go
@@ -0,0 +1,34 @@
+// Copyright 2018 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 imports
+
+import "cmd/go/internal/cfg"
+
+var tags map[string]bool
+
+func Tags() map[string]bool {
+	if tags == nil {
+		tags = loadTags()
+	}
+	return tags
+}
+
+func loadTags() map[string]bool {
+	tags := map[string]bool{
+		cfg.BuildContext.GOOS:     true,
+		cfg.BuildContext.GOARCH:   true,
+		cfg.BuildContext.Compiler: true,
+	}
+	if cfg.BuildContext.CgoEnabled {
+		tags["cgo"] = true
+	}
+	for _, tag := range cfg.BuildContext.BuildTags {
+		tags[tag] = true
+	}
+	for _, tag := range cfg.BuildContext.ReleaseTags {
+		tags[tag] = true
+	}
+	return tags
+}