1 files changed, 58 insertions, 0 deletions
diff --git a/src/cmd/go/internal/modinfo/info.go b/src/cmd/go/internal/modinfo/info.go
new file mode 100644
index 0000000..897be56
--- /dev/null
+++ b/src/cmd/go/internal/modinfo/info.go
@@ -0,0 +1,58 @@
+// 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 modinfo
+
+import "time"
+
+// Note that these structs are publicly visible (part of go list's API)
+// and the fields are documented in the help text in ../list/list.go
+
+type ModulePublic struct {
+	Path      string        `json:",omitempty"` // module path
+	Version   string        `json:",omitempty"` // module version
+	Versions  []string      `json:",omitempty"` // available module versions
+	Replace   *ModulePublic `json:",omitempty"` // replaced by this module
+	Time      *time.Time    `json:",omitempty"` // time version was created
+	Update    *ModulePublic `json:",omitempty"` // available update (with -u)
+	Main      bool          `json:",omitempty"` // is this the main module?
+	Indirect  bool          `json:",omitempty"` // module is only indirectly needed by main module
+	Dir       string        `json:",omitempty"` // directory holding local copy of files, if any
+	GoMod     string        `json:",omitempty"` // path to go.mod file describing module, if any
+	GoVersion string        `json:",omitempty"` // go version used in module
+	Retracted []string      `json:",omitempty"` // retraction information, if any (with -retracted or -u)
+	Error     *ModuleError  `json:",omitempty"` // error loading module
+}
+
+type ModuleError struct {
+	Err string // error text
+}
+
+func (m *ModulePublic) String() string {
+	s := m.Path
+	versionString := func(mm *ModulePublic) string {
+		v := mm.Version
+		if len(mm.Retracted) == 0 {
+			return v
+		}
+		return v + " (retracted)"
+	}
+
+	if m.Version != "" {
+		s += " " + versionString(m)
+		if m.Update != nil {
+			s += " [" + versionString(m.Update) + "]"
+		}
+	}
+	if m.Replace != nil {
+		s += " => " + m.Replace.Path
+		if m.Replace.Version != "" {
+			s += " " + versionString(m.Replace)
+			if m.Replace.Update != nil {
+				s += " [" + versionString(m.Replace.Update) + "]"
+			}
+		}
+	}
+	return s
+}