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// Copyright ©2019 The Gonum 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 gonum
import (
"fmt"
"runtime/debug"
)
const root = "gonum.org/v1/gonum"
// Version returns the version of Gonum and its checksum. The returned
// values are only valid in binaries built with module support.
//
// If a replace directive exists in the Gonum go.mod, the replace will
// be reported in the version in the following format:
//
// "version=>[replace-path] [replace-version]"
//
// and the replace sum will be returned in place of the original sum.
//
// The exact version format returned by Version may change in future.
func Version() (version, sum string) {
b, ok := debug.ReadBuildInfo()
if !ok {
return "", ""
}
for _, m := range b.Deps {
if m.Path == root {
if m.Replace != nil {
switch {
case m.Replace.Version != "" && m.Replace.Path != "":
return fmt.Sprintf("%s=>%s %s", m.Version, m.Replace.Path, m.Replace.Version), m.Replace.Sum
case m.Replace.Version != "":
return fmt.Sprintf("%s=>%s", m.Version, m.Replace.Version), m.Replace.Sum
case m.Replace.Path != "":
return fmt.Sprintf("%s=>%s", m.Version, m.Replace.Path), m.Replace.Sum
default:
return m.Version + "*", m.Sum + "*"
}
}
return m.Version, m.Sum
}
}
return "", ""
}
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