Whoops, missed discovery.go
diff --git a/vendor/github.com/sdboyer/vsolver/discovery.go b/vendor/github.com/sdboyer/vsolver/discovery.go
new file mode 100644
index 0000000..5543bee
--- /dev/null
+++ b/vendor/github.com/sdboyer/vsolver/discovery.go
@@ -0,0 +1,83 @@
+// Copyright 2012 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 vsolver
+
+// This code is taken from cmd/go/discovery.go; it is the logic go get itself
+// uses to interpret meta imports information.
+
+import (
+ "encoding/xml"
+ "fmt"
+ "io"
+ "strings"
+)
+
+// charsetReader returns a reader for the given charset. Currently
+// it only supports UTF-8 and ASCII. Otherwise, it returns a meaningful
+// error which is printed by go get, so the user can find why the package
+// wasn't downloaded if the encoding is not supported. Note that, in
+// order to reduce potential errors, ASCII is treated as UTF-8 (i.e. characters
+// greater than 0x7f are not rejected).
+func charsetReader(charset string, input io.Reader) (io.Reader, error) {
+ switch strings.ToLower(charset) {
+ case "ascii":
+ return input, nil
+ default:
+ return nil, fmt.Errorf("can't decode XML document using charset %q", charset)
+ }
+}
+
+type metaImport struct {
+ Prefix, VCS, RepoRoot string
+}
+
+// parseMetaGoImports returns meta imports from the HTML in r.
+// Parsing ends at the end of the <head> section or the beginning of the <body>.
+func parseMetaGoImports(r io.Reader) (imports []metaImport, err error) {
+ d := xml.NewDecoder(r)
+ d.CharsetReader = charsetReader
+ d.Strict = false
+ var t xml.Token
+ for {
+ t, err = d.RawToken()
+ if err != nil {
+ if err == io.EOF || len(imports) > 0 {
+ err = nil
+ }
+ return
+ }
+ if e, ok := t.(xml.StartElement); ok && strings.EqualFold(e.Name.Local, "body") {
+ return
+ }
+ if e, ok := t.(xml.EndElement); ok && strings.EqualFold(e.Name.Local, "head") {
+ return
+ }
+ e, ok := t.(xml.StartElement)
+ if !ok || !strings.EqualFold(e.Name.Local, "meta") {
+ continue
+ }
+ if attrValue(e.Attr, "name") != "go-import" {
+ continue
+ }
+ if f := strings.Fields(attrValue(e.Attr, "content")); len(f) == 3 {
+ imports = append(imports, metaImport{
+ Prefix: f[0],
+ VCS: f[1],
+ RepoRoot: f[2],
+ })
+ }
+ }
+}
+
+// attrValue returns the attribute value for the case-insensitive key
+// `name', or the empty string if nothing is found.
+func attrValue(attrs []xml.Attr, name string) string {
+ for _, a := range attrs {
+ if strings.EqualFold(a.Name.Local, name) {
+ return a.Value
+ }
+ }
+ return ""
+}
