move meta imports handler into a separate file

pkg/vcs/meta.go

@@ -0,0 +1,53 @@
+package vcs
+
+import (
+	"context"
+	"encoding/xml"
+	"errors"
+	"net/http"
+	"strings"
+)
+
+// MetaImports resolved module import path for certain hosts using the special <meta> tag.
+func MetaImports(ctx context.Context, module string) (string, error) {
+	if strings.HasPrefix(module, "github.com/") || strings.HasPrefix(module, "bitbucket.org/") {
+		return module, nil
+	}
+	// TODO: use context
+	res, err := http.Get("https://" + module + "?go-get=1")
+	if err != nil {
+		return "", err
+	}
+	defer res.Body.Close()
+	html := struct {
+		HTML string `xml:"html"`
+		Head struct {
+			Meta []struct {
+				Name    string `xml:"name,attr"`
+				Content string `xml:"content,attr"`
+			} `xml:"meta"`
+		} `xml:"head"`
+	}{}
+	dec := xml.NewDecoder(res.Body)
+	dec.Strict = false
+	dec.AutoClose = xml.HTMLAutoClose
+	dec.Entity = xml.HTMLEntity
+	if err := dec.Decode(&html); err != nil {
+		return "", err
+	}
+	for _, meta := range html.Head.Meta {
+		if meta.Name == "go-import" {
+			if f := strings.Fields(meta.Content); len(f) == 3 {
+				if f[0] != module {
+					return "", errors.New("prefix does not match the module")
+				}
+				url := f[2]
+				if i := strings.Index(url, "://"); i >= 0 {
+					url = url[i+3:]
+				}
+				return url, nil
+			}
+		}
+	}
+	return "", errors.New("go-import meta tag not found")
+}

pkg/vcs/vcs.go

@@ -2,10 +2,7 @@ package vcs
 
 import (
 	"context"
-	"encoding/xml"
-	"errors"
 	"io"
-	"net/http"
 	"regexp"
 	"strings"
 	"time"
@@ -60,47 +57,3 @@ func Password(username, password string) Auth { return Auth{Username: username,
 
 // Key returns an Auth implementation that uses key file authentication mechanism.
 func Key(key string) Auth { return Auth{Key: key} }
-
-// MetaImports resolved module import path for certain hosts using the special <meta> tag.
-func MetaImports(ctx context.Context, module string) (string, error) {
-	if strings.HasPrefix(module, "github.com/") || strings.HasPrefix(module, "bitbucket.org/") {
-		return module, nil
-	}
-	// TODO: use context
-	res, err := http.Get("https://" + module + "?go-get=1")
-	if err != nil {
-		return "", err
-	}
-	defer res.Body.Close()
-	html := struct {
-		HTML string `xml:"html"`
-		Head struct {
-			Meta []struct {
-				Name    string `xml:"name,attr"`
-				Content string `xml:"content,attr"`
-			} `xml:"meta"`
-		} `xml:"head"`
-	}{}
-	dec := xml.NewDecoder(res.Body)
-	dec.Strict = false
-	dec.AutoClose = xml.HTMLAutoClose
-	dec.Entity = xml.HTMLEntity
-	if err := dec.Decode(&html); err != nil {
-		return "", err
-	}
-	for _, meta := range html.Head.Meta {
-		if meta.Name == "go-import" {
-			if f := strings.Fields(meta.Content); len(f) == 3 {
-				if f[0] != module {
-					return "", errors.New("prefix does not match the module")
-				}
-				url := f[2]
-				if i := strings.Index(url, "://"); i >= 0 {
-					url = url[i+3:]
-				}
-				return url, nil
-			}
-		}
-	}
-	return "", errors.New("go-import meta tag not found")
-}