fix #38

pkg/download/download.go

@@ -19,15 +19,12 @@
 package download
 
 import (
-	"errors"
 	"fmt"
 	"io"
 	"net/http"
 	"net/url"
 )
 
-var ErrPrefix = errors.New("prefix does not match")
-
 func ApplyUrlTranformer(urlTransformer func(string) (string, error), baseURLs ...string) ([]string, error) {
 	transformedURLs := make([]string, 0, len(baseURLs))
 	for _, baseURL := range baseURLs {
@@ -70,7 +67,7 @@ func UrlTranformer(rewriteRule []string) func(string) (string, error) {
 
 	return func(urlValue string) (string, error) {
 		if len(urlValue) < prevLen || urlValue[:prevLen] != prevBaseURL {
-			return "", ErrPrefix
+			return urlValue, nil
 		}
 
 		return url.JoinPath(baseURL, urlValue[prevLen:]) //nolint

pkg/download/download_test.go

@@ -53,10 +53,14 @@ func TestUrlTransformerDisabled(t *testing.T) {
 func TestUrlTransformerPrefix(t *testing.T) {
 	urlTransformer := download.UrlTranformer([]string{"https://github.com", "https://go.dev"})
 
-	if value, err := urlTransformer("https://releases.hashicorp.com/terraform/1.7.0/terraform_1.7.0_darwin_amd64.zip"); err == nil {
-		t.Error("Should fail on erroneous prefix, get :", value)
-	} else if err != download.ErrPrefix {
-		t.Error("Incorrect error reported, get :", err)
+	initialValue := "https://releases.hashicorp.com/terraform/1.7.0/terraform_1.7.0_darwin_amd64.zip"
+	value, err := urlTransformer(initialValue)
+	if err != nil {
+		t.Fatal("Unexpected error :", err)
+	}
+
+	if value != initialValue {
+		t.Error("Unexpected result, get :", value)
 	}
 }