add launchpad.net/gocheck mirror, relax spec validation

tuple/resolver.go

@@ -112,6 +112,7 @@ var resolvers = map[string]resolver{
 	"honnef.co/go/tools":          &mirror{GH, "dominikh", "go-tools", ""},
 	"howett.net/plist":            &mirror{GitlabSource("https://gitlab.howett.net"), "go", "plist", ""},
 	"k8s.io":                      mirrorFn(k8sIoResolver),
+	"launchpad.net/gocheck":       &mirror{GH, "go-check", "check", ""},
 	"layeh.com/radius":            &mirror{GH, "layeh", "radius", ""},
 	"mvdan.cc":                    mirrorFn(mvdanCcResolver),
 	"rsc.io":                      mirrorFn(rscIoResolver),

tuple/tuple.go

@@ -70,11 +70,7 @@ func parseSpec(spec string) (string, string, error) {
 
 	switch len(parts) {
 	case 1:
-		// must be a versionless local filesystem "replace" spec rhs
-		if isFilesystemPath(parts[0]) {
-			return parts[0], "", nil
-		}
-		return "", "", fmt.Errorf("unexpected spec format: %q", spec)
+		return parts[0], "", nil
 	case 2:
 		// regular spec
 		if tagRx.MatchString(parts[1]) {

tuple/tuple_test.go

@@ -53,9 +53,6 @@ func TestParseRegularSpecFail(t *testing.T) {
 	examples := [][]string{
 		// spec, expected error
 
-		// missing version
-		{"github.com/pkg/errors", "unexpected spec format"},
-
 		// extra stuff
 		{"github.com/pkg/errors v1.0.0 v2.0.0", "unexpected number of fields"},
 
@@ -114,25 +111,3 @@ func TestPackageReplace(t *testing.T) {
 		}
 	}
 }
-
-func TestPackageReplaceFail(t *testing.T) {
-	examples := [][]string{
-		// spec, expected error
-
-		// // missing version in the left spec
-		// {"github.com/hashicorp/consul/api => ./api", "unexpected spec format"},
-
-		// missing version in the right spec
-		{"github.com/spf13/cobra v0.0.0-20180412120829-615425954c3b => github.com/rsteube/cobra", "unexpected spec format"},
-	}
-
-	for i, x := range examples {
-		_, err := Parse(x[0])
-		if err == nil {
-			t.Fatal("expected err to not be nil")
-		}
-		if !strings.HasPrefix(err.Error(), x[1]) {
-			t.Errorf("(%d) expected err to start with %q, got %q", i, x[1], err.Error())
-		}
-	}
-}