Bumping k8s dependencies to 1.13

vendor/k8s.io/kubernetes/hack/make-rules/helpers/go2make/pkgwalk.go

@@ -0,0 +1,117 @@
+/*
+Copyright 2017 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package main
+
+import (
+	"fmt"
+	"go/build"
+	"os"
+	"path"
+	"sort"
+)
+
+// VisitFunc is a function called by WalkPkg to examine a single package.
+type VisitFunc func(importPath string, absPath string) error
+
+// ErrSkipPkg can be returned by a VisitFunc to indicate that the package in
+// question should not be walked any further.
+var ErrSkipPkg = fmt.Errorf("package skipped")
+
+// WalkPkg recursively visits all packages under pkgName.  This is similar
+// to filepath.Walk, except that it follows symlinks.  A package is always
+// visited before the children of that package.  If visit returns ErrSkipPkg,
+// pkgName will not be walked.
+func WalkPkg(pkgName string, visit VisitFunc) error {
+	// Visit the package itself.
+	pkg, err := findPackage(pkgName)
+	if err != nil {
+		return err
+	}
+	if err := visit(pkg.ImportPath, pkg.Dir); err == ErrSkipPkg {
+		return nil
+	} else if err != nil {
+		return err
+	}
+
+	// Read all of the child dirents and find sub-packages.
+	infos, err := readDirInfos(pkg.Dir)
+	if err != nil {
+		return err
+	}
+	for _, info := range infos {
+		if !info.IsDir() {
+			continue
+		}
+		name := info.Name()
+		if name[0] == '_' || (len(name) > 1 && name[0] == '.') || name == "testdata" {
+			continue
+		}
+		// Don't use path.Join() because it drops leading `./` via path.Clean().
+		err := WalkPkg(pkgName+"/"+name, visit)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// findPackage finds a Go package.
+func findPackage(pkgName string) (*build.Package, error) {
+	debug("find", pkgName)
+	pkg, err := build.Import(pkgName, getwd(), build.FindOnly)
+	if err != nil {
+		return nil, err
+	}
+	return pkg, nil
+}
+
+// readDirInfos returns a list of os.FileInfo structures for the dirents under
+// dirPath.  The result list is sorted by name.  This is very similar to
+// ioutil.ReadDir, except that it follows symlinks.
+func readDirInfos(dirPath string) ([]os.FileInfo, error) {
+	names, err := readDirNames(dirPath)
+	if err != nil {
+		return nil, err
+	}
+	sort.Strings(names)
+
+	infos := make([]os.FileInfo, 0, len(names))
+	for _, n := range names {
+		info, err := os.Stat(path.Join(dirPath, n))
+		if err != nil {
+			return nil, err
+		}
+		infos = append(infos, info)
+	}
+	return infos, nil
+}
+
+// readDirNames returns a list of all dirents in dirPath.  The result list is
+// not sorted or filtered.
+func readDirNames(dirPath string) ([]string, error) {
+	d, err := os.Open(dirPath)
+	if err != nil {
+		return nil, err
+	}
+	defer d.Close()
+
+	names, err := d.Readdirnames(-1)
+	if err != nil {
+		return nil, err
+	}
+	return names, nil
+}