401 lines
8.9 KiB
Go
401 lines
8.9 KiB
Go
/*
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Copyright 2020 Google LLC
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package filesystem
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import (
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"fmt"
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"io/ioutil"
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"os"
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"path/filepath"
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"reflect"
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"sort"
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"testing"
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"github.com/GoogleContainerTools/kaniko/pkg/util"
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)
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func Test_ResolvePaths(t *testing.T) {
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validateResults := func(
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t *testing.T,
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actualFiles,
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expectedFiles []string,
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err error,
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) {
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if err != nil {
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t.Errorf("expected err to be nil but was %s", err)
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}
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// Sort so that comparison is against consistent order
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sort.Strings(actualFiles)
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sort.Strings(expectedFiles)
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if !reflect.DeepEqual(actualFiles, expectedFiles) {
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t.Errorf("expected files to equal %s but was %s",
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expectedFiles, actualFiles,
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)
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}
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}
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t.Run("list of files", func(t *testing.T) {
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dir, err := ioutil.TempDir("", "snapshot-test")
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if err != nil {
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t.Fatal(err)
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}
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defer os.RemoveAll(dir)
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files := []string{
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"/foo/bar.txt",
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"/baz/boom.txt",
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}
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t.Run("all are symlinks", func(t *testing.T) {
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for _, f := range files {
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fLink := filepath.Join(dir, "link", f)
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fTarget := filepath.Join(dir, "target", f)
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if err := os.MkdirAll(filepath.Dir(fTarget), 0777); err != nil {
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t.Fatal(err)
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}
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if err := ioutil.WriteFile(fTarget, []byte{}, 0777); err != nil {
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t.Fatal(err)
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}
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if err := os.MkdirAll(filepath.Dir(fLink), 0777); err != nil {
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t.Fatal(err)
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}
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if err := os.Symlink(fTarget, fLink); err != nil {
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t.Fatal(err)
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}
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}
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t.Run("none are ignored", func(t *testing.T) {
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wl := []util.IgnoreListEntry{}
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inputFiles := []string{}
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expectedFiles := []string{}
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for _, f := range files {
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link := filepath.Join(dir, "link", f)
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expectedFiles = append(expectedFiles, link)
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inputFiles = append(inputFiles, link)
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target := filepath.Join(dir, "target", f)
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expectedFiles = append(expectedFiles, target)
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}
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expectedFiles = filesWithParentDirs(expectedFiles)
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files, err := ResolvePaths(inputFiles, wl)
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validateResults(t, files, expectedFiles, err)
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})
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t.Run("some are ignored", func(t *testing.T) {
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wl := []util.IgnoreListEntry{
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{
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Path: filepath.Join(dir, "link", "baz"),
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},
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{
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Path: filepath.Join(dir, "target", "foo"),
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},
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}
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expectedFiles := []string{}
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inputFiles := []string{}
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for _, f := range files {
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link := filepath.Join(dir, "link", f)
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inputFiles = append(inputFiles, link)
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if util.IsInProvidedIgnoreList(link, wl) {
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t.Logf("skipping %s", link)
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continue
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}
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expectedFiles = append(expectedFiles, link)
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target := filepath.Join(dir, "target", f)
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if util.IsInProvidedIgnoreList(target, wl) {
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t.Logf("skipping %s", target)
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continue
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}
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expectedFiles = append(expectedFiles, target)
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}
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link := filepath.Join(dir, "link", "zoom/")
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target := filepath.Join(dir, "target", "zaam/")
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if err := os.MkdirAll(target, 0777); err != nil {
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t.Fatal(err)
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}
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if err := ioutil.WriteFile(filepath.Join(target, "meow.txt"), []byte{}, 0777); err != nil {
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t.Fatal(err)
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}
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if err := os.Symlink(target, link); err != nil {
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t.Fatal(err)
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}
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file := filepath.Join(link, "meow.txt")
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inputFiles = append(inputFiles, file)
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expectedFiles = append(expectedFiles, link)
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targetFile := filepath.Join(target, "meow.txt")
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expectedFiles = append(expectedFiles, targetFile)
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expectedFiles = filesWithParentDirs(expectedFiles)
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files, err := ResolvePaths(inputFiles, wl)
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validateResults(t, files, expectedFiles, err)
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})
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})
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})
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t.Run("empty set of files", func(t *testing.T) {
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inputFiles := []string{}
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expectedFiles := []string{}
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wl := []util.IgnoreListEntry{}
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files, err := ResolvePaths(inputFiles, wl)
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validateResults(t, files, expectedFiles, err)
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})
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}
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func Test_resolveSymlinkAncestor(t *testing.T) {
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setupDirs := func(t *testing.T) (string, string) {
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testDir, err := ioutil.TempDir("", "")
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if err != nil {
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t.Fatal(err)
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}
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targetDir := filepath.Join(testDir, "bar", "baz")
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if err := os.MkdirAll(targetDir, 0777); err != nil {
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t.Fatal(err)
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}
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targetPath := filepath.Join(targetDir, "bam.txt")
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if err := ioutil.WriteFile(targetPath, []byte("meow"), 0777); err != nil {
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t.Fatal(err)
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}
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return testDir, targetPath
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}
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t.Run("path is a symlink", func(t *testing.T) {
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testDir, targetPath := setupDirs(t)
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defer os.RemoveAll(testDir)
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linkDir := filepath.Join(testDir, "foo", "buzz")
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if err := os.MkdirAll(linkDir, 0777); err != nil {
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t.Fatal(err)
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}
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linkPath := filepath.Join(linkDir, "zoom.txt")
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if err := os.Symlink(targetPath, linkPath); err != nil {
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t.Fatal(err)
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}
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expected := linkPath
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actual, err := resolveSymlinkAncestor(linkPath)
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if err != nil {
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t.Errorf("expected err to be nil but was %s", err)
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}
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if actual != expected {
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t.Errorf("expected result to be %s not %s", expected, actual)
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}
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})
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t.Run("dir ends with / is not a symlink", func(t *testing.T) {
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testDir, _ := setupDirs(t)
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defer os.RemoveAll(testDir)
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linkDir := filepath.Join(testDir, "var", "www")
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if err := os.MkdirAll(linkDir, 0777); err != nil {
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t.Fatal(err)
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}
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expected := linkDir
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actual, err := resolveSymlinkAncestor(fmt.Sprintf("%s/", linkDir))
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if err != nil {
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t.Errorf("expected err to be nil but was %s", err)
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}
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if actual != expected {
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t.Errorf("expected result to be %s not %s", expected, actual)
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}
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})
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t.Run("path is a dead symlink", func(t *testing.T) {
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testDir, targetPath := setupDirs(t)
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defer os.RemoveAll(testDir)
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linkDir := filepath.Join(testDir, "foo", "buzz")
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if err := os.MkdirAll(linkDir, 0777); err != nil {
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t.Fatal(err)
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}
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linkPath := filepath.Join(linkDir, "zoom.txt")
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if err := os.Symlink(targetPath, linkPath); err != nil {
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t.Fatal(err)
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}
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if err := os.Remove(targetPath); err != nil {
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t.Fatal(err)
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}
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expected := linkPath
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actual, err := resolveSymlinkAncestor(linkPath)
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if err != nil {
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t.Errorf("expected err to be nil but was %s", err)
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}
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if actual != expected {
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t.Errorf("expected result to be %s not %s", expected, actual)
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}
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})
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t.Run("path is not a symlink", func(t *testing.T) {
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testDir, targetPath := setupDirs(t)
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defer os.RemoveAll(testDir)
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expected := targetPath
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actual, err := resolveSymlinkAncestor(targetPath)
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if err != nil {
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t.Errorf("expected err to be nil but was %s", err)
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}
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if actual != expected {
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t.Errorf("expected result to be %s not %s", expected, actual)
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}
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})
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t.Run("parent of path is a symlink", func(t *testing.T) {
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testDir, targetPath := setupDirs(t)
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defer os.RemoveAll(testDir)
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targetDir := filepath.Dir(targetPath)
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linkDir := filepath.Join(testDir, "foo")
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if err := os.MkdirAll(linkDir, 0777); err != nil {
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t.Fatal(err)
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}
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linkDir = filepath.Join(linkDir, "gaz")
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if err := os.Symlink(targetDir, linkDir); err != nil {
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t.Fatal(err)
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}
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linkPath := filepath.Join(linkDir, filepath.Base(targetPath))
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expected := linkDir
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actual, err := resolveSymlinkAncestor(linkPath)
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if err != nil {
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t.Errorf("expected err to be nil but was %s", err)
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}
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if actual != expected {
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t.Errorf("expected result to be %s not %s", expected, actual)
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}
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})
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t.Run("parent of path is a dead symlink", func(t *testing.T) {
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testDir, targetPath := setupDirs(t)
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defer os.RemoveAll(testDir)
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targetDir := filepath.Dir(targetPath)
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linkDir := filepath.Join(testDir, "foo")
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if err := os.MkdirAll(linkDir, 0777); err != nil {
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t.Fatal(err)
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}
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linkDir = filepath.Join(linkDir, "gaz")
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if err := os.Symlink(targetDir, linkDir); err != nil {
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t.Fatal(err)
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}
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if err := os.RemoveAll(targetDir); err != nil {
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t.Fatal(err)
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}
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linkPath := filepath.Join(linkDir, filepath.Base(targetPath))
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_, err := resolveSymlinkAncestor(linkPath)
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if err == nil {
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t.Error("expected err to not be nil")
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}
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})
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t.Run("great grandparent of path is a symlink", func(t *testing.T) {
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testDir, targetPath := setupDirs(t)
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defer os.RemoveAll(testDir)
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targetDir := filepath.Dir(targetPath)
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linkDir := filepath.Join(testDir, "foo")
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if err := os.Symlink(filepath.Dir(targetDir), linkDir); err != nil {
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t.Fatal(err)
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}
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linkPath := filepath.Join(
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linkDir,
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filepath.Join(
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filepath.Base(targetDir),
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filepath.Base(targetPath),
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),
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)
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expected := linkDir
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actual, err := resolveSymlinkAncestor(linkPath)
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if err != nil {
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t.Errorf("expected err to be nil but was %s", err)
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}
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if actual != expected {
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t.Errorf("expected result to be %s not %s", expected, actual)
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}
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})
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}
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