navidrome/scanner/walk_dir_tree_test.go
Deluan Quintão 7fa13761d7
fix(scanner): resolve file symlinks with the production local storage FS (#5755)
* fix(scanner): resolve file symlinks with the production local storage FS

The symlink classification added for GHSA-r5qr-m328-qcf4 relied on
fs.ReadLink, but the local storage FS wraps os.DirFS behind the fs.FS
interface, hiding its ReadLinkFS implementation. Every resolution failed
at the first hop, so the scanner silently skipped ALL file symlinks,
regardless of target or the FollowSymlinks setting. Libraries made of
symlinks (e.g. shared-pool setups) lost all their tracks after
upgrading to 0.63.

The local storage now exposes full OS-level resolution (EvalSymlinks)
through a new optional storage.SymlinkResolverFS interface, which the
scanner prefers over the fs.ReadLink hop loop. This also classifies a
chain by its FINAL target even when it passes through an audio-named
intermediate outside the library, closing a bypass the hop loop had.

Regular (non-symlink) entries keep the same early-return path, so scan
performance is unaffected for normal libraries.

Fixes #5752

* fix(test): keep watcher specs off the real local storage

The watcher specs spawn watchLibrary goroutines that are not joined on
spec teardown. Now that the scanner test binary registers the file://
storage, those leaked goroutines reached newLocalStorage, which reads
conf.Server on construction, racing with the configtest cleanup that
restores the config snapshot (caught by CI's race detector). Point the
mock libraries at a fake storage scheme, which never touches the config
and does not support watching, so the goroutine exits immediately.

* fix(storage): reject invalid fs paths in ResolveSymlink

Defense-in-depth for the SymlinkResolverFS contract: names must be valid
fs.FS paths. A lexical ".." in the name would otherwise escape the
library root via filepath.Join cleaning. No current caller can produce
such a name (they come from ReadDir walks), but the guard enforces the
documented contract at the boundary.
2026-07-10 10:52:05 -04:00

780 lines
25 KiB
Go

package scanner
import (
"context"
"fmt"
"io/fs"
"os"
"path/filepath"
"testing/fstest"
"github.com/navidrome/navidrome/conf"
"github.com/navidrome/navidrome/conf/configtest"
"github.com/navidrome/navidrome/core/storage"
"github.com/navidrome/navidrome/model"
"github.com/navidrome/navidrome/tests"
. "github.com/onsi/ginkgo/v2"
. "github.com/onsi/gomega"
"golang.org/x/sync/errgroup"
)
var _ = Describe("walk_dir_tree", func() {
Describe("walkDirTree", func() {
var (
fsys storage.MusicFS
job *scanJob
ctx context.Context
)
Context("full library", func() {
BeforeEach(func() {
DeferCleanup(configtest.SetupConfig())
ctx = GinkgoT().Context()
fsys = &mockMusicFS{
FS: fstest.MapFS{
"root/a/.ndignore": {Data: []byte("ignored/*")},
"root/a/f1.mp3": {},
"root/a/f2.mp3": {},
"root/a/ignored/bad.mp3": {},
"root/b/cover.jpg": {},
"root/c/f3": {},
"root/d": {},
"root/d/.ndignore": {},
"root/d/f1.mp3": {},
"root/d/f2.mp3": {},
"root/d/f3.mp3": {},
"root/e/original/f1.mp3": {},
"root/e/symlink": {Mode: fs.ModeSymlink, Data: []byte("original")},
"root/f/realsong.mp3": {Data: []byte("AUDIO")},
"root/f/legit.mp3": {Mode: fs.ModeSymlink, Data: []byte("realsong.mp3")},
"root/f/secret": {Data: []byte("TOPSECRET")},
"root/f/evil.mp3": {Mode: fs.ModeSymlink, Data: []byte("secret")},
"root/g/.Hack Sign Original Soundtrack/track.mp3": {},
"root/h/.hidden.mp3": {},
"root/i/.git/config": {},
"root/i/.streams/stream.mp3": {},
},
}
job = &scanJob{
fs: fsys,
lib: model.Library{Path: "/music"},
}
})
// Helper function to call walkDirTree and collect folders from the results channel
getFolders := func() map[string]*folderEntry {
results, err := walkDirTree(ctx, job)
Expect(err).ToNot(HaveOccurred())
folders := map[string]*folderEntry{}
g := errgroup.Group{}
g.Go(func() error {
for folder := range results {
folders[folder.path] = folder
}
return nil
})
_ = g.Wait()
return folders
}
DescribeTable("symlink handling",
func(followSymlinks bool, expectedFolderCount int) {
conf.Server.Scanner.FollowSymlinks = followSymlinks
folders := getFolders()
Expect(folders).To(HaveLen(expectedFolderCount + 2)) // +2 for `.` and `root`
// Basic folder structure checks
Expect(folders["root/a"].audioFiles).To(SatisfyAll(
HaveLen(2),
HaveKey("f1.mp3"),
HaveKey("f2.mp3"),
))
Expect(folders["root/a"].imageFiles).To(BeEmpty())
Expect(folders["root/b"].audioFiles).To(BeEmpty())
Expect(folders["root/b"].imageFiles).To(SatisfyAll(
HaveLen(1),
HaveKey("cover.jpg"),
))
Expect(folders["root/c"].audioFiles).To(BeEmpty())
Expect(folders["root/c"].imageFiles).To(BeEmpty())
Expect(folders).ToNot(HaveKey("root/d"))
// By default (Scanner.IgnoreDotFolders == true), dot-prefixed
// folders are skipped, dot-prefixed files are not indexed, and
// the special ignoredDirs (.git, .streams) are never traversed.
Expect(folders).ToNot(HaveKey("root/g/.Hack Sign Original Soundtrack"))
Expect(folders["root/h"].audioFiles).To(BeEmpty())
Expect(folders).ToNot(HaveKey("root/i/.git"))
Expect(folders).ToNot(HaveKey("root/i/.streams"))
// Symlink specific checks
if followSymlinks {
Expect(folders["root/e/symlink"].audioFiles).To(HaveLen(1))
Expect(folders["root/f"].audioFiles).To(HaveKey("legit.mp3"))
Expect(folders["root/f"].audioFiles).To(HaveKey("realsong.mp3"))
Expect(folders["root/f"].audioFiles).ToNot(HaveKey("evil.mp3"))
} else {
Expect(folders).ToNot(HaveKey("root/e/symlink"))
Expect(folders["root/f"].audioFiles).To(HaveKey("realsong.mp3"))
Expect(folders["root/f"].audioFiles).ToNot(HaveKey("legit.mp3"))
Expect(folders["root/f"].audioFiles).ToNot(HaveKey("evil.mp3"))
}
},
Entry("with symlinks enabled", true, 11),
Entry("with symlinks disabled", false, 10),
)
DescribeTable("dot-prefixed folders with IgnoreDotFolders disabled",
func(followSymlinks bool) {
conf.Server.Scanner.FollowSymlinks = followSymlinks
conf.Server.Scanner.IgnoreDotFolders = false
folders := getFolders()
// Dot-prefixed album folders are now traversed and indexed
Expect(folders["root/g/.Hack Sign Original Soundtrack"].audioFiles).To(SatisfyAll(
HaveLen(1),
HaveKey("track.mp3"),
))
// Dot-prefixed files are still ignored, even with the flag off
Expect(folders["root/h"].audioFiles).To(BeEmpty())
// Special ignoredDirs remain blocked regardless of the flag
Expect(folders).ToNot(HaveKey("root/i/.git"))
Expect(folders).ToNot(HaveKey("root/i/.streams"))
},
Entry("with symlinks enabled", true),
Entry("with symlinks disabled", false),
)
})
Context("with target folders", func() {
BeforeEach(func() {
DeferCleanup(configtest.SetupConfig())
ctx = GinkgoT().Context()
fsys = &mockMusicFS{
FS: fstest.MapFS{
"Artist/Album1/track1.mp3": {},
"Artist/Album1/track2.mp3": {},
"Artist/Album2/track1.mp3": {},
"Artist/Album2/track2.mp3": {},
"Artist/Album2/Sub/track3.mp3": {},
"OtherArtist/Album3/track1.mp3": {},
},
}
job = &scanJob{
fs: fsys,
lib: model.Library{Path: "/music"},
}
})
It("should recursively walk all subdirectories of target folders", func() {
results, err := walkDirTree(ctx, job, "Artist")
Expect(err).ToNot(HaveOccurred())
folders := map[string]*folderEntry{}
g := errgroup.Group{}
g.Go(func() error {
for folder := range results {
folders[folder.path] = folder
}
return nil
})
_ = g.Wait()
// Should include the target folder and all its descendants
Expect(folders).To(SatisfyAll(
HaveKey("Artist"),
HaveKey("Artist/Album1"),
HaveKey("Artist/Album2"),
HaveKey("Artist/Album2/Sub"),
))
// Should not include folders outside the target
Expect(folders).ToNot(HaveKey("OtherArtist"))
Expect(folders).ToNot(HaveKey("OtherArtist/Album3"))
// Verify audio files are present
Expect(folders["Artist/Album1"].audioFiles).To(HaveLen(2))
Expect(folders["Artist/Album2"].audioFiles).To(HaveLen(2))
Expect(folders["Artist/Album2/Sub"].audioFiles).To(HaveLen(1))
})
It("should handle multiple target folders", func() {
results, err := walkDirTree(ctx, job, "Artist/Album1", "OtherArtist")
Expect(err).ToNot(HaveOccurred())
folders := map[string]*folderEntry{}
g := errgroup.Group{}
g.Go(func() error {
for folder := range results {
folders[folder.path] = folder
}
return nil
})
_ = g.Wait()
// Should include both target folders and their descendants
Expect(folders).To(SatisfyAll(
HaveKey("Artist/Album1"),
HaveKey("OtherArtist"),
HaveKey("OtherArtist/Album3"),
))
// Should not include other folders
Expect(folders).ToNot(HaveKey("Artist"))
Expect(folders).ToNot(HaveKey("Artist/Album2"))
Expect(folders).ToNot(HaveKey("Artist/Album2/Sub"))
})
It("should skip non-existent target folders and preserve them in lastUpdates", func() {
// Setup job with lastUpdates for both existing and non-existing folders
job.lastUpdates = map[string]model.FolderUpdateInfo{
model.FolderID(job.lib, "Artist/Album1"): {},
model.FolderID(job.lib, "NonExistent/DeletedFolder"): {},
model.FolderID(job.lib, "OtherArtist/Album3"): {},
}
// Try to scan existing folder and non-existing folder
results, err := walkDirTree(ctx, job, "Artist/Album1", "NonExistent/DeletedFolder")
Expect(err).ToNot(HaveOccurred())
// Collect results
folders := map[string]struct{}{}
for folder := range results {
folders[folder.path] = struct{}{}
}
// Should only include the existing folder
Expect(folders).To(HaveKey("Artist/Album1"))
Expect(folders).ToNot(HaveKey("NonExistent/DeletedFolder"))
// The non-existent folder should still be in lastUpdates (not removed by popLastUpdate)
Expect(job.lastUpdates).To(HaveKey(model.FolderID(job.lib, "NonExistent/DeletedFolder")))
// The existing folder should have been removed from lastUpdates
Expect(job.lastUpdates).ToNot(HaveKey(model.FolderID(job.lib, "Artist/Album1")))
// Folders not in targets should remain in lastUpdates
Expect(job.lastUpdates).To(HaveKey(model.FolderID(job.lib, "OtherArtist/Album3")))
})
})
})
Describe("helper functions", func() {
dir, _ := os.Getwd()
fsys := os.DirFS(dir)
baseDir := filepath.Join("tests", "fixtures")
Describe("isDirOrSymlinkToDir", func() {
BeforeEach(func() {
DeferCleanup(configtest.SetupConfig())
})
Context("with symlinks enabled", func() {
BeforeEach(func() {
tests.SkipOnWindows("symlink semantics")
conf.Server.Scanner.FollowSymlinks = true
})
DescribeTable("returns expected result",
func(dirName string, expected bool) {
dirEntry := getDirEntry("tests/fixtures", dirName)
Expect(isDirOrSymlinkToDir(fsys, baseDir, dirEntry)).To(Equal(expected))
},
Entry("normal dir", "empty_folder", true),
Entry("symlink to dir", "symlink2dir", true),
Entry("regular file", "test.mp3", false),
Entry("symlink to file", "symlink", false),
)
})
Context("with symlinks disabled", func() {
BeforeEach(func() {
conf.Server.Scanner.FollowSymlinks = false
})
DescribeTable("returns expected result",
func(dirName string, expected bool) {
dirEntry := getDirEntry("tests/fixtures", dirName)
Expect(isDirOrSymlinkToDir(fsys, baseDir, dirEntry)).To(Equal(expected))
},
Entry("normal dir", "empty_folder", true),
Entry("symlink to dir", "symlink2dir", false),
Entry("regular file", "test.mp3", false),
Entry("symlink to file", "symlink", false),
)
})
})
Describe("resolveEntryName", func() {
var fsys fs.FS
BeforeEach(func() {
DeferCleanup(configtest.SetupConfig())
fsys = fstest.MapFS{
"dir/real.mp3": {Data: []byte("AUDIO")},
"dir/mid.mp3": {Mode: fs.ModeSymlink, Data: []byte("real.mp3")},
"dir/chain.mp3": {Mode: fs.ModeSymlink, Data: []byte("mid.mp3")},
"dir/audio.mp3": {Mode: fs.ModeSymlink, Data: []byte("real.mp3")},
"dir/evil.mp3": {Mode: fs.ModeSymlink, Data: []byte("../outside/passwd")},
"dir/loop1.mp3": {Mode: fs.ModeSymlink, Data: []byte("loop2.mp3")},
"dir/loop2.mp3": {Mode: fs.ModeSymlink, Data: []byte("loop1.mp3")},
"dir/dangle.mp3": {Mode: fs.ModeSymlink, Data: []byte("missing.mp3")},
}
})
resolve := func(name string) (string, bool) {
entries, err := fs.ReadDir(fsys, "dir")
Expect(err).ToNot(HaveOccurred())
for _, e := range entries {
if e.Name() == name {
return resolveEntryName(GinkgoT().Context(), fsys, "dir", e)
}
}
Fail("entry not found: " + name)
return "", false
}
Context("with symlinks enabled", func() {
BeforeEach(func() { conf.Server.Scanner.FollowSymlinks = true })
It("returns the entry name for a plain file", func() {
name, ok := resolve("real.mp3")
Expect(ok).To(BeTrue())
Expect(name).To(Equal("real.mp3"))
})
It("resolves a direct symlink to its audio target name", func() {
name, ok := resolve("audio.mp3")
Expect(ok).To(BeTrue())
Expect(name).To(Equal("real.mp3"))
})
It("resolves a symlink CHAIN to the final target name", func() {
name, ok := resolve("chain.mp3")
Expect(ok).To(BeTrue())
Expect(name).To(Equal("real.mp3"))
})
It("resolves a symlink to a non-audio target name (so caller can reject it)", func() {
name, ok := resolve("evil.mp3")
Expect(ok).To(BeTrue())
Expect(name).To(Equal("passwd"))
})
It("rejects a symlink loop", func() {
_, ok := resolve("loop1.mp3")
Expect(ok).To(BeFalse())
})
})
Context("with symlinks disabled", func() {
BeforeEach(func() { conf.Server.Scanner.FollowSymlinks = false })
It("returns the entry name for a plain file", func() {
name, ok := resolve("real.mp3")
Expect(ok).To(BeTrue())
Expect(name).To(Equal("real.mp3"))
})
It("skips any file symlink", func() {
_, ok := resolve("audio.mp3")
Expect(ok).To(BeFalse())
})
})
})
Describe("symlink chain (real fs)", func() {
BeforeEach(func() {
tests.SkipOnWindows("symlink semantics")
DeferCleanup(configtest.SetupConfig())
})
classify := func(fsys fs.FS, dirPath, name string) (string, bool) {
entries, err := fs.ReadDir(fsys, dirPath)
Expect(err).ToNot(HaveOccurred())
for _, e := range entries {
if e.Name() == name {
return resolveEntryName(GinkgoT().Context(), fsys, dirPath, e)
}
}
Fail("entry not found: " + name)
return "", false
}
Context("committed 3-level fixtures", func() {
// tests.Init chdirs to the repo root, so the committed fixtures are at "tests/fixtures".
var fsys fs.FS
BeforeEach(func() {
conf.Server.Scanner.FollowSymlinks = true
wd, err := os.Getwd()
Expect(err).ToNot(HaveOccurred())
fsys = os.DirFS(wd)
})
It("keeps a 3-level chain that resolves to real audio", func() {
name, ok := classify(fsys, "tests/fixtures/symlink_chain", "level3.mp3")
Expect(ok).To(BeTrue())
Expect(name).To(Equal("test.mp3"))
Expect(model.IsAudioFile(name)).To(BeTrue())
})
It("rejects a 3-level chain that resolves to a non-audio file", func() {
name, ok := classify(fsys, "tests/fixtures/symlink_chain", "evil3.mp3")
Expect(ok).To(BeTrue())
Expect(name).To(Equal("index.html"))
Expect(model.IsAudioFile(name)).To(BeFalse())
})
It("skips the chain entirely when FollowSymlinks is disabled", func() {
conf.Server.Scanner.FollowSymlinks = false
_, ok := classify(fsys, "tests/fixtures/symlink_chain", "level3.mp3")
Expect(ok).To(BeFalse())
_, ok = classify(fsys, "tests/fixtures/symlink_chain", "evil3.mp3")
Expect(ok).To(BeFalse())
})
})
// Regression for #5752: the production localFS must resolve file symlinks.
// It wraps os.DirFS behind the fs.FS interface, so fs.ReadLink-based
// resolution is not available and full OS-level resolution is required.
Context("production local storage FS", func() {
var libRoot string
var musicFS storage.MusicFS
BeforeEach(func() {
conf.Server.Scanner.FollowSymlinks = true
// Reproduces the reported layout: a "pool" with the real files and a
// library containing only symlinks into the pool.
base := GinkgoT().TempDir()
pool := filepath.Join(base, "pool")
libRoot = filepath.Join(base, "userlib")
Expect(os.MkdirAll(pool, 0755)).To(Succeed())
Expect(os.MkdirAll(libRoot, 0755)).To(Succeed())
Expect(os.WriteFile(filepath.Join(pool, "real.mp3"), []byte("AUDIO"), 0600)).To(Succeed())
Expect(os.WriteFile(filepath.Join(pool, "secrets.txt"), []byte("TOPSECRET"), 0600)).To(Succeed())
// mid.wav lives OUTSIDE the library and has an audio name, but points at a
// non-audio file. A chain through it must be classified by the FINAL target.
Expect(os.Symlink(filepath.Join(pool, "secrets.txt"), filepath.Join(pool, "mid.wav"))).To(Succeed())
Expect(os.Symlink("../pool/real.mp3", filepath.Join(libRoot, "relative.mp3"))).To(Succeed())
Expect(os.Symlink(filepath.Join(pool, "real.mp3"), filepath.Join(libRoot, "absolute.mp3"))).To(Succeed())
Expect(os.Symlink(filepath.Join(pool, "mid.wav"), filepath.Join(libRoot, "evil.wav"))).To(Succeed())
Expect(os.Symlink(filepath.Join(pool, "missing.mp3"), filepath.Join(libRoot, "broken.mp3"))).To(Succeed())
u, err := storage.LocalPathToURL(libRoot)
Expect(err).ToNot(HaveOccurred())
s, err := storage.For(u.String())
Expect(err).ToNot(HaveOccurred())
musicFS, err = s.FS()
Expect(err).ToNot(HaveOccurred())
})
walkRoot := func() *folderEntry {
job := &scanJob{fs: musicFS, lib: model.Library{Path: libRoot}}
results, err := walkDirTree(GinkgoT().Context(), job)
Expect(err).ToNot(HaveOccurred())
var root *folderEntry
for folder := range results {
if folder.path == "." {
root = folder
}
}
Expect(root).ToNot(BeNil())
return root
}
It("imports symlinks to out-of-library audio files", func() {
root := walkRoot()
Expect(root.audioFiles).To(HaveKey("relative.mp3"))
Expect(root.audioFiles).To(HaveKey("absolute.mp3"))
})
It("rejects a chain that ends in a non-audio file, even through an audio-named intermediate", func() {
root := walkRoot()
Expect(root.audioFiles).ToNot(HaveKey("evil.wav"))
})
It("skips broken symlinks", func() {
root := walkRoot()
Expect(root.audioFiles).ToNot(HaveKey("broken.mp3"))
})
It("skips all file symlinks when FollowSymlinks is disabled", func() {
conf.Server.Scanner.FollowSymlinks = false
root := walkRoot()
Expect(root.audioFiles).To(BeEmpty())
})
})
Context("out-of-tree escape (temp dir)", func() {
var root string
BeforeEach(func() {
conf.Server.Scanner.FollowSymlinks = true
root = GinkgoT().TempDir()
outside := GinkgoT().TempDir()
Expect(os.WriteFile(filepath.Join(outside, "passwd"), []byte("TOPSECRET"), 0600)).To(Succeed())
Expect(os.WriteFile(filepath.Join(outside, "real.flac"), []byte("AUDIO"), 0600)).To(Succeed())
Expect(os.WriteFile(filepath.Join(root, "song.mp3"), []byte("AUDIO"), 0600)).To(Succeed())
// evil.mp3 escapes to a non-audio target; legit.flac is a valid out-of-tree audio symlink.
Expect(os.Symlink(filepath.Join(outside, "passwd"), filepath.Join(root, "evil.mp3"))).To(Succeed())
Expect(os.Symlink(filepath.Join(outside, "real.flac"), filepath.Join(root, "legit.flac"))).To(Succeed())
})
It("rejects the absolute-path escape but keeps legit out-of-tree audio", func() {
fsys := os.DirFS(root)
name, ok := classify(fsys, ".", "song.mp3")
Expect(ok).To(BeTrue())
Expect(model.IsAudioFile(name)).To(BeTrue())
name, ok = classify(fsys, ".", "legit.flac")
Expect(ok).To(BeTrue())
Expect(model.IsAudioFile(name)).To(BeTrue())
name, ok = classify(fsys, ".", "evil.mp3")
Expect(ok).To(BeTrue())
Expect(model.IsAudioFile(name)).To(BeFalse())
})
It("skips all file symlinks when FollowSymlinks is disabled", func() {
conf.Server.Scanner.FollowSymlinks = false
fsys := os.DirFS(root)
entries, err := fs.ReadDir(fsys, ".")
Expect(err).ToNot(HaveOccurred())
for _, e := range entries {
_, ok := resolveEntryName(GinkgoT().Context(), fsys, ".", e)
if e.Type()&fs.ModeSymlink != 0 {
Expect(ok).To(BeFalse(), e.Name())
} else {
Expect(ok).To(BeTrue(), e.Name())
}
}
})
})
})
Describe("isDirIgnored", func() {
DescribeTable("returns expected result",
func(dirName string, expected bool) {
Expect(isDirIgnored(dirName)).To(Equal(expected))
},
Entry("normal dir", "empty_folder", false),
Entry("dot-prefixed album dir", ".Hack Sign Original Soundtrack", false),
Entry("git dir", ".git", true),
Entry("streams dir", ".streams", true),
Entry("dir starting with ellipsis", "...unhidden_folder", false),
Entry("recycle bin", "$Recycle.Bin", true),
Entry("snapshot dir", "#snapshot", true),
)
})
Describe("isIgnoredEntry", func() {
BeforeEach(func() {
DeferCleanup(configtest.SetupConfig())
})
DescribeTable("with IgnoreDotFolders enabled (default)",
func(name string, isDir, expected bool) {
conf.Server.Scanner.IgnoreDotFolders = true
Expect(isIgnoredEntry(name, isDir)).To(Equal(expected))
},
Entry("normal dir", "Album", true, false),
Entry("normal file", "track.mp3", false, false),
Entry("dot folder", ".Hack Sign Original Soundtrack", true, true),
Entry("dot file", ".hidden.mp3", false, true),
Entry("blocklisted dir", ".git", true, true),
Entry("ellipsis dir", "...unhidden", true, false),
)
DescribeTable("with IgnoreDotFolders disabled",
func(name string, isDir, expected bool) {
conf.Server.Scanner.IgnoreDotFolders = false
Expect(isIgnoredEntry(name, isDir)).To(Equal(expected))
},
Entry("normal dir", "Album", true, false),
Entry("normal file", "track.mp3", false, false),
Entry("dot folder is allowed", ".Hack Sign Original Soundtrack", true, false),
Entry("dot file is still ignored", ".hidden.mp3", false, true),
Entry("blocklisted dir still ignored", ".git", true, true),
)
})
Describe("isDotEntry", func() {
DescribeTable("returns expected result",
func(name string, expected bool) {
Expect(isDotEntry(name)).To(Equal(expected))
},
Entry("dot folder", ".Hidden", true),
Entry("dot file", ".hidden.mp3", true),
Entry("current dir", ".", false),
Entry("parent dir", "..", false),
Entry("two leading dots", "..foo", false),
Entry("ellipsis", "...unhidden", false),
Entry("normal name", "Album", false),
)
})
Describe("fullReadDir", func() {
var (
fsys fakeFS
ctx context.Context
)
BeforeEach(func() {
ctx = GinkgoT().Context()
fsys = fakeFS{MapFS: fstest.MapFS{
"root/a/f1": {},
"root/b/f2": {},
"root/c/f3": {},
}}
})
DescribeTable("reading directory entries",
func(failOn string, expectedErr error, expectedNames []string) {
fsys.failOn = failOn
fsys.err = expectedErr
dir, _ := fsys.Open("root")
entries := fullReadDir(ctx, dir.(fs.ReadDirFile))
Expect(entries).To(HaveLen(len(expectedNames)))
for i, name := range expectedNames {
Expect(entries[i].Name()).To(Equal(name))
}
},
Entry("reads all entries", "", nil, []string{"a", "b", "c"}),
Entry("skips entries with permission error", "b", nil, []string{"a", "c"}),
Entry("aborts on fs.ErrNotExist", "", fs.ErrNotExist, []string{}),
)
})
})
})
type fakeFS struct {
fstest.MapFS
failOn string
err error
}
func (f *fakeFS) Open(name string) (fs.File, error) {
dir, err := f.MapFS.Open(name)
return &fakeDirFile{File: dir, fail: f.failOn, err: f.err}, err
}
type fakeDirFile struct {
fs.File
entries []fs.DirEntry
pos int
fail string
err error
}
// Only works with n == -1
func (fd *fakeDirFile) ReadDir(int) ([]fs.DirEntry, error) {
if fd.err != nil {
return nil, fd.err
}
if fd.entries == nil {
fd.entries, _ = fd.File.(fs.ReadDirFile).ReadDir(-1)
}
var dirs []fs.DirEntry
for {
if fd.pos >= len(fd.entries) {
break
}
e := fd.entries[fd.pos]
fd.pos++
if e.Name() == fd.fail {
return dirs, &fs.PathError{Op: "lstat", Path: e.Name(), Err: fs.ErrPermission}
}
dirs = append(dirs, e)
}
return dirs, nil
}
func getDirEntry(baseDir, name string) os.DirEntry {
dirEntries, _ := os.ReadDir(baseDir)
for _, entry := range dirEntries {
if entry.Name() == name {
return entry
}
}
panic(fmt.Sprintf("Could not find %s in %s", name, baseDir))
}
// mockMusicFS is a mock implementation of the MusicFS interface that supports symlinks
type mockMusicFS struct {
storage.MusicFS
fs.FS
}
// Open resolves symlinks
func (m *mockMusicFS) Open(name string) (fs.File, error) {
f, err := m.FS.Open(name)
if err != nil {
return nil, err
}
info, err := f.Stat()
if err != nil {
f.Close()
return nil, err
}
if info.Mode()&fs.ModeSymlink != 0 {
// For symlinks, read the target path from the Data field
target := string(m.FS.(fstest.MapFS)[name].Data)
f.Close()
return m.FS.Open(target)
}
return f, nil
}
// Stat uses Open to resolve symlinks
func (m *mockMusicFS) Stat(name string) (fs.FileInfo, error) {
f, err := m.Open(name)
if err != nil {
return nil, err
}
defer f.Close()
return f.Stat()
}
// ReadDir uses Open to resolve symlinks
func (m *mockMusicFS) ReadDir(name string) ([]fs.DirEntry, error) {
f, err := m.Open(name)
if err != nil {
return nil, err
}
defer f.Close()
if dirFile, ok := f.(fs.ReadDirFile); ok {
return dirFile.ReadDir(-1)
}
return nil, fmt.Errorf("not a directory")
}
// ReadLink returns the target of the named symbolic link (implements fs.ReadLinkFS).
func (m *mockMusicFS) ReadLink(name string) (string, error) {
mapFS := m.FS.(fstest.MapFS)
entry, ok := mapFS[name]
if !ok {
return "", &fs.PathError{Op: "readlink", Path: name, Err: fs.ErrNotExist}
}
if entry.Mode&fs.ModeSymlink == 0 {
return "", &fs.PathError{Op: "readlink", Path: name, Err: fmt.Errorf("not a symlink")}
}
return string(entry.Data), nil
}
// Lstat returns FileInfo for the named file without following symlinks (implements fs.ReadLinkFS).
func (m *mockMusicFS) Lstat(name string) (fs.FileInfo, error) {
mapFS := m.FS.(fstest.MapFS)
if _, ok := mapFS[name]; !ok {
return nil, &fs.PathError{Op: "lstat", Path: name, Err: fs.ErrNotExist}
}
f, err := m.FS.Open(name)
if err != nil {
return nil, err
}
defer f.Close()
return f.Stat()
}