Fix module mount in sub folder - hugo - [fork] hugo port for 9front
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       ---
 (DIR) commit 80dd6ddde27ce36f5432fb780e94d4974b5277c7
 (DIR) parent 299731012441378bb9c057ceb0a3c277108aaf01
 (HTM) Author: Bjørn Erik Pedersen <bjorn.erik.pedersen@gmail.com>
       Date:   Fri, 31 Jan 2020 17:15:14 +0100
       
       Fix module mount in sub folder
       
       This addresses a specific issue, but is a also a major simplification of the filesystem file mounts.
       
       Fixes #6730
       
       Diffstat:
         M hugofs/decorators.go                |       3 +--
         M hugofs/fileinfo.go                  |      34 ++++++++++++++++++++++++++-----
         M hugofs/nosymlink_test.go            |       1 +
         M hugofs/rootmapping_fs.go            |     566 +++++++++++++++----------------
         M hugofs/rootmapping_fs_test.go       |     146 ++++++++++++++++++++++++-------
         M hugofs/walk.go                      |      10 +++++++++-
         M hugofs/walk_test.go                 |      21 +++++++++++++++++++++
         M hugolib/filesystems/basefs.go       |       1 +
         M hugolib/filesystems/basefs_test.go  |       2 --
         M hugolib/hugo_modules_test.go        |      45 +++++++++++++++++++++++++++++++
       
       10 files changed, 494 insertions(+), 335 deletions(-)
       ---
 (DIR) diff --git a/hugofs/decorators.go b/hugofs/decorators.go
       @@ -79,7 +79,7 @@ func DecorateBasePathFs(base *afero.BasePathFs) afero.Fs {
        }
        
        // NewBaseFileDecorator decorates the given Fs to provide the real filename
       -// and an Opener func. If
       +// and an Opener func.
        func NewBaseFileDecorator(fs afero.Fs) afero.Fs {
        
                ffs := &baseFileDecoratorFs{Fs: fs}
       @@ -102,7 +102,6 @@ func NewBaseFileDecorator(fs afero.Fs) afero.Fs {
        
                        opener := func() (afero.File, error) {
                                return ffs.open(filename)
       -
                        }
        
                        return decorateFileInfo(fi, ffs, opener, filename, "", meta), nil
 (DIR) diff --git a/hugofs/fileinfo.go b/hugofs/fileinfo.go
       @@ -18,6 +18,7 @@ import (
                "os"
                "path/filepath"
                "runtime"
       +        "sort"
                "strings"
                "time"
        
       @@ -271,13 +272,21 @@ func (fi *dirNameOnlyFileInfo) Sys() interface{} {
                return nil
        }
        
       -func newDirNameOnlyFileInfo(name string, isOrdered bool, fileOpener func() (afero.File, error)) FileMetaInfo {
       +func newDirNameOnlyFileInfo(name string, meta FileMeta, isOrdered bool, fileOpener func() (afero.File, error)) FileMetaInfo {
                name = normalizeFilename(name)
                _, base := filepath.Split(name)
       -        return NewFileMetaInfo(&dirNameOnlyFileInfo{name: base}, FileMeta{
       -                metaKeyFilename:  name,
       -                metaKeyIsOrdered: isOrdered,
       -                metaKeyOpener:    fileOpener})
       +
       +        m := copyFileMeta(meta)
       +        if _, found := m[metaKeyFilename]; !found {
       +                m.setIfNotZero(metaKeyFilename, name)
       +        }
       +        m[metaKeyOpener] = fileOpener
       +        m[metaKeyIsOrdered] = isOrdered
       +
       +        return NewFileMetaInfo(
       +                &dirNameOnlyFileInfo{name: base},
       +                m,
       +        )
        }
        
        func decorateFileInfo(
       @@ -339,3 +348,18 @@ func fileInfosToNames(fis []os.FileInfo) []string {
                }
                return names
        }
       +
       +func fromSlash(filenames []string) []string {
       +        for i, name := range filenames {
       +                filenames[i] = filepath.FromSlash(name)
       +        }
       +        return filenames
       +}
       +
       +func sortFileInfos(fis []os.FileInfo) {
       +        sort.Slice(fis, func(i, j int) bool {
       +                fimi, fimj := fis[i].(FileMetaInfo), fis[j].(FileMetaInfo)
       +                return fimi.Meta().Filename() < fimj.Meta().Filename()
       +
       +        })
       +}
 (DIR) diff --git a/hugofs/nosymlink_test.go b/hugofs/nosymlink_test.go
       @@ -137,6 +137,7 @@ func TestNoSymlinkFs(t *testing.T) {
                                c.Assert(err, qt.IsNil)
                                // There is at least one unsported symlink inside workDir
                                _, err = f.Readdir(-1)
       +                        c.Assert(err, qt.IsNil)
                                f.Close()
                                c.Assert(logger.WarnCounter.Count(), qt.Equals, uint64(1))
        
 (DIR) diff --git a/hugofs/rootmapping_fs.go b/hugofs/rootmapping_fs.go
       @@ -27,15 +27,18 @@ import (
                "github.com/spf13/afero"
        )
        
       -var filepathSeparator = string(filepath.Separator)
       +var (
       +        filepathSeparator = string(filepath.Separator)
       +)
        
        // NewRootMappingFs creates a new RootMappingFs on top of the provided with
       -// of root mappings with some optional metadata about the root.
       +// root mappings with some optional metadata about the root.
        // Note that From represents a virtual root that maps to the actual filename in To.
        func NewRootMappingFs(fs afero.Fs, rms ...RootMapping) (*RootMappingFs, error) {
                rootMapToReal := radix.New()
       +        var virtualRoots []RootMapping
        
       -        for i, rm := range rms {
       +        for _, rm := range rms {
                        (&rm).clean()
        
                        fromBase := files.ResolveComponentFolder(rm.From)
       @@ -56,11 +59,13 @@ func NewRootMappingFs(fs afero.Fs, rms ...RootMapping) (*RootMappingFs, error) {
                        }
                        // Extract "blog" from "content/blog"
                        rm.path = strings.TrimPrefix(strings.TrimPrefix(rm.From, fromBase), filepathSeparator)
       -                if rm.Meta != nil {
       -                        rm.Meta[metaKeyBaseDir] = rm.ToBasedir
       -                        rm.Meta[metaKeyMountRoot] = rm.path
       +                if rm.Meta == nil {
       +                        rm.Meta = make(FileMeta)
                        }
        
       +                rm.Meta[metaKeyBaseDir] = rm.ToBasedir
       +                rm.Meta[metaKeyMountRoot] = rm.path
       +
                        meta := copyFileMeta(rm.Meta)
        
                        if !fi.IsDir() {
       @@ -70,7 +75,7 @@ func NewRootMappingFs(fs afero.Fs, rms ...RootMapping) (*RootMappingFs, error) {
        
                        rm.fi = NewFileMetaInfo(fi, meta)
        
       -                key := rm.rootKey()
       +                key := filepathSeparator + rm.From
                        var mappings []RootMapping
                        v, found := rootMapToReal.Get(key)
                        if found {
       @@ -80,30 +85,38 @@ func NewRootMappingFs(fs afero.Fs, rms ...RootMapping) (*RootMappingFs, error) {
                        mappings = append(mappings, rm)
                        rootMapToReal.Insert(key, mappings)
        
       -                rms[i] = rm
       +                virtualRoots = append(virtualRoots, rm)
                }
        
       -        rfs := &RootMappingFs{Fs: fs,
       -                virtualRoots:  rms,
       -                rootMapToReal: rootMapToReal}
       +        rootMapToReal.Insert(filepathSeparator, virtualRoots)
       +
       +        rfs := &RootMappingFs{
       +                Fs:            fs,
       +                rootMapToReal: rootMapToReal,
       +        }
        
                return rfs, nil
        }
        
       -// NewRootMappingFsFromFromTo is a convenicence variant of NewRootMappingFs taking
       -// From and To as string pairs.
       -func NewRootMappingFsFromFromTo(fs afero.Fs, fromTo ...string) (*RootMappingFs, error) {
       +func newRootMappingFsFromFromTo(
       +        baseDir string,
       +        fs afero.Fs,
       +        fromTo ...string,
       +) (*RootMappingFs, error) {
       +
                rms := make([]RootMapping, len(fromTo)/2)
                for i, j := 0, 0; j < len(fromTo); i, j = i+1, j+2 {
                        rms[i] = RootMapping{
       -                        From: fromTo[j],
       -                        To:   fromTo[j+1],
       +                        From:      fromTo[j],
       +                        To:        fromTo[j+1],
       +                        ToBasedir: baseDir,
                        }
                }
        
                return NewRootMappingFs(fs, rms...)
        }
        
       +// RootMapping describes a virtual file or directory mount.
        type RootMapping struct {
                From      string   // The virtual mount.
                To        string   // The source directory or file.
       @@ -127,21 +140,16 @@ func (r RootMapping) filename(name string) string {
                return filepath.Join(r.To, strings.TrimPrefix(name, r.From))
        }
        
       -func (r RootMapping) rootKey() string {
       -        return r.From
       -}
       -
        // A RootMappingFs maps several roots into one. Note that the root of this filesystem
        // is directories only, and they will be returned in Readdir and Readdirnames
        // in the order given.
        type RootMappingFs struct {
                afero.Fs
                rootMapToReal *radix.Tree
       -        virtualRoots  []RootMapping
       -        filter        func(r RootMapping) bool
        }
        
        func (fs *RootMappingFs) Dirs(base string) ([]FileMetaInfo, error) {
       +        base = filepathSeparator + fs.cleanName(base)
                roots := fs.getRootsWithPrefix(base)
        
                if roots == nil {
       @@ -176,138 +184,46 @@ func (fs *RootMappingFs) Dirs(base string) ([]FileMetaInfo, error) {
                return fss, nil
        }
        
       -// LstatIfPossible returns the os.FileInfo structure describing a given file.
       -func (fs *RootMappingFs) LstatIfPossible(name string) (os.FileInfo, bool, error) {
       -        fis, _, b, err := fs.doLstat(name, false)
       -        if err != nil {
       -                return nil, b, err
       -        }
       -        return fis[0], b, nil
       -}
       -
       -func (fs *RootMappingFs) virtualDirOpener(name string, isRoot bool) func() (afero.File, error) {
       -        return func() (afero.File, error) { return &rootMappingFile{name: name, isRoot: isRoot, fs: fs}, nil }
       -}
       -
       -func (fs *RootMappingFs) doLstat(name string, allowMultiple bool) ([]FileMetaInfo, []FileMetaInfo, bool, error) {
       -        if fs.isRoot(name) {
       -                return []FileMetaInfo{newDirNameOnlyFileInfo(name, true, fs.virtualDirOpener(name, true))}, nil, false, nil
       -        }
       -
       -        roots := fs.getRoots(name)
       -        rootsWithPrefix := fs.getRootsWithPrefix(name)
       -        hasRootMappingsBelow := len(rootsWithPrefix) != 0
       -
       -        if len(roots) == 0 {
       -                if hasRootMappingsBelow {
       -                        // No exact matches, but we have root mappings below name,
       -                        // let's make it look like a directory.
       -                        return []FileMetaInfo{newDirNameOnlyFileInfo(name, true, fs.virtualDirOpener(name, false))}, nil, false, nil
       -                }
       -
       -                return nil, nil, false, os.ErrNotExist
       -        }
       -
       -        // We may have a mapping for both static and static/subdir.
       -        // These will not show in any Readdir so append them
       -        // manually.
       -        rootsInDir := fs.filterRootsBelow(rootsWithPrefix, name)
       -
       -        var (
       -                fis  []FileMetaInfo
       -                dirs []FileMetaInfo
       -                b    bool
       -                root RootMapping
       -                err  error
       -        )
       -
       -        for _, root = range roots {
       -                var fi os.FileInfo
       -                fi, b, err = fs.statRoot(root, name)
       -                if err != nil {
       -                        if os.IsNotExist(err) {
       -                                continue
       +// Filter creates a copy of this filesystem with only mappings matching a filter.
       +func (fs RootMappingFs) Filter(f func(m RootMapping) bool) *RootMappingFs {
       +        rootMapToReal := radix.New()
       +        fs.rootMapToReal.Walk(func(b string, v interface{}) bool {
       +                rms := v.([]RootMapping)
       +                var nrms []RootMapping
       +                for _, rm := range rms {
       +                        if f(rm) {
       +                                nrms = append(nrms, rm)
                                }
       -                        return nil, nil, false, err
                        }
       -                fim := fi.(FileMetaInfo)
       -
       -                fis = append(fis, fim)
       -        }
       -
       -        for _, root = range rootsInDir {
       -
       -                fi, _, err := fs.statRoot(root, "")
       -                if err != nil {
       -                        if os.IsNotExist(err) {
       -                                continue
       -                        }
       -                        return nil, nil, false, err
       +                if len(nrms) != 0 {
       +                        rootMapToReal.Insert(b, nrms)
                        }
       -                fim := fi.(FileMetaInfo)
       -                dirs = append(dirs, fim)
       -        }
       -
       -        if len(fis) == 0 && len(dirs) == 0 {
       -                return nil, nil, false, os.ErrNotExist
       -        }
       -
       -        if allowMultiple || len(fis) == 1 {
       -                return fis, dirs, b, nil
       -        }
       -
       -        if len(fis) == 0 {
       -                return nil, nil, false, os.ErrNotExist
       -        }
       -
       -        // Open it in this composite filesystem.
       -        opener := func() (afero.File, error) {
       -                return fs.Open(name)
       -        }
       +                return false
       +        })
        
       -        return []FileMetaInfo{decorateFileInfo(fis[0], fs, opener, "", "", root.Meta)}, nil, b, nil
       +        fs.rootMapToReal = rootMapToReal
        
       +        return &fs
        }
        
       -// Open opens the namedrootMappingFile file for reading.
       -func (fs *RootMappingFs) Open(name string) (afero.File, error) {
       -        if fs.isRoot(name) {
       -                return &rootMappingFile{name: name, fs: fs, isRoot: true}, nil
       -        }
       -
       -        fis, dirs, _, err := fs.doLstat(name, true)
       +// LstatIfPossible returns the os.FileInfo structure describing a given file.
       +func (fs *RootMappingFs) LstatIfPossible(name string) (os.FileInfo, bool, error) {
       +        fis, err := fs.doLstat(name)
                if err != nil {
       -                return nil, err
       +                return nil, false, err
                }
       +        return fis[0], false, nil
       +}
        
       -        if len(fis) == 1 {
       -                fi := fis[0]
       -                meta := fi.(FileMetaInfo).Meta()
       -                f, err := meta.Open()
       -                if err != nil {
       -                        return nil, err
       -                }
       -
       -                f = &rootMappingFile{File: f, fs: fs, name: name, meta: meta}
       -
       -                if len(dirs) > 0 {
       -                        return &readDirDirsAppender{File: f, dirs: dirs}, nil
       -                }
       -
       -                return f, nil
       -        }
       +// Open opens the named file for reading.
       +func (fs *RootMappingFs) Open(name string) (afero.File, error) {
       +        fis, err := fs.doLstat(name)
        
       -        f, err := fs.newUnionFile(fis...)
                if err != nil {
                        return nil, err
                }
        
       -        if len(dirs) > 0 {
       -                return &readDirDirsAppender{File: f, dirs: dirs}, nil
       -        }
       -
       -        return f, nil
       -
       +        return fs.newUnionFile(fis...)
        }
        
        // Stat returns the os.FileInfo structure describing a given file.  If there is
       @@ -318,80 +234,51 @@ func (fs *RootMappingFs) Stat(name string) (os.FileInfo, error) {
        
        }
        
       -// Filter creates a copy of this filesystem with the applied filter.
       -func (fs RootMappingFs) Filter(f func(m RootMapping) bool) *RootMappingFs {
       -        fs.filter = f
       -        return &fs
       -}
       -
       -func (fs *RootMappingFs) isRoot(name string) bool {
       -        return name == "" || name == filepathSeparator
       +func (fs *RootMappingFs) hasPrefix(prefix string) bool {
       +        hasPrefix := false
       +        fs.rootMapToReal.WalkPrefix(prefix, func(b string, v interface{}) bool {
       +                hasPrefix = true
       +                return true
       +        })
        
       +        return hasPrefix
        }
        
       -func (fs *RootMappingFs) getRoots(name string) []RootMapping {
       -        name = filepath.Clean(name)
       -        _, v, found := fs.rootMapToReal.LongestPrefix(name)
       +func (fs *RootMappingFs) getRoot(key string) []RootMapping {
       +        v, found := fs.rootMapToReal.Get(key)
                if !found {
                        return nil
                }
        
       -        rm := v.([]RootMapping)
       -
       -        return fs.applyFilterToRoots(rm)
       +        return v.([]RootMapping)
        }
        
       -func (fs *RootMappingFs) applyFilterToRoots(rm []RootMapping) []RootMapping {
       -        if fs.filter == nil {
       -                return rm
       +func (fs *RootMappingFs) getRoots(key string) (string, []RootMapping) {
       +        s, v, found := fs.rootMapToReal.LongestPrefix(key)
       +        if !found || (s == filepathSeparator && key != filepathSeparator) {
       +                return "", nil
                }
       +        return s, v.([]RootMapping)
        
       -        var filtered []RootMapping
       -        for _, m := range rm {
       -                if fs.filter(m) {
       -                        filtered = append(filtered, m)
       -                }
       -        }
       +}
       +
       +func (fs *RootMappingFs) debug() {
       +        fmt.Println("debug():")
       +        fs.rootMapToReal.Walk(func(s string, v interface{}) bool {
       +                fmt.Println("Key", s)
       +                return false
       +        })
        
       -        return filtered
        }
        
        func (fs *RootMappingFs) getRootsWithPrefix(prefix string) []RootMapping {
       -        if fs.isRoot(prefix) {
       -                return fs.virtualRoots
       -        }
       -        prefix = filepath.Clean(prefix)
                var roots []RootMapping
       -
                fs.rootMapToReal.WalkPrefix(prefix, func(b string, v interface{}) bool {
                        roots = append(roots, v.([]RootMapping)...)
                        return false
                })
        
       -        return fs.applyFilterToRoots(roots)
       -}
       -
       -// Filter out the mappings inside the name directory.
       -func (fs *RootMappingFs) filterRootsBelow(roots []RootMapping, name string) []RootMapping {
       -        if len(roots) == 0 {
       -                return nil
       -        }
       -
       -        sepCount := strings.Count(name, filepathSeparator)
       -        var filtered []RootMapping
       -        for _, x := range roots {
       -                if name == x.From {
       -                        continue
       -                }
       -
       -                if strings.Count(x.From, filepathSeparator)-sepCount != 1 {
       -                        continue
       -                }
       -
       -                filtered = append(filtered, x)
       -
       -        }
       -        return filtered
       +        return roots
        }
        
        func (fs *RootMappingFs) newUnionFile(fis ...FileMetaInfo) (afero.File, error) {
       @@ -400,6 +287,10 @@ func (fs *RootMappingFs) newUnionFile(fis ...FileMetaInfo) (afero.File, error) {
                if err != nil {
                        return nil, err
                }
       +        if len(fis) == 1 {
       +                return f, nil
       +        }
       +
                rf := &rootMappingFile{File: f, fs: fs, name: meta.Name(), meta: meta}
                if len(fis) == 1 {
                        return rf, err
       @@ -439,148 +330,241 @@ func (fs *RootMappingFs) newUnionFile(fis ...FileMetaInfo) (afero.File, error) {
        
        }
        
       -func (fs *RootMappingFs) statRoot(root RootMapping, name string) (os.FileInfo, bool, error) {
       -        filename := root.filename(name)
       +func (fs *RootMappingFs) cleanName(name string) string {
       +        return strings.Trim(filepath.Clean(name), filepathSeparator)
       +}
       +
       +func (fs *RootMappingFs) collectDirEntries(prefix string) ([]os.FileInfo, error) {
       +        prefix = filepathSeparator + fs.cleanName(prefix)
       +
       +        var fis []os.FileInfo
        
       -        var b bool
       -        var fi os.FileInfo
       -        var err error
       +        seen := make(map[string]bool) // Prevent duplicate directories
       +        level := strings.Count(prefix, filepathSeparator)
        
       -        if ls, ok := fs.Fs.(afero.Lstater); ok {
       -                fi, b, err = ls.LstatIfPossible(filename)
       +        // First add any real files/directories.
       +        rms := fs.getRoot(prefix)
       +        for _, rm := range rms {
       +                f, err := rm.fi.Meta().Open()
                        if err != nil {
       -                        return nil, b, err
       +                        return nil, err
                        }
       -
       -        } else {
       -                fi, err = fs.Fs.Stat(filename)
       +                direntries, err := f.Readdir(-1)
                        if err != nil {
       -                        return nil, b, err
       +                        f.Close()
       +                        return nil, err
                        }
       -        }
        
       -        // Opens the real directory/file.
       -        opener := func() (afero.File, error) {
       -                return fs.Fs.Open(filename)
       -        }
       +                for _, fi := range direntries {
       +                        meta := fi.(FileMetaInfo).Meta()
       +                        mergeFileMeta(rm.Meta, meta)
       +                        if fi.IsDir() {
       +                                name := fi.Name()
       +                                if seen[name] {
       +                                        continue
       +                                }
       +                                seen[name] = true
       +                                opener := func() (afero.File, error) {
       +                                        return fs.Open(filepath.Join(rm.From, name))
       +                                }
       +                                fi = newDirNameOnlyFileInfo(name, meta, false, opener)
       +                        }
        
       -        if fi.IsDir() {
       -                if name == "" {
       -                        name = root.From
       +                        fis = append(fis, fi)
                        }
       -                _, name = filepath.Split(name)
       -                fi = newDirNameOnlyFileInfo(name, false, opener)
       -        }
       -
       -        return decorateFileInfo(fi, fs.Fs, opener, "", "", root.Meta), b, nil
        
       -}
       -
       -type rootMappingFile struct {
       -        afero.File
       -        fs     *RootMappingFs
       -        name   string
       -        meta   FileMeta
       -        isRoot bool
       -}
       -
       -type readDirDirsAppender struct {
       -        afero.File
       -        dirs []FileMetaInfo
       -}
       -
       -func (f *readDirDirsAppender) Readdir(count int) ([]os.FileInfo, error) {
       -        fis, err := f.File.Readdir(count)
       -        if err != nil {
       -                return nil, err
       +                f.Close()
                }
        
       -        for _, dir := range f.dirs {
       -                fis = append(fis, dir)
       -        }
       -        return fis, nil
       -
       -}
       -
       -func (f *readDirDirsAppender) Readdirnames(count int) ([]string, error) {
       -        fis, err := f.Readdir(count)
       -        if err != nil {
       -                return nil, err
       -        }
       -        return fileInfosToNames(fis), nil
       -}
       +        // Next add any file mounts inside the given directory.
       +        prefixInside := prefix + filepathSeparator
       +        fs.rootMapToReal.WalkPrefix(prefixInside, func(s string, v interface{}) bool {
        
       -func (f *rootMappingFile) Close() error {
       -        if f.File == nil {
       -                return nil
       -        }
       -        return f.File.Close()
       -}
       +                if (strings.Count(s, filepathSeparator) - level) != 1 {
       +                        // This directory is not part of the current, but we
       +                        // need to include the first name part to make it
       +                        // navigable.
       +                        path := strings.TrimPrefix(s, prefixInside)
       +                        parts := strings.Split(path, filepathSeparator)
       +                        name := parts[0]
        
       -func (f *rootMappingFile) Name() string {
       -        return f.name
       -}
       +                        if seen[name] {
       +                                return false
       +                        }
       +                        seen[name] = true
       +                        opener := func() (afero.File, error) {
       +                                return fs.Open(path)
       +                        }
        
       -func (f *rootMappingFile) Readdir(count int) ([]os.FileInfo, error) {
       -        if f.File == nil {
       -                filesn := make([]os.FileInfo, 0)
       -                roots := f.fs.getRootsWithPrefix(f.name)
       -                seen := make(map[string]bool) // Do not return duplicate directories
       +                        fi := newDirNameOnlyFileInfo(name, nil, false, opener)
       +                        fis = append(fis, fi)
        
       -                j := 0
       -                for _, rm := range roots {
       -                        if count != -1 && j >= count {
       -                                break
       -                        }
       +                        return false
       +                }
        
       +                rms := v.([]RootMapping)
       +                for _, rm := range rms {
                                if !rm.fi.IsDir() {
                                        // A single file mount
       -                                filesn = append(filesn, rm.fi)
       +                                fis = append(fis, rm.fi)
                                        continue
                                }
       -
       -                        from := rm.From
       -                        name := from
       -                        if !f.isRoot {
       -                                _, name = filepath.Split(from)
       -                        }
       -
       +                        name := filepath.Base(rm.From)
                                if seen[name] {
                                        continue
                                }
                                seen[name] = true
        
                                opener := func() (afero.File, error) {
       -                                return f.fs.Open(from)
       +                                return fs.Open(rm.From)
                                }
        
       -                        j++
       +                        fi := newDirNameOnlyFileInfo(name, rm.Meta, false, opener)
        
       -                        fi := newDirNameOnlyFileInfo(name, false, opener)
       +                        fis = append(fis, fi)
        
       -                        if rm.Meta != nil {
       -                                mergeFileMeta(rm.Meta, fi.Meta())
       +                }
       +
       +                return false
       +        })
       +
       +        return fis, nil
       +}
       +
       +func (fs *RootMappingFs) doLstat(name string) ([]FileMetaInfo, error) {
       +        name = fs.cleanName(name)
       +        key := filepathSeparator + name
       +
       +        roots := fs.getRoot(key)
       +
       +        if roots == nil {
       +                if fs.hasPrefix(key) {
       +                        // We have directories mounted below this.
       +                        // Make it look like a directory.
       +                        return []FileMetaInfo{newDirNameOnlyFileInfo(name, nil, true, fs.virtualDirOpener(name))}, nil
       +                }
       +
       +                // Find any real files or directories with this key.
       +                _, roots := fs.getRoots(key)
       +                if roots == nil {
       +                        return nil, os.ErrNotExist
       +                }
       +
       +                var err error
       +                var fis []FileMetaInfo
       +
       +                for _, rm := range roots {
       +                        var fi FileMetaInfo
       +                        fi, _, err = fs.statRoot(rm, name)
       +                        if err == nil {
       +                                fis = append(fis, fi)
                                }
       +                }
       +
       +                if fis != nil {
       +                        return fis, nil
       +                }
        
       -                        filesn = append(filesn, fi)
       +                if err == nil {
       +                        err = os.ErrNotExist
                        }
       -                return filesn, nil
       +
       +                return nil, err
                }
        
       -        if f.File == nil {
       -                panic(fmt.Sprintf("no File for %q", f.name))
       +        fileCount := 0
       +        for _, root := range roots {
       +                if !root.fi.IsDir() {
       +                        fileCount++
       +                }
       +                if fileCount > 1 {
       +                        break
       +                }
                }
        
       -        fis, err := f.File.Readdir(count)
       +        if fileCount == 0 {
       +                // Dir only.
       +                return []FileMetaInfo{newDirNameOnlyFileInfo(name, roots[0].Meta, true, fs.virtualDirOpener(name))}, nil
       +        }
       +
       +        if fileCount > 1 {
       +                // Not supported by this filesystem.
       +                return nil, errors.Errorf("found multiple files with name %q, use .Readdir or the source filesystem directly", name)
       +
       +        }
       +
       +        return []FileMetaInfo{roots[0].fi}, nil
       +
       +}
       +
       +func (fs *RootMappingFs) statRoot(root RootMapping, name string) (FileMetaInfo, bool, error) {
       +        filename := root.filename(name)
       +
       +        fi, b, err := lstatIfPossible(fs.Fs, filename)
                if err != nil {
       -                return nil, err
       +                return nil, b, err
                }
        
       -        for i, fi := range fis {
       -                fis[i] = decorateFileInfo(fi, f.fs, nil, "", "", f.meta)
       +        var opener func() (afero.File, error)
       +        if fi.IsDir() {
       +                // Make sure metadata gets applied in Readdir.
       +                opener = fs.realDirOpener(filename, root.Meta)
       +        } else {
       +                // Opens the real file directly.
       +                opener = func() (afero.File, error) {
       +                        return fs.Fs.Open(filename)
       +                }
                }
        
       -        return fis, nil
       +        return decorateFileInfo(fi, fs.Fs, opener, "", "", root.Meta), b, nil
       +
       +}
       +
       +func (fs *RootMappingFs) virtualDirOpener(name string) func() (afero.File, error) {
       +        return func() (afero.File, error) { return &rootMappingFile{name: name, fs: fs}, nil }
       +}
       +
       +func (fs *RootMappingFs) realDirOpener(name string, meta FileMeta) func() (afero.File, error) {
       +        return func() (afero.File, error) {
       +                f, err := fs.Fs.Open(name)
       +                if err != nil {
       +                        return nil, err
       +                }
       +                return &rootMappingFile{name: name, meta: meta, fs: fs, File: f}, nil
       +        }
       +}
       +
       +type rootMappingFile struct {
       +        afero.File
       +        fs   *RootMappingFs
       +        name string
       +        meta FileMeta
       +}
       +
       +func (f *rootMappingFile) Close() error {
       +        if f.File == nil {
       +                return nil
       +        }
       +        return f.File.Close()
       +}
       +
       +func (f *rootMappingFile) Name() string {
       +        return f.name
       +}
       +
       +func (f *rootMappingFile) Readdir(count int) ([]os.FileInfo, error) {
       +        if f.File != nil {
       +                fis, err := f.File.Readdir(count)
       +                if err != nil {
       +                        return nil, err
       +                }
       +
       +                for i, fi := range fis {
       +                        fis[i] = decorateFileInfo(fi, f.fs, nil, "", "", f.meta)
       +                }
       +                return fis, nil
       +        }
       +        return f.fs.collectDirEntries(f.name)
        }
        
        func (f *rootMappingFile) Readdirnames(count int) ([]string, error) {
 (DIR) diff --git a/hugofs/rootmapping_fs_test.go b/hugofs/rootmapping_fs_test.go
       @@ -14,9 +14,10 @@
        package hugofs
        
        import (
       +        "fmt"
                "io/ioutil"
       -        "os"
                "path/filepath"
       +        "sort"
                "testing"
        
                "github.com/spf13/viper"
       @@ -34,8 +35,12 @@ func TestLanguageRootMapping(t *testing.T) {
                fs := NewBaseFileDecorator(afero.NewMemMapFs())
        
                c.Assert(afero.WriteFile(fs, filepath.Join("content/sv/svdir", "main.txt"), []byte("main sv"), 0755), qt.IsNil)
       +
                c.Assert(afero.WriteFile(fs, filepath.Join("themes/a/mysvblogcontent", "sv-f.txt"), []byte("some sv blog content"), 0755), qt.IsNil)
                c.Assert(afero.WriteFile(fs, filepath.Join("themes/a/myenblogcontent", "en-f.txt"), []byte("some en blog content in a"), 0755), qt.IsNil)
       +        c.Assert(afero.WriteFile(fs, filepath.Join("themes/a/mysvblogcontent/d1", "sv-d1-f.txt"), []byte("some sv blog content"), 0755), qt.IsNil)
       +        c.Assert(afero.WriteFile(fs, filepath.Join("themes/a/myenblogcontent/d1", "en-d1-f.txt"), []byte("some en blog content in a"), 0755), qt.IsNil)
       +
                c.Assert(afero.WriteFile(fs, filepath.Join("themes/a/myotherenblogcontent", "en-f2.txt"), []byte("some en content"), 0755), qt.IsNil)
                c.Assert(afero.WriteFile(fs, filepath.Join("themes/a/mysvdocs", "sv-docs.txt"), []byte("some sv docs content"), 0755), qt.IsNil)
                c.Assert(afero.WriteFile(fs, filepath.Join("themes/b/myenblogcontent", "en-b-f.txt"), []byte("some en content"), 0755), qt.IsNil)
       @@ -72,19 +77,30 @@ func TestLanguageRootMapping(t *testing.T) {
        
                collected, err := collectFilenames(rfs, "content", "content")
                c.Assert(err, qt.IsNil)
       -        c.Assert(collected, qt.DeepEquals, []string{"blog/en-f.txt", "blog/en-f2.txt", "blog/sv-f.txt", "blog/svdir/main.txt", "docs/sv-docs.txt"})
       -
       -        bfs := afero.NewBasePathFs(rfs, "content")
       -        collected, err = collectFilenames(bfs, "", "")
       -        c.Assert(err, qt.IsNil)
       -        c.Assert(collected, qt.DeepEquals, []string{"blog/en-f.txt", "blog/en-f2.txt", "blog/sv-f.txt", "blog/svdir/main.txt", "docs/sv-docs.txt"})
       +        c.Assert(collected, qt.DeepEquals,
       +                []string{"blog/d1/en-d1-f.txt", "blog/d1/sv-d1-f.txt", "blog/en-f.txt", "blog/en-f2.txt", "blog/sv-f.txt", "blog/svdir/main.txt", "docs/sv-docs.txt"}, qt.Commentf("%#v", collected))
        
                dirs, err := rfs.Dirs(filepath.FromSlash("content/blog"))
                c.Assert(err, qt.IsNil)
       -
                c.Assert(len(dirs), qt.Equals, 4)
       +        for _, dir := range dirs {
       +                f, err := dir.Meta().Open()
       +                c.Assert(err, qt.IsNil)
       +                f.Close()
       +        }
       +
       +        blog, err := rfs.Open(filepath.FromSlash("content/blog"))
       +        c.Assert(err, qt.IsNil)
       +        fis, err := blog.Readdir(-1)
       +        for _, fi := range fis {
       +                f, err := fi.(FileMetaInfo).Meta().Open()
       +                c.Assert(err, qt.IsNil)
       +                f.Close()
       +        }
       +        blog.Close()
        
                getDirnames := func(name string, rfs *RootMappingFs) []string {
       +                c.Helper()
                        filename := filepath.FromSlash(name)
                        f, err := rfs.Open(filename)
                        c.Assert(err, qt.IsNil)
       @@ -109,16 +125,16 @@ func TestLanguageRootMapping(t *testing.T) {
                        return rm.Meta.Lang() == "en"
                })
        
       -        c.Assert(getDirnames("content/blog", rfsEn), qt.DeepEquals, []string{"en-f.txt", "en-f2.txt"})
       +        c.Assert(getDirnames("content/blog", rfsEn), qt.DeepEquals, []string{"d1", "en-f.txt", "en-f2.txt"})
        
                rfsSv := rfs.Filter(func(rm RootMapping) bool {
                        return rm.Meta.Lang() == "sv"
                })
        
       -        c.Assert(getDirnames("content/blog", rfsSv), qt.DeepEquals, []string{"sv-f.txt", "svdir"})
       +        c.Assert(getDirnames("content/blog", rfsSv), qt.DeepEquals, []string{"d1", "sv-f.txt", "svdir"})
        
                // Make sure we have not messed with the original
       -        c.Assert(getDirnames("content/blog", rfs), qt.DeepEquals, []string{"sv-f.txt", "en-f.txt", "svdir", "en-f2.txt"})
       +        c.Assert(getDirnames("content/blog", rfs), qt.DeepEquals, []string{"d1", "sv-f.txt", "en-f.txt", "svdir", "en-f2.txt"})
        
                c.Assert(getDirnames("content", rfsSv), qt.DeepEquals, []string{"blog", "docs"})
                c.Assert(getDirnames("content", rfs), qt.DeepEquals, []string{"blog", "docs"})
       @@ -135,7 +151,7 @@ func TestRootMappingFsDirnames(t *testing.T) {
                c.Assert(fs.Mkdir("f3t", 0755), qt.IsNil)
                c.Assert(afero.WriteFile(fs, filepath.Join("f2t", testfile), []byte("some content"), 0755), qt.IsNil)
        
       -        rfs, err := NewRootMappingFsFromFromTo(fs, "static/bf1", "f1t", "static/cf2", "f2t", "static/af3", "f3t")
       +        rfs, err := newRootMappingFsFromFromTo("", fs, "static/bf1", "f1t", "static/cf2", "f2t", "static/af3", "f3t")
                c.Assert(err, qt.IsNil)
        
                fif, err := rfs.Stat(filepath.Join("static/cf2", testfile))
       @@ -144,12 +160,12 @@ func TestRootMappingFsDirnames(t *testing.T) {
                fifm := fif.(FileMetaInfo).Meta()
                c.Assert(fifm.Filename(), qt.Equals, filepath.FromSlash("f2t/myfile.txt"))
        
       -        root, err := rfs.Open(filepathSeparator)
       +        root, err := rfs.Open("static")
                c.Assert(err, qt.IsNil)
        
                dirnames, err := root.Readdirnames(-1)
                c.Assert(err, qt.IsNil)
       -        c.Assert(dirnames, qt.DeepEquals, []string{"bf1", "cf2", "af3"})
       +        c.Assert(dirnames, qt.DeepEquals, []string{"af3", "bf1", "cf2"})
        
        }
        
       @@ -165,7 +181,7 @@ func TestRootMappingFsFilename(t *testing.T) {
                c.Assert(fs.MkdirAll(filepath.Join(workDir, "f1t/foo"), 0777), qt.IsNil)
                c.Assert(afero.WriteFile(fs, testfilename, []byte("content"), 0666), qt.IsNil)
        
       -        rfs, err := NewRootMappingFsFromFromTo(fs, "static/f1", filepath.Join(workDir, "f1t"), "static/f2", filepath.Join(workDir, "f2t"))
       +        rfs, err := newRootMappingFsFromFromTo(workDir, fs, "static/f1", filepath.Join(workDir, "f1t"), "static/f2", filepath.Join(workDir, "f2t"))
                c.Assert(err, qt.IsNil)
        
                fi, err := rfs.Stat(filepath.FromSlash("static/f1/foo/file.txt"))
       @@ -256,12 +272,9 @@ func TestRootMappingFsMount(t *testing.T) {
                c.Assert(err, qt.IsNil)
                c.Assert(string(b), qt.Equals, "some no content")
        
       -        // Check file mappings
       -        single, err := rfs.Stat(filepath.FromSlash("content/singles/p1.md"))
       -        c.Assert(err, qt.IsNil)
       -        c.Assert(single.IsDir(), qt.Equals, false)
       -        singlem := single.(FileMetaInfo).Meta()
       -        c.Assert(singlem.Lang(), qt.Equals, "no") // First match
       +        // Ambigous
       +        _, err = rfs.Stat(filepath.FromSlash("content/singles/p1.md"))
       +        c.Assert(err, qt.Not(qt.IsNil))
        
                singlesDir, err := rfs.Open(filepath.FromSlash("content/singles"))
                c.Assert(err, qt.IsNil)
       @@ -308,19 +321,20 @@ func TestRootMappingFsMountOverlap(t *testing.T) {
                rfs, err := NewRootMappingFs(fs, rm...)
                c.Assert(err, qt.IsNil)
        
       -        getDirnames := func(name string) []string {
       +        checkDirnames := func(name string, expect []string) {
       +                c.Helper()
                        name = filepath.FromSlash(name)
                        f, err := rfs.Open(name)
                        c.Assert(err, qt.IsNil)
                        defer f.Close()
                        names, err := f.Readdirnames(-1)
                        c.Assert(err, qt.IsNil)
       -                return names
       +                c.Assert(names, qt.DeepEquals, expect, qt.Commentf(fmt.Sprintf("%#v", names)))
                }
        
       -        c.Assert(getDirnames("static"), qt.DeepEquals, []string{"a.txt", "b", "e"})
       -        c.Assert(getDirnames("static/b"), qt.DeepEquals, []string{"b.txt", "c"})
       -        c.Assert(getDirnames("static/b/c"), qt.DeepEquals, []string{"c.txt"})
       +        checkDirnames("static", []string{"a.txt", "b", "e"})
       +        checkDirnames("static/b", []string{"b.txt", "c"})
       +        checkDirnames("static/b/c", []string{"c.txt"})
        
                fi, err := rfs.Stat(filepath.FromSlash("static/b/b.txt"))
                c.Assert(err, qt.IsNil)
       @@ -330,32 +344,96 @@ func TestRootMappingFsMountOverlap(t *testing.T) {
        
        func TestRootMappingFsOs(t *testing.T) {
                c := qt.New(t)
       -        fs := afero.NewOsFs()
       +        fs := NewBaseFileDecorator(afero.NewOsFs())
        
       -        d, err := ioutil.TempDir("", "hugo-root-mapping")
       +        d, clean, err := htesting.CreateTempDir(fs, "hugo-root-mapping-os")
                c.Assert(err, qt.IsNil)
       -        defer func() {
       -                os.RemoveAll(d)
       -        }()
       +        defer clean()
        
                testfile := "myfile.txt"
                c.Assert(fs.Mkdir(filepath.Join(d, "f1t"), 0755), qt.IsNil)
                c.Assert(fs.Mkdir(filepath.Join(d, "f2t"), 0755), qt.IsNil)
                c.Assert(fs.Mkdir(filepath.Join(d, "f3t"), 0755), qt.IsNil)
       +
       +        // Deep structure
       +        deepDir := filepath.Join(d, "d1", "d2", "d3", "d4", "d5")
       +        c.Assert(fs.MkdirAll(deepDir, 0755), qt.IsNil)
       +        for i := 1; i <= 3; i++ {
       +                c.Assert(fs.MkdirAll(filepath.Join(d, "d1", "d2", "d3", "d4", fmt.Sprintf("d4-%d", i)), 0755), qt.IsNil)
       +                c.Assert(afero.WriteFile(fs, filepath.Join(d, "d1", "d2", "d3", fmt.Sprintf("f-%d.txt", i)), []byte("some content"), 0755), qt.IsNil)
       +        }
       +
                c.Assert(afero.WriteFile(fs, filepath.Join(d, "f2t", testfile), []byte("some content"), 0755), qt.IsNil)
        
       -        rfs, err := NewRootMappingFsFromFromTo(fs, "static/bf1", filepath.Join(d, "f1t"), "static/cf2", filepath.Join(d, "f2t"), "static/af3", filepath.Join(d, "f3t"))
       +        rfs, err := newRootMappingFsFromFromTo(
       +                d,
       +                fs,
       +                "static/bf1", filepath.Join(d, "f1t"),
       +                "static/cf2", filepath.Join(d, "f2t"),
       +                "static/af3", filepath.Join(d, "f3t"),
       +                "static/a/b/c", filepath.Join(d, "d1", "d2", "d3"),
       +                "layouts", filepath.Join(d, "d1"),
       +        )
       +
                c.Assert(err, qt.IsNil)
        
                fif, err := rfs.Stat(filepath.Join("static/cf2", testfile))
                c.Assert(err, qt.IsNil)
                c.Assert(fif.Name(), qt.Equals, "myfile.txt")
        
       -        root, err := rfs.Open(filepathSeparator)
       +        root, err := rfs.Open("static")
                c.Assert(err, qt.IsNil)
        
                dirnames, err := root.Readdirnames(-1)
                c.Assert(err, qt.IsNil)
       -        c.Assert(dirnames, qt.DeepEquals, []string{"bf1", "cf2", "af3"})
       +        c.Assert(dirnames, qt.DeepEquals, []string{"a", "af3", "bf1", "cf2"}, qt.Commentf(fmt.Sprintf("%#v", dirnames)))
        
       +        getDirnames := func(dirname string) []string {
       +                dirname = filepath.FromSlash(dirname)
       +                f, err := rfs.Open(dirname)
       +                c.Assert(err, qt.IsNil)
       +                defer f.Close()
       +                dirnames, err := f.Readdirnames(-1)
       +                c.Assert(err, qt.IsNil)
       +                sort.Strings(dirnames)
       +                return dirnames
       +        }
       +
       +        c.Assert(getDirnames("static/a/b"), qt.DeepEquals, []string{"c"})
       +        c.Assert(getDirnames("static/a/b/c"), qt.DeepEquals, []string{"d4", "f-1.txt", "f-2.txt", "f-3.txt"})
       +        c.Assert(getDirnames("static/a/b/c/d4"), qt.DeepEquals, []string{"d4-1", "d4-2", "d4-3", "d5"})
       +
       +        all, err := collectFilenames(rfs, "static", "static")
       +        c.Assert(err, qt.IsNil)
       +
       +        c.Assert(all, qt.DeepEquals, []string{"a/b/c/f-1.txt", "a/b/c/f-2.txt", "a/b/c/f-3.txt", "cf2/myfile.txt"})
       +
       +        fis, err := collectFileinfos(rfs, "static", "static")
       +        c.Assert(err, qt.IsNil)
       +
       +        c.Assert(fis[9].Meta().PathFile(), qt.Equals, filepath.FromSlash("d1/d2/d3/f-1.txt"))
       +
       +        dirc := fis[3].Meta()
       +
       +        f, err := dirc.Open()
       +        c.Assert(err, qt.IsNil)
       +        defer f.Close()
       +        fileInfos, err := f.Readdir(-1)
       +        c.Assert(err, qt.IsNil)
       +        sortFileInfos(fileInfos)
       +        i := 0
       +        for _, fi := range fileInfos {
       +                if fi.IsDir() {
       +                        continue
       +                }
       +                i++
       +                meta := fi.(FileMetaInfo).Meta()
       +                c.Assert(meta.Filename(), qt.Equals, filepath.Join(d, fmt.Sprintf("/d1/d2/d3/f-%d.txt", i)))
       +                c.Assert(meta.PathFile(), qt.Equals, filepath.FromSlash(fmt.Sprintf("d1/d2/d3/f-%d.txt", i)))
       +        }
       +
       +        _, err = rfs.Stat(filepath.FromSlash("layouts/d2/d3/f-1.txt"))
       +        c.Assert(err, qt.IsNil)
       +        _, err = rfs.Stat(filepath.FromSlash("layouts/d2/d3"))
       +        c.Assert(err, qt.IsNil)
        }
 (DIR) diff --git a/hugofs/walk.go b/hugofs/walk.go
       @@ -124,7 +124,6 @@ func (w *Walkway) Walk() error {
                                if w.checkErr(w.root, err) {
                                        return nil
                                }
       -
                                return w.walkFn(w.root, nil, errors.Wrapf(err, "walk: %q", w.root))
                        }
                        fi = info.(FileMetaInfo)
       @@ -154,6 +153,15 @@ func (w *Walkway) checkErr(filename string, err error) bool {
                        logUnsupportedSymlink(filename, w.logger)
                        return true
                }
       +
       +        if os.IsNotExist(err) {
       +                // The file may be removed in process.
       +                // This may be a ERROR situation, but it is not possible
       +                // to determine as a general case.
       +                w.logger.WARN.Printf("File %q not found, skipping.", filename)
       +                return true
       +        }
       +
                return false
        }
        
 (DIR) diff --git a/hugofs/walk_test.go b/hugofs/walk_test.go
       @@ -176,6 +176,27 @@ func collectFilenames(fs afero.Fs, base, root string) ([]string, error) {
        
        }
        
       +func collectFileinfos(fs afero.Fs, base, root string) ([]FileMetaInfo, error) {
       +        var fis []FileMetaInfo
       +
       +        walkFn := func(path string, info FileMetaInfo, err error) error {
       +                if err != nil {
       +                        return err
       +                }
       +
       +                fis = append(fis, info)
       +
       +                return nil
       +        }
       +
       +        w := NewWalkway(WalkwayConfig{Fs: fs, BasePath: base, Root: root, WalkFn: walkFn})
       +
       +        err := w.Walk()
       +
       +        return fis, err
       +
       +}
       +
        func BenchmarkWalk(b *testing.B) {
                c := qt.New(b)
                fs := NewBaseFileDecorator(afero.NewMemMapFs())
 (DIR) diff --git a/hugolib/filesystems/basefs.go b/hugolib/filesystems/basefs.go
       @@ -258,6 +258,7 @@ func (s SourceFilesystems) MakeStaticPathRelative(filename string) string {
        // MakePathRelative creates a relative path from the given filename.
        // It will return an empty string if the filename is not a member of this filesystem.
        func (d *SourceFilesystem) MakePathRelative(filename string) string {
       +
                for _, dir := range d.Dirs {
                        meta := dir.(hugofs.FileMetaInfo).Meta()
                        currentPath := meta.Filename()
 (DIR) diff --git a/hugolib/filesystems/basefs_test.go b/hugolib/filesystems/basefs_test.go
       @@ -173,9 +173,7 @@ theme = ["atheme"]
                                filename = filepath.FromSlash(filename)
                                f, err := fs.Open(filename)
                                c.Assert(err, qt.IsNil)
       -                        name := f.Name()
                                f.Close()
       -                        c.Assert(name, qt.Equals, filename)
                        }
                }
        }
 (DIR) diff --git a/hugolib/hugo_modules_test.go b/hugolib/hugo_modules_test.go
       @@ -38,6 +38,47 @@ import (
                "github.com/spf13/viper"
        )
        
       +// https://github.com/gohugoio/hugo/issues/6730
       +func TestHugoModulesTargetInSubFolder(t *testing.T) {
       +        config := `
       +baseURL="https://example.org"
       +workingDir = %q
       +
       +[module]
       +[[module.imports]]
       +path="github.com/gohugoio/hugoTestModule2"
       +  [[module.imports.mounts]]
       +    source = "templates/hooks"
       +    target = "layouts/_default/_markup"
       +    
       +`
       +
       +        b := newTestSitesBuilder(t)
       +        workingDir, clean, err := htesting.CreateTempDir(hugofs.Os, "hugo-modules-target-in-subfolder-test")
       +        b.Assert(err, qt.IsNil)
       +        defer clean()
       +        b.Fs = hugofs.NewDefault(viper.New())
       +        b.WithWorkingDir(workingDir).WithConfigFile("toml", fmt.Sprintf(config, workingDir))
       +        b.WithTemplates("_default/single.html", `{{ .Content }}`)
       +        b.WithContent("p1.md", `---
       +title: "Page"
       +---
       +
       +[A link](https://bep.is)
       +
       +`)
       +        b.WithSourceFile("go.mod", `
       +module github.com/gohugoio/tests/testHugoModules
       +
       +
       +`)
       +
       +        b.Build(BuildCfg{})
       +
       +        b.AssertFileContent("public/p1/index.html", `<p>Page|https://bep.is|Title: |Text: A link|END</p>`)
       +
       +}
       +
        // TODO(bep) this fails when testmodBuilder is also building ...
        func TestHugoModules(t *testing.T) {
                if !isCI() {
       @@ -588,6 +629,9 @@ workingDir = %q
        
        {{ $mypage := .Site.GetPage "/blog/mypage.md" }}
        {{ with $mypage }}MYPAGE: {{ .Title }}|Path: {{ path.Join .File.Path }}|FilePath: {{ path.Join .File.FileInfo.Meta.PathFile }}|{{ end }}
       +{{ $mybundle := .Site.GetPage "/blog/mybundle" }}
       +{{ with $mybundle }}MYBUNDLE: {{ .Title }}|Path: {{ path.Join .File.Path }}|FilePath: {{ path.Join .File.FileInfo.Meta.PathFile }}|{{ end }}
       +
        
        `, "_default/_markup/render-link.html", `
        {{ $link := .Destination }}
       @@ -640,6 +684,7 @@ README: Readme Title
        /README.md|Path: _index.md|FilePath: README.md
        Readme Content.
        MYPAGE: My Page|Path: blog/mypage.md|FilePath: mycontent/mypage.md|
       +MYBUNDLE: My Bundle|Path: blog/mybundle/index.md|FilePath: mycontent/mybundle/index.md|
        `)
                b.AssertFileContent("public/blog/mypage/index.html", `
        <a href="https://example.com/blog/mybundle/">Relative Link From Page</a>