ref: 3d9235e8fcf31553c0c0f313d3264f12438749ea
dir: /source/fileInfo.go/
// Copyright 2019 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package source
import (
"path/filepath"
"strings"
"sync"
"github.com/gohugoio/hugo/hugofs/files"
"github.com/pkg/errors"
"github.com/gohugoio/hugo/common/hugio"
"github.com/gohugoio/hugo/hugofs"
"github.com/gohugoio/hugo/helpers"
)
// fileInfo implements the File interface.
var (
_ File = (*FileInfo)(nil)
)
// File represents a source file.
// This is a temporary construct until we resolve page.Page conflicts.
// TODO(bep) remove this construct once we have resolved page deprecations
type File interface {
fileOverlap
FileWithoutOverlap
}
// Temporary to solve duplicate/deprecated names in page.Page
type fileOverlap interface {
// Path gets the relative path including file name and extension.
// The directory is relative to the content root.
Path() string
// Section is first directory below the content root.
// For page bundles in root, the Section will be empty.
Section() string
// Lang is the language code for this page. It will be the
// same as the site's language code.
Lang() string
IsZero() bool
}
type FileWithoutOverlap interface {
// Filename gets the full path and filename to the file.
Filename() string
// Dir gets the name of the directory that contains this file.
// The directory is relative to the content root.
Dir() string
// Extension gets the file extension, i.e "myblogpost.md" will return "md".
Extension() string
// Ext is an alias for Extension.
Ext() string // Hmm... Deprecate Extension
// LogicalName is filename and extension of the file.
LogicalName() string
// BaseFileName is a filename without extension.
BaseFileName() string
// TranslationBaseName is a filename with no extension,
// not even the optional language extension part.
TranslationBaseName() string
// ContentBaseName is a either TranslationBaseName or name of containing folder
// if file is a leaf bundle.
ContentBaseName() string
// UniqueID is the MD5 hash of the file's path and is for most practical applications,
// Hugo content files being one of them, considered to be unique.
UniqueID() string
FileInfo() hugofs.FileMetaInfo
}
// FileInfo describes a source file.
type FileInfo struct {
// Absolute filename to the file on disk.
filename string
sp *SourceSpec
fi hugofs.FileMetaInfo
// Derived from filename
ext string // Extension without any "."
lang string
name string
dir string
relDir string
relPath string
baseName string
translationBaseName string
contentBaseName string
section string
isLeafBundle bool
uniqueID string
lazyInit sync.Once
}
// Filename returns a file's absolute path and filename on disk.
func (fi *FileInfo) Filename() string { return fi.filename }
// Path gets the relative path including file name and extension. The directory
// is relative to the content root.
func (fi *FileInfo) Path() string { return fi.relPath }
// Dir gets the name of the directory that contains this file. The directory is
// relative to the content root.
func (fi *FileInfo) Dir() string { return fi.relDir }
// Extension is an alias to Ext().
func (fi *FileInfo) Extension() string { return fi.Ext() }
// Ext returns a file's extension without the leading period (ie. "md").
func (fi *FileInfo) Ext() string { return fi.ext }
// Lang returns a file's language (ie. "sv").
func (fi *FileInfo) Lang() string { return fi.lang }
// LogicalName returns a file's name and extension (ie. "page.sv.md").
func (fi *FileInfo) LogicalName() string { return fi.name }
// BaseFileName returns a file's name without extension (ie. "page.sv").
func (fi *FileInfo) BaseFileName() string { return fi.baseName }
// TranslationBaseName returns a file's translation base name without the
// language segement (ie. "page").
func (fi *FileInfo) TranslationBaseName() string { return fi.translationBaseName }
// ContentBaseName is a either TranslationBaseName or name of containing folder
// if file is a leaf bundle.
func (fi *FileInfo) ContentBaseName() string {
fi.init()
return fi.contentBaseName
}
// Section returns a file's section.
func (fi *FileInfo) Section() string {
fi.init()
return fi.section
}
// UniqueID returns a file's unique, MD5 hash identifier.
func (fi *FileInfo) UniqueID() string {
fi.init()
return fi.uniqueID
}
// FileInfo returns a file's underlying os.FileInfo.
func (fi *FileInfo) FileInfo() hugofs.FileMetaInfo { return fi.fi }
func (fi *FileInfo) String() string { return fi.BaseFileName() }
// Open implements ReadableFile.
func (fi *FileInfo) Open() (hugio.ReadSeekCloser, error) {
f, err := fi.fi.Meta().Open()
return f, err
}
func (fi *FileInfo) IsZero() bool {
return fi == nil
}
// We create a lot of these FileInfo objects, but there are parts of it used only
// in some cases that is slightly expensive to construct.
func (fi *FileInfo) init() {
fi.lazyInit.Do(func() {
relDir := strings.Trim(fi.relDir, helpers.FilePathSeparator)
parts := strings.Split(relDir, helpers.FilePathSeparator)
var section string
if (!fi.isLeafBundle && len(parts) == 1) || len(parts) > 1 {
section = parts[0]
}
fi.section = section
if fi.isLeafBundle && len(parts) > 0 {
fi.contentBaseName = parts[len(parts)-1]
} else {
fi.contentBaseName = fi.translationBaseName
}
fi.uniqueID = helpers.MD5String(filepath.ToSlash(fi.relPath))
})
}
// NewTestFile creates a partially filled File used in unit tests.
// TODO(bep) improve this package
func NewTestFile(filename string) *FileInfo {
base := filepath.Base(filepath.Dir(filename))
return &FileInfo{
filename: filename,
translationBaseName: base,
}
}
func (sp *SourceSpec) NewFileInfoFrom(path, filename string) (*FileInfo, error) {
meta := hugofs.FileMeta{
"filename": filename,
"path": path,
}
return sp.NewFileInfo(hugofs.NewFileMetaInfo(nil, meta))
}
func (sp *SourceSpec) NewFileInfo(fi hugofs.FileMetaInfo) (*FileInfo, error) {
m := fi.Meta()
filename := m.Filename()
relPath := m.Path()
isLeafBundle := m.Classifier() == files.ContentClassLeaf
if relPath == "" {
return nil, errors.Errorf("no Path provided by %v (%T)", m, m.Fs())
}
if filename == "" {
return nil, errors.Errorf("no Filename provided by %v (%T)", m, m.Fs())
}
relDir := filepath.Dir(relPath)
if relDir == "." {
relDir = ""
}
if !strings.HasSuffix(relDir, helpers.FilePathSeparator) {
relDir = relDir + helpers.FilePathSeparator
}
lang := m.Lang()
translationBaseName := m.GetString("translationBaseName")
dir, name := filepath.Split(relPath)
if !strings.HasSuffix(dir, helpers.FilePathSeparator) {
dir = dir + helpers.FilePathSeparator
}
ext := strings.ToLower(strings.TrimPrefix(filepath.Ext(name), "."))
baseName := helpers.Filename(name)
if translationBaseName == "" {
// This is usyally provided by the filesystem. But this FileInfo is also
// created in a standalone context when doing "hugo new". This is
// an approximate implementation, which is "good enough" in that case.
fileLangExt := filepath.Ext(baseName)
translationBaseName = strings.TrimSuffix(baseName, fileLangExt)
}
f := &FileInfo{
sp: sp,
filename: filename,
fi: fi,
lang: lang,
ext: ext,
dir: dir,
relDir: relDir, // Dir()
relPath: relPath, // Path()
name: name,
baseName: baseName, // BaseFileName()
translationBaseName: translationBaseName,
isLeafBundle: isLeafBundle,
}
return f, nil
}