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// 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 hugofs provides the file systems used by Hugo.
package hugofs
import (
"os"
"github.com/gohugoio/hugo/config"
"github.com/spf13/afero"
)
var (
// Os points to the (real) Os filesystem.
Os = &afero.OsFs{}
)
// Fs abstracts the file system to separate source and destination file systems
// and allows both to be mocked for testing.
type Fs struct {
// Source is Hugo's source file system.
Source afero.Fs
// Destination is Hugo's destination file system.
Destination afero.Fs
// Os is an OS file system.
// NOTE: Field is currently unused.
Os afero.Fs
// WorkingDir is a read-only file system
// restricted to the project working dir.
WorkingDir *afero.BasePathFs
}
// NewDefault creates a new Fs with the OS file system
// as source and destination file systems.
func NewDefault(cfg config.Provider) *Fs {
fs := &afero.OsFs{}
return newFs(fs, cfg)
}
// NewMem creates a new Fs with the MemMapFs
// as source and destination file systems.
// Useful for testing.
func NewMem(cfg config.Provider) *Fs {
fs := &afero.MemMapFs{}
return newFs(fs, cfg)
}
// NewFrom creates a new Fs based on the provided Afero Fs
// as source and destination file systems.
// Useful for testing.
func NewFrom(fs afero.Fs, cfg config.Provider) *Fs {
return newFs(fs, cfg)
}
func newFs(base afero.Fs, cfg config.Provider) *Fs {
return &Fs{
Source: base,
Destination: base,
Os: &afero.OsFs{},
WorkingDir: getWorkingDirFs(base, cfg),
}
}
func getWorkingDirFs(base afero.Fs, cfg config.Provider) *afero.BasePathFs {
workingDir := cfg.GetString("workingDir")
if workingDir != "" {
return afero.NewBasePathFs(afero.NewReadOnlyFs(base), workingDir).(*afero.BasePathFs)
}
return nil
}
func isWrite(flag int) bool {
return flag&os.O_RDWR != 0 || flag&os.O_WRONLY != 0
}
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