mirror of
https://github.com/gohugoio/hugo.git
synced 2024-11-14 20:37:55 -05:00
144 lines
3.5 KiB
Go
144 lines
3.5 KiB
Go
// Copyright 2017 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 os provides template functions for interacting with the operating
|
|
// system.
|
|
package os
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
_os "os"
|
|
|
|
"github.com/gohugoio/hugo/deps"
|
|
"github.com/spf13/afero"
|
|
"github.com/spf13/cast"
|
|
)
|
|
|
|
// New returns a new instance of the os-namespaced template functions.
|
|
func New(d *deps.Deps) *Namespace {
|
|
var rfs afero.Fs
|
|
if d.Fs != nil {
|
|
rfs = d.Fs.WorkingDir
|
|
if d.PathSpec != nil && d.PathSpec.BaseFs != nil {
|
|
rfs = afero.NewReadOnlyFs(afero.NewCopyOnWriteFs(d.PathSpec.BaseFs.Content.Fs, d.Fs.WorkingDir))
|
|
}
|
|
|
|
}
|
|
|
|
return &Namespace{
|
|
readFileFs: rfs,
|
|
deps: d,
|
|
}
|
|
}
|
|
|
|
// Namespace provides template functions for the "os" namespace.
|
|
type Namespace struct {
|
|
readFileFs afero.Fs
|
|
deps *deps.Deps
|
|
}
|
|
|
|
// Getenv retrieves the value of the environment variable named by the key.
|
|
// It returns the value, which will be empty if the variable is not present.
|
|
func (ns *Namespace) Getenv(key interface{}) (string, error) {
|
|
skey, err := cast.ToStringE(key)
|
|
if err != nil {
|
|
return "", nil
|
|
}
|
|
|
|
return _os.Getenv(skey), nil
|
|
}
|
|
|
|
// readFile reads the file named by filename in the given filesystem
|
|
// and returns the contents as a string.
|
|
func readFile(fs afero.Fs, filename string) (string, error) {
|
|
if filename == "" {
|
|
return "", errors.New("readFile needs a filename")
|
|
}
|
|
|
|
b, err := afero.ReadFile(fs, filename)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
return string(b), nil
|
|
}
|
|
|
|
// ReadFile reads the file named by filename relative to the configured WorkingDir.
|
|
// It returns the contents as a string.
|
|
// There is an upper size limit set at 1 megabytes.
|
|
func (ns *Namespace) ReadFile(i interface{}) (string, error) {
|
|
s, err := cast.ToStringE(i)
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
if ns.deps.PathSpec != nil {
|
|
s = ns.deps.PathSpec.RelPathify(s)
|
|
}
|
|
|
|
return readFile(ns.readFileFs, s)
|
|
}
|
|
|
|
// ReadDir lists the directory contents relative to the configured WorkingDir.
|
|
func (ns *Namespace) ReadDir(i interface{}) ([]_os.FileInfo, error) {
|
|
path, err := cast.ToStringE(i)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
list, err := afero.ReadDir(ns.deps.Fs.WorkingDir, path)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to read directory %q: %s", path, err)
|
|
}
|
|
|
|
return list, nil
|
|
}
|
|
|
|
// FileExists checks whether a file exists under the given path.
|
|
func (ns *Namespace) FileExists(i interface{}) (bool, error) {
|
|
path, err := cast.ToStringE(i)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
|
|
if path == "" {
|
|
return false, errors.New("fileExists needs a path to a file")
|
|
}
|
|
|
|
status, err := afero.Exists(ns.readFileFs, path)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
|
|
return status, nil
|
|
}
|
|
|
|
// Stat returns the os.FileInfo structure describing file.
|
|
func (ns *Namespace) Stat(i interface{}) (_os.FileInfo, error) {
|
|
path, err := cast.ToStringE(i)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
if path == "" {
|
|
return nil, errors.New("fileStat needs a path to a file")
|
|
}
|
|
|
|
r, err := ns.readFileFs.Stat(path)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return r, nil
|
|
}
|