mirror of
https://github.com/gohugoio/hugo.git
synced 2024-11-21 20:46:30 -05:00
98 lines
2.6 KiB
Go
98 lines
2.6 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
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
_os "os"
|
|
|
|
"github.com/spf13/afero"
|
|
"github.com/spf13/cast"
|
|
"github.com/spf13/hugo/deps"
|
|
)
|
|
|
|
// New returns a new instance of the os-namespaced template functions.
|
|
func New(deps *deps.Deps) *Namespace {
|
|
return &Namespace{
|
|
deps: deps,
|
|
}
|
|
}
|
|
|
|
// Namespace provides template functions for the "os" namespace.
|
|
type Namespace struct {
|
|
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 relative to the given basepath
|
|
// and returns the contents as a string.
|
|
// There is a upper size limit set at 1 megabytes.
|
|
func readFile(fs *afero.BasePathFs, filename string) (string, error) {
|
|
if filename == "" {
|
|
return "", errors.New("readFile needs a filename")
|
|
}
|
|
|
|
if info, err := fs.Stat(filename); err == nil {
|
|
if info.Size() > 1000000 {
|
|
return "", fmt.Errorf("File %q is too big", filename)
|
|
}
|
|
} else {
|
|
return "", err
|
|
}
|
|
b, err := afero.ReadFile(fs, filename)
|
|
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
return string(b), nil
|
|
}
|
|
|
|
// ReadFilereads the file named by filename relative to the configured
|
|
// WorkingDir. It returns the contents as a string. There is a 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
|
|
}
|
|
|
|
return readFile(ns.deps.Fs.WorkingDir, 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 %s with error message %s", path, err)
|
|
}
|
|
|
|
return list, nil
|
|
}
|