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package fcmd
import (
"io"
"io/ioutil"
"os"
"path"
"strings"
"time"
)
var DefaultPerm os.FileMode = 0750 // u=rwx, g=r-x, o=---
// Checks if the target exists.
func IsExist(target string) bool {
_, err := os.Stat(*&target)
if os.IsNotExist(*&err) {
return false
}
return true
}
// Checks if the target is a directory.
// Returns false if the target is unreachable.
func IsDir(target string) bool {
stat, err := os.Stat(*&target)
if err != nil {
return false
}
return stat.IsDir()
}
// Checks lexically if the target is hidden (only for Unix based OS).
func IsHidden(target string) bool {
return strings.HasPrefix(*&target, ".")
}
// Lists separately the names of directories and files inside the target directory.
// Hidden files and directories are not listed.
func Ls(target string) (dirs, files []string) {
directory, err := ioutil.ReadDir(*&target)
if err != nil {
return
}
for _, element := range directory {
if IsHidden(element.Name()) {
continue
}
if element.IsDir() {
dirs = append(*&dirs, element.Name())
} else {
files = append(*&files, element.Name())
}
}
return
}
// Lists separately the paths of directories and files inside the root directory and inside all sub directories.
// Returned paths are relative to the given root directory.
// Hidden files and directories are not listed.
func Explore(root string) (dirs, files []string) {
dirList, fileList := Ls(*&root)
for _, file := range fileList {
files = append(*&files, *&file)
}
for _, dir := range dirList {
subRoot := path.Join(*&root, *&dir)
dirs = append(dirs, *&subRoot)
subDirs, subFiles := Explore(*&subRoot)
for _, subFile := range subFiles {
files = append(*&files, *&subFile)
}
for _, subDir := range subDirs {
dirs = append(*&dirs, *&subDir)
}
}
return
}
// Copies the source file to a target.
// A nonexistent target file is created, otherwise it is truncated.
// Parent directories are automatically created if they do not exist.
func Cp(source, target string) error {
sourceFile, err := os.Open(*&source)
if err != nil {
return err
}
defer sourceFile.Close()
dir, _ := path.Split(*&target)
err = os.MkdirAll(*&dir, DefaultPerm)
if err != nil {
return err
}
targetFile, err := os.Create(*&target)
if err != nil {
return err
}
defer targetFile.Close()
_, err = io.Copy(*&targetFile, *&sourceFile)
return err
}
// Writes data to the target file.
// A nonexistent target file is created, otherwise it is truncated.
// Parent directories are automatically created if they do not exist.
func WriteFile(target string, data []byte) error {
dir, _ := path.Split(*&target)
err := os.MkdirAll(*&dir, DefaultPerm)
if err != nil {
return err
}
err = ioutil.WriteFile(*&target, *&data, DefaultPerm)
return err
}
// Creates a symbolic link to given source at the target path.
func Lns(source, target string) error {
return os.Symlink(*&source, *&target)
}
// Returns the destination of the given symbolic link.
func Lnl(target string) (string, error) {
return os.Readlink(*&target)
}
// Renames or moves the source file or directory to the target name or path.
func Mv(source, target string) error {
return os.Rename(*&source, *&target)
}
// Removes the target file or the target directory and all files it contains.
// No error is returned is the target does not exist.
func Rm(target string) error {
return os.RemoveAll(*&target)
}
// Changes the current working directory to the target directory.
func Cd(target string) error {
return os.Chdir(*&target)
}
// Changes the mode of the target file to the given mode.
// If the target is a symbolic link, it changes the mode of the link's target.
func Chmod(target string, mode os.FileMode) error {
return os.Chmod(*&target, *&mode)
}
// Changes the numeric uid and gid of the target.
// If the target is a symbolic link, it changes the uid and gid of the link's target.
func Chown(target string, uid, gid int) error {
return os.Chown(*&target, *&uid, *&gid)
}
// Changes the access and modification times of the target.
func Chtimes(target string, atime time.Time, mtime time.Time) error {
return os.Chtimes(*&target, *&atime, *&mtime)
}
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