403 lines
9 KiB
Go
403 lines
9 KiB
Go
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package fs
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import (
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"crypto/md5"
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"encoding/hex"
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"fmt"
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"io"
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"io/fs"
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"os"
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"path/filepath"
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"runtime"
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"strings"
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"unsafe"
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"github.com/leaanthony/slicer"
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)
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// RelativeToCwd returns an absolute path based on the cwd
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// and the given relative path
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func RelativeToCwd(relativePath string) (string, error) {
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cwd, err := os.Getwd()
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if err != nil {
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return "", err
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}
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return filepath.Join(cwd, relativePath), nil
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}
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// Mkdir will create the given directory
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func Mkdir(dirname string) error {
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return os.Mkdir(dirname, 0o755)
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}
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// MkDirs creates the given nested directories.
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// Returns error on failure
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func MkDirs(fullPath string, mode ...os.FileMode) error {
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var perms os.FileMode
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perms = 0o755
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if len(mode) == 1 {
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perms = mode[0]
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}
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return os.MkdirAll(fullPath, perms)
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}
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// MoveFile attempts to move the source file to the target
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// Target is a fully qualified path to a file *name*, not a
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// directory
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func MoveFile(source string, target string) error {
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return os.Rename(source, target)
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}
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// DeleteFile will delete the given file
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func DeleteFile(filename string) error {
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return os.Remove(filename)
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}
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// CopyFile from source to target
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func CopyFile(source string, target string) error {
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s, err := os.Open(source)
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if err != nil {
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return err
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}
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defer s.Close()
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d, err := os.Create(target)
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if err != nil {
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return err
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}
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if _, err := io.Copy(d, s); err != nil {
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d.Close()
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return err
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}
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return d.Close()
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}
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// DirExists - Returns true if the given path resolves to a directory on the filesystem
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func DirExists(path string) bool {
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fi, err := os.Lstat(path)
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if err != nil {
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return false
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}
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return fi.Mode().IsDir()
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}
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// FileExists returns a boolean value indicating whether
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// the given file exists
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func FileExists(path string) bool {
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fi, err := os.Lstat(path)
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if err != nil {
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return false
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}
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return fi.Mode().IsRegular()
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}
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// RelativePath returns a qualified path created by joining the
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// directory of the calling file and the given relative path.
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//
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// Example: RelativePath("..") in *this* file would give you '/path/to/wails2/v2/internal`
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func RelativePath(relativepath string, optionalpaths ...string) string {
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_, thisFile, _, _ := runtime.Caller(1)
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localDir := filepath.Dir(thisFile)
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// If we have optional paths, join them to the relativepath
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if len(optionalpaths) > 0 {
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paths := []string{relativepath}
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paths = append(paths, optionalpaths...)
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relativepath = filepath.Join(paths...)
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}
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result, err := filepath.Abs(filepath.Join(localDir, relativepath))
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if err != nil {
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// I'm allowing this for 1 reason only: It's fatal if the path
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// supplied is wrong as it's only used internally in Wails. If we get
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// that path wrong, we should know about it immediately. The other reason is
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// that it cuts down a ton of unnecessary error handling.
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panic(err)
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}
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return result
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}
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// MustLoadString attempts to load a string and will abort with a fatal message if
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// something goes wrong
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func MustLoadString(filename string) string {
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data, err := os.ReadFile(filename)
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if err != nil {
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fmt.Printf("FATAL: Unable to load file '%s': %s\n", filename, err.Error())
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os.Exit(1)
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}
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return *(*string)(unsafe.Pointer(&data))
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}
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// MD5File returns the md5sum of the given file
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func MD5File(filename string) (string, error) {
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f, err := os.Open(filename)
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if err != nil {
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return "", err
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}
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defer f.Close()
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h := md5.New()
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if _, err := io.Copy(h, f); err != nil {
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return "", err
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}
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return hex.EncodeToString(h.Sum(nil)), nil
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}
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// MustMD5File will call MD5File and abort the program on error
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func MustMD5File(filename string) string {
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result, err := MD5File(filename)
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if err != nil {
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println("FATAL: Unable to MD5Sum file:", err.Error())
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os.Exit(1)
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}
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return result
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}
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// MustWriteString will attempt to write the given data to the given filename
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// It will abort the program in the event of a failure
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func MustWriteString(filename string, data string) {
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err := os.WriteFile(filename, []byte(data), 0o755)
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if err != nil {
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fatal("Unable to write file", filename, ":", err.Error())
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os.Exit(1)
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}
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}
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// fatal will print the optional messages and die
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func fatal(message ...string) {
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if len(message) > 0 {
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print("FATAL:")
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for text := range message {
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print(text)
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}
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}
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os.Exit(1)
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}
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// GetSubdirectories returns a list of subdirectories for the given root directory
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func GetSubdirectories(rootDir string) (*slicer.StringSlicer, error) {
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var result slicer.StringSlicer
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// Iterate root dir
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err := filepath.Walk(rootDir, func(path string, info os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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// If we have a directory, save it
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if info.IsDir() {
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result.Add(path)
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}
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return nil
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})
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return &result, err
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}
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func DirIsEmpty(dir string) (bool, error) {
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// CREDIT: https://stackoverflow.com/a/30708914/8325411
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f, err := os.Open(dir)
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if err != nil {
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return false, err
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}
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defer f.Close()
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_, err = f.Readdirnames(1) // Or f.Readdir(1)
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if err == io.EOF {
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return true, nil
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}
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return false, err // Either not empty or error, suits both cases
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}
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// CopyDir recursively copies a directory tree, attempting to preserve permissions.
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// Source directory must exist, destination directory must *not* exist.
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// Symlinks are ignored and skipped.
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// Credit: https://gist.github.com/r0l1/92462b38df26839a3ca324697c8cba04
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func CopyDir(src string, dst string) (err error) {
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src = filepath.Clean(src)
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dst = filepath.Clean(dst)
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si, err := os.Stat(src)
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if err != nil {
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return err
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}
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if !si.IsDir() {
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return fmt.Errorf("source is not a directory")
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}
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_, err = os.Stat(dst)
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if err != nil && !os.IsNotExist(err) {
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return
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}
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if err == nil {
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return fmt.Errorf("destination already exists")
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}
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err = MkDirs(dst)
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if err != nil {
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return
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}
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entries, err := os.ReadDir(src)
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if err != nil {
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return
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}
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for _, entry := range entries {
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srcPath := filepath.Join(src, entry.Name())
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dstPath := filepath.Join(dst, entry.Name())
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if entry.IsDir() {
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err = CopyDir(srcPath, dstPath)
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if err != nil {
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return
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}
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} else {
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// Skip symlinks.
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if entry.Type()&os.ModeSymlink != 0 {
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continue
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}
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err = CopyFile(srcPath, dstPath)
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if err != nil {
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return
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}
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}
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}
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return
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}
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// SetPermissions recursively sets file permissions on a directory
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func SetPermissions(dir string, perm os.FileMode) error {
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return filepath.Walk(dir, func(path string, info os.FileInfo, err error) error {
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if err != nil {
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return err
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}
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return os.Chmod(path, perm)
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})
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}
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// CopyDirExtended recursively copies a directory tree, attempting to preserve permissions.
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// Source directory must exist, destination directory must *not* exist. It ignores any files or
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// directories that are given through the ignore parameter.
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// Symlinks are ignored and skipped.
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// Credit: https://gist.github.com/r0l1/92462b38df26839a3ca324697c8cba04
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func CopyDirExtended(src string, dst string, ignore []string) (err error) {
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ignoreList := slicer.String(ignore)
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src = filepath.Clean(src)
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dst = filepath.Clean(dst)
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si, err := os.Stat(src)
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if err != nil {
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return err
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}
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if !si.IsDir() {
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return fmt.Errorf("source is not a directory")
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}
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_, err = os.Stat(dst)
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if err != nil && !os.IsNotExist(err) {
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return
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}
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if err == nil {
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return fmt.Errorf("destination already exists")
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}
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err = MkDirs(dst)
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if err != nil {
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return
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}
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entries, err := os.ReadDir(src)
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if err != nil {
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return
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}
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for _, entry := range entries {
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if ignoreList.Contains(entry.Name()) {
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continue
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}
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srcPath := filepath.Join(src, entry.Name())
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dstPath := filepath.Join(dst, entry.Name())
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if entry.IsDir() {
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err = CopyDir(srcPath, dstPath)
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if err != nil {
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return
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}
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} else {
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// Skip symlinks.
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if entry.Type()&os.ModeSymlink != 0 {
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continue
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}
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err = CopyFile(srcPath, dstPath)
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if err != nil {
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return
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}
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}
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}
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return
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}
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func FindPathToFile(fsys fs.FS, file string) (string, error) {
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stat, _ := fs.Stat(fsys, file)
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if stat != nil {
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return ".", nil
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}
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var indexFiles slicer.StringSlicer
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err := fs.WalkDir(fsys, ".", func(path string, d fs.DirEntry, err error) error {
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if err != nil {
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return err
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}
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if strings.HasSuffix(path, file) {
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indexFiles.Add(path)
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}
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return nil
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})
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if err != nil {
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return "", err
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}
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if indexFiles.Length() > 1 {
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selected := indexFiles.AsSlice()[0]
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for _, f := range indexFiles.AsSlice() {
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if len(f) < len(selected) {
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selected = f
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}
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}
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path, _ := filepath.Split(selected)
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return path, nil
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}
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if indexFiles.Length() > 0 {
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path, _ := filepath.Split(indexFiles.AsSlice()[0])
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return path, nil
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}
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return "", fmt.Errorf("%s: %w", file, os.ErrNotExist)
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}
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// FindFileInParents searches for a file in the current directory and all parent directories.
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// Returns the absolute path to the file if found, otherwise an empty string
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func FindFileInParents(path string, filename string) string {
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// Check for bad paths
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if _, err := os.Stat(path); err != nil {
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return ""
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}
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var pathToFile string
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for {
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pathToFile = filepath.Join(path, filename)
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if _, err := os.Stat(pathToFile); err == nil {
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break
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}
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parent := filepath.Dir(path)
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if parent == path {
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return ""
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}
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path = parent
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}
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return pathToFile
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}
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