151 lines
3.5 KiB
Go
151 lines
3.5 KiB
Go
/*
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* Copyright (c) 2015 Alex Yatskov <alex@foosoft.net>
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* Author: Alex Yatskov <alex@foosoft.net>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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package main
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import (
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"fmt"
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"log"
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"os"
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"path/filepath"
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"strings"
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)
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func appendExpEnv(dst, src []string) []string {
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for _, value := range src {
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dst = append(dst, os.ExpandEnv(value))
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}
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return dst
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}
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func makeAbsPath(path string) string {
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path, err := filepath.Abs(path)
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if err != nil {
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log.Fatal(err)
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}
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return path
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}
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func cleanPath(loc string, flags int) (bool, error) {
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if info, _ := os.Lstat(loc); info != nil {
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if info.Mode()&os.ModeSymlink == 0 {
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shouldContinue := false
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if flags&flagClobber == 0 {
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shouldContinue = prompt("clobber path", loc)
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}
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if flags&flagClobber != 0 || shouldContinue {
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if flags&flagVerbose != 0 {
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log.Printf("clobbering path: %s", loc)
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}
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if err := try(func() error { return os.RemoveAll(loc) }) ; err != nil {
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return false, err
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}
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} else {
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return false, nil
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}
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} else {
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if flags&flagVerbose != 0 {
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log.Printf("removing symlink: %s", loc)
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}
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if err := try(func() error { return os.Remove(loc) }); err != nil {
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return false, err
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}
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}
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}
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return true, nil
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}
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func createPath(loc string, flags int, mode os.FileMode) error {
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parentDir := filepath.Dir(loc)
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if _, err := os.Stat(parentDir); os.IsNotExist(err) {
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if flags&flagForce != 0 || prompt("force create path", parentDir) {
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if flags&flagVerbose != 0 {
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log.Printf("force creating path: %s", parentDir)
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}
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if err := os.MkdirAll(parentDir, mode); err != nil {
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return err
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}
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}
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}
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return nil
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}
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func makeVariantNames(name, variant string) []string {
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if nameParts := strings.Split(name, "__"); len(nameParts) > 1 {
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variant = nameParts[len(nameParts)-1]
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name = strings.Join(nameParts[:len(nameParts)-1], "")
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}
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names := []string{name}
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if len(variant) > 0 && !strings.HasSuffix(name, "__") {
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names = []string{fmt.Sprint(name, "__", variant), name}
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}
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return names
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}
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func prompt(prompts ...string) bool {
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for {
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fmt.Printf("%s: [y]es, [n]o? ", strings.Join(prompts, " "))
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var ans string
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fmt.Scanln(&ans)
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switch strings.ToLower(ans) {
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case "y":
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return true
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case "n":
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return false
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}
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}
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}
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func try(task func() error) error {
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for {
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err := task()
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if err == nil {
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return nil
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}
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loop:
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for {
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fmt.Printf("%s: [a]bort, [r]etry, [c]ancel? ", err)
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var ans string
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fmt.Scanln(&ans)
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switch strings.ToLower(ans) {
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case "a":
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return err
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case "r":
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break loop
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case "c":
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return nil
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}
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}
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}
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}
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