homemaker/util.go

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