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console.go
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console.go
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/*
* Copyright (C) 2015-2019 Virgil Security Inc.
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* (1) Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* (2) Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* (3) Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ''AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* Lead Maintainer: Virgil Security Inc. <support@virgilsecurity.com>
*/
package utils
import (
"bufio"
"fmt"
"io/ioutil"
"os"
"strings"
"gopkg.in/urfave/cli.v2"
)
func ReadKeyStringFromFile(context *cli.Context, fileName string) (string, error) {
value := ""
f, err := os.Open(fileName)
if err != nil {
return "", err
}
defer func() {
if err := f.Close(); err != nil {
panic(err)
}
}()
scanner := bufio.NewScanner(f)
for scanner.Scan() {
t := scanner.Text()
if strings.Contains(t, "BEGIN ") {
continue
}
value = t
break
}
return value, nil
}
func ReadFileFlagOrParamOrFromConsole(context *cli.Context, flag, paramName, paramDescription string) ([]byte, error) {
inputFileName := ReadFlagOrDefault(context, flag, "")
if inputFileName == "" {
return []byte(ReadParamOrDefaultOrFromConsole(context, paramName, paramDescription, "")), nil
}
return ioutil.ReadFile(inputFileName)
}
func ReadParamOrDefaultOrFromConsole(context *cli.Context, paramName, paramDescription, defaultValue string) string {
value := strings.Join(context.Args().Slice(), " ")
if value != "" {
if len(value) < 3 {
fmt.Printf("%s length can't be less than 3\n", paramName)
} else {
return value
}
}
if defaultValue != "" {
return defaultValue
}
return ReadConsoleValue(paramName, paramDescription)
}
func ReadConsoleValue(paramName, paramDescription string, options ...string) string {
fmt.Printf("%s:\n", paramDescription)
scanner := bufio.NewScanner(os.Stdin)
value := ""
valueSet := false
for !valueSet {
scanner.Scan()
value = scanner.Text()
if len(options) == 0 {
if len(value) < 3 {
fmt.Printf("%s length can't be less than 3\n", paramName)
fmt.Printf("%s:\n", paramDescription)
} else {
valueSet = true
}
} else {
if !contains(options, value) {
fmt.Printf("invalid %s value\n", paramName)
fmt.Printf("%s:\n", paramDescription)
} else {
valueSet = true
}
}
}
return value
}
func contains(array []string, value string) bool {
for _, s := range array {
if s == value {
return true
}
}
return false
}
func ReadFlagOrDefault(context *cli.Context, flagName, defaultValue string) string {
value := context.String(flagName)
if value != "" {
return value
}
return defaultValue
}
func ReadFlagOrConsoleValue(context *cli.Context, flagName, paramDescription string, options ...string) string {
value := context.String(flagName)
if value != "" {
if len(options) == 0 {
return value
}
if contains(options, value) {
return value
}
fmt.Printf("incorrect flag %s value\n", flagName)
}
return ReadConsoleValue(flagName, paramDescription, options...)
}