package cmd /* Copyright © 2020 Jean-Marc Meessen, ON4KJM Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ import ( "os" //"log" "fmt" "path/filepath" ) // does the target file exist? // is the file defined // remove the extention //returning "" is considered as invalid func buildOutputFilename(output string, input string, overwrite bool) (outputFilename string, wasOK bool) { outputFilename = "" //validate that input is populated (should never happen if properly called) if input == "" { return "", false } //No output was provided, let's create one from the input file if output == "" { extension := filepath.Ext(input) outputRootPart := input[0:len(input)-len(extension)] output = outputRootPart + ".adi" fmt.Println("No output provided, defaulting to \""+output+ "\"" ) } //an output was provided by the user if output != "" { info, err := os.Stat(output) if os.IsNotExist(err) { return output, true } //It exisits but is a directory if info.IsDir() { fmt.Println("Error: specified output exists and is a directory") return "", false } if overwrite { //user accepted to overwrite the file return output, true } return "", false } return outputFilename, true } // fileExists checks if a file exists and is not a directory before we // try using it to prevent further errors. func fileExists(filename string) bool { info, err := os.Stat(filename) if os.IsNotExist(err) { return false } return !info.IsDir() }