1// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later 2 3// Example for: *json*, *tvsaver* 4 5// This example demonstrates loading an SPDX json from disk into memory, 6// and then re-saving it to a different file on disk in tag-value format . 7// Run project: go run examplejsontotv.go ../sample-docs/json/SPDXJSONExample-v2.2.spdx.json example.spdx 8package main 9 10import ( 11 "fmt" 12 "os" 13 14 spdx_json "github.com/spdx/tools-golang/json" 15 "github.com/spdx/tools-golang/tvsaver" 16) 17 18func main() { 19 20 // check that we've received the right number of arguments 21 args := os.Args 22 if len(args) != 3 { 23 fmt.Printf("Usage: %v <json-file-in> <spdx-file-out>\n", args[0]) 24 fmt.Printf(" Load JSON file <json-file-in>, and\n") 25 fmt.Printf(" save it out to <spdx-file-out>.\n") 26 return 27 } 28 29 // open the SPDX file 30 fileIn := args[1] 31 r, err := os.Open(fileIn) 32 if err != nil { 33 fmt.Printf("Error while opening %v for reading: %v", fileIn, err) 34 return 35 } 36 defer r.Close() 37 38 // try to load the SPDX file's contents as a json file, version 2.2 39 doc, err := spdx_json.Load2_2(r) 40 if err != nil { 41 fmt.Printf("Error while parsing %v: %v", args[1], err) 42 return 43 } 44 45 // if we got here, the file is now loaded into memory. 46 fmt.Printf("Successfully loaded %s\n", args[1]) 47 48 // we can now save it back to disk, using tvsaver. 49 50 // create a new file for writing 51 fileOut := args[2] 52 w, err := os.Create(fileOut) 53 if err != nil { 54 fmt.Printf("Error while opening %v for writing: %v", fileOut, err) 55 return 56 } 57 defer w.Close() 58 59 // try to save the document to disk as an SPDX tag-value file, version 2.2 60 err = tvsaver.Save2_2(doc, w) 61 if err != nil { 62 fmt.Printf("Error while saving %v: %v", fileOut, err) 63 return 64 } 65 66 // it worked 67 fmt.Printf("Successfully saved %s\n", fileOut) 68} 69