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// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
// Example for: *reporter*, *tvloader*
// This example demonstrates loading an SPDX tag-value file from disk into memory,
// generating a basic report listing counts of the concluded licenses for its
// files, and printing the report to standard output.
package main
import (
"fmt"
"os"
"github.com/spdx/tools-golang/v0/reporter"
"github.com/spdx/tools-golang/v0/tvloader"
)
func main() {
// check that we've received the right number of arguments
args := os.Args
if len(args) != 2 {
fmt.Printf("Usage: %v <spdx-file-in>\n", args[0])
fmt.Printf(" Load SPDX 2.1 tag-value file <spdx-file-in>, and\n")
fmt.Printf(" generate and print a report of its concluded licenses.\n")
return
}
// open the SPDX file
filename := args[1]
r, err := os.Open(filename)
if err != nil {
fmt.Printf("Error while opening %v for reading: %v", filename, err)
return
}
defer r.Close()
// try to load the SPDX file's contents as a tag-value file, version 2.1
doc, err := tvloader.Load2_1(r)
if err != nil {
fmt.Printf("Error while parsing %v: %v", filename, err)
return
}
// if we got here, the file is now loaded into memory.
fmt.Printf("Successfully loaded %s\n\n", filename)
// check whether the SPDX file has at least one package
if doc.Packages == nil || len(doc.Packages) < 1 {
fmt.Printf("No packages found in SPDX document\n")
return
}
// it does, so we'll choose the first one
pkg := doc.Packages[0]
// check whether the package had its files analyzed
if !pkg.FilesAnalyzed {
fmt.Printf("First Package (%s) had FilesAnalyzed: false\n", pkg.PackageName)
return
}
// also check whether the package has any files present
if pkg.Files == nil || len(pkg.Files) < 1 {
fmt.Printf("No Files found in first Package (%s)\n", pkg.PackageName)
return
}
// if we got here, there's at least one file
// generate and print a report of the Package's Files' LicenseConcluded
// values, sorted by # of occurrences
err = reporter.Generate(pkg, os.Stdout)
if err != nil {
fmt.Printf("Error while generating report: %v\n", err)
}
}
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