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// SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
// Example for: *tvloader*, *spdx*
// This example demonstrates loading an SPDX tag-value file from disk into
// memory, and printing some of its contents to standard output.
package main
import (
"fmt"
"os"
"github.com/spdx/tools-golang/spdxlib"
"github.com/spdx/tools-golang/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 2.2 tag-value file <spdx-file-in>, and\n")
fmt.Printf(" print a portion of its contents.\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 2.2
doc, err := tvloader.Load2_2(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)
// we can now take a look at its contents via the various data
// structures representing the SPDX document's sections.
// print the struct containing the SPDX file's Creation Info section data
fmt.Printf("==============\n")
fmt.Printf("Creation info:\n")
fmt.Printf("==============\n")
fmt.Printf("%#v\n\n", doc.CreationInfo)
// check whether the SPDX file has at least one package that it describes
pkgIDs, err := spdxlib.GetDescribedPackageIDs2_2(doc)
if err != nil {
fmt.Printf("Unable to get describe packages from SPDX document: %v\n", err)
return
}
// it does, so we'll go through each one
for _, pkgID := range pkgIDs {
pkg, ok := doc.Packages[pkgID]
if !ok {
fmt.Printf("Package %s has described relationship but ID not found\n", string(pkgID))
continue
}
// check whether the package had its files analyzed
if !pkg.FilesAnalyzed {
fmt.Printf("Package %s (%s) had FilesAnalyzed: false\n", string(pkgID), pkg.PackageName)
continue
}
// also check whether the package has any files present
if pkg.Files == nil || len(pkg.Files) < 1 {
fmt.Printf("Package %s (%s) has no Files\n", string(pkgID), pkg.PackageName)
continue
}
// if we got here, there's at least one file
// print the filename and license info for the first 50
fmt.Printf("============================\n")
fmt.Printf("Package %s (%s)\n", string(pkgID), pkg.PackageName)
fmt.Printf("File info (up to first 50):\n")
i := 1
for _, f := range pkg.Files {
// note that these will be in random order, since we're pulling
// from a map. if we care about order, we should first pull the
// IDs into a slice, sort it, and then print the ordered files.
fmt.Printf("- File %d: %s\n", i, f.FileName)
fmt.Printf(" License from file: %v\n", f.LicenseInfoInFile)
fmt.Printf(" License concluded: %v\n", f.LicenseConcluded)
i++
if i > 50 {
break
}
}
}
}
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