github.com/anchore/syft@v1.38.2/internal/os/feature_detection.go (about)

     1  package os
     2  
     3  import (
     4  	"context"
     5  	"fmt"
     6  	"regexp"
     7  
     8  	"github.com/anchore/syft/internal"
     9  	"github.com/anchore/syft/internal/log"
    10  	"github.com/anchore/syft/internal/sbomsync"
    11  	"github.com/anchore/syft/syft/file"
    12  	"github.com/anchore/syft/syft/linux"
    13  	"github.com/anchore/syft/syft/sbom"
    14  )
    15  
    16  func DetectFeatures(_ context.Context, resolver file.Resolver, builder sbomsync.Builder) error {
    17  	builder.(sbomsync.Accessor).WriteToSBOM(func(s *sbom.SBOM) {
    18  		if s.Artifacts.LinuxDistribution == nil {
    19  			return
    20  		}
    21  
    22  		err := findRhelFeatures(resolver, s.Artifacts.LinuxDistribution)
    23  		if err != nil {
    24  			log.WithFields("error", err, "release", s.Artifacts.LinuxDistribution).Trace("error searching for extended support")
    25  		}
    26  	})
    27  
    28  	return nil
    29  }
    30  
    31  func findRhelFeatures(resolver file.Resolver, release *linux.Release) error {
    32  	if release == nil || release.ID != "rhel" {
    33  		return nil
    34  	}
    35  	contentManifestFiles, err := resolver.FilesByGlob("/root/buildinfo/content_manifests/*.json")
    36  	if err != nil {
    37  		return fmt.Errorf("unable to find content manifests: %w", err)
    38  	}
    39  	for _, contentManifestFile := range contentManifestFiles {
    40  		found, err := hasRhelExtendedSupportInContentManifest(resolver, contentManifestFile)
    41  		if err != nil {
    42  			return fmt.Errorf("unable to read content manifest from %s: %w", contentManifestFile.String(), err)
    43  		}
    44  		if found {
    45  			release.ExtendedSupport = true
    46  			break
    47  		}
    48  	}
    49  	return nil
    50  }
    51  
    52  func hasRhelExtendedSupportInContentManifest(resolver file.Resolver, contentManifestFile file.Location) (bool, error) {
    53  	contents, err := resolver.FileContentsByLocation(contentManifestFile)
    54  	if err != nil {
    55  		return false, fmt.Errorf("unable to read content manifest from %s: %w", contentManifestFile.String(), err)
    56  	}
    57  	defer internal.CloseAndLogError(contents, "content-manifest")
    58  
    59  	patterns := []*regexp.Regexp{regexp.MustCompile(`baseos-eus`), regexp.MustCompile(`baseos-eus|appstream-eus`)}
    60  	return internal.MatchAnyFromReader(contents, patterns...)
    61  }