github.com/anchore/syft@v1.38.2/syft/pkg/cataloger/haskell/parse_stack_yaml.go (about)

     1  package haskell
     2  
     3  import (
     4  	"context"
     5  	"fmt"
     6  	"io"
     7  
     8  	"go.yaml.in/yaml/v3"
     9  
    10  	"github.com/anchore/syft/internal/log"
    11  	"github.com/anchore/syft/internal/unknown"
    12  	"github.com/anchore/syft/syft/artifact"
    13  	"github.com/anchore/syft/syft/file"
    14  	"github.com/anchore/syft/syft/pkg"
    15  	"github.com/anchore/syft/syft/pkg/cataloger/generic"
    16  )
    17  
    18  var _ generic.Parser = parseStackYaml
    19  
    20  type stackYaml struct {
    21  	ExtraDeps []string `yaml:"extra-deps"`
    22  }
    23  
    24  // parseStackYaml is a parser function for stack.yaml contents, returning all packages discovered.
    25  func parseStackYaml(_ context.Context, _ file.Resolver, _ *generic.Environment, reader file.LocationReadCloser) ([]pkg.Package, []artifact.Relationship, error) {
    26  	bytes, err := io.ReadAll(reader)
    27  	if err != nil {
    28  		return nil, nil, fmt.Errorf("failed to load stack.yaml file: %w", err)
    29  	}
    30  
    31  	var stackFile stackYaml
    32  
    33  	if err := yaml.Unmarshal(bytes, &stackFile); err != nil {
    34  		log.WithFields("error", err, "path", reader.RealPath).Trace("failed to parse stack.yaml")
    35  		return nil, nil, fmt.Errorf("failed to parse stack.yaml file")
    36  	}
    37  
    38  	var pkgs []pkg.Package
    39  	for _, dep := range stackFile.ExtraDeps {
    40  		pkgName, pkgVersion, pkgHash := parseStackPackageEncoding(dep)
    41  		pkgs = append(
    42  			pkgs,
    43  			newPackage(
    44  				pkgName,
    45  				pkgVersion,
    46  				pkg.HackageStackYamlEntry{
    47  					PkgHash: pkgHash,
    48  				},
    49  				reader.Location,
    50  			),
    51  		)
    52  	}
    53  
    54  	return pkgs, nil, unknown.IfEmptyf(pkgs, "unable to determine packages")
    55  }