478 identify go binaries and extract mod information (#534)

* add query by MIME type to source.FileResolver

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

* import stereoscope lib changes to find mime type

- add bin cataloger
- add bin parser
- add mime type go utils
- import new resolver

Signed-off-by: Christopher Angelo Phillips <christopher.phillips@anchore.com>

* add go std library code to unpack bin

- keep them in their own (original) files
- add note for "this code was copied from"
- comment the lines the required changing

Signed-off-by: Christopher Angelo Phillips <christopher.phillips@anchore.com>
Co-authored-by: Alex Goodman <alex.goodman@anchore.com>

syft/source/directory_resolver.go

@@ -163,6 +163,7 @@ func (r directoryResolver) addPathToIndex(p string, info os.FileInfo) (string, e
 	if ref != nil {
 		r.refsByMIMEType[metadata.MIMEType] = append(r.refsByMIMEType[metadata.MIMEType], *ref)
 	}
+
 	r.metadata[ref.ID()] = metadata
 	return newRoot, nil
 }

syft/source/file_resolver.go

@@ -29,7 +29,7 @@ type FilePathResolver interface {
 	FilesByPath(paths ...string) ([]Location, error)
 	// FilesByGlob fetches a set of file references which the given glob matches
 	FilesByGlob(patterns ...string) ([]Location, error)
-	// FilesByGlob fetches a set of file references which the contents have been classified as one of the given MIME Types
+	// FilesByMIMEType fetches a set of file references which the contents have been classified as one of the given MIME Types
 	FilesByMIMEType(types ...string) ([]Location, error)
 	// RelativeFileByPath fetches a single file at the given path relative to the layer squash of the given reference.
 	// This is helpful when attempting to find a file that is in the same layer or lower as another file.