func toPackages(criteria criteria) []*database.Package {
// There are duplicates in Red Hat .xml files.
// This map is for deduplication.
packagesParameters := make(map[string]*database.Package)
possibilities := getPossibilities(criteria)
for _, criterions := range possibilities {
var (
pkg database.Package
osVersion int
err error
)
// Attempt to parse package data from trees of criterions.
for _, c := range criterions {
if strings.Contains(c.Comment, " is installed") {
const prefixLen = len("Red Hat Enterprise Linux ")
osVersion, err = strconv.Atoi(strings.TrimSpace(c.Comment[prefixLen : prefixLen+strings.Index(c.Comment[prefixLen:], " ")]))
if err != nil {
log.Warningf("could not parse Red Hat release version from: '%s'.", c.Comment)
}
} else if strings.Contains(c.Comment, " is earlier than ") {
const prefixLen = len(" is earlier than ")
pkg.Name = strings.TrimSpace(c.Comment[:strings.Index(c.Comment, " is earlier than ")])
pkg.Version, err = types.NewVersion(c.Comment[strings.Index(c.Comment, " is earlier than ")+prefixLen:])
if err != nil {
log.Warningf("could not parse package version '%s': %s. skipping", c.Comment[strings.Index(c.Comment, " is earlier than ")+prefixLen:], err.Error())
}
}
}
if osVersion > firstConsideredRHEL {
pkg.OS = "centos" + ":" + strconv.Itoa(osVersion)
} else {
continue
}
if pkg.OS != "" && pkg.Name != "" && pkg.Version.String() != "" {
packagesParameters[pkg.Key()] = &pkg
} else {
log.Warningf("could not determine a valid package from criterions: %v", criterions)
}
}
// Convert the map to slice.
var packagesParametersArray []*database.Package
for _, p := range packagesParameters {
packagesParametersArray = append(packagesParametersArray, p)
}
return packagesParametersArray
}
