// detectAndInsertInstalledAndRemovedPackages finds the installed and removed
// package nodes and inserts the installed packages into the database.
func detectAndInsertInstalledAndRemovedPackages(detectedOS string, packageList []*database.Package, parent *database.Layer) (installedNodes, removedNodes []string, err error) {
// Get the parent layer's packages.
parentPackageNodes, err := parent.AllPackages()
if err != nil {
return nil, nil, err
}
parentPackages, err := database.FindAllPackagesByNodes(parentPackageNodes, []string{database.FieldPackageName, database.FieldPackageVersion})
if err != nil {
return nil, nil, err
}
// Map detected packages (name:version) string to packages.
packagesNVMapToPackage := make(map[string]*database.Package)
for _, p := range packageList {
packagesNVMapToPackage[p.Name+":"+p.Version.String()] = p
}
// Map parent's packages (name:version) string to nodes.
parentPackagesNVMapToNodes := make(map[string]string)
for _, p := range parentPackages {
parentPackagesNVMapToNodes[p.Name+":"+p.Version.String()] = p.Node
}
// Build a list of the parent layer's packages' node values.
var parentPackagesNV []string
for _, p := range parentPackages {
parentPackagesNV = append(parentPackagesNV, p.Name+":"+p.Version.String())
}
// Build a list of the layer packages' node values.
var layerPackagesNV []string
for _, p := range packageList {
layerPackagesNV = append(layerPackagesNV, p.Name+":"+p.Version.String())
}
// Calculate the installed and removed packages.
removedPackagesNV := utils.CompareStringLists(parentPackagesNV, layerPackagesNV)
installedPackagesNV := utils.CompareStringLists(layerPackagesNV, parentPackagesNV)
// Build a list of all the installed packages.
var installedPackages []*database.Package
for _, nv := range installedPackagesNV {
p, _ := packagesNVMapToPackage[nv]
p.OS = detectedOS
installedPackages = append(installedPackages, p)
}
// Insert that list into the database.
err = database.InsertPackages(installedPackages)
if err != nil {
return nil, nil, err
}
// Build the list of installed package nodes.
for _, p := range installedPackages {
if p.Node != "" {
installedNodes = append(installedNodes, p.Node)
}
}
// Build the list of removed package nodes.
for _, nv := range removedPackagesNV {
node, _ := parentPackagesNVMapToNodes[nv]
removedNodes = append(removedNodes, node)
}
return
}
