forked from aptly-dev/aptly
/
list.go
518 lines (431 loc) · 12.2 KB
/
list.go
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package deb
import (
"fmt"
"github.com/smira/aptly/aptly"
"github.com/smira/aptly/utils"
"sort"
)
// Dependency options
const (
// DepFollowSource pulls source packages when required
DepFollowSource = 1 << iota
// DepFollowSuggests pulls from suggests
DepFollowSuggests
// DepFollowRecommends pulls from recommends
DepFollowRecommends
// DepFollowAllVariants follows all variants if depends on "a | b"
DepFollowAllVariants
// DepFollowBuild pulls build dependencies
DepFollowBuild
)
// PackageList is list of unique (by key) packages
//
// It could be seen as repo snapshot, repo contents, result of filtering,
// merge, etc.
//
// If indexed, PackageList starts supporting searching
type PackageList struct {
// Straight list of packages as map
packages map[string]*Package
// Has index been prepared?
indexed bool
// Indexed list of packages, sorted by name internally
packagesIndex []*Package
// Map of packages for each virtual package (provides)
providesIndex map[string][]*Package
// Package key generation function
keyFunc func(p *Package) string
// Allow duplicates?
duplicatesAllowed bool
}
// PackageConflictError means that package can't be added to the list due to error
type PackageConflictError struct {
error
}
// Verify interface
var (
_ sort.Interface = &PackageList{}
_ PackageCatalog = &PackageList{}
)
func packageShortKey(p *Package) string {
return string(p.ShortKey(""))
}
func packageFullKey(p *Package) string {
return string(p.Key(""))
}
// NewPackageList creates empty package list without duplicate package
func NewPackageList() *PackageList {
return NewPackageListWithDuplicates(false, 1000)
}
func NewPackageListWithDuplicates(duplicates bool, capacity int) *PackageList {
if capacity == 0 {
capacity = 1000
}
result := &PackageList{
packages: make(map[string]*Package, capacity),
duplicatesAllowed: duplicates,
keyFunc: packageShortKey,
}
if duplicates {
result.keyFunc = packageFullKey
}
return result
}
// NewPackageListFromRefList loads packages list from PackageRefList
func NewPackageListFromRefList(reflist *PackageRefList, collection *PackageCollection, progress aptly.Progress) (*PackageList, error) {
// empty reflist
if reflist == nil {
return NewPackageList(), nil
}
result := NewPackageListWithDuplicates(false, reflist.Len())
if progress != nil {
progress.InitBar(int64(reflist.Len()), false)
}
err := reflist.ForEach(func(key []byte) error {
p, err2 := collection.ByKey(key)
if err2 != nil {
return fmt.Errorf("unable to load package with key %s: %s", key, err2)
}
if progress != nil {
progress.AddBar(1)
}
return result.Add(p)
})
if progress != nil {
progress.ShutdownBar()
}
if err != nil {
return nil, err
}
return result, nil
}
// Add appends package to package list, additionally checking for uniqueness
func (l *PackageList) Add(p *Package) error {
key := l.keyFunc(p)
existing, ok := l.packages[key]
if ok {
if !existing.Equals(p) {
return &PackageConflictError{fmt.Errorf("conflict in package %s", p)}
}
return nil
}
l.packages[key] = p
if l.indexed {
for _, provides := range p.Provides {
l.providesIndex[provides] = append(l.providesIndex[provides], p)
}
i := sort.Search(len(l.packagesIndex), func(j int) bool { return l.lessPackages(p, l.packagesIndex[j]) })
// insert p into l.packagesIndex in position i
l.packagesIndex = append(l.packagesIndex, nil)
copy(l.packagesIndex[i+1:], l.packagesIndex[i:])
l.packagesIndex[i] = p
}
return nil
}
// ForEach calls handler for each package in list
func (l *PackageList) ForEach(handler func(*Package) error) error {
var err error
for _, p := range l.packages {
err = handler(p)
if err != nil {
return err
}
}
return err
}
// ForEachIndexed calls handler for each package in list in indexed order
func (l *PackageList) ForEachIndexed(handler func(*Package) error) error {
if !l.indexed {
panic("list not indexed, can't iterate")
}
var err error
for _, p := range l.packagesIndex {
err = handler(p)
if err != nil {
return err
}
}
return err
}
// Len returns number of packages in the list
func (l *PackageList) Len() int {
return len(l.packages)
}
// Append adds content from one package list to another
func (l *PackageList) Append(pl *PackageList) error {
if l.indexed {
panic("Append not supported when indexed")
}
for k, p := range pl.packages {
existing, ok := l.packages[k]
if ok {
if !existing.Equals(p) {
return fmt.Errorf("conflict in package %s", p)
}
} else {
l.packages[k] = p
}
}
return nil
}
// Remove removes package from the list, and updates index when required
func (l *PackageList) Remove(p *Package) {
delete(l.packages, l.keyFunc(p))
if l.indexed {
for _, provides := range p.Provides {
for i, pkg := range l.providesIndex[provides] {
if pkg.Equals(p) {
// remove l.ProvidesIndex[provides][i] w/o preserving order
l.providesIndex[provides][len(l.providesIndex[provides])-1], l.providesIndex[provides][i], l.providesIndex[provides] =
nil, l.providesIndex[provides][len(l.providesIndex[provides])-1], l.providesIndex[provides][:len(l.providesIndex[provides])-1]
break
}
}
}
i := sort.Search(len(l.packagesIndex), func(j int) bool { return l.packagesIndex[j].Name >= p.Name })
for i < len(l.packagesIndex) && l.packagesIndex[i].Name == p.Name {
if l.packagesIndex[i].Equals(p) {
// remove l.packagesIndex[i] preserving order
copy(l.packagesIndex[i:], l.packagesIndex[i+1:])
l.packagesIndex[len(l.packagesIndex)-1] = nil
l.packagesIndex = l.packagesIndex[:len(l.packagesIndex)-1]
break
}
i++
}
}
}
// Architectures returns list of architectures present in packages and flag if source packages are present.
//
// If includeSource is true, meta-architecture "source" would be present in the list
func (l *PackageList) Architectures(includeSource bool) (result []string) {
result = make([]string, 0, 10)
for _, pkg := range l.packages {
if pkg.Architecture != "all" && (pkg.Architecture != "source" || includeSource) && !utils.StrSliceHasItem(result, pkg.Architecture) {
result = append(result, pkg.Architecture)
}
}
return
}
// Strings builds list of strings with package keys
func (l *PackageList) Strings() []string {
result := make([]string, l.Len())
i := 0
for _, p := range l.packages {
result[i] = string(p.Key(""))
i += 1
}
return result
}
// depSliceDeduplicate removes dups in slice of Dependencies
func depSliceDeduplicate(s []Dependency) []Dependency {
l := len(s)
if l < 2 {
return s
}
if l == 2 {
if s[0] == s[1] {
return s[0:1]
}
return s
}
found := make(map[string]bool, l)
j := 0
for i, x := range s {
h := x.Hash()
if !found[h] {
found[h] = true
s[j] = s[i]
j++
}
}
return s[:j]
}
// VerifyDependencies looks for missing dependencies in package list.
//
// Analysis would be performed for each architecture, in specified sources
func (l *PackageList) VerifyDependencies(options int, architectures []string, sources *PackageList, progress aptly.Progress) ([]Dependency, error) {
l.PrepareIndex()
missing := make([]Dependency, 0, 128)
if progress != nil {
progress.InitBar(int64(l.Len())*int64(len(architectures)), false)
}
for _, arch := range architectures {
cache := make(map[string]bool, 2048)
for _, p := range l.packagesIndex {
if progress != nil {
progress.AddBar(1)
}
if !p.MatchesArchitecture(arch) {
continue
}
for _, dep := range p.GetDependencies(options) {
variants, err := ParseDependencyVariants(dep)
if err != nil {
return nil, fmt.Errorf("unable to process package %s: %s", p, err)
}
variants = depSliceDeduplicate(variants)
variantsMissing := make([]Dependency, 0, len(variants))
for _, dep := range variants {
if dep.Architecture == "" {
dep.Architecture = arch
}
hash := dep.Hash()
satisfied, ok := cache[hash]
if !ok {
satisfied = sources.Search(dep, false) != nil
cache[hash] = satisfied
}
if !satisfied && !ok {
variantsMissing = append(variantsMissing, dep)
}
if satisfied && options&DepFollowAllVariants == 0 {
variantsMissing = nil
break
}
}
missing = append(missing, variantsMissing...)
}
}
}
if progress != nil {
progress.ShutdownBar()
}
return missing, nil
}
// Swap swaps two packages in index
func (l *PackageList) Swap(i, j int) {
l.packagesIndex[i], l.packagesIndex[j] = l.packagesIndex[j], l.packagesIndex[i]
}
func (l *PackageList) lessPackages(iPkg, jPkg *Package) bool {
if iPkg.Name == jPkg.Name {
cmp := CompareVersions(iPkg.Version, jPkg.Version)
if cmp == 0 {
return iPkg.Architecture < jPkg.Architecture
}
return cmp == 1
}
return iPkg.Name < jPkg.Name
}
// Less compares two packages by name (lexographical) and version (latest to oldest)
func (l *PackageList) Less(i, j int) bool {
return l.lessPackages(l.packagesIndex[i], l.packagesIndex[j])
}
// PrepareIndex prepares list for indexing
func (l *PackageList) PrepareIndex() {
if l.indexed {
return
}
l.packagesIndex = make([]*Package, l.Len())
l.providesIndex = make(map[string][]*Package, 128)
i := 0
for _, p := range l.packages {
l.packagesIndex[i] = p
i++
for _, provides := range p.Provides {
l.providesIndex[provides] = append(l.providesIndex[provides], p)
}
}
sort.Sort(l)
l.indexed = true
}
// Scan searches package index using full scan
func (l *PackageList) Scan(q PackageQuery) (result *PackageList) {
result = NewPackageListWithDuplicates(l.duplicatesAllowed, 0)
for _, pkg := range l.packages {
if q.Matches(pkg) {
result.Add(pkg)
}
}
return
}
// SearchSupported returns true for PackageList
func (l *PackageList) SearchSupported() bool {
return true
}
// SearchByKey looks up package by exact key reference
func (l *PackageList) SearchByKey(arch, name, version string) (result *PackageList) {
result = NewPackageListWithDuplicates(l.duplicatesAllowed, 0)
pkg := l.packages["P"+arch+" "+name+" "+version]
if pkg != nil {
result.Add(pkg)
}
return
}
// Search searches package index for specified package(s) using optimized queries
func (l *PackageList) Search(dep Dependency, allMatches bool) (searchResults []*Package) {
if !l.indexed {
panic("list not indexed, can't search")
}
if dep.Relation == VersionDontCare {
for _, p := range l.providesIndex[dep.Pkg] {
if dep.Architecture == "" || p.MatchesArchitecture(dep.Architecture) {
searchResults = append(searchResults, p)
if !allMatches {
break
}
}
}
}
i := sort.Search(len(l.packagesIndex), func(j int) bool { return l.packagesIndex[j].Name >= dep.Pkg })
for i < len(l.packagesIndex) && l.packagesIndex[i].Name == dep.Pkg {
p := l.packagesIndex[i]
if p.MatchesDependency(dep) {
searchResults = append(searchResults, p)
if !allMatches {
break
}
}
i++
}
return
}
// Filter filters package index by specified queries (ORed together), possibly pulling dependencies
func (l *PackageList) Filter(queries []PackageQuery, withDependencies bool, source *PackageList, dependencyOptions int, architecturesList []string) (*PackageList, error) {
if !l.indexed {
panic("list not indexed, can't filter")
}
result := NewPackageList()
for _, query := range queries {
result.Append(query.Query(l))
}
if withDependencies {
added := result.Len()
result.PrepareIndex()
dependencySource := NewPackageList()
if source != nil {
dependencySource.Append(source)
}
dependencySource.Append(result)
dependencySource.PrepareIndex()
// while some new dependencies were discovered
for added > 0 {
added = 0
// find missing dependencies
missing, err := result.VerifyDependencies(dependencyOptions, architecturesList, dependencySource, nil)
if err != nil {
return nil, err
}
// try to satisfy dependencies
for _, dep := range missing {
// dependency might have already been satisfied
// with packages already been added
if result.Search(dep, false) != nil {
continue
}
searchResults := l.Search(dep, false)
if searchResults != nil {
for _, p := range searchResults {
result.Add(p)
dependencySource.Add(p)
added++
if dependencyOptions&DepFollowAllVariants == 0 {
break
}
}
}
}
}
}
return result, nil
}