forked from aptly-dev/aptly
/
list.go
437 lines (371 loc) · 10.6 KB
/
list.go
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package deb
import (
"fmt"
"github.com/smira/aptly/aptly"
"github.com/smira/aptly/utils"
"sort"
"strings"
)
// 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
}
// Verify interface
var (
_ sort.Interface = &PackageList{}
)
// NewPackageList creates empty package list
func NewPackageList() *PackageList {
return &PackageList{packages: make(map[string]*Package, 1000)}
}
// 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 := &PackageList{packages: make(map[string]*Package, 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 := string(p.Key(""))
existing, ok := l.packages[key]
if ok {
if !existing.Equals(p) {
return fmt.Errorf("conflict in package %s: %#v != %#v", p, existing, 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.packagesIndex[j].Name >= p.Name })
// 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
}
// 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: %#v != %#v", p, existing, 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, string(p.Key("")))
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
}
// 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 peformed for each architecture, in specified sources
func (l *PackageList) VerifyDependencies(options int, architectures []string, sources *PackageList, progress aptly.Progress) ([]Dependency, error) {
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.packages {
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))
missingCount := 0
for _, dep := range variants {
if dep.Architecture == "" {
dep.Architecture = arch
}
hash := dep.Hash()
r, ok := cache[hash]
if ok {
if !r {
missingCount++
}
continue
}
if sources.Search(dep) == nil {
variantsMissing = append(variantsMissing, dep)
missingCount++
} else {
cache[hash] = true
}
}
if options&DepFollowAllVariants == DepFollowAllVariants {
missing = append(missing, variantsMissing...)
for _, dep := range variantsMissing {
cache[dep.Hash()] = false
}
} else {
if missingCount == len(variants) {
missing = append(missing, variantsMissing...)
for _, dep := range variantsMissing {
cache[dep.Hash()] = false
}
}
}
}
}
}
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]
}
// Compare compares two names in lexographical order
func (l *PackageList) Less(i, j int) bool {
return l.packagesIndex[i].Name < l.packagesIndex[j].Name
}
// PrepareIndex prepares list for indexing
func (l *PackageList) PrepareIndex() {
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
}
// Search searches package index for specified package
func (l *PackageList) Search(dep Dependency) *Package {
if !l.indexed {
panic("list not indexed, can't search")
}
if dep.Relation == VersionDontCare {
for _, p := range l.providesIndex[dep.Pkg] {
if p.MatchesArchitecture(dep.Architecture) {
return p
}
}
}
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) {
return p
}
i++
}
return nil
}
// Filter filters package index by specified queries (ORed together), possibly pulling dependencies
func (l *PackageList) Filter(queries []string, 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 {
isDepQuery := strings.IndexAny(query, " (){}=<>") != -1
if !isDepQuery {
// try to interpret query as package string representation
// convert Package.String() to Package.Key()
i := strings.Index(query, "_")
if i != -1 {
pkg, query := query[:i], query[i+1:]
j := strings.LastIndex(query, "_")
if j != -1 {
version, arch := query[:j], query[j+1:]
p := l.packages["P"+arch+" "+pkg+" "+version]
if p != nil {
result.Add(p)
continue
}
}
}
}
// try as dependency
dep, err := ParseDependency(query)
if err != nil {
if isDepQuery {
return nil, err
}
// parsing failed, but probably that wasn't a dep query
continue
}
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) {
result.Add(p)
}
i++
}
}
if withDependencies {
added := result.Len()
dependencySource := NewPackageList()
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 {
p := l.Search(dep)
if p != nil {
result.Add(p)
dependencySource.Add(p)
added++
}
}
}
}
return result, nil
}