/
repo_index.go
416 lines (351 loc) · 10.7 KB
/
repo_index.go
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//
// Copyright © 2017-2019 Solus Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
package core
import (
"encoding/xml"
"fmt"
"os"
"path/filepath"
"sort"
"strings"
log "github.com/sirupsen/logrus"
"github.com/getsolus/ferryd/src/libdb"
"github.com/getsolus/ferryd/src/libeopkg"
)
// initDistribution will look for the distribution.xml file which will define
// the all-important Obsoletes set
func (r *Repository) initDistribution() error {
r.dist = nil
dpath := filepath.Join(r.assetPath, "distribution.xml")
if !PathExists(dpath) {
log.WithFields(log.Fields{
"repo": r.ID,
}).Warning("No distribution.xml defined")
return nil
}
dist, err := libeopkg.NewDistribution(dpath)
if err != nil {
return err
}
r.dist = dist
return nil
}
// emitDistribution is responsible for loading the distribution.xml file from
// the assets store and merging it into the final index
func (r *Repository) emitDistribution(encoder *xml.Encoder) error {
elem := xml.StartElement{
Name: xml.Name{
Local: "Distribution",
},
}
return encoder.EncodeElement(r.dist, elem)
}
// emitComponents is responsible for loading the components.xml file from
// the assets store and merging it into the final index
func (r *Repository) emitComponents(encoder *xml.Encoder) error {
dpath := filepath.Join(r.assetPath, "components.xml")
if !PathExists(dpath) {
log.WithFields(log.Fields{
"repo": r.ID,
}).Warning("No components.xml defined")
return nil
}
comp, err := libeopkg.NewComponents(dpath)
if err != nil {
return err
}
elem := xml.StartElement{
Name: xml.Name{
Local: "Component",
},
}
for i := range comp.Components {
c := &comp.Components[i]
if err := encoder.EncodeElement(c, elem); err != nil {
return err
}
}
// Now finalise the document
return nil
}
// emitGroups is responsible for loading the groups.xml file from
// the assets store and merging it into the final index
func (r *Repository) emitGroups(encoder *xml.Encoder) error {
dpath := filepath.Join(r.assetPath, "groups.xml")
if !PathExists(dpath) {
log.WithFields(log.Fields{
"repo": r.ID,
}).Warning("No groups.xml defined")
return nil
}
grp, err := libeopkg.NewGroups(dpath)
if err != nil {
return err
}
elem := xml.StartElement{
Name: xml.Name{
Local: "Group",
},
}
for i := range grp.Groups {
g := &grp.Groups[i]
if err := encoder.EncodeElement(g, elem); err != nil {
return err
}
}
return nil
}
// pushDeltaPackages will insert all applicable (usable) delta packages from
// our repository into the emitted index
func (r *Repository) pushDeltaPackages(db libdb.Database, pool *Pool, entry *PoolEntry) error {
// Get our local entry
repoEntry, err := r.GetEntry(db, entry.Meta.Name)
if err != nil {
return err
}
var deltas []libeopkg.Delta
// Find all delta IDs
for _, id := range repoEntry.Deltas {
poolEnt, err := pool.GetEntry(db, id)
if err != nil {
return err
}
if poolEnt.Delta == nil {
return fmt.Errorf("invalid delta record, corruption: %s", id)
}
// Basically the ToRelease must be for this release
if poolEnt.Delta.ToRelease != entry.Meta.GetRelease() {
continue
}
// Insert delta and clone the pool entry meta for it
deltas = append(deltas, libeopkg.Delta{
ReleaseFrom: poolEnt.Delta.FromRelease,
PackageURI: poolEnt.Meta.PackageURI,
PackageSize: poolEnt.Meta.PackageSize,
PackageHash: poolEnt.Meta.PackageHash,
})
}
// Deltas implicitly sorted by sort.Strings on their IDs
if deltas != nil && len(deltas) > 0 {
entry.Meta.DeltaPackages = &deltas
}
return nil
}
func (r *Repository) emitIndexPackage(db libdb.Database, pool *Pool, pkg string, encoder *xml.Encoder, entry *PoolEntry) error {
// Wrap every output item as Package
elem := xml.StartElement{
Name: xml.Name{
Local: "Package",
},
}
// Retain compatibility with eopkg, auto-drop -dbginfo
nom := entry.Meta.Name
if strings.HasSuffix(nom, "-dbginfo") {
nom = nom[0 : len(nom)-8]
}
// Check if its obsolete, if its automatically obsolete through our
// dbginfo trick, warn in the console
if r.dist != nil && r.dist.IsObsolete(nom) {
if nom != entry.Name {
log.WithFields(log.Fields{
"repo": r.ID,
"id": pkg,
}).Error("Abandoned obsolete package, please run 'trim obsolete'")
}
return nil
}
// Warn that a package depends on an obsolete package so that it can be
// purged from the repo (as it won't work!)
if entry.Meta.RuntimeDependencies != nil && r.dist != nil {
for _, p := range *entry.Meta.RuntimeDependencies {
if r.dist.IsObsolete(p.Name) {
log.WithFields(log.Fields{
"repo": r.ID,
"package": entry.Name,
"dependency": p.Name,
}).Warning("Encountered uninstallable package depending on obsolete package. Please address")
}
}
}
// Shove in the delta packages now
if err := r.pushDeltaPackages(db, pool, entry); err != nil {
return err
}
return encoder.EncodeElement(entry.Meta, elem)
}
// emitIndex does the heavy lifting of writing to the given file descriptor,
// i.e. serialising the DB repo out to the index file
func (r *Repository) emitIndex(db libdb.Database, pool *Pool, file *os.File) error {
var pkgIds []string
rootBucket := db.Bucket([]byte(DatabaseBucketRepo)).Bucket([]byte(r.ID)).Bucket([]byte(DatabaseBucketPackage))
err := rootBucket.ForEach(func(k, v []byte) error {
entry := RepoEntry{}
if err := rootBucket.Decode(v, &entry); err != nil {
return err
}
if r.dist != nil && r.dist.IsObsolete(entry.Name) {
return nil
}
pkgIds = append(pkgIds, entry.Published)
return nil
})
if err != nil {
return err
}
// Ensure we'll emit in a sane order
sort.Strings(pkgIds)
encoder := xml.NewEncoder(file)
encoder.Indent(" ", " ")
// Ensure we have the start element
if err := encoder.EncodeToken(xml.StartElement{Name: xml.Name{Local: "PISI"}}); err != nil {
return err
}
// Ensure distribution is at the head
if err := r.emitDistribution(encoder); err != nil {
return err
}
for _, pkg := range pkgIds {
entry, err := pool.GetEntry(db, pkg)
if err != nil {
return err
}
if err = r.emitIndexPackage(db, pool, pkg, encoder, entry); err != nil {
return err
}
}
// Stick in the components
if err := r.emitComponents(encoder); err != nil {
return err
}
// Stick in the groups ..
if err := r.emitGroups(encoder); err != nil {
return err
}
// Now finalise the document
if err := encoder.EncodeToken(xml.EndElement{Name: xml.Name{Local: "PISI"}}); err != nil {
return err
}
return encoder.Flush()
}
// Index will attempt to write the eopkg index out to disk
// This only requires a read-only database view
func (r *Repository) Index(db libdb.Database, pool *Pool) error {
r.indexMut.Lock()
defer r.indexMut.Unlock()
var errAbort error
indexPath := filepath.Join(r.path, "eopkg-index.xml.new")
indexPathFinal := filepath.Join(r.path, "eopkg-index.xml")
mapping := make(map[string]string)
mapping[indexPath] = indexPathFinal
defer func() {
if errAbort != nil {
for k := range mapping {
log.WithFields(log.Fields{
"id": r.ID,
"path": k,
"error": errAbort,
}).Error("Removing potentially corrupt index file")
os.Remove(k)
}
}
}()
if err := r.initDistribution(); err != nil {
return err
}
// Create index file
f, err := os.Create(indexPath)
if err != nil {
errAbort = err
return errAbort
}
// Write the index file
errAbort = r.emitIndex(db, pool, f)
f.Close()
if errAbort != nil {
return errAbort
}
// Sing the theme tune
indexPathSha := filepath.Join(r.path, "eopkg-index.xml.sha1sum.new")
indexPathShaFinal := filepath.Join(r.path, "eopkg-index.xml.sha1sum")
mapping[indexPathSha] = indexPathShaFinal
// Star in it
if errAbort = WriteSha1sum(indexPath, indexPathSha); err != nil {
return errAbort
}
// Create a sha256sum file as well
indexPathSha256 := filepath.Join(r.path, "eopkg-index.xml.sha256sum.new")
indexPathSha256Final := filepath.Join(r.path, "eopkg-index.xml.sha256sum")
mapping[indexPathSha256] = indexPathSha256Final
if errAbort = WriteSha256sum(indexPath, indexPathSha256); err != nil {
return errAbort
}
// Write our XZ index out
indexPathXz := filepath.Join(r.path, "eopkg-index.xml.new.xz")
indexPathXzFinal := filepath.Join(r.path, "eopkg-index.xml.xz")
mapping[indexPathXz] = indexPathXzFinal
if errAbort = libeopkg.XzFile(indexPath, true); errAbort != nil {
return errAbort
}
// Write sha1sum for our xz file
indexPathXzSha := filepath.Join(r.path, "eopkg-index.xml.xz.sha1sum.new")
indexPathXzShaFinal := filepath.Join(r.path, "eopkg-index.xml.xz.sha1sum")
mapping[indexPathXzSha] = indexPathXzShaFinal
// xz sha1
if errAbort = WriteSha1sum(indexPathXz, indexPathXzSha); err != nil {
return errAbort
}
// Write sha256sum for our xz file
indexPathXzSha256 := filepath.Join(r.path, "eopkg-index.xml.xz.sha256sum.new")
indexPathXzSha256Final := filepath.Join(r.path, "eopkg-index.xml.xz.sha256sum")
mapping[indexPathXzSha256] = indexPathXzSha256Final
// xz sha256
if errAbort = WriteSha256sum(indexPathXz, indexPathXzSha256); err != nil {
return errAbort
}
// Write our zstd index out
indexPathZst := filepath.Join(r.path, "eopkg-index.xml.new.zst")
indexPathZstFinal := filepath.Join(r.path, "eopkg-index.xml.zst")
mapping[indexPathZst] = indexPathZstFinal
if errAbort = libeopkg.ZstdFile(indexPath, true); errAbort != nil {
return errAbort
}
// Write sha1sum for our xz file
indexPathZstSha := filepath.Join(r.path, "eopkg-index.xml.zst.sha1sum.new")
indexPathZstShaFinal := filepath.Join(r.path, "eopkg-index.xml.zst.sha1sum")
mapping[indexPathZstSha] = indexPathZstShaFinal
// Zst sha1
if errAbort = WriteSha1sum(indexPathZst, indexPathZstSha); err != nil {
return errAbort
}
// Write sha1sum for our xz file
indexPathZstSha256 := filepath.Join(r.path, "eopkg-index.xml.zst.sha256sum.new")
indexPathZstSha256Final := filepath.Join(r.path, "eopkg-index.xml.zst.sha256sum")
mapping[indexPathZstSha256] = indexPathZstSha256Final
// Zst sha256
if errAbort = WriteSha256sum(indexPathZst, indexPathZstSha256); err != nil {
return errAbort
}
for k, v := range mapping {
if errAbort = os.Rename(k, v); errAbort != nil {
return errAbort
}
}
errAbort = purgeCloudflare(r.ID)
if errAbort != nil {
return errAbort
}
return nil
}