mirror of
https://github.com/aptly-dev/aptly.git
synced 2026-06-04 05:10:40 +00:00
Harald Sitter
00bb0ca8f3
the logic here was wrong.
if we managed to find the link target (the physical index file) pointed to
by our old symlink we want to remove it (this is basically "cleaning up old
index" logic).
previously we'd try to only delete it when the ReadLink came back with
error. which had two serious issues with it:
a) linkTarget was empty, so we basically called Remove("") which would
delete the storage -> root <- directory if the root is a symlink!
b) we'd leak old indexes as the cleanup logic only ran if there was en
error which would ordinarily never be
new code correctly cleans up unless there was an error.
this relates to a previous bugfix of readLink which incorrectly returned
absolute paths ultimately rendering the Remove call also broken.
375 lines
10 KiB
Go
375 lines
10 KiB
Go
package deb
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import (
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"bufio"
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"fmt"
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"os"
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"path"
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"path/filepath"
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"strings"
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"github.com/smira/aptly/aptly"
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"github.com/smira/aptly/pgp"
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"github.com/smira/aptly/utils"
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)
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type indexFiles struct {
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publishedStorage aptly.PublishedStorage
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basePath string
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renameMap map[string]string
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generatedFiles map[string]utils.ChecksumInfo
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tempDir string
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suffix string
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indexes map[string]*indexFile
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acquireByHash bool
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}
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type indexFile struct {
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parent *indexFiles
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discardable bool
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compressable bool
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onlyGzip bool
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signable bool
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acquireByHash bool
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relativePath string
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tempFilename string
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tempFile *os.File
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w *bufio.Writer
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}
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func (file *indexFile) BufWriter() (*bufio.Writer, error) {
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if file.w == nil {
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var err error
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file.tempFilename = filepath.Join(file.parent.tempDir, strings.Replace(file.relativePath, "/", "_", -1))
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file.tempFile, err = os.Create(file.tempFilename)
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if err != nil {
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return nil, fmt.Errorf("unable to create temporary index file: %s", err)
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}
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file.w = bufio.NewWriter(file.tempFile)
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}
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return file.w, nil
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}
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func (file *indexFile) Finalize(signer pgp.Signer) error {
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if file.w == nil {
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if file.discardable {
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return nil
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}
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file.BufWriter()
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}
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err := file.w.Flush()
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if err != nil {
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file.tempFile.Close()
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return fmt.Errorf("unable to write to index file: %s", err)
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}
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if file.compressable {
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err = utils.CompressFile(file.tempFile, file.onlyGzip)
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if err != nil {
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file.tempFile.Close()
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return fmt.Errorf("unable to compress index file: %s", err)
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}
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}
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file.tempFile.Close()
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exts := []string{""}
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if file.compressable {
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exts = append(exts, ".gz", ".bz2")
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if file.onlyGzip {
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exts = []string{".gz"}
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}
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}
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for _, ext := range exts {
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var checksumInfo utils.ChecksumInfo
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checksumInfo, err = utils.ChecksumsForFile(file.tempFilename + ext)
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if err != nil {
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return fmt.Errorf("unable to collect checksums: %s", err)
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}
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file.parent.generatedFiles[file.relativePath+ext] = checksumInfo
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}
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filedir := filepath.Dir(filepath.Join(file.parent.basePath, file.relativePath))
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err = file.parent.publishedStorage.MkDir(filedir)
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if err != nil {
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return fmt.Errorf("unable to create dir: %s", err)
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}
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if file.acquireByHash {
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for _, hash := range []string{"MD5Sum", "SHA1", "SHA256", "SHA512"} {
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err = file.parent.publishedStorage.MkDir(filepath.Join(filedir, "by-hash", hash))
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if err != nil {
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return fmt.Errorf("unable to create dir: %s", err)
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}
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}
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}
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for _, ext := range exts {
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err = file.parent.publishedStorage.PutFile(filepath.Join(file.parent.basePath, file.relativePath+file.parent.suffix+ext),
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file.tempFilename+ext)
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if err != nil {
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return fmt.Errorf("unable to publish file: %s", err)
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}
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if file.parent.suffix != "" {
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file.parent.renameMap[filepath.Join(file.parent.basePath, file.relativePath+file.parent.suffix+ext)] =
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filepath.Join(file.parent.basePath, file.relativePath+ext)
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}
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if file.acquireByHash {
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sums := file.parent.generatedFiles[file.relativePath+ext]
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for hash, sum := range map[string]string{"SHA512": sums.SHA512, "SHA256": sums.SHA256, "SHA1": sums.SHA1, "MD5Sum": sums.MD5} {
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err = packageIndexByHash(file, ext, hash, sum)
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if err != nil {
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return fmt.Errorf("unable to build hash file: %s", err)
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}
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}
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}
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}
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if file.signable && signer != nil {
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err = signer.DetachedSign(file.tempFilename, file.tempFilename+".gpg")
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if err != nil {
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return fmt.Errorf("unable to detached sign file: %s", err)
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}
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err = signer.ClearSign(file.tempFilename, filepath.Join(filepath.Dir(file.tempFilename), "In"+filepath.Base(file.tempFilename)))
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if err != nil {
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return fmt.Errorf("unable to clearsign file: %s", err)
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}
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if file.parent.suffix != "" {
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file.parent.renameMap[filepath.Join(file.parent.basePath, file.relativePath+file.parent.suffix+".gpg")] =
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filepath.Join(file.parent.basePath, file.relativePath+".gpg")
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file.parent.renameMap[filepath.Join(file.parent.basePath, "In"+file.relativePath+file.parent.suffix)] =
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filepath.Join(file.parent.basePath, "In"+file.relativePath)
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}
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err = file.parent.publishedStorage.PutFile(filepath.Join(file.parent.basePath, file.relativePath+file.parent.suffix+".gpg"),
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file.tempFilename+".gpg")
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if err != nil {
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return fmt.Errorf("unable to publish file: %s", err)
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}
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err = file.parent.publishedStorage.PutFile(filepath.Join(file.parent.basePath, "In"+file.relativePath+file.parent.suffix),
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filepath.Join(filepath.Dir(file.tempFilename), "In"+filepath.Base(file.tempFilename)))
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if err != nil {
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return fmt.Errorf("unable to publish file: %s", err)
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}
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}
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return nil
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}
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func packageIndexByHash(file *indexFile, ext string, hash string, sum string) error {
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src := filepath.Join(file.parent.basePath, file.relativePath)
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indexfile := path.Base(src + ext)
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src = src + file.parent.suffix + ext
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filedir := filepath.Dir(filepath.Join(file.parent.basePath, file.relativePath))
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dst := filepath.Join(filedir, "by-hash", hash)
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sumfilePath := filepath.Join(dst, sum)
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// link already exists? do nothing
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exists, err := file.parent.publishedStorage.FileExists(sumfilePath)
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if err != nil {
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return fmt.Errorf("Acquire-By-Hash: error checking exists of file %s: %s", sumfilePath, err)
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}
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if exists {
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return nil
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}
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// create the link
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err = file.parent.publishedStorage.HardLink(src, sumfilePath)
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if err != nil {
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return fmt.Errorf("Acquire-By-Hash: error creating hardlink %s: %s", sumfilePath, err)
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}
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// if a previous index file already exists exists, backup symlink
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indexPath := filepath.Join(dst, indexfile)
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oldIndexPath := filepath.Join(dst, indexfile+".old")
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if exists, _ = file.parent.publishedStorage.FileExists(indexPath); exists {
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// if exists, remove old symlink
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if exists, _ = file.parent.publishedStorage.FileExists(oldIndexPath); exists {
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var linkTarget string
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linkTarget, err = file.parent.publishedStorage.ReadLink(oldIndexPath)
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if err == nil {
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// If we managed to resolve the link target: delete it. This is the
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// oldest physical index file we no longer need. Once we drop our
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// old symlink we'll essentially forget about it existing at all.
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file.parent.publishedStorage.Remove(linkTarget)
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}
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file.parent.publishedStorage.Remove(oldIndexPath)
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}
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file.parent.publishedStorage.RenameFile(indexPath, oldIndexPath)
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}
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// create symlink
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err = file.parent.publishedStorage.SymLink(filepath.Join(dst, sum), filepath.Join(dst, indexfile))
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if err != nil {
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return fmt.Errorf("Acquire-By-Hash: error creating symlink %s: %s", filepath.Join(dst, indexfile), err)
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}
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return nil
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}
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func newIndexFiles(publishedStorage aptly.PublishedStorage, basePath, tempDir, suffix string, acquireByHash bool) *indexFiles {
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return &indexFiles{
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publishedStorage: publishedStorage,
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basePath: basePath,
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renameMap: make(map[string]string),
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generatedFiles: make(map[string]utils.ChecksumInfo),
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tempDir: tempDir,
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suffix: suffix,
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indexes: make(map[string]*indexFile),
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acquireByHash: acquireByHash,
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}
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}
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func (files *indexFiles) PackageIndex(component, arch string, udeb bool) *indexFile {
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if arch == ArchitectureSource {
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udeb = false
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}
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key := fmt.Sprintf("pi-%s-%s-%v", component, arch, udeb)
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file, ok := files.indexes[key]
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if !ok {
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var relativePath string
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if arch == ArchitectureSource {
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relativePath = filepath.Join(component, "source", "Sources")
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} else {
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if udeb {
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relativePath = filepath.Join(component, "debian-installer", fmt.Sprintf("binary-%s", arch), "Packages")
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} else {
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relativePath = filepath.Join(component, fmt.Sprintf("binary-%s", arch), "Packages")
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}
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}
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file = &indexFile{
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parent: files,
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discardable: false,
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compressable: true,
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signable: false,
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acquireByHash: files.acquireByHash,
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relativePath: relativePath,
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}
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files.indexes[key] = file
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}
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return file
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}
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func (files *indexFiles) ReleaseIndex(component, arch string, udeb bool) *indexFile {
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if arch == ArchitectureSource {
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udeb = false
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}
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key := fmt.Sprintf("ri-%s-%s-%v", component, arch, udeb)
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file, ok := files.indexes[key]
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if !ok {
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var relativePath string
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if arch == ArchitectureSource {
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relativePath = filepath.Join(component, "source", "Release")
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} else {
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if udeb {
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relativePath = filepath.Join(component, "debian-installer", fmt.Sprintf("binary-%s", arch), "Release")
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} else {
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relativePath = filepath.Join(component, fmt.Sprintf("binary-%s", arch), "Release")
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}
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}
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file = &indexFile{
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parent: files,
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discardable: udeb,
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compressable: false,
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signable: false,
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acquireByHash: files.acquireByHash,
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relativePath: relativePath,
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}
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files.indexes[key] = file
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}
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return file
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}
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func (files *indexFiles) ContentsIndex(component, arch string, udeb bool) *indexFile {
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if arch == ArchitectureSource {
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udeb = false
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}
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key := fmt.Sprintf("ci-%s-%s-%v", component, arch, udeb)
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file, ok := files.indexes[key]
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if !ok {
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var relativePath string
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if udeb {
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relativePath = filepath.Join(component, fmt.Sprintf("Contents-udeb-%s", arch))
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} else {
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relativePath = filepath.Join(component, fmt.Sprintf("Contents-%s", arch))
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}
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file = &indexFile{
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parent: files,
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discardable: true,
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compressable: true,
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onlyGzip: true,
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signable: false,
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acquireByHash: files.acquireByHash,
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relativePath: relativePath,
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}
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files.indexes[key] = file
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}
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return file
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}
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func (files *indexFiles) ReleaseFile() *indexFile {
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return &indexFile{
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parent: files,
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discardable: false,
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compressable: false,
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signable: true,
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relativePath: "Release",
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}
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}
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func (files *indexFiles) FinalizeAll(progress aptly.Progress) (err error) {
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if progress != nil {
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progress.InitBar(int64(len(files.indexes)), false)
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defer progress.ShutdownBar()
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}
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for _, file := range files.indexes {
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err = file.Finalize(nil)
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if err != nil {
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return
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}
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if progress != nil {
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progress.AddBar(1)
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}
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}
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files.indexes = make(map[string]*indexFile)
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return
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}
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func (files *indexFiles) RenameFiles() error {
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var err error
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for oldName, newName := range files.renameMap {
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err = files.publishedStorage.RenameFile(oldName, newName)
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if err != nil {
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return fmt.Errorf("unable to rename: %s", err)
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}
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}
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return nil
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}
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