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Add Arch package registry (#32692)
Close #25037 Close #31037 This PR adds a Arch package registry usable with pacman.  Rewrite of #25396 and #31037. You can follow [this tutorial](https://wiki.archlinux.org/title/Creating_packages) to build a package for testing. Docs PR: https://gitea.com/gitea/docs/pulls/111 Co-authored-by: [d1nch8g@ion.lc](mailto:d1nch8g@ion.lc) Co-authored-by: @ExplodingDragon --------- Co-authored-by: dancheg97 <dancheg97@fmnx.su> Co-authored-by: dragon <ExplodingFKL@gmail.com> Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
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249
modules/packages/arch/metadata.go
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249
modules/packages/arch/metadata.go
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// Copyright 2023 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package arch
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import (
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"archive/tar"
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"bufio"
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"bytes"
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"compress/gzip"
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"io"
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"regexp"
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"strconv"
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"strings"
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"code.gitea.io/gitea/modules/util"
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"code.gitea.io/gitea/modules/validation"
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"github.com/klauspost/compress/zstd"
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"github.com/ulikunitz/xz"
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)
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const (
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PropertyRepository = "arch.repository"
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PropertyArchitecture = "arch.architecture"
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PropertySignature = "arch.signature"
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PropertyMetadata = "arch.metadata"
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SettingKeyPrivate = "arch.key.private"
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SettingKeyPublic = "arch.key.public"
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RepositoryPackage = "_arch"
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RepositoryVersion = "_repository"
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AnyArch = "any"
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)
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var (
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ErrMissingPKGINFOFile = util.NewInvalidArgumentErrorf(".PKGINFO file is missing")
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ErrUnsupportedFormat = util.NewInvalidArgumentErrorf("unsupported package container format")
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ErrInvalidName = util.NewInvalidArgumentErrorf("package name is invalid")
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ErrInvalidVersion = util.NewInvalidArgumentErrorf("package version is invalid")
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ErrInvalidArchitecture = util.NewInvalidArgumentErrorf("package architecture is invalid")
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// https://man.archlinux.org/man/PKGBUILD.5
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namePattern = regexp.MustCompile(`\A[a-zA-Z0-9@._+-]+\z`)
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versionPattern = regexp.MustCompile(`\A(?:[0-9]:)?[a-zA-Z0-9.+~]+(?:-[a-zA-Z0-9.+-~]+)?\z`)
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)
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type Package struct {
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Name string
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Version string
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VersionMetadata VersionMetadata
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FileMetadata FileMetadata
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FileCompressionExtension string
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}
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type VersionMetadata struct {
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Description string `json:"description,omitempty"`
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ProjectURL string `json:"project_url,omitempty"`
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Licenses []string `json:"licenses,omitempty"`
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}
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type FileMetadata struct {
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Architecture string `json:"architecture"`
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Base string `json:"base,omitempty"`
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InstalledSize int64 `json:"installed_size,omitempty"`
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BuildDate int64 `json:"build_date,omitempty"`
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Packager string `json:"packager,omitempty"`
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Groups []string `json:"groups,omitempty"`
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Provides []string `json:"provides,omitempty"`
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Depends []string `json:"depends,omitempty"`
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OptDepends []string `json:"opt_depends,omitempty"`
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MakeDepends []string `json:"make_depends,omitempty"`
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CheckDepends []string `json:"check_depends,omitempty"`
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XData []string `json:"xdata,omitempty"`
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Backup []string `json:"backup,omitempty"`
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Files []string `json:"files,omitempty"`
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}
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// ParsePackage parses an Arch package file
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func ParsePackage(r io.Reader) (*Package, error) {
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header := make([]byte, 10)
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n, err := util.ReadAtMost(r, header)
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if err != nil {
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return nil, err
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}
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r = io.MultiReader(bytes.NewReader(header[:n]), r)
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var inner io.Reader
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var compressionType string
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if bytes.HasPrefix(header, []byte{0x28, 0xB5, 0x2F, 0xFD}) { // zst
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zr, err := zstd.NewReader(r)
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if err != nil {
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return nil, err
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}
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defer zr.Close()
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inner = zr
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compressionType = "zst"
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} else if bytes.HasPrefix(header, []byte{0xFD, 0x37, 0x7A, 0x58, 0x5A}) { // xz
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xzr, err := xz.NewReader(r)
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if err != nil {
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return nil, err
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}
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inner = xzr
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compressionType = "xz"
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} else if bytes.HasPrefix(header, []byte{0x1F, 0x8B}) { // gz
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gzr, err := gzip.NewReader(r)
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if err != nil {
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return nil, err
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}
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defer gzr.Close()
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inner = gzr
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compressionType = "gz"
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} else {
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return nil, ErrUnsupportedFormat
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}
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var p *Package
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files := make([]string, 0, 10)
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tr := tar.NewReader(inner)
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for {
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hd, err := tr.Next()
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if err == io.EOF {
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break
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}
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if err != nil {
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return nil, err
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}
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if hd.Typeflag != tar.TypeReg {
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continue
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}
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filename := hd.FileInfo().Name()
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if filename == ".PKGINFO" {
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p, err = ParsePackageInfo(tr)
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if err != nil {
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return nil, err
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}
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} else if !strings.HasPrefix(filename, ".") {
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files = append(files, hd.Name)
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}
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}
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if p == nil {
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return nil, ErrMissingPKGINFOFile
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}
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p.FileMetadata.Files = files
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p.FileCompressionExtension = compressionType
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return p, nil
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}
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// ParsePackageInfo parses a .PKGINFO file to retrieve the metadata
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// https://man.archlinux.org/man/PKGBUILD.5
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// https://gitlab.archlinux.org/pacman/pacman/-/blob/master/lib/libalpm/be_package.c#L161
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func ParsePackageInfo(r io.Reader) (*Package, error) {
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p := &Package{}
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s := bufio.NewScanner(r)
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for s.Scan() {
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line := s.Text()
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if strings.HasPrefix(line, "#") {
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continue
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}
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i := strings.IndexRune(line, '=')
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if i == -1 {
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continue
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}
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key := strings.TrimSpace(line[:i])
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value := strings.TrimSpace(line[i+1:])
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switch key {
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case "pkgname":
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p.Name = value
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case "pkgbase":
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p.FileMetadata.Base = value
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case "pkgver":
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p.Version = value
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case "pkgdesc":
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p.VersionMetadata.Description = value
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case "url":
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p.VersionMetadata.ProjectURL = value
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case "packager":
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p.FileMetadata.Packager = value
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case "arch":
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p.FileMetadata.Architecture = value
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case "license":
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p.VersionMetadata.Licenses = append(p.VersionMetadata.Licenses, value)
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case "provides":
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p.FileMetadata.Provides = append(p.FileMetadata.Provides, value)
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case "depend":
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p.FileMetadata.Depends = append(p.FileMetadata.Depends, value)
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case "optdepend":
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p.FileMetadata.OptDepends = append(p.FileMetadata.OptDepends, value)
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case "makedepend":
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p.FileMetadata.MakeDepends = append(p.FileMetadata.MakeDepends, value)
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case "checkdepend":
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p.FileMetadata.CheckDepends = append(p.FileMetadata.CheckDepends, value)
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case "backup":
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p.FileMetadata.Backup = append(p.FileMetadata.Backup, value)
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case "group":
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p.FileMetadata.Groups = append(p.FileMetadata.Groups, value)
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case "builddate":
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date, err := strconv.ParseInt(value, 10, 64)
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if err != nil {
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return nil, err
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}
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p.FileMetadata.BuildDate = date
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case "size":
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size, err := strconv.ParseInt(value, 10, 64)
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if err != nil {
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return nil, err
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}
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p.FileMetadata.InstalledSize = size
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case "xdata":
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p.FileMetadata.XData = append(p.FileMetadata.XData, value)
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}
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}
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if err := s.Err(); err != nil {
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return nil, err
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}
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if !namePattern.MatchString(p.Name) {
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return nil, ErrInvalidName
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}
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if !versionPattern.MatchString(p.Version) {
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return nil, ErrInvalidVersion
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}
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if p.FileMetadata.Architecture == "" {
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return nil, ErrInvalidArchitecture
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}
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if !validation.IsValidURL(p.VersionMetadata.ProjectURL) {
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p.VersionMetadata.ProjectURL = ""
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}
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return p, nil
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}
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