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// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package swift
import (
"archive/zip"
"fmt"
"io"
"path"
"regexp"
"strings"
"code.gitea.io/gitea/modules/json"
"code.gitea.io/gitea/modules/util"
"code.gitea.io/gitea/modules/validation"
"github.com/hashicorp/go-version"
)
var (
ErrMissingManifestFile = util.NewInvalidArgumentErrorf("Package.swift file is missing")
ErrManifestFileTooLarge = util.NewInvalidArgumentErrorf("Package.swift file is too large")
ErrInvalidManifestVersion = util.NewInvalidArgumentErrorf("manifest version is invalid")
manifestPattern = regexp.MustCompile(`\APackage(?:@swift-(\d+(?:\.\d+)?(?:\.\d+)?))?\.swift\z`)
toolsVersionPattern = regexp.MustCompile(`\A// swift-tools-version:(\d+(?:\.\d+)?(?:\.\d+)?)`)
)
const (
maxManifestFileSize = 128 * 1024
PropertyScope = "swift.scope"
PropertyName = "swift.name"
PropertyRepositoryURL = "swift.repository_url"
)
// Package represents a Swift package
type Package struct {
RepositoryURLs []string
Metadata *Metadata
}
// Metadata represents the metadata of a Swift package
type Metadata struct {
Description string `json:"description,omitempty"`
Keywords []string `json:"keywords,omitempty"`
RepositoryURL string `json:"repository_url,omitempty"`
License string `json:"license,omitempty"`
Author Person `json:"author,omitempty"`
Manifests map[string]*Manifest `json:"manifests,omitempty"`
}
// Manifest represents a Package.swift file
type Manifest struct {
Content string `json:"content"`
ToolsVersion string `json:"tools_version,omitempty"`
}
// https://schema.org/SoftwareSourceCode
type SoftwareSourceCode struct {
Context []string `json:"@context"`
Type string `json:"@type"`
Name string `json:"name"`
Version string `json:"version"`
Description string `json:"description,omitempty"`
Keywords []string `json:"keywords,omitempty"`
CodeRepository string `json:"codeRepository,omitempty"`
License string `json:"license,omitempty"`
Author Person `json:"author"`
ProgrammingLanguage ProgrammingLanguage `json:"programmingLanguage"`
RepositoryURLs []string `json:"repositoryURLs,omitempty"`
}
// https://schema.org/ProgrammingLanguage
type ProgrammingLanguage struct {
Type string `json:"@type"`
Name string `json:"name"`
URL string `json:"url"`
}
// https://schema.org/Person
type Person struct {
Type string `json:"@type,omitempty"`
GivenName string `json:"givenName,omitempty"`
MiddleName string `json:"middleName,omitempty"`
FamilyName string `json:"familyName,omitempty"`
}
func (p Person) String() string {
var sb strings.Builder
if p.GivenName != "" {
sb.WriteString(p.GivenName)
}
if p.MiddleName != "" {
if sb.Len() > 0 {
sb.WriteRune(' ')
}
sb.WriteString(p.MiddleName)
}
if p.FamilyName != "" {
if sb.Len() > 0 {
sb.WriteRune(' ')
}
sb.WriteString(p.FamilyName)
}
return sb.String()
}
// ParsePackage parses the Swift package upload
func ParsePackage(sr io.ReaderAt, size int64, mr io.Reader) (*Package, error) {
zr, err := zip.NewReader(sr, size)
if err != nil {
return nil, err
}
p := &Package{
Metadata: &Metadata{
Manifests: make(map[string]*Manifest),
},
}
for _, file := range zr.File {
manifestMatch := manifestPattern.FindStringSubmatch(path.Base(file.Name))
if len(manifestMatch) == 0 {
continue
}
if file.UncompressedSize64 > maxManifestFileSize {
return nil, ErrManifestFileTooLarge
}
f, err := zr.Open(file.Name)
if err != nil {
return nil, err
}
content, err := io.ReadAll(f)
if err := f.Close(); err != nil {
return nil, err
}
if err != nil {
return nil, err
}
swiftVersion := ""
if len(manifestMatch) == 2 && manifestMatch[1] != "" {
v, err := version.NewSemver(manifestMatch[1])
if err != nil {
return nil, ErrInvalidManifestVersion
}
swiftVersion = TrimmedVersionString(v)
}
manifest := &Manifest{
Content: string(content),
}
toolsMatch := toolsVersionPattern.FindStringSubmatch(manifest.Content)
if len(toolsMatch) == 2 {
v, err := version.NewSemver(toolsMatch[1])
if err != nil {
return nil, ErrInvalidManifestVersion
}
manifest.ToolsVersion = TrimmedVersionString(v)
}
p.Metadata.Manifests[swiftVersion] = manifest
}
if _, found := p.Metadata.Manifests[""]; !found {
return nil, ErrMissingManifestFile
}
if mr != nil {
var ssc *SoftwareSourceCode
if err := json.NewDecoder(mr).Decode(&ssc); err != nil {
return nil, err
}
p.Metadata.Description = ssc.Description
p.Metadata.Keywords = ssc.Keywords
p.Metadata.License = ssc.License
p.Metadata.Author = Person{
GivenName: ssc.Author.GivenName,
MiddleName: ssc.Author.MiddleName,
FamilyName: ssc.Author.FamilyName,
}
p.Metadata.RepositoryURL = ssc.CodeRepository
if !validation.IsValidURL(p.Metadata.RepositoryURL) {
p.Metadata.RepositoryURL = ""
}
p.RepositoryURLs = ssc.RepositoryURLs
}
return p, nil
}
// TrimmedVersionString returns the version string without the patch segment if it is zero
func TrimmedVersionString(v *version.Version) string {
segments := v.Segments64()
var b strings.Builder
fmt.Fprintf(&b, "%d.%d", segments[0], segments[1])
if segments[2] != 0 {
fmt.Fprintf(&b, ".%d", segments[2])
}
return b.String()
}
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