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// Copyright 2021 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package composer
import (
"archive/zip"
"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"
)
// TypeProperty is the name of the property for Composer package types
const TypeProperty = "composer.type"
var (
// ErrMissingComposerFile indicates a missing composer.json file
ErrMissingComposerFile = util.NewInvalidArgumentErrorf("composer.json file is missing")
// ErrInvalidName indicates an invalid package name
ErrInvalidName = util.NewInvalidArgumentErrorf("package name is invalid")
// ErrInvalidVersion indicates an invalid package version
ErrInvalidVersion = util.NewInvalidArgumentErrorf("package version is invalid")
)
// Package represents a Composer package
type Package struct {
Name string
Version string
Type string
Metadata *Metadata
}
// https://getcomposer.org/doc/04-schema.md
// Metadata represents the metadata of a Composer package
type Metadata struct {
Description string `json:"description,omitempty"`
Readme string `json:"readme,omitempty"`
Keywords []string `json:"keywords,omitempty"`
Comments Comments `json:"_comments,omitempty"`
Homepage string `json:"homepage,omitempty"`
License Licenses `json:"license,omitempty"`
Authors []Author `json:"authors,omitempty"`
Bin []string `json:"bin,omitempty"`
Autoload map[string]any `json:"autoload,omitempty"`
AutoloadDev map[string]any `json:"autoload-dev,omitempty"`
Extra map[string]any `json:"extra,omitempty"`
Require map[string]string `json:"require,omitempty"`
RequireDev map[string]string `json:"require-dev,omitempty"`
Suggest map[string]string `json:"suggest,omitempty"`
Provide map[string]string `json:"provide,omitempty"`
}
// Licenses represents the licenses of a Composer package
type Licenses []string
// UnmarshalJSON reads from a string or array
func (l *Licenses) UnmarshalJSON(data []byte) error {
switch data[0] {
case '"':
var value string
if err := json.Unmarshal(data, &value); err != nil {
return err
}
*l = Licenses{value}
case '[':
values := make([]string, 0, 5)
if err := json.Unmarshal(data, &values); err != nil {
return err
}
*l = Licenses(values)
}
return nil
}
// Comments represents the comments of a Composer package
type Comments []string
// UnmarshalJSON reads from a string or array
func (c *Comments) UnmarshalJSON(data []byte) error {
switch data[0] {
case '"':
var value string
if err := json.Unmarshal(data, &value); err != nil {
return err
}
*c = Comments{value}
case '[':
values := make([]string, 0, 5)
if err := json.Unmarshal(data, &values); err != nil {
return err
}
*c = Comments(values)
}
return nil
}
// Author represents an author
type Author struct {
Name string `json:"name,omitempty"`
Email string `json:"email,omitempty"`
Homepage string `json:"homepage,omitempty"`
}
var nameMatch = regexp.MustCompile(`\A[a-z0-9]([_\.-]?[a-z0-9]+)*/[a-z0-9](([_\.]?|-{0,2})[a-z0-9]+)*\z`)
// ParsePackage parses the metadata of a Composer package file
func ParsePackage(r io.ReaderAt, size int64) (*Package, error) {
archive, err := zip.NewReader(r, size)
if err != nil {
return nil, err
}
for _, file := range archive.File {
if strings.Count(file.Name, "/") > 1 {
continue
}
if strings.HasSuffix(strings.ToLower(file.Name), "composer.json") {
f, err := archive.Open(file.Name)
if err != nil {
return nil, err
}
defer f.Close()
return ParseComposerFile(archive, path.Dir(file.Name), f)
}
}
return nil, ErrMissingComposerFile
}
// ParseComposerFile parses a composer.json file to retrieve the metadata of a Composer package
func ParseComposerFile(archive *zip.Reader, pathPrefix string, r io.Reader) (*Package, error) {
var cj struct {
Name string `json:"name"`
Version string `json:"version"`
Type string `json:"type"`
Metadata
}
if err := json.NewDecoder(r).Decode(&cj); err != nil {
return nil, err
}
if !nameMatch.MatchString(cj.Name) {
return nil, ErrInvalidName
}
if cj.Version != "" {
if _, err := version.NewSemver(cj.Version); err != nil {
return nil, ErrInvalidVersion
}
}
if !validation.IsValidURL(cj.Homepage) {
cj.Homepage = ""
}
if cj.Type == "" {
cj.Type = "library"
}
if cj.Readme == "" {
cj.Readme = "README.md"
}
f, err := archive.Open(path.Join(pathPrefix, cj.Readme))
if err == nil {
// 10kb limit for readme content
buf, _ := io.ReadAll(io.LimitReader(f, 10*1024))
cj.Readme = string(buf)
_ = f.Close()
} else {
cj.Readme = ""
}
return &Package{
Name: cj.Name,
Version: cj.Version,
Type: cj.Type,
Metadata: &cj.Metadata,
}, nil
}
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