Add Alpine package registry (#23714)

This PR adds an Alpine package registry. You can follow [this tutorial](https://wiki.alpinelinux.org/wiki/Creating_an_Alpine_package) to build a *.apk package for testing. This functionality is similar to the Debian registry (#22854) and therefore shares some methods. I marked this PR as blocked because it should be merged after #22854. ![grafik](https://user-images.githubusercontent.com/1666336/227779595-b76163aa-eea1-4a79-9583-775c24ad74e8.png) --------- Co-authored-by: techknowlogick <techknowlogick@gitea.io> Co-authored-by: silverwind <me@silverwind.io> Co-authored-by: Giteabot <teabot@gitea.io>
2024-12-29 20:53:10 +00:00 · 2023-05-12 19:27:50 +02:00 · 2023-05-12 19:27:50 +02:00 · 9173e079ae
commit 9173e079ae
parent 80bde0141b
30 changed files with 1631 additions and 52 deletions
--- a/custom/conf/app.example.ini
+++ b/custom/conf/app.example.ini
@ -2442,6 +2442,8 @@ ROUTER = console
 ;LIMIT_TOTAL_OWNER_COUNT = -1
 ;; Maximum size of packages a single owner can use (`-1` means no limits, format `1000`, `1 MB`, `1 GiB`)
 ;LIMIT_TOTAL_OWNER_SIZE = -1
+;; Maximum size of an Alpine upload (`-1` means no limits, format `1000`, `1 MB`, `1 GiB`)
+;LIMIT_SIZE_ALPINE = -1
 ;; Maximum size of a Cargo upload (`-1` means no limits, format `1000`, `1 MB`, `1 GiB`)
 ;LIMIT_SIZE_CARGO = -1
 ;; Maximum size of a Chef upload (`-1` means no limits, format `1000`, `1 MB`, `1 GiB`)
--- a/docs/content/doc/administration/config-cheat-sheet.en-us.md
+++ b/docs/content/doc/administration/config-cheat-sheet.en-us.md
@ -1213,6 +1213,7 @@ Task queue configuration has been moved to `queue.task`. However, the below conf
 - `CHUNKED_UPLOAD_PATH`: **tmp/package-upload**: Path for chunked uploads. Defaults to `APP_DATA_PATH` + `tmp/package-upload`
 - `LIMIT_TOTAL_OWNER_COUNT`: **-1**: Maximum count of package versions a single owner can have (`-1` means no limits)
 - `LIMIT_TOTAL_OWNER_SIZE`: **-1**: Maximum size of packages a single owner can use (`-1` means no limits, format `1000`, `1 MB`, `1 GiB`)
+- `LIMIT_SIZE_ALPINE`: **-1**: Maximum size of an Alpine upload (`-1` means no limits, format `1000`, `1 MB`, `1 GiB`)
 - `LIMIT_SIZE_CARGO`: **-1**: Maximum size of a Cargo upload (`-1` means no limits, format `1000`, `1 MB`, `1 GiB`)
 - `LIMIT_SIZE_CHEF`: **-1**: Maximum size of a Chef upload (`-1` means no limits, format `1000`, `1 MB`, `1 GiB`)
 - `LIMIT_SIZE_COMPOSER`: **-1**: Maximum size of a Composer upload (`-1` means no limits, format `1000`, `1 MB`, `1 GiB`)
--- a/docs/content/doc/usage/packages/alpine.en-us.md
+++ b/docs/content/doc/usage/packages/alpine.en-us.md
@ -0,0 +1,133 @@
+---
+date: "2023-03-25T00:00:00+00:00"
+title: "Alpine Packages Repository"
+slug: "packages/alpine"
+draft: false
+toc: false
+menu:
+  sidebar:
+    parent: "packages"
+    name: "Alpine"
+    weight: 4
+    identifier: "alpine"
+---
+
+# Alpine Packages Repository
+
+Publish [Alpine](https://pkgs.alpinelinux.org/) packages for your user or organization.
+
+**Table of Contents**
+
+{{< toc >}}
+
+## Requirements
+
+To work with the Alpine registry, you need to use a HTTP client like `curl` to upload and a package manager like `apk` to consume packages.
+
+The following examples use `apk`.
+
+## Configuring the package registry
+
+To register the Alpine registry add the url to the list of known apk sources (`/etc/apk/repositories`):
+
+```
+https://gitea.example.com/api/packages/{owner}/alpine/<branch>/<repository>
+```
+
+| Placeholder  | Description |
+| ------------ | ----------- |
+| `owner`      | The owner of the packages. |
+| `branch`     | The branch to use. |
+| `repository` | The repository to use. |
+
+If the registry is private, provide credentials in the url. You can use a password or a [personal access token]({{< relref "doc/development/api-usage.en-us.md#authentication" >}}):
+
+```
+https://{username}:{your_password_or_token}@gitea.example.com/api/packages/{owner}/alpine/<branch>/<repository>
+```
+
+The Alpine registry files are signed with a RSA key which must be known to apk. Download the public key and store it in `/etc/apk/keys/`:
+
+```shell
+curl -JO https://gitea.example.com/api/packages/{owner}/alpine/key
+```
+
+Afterwards update the local package index:
+
+```shell
+apk update
+```
+
+## Publish a package
+
+To publish an Alpine package (`*.apk`), perform a HTTP `PUT` operation with the package content in the request body.
+
+```
+PUT https://gitea.example.com/api/packages/{owner}/alpine/{branch}/{repository}
+```
+
+| Parameter    | Description |
+| ------------ | ----------- |
+| `owner`      | The owner of the package. |
+| `branch`     | The branch may match the release version of the OS, ex: `v3.17`. |
+| `repository` | The repository can be used [to group packages](https://wiki.alpinelinux.org/wiki/Repositories) or just `main` or similar. |
+
+Example request using HTTP Basic authentication:
+
+```shell
+curl --user your_username:your_password_or_token \
+     --upload-file path/to/file.apk \
+     https://gitea.example.com/api/packages/testuser/alpine/v3.17/main
+```
+
+If you are using 2FA or OAuth use a [personal access token]({{< relref "doc/development/api-usage.en-us.md#authentication" >}}) instead of the password.
+You cannot publish a file with the same name twice to a package. You must delete the existing package file first.
+
+The server responds with the following HTTP Status codes.
+
+| HTTP Status Code  | Meaning |
+| ----------------- | ------- |
+| `201 Created`     | The package has been published. |
+| `400 Bad Request` | The package name, version, branch, repository or architecture are invalid. |
+| `409 Conflict`    | A package file with the same combination of parameters exist already in the package. |
+
+## Delete a package
+
+To delete an Alpine package perform a HTTP `DELETE` operation. This will delete the package version too if there is no file left.
+
+```
+DELETE https://gitea.example.com/api/packages/{owner}/alpine/{branch}/{repository}/{architecture}/{filename}
+```
+
+| Parameter      | Description |
+| -------------- | ----------- |
+| `owner`        | The owner of the package. |
+| `branch`       | The branch to use. |
+| `repository`   | The repository to use. |
+| `architecture` | The package architecture. |
+| `filename`     | The file to delete.
+
+Example request using HTTP Basic authentication:
+
+```shell
+curl --user your_username:your_token_or_password -X DELETE \
+     https://gitea.example.com/api/packages/testuser/alpine/v3.17/main/test-package-1.0.0.apk
+```
+
+The server responds with the following HTTP Status codes.
+
+| HTTP Status Code  | Meaning |
+| ----------------- | ------- |
+| `204 No Content`  | Success |
+| `404 Not Found`   | The package or file was not found. |
+
+## Install a package
+
+To install a package from the Alpine registry, execute the following commands:
+
+```shell
+# use latest version
+apk add {package_name}
+# use specific version
+apk add {package_name}={package_version}
+```
--- a/docs/content/doc/usage/packages/overview.en-us.md
+++ b/docs/content/doc/usage/packages/overview.en-us.md
@ -27,6 +27,7 @@ The following package managers are currently supported:

 | Name | Language | Package client |
 | ---- | -------- | -------------- |
+| [Alpine]({{< relref "doc/usage/packages/alpine.en-us.md" >}}) | - | `apk` |
 | [Cargo]({{< relref "doc/usage/packages/cargo.en-us.md" >}}) | Rust | `cargo` |
 | [Chef]({{< relref "doc/usage/packages/chef.en-us.md" >}}) | - | `knife` |
 | [Composer]({{< relref "doc/usage/packages/composer.en-us.md" >}}) | PHP | `composer` |
--- a/docs/content/doc/usage/packages/storage.en-us.md
+++ b/docs/content/doc/usage/packages/storage.en-us.md
@ -9,7 +9,7 @@ menu:
  sidebar:
    parent: "packages"
    name: "Storage"
-    weight: 5
+    weight: 2
    identifier: "storage"
 ---

--- a/models/packages/alpine/search.go
+++ b/models/packages/alpine/search.go
@ -0,0 +1,53 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package alpine
+
+import (
+	"context"
+
+	packages_model "code.gitea.io/gitea/models/packages"
+	alpine_module "code.gitea.io/gitea/modules/packages/alpine"
+)
+
+// GetBranches gets all available branches
+func GetBranches(ctx context.Context, ownerID int64) ([]string, error) {
+	return packages_model.GetDistinctPropertyValues(
+		ctx,
+		packages_model.TypeAlpine,
+		ownerID,
+		packages_model.PropertyTypeFile,
+		alpine_module.PropertyBranch,
+		nil,
+	)
+}
+
+// GetRepositories gets all available repositories for the given branch
+func GetRepositories(ctx context.Context, ownerID int64, branch string) ([]string, error) {
+	return packages_model.GetDistinctPropertyValues(
+		ctx,
+		packages_model.TypeAlpine,
+		ownerID,
+		packages_model.PropertyTypeFile,
+		alpine_module.PropertyRepository,
+		&packages_model.DistinctPropertyDependency{
+			Name:  alpine_module.PropertyBranch,
+			Value: branch,
+		},
+	)
+}
+
+// GetArchitectures gets all available architectures for the given repository
+func GetArchitectures(ctx context.Context, ownerID int64, repository string) ([]string, error) {
+	return packages_model.GetDistinctPropertyValues(
+		ctx,
+		packages_model.TypeAlpine,
+		ownerID,
+		packages_model.PropertyTypeFile,
+		alpine_module.PropertyArchitecture,
+		&packages_model.DistinctPropertyDependency{
+			Name:  alpine_module.PropertyRepository,
+			Value: repository,
+		},
+	)
+}
--- a/models/packages/debian/search.go
+++ b/models/packages/debian/search.go
@ -88,44 +88,42 @@ func SearchLatestPackages(ctx context.Context, opts *PackageSearchOptions) ([]*p

 // GetDistributions gets all available distributions
 func GetDistributions(ctx context.Context, ownerID int64) ([]string, error) {
-	return getDistinctPropertyValues(ctx, ownerID, "", debian_module.PropertyDistribution)
+	return packages.GetDistinctPropertyValues(
+		ctx,
+		packages.TypeDebian,
+		ownerID,
+		packages.PropertyTypeFile,
+		debian_module.PropertyDistribution,
+		nil,
+	)
 }

 // GetComponents gets all available components for the given distribution
 func GetComponents(ctx context.Context, ownerID int64, distribution string) ([]string, error) {
-	return getDistinctPropertyValues(ctx, ownerID, distribution, debian_module.PropertyComponent)
+	return packages.GetDistinctPropertyValues(
+		ctx,
+		packages.TypeDebian,
+		ownerID,
+		packages.PropertyTypeFile,
+		debian_module.PropertyComponent,
+		&packages.DistinctPropertyDependency{
+			Name:  debian_module.PropertyDistribution,
+			Value: distribution,
+		},
+	)
 }

 // GetArchitectures gets all available architectures for the given distribution
 func GetArchitectures(ctx context.Context, ownerID int64, distribution string) ([]string, error) {
-	return getDistinctPropertyValues(ctx, ownerID, distribution, debian_module.PropertyArchitecture)
-}
-
-func getDistinctPropertyValues(ctx context.Context, ownerID int64, distribution, propName string) ([]string, error) {
-	var cond builder.Cond = builder.Eq{
-		"package_property.ref_type": packages.PropertyTypeFile,
-		"package_property.name":     propName,
-		"package.type":              packages.TypeDebian,
-		"package.owner_id":          ownerID,
-	}
-	if distribution != "" {
-		innerCond := builder.
-			Expr("pp.ref_id = package_property.ref_id").
-			And(builder.Eq{
-				"pp.ref_type": packages.PropertyTypeFile,
-				"pp.name":     debian_module.PropertyDistribution,
-				"pp.value":    distribution,
-			})
-		cond = cond.And(builder.Exists(builder.Select("pp.ref_id").From("package_property pp").Where(innerCond)))
-	}
-
-	values := make([]string, 0, 5)
-	return values, db.GetEngine(ctx).
-		Table("package_property").
-		Distinct("package_property.value").
-		Join("INNER", "package_file", "package_file.id = package_property.ref_id").
-		Join("INNER", "package_version", "package_version.id = package_file.version_id").
-		Join("INNER", "package", "package.id = package_version.package_id").
-		Where(cond).
-		Find(&values)
+	return packages.GetDistinctPropertyValues(
+		ctx,
+		packages.TypeDebian,
+		ownerID,
+		packages.PropertyTypeFile,
+		debian_module.PropertyArchitecture,
+		&packages.DistinctPropertyDependency{
+			Name:  debian_module.PropertyDistribution,
+			Value: distribution,
+		},
+	)
 }
--- a/models/packages/descriptor.go
+++ b/models/packages/descriptor.go
@ -12,6 +12,7 @@ import (
 	repo_model "code.gitea.io/gitea/models/repo"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/json"
+	"code.gitea.io/gitea/modules/packages/alpine"
 	"code.gitea.io/gitea/modules/packages/cargo"
 	"code.gitea.io/gitea/modules/packages/chef"
 	"code.gitea.io/gitea/modules/packages/composer"
@ -136,6 +137,8 @@ func GetPackageDescriptor(ctx context.Context, pv *PackageVersion) (*PackageDesc

 	var metadata interface{}
 	switch p.Type {
+	case TypeAlpine:
+		metadata = &alpine.VersionMetadata{}
 	case TypeCargo:
 		metadata = &cargo.Metadata{}
 	case TypeChef:
--- a/models/packages/package.go
+++ b/models/packages/package.go
@ -30,6 +30,7 @@ type Type string

 // List of supported packages
 const (
+	TypeAlpine    Type = "alpine"
 	TypeCargo     Type = "cargo"
 	TypeChef      Type = "chef"
 	TypeComposer  Type = "composer"
@ -51,6 +52,7 @@ const (
 )

 var TypeList = []Type{
+	TypeAlpine,
 	TypeCargo,
 	TypeChef,
 	TypeComposer,
@ -74,6 +76,8 @@ var TypeList = []Type{
 // Name gets the name of the package type
 func (pt Type) Name() string {
 	switch pt {
+	case TypeAlpine:
+		return "Alpine"
 	case TypeCargo:
 		return "Cargo"
 	case TypeChef:
@ -117,6 +121,8 @@ func (pt Type) Name() string {
 // SVGName gets the name of the package type svg image
 func (pt Type) SVGName() string {
 	switch pt {
+	case TypeAlpine:
+		return "gitea-alpine"
 	case TypeCargo:
 		return "gitea-cargo"
 	case TypeChef:
--- a/models/packages/package_property.go
+++ b/models/packages/package_property.go
@ -7,6 +7,8 @@ import (
 	"context"

 	"code.gitea.io/gitea/models/db"
+
+	"xorm.io/builder"
 )

 func init() {
@ -81,3 +83,39 @@ func DeletePropertyByName(ctx context.Context, refType PropertyType, refID int64
 	_, err := db.GetEngine(ctx).Where("ref_type = ? AND ref_id = ? AND name = ?", refType, refID, name).Delete(&PackageProperty{})
 	return err
 }
+
+type DistinctPropertyDependency struct {
+	Name  string
+	Value string
+}
+
+// GetDistinctPropertyValues returns all distinct property values for a given type.
+// Optional: Search only in dependence of another property.
+func GetDistinctPropertyValues(ctx context.Context, packageType Type, ownerID int64, refType PropertyType, propertyName string, dep *DistinctPropertyDependency) ([]string, error) {
+	var cond builder.Cond = builder.Eq{
+		"package_property.ref_type": refType,
+		"package_property.name":     propertyName,
+		"package.type":              packageType,
+		"package.owner_id":          ownerID,
+	}
+	if dep != nil {
+		innerCond := builder.
+			Expr("pp.ref_id = package_property.ref_id").
+			And(builder.Eq{
+				"pp.ref_type": refType,
+				"pp.name":     dep.Name,
+				"pp.value":    dep.Value,
+			})
+		cond = cond.And(builder.Exists(builder.Select("pp.ref_id").From("package_property pp").Where(innerCond)))
+	}
+
+	values := make([]string, 0, 5)
+	return values, db.GetEngine(ctx).
+		Table("package_property").
+		Distinct("package_property.value").
+		Join("INNER", "package_file", "package_file.id = package_property.ref_id").
+		Join("INNER", "package_version", "package_version.id = package_file.version_id").
+		Join("INNER", "package", "package.id = package_version.package_id").
+		Where(cond).
+		Find(&values)
+}
--- a/modules/packages/alpine/metadata.go
+++ b/modules/packages/alpine/metadata.go
@ -0,0 +1,236 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package alpine
+
+import (
+	"archive/tar"
+	"bufio"
+	"compress/gzip"
+	"crypto/sha1"
+	"encoding/base64"
+	"io"
+	"strconv"
+	"strings"
+
+	"code.gitea.io/gitea/modules/util"
+	"code.gitea.io/gitea/modules/validation"
+)
+
+var (
+	ErrMissingPKGINFOFile = util.NewInvalidArgumentErrorf("PKGINFO file is missing")
+	ErrInvalidName        = util.NewInvalidArgumentErrorf("package name is invalid")
+	ErrInvalidVersion     = util.NewInvalidArgumentErrorf("package version is invalid")
+)
+
+const (
+	PropertyMetadata     = "alpine.metadata"
+	PropertyBranch       = "alpine.branch"
+	PropertyRepository   = "alpine.repository"
+	PropertyArchitecture = "alpine.architecture"
+
+	SettingKeyPrivate = "alpine.key.private"
+	SettingKeyPublic  = "alpine.key.public"
+
+	RepositoryPackage = "_alpine"
+	RepositoryVersion = "_repository"
+)
+
+// https://wiki.alpinelinux.org/wiki/Apk_spec
+
+// Package represents an Alpine package
+type Package struct {
+	Name            string
+	Version         string
+	VersionMetadata VersionMetadata
+	FileMetadata    FileMetadata
+}
+
+// Metadata of an Alpine package
+type VersionMetadata struct {
+	Description string `json:"description,omitempty"`
+	License     string `json:"license,omitempty"`
+	ProjectURL  string `json:"project_url,omitempty"`
+	Maintainer  string `json:"maintainer,omitempty"`
+}
+
+type FileMetadata struct {
+	Checksum     string   `json:"checksum"`
+	Packager     string   `json:"packager,omitempty"`
+	BuildDate    int64    `json:"build_date,omitempty"`
+	Size         int64    `json:"size,omitempty"`
+	Architecture string   `json:"architecture,omitempty"`
+	Origin       string   `json:"origin,omitempty"`
+	CommitHash   string   `json:"commit_hash,omitempty"`
+	InstallIf    string   `json:"install_if,omitempty"`
+	Provides     []string `json:"provides,omitempty"`
+	Dependencies []string `json:"dependencies,omitempty"`
+}
+
+// ParsePackage parses the Alpine package file
+func ParsePackage(r io.Reader) (*Package, error) {
+	// Alpine packages are concated .tar.gz streams. Usually the first stream contains the package metadata.
+
+	br := bufio.NewReader(r) // needed for gzip Multistream
+
+	h := sha1.New()
+
+	gzr, err := gzip.NewReader(&teeByteReader{br, h})
+	if err != nil {
+		return nil, err
+	}
+	defer gzr.Close()
+
+	for {
+		gzr.Multistream(false)
+
+		tr := tar.NewReader(gzr)
+		for {
+			hd, err := tr.Next()
+			if err == io.EOF {
+				break
+			}
+			if err != nil {
+				return nil, err
+			}
+
+			if hd.Name == ".PKGINFO" {
+				p, err := ParsePackageInfo(tr)
+				if err != nil {
+					return nil, err
+				}
+
+				// drain the reader
+				for {
+					if _, err := tr.Next(); err != nil {
+						break
+					}
+				}
+
+				p.FileMetadata.Checksum = "Q1" + base64.StdEncoding.EncodeToString(h.Sum(nil))
+
+				return p, nil
+			}
+		}
+
+		h = sha1.New()
+
+		err = gzr.Reset(&teeByteReader{br, h})
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return nil, ErrMissingPKGINFOFile
+}
+
+// ParsePackageInfo parses a PKGINFO file to retrieve the metadata of an Alpine package
+func ParsePackageInfo(r io.Reader) (*Package, error) {
+	p := &Package{}
+
+	scanner := bufio.NewScanner(r)
+	for scanner.Scan() {
+		line := scanner.Text()
+
+		if strings.HasPrefix(line, "#") {
+			continue
+		}
+
+		i := strings.IndexRune(line, '=')
+		if i == -1 {
+			continue
+		}
+
+		key := strings.TrimSpace(line[:i])
+		value := strings.TrimSpace(line[i+1:])
+
+		switch key {
+		case "pkgname":
+			p.Name = value
+		case "pkgver":
+			p.Version = value
+		case "pkgdesc":
+			p.VersionMetadata.Description = value
+		case "url":
+			p.VersionMetadata.ProjectURL = value
+		case "builddate":
+			n, err := strconv.ParseInt(value, 10, 64)
+			if err == nil {
+				p.FileMetadata.BuildDate = n
+			}
+		case "size":
+			n, err := strconv.ParseInt(value, 10, 64)
+			if err == nil {
+				p.FileMetadata.Size = n
+			}
+		case "arch":
+			p.FileMetadata.Architecture = value
+		case "origin":
+			p.FileMetadata.Origin = value
+		case "commit":
+			p.FileMetadata.CommitHash = value
+		case "maintainer":
+			p.VersionMetadata.Maintainer = value
+		case "packager":
+			p.FileMetadata.Packager = value
+		case "license":
+			p.VersionMetadata.License = value
+		case "install_if":
+			p.FileMetadata.InstallIf = value
+		case "provides":
+			if value != "" {
+				p.FileMetadata.Provides = append(p.FileMetadata.Provides, value)
+			}
+		case "depend":
+			if value != "" {
+				p.FileMetadata.Dependencies = append(p.FileMetadata.Dependencies, value)
+			}
+		}
+	}
+	if err := scanner.Err(); err != nil {
+		return nil, err
+	}
+
+	if p.Name == "" {
+		return nil, ErrInvalidName
+	}
+
+	if p.Version == "" {
+		return nil, ErrInvalidVersion
+	}
+
+	if !validation.IsValidURL(p.VersionMetadata.ProjectURL) {
+		p.VersionMetadata.ProjectURL = ""
+	}
+
+	return p, nil
+}
+
+// Same as io.TeeReader but implements io.ByteReader
+type teeByteReader struct {
+	r *bufio.Reader
+	w io.Writer
+}
+
+func (t *teeByteReader) Read(p []byte) (int, error) {
+	n, err := t.r.Read(p)
+	if n > 0 {
+		if n, err := t.w.Write(p[:n]); err != nil {
+			return n, err
+		}
+	}
+	return n, err
+}
+
+func (t *teeByteReader) ReadByte() (byte, error) {
+	b, err := t.r.ReadByte()
+	if err == nil {
+		if _, err := t.w.Write([]byte{b}); err != nil {
+			return 0, err
+		}
+	}
+	return b, err
+}
--- a/modules/packages/alpine/metadata_test.go
+++ b/modules/packages/alpine/metadata_test.go
@ -0,0 +1,143 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package alpine
+
+import (
+	"archive/tar"
+	"bytes"
+	"compress/gzip"
+	"io"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+const (
+	packageName        = "gitea"
+	packageVersion     = "1.0.1"
+	packageDescription = "Package Description"
+	packageProjectURL  = "https://gitea.io"
+	packageMaintainer  = "KN4CK3R <dummy@gitea.io>"
+)
+
+func createPKGINFOContent(name, version string) []byte {
+	return []byte(`pkgname = ` + name + `
+pkgver = ` + version + `
+pkgdesc = ` + packageDescription + `
+url = ` + packageProjectURL + `
+# comment
+builddate = 1678834800
+packager = Gitea <pack@ag.er>
+size = 123456
+arch = aarch64
+origin = origin
+commit = 1111e709613fbc979651b09ac2bc27c6591a9999
+maintainer = ` + packageMaintainer + `
+license = MIT
+depend = common
+install_if = value
+depend = gitea
+provides = common
+provides = gitea`)
+}
+
+func TestParsePackage(t *testing.T) {
+	createPackage := func(name string, content []byte) io.Reader {
+		names := []string{"first.stream", name}
+		contents := [][]byte{{0}, content}
+
+		var buf bytes.Buffer
+		zw := gzip.NewWriter(&buf)
+
+		for i := range names {
+			if i != 0 {
+				zw.Close()
+				zw.Reset(&buf)
+			}
+
+			tw := tar.NewWriter(zw)
+			hdr := &tar.Header{
+				Name: names[i],
+				Mode: 0o600,
+				Size: int64(len(contents[i])),
+			}
+			tw.WriteHeader(hdr)
+			tw.Write(contents[i])
+			tw.Close()
+		}
+
+		zw.Close()
+
+		return &buf
+	}
+
+	t.Run("MissingPKGINFOFile", func(t *testing.T) {
+		data := createPackage("dummy.txt", []byte{})
+
+		pp, err := ParsePackage(data)
+		assert.Nil(t, pp)
+		assert.ErrorIs(t, err, ErrMissingPKGINFOFile)
+	})
+
+	t.Run("InvalidPKGINFOFile", func(t *testing.T) {
+		data := createPackage(".PKGINFO", []byte{})
+
+		pp, err := ParsePackage(data)
+		assert.Nil(t, pp)
+		assert.ErrorIs(t, err, ErrInvalidName)
+	})
+
+	t.Run("Valid", func(t *testing.T) {
+		data := createPackage(".PKGINFO", createPKGINFOContent(packageName, packageVersion))
+
+		p, err := ParsePackage(data)
+		assert.NoError(t, err)
+		assert.NotNil(t, p)
+
+		assert.Equal(t, "Q1SRYURM5+uQDqfHSwTnNIOIuuDVQ=", p.FileMetadata.Checksum)
+	})
+}
+
+func TestParsePackageInfo(t *testing.T) {
+	t.Run("InvalidName", func(t *testing.T) {
+		data := createPKGINFOContent("", packageVersion)
+
+		p, err := ParsePackageInfo(bytes.NewReader(data))
+		assert.Nil(t, p)
+		assert.ErrorIs(t, err, ErrInvalidName)
+	})
+
+	t.Run("InvalidVersion", func(t *testing.T) {
+		data := createPKGINFOContent(packageName, "")
+
+		p, err := ParsePackageInfo(bytes.NewReader(data))
+		assert.Nil(t, p)
+		assert.ErrorIs(t, err, ErrInvalidVersion)
+	})
+
+	t.Run("Valid", func(t *testing.T) {
+		data := createPKGINFOContent(packageName, packageVersion)
+
+		p, err := ParsePackageInfo(bytes.NewReader(data))
+		assert.NoError(t, err)
+		assert.NotNil(t, p)
+
+		assert.Equal(t, packageName, p.Name)
+		assert.Equal(t, packageVersion, p.Version)
+		assert.Equal(t, packageDescription, p.VersionMetadata.Description)
+		assert.Equal(t, packageMaintainer, p.VersionMetadata.Maintainer)
+		assert.Equal(t, packageProjectURL, p.VersionMetadata.ProjectURL)
+		assert.Equal(t, "MIT", p.VersionMetadata.License)
+		assert.Empty(t, p.FileMetadata.Checksum)
+		assert.Equal(t, "Gitea <pack@ag.er>", p.FileMetadata.Packager)
+		assert.EqualValues(t, 1678834800, p.FileMetadata.BuildDate)
+		assert.EqualValues(t, 123456, p.FileMetadata.Size)
+		assert.Equal(t, "aarch64", p.FileMetadata.Architecture)
+		assert.Equal(t, "origin", p.FileMetadata.Origin)
+		assert.Equal(t, "1111e709613fbc979651b09ac2bc27c6591a9999", p.FileMetadata.CommitHash)
+		assert.Equal(t, "value", p.FileMetadata.InstallIf)
+		assert.ElementsMatch(t, []string{"common", "gitea"}, p.FileMetadata.Provides)
+		assert.ElementsMatch(t, []string{"common", "gitea"}, p.FileMetadata.Dependencies)
+	})
+}
--- a/modules/setting/packages.go
+++ b/modules/setting/packages.go
@ -24,6 +24,7 @@ var (

 		LimitTotalOwnerCount int64
 		LimitTotalOwnerSize  int64
+		LimitSizeAlpine      int64
 		LimitSizeCargo       int64
 		LimitSizeChef        int64
 		LimitSizeComposer    int64
@ -69,6 +70,7 @@ func loadPackagesFrom(rootCfg ConfigProvider) {
 	}

 	Packages.LimitTotalOwnerSize = mustBytes(sec, "LIMIT_TOTAL_OWNER_SIZE")
+	Packages.LimitSizeAlpine = mustBytes(sec, "LIMIT_SIZE_ALPINE")
 	Packages.LimitSizeCargo = mustBytes(sec, "LIMIT_SIZE_CARGO")
 	Packages.LimitSizeChef = mustBytes(sec, "LIMIT_SIZE_CHEF")
 	Packages.LimitSizeComposer = mustBytes(sec, "LIMIT_SIZE_COMPOSER")
--- a/modules/util/keypair.go
+++ b/modules/util/keypair.go
@ -4,10 +4,13 @@
 package util

 import (
+	"crypto"
 	"crypto/rand"
 	"crypto/rsa"
 	"crypto/x509"
 	"encoding/pem"
+
+	"github.com/minio/sha256-simd"
 )

 // GenerateKeyPair generates a public and private keypair
@ -43,3 +46,16 @@ func pemBlockForPub(pub *rsa.PublicKey) (string, error) {
 	})
 	return string(pubBytes), nil
 }
+
+// CreatePublicKeyFingerprint creates a fingerprint of the given key.
+// The fingerprint is the sha256 sum of the PKIX structure of the key.
+func CreatePublicKeyFingerprint(key crypto.PublicKey) ([]byte, error) {
+	bytes, err := x509.MarshalPKIXPublicKey(key)
+	if err != nil {
+		return nil, err
+	}
+
+	checksum := sha256.Sum256(bytes)
+
+	return checksum[:], nil
+}
--- a/options/locale/locale_en-US.ini
+++ b/options/locale/locale_en-US.ini
@ -3212,6 +3212,15 @@ versions = Versions
 versions.view_all = View all
 dependency.id = ID
 dependency.version = Version
+alpine.registry = Setup this registry by adding the url in your <code>/etc/apk/repositories</code> file:
+alpine.registry.key = Download the registry public RSA key into the <code>/etc/apk/keys/</code> folder to verify the index signature:
+alpine.registry.info = Choose $branch and $repository from the list below.
+alpine.install = To install the package, run the following command:
+alpine.documentation = For more information on the Alpine registry, see <a target="_blank" rel="noopener noreferrer" href="%s">the documentation</a>.
+alpine.repository = Repository Info
+alpine.repository.branches = Branches
+alpine.repository.repositories = Repositories
+alpine.repository.architectures = Architectures
 cargo.registry = Setup this registry in the Cargo configuration file (for example <code>~/.cargo/config.toml</code>):
 cargo.install = To install the package using Cargo, run the following command:
 cargo.documentation = For more information on the Cargo registry, see <a target="_blank" rel="noopener noreferrer" href="%s">the documentation</a>.
--- a/public/img/svg/gitea-alpine.svg
+++ b/public/img/svg/gitea-alpine.svg
@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" xml:space="preserve" viewBox="0 0 186 162" class="svg gitea-alpine" width="16" height="16" aria-hidden="true"><g fill="#0d597f"><path d="M67 100.75V81.125L52.875 95.25a41.588 41.588 0 0 0 4.3 2.637c1.35.71 2.612 1.25 3.787 1.676a21.12 21.12 0 0 0 3.275.887c1.006.184 1.926.266 2.763.278m72.25-1.625c.025.02.163.137.416.298.255.163.628.372 1.123.578.494.205 1.111.409 1.85.56.745.152 1.612.252 2.625.252.838 0 1.762-.073 2.775-.25a20.93 20.93 0 0 0 3.3-.873 29.25 29.25 0 0 0 3.837-1.676 41.805 41.805 0 0 0 4.375-2.674l-10.712-10.5-35.5-35.625-15.625 15.625-21-21.625-52.75 52.125c1.55 1.075 3 1.95 4.362 2.675a28.324 28.324 0 0 0 3.838 1.675c1.189.414 2.287.696 3.3.872 1.012.177 1.937.251 2.775.251 1.005 0 1.875-.1 2.625-.252a9.726 9.726 0 0 0 1.85-.561c.495-.205.866-.414 1.121-.577s.393-.278.418-.3l23.875-23.875 8.512-8.162 23.625 23.625 8.238 8.475c.024.021.162.137.417.299.255.162.626.37 1.121.577.495.205 1.113.409 1.85.56.745.153 1.625.253 2.625.253.838 0 1.763-.074 2.775-.25a20.966 20.966 0 0 0 3.3-.874 29.323 29.323 0 0 0 3.838-1.675 41.805 41.805 0 0 0 4.375-2.675l-18.875-18.5 3.525-3.525 16.375 16.375 9.55 9.462m-.204-98.75 46.5 80.625-46.5 80.625H46.05L-.45 81.066 46.05.441z"/><path d="M110.75 77 98.363 64.625l.88-.886 12.476 12.337z"/></g></svg>
--- a/routers/api/packages/alpine/alpine.go
+++ b/routers/api/packages/alpine/alpine.go
@ -0,0 +1,253 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package alpine
+
+import (
+	"crypto/x509"
+	"encoding/hex"
+	"encoding/pem"
+	"errors"
+	"fmt"
+	"io"
+	"net/http"
+	"strings"
+
+	packages_model "code.gitea.io/gitea/models/packages"
+	"code.gitea.io/gitea/modules/context"
+	"code.gitea.io/gitea/modules/json"
+	packages_module "code.gitea.io/gitea/modules/packages"
+	alpine_module "code.gitea.io/gitea/modules/packages/alpine"
+	"code.gitea.io/gitea/modules/util"
+	"code.gitea.io/gitea/routers/api/packages/helper"
+	packages_service "code.gitea.io/gitea/services/packages"
+	alpine_service "code.gitea.io/gitea/services/packages/alpine"
+)
+
+func apiError(ctx *context.Context, status int, obj interface{}) {
+	helper.LogAndProcessError(ctx, status, obj, func(message string) {
+		ctx.PlainText(status, message)
+	})
+}
+
+func GetRepositoryKey(ctx *context.Context) {
+	_, pub, err := alpine_service.GetOrCreateKeyPair(ctx.Package.Owner.ID)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	pubPem, _ := pem.Decode([]byte(pub))
+	if pubPem == nil {
+		apiError(ctx, http.StatusInternalServerError, "failed to decode private key pem")
+		return
+	}
+
+	pubKey, err := x509.ParsePKIXPublicKey(pubPem.Bytes)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	fingerprint, err := util.CreatePublicKeyFingerprint(pubKey)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	ctx.ServeContent(strings.NewReader(pub), &context.ServeHeaderOptions{
+		ContentType: "application/x-pem-file",
+		Filename:    fmt.Sprintf("%s@%s.rsa.pub", ctx.Package.Owner.LowerName, hex.EncodeToString(fingerprint)),
+	})
+}
+
+func GetRepositoryFile(ctx *context.Context) {
+	pv, err := alpine_service.GetOrCreateRepositoryVersion(ctx.Package.Owner.ID)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	s, pf, err := packages_service.GetFileStreamByPackageVersion(
+		ctx,
+		pv,
+		&packages_service.PackageFileInfo{
+			Filename:     alpine_service.IndexFilename,
+			CompositeKey: fmt.Sprintf("%s|%s|%s", ctx.Params("branch"), ctx.Params("repository"), ctx.Params("architecture")),
+		},
+	)
+	if err != nil {
+		if errors.Is(err, util.ErrNotExist) {
+			apiError(ctx, http.StatusNotFound, err)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+	defer s.Close()
+
+	ctx.ServeContent(s, &context.ServeHeaderOptions{
+		Filename:     pf.Name,
+		LastModified: pf.CreatedUnix.AsLocalTime(),
+	})
+}
+
+func UploadPackageFile(ctx *context.Context) {
+	branch := strings.TrimSpace(ctx.Params("branch"))
+	repository := strings.TrimSpace(ctx.Params("repository"))
+	if branch == "" || repository == "" {
+		apiError(ctx, http.StatusBadRequest, "invalid branch or repository")
+		return
+	}
+
+	upload, close, err := ctx.UploadStream()
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	if close {
+		defer upload.Close()
+	}
+
+	buf, err := packages_module.CreateHashedBufferFromReader(upload)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	defer buf.Close()
+
+	pck, err := alpine_module.ParsePackage(buf)
+	if err != nil {
+		if errors.Is(err, util.ErrInvalidArgument) || err == io.EOF {
+			apiError(ctx, http.StatusBadRequest, err)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+
+	if _, err := buf.Seek(0, io.SeekStart); err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	fileMetadataRaw, err := json.Marshal(pck.FileMetadata)
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	_, _, err = packages_service.CreatePackageOrAddFileToExisting(
+		&packages_service.PackageCreationInfo{
+			PackageInfo: packages_service.PackageInfo{
+				Owner:       ctx.Package.Owner,
+				PackageType: packages_model.TypeAlpine,
+				Name:        pck.Name,
+				Version:     pck.Version,
+			},
+			Creator:  ctx.Doer,
+			Metadata: pck.VersionMetadata,
+		},
+		&packages_service.PackageFileCreationInfo{
+			PackageFileInfo: packages_service.PackageFileInfo{
+				Filename:     fmt.Sprintf("%s-%s.apk", pck.Name, pck.Version),
+				CompositeKey: fmt.Sprintf("%s|%s|%s", branch, repository, pck.FileMetadata.Architecture),
+			},
+			Creator: ctx.Doer,
+			Data:    buf,
+			IsLead:  true,
+			Properties: map[string]string{
+				alpine_module.PropertyBranch:       branch,
+				alpine_module.PropertyRepository:   repository,
+				alpine_module.PropertyArchitecture: pck.FileMetadata.Architecture,
+				alpine_module.PropertyMetadata:     string(fileMetadataRaw),
+			},
+		},
+	)
+	if err != nil {
+		switch err {
+		case packages_model.ErrDuplicatePackageVersion, packages_model.ErrDuplicatePackageFile:
+			apiError(ctx, http.StatusBadRequest, err)
+		case packages_service.ErrQuotaTotalCount, packages_service.ErrQuotaTypeSize, packages_service.ErrQuotaTotalSize:
+			apiError(ctx, http.StatusForbidden, err)
+		default:
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+
+	if err := alpine_service.BuildSpecificRepositoryFiles(ctx, ctx.Package.Owner.ID, branch, repository, pck.FileMetadata.Architecture); err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	ctx.Status(http.StatusCreated)
+}
+
+func DownloadPackageFile(ctx *context.Context) {
+	pfs, _, err := packages_model.SearchFiles(ctx, &packages_model.PackageFileSearchOptions{
+		OwnerID:      ctx.Package.Owner.ID,
+		PackageType:  packages_model.TypeAlpine,
+		Query:        ctx.Params("filename"),
+		CompositeKey: fmt.Sprintf("%s|%s|%s", ctx.Params("branch"), ctx.Params("repository"), ctx.Params("architecture")),
+	})
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	if len(pfs) != 1 {
+		apiError(ctx, http.StatusNotFound, nil)
+		return
+	}
+
+	s, pf, err := packages_service.GetPackageFileStream(ctx, pfs[0])
+	if err != nil {
+		if errors.Is(err, util.ErrNotExist) {
+			apiError(ctx, http.StatusNotFound, err)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+	defer s.Close()
+
+	ctx.ServeContent(s, &context.ServeHeaderOptions{
+		Filename:     pf.Name,
+		LastModified: pf.CreatedUnix.AsLocalTime(),
+	})
+}
+
+func DeletePackageFile(ctx *context.Context) {
+	branch, repository, architecture := ctx.Params("branch"), ctx.Params("repository"), ctx.Params("architecture")
+
+	pfs, _, err := packages_model.SearchFiles(ctx, &packages_model.PackageFileSearchOptions{
+		OwnerID:      ctx.Package.Owner.ID,
+		PackageType:  packages_model.TypeAlpine,
+		Query:        ctx.Params("filename"),
+		CompositeKey: fmt.Sprintf("%s|%s|%s", branch, repository, architecture),
+	})
+	if err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+	if len(pfs) != 1 {
+		apiError(ctx, http.StatusNotFound, nil)
+		return
+	}
+
+	if err := packages_service.RemovePackageFileAndVersionIfUnreferenced(ctx.Doer, pfs[0]); err != nil {
+		if errors.Is(err, util.ErrNotExist) {
+			apiError(ctx, http.StatusNotFound, err)
+		} else {
+			apiError(ctx, http.StatusInternalServerError, err)
+		}
+		return
+	}
+
+	if err := alpine_service.BuildSpecificRepositoryFiles(ctx, ctx.Package.Owner.ID, branch, repository, architecture); err != nil {
+		apiError(ctx, http.StatusInternalServerError, err)
+		return
+	}
+
+	ctx.Status(http.StatusNoContent)
+}
--- a/routers/api/packages/api.go
+++ b/routers/api/packages/api.go
@ -15,6 +15,7 @@ import (
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/web"
+	"code.gitea.io/gitea/routers/api/packages/alpine"
 	"code.gitea.io/gitea/routers/api/packages/cargo"
 	"code.gitea.io/gitea/routers/api/packages/chef"
 	"code.gitea.io/gitea/routers/api/packages/composer"
@ -107,6 +108,19 @@ func CommonRoutes(ctx gocontext.Context) *web.Route {
 	})

 	r.Group("/{username}", func() {
+		r.Group("/alpine", func() {
+			r.Get("/key", alpine.GetRepositoryKey)
+			r.Group("/{branch}/{repository}", func() {
+				r.Put("", reqPackageAccess(perm.AccessModeWrite), alpine.UploadPackageFile)
+				r.Group("/{architecture}", func() {
+					r.Get("/APKINDEX.tar.gz", alpine.GetRepositoryFile)
+					r.Group("/{filename}", func() {
+						r.Get("", alpine.DownloadPackageFile)
+						r.Delete("", reqPackageAccess(perm.AccessModeWrite), alpine.DeletePackageFile)
+					})
+				})
+			})
+		}, reqPackageAccess(perm.AccessModeRead))
 		r.Group("/cargo", func() {
 			r.Group("/api/v1/crates", func() {
 				r.Get("", cargo.SearchPackages)
--- a/routers/api/v1/packages/package.go
+++ b/routers/api/v1/packages/package.go
@ -40,7 +40,7 @@ func ListPackages(ctx *context.APIContext) {
 	//   in: query
 	//   description: package type filter
 	//   type: string
-	//   enum: [cargo, chef, composer, conan, conda, container, debian, generic, helm, maven, npm, nuget, pub, pypi, rpm, rubygems, swift, vagrant]
+	//   enum: [alpine, cargo, chef, composer, conan, conda, container, debian, generic, helm, maven, npm, nuget, pub, pypi, rpm, rubygems, swift, vagrant]
 	// - name: q
 	//   in: query
 	//   description: name filter
--- a/routers/web/user/package.go
+++ b/routers/web/user/package.go
@ -17,6 +17,7 @@ import (
 	"code.gitea.io/gitea/modules/container"
 	"code.gitea.io/gitea/modules/context"
 	"code.gitea.io/gitea/modules/log"
+	alpine_module "code.gitea.io/gitea/modules/packages/alpine"
 	debian_module "code.gitea.io/gitea/modules/packages/debian"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/util"
@ -168,6 +169,27 @@ func ViewPackageVersion(ctx *context.Context) {
 	switch pd.Package.Type {
 	case packages_model.TypeContainer:
 		ctx.Data["RegistryHost"] = setting.Packages.RegistryHost
+	case packages_model.TypeAlpine:
+		branches := make(container.Set[string])
+		repositories := make(container.Set[string])
+		architectures := make(container.Set[string])
+
+		for _, f := range pd.Files {
+			for _, pp := range f.Properties {
+				switch pp.Name {
+				case alpine_module.PropertyBranch:
+					branches.Add(pp.Value)
+				case alpine_module.PropertyRepository:
+					repositories.Add(pp.Value)
+				case alpine_module.PropertyArchitecture:
+					architectures.Add(pp.Value)
+				}
+			}
+		}
+
+		ctx.Data["Branches"] = branches.Values()
+		ctx.Data["Repositories"] = repositories.Values()
+		ctx.Data["Architectures"] = architectures.Values()
 	case packages_model.TypeDebian:
 		distributions := make(container.Set[string])
 		components := make(container.Set[string])
--- a/services/auth/source/oauth2/jwtsigningkey.go
+++ b/services/auth/source/oauth2/jwtsigningkey.go
@ -23,7 +23,6 @@ import (
 	"code.gitea.io/gitea/modules/util"

 	"github.com/golang-jwt/jwt/v4"
-	"github.com/minio/sha256-simd"
 )

 // ErrInvalidAlgorithmType represents an invalid algorithm error.
@ -82,7 +81,7 @@ type rsaSingingKey struct {
 }

 func newRSASingingKey(signingMethod jwt.SigningMethod, key *rsa.PrivateKey) (rsaSingingKey, error) {
-	kid, err := createPublicKeyFingerprint(key.Public().(*rsa.PublicKey))
+	kid, err := util.CreatePublicKeyFingerprint(key.Public().(*rsa.PublicKey))
 	if err != nil {
 		return rsaSingingKey{}, err
 	}
@ -133,7 +132,7 @@ type eddsaSigningKey struct {
 }

 func newEdDSASingingKey(signingMethod jwt.SigningMethod, key ed25519.PrivateKey) (eddsaSigningKey, error) {
-	kid, err := createPublicKeyFingerprint(key.Public().(ed25519.PublicKey))
+	kid, err := util.CreatePublicKeyFingerprint(key.Public().(ed25519.PublicKey))
 	if err != nil {
 		return eddsaSigningKey{}, err
 	}
@ -184,7 +183,7 @@ type ecdsaSingingKey struct {
 }

 func newECDSASingingKey(signingMethod jwt.SigningMethod, key *ecdsa.PrivateKey) (ecdsaSingingKey, error) {
-	kid, err := createPublicKeyFingerprint(key.Public().(*ecdsa.PublicKey))
+	kid, err := util.CreatePublicKeyFingerprint(key.Public().(*ecdsa.PublicKey))
 	if err != nil {
 		return ecdsaSingingKey{}, err
 	}
@ -229,19 +228,6 @@ func (key ecdsaSingingKey) PreProcessToken(token *jwt.Token) {
 	token.Header["kid"] = key.id
 }

-// createPublicKeyFingerprint creates a fingerprint of the given key.
-// The fingerprint is the sha256 sum of the PKIX structure of the key.
-func createPublicKeyFingerprint(key interface{}) ([]byte, error) {
-	bytes, err := x509.MarshalPKIXPublicKey(key)
-	if err != nil {
-		return nil, err
-	}
-
-	checksum := sha256.Sum256(bytes)
-
-	return checksum[:], nil
-}
-
 // CreateJWTSigningKey creates a signing key from an algorithm / key pair.
 func CreateJWTSigningKey(algorithm string, key interface{}) (JWTSigningKey, error) {
 	var signingMethod jwt.SigningMethod
--- a/services/forms/package_form.go
+++ b/services/forms/package_form.go
@ -15,7 +15,7 @@ import (
 type PackageCleanupRuleForm struct {
 	ID            int64
 	Enabled       bool
-	Type          string `binding:"Required;In(cargo,chef,composer,conan,conda,container,debian,generic,helm,maven,npm,nuget,pub,pypi,rpm,rubygems,swift,vagrant)"`
+	Type          string `binding:"Required;In(alpine,cargo,chef,composer,conan,conda,container,debian,generic,helm,maven,npm,nuget,pub,pypi,rpm,rubygems,swift,vagrant)"`
 	KeepCount     int    `binding:"In(0,1,5,10,25,50,100)"`
 	KeepPattern   string `binding:"RegexPattern"`
 	RemoveDays    int    `binding:"In(0,7,14,30,60,90,180)"`
--- a/services/packages/alpine/repository.go
+++ b/services/packages/alpine/repository.go
@ -0,0 +1,328 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package alpine
+
+import (
+	"archive/tar"
+	"bytes"
+	"compress/gzip"
+	"context"
+	"crypto"
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/sha1"
+	"crypto/x509"
+	"encoding/hex"
+	"encoding/pem"
+	"errors"
+	"fmt"
+	"io"
+	"strings"
+
+	packages_model "code.gitea.io/gitea/models/packages"
+	alpine_model "code.gitea.io/gitea/models/packages/alpine"
+	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/json"
+	packages_module "code.gitea.io/gitea/modules/packages"
+	alpine_module "code.gitea.io/gitea/modules/packages/alpine"
+	"code.gitea.io/gitea/modules/util"
+	packages_service "code.gitea.io/gitea/services/packages"
+)
+
+const IndexFilename = "APKINDEX.tar.gz"
+
+// GetOrCreateRepositoryVersion gets or creates the internal repository package
+// The Alpine registry needs multiple index files which are stored in this package.
+func GetOrCreateRepositoryVersion(ownerID int64) (*packages_model.PackageVersion, error) {
+	return packages_service.GetOrCreateInternalPackageVersion(ownerID, packages_model.TypeAlpine, alpine_module.RepositoryPackage, alpine_module.RepositoryVersion)
+}
+
+// GetOrCreateKeyPair gets or creates the RSA keys used to sign repository files
+func GetOrCreateKeyPair(ownerID int64) (string, string, error) {
+	priv, err := user_model.GetSetting(ownerID, alpine_module.SettingKeyPrivate)
+	if err != nil && !errors.Is(err, util.ErrNotExist) {
+		return "", "", err
+	}
+
+	pub, err := user_model.GetSetting(ownerID, alpine_module.SettingKeyPublic)
+	if err != nil && !errors.Is(err, util.ErrNotExist) {
+		return "", "", err
+	}
+
+	if priv == "" || pub == "" {
+		priv, pub, err = util.GenerateKeyPair(4096)
+		if err != nil {
+			return "", "", err
+		}
+
+		if err := user_model.SetUserSetting(ownerID, alpine_module.SettingKeyPrivate, priv); err != nil {
+			return "", "", err
+		}
+
+		if err := user_model.SetUserSetting(ownerID, alpine_module.SettingKeyPublic, pub); err != nil {
+			return "", "", err
+		}
+	}
+
+	return priv, pub, nil
+}
+
+// BuildAllRepositoryFiles (re)builds all repository files for every available distributions, components and architectures
+func BuildAllRepositoryFiles(ctx context.Context, ownerID int64) error {
+	pv, err := GetOrCreateRepositoryVersion(ownerID)
+	if err != nil {
+		return err
+	}
+
+	// 1. Delete all existing repository files
+	pfs, err := packages_model.GetFilesByVersionID(ctx, pv.ID)
+	if err != nil {
+		return err
+	}
+
+	for _, pf := range pfs {
+		if err := packages_model.DeleteAllProperties(ctx, packages_model.PropertyTypeFile, pf.ID); err != nil {
+			return err
+		}
+		if err := packages_model.DeleteFileByID(ctx, pf.ID); err != nil {
+			return err
+		}
+	}
+
+	// 2. (Re)Build repository files for existing packages
+	branches, err := alpine_model.GetBranches(ctx, ownerID)
+	if err != nil {
+		return err
+	}
+	for _, branch := range branches {
+		repositories, err := alpine_model.GetRepositories(ctx, ownerID, branch)
+		if err != nil {
+			return err
+		}
+		for _, repository := range repositories {
+			architectures, err := alpine_model.GetArchitectures(ctx, ownerID, repository)
+			if err != nil {
+				return err
+			}
+			for _, architecture := range architectures {
+				if err := buildPackagesIndex(ctx, ownerID, pv, branch, repository, architecture); err != nil {
+					return fmt.Errorf("failed to build repository files [%s/%s/%s]: %w", branch, repository, architecture, err)
+				}
+			}
+		}
+	}
+
+	return nil
+}
+
+// BuildSpecificRepositoryFiles builds index files for the repository
+func BuildSpecificRepositoryFiles(ctx context.Context, ownerID int64, branch, repository, architecture string) error {
+	pv, err := GetOrCreateRepositoryVersion(ownerID)
+	if err != nil {
+		return err
+	}
+
+	return buildPackagesIndex(ctx, ownerID, pv, branch, repository, architecture)
+}
+
+type packageData struct {
+	Package         *packages_model.Package
+	Version         *packages_model.PackageVersion
+	Blob            *packages_model.PackageBlob
+	VersionMetadata *alpine_module.VersionMetadata
+	FileMetadata    *alpine_module.FileMetadata
+}
+
+type packageCache = map[*packages_model.PackageFile]*packageData
+
+// https://wiki.alpinelinux.org/wiki/Apk_spec#APKINDEX_Format
+func buildPackagesIndex(ctx context.Context, ownerID int64, repoVersion *packages_model.PackageVersion, branch, repository, architecture string) error {
+	pfs, _, err := packages_model.SearchFiles(ctx, &packages_model.PackageFileSearchOptions{
+		OwnerID:     ownerID,
+		PackageType: packages_model.TypeAlpine,
+		Query:       "%.apk",
+		Properties: map[string]string{
+			alpine_module.PropertyBranch:       branch,
+			alpine_module.PropertyRepository:   repository,
+			alpine_module.PropertyArchitecture: architecture,
+		},
+	})
+	if err != nil {
+		return err
+	}
+
+	// Delete the package indices if there are no packages
+	if len(pfs) == 0 {
+		pf, err := packages_model.GetFileForVersionByName(ctx, repoVersion.ID, IndexFilename, fmt.Sprintf("%s|%s|%s", branch, repository, architecture))
+		if err != nil && !errors.Is(err, util.ErrNotExist) {
+			return err
+		}
+
+		if err := packages_model.DeleteAllProperties(ctx, packages_model.PropertyTypeFile, pf.ID); err != nil {
+			return err
+		}
+		return packages_model.DeleteFileByID(ctx, pf.ID)
+	}
+
+	// Cache data needed for all repository files
+	cache := make(packageCache)
+	for _, pf := range pfs {
+		pv, err := packages_model.GetVersionByID(ctx, pf.VersionID)
+		if err != nil {
+			return err
+		}
+		p, err := packages_model.GetPackageByID(ctx, pv.PackageID)
+		if err != nil {
+			return err
+		}
+		pb, err := packages_model.GetBlobByID(ctx, pf.BlobID)
+		if err != nil {
+			return err
+		}
+		pps, err := packages_model.GetPropertiesByName(ctx, packages_model.PropertyTypeFile, pf.ID, alpine_module.PropertyMetadata)
+		if err != nil {
+			return err
+		}
+
+		pd := &packageData{
+			Package: p,
+			Version: pv,
+			Blob:    pb,
+		}
+
+		if err := json.Unmarshal([]byte(pv.MetadataJSON), &pd.VersionMetadata); err != nil {
+			return err
+		}
+		if len(pps) > 0 {
+			if err := json.Unmarshal([]byte(pps[0].Value), &pd.FileMetadata); err != nil {
+				return err
+			}
+		}
+
+		cache[pf] = pd
+	}
+
+	var buf bytes.Buffer
+	for _, pf := range pfs {
+		pd := cache[pf]
+
+		fmt.Fprintf(&buf, "C:%s\n", pd.FileMetadata.Checksum)
+		fmt.Fprintf(&buf, "P:%s\n", pd.Package.Name)
+		fmt.Fprintf(&buf, "V:%s\n", pd.Version.Version)
+		fmt.Fprintf(&buf, "A:%s\n", pd.FileMetadata.Architecture)
+		if pd.VersionMetadata.Description != "" {
+			fmt.Fprintf(&buf, "T:%s\n", pd.VersionMetadata.Description)
+		}
+		if pd.VersionMetadata.ProjectURL != "" {
+			fmt.Fprintf(&buf, "U:%s\n", pd.VersionMetadata.ProjectURL)
+		}
+		if pd.VersionMetadata.License != "" {
+			fmt.Fprintf(&buf, "L:%s\n", pd.VersionMetadata.License)
+		}
+		fmt.Fprintf(&buf, "S:%d\n", pd.Blob.Size)
+		fmt.Fprintf(&buf, "I:%d\n", pd.FileMetadata.Size)
+		fmt.Fprintf(&buf, "o:%s\n", pd.FileMetadata.Origin)
+		fmt.Fprintf(&buf, "m:%s\n", pd.VersionMetadata.Maintainer)
+		fmt.Fprintf(&buf, "t:%d\n", pd.FileMetadata.BuildDate)
+		if pd.FileMetadata.CommitHash != "" {
+			fmt.Fprintf(&buf, "c:%s\n", pd.FileMetadata.CommitHash)
+		}
+		if len(pd.FileMetadata.Dependencies) > 0 {
+			fmt.Fprintf(&buf, "D:%s\n", strings.Join(pd.FileMetadata.Dependencies, " "))
+		}
+		if len(pd.FileMetadata.Provides) > 0 {
+			fmt.Fprintf(&buf, "p:%s\n", strings.Join(pd.FileMetadata.Provides, " "))
+		}
+		fmt.Fprint(&buf, "\n")
+	}
+
+	unsignedIndexContent, _ := packages_module.NewHashedBuffer()
+	h := sha1.New()
+
+	if err := writeGzipStream(io.MultiWriter(unsignedIndexContent, h), "APKINDEX", buf.Bytes(), true); err != nil {
+		return err
+	}
+
+	priv, _, err := GetOrCreateKeyPair(ownerID)
+	if err != nil {
+		return err
+	}
+
+	privPem, _ := pem.Decode([]byte(priv))
+	if privPem == nil {
+		return fmt.Errorf("failed to decode private key pem")
+	}
+
+	privKey, err := x509.ParsePKCS1PrivateKey(privPem.Bytes)
+	if err != nil {
+		return err
+	}
+
+	sign, err := rsa.SignPKCS1v15(rand.Reader, privKey, crypto.SHA1, h.Sum(nil))
+	if err != nil {
+		return err
+	}
+
+	owner, err := user_model.GetUserByID(ctx, ownerID)
+	if err != nil {
+		return err
+	}
+
+	fingerprint, err := util.CreatePublicKeyFingerprint(&privKey.PublicKey)
+	if err != nil {
+		return err
+	}
+
+	signedIndexContent, _ := packages_module.NewHashedBuffer()
+
+	if err := writeGzipStream(
+		signedIndexContent,
+		fmt.Sprintf(".SIGN.RSA.%s@%s.rsa.pub", owner.LowerName, hex.EncodeToString(fingerprint)),
+		sign,
+		false,
+	); err != nil {
+		return err
+	}
+
+	if _, err := io.Copy(signedIndexContent, unsignedIndexContent); err != nil {
+		return err
+	}
+
+	_, err = packages_service.AddFileToPackageVersionInternal(
+		repoVersion,
+		&packages_service.PackageFileCreationInfo{
+			PackageFileInfo: packages_service.PackageFileInfo{
+				Filename:     IndexFilename,
+				CompositeKey: fmt.Sprintf("%s|%s|%s", branch, repository, architecture),
+			},
+			Creator:           user_model.NewGhostUser(),
+			Data:              signedIndexContent,
+			IsLead:            false,
+			OverwriteExisting: true,
+		},
+	)
+	return err
+}
+
+func writeGzipStream(w io.Writer, filename string, content []byte, addTarEnd bool) error {
+	zw := gzip.NewWriter(w)
+	defer zw.Close()
+
+	tw := tar.NewWriter(zw)
+	if addTarEnd {
+		defer tw.Close()
+	}
+	hdr := &tar.Header{
+		Name: filename,
+		Mode: 0o600,
+		Size: int64(len(content)),
+	}
+	if err := tw.WriteHeader(hdr); err != nil {
+		return err
+	}
+	if _, err := tw.Write(content); err != nil {
+		return err
+	}
+	return nil
+}
--- a/services/packages/packages.go
+++ b/services/packages/packages.go
@ -351,6 +351,8 @@ func CheckSizeQuotaExceeded(ctx context.Context, doer, owner *user_model.User, p

 	var typeSpecificSize int64
 	switch packageType {
+	case packages_model.TypeAlpine:
+		typeSpecificSize = setting.Packages.LimitSizeAlpine
 	case packages_model.TypeCargo:
 		typeSpecificSize = setting.Packages.LimitSizeCargo
 	case packages_model.TypeChef:
@ -486,6 +488,47 @@ func RemovePackageVersion(doer *user_model.User, pv *packages_model.PackageVersi
 	return nil
 }

+// RemovePackageFileAndVersionIfUnreferenced deletes the package file and the version if there are no referenced files afterwards
+func RemovePackageFileAndVersionIfUnreferenced(doer *user_model.User, pf *packages_model.PackageFile) error {
+	var pd *packages_model.PackageDescriptor
+
+	if err := db.WithTx(db.DefaultContext, func(ctx context.Context) error {
+		if err := DeletePackageFile(ctx, pf); err != nil {
+			return err
+		}
+
+		has, err := packages_model.HasVersionFileReferences(ctx, pf.VersionID)
+		if err != nil {
+			return err
+		}
+		if !has {
+			pv, err := packages_model.GetVersionByID(ctx, pf.VersionID)
+			if err != nil {
+				return err
+			}
+
+			pd, err = packages_model.GetPackageDescriptor(ctx, pv)
+			if err != nil {
+				return err
+			}
+
+			if err := DeletePackageVersionAndReferences(ctx, pv); err != nil {
+				return err
+			}
+		}
+
+		return nil
+	}); err != nil {
+		return err
+	}
+
+	if pd != nil {
+		notification.NotifyPackageDelete(db.DefaultContext, doer, pd)
+	}
+
+	return nil
+}
+
 // DeletePackageVersionAndReferences deletes the package version and its properties and files
 func DeletePackageVersionAndReferences(ctx context.Context, pv *packages_model.PackageVersion) error {
 	if err := packages_model.DeleteAllProperties(ctx, packages_model.PropertyTypeVersion, pv.ID); err != nil {
--- a/templates/package/content/alpine.tmpl
+++ b/templates/package/content/alpine.tmpl
@ -0,0 +1,52 @@
+{{if eq .PackageDescriptor.Package.Type "alpine"}}
+	<h4 class="ui top attached header">{{.locale.Tr "packages.installation"}}</h4>
+	<div class="ui attached segment">
+		<div class="ui form">
+			<div class="field">
+				<label>{{svg "octicon-code"}} {{.locale.Tr "packages.alpine.registry" | Safe}}</label>
+				<div class="markup"><pre class="code-block"><code><gitea-origin-url data-url="{{AppSubUrl}}/api/packages/{{$.PackageDescriptor.Owner.Name}}/alpine"></gitea-origin-url>/$branch/$repository</code></pre></div>
+				<p>{{.locale.Tr "packages.alpine.registry.info" | Safe}}</p>
+			</div>
+			<div class="field">
+				<label>{{svg "octicon-terminal"}} {{.locale.Tr "packages.alpine.registry.key" | Safe}}</label>
+				<div class="markup"><pre class="code-block"><code>curl -JO <gitea-origin-url data-url="{{AppSubUrl}}/api/packages/{{$.PackageDescriptor.Owner.Name}}/alpine/key"></gitea-origin-url></code></pre></div>
+			</div>
+			<div class="field">
+				<label>{{svg "octicon-terminal"}} {{.locale.Tr "packages.alpine.install"}}</label>
+				<div class="markup">
+					<pre class="code-block"><code>sudo apk add {{$.PackageDescriptor.Package.Name}}={{$.PackageDescriptor.Version.Version}}</code></pre>
+				</div>
+			</div>
+			<div class="field">
+				<label>{{.locale.Tr "packages.alpine.documentation" "https://docs.gitea.io/en-us/packages/alpine/" | Safe}}</label>
+			</div>
+		</div>
+	</div>
+
+	<h4 class="ui top attached header">{{.locale.Tr "packages.alpine.repository"}}</h4>
+	<div class="ui attached segment">
+		<table class="ui single line very basic table">
+			<tbody>
+				<tr>
+					<td class="collapsing"><h5>{{.locale.Tr "packages.alpine.repository.branches"}}</h5></td>
+					<td>{{StringUtils.Join .Branches ", "}}</td>
+				</tr>
+				<tr>
+					<td class="collapsing"><h5>{{.locale.Tr "packages.alpine.repository.repositories"}}</h5></td>
+					<td>{{StringUtils.Join .Repositories ", "}}</td>
+				</tr>
+				<tr>
+					<td class="collapsing"><h5>{{.locale.Tr "packages.alpine.repository.architectures"}}</h5></td>
+					<td>{{StringUtils.Join .Architectures ", "}}</td>
+				</tr>
+			</tbody>
+		</table>
+	</div>
+
+	{{if .PackageDescriptor.Metadata.Description}}
+		<h4 class="ui top attached header">{{.locale.Tr "packages.about"}}</h4>
+		<div class="ui attached segment">
+			{{.PackageDescriptor.Metadata.Description}}
+		</div>
+	{{end}}
+{{end}}
--- a/templates/package/metadata/alpine.tmpl
+++ b/templates/package/metadata/alpine.tmpl
@ -0,0 +1,5 @@
+{{if eq .PackageDescriptor.Package.Type "alpine"}}
+	{{if .PackageDescriptor.Metadata.Maintainer}}<div class="item" title="{{.locale.Tr "packages.details.author"}}">{{svg "octicon-person" 16 "mr-3"}} {{.PackageDescriptor.Metadata.Maintainer}}</div>{{end}}
+	{{if .PackageDescriptor.Metadata.ProjectURL}}<div class="item">{{svg "octicon-link-external" 16 "mr-3"}} <a href="{{.PackageDescriptor.Metadata.ProjectURL}}" target="_blank" rel="noopener noreferrer me">{{.locale.Tr "packages.details.project_site"}}</a></div>{{end}}
+	{{if .PackageDescriptor.Metadata.License}}<div class="item" title="{{$.locale.Tr "packages.details.license"}}">{{svg "octicon-law" 16 "gt-mr-3"}} {{.PackageDescriptor.Metadata.License}}</div>{{end}}
+{{end}}
--- a/templates/package/view.tmpl
+++ b/templates/package/view.tmpl
@ -19,6 +19,7 @@
 					<div class="ui divider"></div>
 				</div>
 				<div class="twelve wide column">
+					{{template "package/content/alpine" .}}
 					{{template "package/content/cargo" .}}
 					{{template "package/content/chef" .}}
 					{{template "package/content/composer" .}}
@ -48,6 +49,7 @@
 							{{end}}
 							<div class="item">{{svg "octicon-calendar" 16 "gt-mr-3"}} {{TimeSinceUnix .PackageDescriptor.Version.CreatedUnix $.locale}}</div>
 							<div class="item">{{svg "octicon-download" 16 "gt-mr-3"}} {{.PackageDescriptor.Version.DownloadCount}}</div>
+							{{template "package/metadata/alpine" .}}
 							{{template "package/metadata/cargo" .}}
 							{{template "package/metadata/chef" .}}
 							{{template "package/metadata/composer" .}}
--- a/templates/swagger/v1_json.tmpl
+++ b/templates/swagger/v1_json.tmpl
@ -2409,6 +2409,7 @@
          },
          {
            "enum": [
+              "alpine",
              "cargo",
              "chef",
              "composer",
--- a/tests/integration/api_packages_alpine_test.go
+++ b/tests/integration/api_packages_alpine_test.go
@ -0,0 +1,229 @@
+// Copyright 2023 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package integration
+
+import (
+	"archive/tar"
+	"bufio"
+	"bytes"
+	"compress/gzip"
+	"encoding/base64"
+	"fmt"
+	"io"
+	"net/http"
+	"testing"
+
+	"code.gitea.io/gitea/models/db"
+	"code.gitea.io/gitea/models/packages"
+	"code.gitea.io/gitea/models/unittest"
+	user_model "code.gitea.io/gitea/models/user"
+	alpine_module "code.gitea.io/gitea/modules/packages/alpine"
+	"code.gitea.io/gitea/tests"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPackageAlpine(t *testing.T) {
+	defer tests.PrepareTestEnv(t)()
+
+	user := unittest.AssertExistsAndLoadBean(t, &user_model.User{ID: 2})
+
+	packageName := "gitea-test"
+	packageVersion := "1.4.1-r3"
+
+	base64AlpinePackageContent := `H4sIAAAAAAACA9ML9nT30wsKdtTLzjNJzjYuckjPLElN1DUzMUxMNTa11CsqTtQrKE1ioAAYAIGZ
+iQmYBgJ02hDENjQxMTAzMzQ1MTVjMDA0MTQ1ZlAwYKADKC0uSSxSUGAYoWDm4sZZtypv75+q2fVT
+POD1bKkFB22ms+g1z+H4dk7AhC3HwUSj9EbT0Rk3Dn55dHxy/K7Q+Nl/i+L7Z036ypcRvvpZuMiN
+s7wbZL/klqRGGshv9Gi0qHTgTZfw3HytnJdx9c3NTRp/PHn+Z50uq2pjkilzjtpfd+uzQMw1M7cY
+i9RXJasnT2M+vDXCesLK7MilJt8sGplj4xUlLMUun9SzY+phFpxWxRXa06AseV9WvzH3jtGGoL5A
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+Djfa/2q5bH4699v++uMAAAAAAAAAAAAAAAAAAAAAAHbgA/eXQh8AKAAA`
+	content, err := base64.StdEncoding.DecodeString(base64AlpinePackageContent)
+	assert.NoError(t, err)
+
+	branches := []string{"v3.16", "v3.17"}
+	repositories := []string{"main", "testing"}
+
+	rootURL := fmt.Sprintf("/api/packages/%s/alpine", user.Name)
+
+	t.Run("RepositoryKey", func(t *testing.T) {
+		defer tests.PrintCurrentTest(t)()
+
+		req := NewRequest(t, "GET", rootURL+"/key")
+		resp := MakeRequest(t, req, http.StatusOK)
+
+		assert.Equal(t, "application/x-pem-file", resp.Header().Get("Content-Type"))
+		assert.Contains(t, resp.Body.String(), "-----BEGIN PUBLIC KEY-----")
+	})
+
+	for _, branch := range branches {
+		for _, repository := range repositories {
+			t.Run(fmt.Sprintf("[Branch:%s,Repository:%s]", branch, repository), func(t *testing.T) {
+				t.Run("Upload", func(t *testing.T) {
+					defer tests.PrintCurrentTest(t)()
+
+					uploadURL := fmt.Sprintf("%s/%s/%s", rootURL, branch, repository)
+
+					req := NewRequestWithBody(t, "PUT", uploadURL, bytes.NewReader([]byte{}))
+					MakeRequest(t, req, http.StatusUnauthorized)
+
+					req = NewRequestWithBody(t, "PUT", uploadURL, bytes.NewReader([]byte{}))
+					AddBasicAuthHeader(req, user.Name)
+					MakeRequest(t, req, http.StatusBadRequest)
+
+					req = NewRequestWithBody(t, "PUT", uploadURL, bytes.NewReader(content))
+					AddBasicAuthHeader(req, user.Name)
+					MakeRequest(t, req, http.StatusCreated)
+
+					pvs, err := packages.GetVersionsByPackageType(db.DefaultContext, user.ID, packages.TypeAlpine)
+					assert.NoError(t, err)
+					assert.Len(t, pvs, 1)
+
+					pd, err := packages.GetPackageDescriptor(db.DefaultContext, pvs[0])
+					assert.NoError(t, err)
+					assert.Nil(t, pd.SemVer)
+					assert.IsType(t, &alpine_module.VersionMetadata{}, pd.Metadata)
+					assert.Equal(t, packageName, pd.Package.Name)
+					assert.Equal(t, packageVersion, pd.Version.Version)
+
+					pfs, err := packages.GetFilesByVersionID(db.DefaultContext, pvs[0].ID)
+					assert.NoError(t, err)
+					assert.NotEmpty(t, pfs)
+					assert.Condition(t, func() bool {
+						seen := false
+						expectedFilename := fmt.Sprintf("%s-%s.apk", packageName, packageVersion)
+						expectedCompositeKey := fmt.Sprintf("%s|%s|x86_64", branch, repository)
+						for _, pf := range pfs {
+							if pf.Name == expectedFilename && pf.CompositeKey == expectedCompositeKey {
+								if seen {
+									return false
+								}
+								seen = true
+
+								assert.True(t, pf.IsLead)
+
+								pfps, err := packages.GetProperties(db.DefaultContext, packages.PropertyTypeFile, pf.ID)
+								assert.NoError(t, err)
+
+								for _, pfp := range pfps {
+									switch pfp.Name {
+									case alpine_module.PropertyBranch:
+										assert.Equal(t, branch, pfp.Value)
+									case alpine_module.PropertyRepository:
+										assert.Equal(t, repository, pfp.Value)
+									case alpine_module.PropertyArchitecture:
+										assert.Equal(t, "x86_64", pfp.Value)
+									}
+								}
+							}
+						}
+						return seen
+					})
+				})
+
+				t.Run("Index", func(t *testing.T) {
+					defer tests.PrintCurrentTest(t)()
+
+					url := fmt.Sprintf("%s/%s/%s/x86_64/APKINDEX.tar.gz", rootURL, branch, repository)
+
+					req := NewRequest(t, "GET", url)
+					resp := MakeRequest(t, req, http.StatusOK)
+
+					assert.Condition(t, func() bool {
+						br := bufio.NewReader(resp.Body)
+
+						gzr, err := gzip.NewReader(br)
+						assert.NoError(t, err)
+
+						for {
+							gzr.Multistream(false)
+
+							tr := tar.NewReader(gzr)
+							for {
+								hd, err := tr.Next()
+								if err == io.EOF {
+									break
+								}
+								assert.NoError(t, err)
+
+								if hd.Name == "APKINDEX" {
+									buf, err := io.ReadAll(tr)
+									assert.NoError(t, err)
+
+									s := string(buf)
+
+									assert.Contains(t, s, "C:Q1/se1PjO94hYXbfpNR1/61hVORIc=\n")
+									assert.Contains(t, s, "P:"+packageName+"\n")
+									assert.Contains(t, s, "V:"+packageVersion+"\n")
+									assert.Contains(t, s, "A:x86_64\n")
+									assert.Contains(t, s, "T:Gitea Test Package\n")
+									assert.Contains(t, s, "U:https://gitea.io/\n")
+									assert.Contains(t, s, "L:MIT\n")
+									assert.Contains(t, s, "S:1353\n")
+									assert.Contains(t, s, "I:4096\n")
+									assert.Contains(t, s, "o:gitea-test\n")
+									assert.Contains(t, s, "m:KN4CK3R <kn4ck3r@gitea.io>\n")
+									assert.Contains(t, s, "t:1679498030\n")
+
+									return true
+								}
+							}
+
+							err = gzr.Reset(br)
+							if err == io.EOF {
+								break
+							}
+							assert.NoError(t, err)
+						}
+
+						return false
+					})
+				})
+
+				t.Run("Download", func(t *testing.T) {
+					defer tests.PrintCurrentTest(t)()
+
+					req := NewRequest(t, "GET", fmt.Sprintf("%s/%s/%s/x86_64/%s-%s.apk", rootURL, branch, repository, packageName, packageVersion))
+					MakeRequest(t, req, http.StatusOK)
+				})
+			})
+		}
+	}
+
+	t.Run("Delete", func(t *testing.T) {
+		defer tests.PrintCurrentTest(t)()
+
+		for _, branch := range branches {
+			for _, repository := range repositories {
+				req := NewRequest(t, "DELETE", fmt.Sprintf("%s/%s/%s/x86_64/%s-%s.apk", rootURL, branch, repository, packageName, packageVersion))
+				MakeRequest(t, req, http.StatusUnauthorized)
+
+				req = NewRequest(t, "DELETE", fmt.Sprintf("%s/%s/%s/x86_64/%s-%s.apk", rootURL, branch, repository, packageName, packageVersion))
+				AddBasicAuthHeader(req, user.Name)
+				MakeRequest(t, req, http.StatusNoContent)
+
+				// Deleting the last file of an architecture should remove that index
+				req = NewRequest(t, "GET", fmt.Sprintf("%s/%s/%s/x86_64/APKINDEX.tar.gz", rootURL, branch, repository))
+				MakeRequest(t, req, http.StatusNotFound)
+			}
+		}
+	})
+}
--- a/web_src/svg/gitea-alpine.svg
+++ b/web_src/svg/gitea-alpine.svg
@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg version="1.1" viewBox="0 0 186 162" xml:space="preserve" xmlns="http://www.w3.org/2000/svg"><g transform="matrix(1.25 0 0 -1.25 -268 592)" fill="#0d597f"><g transform="translate(268 393)"><path d="m0 0v15.7l-11.3-11.3c1.22-0.847 2.36-1.54 3.44-2.11 1.08-0.567 2.09-1 3.03-1.34 0.941-0.334 1.81-0.562 2.62-0.71 0.804-0.147 1.54-0.213 2.21-0.222m57.8 1.3c0.02-0.017 0.13-0.11 0.333-0.239 0.204-0.13 0.502-0.297 0.898-0.462 0.395-0.164 0.889-0.327 1.48-0.448 0.596-0.122 1.29-0.202 2.1-0.202 0.671 0 1.41 0.059 2.22 0.2 0.812 0.142 1.69 0.367 2.64 0.699 0.953 0.333 1.98 0.773 3.07 1.34 1.09 0.572 2.26 1.28 3.5 2.14l-8.57 8.4-28.4 28.5-12.5-12.5-16.8 17.3-42.2-41.7c1.24-0.86 2.4-1.56 3.49-2.14 1.09-0.571 2.12-1.01 3.07-1.34 0.951-0.332 1.83-0.557 2.64-0.698 0.81-0.142 1.55-0.201 2.22-0.201 0.804 0 1.5 0.08 2.1 0.202 0.596 0.121 1.09 0.284 1.48 0.449 0.396 0.164 0.693 0.331 0.897 0.461s0.314 0.223 0.334 0.24l19.1 19.1 6.81 6.53 18.9-18.9 6.59-6.78c0.02-0.017 0.13-0.11 0.334-0.239 0.204-0.13 0.501-0.297 0.897-0.462 0.396-0.164 0.89-0.327 1.48-0.448 0.596-0.122 1.3-0.202 2.1-0.202 0.67 0 1.41 0.059 2.22 0.2 0.811 0.142 1.69 0.367 2.64 0.699 0.952 0.333 1.98 0.773 3.07 1.34 1.09 0.572 2.26 1.28 3.5 2.14l-15.1 14.8 2.82 2.82 13.1-13.1 7.64-7.57m-0.163 79 37.2-64.5-37.2-64.5h-74.5l-37.2 64.5 37.2 64.5z" fill="#0d597f"/></g><g transform="translate(303 412)"><path d="m0 0-9.91 9.9 0.705 0.709 9.98-9.87z" fill="#0d597f"/></g></g></svg>
				`@ -0,0 +1 @@`
				<svg xmlns="http://www.w3.org/2000/svg" xml:space="preserve" viewBox="0 0 186 162" class="svg gitea-alpine" width="16" height="16" aria-hidden="true"><g fill="#0d597f"><path d="M67 100.75V81.125L52.875 95.25a41.588 41.588 0 0 0 4.3 2.637c1.35.71 2.612 1.25 3.787 1.676a21.12 21.12 0 0 0 3.275.887c1.006.184 1.926.266 2.763.278m72.25-1.625c.025.02.163.137.416.298.255.163.628.372 1.123.578.494.205 1.111.409 1.85.56.745.152 1.612.252 2.625.252.838 0 1.762-.073 2.775-.25a20.93 20.93 0 0 0 3.3-.873 29.25 29.25 0 0 0 3.837-1.676 41.805 41.805 0 0 0 4.375-2.674l-10.712-10.5-35.5-35.625-15.625 15.625-21-21.625-52.75 52.125c1.55 1.075 3 1.95 4.362 2.675a28.324 28.324 0 0 0 3.838 1.675c1.189.414 2.287.696 3.3.872 1.012.177 1.937.251 2.775.251 1.005 0 1.875-.1 2.625-.252a9.726 9.726 0 0 0 1.85-.561c.495-.205.866-.414 1.121-.577s.393-.278.418-.3l23.875-23.875 8.512-8.162 23.625 23.625 8.238 8.475c.024.021.162.137.417.299.255.162.626.37 1.121.577.495.205 1.113.409 1.85.56.745.153 1.625.253 2.625.253.838 0 1.763-.074 2.775-.25a20.966 20.966 0 0 0 3.3-.874 29.323 29.323 0 0 0 3.838-1.675 41.805 41.805 0 0 0 4.375-2.675l-18.875-18.5 3.525-3.525 16.375 16.375 9.55 9.462m-.204-98.75 46.5 80.625-46.5 80.625H46.05L-.45 81.066 46.05.441z"/><path d="M110.75 77 98.363 64.625l.88-.886 12.476 12.337z"/></g></svg>