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build.go
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build.go
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package apk
import (
"context"
"io/fs"
"os"
"path"
"strings"
"unsafe"
"github.com/abemedia/appcast/pkg/crypto/rsa"
"github.com/abemedia/appcast/source"
"github.com/abemedia/appcast/target"
"gitlab.alpinelinux.org/alpine/go/repository"
)
type Config struct {
Source *source.Source
Version string
Prerelease bool
Target target.Target
RSAKey *rsa.PrivateKey
KeyName string
}
//nolint:funlen
func Build(ctx context.Context, c *Config) error {
repo, err := openRepo(ctx, c.Target)
if err != nil {
return err
}
defer os.RemoveAll(repo.dir)
version := c.Version
if v := getVersionConstraint(repo.repos); v != "" {
version += "," + v
}
releases, err := c.Source.ListReleases(ctx, &source.ListOptions{
Version: version,
Prerelease: c.Prerelease,
})
if err == source.ErrNoReleaseFound {
return nil
}
if err != nil {
return err
}
var hasReleases bool
for _, release := range releases {
for _, asset := range release.Assets {
if path.Ext(asset.Name) != ".apk" {
continue
}
b, err := c.Source.DownloadAsset(ctx, release.Version, asset.Name)
if err != nil {
return err
}
if err = repo.Add(b); err != nil {
return err
}
hasReleases = true
}
}
if !hasReleases {
return nil
}
if err = repo.Write(c.RSAKey, c.KeyName); err != nil {
return err
}
files := os.DirFS(repo.dir)
err = fs.WalkDir(files, ".", func(path string, d fs.DirEntry, err error) error {
if err != nil || d.IsDir() {
return err
}
b, err := fs.ReadFile(files, path)
if err != nil {
return err
}
w, err := c.Target.NewWriter(ctx, path)
if err != nil {
return err
}
if _, err = w.Write(b); err != nil {
return err
}
return w.Close()
})
if err != nil {
return err
}
return nil
}
func getVersionConstraint(repo map[string]*repository.ApkIndex) string {
if len(repo) == 0 {
return ""
}
replace := strings.NewReplacer("_p", "+", "_", "-")
v := make([]byte, 0)
for _, r := range repo {
for _, p := range r.Packages {
v = append(v, '!', '=')
v = append(v, replace.Replace(p.Version)...)
v = append(v, ',')
}
}
return unsafe.String(unsafe.SliceData(v), len(v)-1)
}