github.com/abemedia/appcast@v0.4.0/integrations/apk/build.go (about)

     1  package apk
     2  
     3  import (
     4  	"context"
     5  	"io/fs"
     6  	"os"
     7  	"path"
     8  	"strings"
     9  	"unsafe"
    10  
    11  	"github.com/abemedia/appcast/pkg/crypto/rsa"
    12  	"github.com/abemedia/appcast/source"
    13  	"github.com/abemedia/appcast/target"
    14  	"gitlab.alpinelinux.org/alpine/go/repository"
    15  )
    16  
    17  type Config struct {
    18  	Source     *source.Source
    19  	Version    string
    20  	Prerelease bool
    21  	Target     target.Target
    22  	RSAKey     *rsa.PrivateKey
    23  	KeyName    string
    24  }
    25  
    26  //nolint:funlen
    27  func Build(ctx context.Context, c *Config) error {
    28  	repo, err := openRepo(ctx, c.Target)
    29  	if err != nil {
    30  		return err
    31  	}
    32  	defer os.RemoveAll(repo.dir)
    33  
    34  	version := c.Version
    35  	if v := getVersionConstraint(repo.repos); v != "" {
    36  		version += "," + v
    37  	}
    38  
    39  	releases, err := c.Source.ListReleases(ctx, &source.ListOptions{
    40  		Version:    version,
    41  		Prerelease: c.Prerelease,
    42  	})
    43  	if err == source.ErrNoReleaseFound {
    44  		return nil
    45  	}
    46  	if err != nil {
    47  		return err
    48  	}
    49  
    50  	var hasReleases bool
    51  	for _, release := range releases {
    52  		for _, asset := range release.Assets {
    53  			if path.Ext(asset.Name) != ".apk" {
    54  				continue
    55  			}
    56  			b, err := c.Source.DownloadAsset(ctx, release.Version, asset.Name)
    57  			if err != nil {
    58  				return err
    59  			}
    60  			if err = repo.Add(b); err != nil {
    61  				return err
    62  			}
    63  			hasReleases = true
    64  		}
    65  	}
    66  	if !hasReleases {
    67  		return nil
    68  	}
    69  
    70  	if err = repo.Write(c.RSAKey, c.KeyName); err != nil {
    71  		return err
    72  	}
    73  
    74  	files := os.DirFS(repo.dir)
    75  	err = fs.WalkDir(files, ".", func(path string, d fs.DirEntry, err error) error {
    76  		if err != nil || d.IsDir() {
    77  			return err
    78  		}
    79  		b, err := fs.ReadFile(files, path)
    80  		if err != nil {
    81  			return err
    82  		}
    83  		w, err := c.Target.NewWriter(ctx, path)
    84  		if err != nil {
    85  			return err
    86  		}
    87  		if _, err = w.Write(b); err != nil {
    88  			return err
    89  		}
    90  		return w.Close()
    91  	})
    92  	if err != nil {
    93  		return err
    94  	}
    95  
    96  	return nil
    97  }
    98  
    99  func getVersionConstraint(repo map[string]*repository.ApkIndex) string {
   100  	if len(repo) == 0 {
   101  		return ""
   102  	}
   103  
   104  	replace := strings.NewReplacer("_p", "+", "_", "-")
   105  	v := make([]byte, 0)
   106  	for _, r := range repo {
   107  		for _, p := range r.Packages {
   108  			v = append(v, '!', '=')
   109  			v = append(v, replace.Replace(p.Version)...)
   110  			v = append(v, ',')
   111  		}
   112  	}
   113  
   114  	return unsafe.String(unsafe.SliceData(v), len(v)-1)
   115  }