/
main.go
143 lines (117 loc) · 3.01 KB
/
main.go
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package main
import (
"fmt"
"os"
"path"
"sort"
"strings"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/client"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
"github.com/metal-stack/metal-lib/pkg/genericcli/printers"
"github.com/olekukonko/tablewriter"
)
type artifact struct {
image string
url string
checksumURL string
packagesURL string
}
func main() {
err := generate()
if err != nil {
panic(err)
}
}
func generate() error {
var (
dummyRegion = "dummy" // we don't use AWS S3, we don't need a proper region
endpoint = "metal-stack.io"
bucket = "images"
prefix = os.Getenv("PREFIX") // "metal-os/20230710"
)
ss, err := session.NewSession(&aws.Config{
Endpoint: &endpoint,
Region: &dummyRegion,
Credentials: credentials.AnonymousCredentials,
Retryer: client.DefaultRetryer{
NumMaxRetries: 3,
},
})
if err != nil {
return err
}
var (
client = s3.New(ss)
res = map[string]artifact{}
)
err = client.ListObjectsPages(&s3.ListObjectsInput{
Bucket: &bucket,
Prefix: &prefix,
}, func(objects *s3.ListObjectsOutput, lastPage bool) bool {
for _, o := range objects.Contents {
key := *o.Key
after, found := strings.CutPrefix(key, prefix)
if !found {
continue
}
base := path.Dir(key)
a := res[base]
url := fmt.Sprintf("https://%s.%s/%s%s", bucket, endpoint, prefix, after)
a.image = fmt.Sprintf("%s%s", prefix, path.Dir(after))
switch {
case strings.HasSuffix(key, ".tar.lz4"):
a.url = url
case strings.HasSuffix(key, ".md5"):
a.checksumURL = url
case strings.HasSuffix(key, ".txt"):
a.packagesURL = url
}
res[base] = a
}
return true
})
if err != nil {
return fmt.Errorf("cannot list s3 objects:%w", err)
}
var artifacts []*artifact
for _, a := range res {
a := a
artifacts = append(artifacts, &a)
}
return print(artifacts)
}
func print(artifacts []*artifact) error {
sort.Slice(artifacts, func(i, j int) bool {
return artifacts[i].url < artifacts[j].url
})
printerConfig := &printers.TablePrinterConfig{
Markdown: true,
}
p := printers.NewTablePrinter(printerConfig)
printerConfig.ToHeaderAndRows = func(data any, wide bool) ([]string, [][]string, error) {
p.MutateTable(func(table *tablewriter.Table) {
table.SetAutoWrapText(false)
})
switch data.(type) {
case []*artifact:
var (
header = []string{"IMAGE", "URL", "CHECKSUM", "PACKAGES"}
rows [][]string
)
for _, a := range artifacts {
a := a
url := fmt.Sprintf("[%s](%s)", path.Base(a.url), a.url)
checksum := fmt.Sprintf("[%s](%s)", path.Base(a.checksumURL), a.checksumURL)
packages := fmt.Sprintf("[%s](%s)", path.Base(a.packagesURL), a.packagesURL)
rows = append(rows, []string{a.image, url, checksum, packages})
}
return header, rows, nil
}
return nil, nil, fmt.Errorf("unsupported type for printing: %T", data)
}
fmt.Println("## Downloads")
return p.Print(artifacts)
}