toolkit/sync/latest-images/main.go

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package main
import (
"fmt"
"log"
"regexp"
"strconv"
"strings"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
"github.com/spf13/cobra"
)
type Image struct {
Type string
Architecture string
Variant string
Version string
Date time.Time
File string
FilePath string
}
func FindRecentImages(bucketName string, prefix string, version string, imageType string, variant string, date string, fileType string) ([]Image, error) {
s3session := session.Must(session.NewSession())
svc := s3.New(s3session, &aws.Config{Region: aws.String("us-east-2")})
result := []Image{}
parts := strings.Split(version, ".")
major := parts[0]
minor := parts[1]
if prefix == "" {
prefix = fmt.Sprintf("buildimage-%s.%s-", major, minor)
}
// Build the S3 key prefix for the given parameters
// @todo: support passing the other parameters
keyPrefix := fmt.Sprintf("%s",
prefix)
log.Printf("Looking for images in the following format: %s", keyPrefix)
var items []*s3.Object
// List the objects in the S3 bucket with the given prefix
input := &s3.ListObjectsV2Input{
Bucket: aws.String(bucketName),
Prefix: aws.String(keyPrefix),
}
err := svc.ListObjectsV2Pages(input, func(page *s3.ListObjectsV2Output, lastPage bool) bool {
items = append(items, page.Contents...)
return true
})
log.Printf("Found %d images in our search", len(items))
if err != nil {
log.Fatalf("uh oh: %v", err)
}
pattern := regexp.MustCompile(`(?P<whole>Rocky-(?P<major>[0-9]+)-(?P<type>\w+)(?:-(?P<variant>\w+))?-(?:[0-9]+)\.(?P<minor>[0-9])-(?P<date>[0-9]+)\.(?P<epoch>[0-9]+)\.(?P<architecture>\w+)/(?P<datestamp>[0-9]+)/(?P<file>(.+\.(?P<extension>(box|qcow2|raw|tar\.xz|vhd)))))$`)
// Loop through the objects and find the latest one for each file type
latestByTypeVariant := map[string]map[string]*Image{}
for _, obj := range items {
key := *obj.Key
match := pattern.FindStringSubmatch(key)
if len(match) == 0 {
// log.Printf("key did not match pattern, %s : %s\n", key, pattern)
continue
}
date, err := strconv.ParseInt(match[pattern.SubexpIndex("datestamp")], 10, 64)
if err != nil {
log.Fatalf("uh oh dates are fun! %v", err)
}
imageType := match[pattern.SubexpIndex("type")]
variant := match[pattern.SubexpIndex("variant")]
image := Image{
Type: imageType,
Variant: variant,
Version: match[pattern.SubexpIndex("major")],
// FilePath: match[pattern.SubexpIndex("whole")],
File: match[pattern.SubexpIndex("file")],
Architecture: match[pattern.SubexpIndex("architecture")],
Date: time.Unix(date, 0),
}
typeVariant := image.Type
if image.Variant != "" {
typeVariant = fmt.Sprintf("%s-%s", typeVariant, image.Variant)
}
// Early images of these two types were named differently.. Skip them
if typeVariant == "GenericCloud" || typeVariant == "EC2" {
continue
}
latest, ok := latestByTypeVariant[typeVariant][image.Architecture]
if !ok || image.Date.After(latest.Date) {
if latestByTypeVariant[typeVariant] == nil {
latestByTypeVariant[typeVariant] = map[string]*Image{}
}
latestByTypeVariant[typeVariant][image.Architecture] = &image
}
}
// Convert the map to an array
for _, architecture := range latestByTypeVariant {
for _, image := range architecture {
result = append(result, *image)
}
}
return result, nil
}
func main() {
var bucket, prefix, imageType, variant, fileType, date string
// Set up the root command with flags
var rootCmd = &cobra.Command{
Use: "find-latest-images VERSION",
Short: "Lists the most recent S3 images based on certain criteria",
Long: `Lists the most recent S3 images based on the image version, type, variant, and date`,
Args: cobra.ExactArgs(1),
Run: func(cmd *cobra.Command, args []string) {
// version is the only positional arg.
version := args[0]
// Call the function to list the S3 images based on the provided criteria
res, err := FindRecentImages(bucket, prefix, version, imageType, variant, date, fileType)
if err != nil {
fmt.Println(fmt.Errorf("IDK yo: %v", err))
}
for _, image := range res {
fmt.Println(image)
}
},
}
// Set up the command flags
rootCmd.Flags().StringVar(&bucket, "bucket", "resf-empanadas", "The name of the S3 bucket")
rootCmd.Flags().StringVar(&prefix, "prefix", "", "The prefix for the S3 key")
rootCmd.Flags().StringVar(&imageType, "type", "", "The image type")
rootCmd.Flags().StringVar(&variant, "variant", "", "The image variant")
rootCmd.Flags().StringVar(&fileType, "file-type", "", "The image file type")
rootCmd.Flags().StringVar(&date, "date", time.Now().Format("20060102"), "The date of the images to list (in YYYYMMDD format)")
// Set up the CLI
if err := rootCmd.Execute(); err != nil {
fmt.Println("Error:", err)
}
}