getImagetag.go

package main

import (
	"encoding/json"
	"fmt"
	"io/ioutil"
	"log"
	"net/http"
)

type tags struct {
		Name           string `json:"name"`
		Reversion      bool   `json:"reversion"`
		StartTs        int    `json:"start_ts"`
		ManifestDigest string `json:"manifest_digest"`
		IsManifestList bool   `json:"is_manifest_list"`
		Size           int    `json:"size"`
		LastModified   string `json:"last_modified"`
		EndTs          int    `json:"end_ts,omitempty"`
		Expiration     string `json:"expiration,omitempty"`
}

type tagResp struct {
	Tags []tags `json:"tags"`
}

func main() {
	resp, err := http.Get("https://quay.io/api/v1/repository/praveenkumar/sample/tag/?onlyActiveTags=true&limit=50")
	if err != nil {
		log.Fatal(err)
	}
	defer resp.Body.Close()

	data, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		log.Fatal(err)
	}

	tagsResp := tagResp{}
	err = json.Unmarshal(data, &tagsResp)
	if err != nil {
		log.Fatal(err)
	}
	releaseTag := "2.4"
	manifestDigest := getManifestDigest(releaseTag, tagsResp)
	fmt.Println(getBundleVersion(manifestDigest, tagsResp))

}

func getManifestDigest(releaseTag string, tagsResp tagResp) string {
	for _, tag := range tagsResp.Tags {
		if tag.Name == releaseTag {
			return tag.ManifestDigest
		}
	}
	return ""
}

func getBundleVersion(manifestDigest string, tagsResp tagResp) string {
	for _, tag := range tagsResp.Tags {
		if tag.ManifestDigest == manifestDigest {
			return tag.Name
		}
	}
	return ""
}

$ curl -H "Accept: application/json"  https://quay.io/api/v1/repository/praveenkumar/sample/tag/?onlyActiveTags=true | jq .
{
  "tags": [
    {
      "name": "v2",
      "reversion": false,
      "start_ts": 1655109107,
      "manifest_digest": "sha256:124b84e904576c7a06929e78d8bb8e0f7f8b0c8a1590a48f45e81fbea572928f",
      "is_manifest_list": false,
      "size": 129,
      "last_modified": "Mon, 13 Jun 2022 08:31:47 -0000"
    },
    {
      "name": "2.4",
      "reversion": false,
      "start_ts": 1655109099,
      "manifest_digest": "sha256:124b84e904576c7a06929e78d8bb8e0f7f8b0c8a1590a48f45e81fbea572928f",
      "is_manifest_list": false,
      "size": 129,
      "last_modified": "Mon, 13 Jun 2022 08:31:39 -0000"
    },
    {
      "name": "v1",
      "reversion": false,
      "start_ts": 1655107779,
      "manifest_digest": "sha256:bf6bda1aa8698556723363dd987fac20f0f42bf1ffcf95c06016ac18bb6edfc0",
      "is_manifest_list": false,
      "size": 108,
      "last_modified": "Mon, 13 Jun 2022 08:09:39 -0000"
    }
  ],
  "page": 1,
  "has_additional": false
}