List images in local container image registry if using docker.io/library/registry image

local-registry-images.sh

#!/bin/bash

# Set the registry URL
registry_url="http://localhost:5005"

# List repositories
repositories=$(curl -s "${registry_url}/v2/_catalog" | jq -r '.repositories[]')

# List tags for each repository
for repo in ${repositories}; do
    echo "Repository: ${repo}"
    curl -s "${registry_url}/v2/${repo}/tags/list" | jq -r '.tags[]' | while read tag; do
        echo "  Tag: ${tag}"
   
        # Fetch the manifest or index
        response=$(curl --silent --header "Accept: application/vnd.oci.image.index.v1+json, application/vnd.docker.distribution.manifest.v2+json" \
                --request GET ${registry_url}/v2/${repo}/manifests/${tag})
        response_including_headers=$(curl --silent --header "Accept: application/vnd.oci.image.index.v1+json, application/vnd.docker.distribution.manifest.v2+json" \
                --request GET ${registry_url}/v2/${repo}/manifests/${tag} --include)

        # Check if it's an index or a manifest
        if echo "${response_including_headers}" | grep -q "application/vnd.oci.image.index.v1+json"; then            
            # Parse index and fetch specific manifests (example might require modification based on your specific needs)
            # This part depends on how you parse and what tool you use (e.g., jq, python, etc.)
            tag_digest=$(echo "${response}" | jq --raw-output '.manifests[].digest')
            echo -e "\t\tchecksum: ${tag_digest}"
            image_size=$(echo "${response}" | jq --raw-output '.manifests[].size')
            echo -e "\t\tsize: ${image_size}"
        fi
    done
done