docker-hub-repos-tags.sh

#!/bin/bash

if [ "$#" -lt 1 ] || [ "$#" -gt 2 ]; then
    echo "Usage: $0 <repository_name> [output_file]"
    exit 1
fi

REPOSITORY_NAME="$1"
OUTPUT_FILE="$2"

BASE_URL="https://registry.hub.docker.com/v2/repositories/$REPOSITORY_NAME/tags"
PAGE=1
PAGE_SIZE=100
TOTAL_COUNT=$(curl -s "$BASE_URL" | jq -r '.count')

# --
declare -a TAGS_ARRAY
while [ $(( (PAGE - 1) * PAGE_SIZE )) -lt "$TOTAL_COUNT" ]; do
    TAGS=$(curl -s "$BASE_URL?page=$PAGE&page_size=$PAGE_SIZE" | jq -r '.results[] | {name: .name, last_pushed: .tag_last_pushed}')
    TAGS_ARRAY+=("$TAGS")
    PAGE=$((PAGE + 1))
done
SORTED_TAGS=$(printf "%s\n" "${TAGS_ARRAY[@]}" | jq -s 'sort_by(.last_pushed) | reverse')

ALL_TAGS=""
for tag in $(echo "$SORTED_TAGS" | jq -r '.[] | .name'); do
    ALL_TAGS+="$tag"$'\n'
done
# --

echo -e "$ALL_TAGS"
if [ -n "$OUTPUT_FILE" ]; then
    echo -e "$ALL_TAGS" > "$OUTPUT_FILE"
    echo "All tag names have been saved to $OUTPUT_FILE."
fi