fix-index-images.sh

#!/bin/bash

set -eu
shopt -s nullglob

if [[ -n ${RUN:-} ]]; then
    dry=
else
    dry=echo
fi

function keep_valid_tag() {
    local readonly index_file=$1
    local readonly tag_file=$2

    local readonly tag_name=$(basename "${tag_file}" | sed 's@^tag_@@')
    local readonly tag_id=$(cat "${tag_file}")

    # Find tags that are not the correct ID, and remove them
    jq -c -M ". - [.[] | select(.Tag == \"$tag_name\" and .id != \"$tag_id\")]" $index_file
}

function fix_repository() {
    local readonly repo_dir=$1

    local readonly infile=$(mktemp -t fix-images-XXXX)
    local readonly outfile=$(mktemp -t fix-images-XXXX)

    cp $repo_dir/_index_images $infile

    for tag in $repo_dir/tag_*; do
    	keep_valid_tag $infile $tag > $outfile

        mv $outfile $infile
    done

    $dry mv $repo_dir/_index_images $repo_dir/_index_images.original
    $dry mv $infile $repo_dir/_index_images
}

for repo_dir in $@;	do
    echo "Processing repository $(basename $repo_dir)" >&2
    fix_repository $repo_dir
done