add feature to find all tags referenced in a consuming project

[bicschneider]

As a user I would like to understand from a consuming repo which releases/tags that are used. It can be a prequisite for clean-up

#!/bin/bash
set -euo pipefail

export subm_path=$1

for sha1_root in $(git rev-list --all -- ${subm_path}) ; do 
    sha1_sub="$(git ls-tree $sha1_root ${subm_path} | cut -d " " -f 3 | cut -d$'\t' -f 1 )" || true

    if [ -z "${sha1_sub:-}" ]; then
        sha1_sub="(no submodule)"
    else
        git -C ${subm_path} rev-parse --verify $sha1_sub > /dev/null 2>&1 || {
            git -C ${subm_path} fetch origin $sha1_sub > /dev/null
            git artifact fetch-tags -s $sha1_sub > /dev/null
            git -C ${subm_path} rev-parse --verify $sha1_sub > /dev/null 2>&1 || {
                sha1_sub_ls_remote="(dead sha1)"    
            }
        }

        sha1_sub_ls_remote=$(git -C ${subm_path} ls-remote --tags origin | grep $sha1_sub | cut -d / -f 3-) || true
        
        if [ -z "${sha1_sub_ls_remote:-}" ]; then
            sha1_sub_ls_remote="(no tag)"
        fi
    fi

    remote_branches_contains_count=$(git branch -r --contains $sha1_root | wc -l)
    tags_contains_count=$(git tag --contains $sha1_root | wc -l)
    
    printf "%14.14s %-60.60s %-80.80s %-20.20s\n" \
                "$sha1_sub" \
                "$sha1_sub_ls_remote" \
                "$(git log --oneline -1 --decorate $sha1_root | cut -c1-90)" \
                "(ct.br:$remote_branches_contains_count ct.t:${tags_contains_count})" \

done