Git Tag Manager ... Paginate through Git Tags matching a wildcard pattern and provide ability to delete tags

git-tag-mgr.sh

#!/bin/bash
#
# I have this saved to /usr/local/bin/gtmgr (git tag manager)
# and chmod +x it, or paste it into your bash profile and alias it.
#
# Run `gtmgr` in the context of your repo root on your local machine.
# The script will present you with a portion of your tags matching pattern.
# 
# Sample Usage
# --------------------------------------------------------------------------
#
# 08:55:35 me@mybox myrepo ±|JIRA-123|→ gtmgr
# Enter the wildcard pattern to match tags (e.g., 'v*'):
# *staging*
# 
# Page 1 of 80
# ---------------------------------------
# 1) 1.4.310-staging - Created on: 2022-10-03 13:16:10 +0300
# 2) 1.4.314-staging - Created on: 2022-10-04 00:04:53 -0400
# 3) 1.4.315-staging - Created on: 2022-10-04 12:27:17 +0300
# 4) 1.4.343-staging - Created on: 2022-10-14 13:29:20 +0300
# 5) 1.4.344-staging - Created on: 2022-10-17 13:41:44 -0700
# 6) 1.4.345-staging - Created on: 2022-10-17 14:18:08 -0700
# 7) 1.4.474-staging - Created on: 2023-05-16 20:36:33 +0000
# 8) v1.0.0-staging - Created on: 2021-12-21 11:14:49 -0700
# 9) v1.0.001-staging - Created on: 2023-06-07 13:22:03 +0200
# 10) v1.0.002-staging - Created on: 2023-06-07 15:05:40 +0200
# 
# [N] Next Page | [P] Previous Page | [D] Delete Tag | [Q] Quit
# Choose an option:
#


# Function to manage Git tags with pagination
manage_tags_with_pagination() {
    # Read the wildcard pattern from the user
    echo "Enter the wildcard pattern to match tags (e.g., 'v*'): "
    read -r pattern

    # Find matching tags
    matching_tags=($(git tag -l "$pattern"))
    total_tags=${#matching_tags[@]}

    if [[ $total_tags -eq 0 ]]; then
        echo "No tags found matching pattern '$pattern'."
        exit 1
    fi

    # Pagination setup
    page_size=10
    current_page=0
    total_pages=$(( (total_tags + page_size - 1) / page_size ))  # Calculate total pages

    show_page() {
        echo
        echo "Page $((current_page + 1)) of $total_pages"
        echo "---------------------------------------"

        start=$((current_page * page_size))
        end=$((start + page_size - 1))
        if ((end >= total_tags)); then end=$((total_tags - 1)); fi

        for i in $(seq $start $end); do
            tag=${matching_tags[$i]}
            tag_date=$(git log -1 --format="%ai" "$tag")
            echo "$((i + 1))) $tag - Created on: $tag_date"
        done

        echo
        echo "[N] Next Page | [P] Previous Page | [D] Delete Tag | [Q] Quit"
        echo "Choose an option:"
    }

    delete_tag() {
        echo "Enter the number corresponding to the tag you want to delete:"
        read -r choice
        if [[ "$choice" =~ ^[0-9]+$ && $choice -ge 1 && $choice -le $total_tags ]]; then
            tag_to_delete=${matching_tags[$((choice - 1))]}
            echo "Deleting tag '$tag_to_delete'..."
            git tag -d "$tag_to_delete"  # Delete the local tag
            git push origin --delete "$tag_to_delete"  # Delete the remote tag (if applicable)
            echo "Tag '$tag_to_delete' deleted locally and remotely (if it existed)."

            # Remove the tag from the array and adjust indices
            unset 'matching_tags[$((choice - 1))]'
            matching_tags=("${matching_tags[@]}")  # Rebuild the array
            total_tags=${#matching_tags[@]}
            total_pages=$(( (total_tags + page_size - 1) / page_size ))
        else
            echo "Invalid choice. Please try again."
        fi
    }

    # Main loop
    while true; do
        show_page
        read -r option

        case $option in
        N|n)
            if ((current_page < total_pages - 1)); then
                ((current_page++))
            else
                echo "You are already on the last page."
            fi
            ;;
        P|p)
            if ((current_page > 0)); then
                ((current_page--))
            else
                echo "You are already on the first page."
            fi
            ;;
        D|d)
            delete_tag
            if ((current_page >= total_pages)); then
                current_page=$((total_pages - 1))  # Adjust if we delete the last tag on the last page
            fi
            ;;
        Q|q)
            echo "Exiting."
            break
            ;;
        *)
            echo "Invalid option. Please choose N, P, D, or Q."
            ;;
        esac
    done
}

# Run the function
manage_tags_with_pagination