How to remove tags of the form 'X.Y.Z',

add_prefix_to_xyz_tags.sh

#! /usr/bin/env bash
set -e

# The prefix 'namespace' in tags of the form 'some_prefix/x.y.z'
PROJECT_PREFIX="some_prefix"

# Get all the current tags on the repository
TAGS=`git tag`

### ADD PREFIXES TO ALL THE 'X.Y.Z' TAGS
for TAG in $TAGS; do
    echo "Tag: $TAG"

    # If the tag doesn't fit the x.y.z form, skip it
    if ! [[ $TAG =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]] ; then
        echo "!!! tag doesn't match X.Y.Z pattern, skipping";
        continue;
    fi

    # Define what the new tag would look like
    NEW_TAG=$PROJECT_PREFIX/$TAG
    echo "--- new tag $NEW_TAG"

    # If the new tag already exists, skip it
    if `git rev-list $NEW_TAG.. >/dev/null 2>&1`; then
        echo "!!! new tag exists already, skipping"
        continue;
    fi

    # Add the new tag
    COMMIT=`git rev-parse $TAG`
    echo "*** ADDING NEW TAG $NEW_TAG for commit $COMMIT"
    git tag -a $NEW_TAG -m "Tagging $NEW_TAG" $COMMIT
done

refresh_local_tags.sh

#! /usr/bin/env bash
set -e 

# Remove all git tags from the working copy, and fetch all tags from the remote
git tag -l | xargs git tag -d && git fetch -t

remove_prefix_xyz_tags.sh

#! /usr/bin/env bash
set -e

# The prefix 'namespace' in tags of the form 'some_prefix/x.y.z'
PROJECT_PREFIX="some_prefix"

# Get all the current tags on the repository
TAGS=`git tag`

### REMOVE TAGS WITH THE ABOVE PREFIX
for TAG in $TAGS; do
    echo "Tag: $TAG"

    # If the tag doesn't match the form `prefix/x.y.z`, skip it, we're not deleting it
    if ! [[ $TAG =~ ^$PROJECT_PREFIX/[0-9]+\.[0-9]+\.[0-9]+$ ]] ; then
        echo "--- No Match, skipping"
        continue;
    fi

    echo "!!! Match, removing"
    git tag --delete $TAG

    # Also remove the tag from the origin remote
    git push origin :refs/tags/$TAG
done

remove_xyz_tags.sh

#! /usr/bin/env bash
set -e

# Get all the current tags on the repository
TAGS=`git tag`

### REMOVE TAGS WITH NO PREFIX
for TAG in $TAGS; do
    echo "Tag: $TAG"

    # If the tag doesn't match the form `x.y.z`, skip it, we're not deleting it
    if ! [[ $TAG =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]] ; then
        echo "--- No Match, skipping"
        continue;
    fi

    echo "!!! Match, removing"
    git tag --delete $TAG

    # Also remove the tag from the origin remote
    git push origin :refs/tags/$TAG
done