wpgit

#!/bin/bash
#
# Check out a common git repository of WordPress
#
# VERSION       :0.2.0
# DATE          :2015-08-17
# AUTHOR        :Viktor Szépe <viktor@szepe.net>
# LICENSE       :The MIT License (MIT)
# URL           :https://github.com/szepeviktor/debian-server-tools
# BASH-VERSION  :4.2+
# DOCS          :https://git-scm.com/blog/2011/07/11/reset.html
# DEPENDS       :apt-get install git
# ORIGIN        :https://github.com/WordPress/WordPress.git
# LOCATION      :/usr/local/bin/wpgit

# Usage
#
# Check out tag 4.2.4
#
#     wpgit 4.2.4
#
# Display current status (like `wp core verify-checksums`)
#
#     wpgit

export GIT_DIR="/usr/local/src/wordpress.git"

if [ $# == 1 ]; then
    TAG="$1"

    # Update HEAD and index only
    git fetch --prune --tags origin master
    ORIGIN_LATEST_COMMIT="$(git rev-list origin/master | head -n 1)"
    git reset "$ORIGIN_LATEST_COMMIT"

    # Check tag
    if ! git rev-parse --verify --quiet "$TAG" > /dev/null; then
        echo "ERROR: $?, last 20 tags: $(git tag | tail -n 20 | paste -s -d " ")" 1>&2
        exit 1
    fi

    # Update working tree
    git checkout "$TAG" -- .
fi

# @WIP

# Show differences from a given tag
#TAG_COMMIT="$(git rev-list "$TAG" | head -n 1)"
#git diff "${TAG_COMMIT}^1" -- .

# Show untracked files
#git status --short | grep "^? "