#!/bin/bash
#
# git-paranoia: for those parnaoid about what goes into releases based on git.
#
# Copyright 2012  Luis R. Rodriguez <mcgrof@do-not-panic.com>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the Free
# Software Foundation; either version 2 of the License, or (at your option)
# any later version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
# more details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Software Foundation, Inc., 59
# Temple Place - Suite 330, Boston, MA  02111-1307, USA.

# Pretty colors
GREEN="\033[01;32m"
YELLOW="\033[01;33m"
NORMAL="\033[00m"
BLUE="\033[34m"
RED="\033[31m"
PURPLE="\033[35m"
CYAN="\033[36m"
UNDERLINE="\033[02m"

INTERACTIVE="0"
RUN_CLEAN="0"

function usage()
{
	echo -e "Usage: ${GREEN}$1${NORMAL} ${BLUE}[ -i ]${NORMAL}"
	echo -e "-i\tInteractive, allows user to override paranoia"
	echo -e "-c\tRuns git clean -x -d for you. Not for the faint of heart"
	echo
	echo -e "Example usage:"
	echo
	echo -e "export GIT_DIRS=\"${HOME}/linux-stable/ ${HOME}/linux-next\""
	echo -e "$1"
	echo
	exit
}

function __git_paranoia()
{
        for i in $GIT_DIRS; do
		if [[ ! -d $i ]]; then
			echo -e "${BLUE}$i${NORMAL} does not exist"
			return 1
		fi

                cd $i;

		if [[ "$RUN_CLEAN" = "1" ]]; then
				git clean -x -d -f
		fi

                printf "Verifying ${BLUE}%15s\t${CYAN}%40s\t" $(basename $i) $(git describe)
                git tag -v $(git describe --dirty) > /dev/null 2>&1
                if [[ $? -ne 0 || $(git status -s | wc -l) -ne 0 ]]; then
                        echo -e "[${RED}FAILED${NORMAL}]"
			# We're paranoid, not only do we want the git tag to be GPG signed
			# but we also want *no* unepxected content on the releases! If you have
			# any files that do not belong into the git tree, nuke them, we won't do it
			# for you!
			if [[ $(git status -s | wc -l) -ne 0 || $(git clean -x -d -n | wc -l) -ne 0 ]]; then
				echo -e "Detected some content which likely should not be released."
				echo -e "In order to fix either run 'git clean -x -d -f' yourself or"
				echo -e "run '$0 -c'"
				echo -e ""
				echo -e "Not commited content: (run: git clean -x -d -f to fix)"
				git status -s
				git clean -x -d -n | sed 's|^Would|Should|g'
			fi
			return 1
                else
                        echo -e "[${GREEN}OK!${NORMAL}]"
                fi
        done
}

if [[ -z $GIT_DIRS ]]; then
	GIT_DIRS="${PWD}"
	STAT="$(git status > /dev/null 2>&1 && echo $?)"
	if [[ $STAT -ne 0 ]]; then
		echo -e "${RED}Error${NORMAL}:"
		echo -e "${PWD} not a git tree. Jump into one or set the "
		echo -e "${CYAN}GIT_DIRS${NORMAL} environment variable with your list of git trees"
		echo
		usage $0
		exit 1
	fi
fi

while [ $# -ne 0 ]; do
	if [[ "$1" = "-i" ]]; then
		INTERACTIVE="1"
                shift; continue;
        fi
	if [[ "$1" = "-c" ]]; then
		RUN_CLEAN="1"
                shift; continue;
        fi
        echo -e "Unexpected argument passed: ${RED}${1}${NORMAL}"
        usage $0
        exit
done

__git_paranoia

if [[ $? -ne 0 ]]; then
	echo
        echo -e "Detected some tree content is not yet ${RED}GPG signed${NORMAL}..."
	if [[ "$INTERACTIVE" = "0" ]]; then
		exit 1
	fi

	read -p "Do you still want to continue (y/N)? "
	if [[ "${REPLY}" != "y" ]]; then
	    echo -e "Bailing out !"
	    exit 1
	fi
fi

exit 0