#!/bin/sh

################################################################################
# Copyright 2022 Charadon                                                      #
#                                                                              #
# Licensed under the Apache License, Version 2.0 (the "License");              #
# you may not use this file except in compliance with the License.             #
# You may obtain a copy of the License at                                      #
#                                                                              #
# http://www.apache.org/licenses/LICENSE-2.0                                   #
#                                                                              #
# Unless required by applicable law or agreed to in writing, software          #
# distributed under the License is distributed on an "AS IS" BASIS,            #
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.     #
# See the License for the specific language governing permissions and          #
# limitations under the License.                                               #
################################################################################

set -e
cd "$(dirname "$0")"
. "$(pwd -P)/config.sh"

################################################################################

# Move script to background if DSCIP_DAEMON_FORK is set to true #
if [ "$DSCIP_DAEMON" = "true" ]; then
	if [ "$DSCIP_DAEMON_FORK" = "true" ] && [ ! "$FORKED" = "true" ]; then
		FORKED=true nohup "$0" "$@" > /dev/null 2>&1
		exit 0
	fi
fi

# If chroot is on, check if the user running this script is root.              #
# Root is needed for chroot to work.                                           #
if [ "$DSCIP_CHROOT" = "true" ]; then
		if [ ! "$(whoami)" = "root" ]; then
				echo "You need to run this script as root to use chroot."
				exit 1
		fi
		if [ ! "$DSCIP_GITMODE" = "clone" ]; then
				echo "DSCIP_GITMODE needs to be in clone mode to use chroot."
				exit 1
		fi
		CHROOT_DIRECTORY="jail/"
else
		CHROOT_DIRECTORY=""
fi

# Check if script is currently running, and if not, reset LOCK #
if [ -f "$WORKING_DIRECTORY/LOCK" ]; then
	LOCKED_PID=$(cat "$WORKING_DIRECTORY/LOCK")
	if ps -p "$LOCKED_PID" > /dev/null; then
		echo "Script still running. Exiting..."
		exit 0
	else
		echo "Script not running, resetting lock..."
		rm "$WORKING_DIRECTORY/LOCK"
	fi
fi

echo "$$" > "$WORKING_DIRECTORY/LOCK"



build () {
	# Print variables #
	{
		echo "################################################################################";
		date;
		echo "################################################################################";
		echo "DSCIP_GITREPO=$DSCIP_GITREPO";
		echo "DSCIP_GITMODE=$DSCIP_GITMODE";
		echo "DSCIP_BRANCH=$DSCIP_BRANCH";
		echo "WORKING_DIRECTORY=$WORKING_DIRECTORY";
		echo "DSCIP_PRE_CMD=$DSCIP_PRE_CMD";
		echo "DSCIP_BUILD_CMD=$DSCIP_BUILD_CMD";
		echo "DSCIP_POST_CMD=$DSCIP_POST_CMD";
		echo "DSCIP_DAEMON=$DSCIP_DAEMON";
		echo "DSCIP_DAEMON_FORK=$DSCIP_DAEMON_FORK";
		echo "DSCIP_SLEEP=$DSCIP_SLEEP";
		echo "DSCIP_DISREGARD_COMMIT_CHECK=$DSCIP_DISREGARD_COMMIT_CHECK";
		echo "DSCIP_OUTPUT_TO=$DSCIP_OUTPUT_TO"
	} >> "$DSCIP_OUTPUT_TO"

	# Grab remote sources #
	if [ "$DSCIP_GITMODE" = "clone" ]; then
		if [ "$DSCIP_CHROOT" = "true" ]; then
			. "$WORKING_DIRECTORY"/chroot_file_list.sh >> "$DSCIP_OUTPUT_TO"
			git clone --depth 1 -b "$DSCIP_BRANCH" "$DSCIP_GITREPO" "$WORKING_DIRECTORY/$CHROOT_DIRECTORY/wrkdir" >> "$DSCIP_OUTPUT_TO" 2>&1
		else
			rm -rf "$WORKING_DIRECTORY/$CHROOT_DIRECTORY/wrkdir" # Clean Up #
			git clone --depth 1 -b "$DSCIP_BRANCH" "$DSCIP_GITREPO" "$WORKING_DIRECTORY"/wrkdir >> "$DSCIP_OUTPUT_TO" 2>&1 # Clone git #
		fi
	elif [ "$DSCIP_GITMODE" = "pull" ]; then
		if [ ! -d "$WORKING_DIRECTORY/$CHROOT_DIRECTORY/wrkdir" ]; then
			git clone --depth 1 -b "$DSCIP_BRANCH" "$DSCIP_GITREPO" "$WORKING_DIRECTORY"/wrkdir >> "$DSCIP_OUTPUT_TO" 2>&1
		fi
		cd wrkdir
		git pull >> "$DSCIP_OUTPUT_TO" 2>&1
	else
		echo "Invalid GITMODE, choose either 'clone' or 'pull'" 2>> "$DSCIP_OUTPUT_TO"
		exit 1
	fi

	if [ "$DSCIP_CHROOT" = "true" ]; then
		chroot () {
			cp "$DSCIP_BUILD_CMD" "$WORKING_DIRECTORY/$CHROOT_DIRECTORY/build.sh"
			"$(which chroot)" "$WORKING_DIRECTORY/$CHROOT_DIRECTORY" sh -xc "cd wrkdir && . /build.sh"
		}
	else
		chroot () {
			. "$1"
		}
	fi

	{
		cd "$WORKING_DIRECTORY/$CHROOT_DIRECTORY/wrkdir";
		echo "Running pre-build commands...";
		"$DSCIP_PRE_CMD";
		echo "Running build commands...";
		cd "$WORKING_DIRECTORY/$CHROOT_DIRECTORY/wrkdir";
		chroot "$DSCIP_BUILD_CMD";
		echo "Running post-build commands...";
		cd "$WORKING_DIRECTORY/$CHROOT_DIRECTORY/wrkdir";
		"$DSCIP_POST_CMD";
	} >> "$DSCIP_OUTPUT_TO" 2>&1
	echo "$CURRENT_COMMIT" > "$WORKING_DIRECTORY/LAST_COMMIT" # Save commit #
}

run () {
	mkdir -p "$WORKING_DIRECTORY"
	cd "$WORKING_DIRECTORY"

	# Loads last commit ha<style>pre { line-height: 125%; }
td.linenos .normal { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
span.linenos { color: inherit; background-color: transparent; padding-left: 5px; padding-right: 5px; }
td.linenos .special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
span.linenos.special { color: #000000; background-color: #ffffc0; padding-left: 5px; padding-right: 5px; }
.highlight .hll { background-color: #ffffcc }
.highlight .c { color: #888888 } /* Comment */
.highlight .err { color: #a61717; background-color: #e3d2d2 } /* Error */
.highlight .k { color: #008800; font-weight: bold } /* Keyword */
.highlight .ch { color: #888888 } /* Comment.Hashbang */
.highlight .cm { color: #888888 } /* Comment.Multiline */
.highlight .cp { color: #cc0000; font-weight: bold } /* Comment.Preproc */
.highlight .cpf { color: #888888 } /* Comment.PreprocFil