sheyu

#!/usr/bin/env bash

#
# @author hxAri
# @create 24.04-2022
# @update -
# @github https://github.com/hxAri/Sheyu
#
# Copyright (c) 2022 hxAri <hxari@proton.me>
#
# GNU General Public License v3, 29 June 2007
#
# 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 3 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, see <https://www.gnu.org/licenses/>
#

# Clear terminal screen.
clear

# Target basename.
pathname=$(basename $0)

# Change current working directory.
cd $(dirname $0)

# Iterate down a (possible) chain of symlinks.
while [ -L "$pathname" ]
do
    pathname=$(readlink $pathname)
    cd $(dirname $pathname)
    pathname=$(basename $pathname)
done
 
# Get the Sheyu basepath.
basepath=$(pwd -P)

# By default the Sheyu saves the virtual environment activation
# location in a file called .virtual in the Project directory.
virtualization="${basepath}/.virtual"
virtual=

# For compatibility system.
if [[ ! $(command -v puts) ]]; then
	function puts() {
		echo -e "\x1b[0m$@"
	}
fi

# Handle setup python module requirements.
function modinstall() {
	local envfiname=$1
	read -e -p "$(puts "$envfiname: install python module requirements [Y/n] ")" installmod
	if [[ "${installmod^^}" == "Y" ]]; then
		source "$envfiname"
		if [[ $? -eq 0 ]]; then
			if [[ ! -f "${basepath}/requirements.txt" ]]; then
				puts "${basepath}/requirements.txt: no such file or directory"
				exit 1
			fi
			pip install -r "${basepath}/requirements.txt"
			if [[ $? -ne 0 ]]; then
				puts "${basepath}/requirements.txt: failed install module requirements"
				exit 1
			fi
			deactivate
			puts "${basepath}/requirements.txt: all module requirements installed"
			puts "please re-run this programs"
			exit 0
		else
			puts "$envfiname: failed to activate python virtual environment"
			exit 1
		fi
	else
		puts "$envfiname: aborted"
		exit 1
	fi
}

# Handle create python virtual environment.
function envcreate() {
	local envfiname=$1
	puts "$envfiname: creating virtual environment"
	python3 -m venv "$envfiname"
	if [[ $? -ne 0 ]]; then
		puts "$envfiname: failed create virtual environment"
		exit 1
	fi
	echo "$envfiname" > "$virtualization"
	if [[ $? -ne 0 ]]; then
		puts "$envfiname: failed create virtual environment"
		exit 1
	fi
	modinstall "$envfiname"
}

if [[ ! -f $virtualization ]]; then
	envfiname=
	puts "input virtual environment activation: e.g /home/$(whoami)/virtual/bin/activate"
	while [[ ! -f $virtualization ]]; do
		read -e -p "$(puts pathname:) " envfiname
		if [[ -f "$envfiname" ]]; then
			echo "$envfiname" > "$virtualization"
			if [[ $? -ne 0 ]]; then
				puts "$envfiname: failed create virtual environment"
				exit 1
			fi
			modinstall "$envfiname"
		elif [[ -d "$envfiname" ]]; then
			if [[ $(ls -A "$envfiname") ]]; then
				read -e -p "$(puts "${envfiname}: This directory is not empty are you sure [Y/n] ")" envforcec
				if [[ "${envforcec^^}" != "Y" ]]; then
					envfiname=
					continue
				fi
				envcreate "$envfiname"
			fi
		else
			puts "$envfiname: no such file or directory"
			read -e -p "$(puts "$envfiname: create the virtual environment here [Y/n] ")" envcreate
			if [[ "${envcreate^^}" != "Y" ]]; then
				envfiname=
				continue
			fi
			envcreate "$envfiname"
		fi
	done
fi

# Read saved Sheyu virtual environment activation.
virtual="$(cat $virtualization)"

# Clean Python cache Byte-Code compiled.
function clean() {
	for cache in $(find "${basepath}/" | grep "__pycache__"); do
		if [[ -d $cache ]]; then
			rm -rf $cache
			if [[ $? -ne 0 ]]; then
				puts "${cache}: failed remove directory"
			fi
		fi
	done
}

# Activate the python virtual environment.
source "$virtual"

if [[ $? -ne 0 ]]; then
	puts "$virtual: failed to activate python virtual environment"
fi

python3 "src/sheyu.py" "$@"
clean