install.sh

#!/bin/bash
#
#   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.
#

# Helper variables
cxdev_bashrc="${HOME}/.bashrc"
cxdev_zshrc="${ZDOTDIR:-${HOME}}/.zshrc"

# Global variables
export CXDEV_DOWNLOAD_URL="https://github.com/sapcxtools/environment/archive/refs/tags/"
export CXDEV_VERSION="1.0.1"
export CXDEV_HASH="b7c94cb2d1eded98fbea2672397207ce"
export CXDEV_INSTALL_DIR="$HOME/.cxdev"

_installCXDEVEnvironment () {
	echo "  ___  _  _  ____  ____  _  _ "
	echo " / __)( \\/ )(    \\(  __)/ )( \\"
	echo "( (__  )  (  ) D ( ) _) \\ \\/ /"
	echo " \\___)(_/\\_)(____/(____) \\__/ "
	echo "                   .__                                            __   ";
	echo "  ____   _______  _|__|______  ____   ____   _____   ____   _____/  |_ ";
	echo "_/ __ \\ /    \\  \\/ /  \\_  __ \\/  _ \\ /    \\ /     \\_/ __ \\ /    \\   __\\";
	echo "\\  ___/|   |  \\   /|  ||  | \\(  <_> )   |  \\  Y Y  \\  ___/|   |  \\  |  ";
	echo " \\___  >___|  /\\_/ |__||__|   \\____/|___|  /__|_|  /\\___  >___|  /__|  ";
	echo "     \\/     \\/                           \\/      \\/     \\/     \\/      ";
	echo ""
	echo "Welcome to CXDEV environment installer, v${CXDEV_VERSION}"
	echo ""

	# Check if already installed
	if [ -f "$CXDEV_INSTALL_DIR/.version" ]; then
		installedVersion=$(cat $CXDEV_INSTALL_DIR/.version)

		echo "You already have CXDEV environment installed."
		echo "- Path   : ${CXDEV_INSTALL_DIR}"
		echo "- Version: ${installedVersion}"
		echo ""

		if [[ "$installedVersion" == "$CXDEV_VERSION" ]]; then
			echo "This version is already installed."
			exit 0
		else
			echo -n >&2 "Do you want us to update your CXDEV environment with version ${CXDEV_VERSION}? [y/N] "
			read runUpdate
			if [[ "Y" != "$runUpdate" && "y" != "$runUpdate" ]]; then
				echo "Installer aborted."
				exit 1
			else
				find ${CXDEV_INSTALL_DIR} -type f -not \( -name "dependencies" -prune \) -exec rm -rf {} \;
			fi
		fi
	fi

	# Sanity checks
	echo "Checking the following dependencies for CXDEV environment:"
	declare -i unresolved_dependencies=0

	if type md5sum 2>&1 > /dev/null ; then
		echo "- md5sum found!"
	else
		unresolved_dependencies+=1
		echo "- md5sum not found!"
	fi

	if type unzip 2>&1 > /dev/null ; then
		echo "- unzip found!"
	else
		unresolved_dependencies+=1
		echo "- unzip not found!"
	fi

	if type curl 2>&1 > /dev/null ; then
		echo "- curl found!"
	else
		unresolved_dependencies+=1
		echo "- curl not found!"
	fi

	if type sed 2>&1 > /dev/null ; then
		echo "- sed found!"
	else
		unresolved_dependencies+=1
		echo "- sed not found!"
	fi

	if [ ! -z "$SDKMAN_DIR" ] ; then
		echo "- SDKman found!"
	else
		echo "- SDKman not found!"
		echo -n >&2 "  Do you want us to install SDKman for you? [Y/n] "
		read installSDKman
		if [[ "n" == "$installSDKman" || "N" == "$installSDKman" ]]; then
			echo "  SDKman installation skipped!"
			unresolved_dependencies+=1
		elif ! _installSDKman ; then
			unresolved_dependencies+=1
		fi
	fi

	if type nodenv 2>&1 > /dev/null ; then
		echo "- nodenv found!"
	else
		echo "- nodenv not found!"

		echo -n >&2 "  Do you want us to install nodenv for you? [Y/n] "
		read installNodenv
		if [[ "n" == "$installNodenv" || "N" == "$installNodenv" ]]; then
			echo "  nodenv installation skipped!"
			unresolved_dependencies+=1
		elif ! _installNodEnv; then
			unresolved_dependencies+=1
		fi
	fi

	if [ "$unresolved_dependencies" != "0" ]; then
		echo "$unresolved_dependencies unresolved dependencies."
		echo "Please install all dependencies on your system using your favourite package manager and then restart the installer."
		exit
	fi

	echo ""
	echo "Attempt to install CXDEV environment"
	echo "- version : ${CXDEV_VERSION}"
	echo "- location: ${CXDEV_INSTALL_DIR}"
	echo ""
    
	# Create structure
	mkdir -p $CXDEV_INSTALL_DIR
	mkdir -p $CXDEV_INSTALL_DIR/tmp

	# Download
	echo "Fetch CXDEV environment from: ${CXDEV_DOWNLOAD_URL}${CXDEV_VERSION}.zip"
	cxdev_zip_file="${CXDEV_INSTALL_DIR}/tmp/cxdev-${CXDEV_VERSION}.zip"
	curl --fail --location -o "$cxdev_zip_file" "${CXDEV_DOWNLOAD_URL}${CXDEV_VERSION}.zip"

	# check integrity
	ARCHIVE_OK=$(unzip -qt "$cxdev_zip_file" | grep 'No errors detected in compressed data')
	ARCHIVE_INTEGRITY=($(md5sum "$cxdev_zip_file"))
	if [[ -z "$ARCHIVE_OK" || "$ARCHIVE_INTEGRITY" != "$CXDEV_HASH" ]]; then
		echo "Downloaded ZIP archive is corrupt."
		echo "- Are you connected to the internet?"
		echo "- Are you using a proxy server?"
		echo "- Is the downloaded file valid?"
		exit 1
	fi

	# extract archive
	echo "Extract successfully downloaded ZIP archive."
	unzip -qo "$cxdev_zip_file" -d "$CXDEV_INSTALL_DIR/tmp"

	# copy over files
	echo "Copy files to installation location."
	cp -r "$CXDEV_INSTALL_DIR/tmp/environment-$CXDEV_VERSION/." "$CXDEV_INSTALL_DIR"

	# store version
	echo "$CXDEV_VERSION" > "$CXDEV_INSTALL_DIR/.version"

	# clean up
	echo "Cleaning up temporary files."
	rm -rf "$CXDEV_INSTALL_DIR/tmp"

	# link in profile
	cxdev_init_snippet=$(cat <<-END
# CXDEV Environment
source "$CXDEV_INSTALL_DIR/cxdev.sh"
#export CXDEVSYNCDIR="/mnt/sapartefacts"
END
)
	if [ -w $cxdev_zshrc ] && ! grep -q "cxdev.sh" "$cxdev_zshrc"; then
		echo "Adding cxdev initialization snippet to: $cxdev_zshrc"
		echo -e "\n$cxdev_init_snippet" >> "$cxdev_zshrc"
	fi
	if [ -w $cxdev_bashrc ] && ! grep -q "cxdev.sh" "$cxdev_bashrc"; then
		echo "Adding cxdev initialization snippet to: $cxdev_bashrc"
		echo -e "\n$cxdev_init_snippet" >> "$cxdev_bashrc"
	fi

	echo ""
	echo "CXDEV environment setup is done!"
	echo ""
	echo "Now, you may want to set your CXDEVSYNCDIR in your terminal configuration file (.bashrc or .zshrc) to point to a shared folder (eg. OneDrive)."
	echo ""
	echo "Afterwards, please open a new terminal, or run the following in the existing one:"
	echo ""
	echo "   source \"${CXDEV_INSTALL_DIR}/cxdev.sh\""
	echo ""
	echo "Thank you for using CXDEV environment :)"
	echo ""
}

_installSDKman () {
	echo "==============================================================================="
	echo "Trying to install SDKman using installer script"
	echo "Executing: curl -s \"https://get.sdkman.io\" | bash"
	echo ""
	
	curl -s "https://get.sdkman.io" | bash > >( _indentInstallerOutput )
	sdkmanInstallResultCode=$?
	if [[ "$sdkmanInstallResultCode" == "0" ]]; then
		echo "" 
		echo "Installation of SDKman was successful."

		# link in profile
		sdkman_init_snippet=$(cat <<-END
# Initialize SDKMAN
export SDKMAN_DIR="$HOME/.sdkman"
[[ -s "$HOME/.sdkman/bin/sdkman-init.sh" ]] && source "$HOME/.sdkman/bin/sdkman-init.sh"
END
)
		if [ -w $cxdev_zshrc ] && ! grep -q "SDKMAN_DIR" "$cxdev_zshrc"; then
			echo "Adding SDKman initialization snippet to: $cxdev_zshrc"
			echo -e "\n$sdkman_init_snippet" >> "$cxdev_zshrc"
		fi
		if [ -w $cxdev_bashrc ] && ! grep -q "SDKMAN_DIR" "$cxdev_bashrc"; then
			echo "Adding SDKman initialization snippet to: $cxdev_bashrc"
			echo -e "\n$sdkman_init_snippet" >> "$cxdev_bashrc"
		fi

		echo "==============================================================================="
		return 0
	else 
		echo "" 
		echo "Installation of SDKman not successful (Status: $sdkmanInstallResultCode)."
		echo "==============================================================================="
		return 1
	fi
}

_installNodEnv () {
	echo "==============================================================================="
	echo "Trying to install nodenv using installer script"
	echo "Executing: curl -fsSL \"https://github.com/nodenv/nodenv-installer/raw/HEAD/bin/nodenv-installer\" | bash"
	echo ""
	curl -fsSL "https://github.com/nodenv/nodenv-installer/raw/HEAD/bin/nodenv-installer" | bash > >( _indentInstallerOutput )
	nodenvInstallResultCode=$?
	if [[ "$nodenvInstallResultCode" == "0" ]]; then
		echo "" 
		echo "Installation of nodenv was successful."

		# link in profile
		if [ -w $cxdev_zshrc ] && ! grep -q "nodenv init" "$cxdev_zshrc"; then
			echo "Adding nodenv initialization snippet to: $cxdev_zshrc"
			echo -e "\n# Initialize NODENV" >> "$cxdev_zshrc"
			echo "export PATH=\"${ZDOTDIR:-${HOME}}/.nodenv/bin:$PATH\"" >> "$cxdev_zshrc"
			echo 'eval "$(nodenv init - zsh)"' >> "$cxdev_zshrc"
		fi
		if [ -w $cxdev_bashrc ] && ! grep -q "nodenv init" "$cxdev_bashrc"; then
			echo "Adding nodenv initialization snippet to: $cxdev_bashrc"
			echo -e "\n# Initialize NODENV" >> "$cxdev_bashrc"
			echo "export PATH=\"${ZDOTDIR:-${HOME}}/.nodenv/bin:$PATH\"" >> "$cxdev_bashrc"
			echo 'eval "$(nodenv init - bash)"' >> "$cxdev_bashrc"
		fi

		echo "==============================================================================="
		return 0
	else
		echo "" 
		echo "Installation of nodenv not successful (Status: $nodenvInstallResultCode)."
		echo "==============================================================================="
		return 1
	fi
}

_indentInstallerOutput () {
	sed 's/^/[INSTALLER] /'
}

_installCXDEVEnvironment