xtalk/installer at master · 3hhh/xtalk · GitHub

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#!/bin/bash
#
# installer for xtalk and related packages inside a python venv
#

function errorOut {
>&2 echo "ERROR: $1"
>&2 echo "Aborting..."
exit 1
}

#name of the directory this script resides in (hopefully)
SCRIPT_DIR="$(readlink -f "${BASH_SOURCE[0]}")" || errorOut "Failed to execute readlink."
SCRIPT_DIR="$(dirname "$SCRIPT_DIR")" || errorOut "Failed to execute dirname."

#name of this script
SCRIPT_NAME="${BASH_SOURCE[0]##*/}"

#where to find the offline packages
PKG_DIR="$SCRIPT_DIR/pkgs"

#where to write the binary
BIN="$SCRIPT_DIR/xtalk"

#default venv install path
ENV_DIR="$HOME"
#ENV is initialized later

function usage {
echo "Usage: $SCRIPT_NAME install|uninstall|reinstall [env dir]

[env dir]: Path to the directory where to install the python venv to.  Default: $ENV_DIR"
exit 1
}

function isInstalled {
[ -d "$ENV" ] || [ -f "$BIN" ]
}

function installR {
isInstalled && errorOut "$BIN already appears to be installed. Either remove the existing installation manually beforehand or use the reinstall command."

echo "Creating the python venv at $ENV..."
#NOTE: python3-rtmidi must be installed via the package manager as it involves a lot of OS binary dependencies which we cannot all know at the time of offline download
python3 -m venv --system-site-packages "$ENV" || errorOut "Failed to create the python venv."

echo "Installing the dependencies inside the python venv..."
source "$ENV/bin/activate" || errorOut "Failed to activate the python venv at $ENV."
cd "$PKG_DIR" || errorOut "Failed to switch to $PKG_DIR."

#install dependencies
pip3 install --no-index --find-links=. pynput || errorOut "Failed to install pynput."

#create binary
cat << EOF > "$BIN" || errorOut "Failed to write to $BIN."
#!/bin/bash

function errorOut {
>&2 echo "ERROR: \$1"
>&2 echo "Aborting..."
exit 1
}

source "$ENV/bin/activate" || errorOut "Failed to activate the python venv at $ENV."
exec python3 "$SCRIPT_DIR/xtalk.py" "\$@"
EOF
chmod +x "$BIN" || errorOut "Failed to make $BIN executable."
}

function uninstallR {
echo "Removing $BIN..."
rm -f "$BIN"

echo "Removing $ENV..."
rm -rf "$ENV"

return 0
}

function reinstallR {
uninstallR || errorOut "Failed to uninstall."
installR
}

function main {
[ $# -lt 1 ] && usage
[ $# -gt 2 ] && usage

[ $EUID -eq 0 ] && errorOut "This script must not be run as root."
[ -z "$HOME" ] && errorOut "The HOME variable is not set."

#parse commands
local cmd="$1"
ENV="${2:-$ENV_DIR}"
[ -d "$ENV" ] || errorOut "Not an existing directory: $ENV"
ENV="$ENV/xtalk-venv"

case "$cmd" in
	install)
	installR
	;;

	uninstall)
	uninstallR
	;;

	reinstall)
	reinstallR
	;;

	*)
	usage
	;;
esac

echo "All done."
exit 0
}

main "$@"