Allow selection of driver version and set 14ab2ff as current default

Make the driver version a cmd line flag instead of config

Update README driver text

Actually do the checkout

README.md

@@ -135,26 +135,29 @@ It will also install the following python libraries that are required for certai
 * [MLB-StatsAPI](https://pypi.org/project/MLB-StatsAPI/): The main library that fetches and parses all of the actual MLB data being displayed
 * [RGBMatrixEmulator](https://github.com/ty-porter/RGBMatrixEmulator): The emulation library for the matrix display. Useful for running on MacOS or Linux, or for development.
 
-#### Installation on Non-Raspberry Pi Hardware
+#### Customizing the Installation
 
-The installation script is designed for physical hardware. When attempting to install it on other platforms, you should not use `sudo` to install the dependencies. In addition, you can pass the `--emulator-only` argument to skip installation steps that aren't required.
+Additional flags are available for customizing your install:
 
 ```
-sh install.sh --emulator-only
-```
+-a, --skip-all          Skip all dependencies and config installation (equivalent to -c -p -m).
+-c, --skip-config       Skip updating JSON configuration files.
+-m, --skip-matrix       Skip building matrix driver dependency. Video display will default to emulator mode.
+-p, --skip-python       Skip Python 3 installation. Requires manual Python 3 setup if not already installed.
 
-Additional flags are available for customizing your install:
+-v, --no-venv           Do not create a virtual environment for the dependencies.
+-e, --emulator-only     Do not install dependencies under sudo. Skips building matrix dependencies (equivalent to -m)
+-d, --driver            Specify a branch name or commit SHA for the rpi-rgb-led-matrix library. (Optional. Defaults may change.)
 
+-h, --help              Display this help message
 ```
--p, --skip-python  Skips Python 3 installation. You will need to install it via your platform's appropriate package manager.
--m, --skip-matrix  Skips RPI-specific matrix driver installation and build.
--c, --skip-config  Skips default config overwrite without prompting.
 
--a, --skip-all     Performs all above skips.
---no-venv          Do not create a virtual environment for the dependencies.
---emulator-only    Do not install dependencies under sudo. Skips building matrix dependencies.
+#### Installation on Non-Raspberry Pi Hardware
+
+The installation script is designed for physical hardware. When attempting to install it on other platforms, you should not use `sudo` to install the dependencies. In addition, you can pass the `--emulator-only` argument to skip installation steps that aren't required.
 
--h, --help         Displays help
+```
+sh install.sh --emulator-only
 ```
 
 #### Updating

install.sh

@@ -1,58 +1,65 @@
 #!/bin/bash
 
+SKIP_PYTHON=false
+SKIP_CONFIG=false
+SKIP_MATRIX=false
+NO_SUDO=false
+SKIP_VENV=false
+DRIVER_SHA=14ab2ff
+
 usage() {
     cat <<USAGE
 
-    Usage: $0 [-a] [-c] [-m] [-p]
+    Usage: $0 [-acmpve] [-d / --driver string]
 
     Options:
-        -c, --skip-config:  Skip updating JSON configuration files.
-        -m, --skip-matrix:  Skip building matrix driver dependency. Video display will default to emulator mode.
-        -p, --skip-python:  Skip Python 3 installation. Requires manual Python 3 setup if not already installed.
+        -a, --skip-all          Skip all dependencies and config installation (equivalent to -c -p -m).
+        -c, --skip-config       Skip updating JSON configuration files.
+        -m, --skip-matrix       Skip building matrix driver dependency. Video display will default to emulator mode.
+        -p, --skip-python       Skip Python 3 installation. Requires manual Python 3 setup if not already installed.
 
-        -a, --skip-all:     Skip all dependencies and config installation (equivalent to -c -p -m).
-        --no-venv           Do not create a virtual environment for the dependencies.
-        --emulator-only:    Do not install dependencies under sudo. Skips building matrix dependencies (equivalent to -m)
+        -v, --no-venv           Do not create a virtual environment for the dependencies.
+        -e, --emulator-only     Do not install dependencies under sudo. Skips building matrix dependencies (equivalent to -m)
+        -d, --driver            Specify a branch name or commit SHA for the rpi-rgb-led-matrix library. (Defaults to "$DRIVER_SHA")
 
+        -h, --help              Display this help message
 USAGE
     exit 1
 }
 
-SKIP_PYTHON=false
-SKIP_CONFIG=false
-SKIP_MATRIX=false
-NO_SUDO=false
-SKIP_VENV=false
-
-for arg in "$@"; do
-    case $arg in
+while [ $# -gt 0 ]; do
+    case "$1" in
     -p | --skip-python)
         SKIP_PYTHON=true
-        shift # Remove -p / --skip-python from `$@`
+        shift
         ;;
     -c | --skip-config)
         SKIP_CONFIG=true
-        shift # Remove -c / --skip-config from `$@`
+        shift
         ;;
     -m | --skip-matrix)
         SKIP_MATRIX=true
-        shift # Remove -m / --skip-matrix from `$@`
+        shift
         ;;
     -a | --skip-all)
         SKIP_CONFIG=true
         SKIP_MATRIX=true
         SKIP_PYTHON=true
         SKIP_VENV=true
-        shift # Remove -a / --skip-all from `$@`
+        shift
         ;;
-    --emulator-only)
+    -e | --emulator-only)
         SKIP_MATRIX=true
         NO_SUDO=true
-        shift # remove --emulator-only from `$@`
+        shift
         ;;
-    --no-venv)
+    -v | --no-venv)
         SKIP_VENV=true
-        shift # remove --no-venv from `$@`
+        shift
+        ;;
+    -d | --driver)
+        DRIVER="$2"
+        shift 2
         ;;
     -h | --help)
         usage # run usage function on help
@@ -134,6 +141,8 @@ if [ "$SKIP_MATRIX" = false ]; then
     cd submodules
     git clone https://github.com/hzeller/rpi-rgb-led-matrix.git matrix
     cd matrix
+    # Checkout the branch or commit specified for rpi-rgb-led-matrix
+    git checkout $DRIVER_SHA
     git pull
     make build-python PYTHON="$PYTHON"
     sudo make install-python PYTHON="$PYTHON"