Standardize and harden Arch Linux setup scripts

amd/amd-drivers.sh

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -euo pipefail
 
 # Don't allow users to run this script as root
 if ((EUID == 0)); then
@@ -15,3 +16,19 @@ printf "\n"
 # This also covers AMD integrated/APU graphics, since they use the same amdgpu/Mesa driver stack as discrete Radeon cards
 echo "Installing AMD graphics drivers"
 sudo pacman -Syu --needed mesa lib32-mesa vulkan-radeon lib32-vulkan-radeon vulkan-icd-loader lib32-vulkan-icd-loader libva-mesa-driver lib32-libva-mesa-driver
+
+# CachyOS recommends increasing AMD's shader cache size to 12GB for gaming.
+echo "Configuring AMD shader cache"
+mkdir -p "$HOME/.config/environment.d"
+gaming_config="$HOME/.config/environment.d/gaming.conf"
+touch "$gaming_config"
+
+if grep -q '^MESA_SHADER_CACHE_MAX_SIZE=' "$gaming_config"; then
+    sed -i 's/^MESA_SHADER_CACHE_MAX_SIZE=.*/MESA_SHADER_CACHE_MAX_SIZE=12G/' "$gaming_config"
+else
+    cat << 'EOF' >> "$gaming_config"
+
+# Increase AMD's shader cache size to 12GB
+MESA_SHADER_CACHE_MAX_SIZE=12G
+EOF
+fi

amd/hardware-acceleration.sh

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -euo pipefail
 
 # Don't allow users to run this script as root
 if ((EUID == 0)); then

desktop-environment/gnome.sh

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -euo pipefail
 
 # Don't allow users to run this script as root
 if ((EUID == 0)); then
@@ -19,9 +20,10 @@ if [[ -e /etc/systemd/system/display-manager.service ]]; then
     fi
 fi
 
-# Enables the GDM display manager so GNOME starts automatically on boot
+# Enables the GDM display manager so GNOME starts automatically on boot.
+# --force replaces an existing display-manager.service symlink when switching DMs.
 echo "Enabling GDM display manager"
-sudo systemctl enable gdm.service
+sudo systemctl enable --force gdm.service
 
 # Enables NetworkManager so networking works out of the box in GNOME
 echo "Enabling NetworkManager"

desktop-environment/kde-plasma.sh

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -euo pipefail
 
 # Don't allow users to run this script as root
 if ((EUID == 0)); then
@@ -18,9 +19,10 @@ if [[ -e /etc/systemd/system/display-manager.service ]]; then
     fi
 fi
 
-# Enables the SDDM display manager so KDE Plasma starts automatically on boot
+# Enables the SDDM display manager so KDE Plasma starts automatically on boot.
+# --force replaces an existing display-manager.service symlink when switching DMs.
 echo "Enabling SDDM display manager"
-sudo systemctl enable sddm.service
+sudo systemctl enable --force sddm.service
 
 # Enables NetworkManager so networking works out of the box in Plasma
 echo "Enabling NetworkManager"

intel/hardware-acceleration.sh

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -euo pipefail
 
 # Don't allow users to run this script as root
 if ((EUID == 0)); then

intel/intel-drivers.sh

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -euo pipefail
 
 # Don't allow users to run this script as root
 if ((EUID == 0)); then

misc/disable-touchpad-mouse.sh

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -euo pipefail
 
 # Don't allow users to run this script as root
 if ((EUID == 0)); then

nvidia/hardware-acceleration.sh

@@ -1,24 +1,25 @@
 #!/usr/bin/env bash
+set -euo pipefail
 
 # Don't allow users to run this script as root
 if ((EUID == 0)); then
     echo "This script should not be run as root. Please run it as a regular user."
     exit 1
 fi
 
-# Install packages for Nvidia hardware acceleration
-echo "Installing Nvidia VA-API driver"
+# Install packages for NVIDIA hardware acceleration
+echo "Installing NVIDIA VA-API driver"
 sudo pacman -Syu --needed libva-nvidia-driver
 
-# Sets environment variables for Nvidia hardware acceleration for VA-API, VDPAU, and CUDA
-# Essentially improves video playback and hardware acceleration for Nvidia GPUs
-if grep -q "Nvidia hardware acceleration environment variables" /etc/environment 2> /dev/null; then
-    echo "Nvidia hardware acceleration environment variables are already set, skipping."
+# Sets environment variables for NVIDIA hardware acceleration for VA-API, VDPAU, and CUDA
+# Essentially improves video playback and hardware acceleration for NVIDIA GPUs
+if grep -q "NVIDIA hardware acceleration environment variables" /etc/environment 2> /dev/null; then
+    echo "NVIDIA hardware acceleration environment variables are already set, skipping."
 else
-    echo "Setting environment variables for Nvidia hardware acceleration"
+    echo "Setting environment variables for NVIDIA hardware acceleration"
     cat << 'EOF' | sudo tee -a /etc/environment > /dev/null
 
-# Nvidia hardware acceleration environment variables
+# NVIDIA hardware acceleration environment variables
 MOZ_DISABLE_RDD_SANDBOX=1
 LIBVA_DRIVER_NAME=nvidia
 VDPAU_DRIVER=nvidia

nvidia/nvidia-drivers.sh

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+set -euo pipefail
 
 # Don't allow users to run this script as root
 if ((EUID == 0)); then
@@ -11,35 +12,43 @@ echo "If it's not enabled, please close the script and do that before running th
 read -n 1 -s -r -p "Press any key to continue..."
 printf "\n"
 
-# Installs Nvidia, Vulkan, and OpenCL packages
+# Installs NVIDIA, Vulkan, and OpenCL packages
 linux_kernel=$(uname -r)
 case "$linux_kernel" in
     *-arch*)
-        echo "Installing Nvidia drivers for Arch Linux kernel"
+        echo "Installing NVIDIA drivers for Arch Linux kernel"
         sudo pacman -Syu --needed nvidia-open nvidia-utils lib32-nvidia-utils nvidia-settings vulkan-icd-loader lib32-vulkan-icd-loader opencl-nvidia lib32-opencl-nvidia
         ;;
     *-lts*)
-        echo "Installing Nvidia drivers for Linux LTS kernel"
+        echo "Installing NVIDIA drivers for Linux LTS kernel"
         sudo pacman -Syu --needed nvidia-open-lts nvidia-utils lib32-nvidia-utils nvidia-settings vulkan-icd-loader lib32-vulkan-icd-loader opencl-nvidia lib32-opencl-nvidia
         ;;
     *-hardened*|*-zen*|*-cachyos*)
-        echo "Installing Nvidia drivers for Other Linux kernel: $linux_kernel"
+        echo "Installing NVIDIA drivers for other Linux kernel: $linux_kernel"
         sudo pacman -Syu --needed nvidia-open-dkms nvidia-utils lib32-nvidia-utils nvidia-settings vulkan-icd-loader lib32-vulkan-icd-loader opencl-nvidia lib32-opencl-nvidia
         ;;
     *)
-        echo "Installing Nvidia drivers for unknown kernel: $linux_kernel"
+        echo "Installing NVIDIA drivers for unknown kernel: $linux_kernel"
         sudo pacman -Syu --needed nvidia-open-dkms nvidia-utils lib32-nvidia-utils nvidia-settings vulkan-icd-loader lib32-vulkan-icd-loader opencl-nvidia lib32-opencl-nvidia
         ;;
 esac
 
-# Creates a conf file to enable suspend and resizable bar, and also disables Nvidia link.
-echo "Creating Nvidia modprobe file"
+# Creates a conf file to enable suspend and resizable bar, and also disables NVIDIA link.
+echo "Creating NVIDIA modprobe file"
 echo 'options nvidia NVreg_PreserveVideoMemoryAllocations=1 NVreg_EnableResizableBar=1 NVreg_NvLinkDisable=1 NVreg_UseKernelSuspendNotifiers=1' | sudo tee /etc/modprobe.d/nvidia-kernel-parameters.conf > /dev/null
 
-# Increases maximum shader cache size to reduce stutters
-echo "Creating Nvidia shader cache configuration file"
-mkdir -p ~/.config/environment.d
-cat << 'EOF' > ~/.config/environment.d/nvidia-shader-cache.conf
-# Increase Nvidia's shader cache size to 12GB
+# CachyOS recommends increasing NVIDIA's shader cache size to 12GB for gaming.
+echo "Configuring NVIDIA shader cache"
+mkdir -p "$HOME/.config/environment.d"
+gaming_config="$HOME/.config/environment.d/gaming.conf"
+touch "$gaming_config"
+
+if grep -q '^__GL_SHADER_DISK_CACHE_SIZE=' "$gaming_config"; then
+    sed -i 's/^__GL_SHADER_DISK_CACHE_SIZE=.*/__GL_SHADER_DISK_CACHE_SIZE=12000000000/' "$gaming_config"
+else
+    cat << 'EOF' >> "$gaming_config"
+
+# Increase NVIDIA's shader cache size to 12GB
 __GL_SHADER_DISK_CACHE_SIZE=12000000000
 EOF
+fi