dotfiles/run_after_gnome_monitors.zsh.tmpl at main · AndreasBackx/dotfiles · GitHub

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#!/usr/bin/env zsh

{{ if .headless }}
# We're headless.
exit 0
{{ end }}

set -o errexit -o nounset -o pipefail

from="$HOME/.config/monitors.xml"
to="/var/lib/gdm/.config/monitors.xml"

function perform_copy() {
    local to_dir
    to_dir=$(dirname "$to")
    >&2 echo "Creating directory $to_dir..."
    sudo mkdir -p "$to_dir"
    >&2 echo "Changing folder permission $to_dir..."
    sudo chmod 755 "$to_dir"
    >&2 echo "Changing folder ownership $to_dir..."
    sudo chown "$(id -u gdm):$(id -g gdm)" "$to_dir"

    >&2 echo "Copying $from to $to..."
    sudo cp "$from" "$to"
    >&2 echo "Setting ownership to gdm..."
    sudo chown "$(id -u gdm):$(id -g gdm)" "$to"
    >&2 echo "Setting file permissions..."
    sudo chmod 644 "$to"
}

if ! id -u gdm >/dev/null 2>&1; then
    >&2 echo "gdm user does not exist, skipping monitor sync."
    exit 0
fi

if [ ! -f "$from" ]; then
    >&2 echo "$from does not exist."
elif test ! -f "$to"; then
    >&2 echo "$to does not exist."
    perform_copy
elif ! cmp --silent "$from" "$to"; then
    >&2 echo "$from changed."
    perform_copy
else
    >&2 echo "$from == $to"
fi