baseproc16-default/theme_xresources

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#!/usr/bin/env bash
readonly dependency=("binaryplease/base16-xresources")
readonly app="xresources"
path="$1"
package="$2"
theme="$3"
permanent="$4"
## Main Entrypoint
#
# Finds the right theme template file and starts theme
# switching and, if necessary, permanent setting processes.
main() {
dbg_msg $app "Starting Processor"
tfile="$path/$package/xresources/base16-$theme.Xresources"
if ! file_exists "$tfile"; then
dbg_msg $app "error" "Theme template $theme not found in package $package"
exit 1
fi
if [[ "$permanent" == "true" ]]; then save; fi
theme
dbg_msg $app "Processor Done"
}
## Theme switcher
#
# Makes sure that if any application instance is
# currently running, it switches to new theme.
theme() {
dbg_msg $app "Switching theme"
xrdb -merge "$tfile"
theme_post
dbg_msg $app "Successfully switched theme"
}
## Post Theme hook
#
# Will restart any running custom applications that need it.
# Some applications reading from Xresources need a restart
# to use the new settings.
theme_post() {
type polybar-launch >/dev/null 2>&1 && {
polybar-launch simple-top >/dev/null
dbg_msg $app "Restarting polybar"
}
}
## Theme setter
#
# Takes care of permanently writing the desired
# base16 theme into application settings.
save() {
dbg_msg $app "Saving theme"
local x_dir="${XDG_CONFIG_HOME:-/$HOME/.config}/xresources"
local x_optdir="$x_dir/Xresources.d"
if [[ -d "$x_optdir" ]]; then
cat "$tfile" >"$x_optdir/colorscheme"
dbg_msg $app "Saved theme to $x_optdir/colorscheme"
include "$x_dir"
else
dbg_msg $app "warn" "No configuration directory found"
fi
}
## Theme includer
#
# Makes sure that theme is actually included in
# default application startup routine.
# This is the most invasive step of theming since it
# rewrites within existing configuration files.
include() {
dbg_msg $app "Including theme in configuration"
local x_dir="$1"
if file_exists "$x_dir/Xresources"; then
line_exists_or_append "$x_dir/Xresources" '#include "Xresources.d/colorscheme"'
dbg_msg $app "Successfully included theme in configuration"
else
dbg_msg $app "warn" "No default configuration file found"
fi
}
# Safe sourcing: https://stackoverflow.com/a/12694189
DIR="${BASH_SOURCE%/*}"
if [[ ! -d "$DIR" ]]; then DIR="$PWD"; fi
# shellcheck source=utilities.sh
. "$DIR/utilities.sh"
## Dependency Checker
#
# Makes sure the processor is called for the correct
# base16 package, or refuses to run if it is not.
if printf '%s\n' "${dependency[@]}" | grep -q -P "^$package$"; then
main
else
dbg_msg $app "error" "Processor does not work for package $package"
fi